How to increase the charge of the generator using an additional diode

How to increase generator voltage

Many motorists have encountered the concept of low voltage in the network. The culprit of the situation was the generator, which produced an insufficient amount of current. Is there any way to increase the voltage produced by the unit? How to increase the power of the generator without damaging the circuit and the overall system.

How to increase the voltage of a VAZ-2114 generator: increasing power

As you know, additional equipment is often installed on a car, which draws additional voltage from the on-board network.
Thus, the voltage indicator on a VAZ-2114 can drop to a critical level of 11 volts. If you also install additional air conditioning or heated seats, this may result in the starter not having enough power to start the engine. How to fix the problem? Make sure that the voltage in the on-board network increases. Video about increasing the voltage in the on-board network on VAZ cars:

The video will tell you how to increase the voltage of the generator and on-board network with your own hands, and will also tell you about some of the nuances and subtleties of the process

We increase the voltage - all options for solving the problem

Voltage in the on-board network after modification

So, many motorists may decide that the way out of this situation is to install a high-power generator, but at the same time they will have to replace the battery with a more capacitive one. This is done in order not to “kill” the battery that is installed on the car, since a voltage overload will lead to the destruction of the internal cells. This option is not suitable because it is too expensive.

The second option is to install an additional diode from another diode bridge or marked KD202V. This is much cheaper than changing the generator and battery, but you will have to tinker a little. To begin with, it is recommended to study automobile electrical circuits and the operation of the generator, as well as the charging circuit.

Installing the KD202V diode into the generator

When everything is ready, we proceed directly to installing the diode in the generator to increase the voltage in the on-board network. Let's consider the sequence of actions:

Remove the back cover of the generator.

Remove the back cover from the generator

We take pieces of wire and solder them.

Wires and diode to increase voltage

• We solder the diode and wiring. View of soldered wires and diode View of soldered diode from the other side
• We install a limiter for the male and female wires.

Installing heat shrink for male and female wires

We install a wire limiter for the diode.

Installed heat shrink for the soldered part

• We connect the diode to the voltage regulator. We connect the diode to the voltage regulator
• We mount a regulator with a diode.
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We install a voltage regulator with a diode in the generator

We assemble the generator and also connect it.

We put the back cover on the generator and take out the wires

As the measurements showed, after such an improvement, the voltage in the loaded network was 12.2-12.5 volts.

Electrical diagrams and indicators

To increase the voltage even more, at least to 14 volts, it is necessary to install a diode in circuit D, the voltage regulator. Any diode with a breakdown voltage of 20V and a current of at least 5A is suitable. The voltage drop is preferably no more than 0.6-0.7V. The 2D219B diode is excellent.

Uform(V)Ipr(A)Upr(V)Iarb(mA)Housing

2D219A	15	10	0.6(10A)	20 (15V)	KD-11
2D219B	20	10	0.6(10A)	20 (20V)	KD-11
2D219V	15	10	0.45(10A)	20 (15V)	KD-11
2D219G	20	10	0.45(10A)	20 (20V)	KD-11

Let's look at the circuit diagrams of diodes:

Manufacturing and installation of a diode in a VAZ-2114 generator

Now that everything is ready, we install an additional diode, more powerful than the previous one. You will need half a meter of wire 2*0.75mm. We solder the ends to the female and male terminals No. 4. We dress them in cambric, or better yet, in heat shrink. By the way, the old one must be removed from the system. Let's take action:

1. Now, solder the following circuit to the diode: mother to the cathode, folder to the anode.

   
   Diode to increase voltage

2. We insulate the diode. For example, we take a film container.

   
   Solder the wires to the diode

   
   We insulate the diode using a plastic container

3. We remove the “minus terminal” from the battery.
4. We unscrew the “+” wires from the generator, disconnect the “D” wire to the tidy.
5. Remove the generator cover.

Remove the back cover from the generator

Through the slots in the cover, we connect the “mother” to the LV, the “father” to the standard wire.

Connect the wires going to the diode

We carry out the assembly.

We attach the diode where there is enough wire and assemble the generator

Now, everything is ready for the final check and measurements.

Final voltage measurements and results

After the installation was completed and the entire electrical circuit was working, voltage measurements were made at idle speed of the running engine. The results surpassed themselves; the voltage in the entire electrical circuit increased.

Features of installing a diode in a battery

Advice. This method is best suited for solving the problem of insufficient voltage in the on-board network. In order for the problem to be resolved as soon as possible, all actions should be performed sequentially.

• First you need to remove the generator cover. This is extremely easy to do, so you don’t have to spend a lot of time on this operation;

This completes the first stage of work. It is necessary to check how accurately all procedures were performed. If any mistakes were made, they should be corrected immediately, otherwise any unpleasant consequences may occur.

When the verification is completed, you can move on to the second stage of work.

Now you need to install a limiter for the female and male wires.

As a result, the voltage in a fully loaded network should be approximately 12.3 V. This will be quite enough for the normal operation of all devices installed in the car.

If a motorist needs increased voltage, which can reach 14 V, then you need to install a diode in circuit D. For this, any diode with a voltage of 20 V is suitable. The current strength of such a diode should reach 5 A.

How to increase the generator charge using an additional diode

Many motorists have encountered the concept of low voltage in the network. The culprit of the situation was the generator, which produced an insufficient amount of current. Is there any way to increase the voltage produced by the unit? How to increase the power of the generator without damaging the circuit and the overall system.

Diode in the circuit

Installing a diode with a toggle switch is the easiest way to increase the voltage. There is no need to bother, look for a lot of information in books, etc. Everything is as accessible as possible, no special difficulties.

This option of increasing the voltage, despite its simplicity, gives the most reliable result. Ideally suited for domestic and VAZ car models.

The purpose of this method of increasing the voltage in the vehicle's on-board network is to deceive the regulator, which is located inside the generator. As you know, on old domestic car models (kopek, VAZ 2105, etc.) the voltage drop sometimes reaches critical values ​​- sometimes it drops to 12.5 volts. The battery, of course, will not be charged at this voltage.

A voltage regulator is the same brushes, a tablet, a chocolate bar - there are many names, but it is the same element that is responsible for regulating the voltage in the generator. On our domestic cars, mostly older ones, the tablets are of poor quality. They do not regulate voltage well, and as mentioned above, sometimes the current value drops below the baseboard.

So, what you need to do is insert an additional diode into the circuit. By this we will achieve the following: by how much the voltage on the diode is reduced, the regulator will increase the total current in the circuit.

There are several ways to integrate a diode. One of the best - remotely. Take a simple toggle switch and install it somewhere convenient.

Obviously, the toggle switch should be routed through the wire to the generator. You can insert the diode into the slot in the generator bridge, in the place where the wiring runs from the excitation winding to the regulator. That is, we simply insert the diode into the wiring between the bridge and the regulator.

We connect a separate toggle switch to the diode through two wires, as shown in the photo below.

When the voltage in the on-board network is sufficient, for example, in the summer, the diode is simply installed and not used. If the current is low, just turn on the toggle switch by activating the diode. In this way, we deceive the regulator.

The following diodes can be used.

Their analogues, for example, imported ones, are also suitable. They are much more compact, made of plastic (body). Domestic - metal.

Using a diode, you can provide a voltage drop of 0.9 or 1.2 volts. Thus, if the drawdown reaches 13-13.6, then approximately 1 volt will be added by the regulator. This is normal for winter loads. The standard drawdown of the regulator should be up to 13.8 volts, not lower. At this value, the battery can still charge, but if the voltage is lower, it won’t.

A drop in voltage below standard values ​​for modern calcium batteries is especially critical. The fact is that low drawdown kills such batteries; they deteriorate. Naturally, an increased voltage indicator is not recommended. It should be no more than 14.6 volts (more about this in the table at the end of the article).

Installing a diode in a circuit is a universal solution that gives good results. However, there are some important points to keep in mind:

• Observe polarity when connecting an additional diode. If you break this rule, the battery will not be charged.
• The diode must be selected so as to deliver a current of at least 5 A.
• It is advisable to install the diode outside the generator, as it will get very hot.
• Silicon diodes are considered more efficient. They are capable of taking voltage within 0.8-1.2. But germanium diodes are no more than 0.7 volts.

About regulators

Structurally, tablets that control the voltage in the generator are capable of increasing the current to 13.6 volts. It is known that there are two schemes for connecting the regulator: old and new.

The old circuit is a more reliable option, which does not increase the voltage too much, but also does not allow it to drop to critical values. But the new one - although it is completely copied from the old one, has many shortcomings.

Chronic undercharging of the battery is precisely the drawback of the new scheme. Starting the engine becomes problematic in the cold season. Owners have to install preheaters or come up with something else.

About regulators

Structurally, tablets that control the voltage in the generator are capable of increasing the current to 13.6 volts. It is known that there are two schemes for connecting the regulator: old and new.

The old circuit is a more reliable option, which does not increase the voltage too much, but also does not allow it to drop to critical values. But the new one - although it is completely copied from the old one, has many shortcomings.

Chronic undercharging of the battery is precisely the drawback of the new scheme. Starting the engine becomes problematic in the cold season. Owners have to install preheaters or come up with something else.

Poor quality regulators force the battery to absorb energy only in the summer, i.e., at above-zero temperatures. In winter, especially if you make short trips by car, the battery does not have time to warm up, at least to 0, and periodically discharges.

Experienced motorists recommend driving for at least 20-30 minutes in winter to restore the battery.

So how is the problem solved? Obviously, the best option is to increase the voltage in the on-board network, but how to do this? It is necessary to make the tablet “believe” that there is supposedly low voltage in the network. Thus, we will ensure that the gene produces the missing voltage.

Low voltage in the vehicle's on-board network can be caused by the presence of a large number of consumers. For example, if you use a powerful speaker system with a subwoofer and amplifier, voltage dips are inevitable.

Instead of a diode, you can also use special regulators that produce three voltage values, depending on the air temperature: 13.2, 13.9 and 14.5 volts. There are three modes: summer, spring/autumn and winter.

We recommend viewing the table, which shows data on the normal charge of the battery and the standard operation of the generator.

The effectiveness of the diode, which increases the voltage in the on-board network, is beyond doubt. Almost all experienced motorists and owners of domestic models do this. After this, the car will be easy to start not only in summer, but also in winter. High current – ​​accurate charging.

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Today, many car enthusiasts install various additional equipment on their cars. This can negatively affect the charging of the generator, as well as the on-board voltage of the vehicle.

The question arises: how to increase charging on the VAZ 2114 generator? This may require a lot of effort, but there is nothing overly complicated about it.

Increasing the generator charging voltage

The topic may not be new, but it is still relevant today. There are many ways to increase the battery charging voltage described online. I don’t claim authorship, but I haven’t seen this method and I want to share my experience in remaking the generator “tablet”.

As you know, in winter, when consumers are turned on, the voltage of the on-board network drops to 12.8-13.5 V and, accordingly, undercharges the battery. I went, as I believe, along the least path of resistance, by including a voltage booster in the electronic circuit of the stabilizer (tablet).

Zener diode VD1 ensures stabilization of half the excitation voltage of the generator, so when a diode is added, an additional voltage drop occurs on it, which ensures that the generator excitation voltage is turned off at a higher voltage.

Well, now how to implement all this in practice.

Take the relay regulator, drill out the rivets and remove the cover.

Carefully remove the compadum from the board, using a screwdriver or a stiff brush. The zener diode we need (for those who are not entirely familiar with radio engineering) is a glass cone with a strip. The strip designates “Minus”. We unsolder the zener diode and solder a minus to minus diode to it. We solder the resulting assembly back.

This is what happened. Next, fill everything with sealant and close the lid. Can be duplicated with screws.

When using a 1n004 diode, the charging voltage without load is 14.8 volts. With all consumers turned on, 13.8 -14.2 V.

Author; Alexander Rodin Shchelkovo, Moscow region

As you know, additional equipment is often installed on a car, which draws additional voltage from the on-board network. Thus, the voltage indicator on a VAZ-2114 can drop to a critical level of 11 volts . If you also install additional air conditioning or heated seats, this may result in the starter not having enough power to start the engine. How to fix the problem? Make sure that the voltage in the on-board network increases.

Video about increasing the voltage in the on-board network on VAZ cars:

The video will tell you how to increase the voltage of the generator and on-board network with your own hands, and will also tell you about some of the nuances and subtleties of the process

Modification of the relay regulator

Any modification to a generator set requires at least a little knowledge of electronics. To modify the “relay” for a higher battery charging voltage, you need to purchase the same relay from a foreign car with an output voltage of 14.5 volts, it is indicated on the top cover. The further order will be as follows:

• it is necessary to disconnect the native “pill” from the home relay. It is necessary to use a heated soldering iron and tweezers;
• The same procedure is done with the imported “gadget”;
• Next, you need to install an imported relay on the household brush assembly. Here you will have to work hard, since the leads do not match and they need to be bent and welded correctly;
• After this, it is firmly fixed to the body with self-tapping screws, having previously been treated with a special heat-shrink paste.
• That's it, you can install a regulating relay on the generator and check it in action, it should produce a voltage equal to 14.5 volts.

We increase the voltage - all options for solving the problem

Voltage in the on-board network after modification

So, many motorists may decide that the way out of this situation is to install a high-power generator, but at the same time they will have to replace the battery with a more capacitive one. This is done in order not to “kill” the battery that is installed on the car, since a voltage overload will lead to the destruction of the internal cells. This option is not suitable because it is too expensive.

The second option is to install an additional diode from another diode bridge or marked KD202V . This is much cheaper than changing the generator and battery, but you will have to tinker a little. To begin with, it is recommended to study automobile electrical circuits and the operation of the generator, as well as the charging circuit.

On the generator

In the second picture you can see how the diode is installed, but with such a length of wiring it is not very convenient - everything is tight. It is better to make the length of the wire about 2 cm from the diode - this way, in my opinion, it will be easier to insert into the RN connector of the generator. As far as I remember, I have a K223 diode, i.e. it's silicon. Raises the voltage by about 1.3 V.

I’ll correct myself - I checked using reference data on the Internet what the K223 diode is - I must say that I was very mistaken in indicating exactly that name. In fact, there are diodes KD223 and D223, but their housings are completely different.

However, in the photos I provided, most likely diodes D214 or D242 are wrapped in electrical tape (there may be different letters after the numbers), here is the case (M6 thread):

How to increase the voltage of a VAZ-2110 generator: increasing power

As you know, additional equipment is often installed on a car, which draws additional voltage from the on-board network. Thus, the voltage indicator on a VAZ-2110 can drop to a critical level of 11 volts. If you also install additional air conditioning or heated seats, this may result in the starter not having enough power to start the engine. How to fix the problem? Make sure that the voltage in the on-board network increases.

Video about increasing the voltage in the on-board network on VAZ cars:

Battery voltage problems in winter

How to increase the charging of the generator on a VAZ 2114 in the winter? This is another problem that concerns the cold season. The fact is that in winter the battery may not have time to warm up. As a result, it constantly discharges.

To prevent such a situation, you should warm it up to at least 0 degrees Celsius. In order to warm up the battery to the desired temperature, you should wait at least 20 minutes. At this time, you need to drive, and don’t stand in traffic jams, otherwise it won’t be of any use.

We increase the voltage - all options for solving the problem

So, many motorists may decide that the way out of this situation is to install a high-power generator, but at the same time they will have to replace the battery with a more capacitive one. This is done in order not to “kill” the battery that is installed on the car, since a voltage overload will lead to the destruction of the internal cells. This option is not suitable because it is too expensive.

The second option is to install an additional diode from another diode bridge or marked KD202V. This is much cheaper than changing the generator and battery, but you will have to tinker a little.

To begin with, it is recommended to study automobile electrical circuits and the operation of the generator, as well as the charging circuit.

The best way to increase tension with your own hands

How to increase the voltage of the VAZ 2114 generator? There is one option that can be called the simplest. Its main disadvantage is its high cost. In particular, you will have to part with a large sum of money just to purchase a generator with increased power.

You will also have to purchase and replace the battery. It should be more capacitive. Otherwise, a voltage problem may occur. As a result, this will cause the complete destruction of the internal cells.

Additional Information. Despite the effectiveness of this method, it is very expensive, so it is unlikely to be suitable for most car owners.

Electrical diagrams and indicators

To increase the voltage even more, at least to 14 volts, it is necessary to install a diode in circuit D, the voltage regulator. Any diode with a breakdown voltage of 20V and a current of at least 5A is suitable. The voltage drop is preferably no more than 0.6-0.7V. The 2D219B diode is excellent.

Let's look at the circuit diagrams of diodes:

How to increase on-board voltage

It should also be noted that the battery begins to absorb energy (charge) only when its temperature is above zero. Therefore, in winter, if you make short runs and the battery does not have time to warm up under the hood to at least zero (plus charging time), it will be constantly discharged. And soon it will die... It is believed that after starting the engine, in order for the battery to recover, you need to drive for at least 20 minutes. Just go, and not stand in traffic jams! How to increase the voltage in the network?

Very simple! It is necessary to make the regulator “think” that we have low voltage in the network. Thus, the generator will give us the missing volts. A diode will help us do this. In a generator with a built-in voltage regulator, you need to place a diode in the circuit, as shown in the figure.

Diode insertion Observe polarity. There is no crime here, it’s just that if the polarity is not observed, charging will not happen. The diode must be designed for a current of at least 5 A. By the way, it will get very hot, so it is better to install it on a radiator. What should you consider when selecting the type of diode? Voltage drop on diodes: germanium - 0.3...0.7 V, silicon - 0.8...1.2 V. I.e. This is the voltage by which your on-board network will increase. Therefore, by selecting it is possible to achieve the “right” voltage in our network.”

On the generator The second picture shows how the diode is installed, but with such a length of wiring it is not very convenient - everything is tight. It is better to make the length of the wire about 2 cm from the diode - this way, in my opinion, it will be easier to insert into the RN connector of the generator. As far as I remember, I have a K223 diode, i.e. it's silicon. Raises the voltage by about 1.3 V. I’ll correct myself - I checked using reference data on the Internet what the K223 diode is - I must say that I was very mistaken in indicating exactly that name. In fact, there are diodes KD223 and D223, but their housings are completely different. However, in the photos I provided, most likely diodes D214 or D242 are wrapped in electrical tape (there may be different letters after the numbers), here is the case (M6 thread):

Manufacturing and installation of a diode in a VAZ-2114 generator

Now that everything is ready, we install an additional diode, more powerful than the previous one. You will need half a meter of wire 2*0.75mm. We solder the ends to the female and male terminals No. 4. We dress them in cambric, or better yet, in heat shrink. By the way, the old one must be removed from the system. Let's take action:

1. Now, solder the following circuit to the diode: mother to the cathode, folder to the anode.
2. We insulate the diode. For example, we take a film container.
3. We remove the “minus terminal” from the battery.
4. We unscrew the “+” wires from the generator, disconnect the “D” wire to the tidy.
5. Remove the generator cover.
6. Through the slots in the cover, we connect the “mother” to the LV, the “father” to the standard wire.
7. We carry out the assembly.

Now, everything is ready for the final check and measurements.

conclusions

Increasing the voltage of the VAZ-2114 generator with your own hands is real and quite simple. At the same time, the cost amounted to 500 rubles. It is worth noting separately that if you do not have the necessary skills or abilities to work with automotive electronics, then you should contact a car service center, where everything will be done quickly and efficiently, and of course, at the expense of the car enthusiast.

If you find an error, please select a piece of text and press Ctrl+Enter.

Today, many car enthusiasts install various additional equipment on their cars. This can negatively affect the charging of the generator, as well as the on-board voltage of the vehicle.

The question arises: how to increase charging on the VAZ 2114 generator? This may require a lot of effort, but there is nothing overly complicated about it.

The first thing to do is determine the level of additional voltage on the on-board network. Most often, problems arise due to some additional equipment. In some cases, the voltage reading may drop to 11 V. This is extremely low.

If after this you install heated seats or install a new powerful air conditioner, then the starter will not have enough power to start the engine. In order to fix this problem, you need to somehow increase the voltage in the car's on-board network.

Final voltage measurements and results

After the installation was completed and the entire electrical circuit was working, voltage measurements were made at idle speed of the running engine. The results surpassed themselves; the voltage in the entire electrical circuit increased.

Let's consider a table of the results of the measurements obtained:

When and why do you need to increase the voltage of the on-board network?

To answer these questions, you first need to find out what voltage the on-board network should be in general. What is considered the norm, and what are the risks of deviation from it? And to do this, you need to remember what this very tension affects.

The most important thing in this case is that the voltage of the on-board network determines how fully the battery will be charged from the generator. In order for the charging process to begin, in theory it is enough to apply a voltage to the battery that exceeds its own. Due to this, a current will flow through it, due to which an electrochemical reaction will occur, and a charge will begin to accumulate on the lead plates. However, this condition is sufficient only to begin the charging process.

In order for the battery to accumulate as much electrical energy as possible, a certain voltage must be supplied to it. In the case of 12-volt car batteries, it should be 14.4 V. If this voltage is applied to the battery terminals for a long enough time, it will accumulate the maximum amount of energy. Indicators of this state are a density in the region of 1.26 units, and a charge current tending to zero.

What happens if the above voltage is applied to the battery terminals after it is fully charged? The electrolysis reaction of the water contained in the electrolyte will begin. It will decompose into its constituent components and evaporate irrevocably. In such cases, they say that the battery is boiling, after which it becomes necessary to add distilled water to it.

It follows that a constant voltage of the car’s on-board network of 14.4 V will inevitably lead to a boiling of the battery when driving for a long enough time. If the voltage is kept even higher, the electrolysis process will begin much faster, that is, during a shorter trip.

On the other hand, if the battery is supplied with a lower voltage, it will not be able to fully charge, even if you drive the car indefinitely. It will, of course, charge, but not 100%. In such cases, motorists use the phrase “undercharged battery.” This is also not good. As a result of regular undercharging, the battery life is reduced, and the risk of not starting the engine after a long period of inactivity increases.

Accordingly, in order for the car’s battery to “feel good”, it is necessary to maintain a voltage in the on-board network at which it will be charged as fully as possible, and never boil. That is, we need some kind of golden mean . And this is the on-board voltage of 14.2 V. Under such conditions, the battery will be charged almost completely, but will not be brought to a boil.

It should also be noted that a car's on-board voltage of 14.2 V is considered normal only under certain temperature conditions. Namely at temperatures ranging from 0°C to +20°C. If, for example, it is frosty outside, then for normal charging of the battery it makes sense to supply it with a higher voltage - 14.5-14.7 V. During the summer heat, on the contrary, it will be better if the charging voltage does not exceed 14 V.

As a result, we received answers to the questions posed at the beginning. The on-board voltage needs to be increased when it is lower than needed to fully charge the battery. This must be done in order not to operate the battery in chronic undercharging mode. As a rule, owners of cars from the domestic automobile industry, as well as foreign cars of a “respectable age,” often encounter such problems.

Is it worth increasing generator performance at all?

It is quite easy to verify that the generator has a small performance reserve, because if an additional device that is not included in the basic package is installed in the machine, the part will begin to work intermittently. You can give an example. In the summer heat with the air conditioning, low headlights and car radio on, the battery may not be able to withstand heavy loads, which will lead to the generator malfunctioning.

There are two ways to solve this problem:

1. Buy a new unit.
2. Increase the voltage yourself.

Purchasing a new device will require a considerable amount of personal savings, and money will also be needed for installation and connection.

But if you modernize the unit yourself, the financial savings are obvious, especially since this process is carried out quite simply if the car owner adheres to effective recommendations.

Method No. 5. Remote three-level voltage regulator

Installed instead of the standard one. It consists of a brush assembly and a remote relay, which is mounted in any convenient place under the hood (or even in the cabin). The regulator has a three-position toggle switch, by switching which you can influence the voltage supplied by the generator. As a result of its installation, you can set the on-board voltage to 14.7 V, 14.2 V and 13.8 V. The middle mode is considered normal, the first for winter, the last for summer. The device is very useful if you don’t forget to switch the toggle switch to the appropriate position in a timely manner. At the time of writing, it costs about 300-400 rubles.

How, in theory, can you increase the voltage in the on-board network?

To answer this question, you need to know something about this very on-board network. How does it work, what does the voltage in it depend on? To find out, there is no need to study the entire on-board network. It is enough to consider the node that is responsible for generating electricity and stabilizing it.

The generator does this. It generates electricity to power consumers and charge batteries, and also provides stable voltage regardless of rotation speed.

In simple words, this is how it works. In order for a generator to generate electricity, an electromagnetic field is forcibly created in it. The strength of this field determines the output voltage (which goes to the battery and consumers). The electromagnetic field is created in the generator rotor, to which a constant voltage is supplied through the brush assembly. The strength of the electromagnetic field and, accordingly, the voltage of the on-board network depend on the magnitude of this voltage.

That is, in order for the network to have the required voltage, control voltage must be supplied to the brush assembly of the generator. The voltage regulator relay is responsible for this. In its simplest form, it is a device that “monitors” what the generator outputs and “decides” what control voltage to apply to excite the electromagnetic field. As a result, it turns out that no matter how fast the generator rotates, it always outputs the same voltage to the network.

Accordingly, in order to increase the voltage of the on-board network, it is necessary for the voltage regulator to supply a higher voltage to the brush assembly of the generator. This can be done in several ways, which are described below.

It is worth adding here that the on-board voltage depends not only on the generator and the relay regulator. After all, in addition to the fact that electricity must be generated, it must also be delivered to consumers, which include batteries. Accordingly, if there are losses along the delivery route, then not all generated voltage will reach consumers. Therefore, increasing the on-board voltage should start with this.

Method No. 7. Generator

If the generator is not capable of delivering the desired 14.2 V without significant drops under load, then none of the methods described above will help correct the situation. Unfortunately, in garage conditions it is quite difficult to check this unit, so this matter should be entrusted to specialists.

If, nevertheless, you really want to try it yourself, then you can measure the resistance of all stator and rotor windings. If the generator is working properly, there should be no noticeable scatter in the device readings. If it is, or the resistance of any of the windings tends to zero (or there is a break), then the generator is finished. Trying to get the desired voltage from it is useless.

Results

The on-board voltage is a very important parameter of the car. If it is below normal, the battery will constantly be undercharged, the light will shine dimly, the radio will turn off under load, and so on. There are several ways to increase voltage. All of them have been tested in practice and work great.

Source

How to excite a generator

What is required to excite the generator? As mentioned earlier, the first step is to remove the “chocolate”, since the cause of the breakdown lies in it. Then the positive contacts on both devices are connected, and the negative ones in the regulator are cut and connected to the “ground” of the brushes.

Insulate the wire at terminal “30” of the generator. Connect an indicator of at least 15 watts to output circuit “15”. This applies to generators of the G222 series. On other models of units, excitation is carried out by connecting to terminal “B”.

Generator self-excitation circuit.

The diagram shows diodes that are found only on modern types of generators; they are not present on earlier versions. It would be more correct to say that a circuit that does not have these diodes is classic, but one with them is newer.

Some generator models have armature brushes in their design. They also need to be removed and the tablet drilled out. One of the contacts is connected to the plus of the armature through a diode, the second - to the minus.

The current does not begin to flow immediately, but only after reaching a certain number of revolutions. Based on the tachometer readings, it can be determined that the feed will start only after 4 thousand revolutions per minute. That is, if we accelerate the engine to 4,000, the voltage appears, and if we reduce the speed to 1,000, the voltage will disappear. This is the principle of current generation during self-excitation.

Some car brands have a low-speed power plant. In this case, to increase the initial rotation speed, you will have to do something to the pulley. There shouldn't be any problems with regular engines.

A few words about its structure

The generator set of this car is a fairly reliable device that can withstand vibration loads and temperature changes in the engine compartment. She is also not afraid of moisture and dirt getting in while driving. Its performance should be stable at any engine speed.

Requirements for the generator:

• The strength of the current generated by the device must be such as to prevent the battery from being discharged, but to be recharged to the required level regardless of the connected consumers;
• Regardless of the engine speed and fluctuations in current consumption, the stability of the on-board voltage must be ensured.

It is an electrical machine that converts rotational motion from the engine crankshaft into constant voltage to recharge the battery. Its body consists of two halves, front and back. The back cover is responsible for attaching a brush assembly with a relay-regulator, a diode bridge, and terminals for connecting consumers of the generated electric current.