How to judge if the external regulating generator does not generate electricity to know whether it i

1.Take the shake meter to test the insulation of the generator output main line 3-phase, 4-wire or 2-phase to the ground, if it is 0, the main fundamental coil of the generator is burned or the water is damp. If there is no problem with ground insulation, it should be more than 2 megaohms, which is generally the maximum.

Then take a milliohmmeter or a bridge to test whether the DC resistance of the 3-phase is the same. If it is not the same, it may be a short circuit between the turns of the coil

When the water is damp, it should be bakedShort circuit burns out to repair the coil.

2.Separate the outlet of the harmonic winding from the regulator and detect the insulation of the stator excitation coil to the ground.

If all of the above is a problem. Then connect the outlet of the harmonic winding with the regulator. Boot up and experiment.

Take a multimeter to measure the output voltage of the regulator, and open the throttle to measure how much v. it is

Whether it is consistent with the excitation voltage on the generator nameplate (there is a certain error, but the error is not particularly large), if there is no output, the regulator will fail.

Also check if the carbon brushes are in good contact.

You can also try to magnetize it, because the rotor core of the generator that is not used for a little longer will lose magnetism.

12V battery alignment carbon brush with 2 leads generally one is red one is black red is the positive electrode and the black is the negative electrode, take the battery wire and align it with the positive and negative electrodes (must correspond to the polarity of the positive electrode and the negative electrode to the negative electrode), contact for 5 secondsIf it loses magnetism, it can generate electricity right away.

Take an iron screwdriver close to the generator rotor (armature) and feel if the magnetic force is normal. If the magnetic force does not generate electricity normally, check the generator. If the magnetic force is not normal, check the regulator and rotor circuit.

I'm repairing a car generator, if you're talking about a car generator, you can connect the magnetic field of the regulator with the power + this piece, if the power is generated, the regulator is broken, and if you don't generate electricity, the generator is broken, 2Use a wire (the magnetic field is an internal iron) from the 12V or 24V positive electrode directly to the magnetic field binding post of the generator, if the power is generated, the generator regulator is broken, if the power is not generated, the generator is broken (at this time, the magnetic field line of the regulator is removed from the magnetic field terminal of the generator).

If the damage to the generator regulator is not serious, it can be repaired by replacing the accessories. But if the copper winding in the generator burns out, it is recommended to replace it directly.

The damage determination method of the generator regulator is as follows:

1. Use a multimeter to measure the battery voltage before and after the vehicle starts. Generally, when the generator is working normally, the voltage reading of the battery is generally between 13V-14V.

2. Feel the working temperature of the generator. If the temperature of the generator is very high after the engine has been running for a while, a failure may have occurred.

3. Observe whether there is abnormal sound or jitter when the generator is working. If this is the case, it may be that the tensioner or bearing of the belt is faulty.

Of course, this is just an easy way for us to judge the fault ourselves. If you want a more accurate judgment, it is best to find a professional repair shop or 4S shop for inspection.

Because the cost of replacing a generator is not particularly high, if you take the method of replacing internal parts, it will not only take time to replace a new generator, but only part of the parts, so it is a bit redundant.

Generator Regulator Fault Phenomenon:

1. The generator does not generate electricity, and the battery indicator on the instrument is on. Generator failures are usually caused by breakdown of FETs or Darlington tubes inside the regulator.

2. The power generation is too high, resulting in easy damage to the battery, and it will be difficult to drive when the voltage is lower than 10V after the battery is damaged. Too much power generation leads to battery overshoot, affecting battery life.

3. The generator regulator is damaged and cannot generate electricity, which affects the performance of the vehicle, the acceleration is weak, and the fuel consumption is low.

The function of the regulator on the generator is to control the output voltage of the generator in a stable range, because the speed of the generator and the engine changes according to the actual situation. In order to prevent the voltage of the generator end from changing due to excessive changes in engine speed, the voltage of the electrical equipment that can be used is relatively stable, and the voltage value is kept at a certain level of the rated value.

As an important part of the continuous power supply of the power supply equipment in the car, the generator will reduce the battery life if it fails, and in serious cases, it will also cause the engine to be unable to get on the car.

It can be detected by professional instruments, judged by the connecting column of the regulator, and judged by the elimination method; After that, you can go to a 4S shop or repair shop for repairs.

It can be judged by adjusting its own switch, by the appearance of the regulator, by the adjustment function of the regulator, and by the action of the regulator. The regulator of the generator can be replaced directly.

Test with a universal meter, determine by the number of battery voltage, determine by temperature, and judge according to the sound jitter, you can change to a new one and replace the accessories.

1. Symptoms of a broken generator regulator: 1. The generator does not generate electricity, and the battery indicator light on the meter is on. Generators that do not generate electricity are usually caused by breakdown of the FET or Darlington tube in the voltage regulator.

2. Qingyuan silver's power generation is too high, which leads to the consequence that the battery is easy to be damaged, and the voltage is less than 10V after the battery is damaged, it will be difficult to get on the car. Too high power generation leads to overcharging of the battery and affects the life of the battery. 3. The damage of the generator regulator will affect the performance of the vehicle after not generating electricity, and the acceleration will be weak and the fuel consumption will increase.

2. Damage judgment method of generator regulator: the regulator will have three binding posts, one is the positive pole and the other is the negative pole (lap iron), and the other is the magnetic field binding post. Test Lighting Method:

The positive pole is connected to the positive pole post of the regulator, the lap iron is connected to the regulator tie pole, and the magnetic field pole can be connected to the carbon brush using a wire, and the other carbon brush is connected to the iron. Use the test lamp to test whether the carbon brush has electricity, the bulb is bright to indicate that the generator regulator is normal, and if it is not lit, it is broken.

Connect the + and F of the regulator with a wire, start the engine, and see if the ammeter has a charging current.

Check whether the ammeter has a charging current, if there is a charging current indication, you can confirm that the regulator is broken, remember that the speed of the generator should not be too high.

This is the breakdown damage of the electronic regulator, if the bulb in the tube is not lit in the car, it means that the internal components of the electronic regulator are broken, the car generator is not charged at this time, if it is with a charging indicator light, the indicator line will be found and connected, it will be extinguished with the voltage increase, otherwise the electronic regulator is damaged.

According to the judgment experience of the generator electronic regulator, it is best to have an adjustable DC regulated power supply, to output DC 0---15V adjustable, output 5A on the line, when using, first find out the power input end and lap iron end of the electronic regulator to be tested, and then find out the two wires connected to the carbon brush excitation, connect the power supply to the stabilized power output, connect the two wires of the carbon brush excitation to a car bulb, and then slowly adjust the stabilized power supply, when the car bulb should gradually light up, When the voltage is adjusted to about 14V, the bulb should be off, not extinguished but brighter, this is the generator charging current is very large, this is the breakdown damage of the electronic regulator, if the tube is not lit in the car, it means that the internal components of the electronic regulator are broken, the car generator at this time is not charged, if it is with a charging indicator, find out the indicator line and connect it, it will be extinguished with the voltage increase, otherwise the electronic regulator is damaged.

.Regarding the car regulator, it is necessary to first understand its basic knowledge, and then according to the actual design principle of the generator or the physical sample of the regulator, and then wiring, so that it is not difficult to find the answer.

Classification composition: relay type and electronic type. A regulator generally consists of three relays:

One is responsible for regulating the output voltage;

One is responsible for preventing the charging current from being excessive;

One is responsible for cutting off the charging circuit when a countercurrent occurs, and the relay action cuts off the charging circuit when a countercurrent occurs.

Function and Principle:

Assist generator work. When the car is running normally, the engine speed changes in a large range, and at this time, because the transmission ratio between the generator and the engine is fixed, the speed of the generator is large and small, which will have an impact on the output voltage of the generator. In order to keep the voltage output by the generator in a certain range at different speeds, and can be automatically adjusted with the change of the generator speed.

.These need to be used as a regulator to adjust the output voltage in due course as a guarantee.

Whether the regulator works normally is very important to ensure the normal operation of the entire automotive electrical system and to extend the service life of the automotive electrical equipment, and its output voltage (or charging voltage) has a great impact on the service life of the battery.

Example: Take a five-wire regulator as an example: (the specific wiring or sequence is subject to the actual product).

One: power supply (b), controlled by the ignition switch is also equivalent to the induction line that monitors the size of the generator's power generation, and the current coming out of his voltage high regulator is small, and vice versa.

Second: tie wire (e), the regulator also has a live wire and tie wire like other electrical appliances to ensure that the circuit works normally.

Three: neutral point (N), connected with the neutral point binding post on the generator, the voltage of the generator is half of the power generation voltage when the generator is working normally, which is used to control the charging indication part (lamp).

Four: charging indicator cable (L). Needless to say, you can see the battery light icon when you turn on the key.

Five: magnetic field (f), so that the generator has a magnetic field current, and then generates electricity.

Judgment: First, the generator does not generate electricity, there is no power at the magnetic field end of the test lamp, and the regulator F has no electricity, but B has electricity, and E is normal, so it is very likely that the regulator is broken and needs to be replaced.

The second is that the generator generates too much electricity, sometimes more than or even higher, which is likely to be the regulator broken and needs to be replaced.

Car generators? Or is it another generator?

I understand that you mentioned the regulator later, it should be an alternator for cars, right?

Simply tell if the regulator is damaged, you can.

Turn on the ignition switch to the ignition position, and the engine does not need to start;

Find a screwdriver (preferably non-magnetic) or a flat wrench on the shaft side of the generator near the belt pulley to feel the magnetism, if it is easy to be sucked, or magnetic, you can basically determine that the regulator is not broken, otherwise, the regulator is more likely to fail.

If the magnetism exists, it can be basically determined that the excitation circuit is normal, and then check whether the generator generates electricity to start the engine, make the idle run, turn off the vehicle lighting, sound and other equipment, it is best to operate during the day and by professional personnel, use a universal meter to measure the output of the generator, usually the red meter rod is connected to the thickest binding post of the generator, black lap iron (on the vehicle chassis or engine block, pay attention to the influence of paint insulation), measure the current voltage, slowly increase the throttle (throttle) opening, and observe whether the multimeter reading changesIf the voltage value of the multimeter increases with the increase of the throttle opening, it can basically prove that the generator is normal, check the connection line and fuse of the battery.

Good luck!

To know whether there is electricity coming out, you check whether the line pile has electricity, whether the voltage is enough, and the external regulator is to adjust the voltage.

Sometimes the car generator doesn't generate electricity, and we think the generator is good. First of all, if the engine is broken, the first thing to do is to check if the generator regulator is good. Let's share the symptoms of a broken generator regulator for the overall situation.

Automobile generator regulator function.

The role of the engine is to protect the battery, and the battery is the charging protection device of the battery, so as not to overcharge and affect the life.

When the rotor of the alternator is rotated by the engine through a belt, the engine speed changes from a minimum of about 800 rpm to a maximum of about 6,000 rpm. Therefore, the speed of the alternator rotor varies very widely, which will cause the output voltage of the alternator to vary greatly, which cannot meet the working requirements of automotive electrical equipment. In order to meet the requirements of constant voltage for electrical equipment, the alternator must be equipped with a voltage regulator to keep its output voltage substantially constant under all engine conditions.

The principle of the generator is that there is a detection circuit inside the regulator. When the battery voltage is higher than the set value (generally 14V or 28V), the switch tube is disconnected and the generator excitation coil stops supplying power. The generator can only run idle (stop generating electricity) without an excitation current.

When the voltage is lower than 12V, the switch tube is turned on, and the generator obtains the excitation current and generates electricity. When the engine speed changes, the regulator can automatically change the current of the excitation coil, so that the output of the engine is relatively stable.

How can you tell if a car generator electronic regulator is broken?

The regulator has three positions. One is the positive pole, one is the riding pole, and the other is the magnetic field pole. Test Method:

The positive pole is connected to the positive pole of the voltage regulator, and the ground is connected to the voltage regulator riding pole. The other is connected to the carbon brush with a wire and the other is grounded. Test whether the carbon brush has electricity with a test lamp.

If the bulb is not on, the regulator is broken.

The generator regulator is broken.

To judge the quality of the regulator, method 1, the generator does not generate electricity, and there is no electricity at the magnetic field end measured with the test lamp. Regulator F also has no electricity, but B has electricity and E is grounded normally. That is, the regulator is ready and replaced.

2.The generator's generating capacity is too large, more than or even higher, and is generally a regulator. Well, swap it out.

Measuring the power output of the generator with a voltmeter is about normal. If it is too high, the regulator is damaged. If the bulb burns frequently, in addition to the high battery temperature, fast electrolyte consumption and other problems, you can't find any other questions to ask Minla. The bridge rock regulator is broken.

The above has given you an introduction to the working principle of a generator regulator. Generator regulator has symptoms of failure. This little device has a big effect. Friends who have a car must know more about these knowledge when using it, so as to eliminate car problems faster.