Car generators don t generate electricity? How to repair?

The specific inspection method is as follows: 1. First of all, when the engine is running, see if the generator can be driven by the generator pulley. 2. If the operation is normal, remove the positive pole of the battery, if the car turns off immediately, it means that the generator may not generate electricity.

3. If the flame is not turned off, measure the voltage between the positive output terminal of the generator and the ground, add the gas pedal, change the speed, and see if the voltage fluctuates, if the voltage fluctuates, and the voltage is about 12V, the generator is normal, otherwise the generator has a problem. 4. After judging that there is no problem with the generator, measure the output voltage of the voltage regulator in the running state (note: it is also necessary to remove the positive pole of the battery), if there is voltage, it means that the output voltage of the generator and the regulator is normal.

5. Otherwise, check the charging line, look at the fuse, plug and socket connector, etc. The car generator is the main power source of the car, and its function is to supply power to all electrical equipment (except the starter) when the engine is running normally (above idle), and at the same time charge the battery.

It is generally caused by damage to the generator regulator.

Check the voltage of the two poles of the battery when the engine is running, it should be, if it is lower than 12V, it must be the engine or charging line is abnormal, directly check the voltage of the generator pile head, if it is still so, it is determined that the generator is damaged.

Maintenance method: When the engine is idling, use a universal meter to measure whether the 3 output terminals of the generator have a 12-14 volt AC voltage to the ground wire? If not, it is a generator coil problem, if there is voltage, you can rule out the generator problem, continue to check in the back to see if the 6 diodes are broken.

Generator does not generate electricity maintenance method: use a multimeter.

For voltage level detection, turn the multimeter Mori orange knob to direct current.

Pressure 30V gear, connect the red watch pen to the generator armature column, and the black watch pen to the shell, so that the engine runs above medium speed, the voltage standard value of the Chang 12V electrical system is about 14V, and the voltage standard value of the 24V electrical system should be about 28V. If the measured voltage is the battery voltage, it means that the generator does not generate electricity.

How car generators work.

When the external power Wumu Road electrifies the excitation winding through the brush, a magnetic field is generated, so that the claw pole is magnetized into N pole and S pole. When the rotor rotates, the magnetic flux.

Alternating changes in the stator windings, and according to the principle of electromagnetic induction, an alternating induced electromotive force is generated in the three-phase windings of the stator.

This is how the alternator generates electricity.

The rotor of the synchronous generator with DC excitation is dragged by the prime mover (i.e., the engine) to rotate at a speed n (rpm), and the three-phase stator induces alternating current around the resistance.

Force. If the stator winding is connected to the electrical load.

The motor has an alternating current output, which converts the alternating current into direct current and outputs it from the output terminal through the rectifier bridge inside the generator.

Generator for the car in the Vapor SectionThe method of repair without power generation is as follows:

1. When you find that the belt has abnormal noise and slippage, you can check whether the wear of the belt is normal, whether there is any breakage, and you can re-tighten the belt or replace the belt;

2. Check whether the output line of the generator is open or abnormally worn, and if there is an abnormality, the line can be replaced;

3. Manually try the rotation smoothness of the rotor, if the rotor is stuck and cannot generate electricity, it can be removed and replaced;

4. Use a multimeter.

Test whether the resistance of the coil meets the normal value, if not, you can rewind the coil or replace it with a new generator.

Car generator does not generate electricity maintenance precautions

Key points of overhauling automobile generators: the connecting bolts (females) of each part of the generator should be tight and reliable, and the wires should be in good contact to avoid loosening and falling off and affecting the work. Generator positive diode.

Press-fit on the component board, and the negative diode press-fit on the generator housing, and the two must not be installed incorrectly. When press-fitting the diode, its tightness should be appropriate, and the diode will be easily damaged if it is tightened, and it will cause flashover.

When installing and replacing the battery, strictly keep the negative pole tie iron, and the polarity of the generator must not be reversed, so as not to burn out the diode. In the maintenance, the fire test method and the short circuit method and the megohmmeter shall not be used.

Check to prevent damage to the diode.

Each line post is not allowed to loosen to prevent poor contact or instantaneous overvoltage and burn-out diode. The generator should be regularly maintained according to the technical specifications, and the fault should be repaired and eliminated in time, and the wiring of the generator and the regulator should be kept intact, the installation should be firm, and the negative electrode should not be mistaken.

Jian Huisheng repaired its fault with the operation method of the positive block to avoid man-made damage to the parts.

Pacific Automobile Network] Repair method for car generator not to generate electricity: 1. You can use a multimeter to measure the resistance value of the coil, if there is no resistance value, you must re-circle or replace the generator. 2. If there is an open circuit in the output wire of the generator, and the wire is in good condition, it should be repaired.

3. If there is a stuckness in the ** part, manually try whether the operation is easy.

Car generators do not generate electricity, usually due to damage to the internal rectifier diode, if the diode is damaged, the faulty diode can be cut off, and it can continue to be used.

If the age is up, the generator must be replaced.

If the generator output wire has an open circuit, and the wire is in good condition, it is necessary to repair, if it is the first part of the stuck phenomenon, manually try whether the operation is easy, if the wire package is damaged, you can use a multimeter to measure to see the coil resistance, if there is no resistance value, you need to re-circle or replace the generator.

Working principleThe working principle of the integral alternator When the external circuit energizes the excitation winding through the brush, a magnetic field is generated, so that the claw pole is magnetized into the n pole and the S pole. When the rotor rotates, the magnetic flux changes alternately in the stator winding, and according to the principle of electromagnetic induction, an alternating induced electromotive force is generated in the three-phase winding of the stator. This is how the alternator generates electricity.

The synchronous generator rotor of the DC excitation is dragged by the prime mover (i.e., the engine) and rotates at a speed n (rpm), and the three-phase stator induces the alternating current potential around the resistance. If the stator winding is connected to the electrical load, the motor has an alternating current output, and the alternating current is converted into direct current through the rectifier bridge inside the generator and output from the output terminal.

The alternator is divided into two parts: stator winding and rotor winding, the three-phase stator winding is distributed on the shell according to the electrical angle of 120 degrees different from each other, and the rotor winding is composed of two pole claws. When the rotor windings are connected to direct current, they are excited, and the two pole claws form the n pole and the s pole.

The magnetic field lines start from the n-pole, enter the stator core through the air gap, and return to the adjacent s-pole. Once the rotor rotates, the rotor winding will cut the magnetic field lines, and a sinusoidal electromotive force with an electric angle of 120 degrees between each other is generated in the stator winding, that is, three-phase alternating current, which is then converted into a DC output through the rectifier element composed of a two-pole chaotic light tube.

When the switch is closed, the battery first supplies the current. The circuit is: the positive pole of the battery, the charging indicator light, the regulator contact, the excitation winding resistance, the iron and the negative pole of the battery. At this time, the charging indicator light will be on due to the current passing through it.

However, after the engine starts, as the speed of the generator increases, the terminal voltage of the generator also increases. When the output voltage of the generator is equal to the battery voltage, the potential of the "B" and "D" ends of the generator is equal, and at this time, the charging indicator is extinguished due to the zero potential difference between the two modes.

Indicates that the generator is working normally, and the excitation current is supplied by the generator itself. The three-phase AC electromotive force generated by the three-phase winding in the generator is rectified by the diode, and the direct current is output, which supplies power to the load and charges the battery.

Photo by Pacific Automobile Network Q&A).

There are many reasons why the generator does not generate electricity, if we are not very familiar with the circuit or have poor hands-on ability, we can go to a professional repair shop or 4S shop for maintenance.

1. When you find that the belt has abnormal noise and slippage, you can check whether the wear of the belt is normal, whether there is any breakage, and you can re-tighten the belt or replace the belt;

2. Check whether the output line of the generator is open or abnormally worn, and if there is an abnormality, the line can be replaced;

3. Manually try the rotation smoothness of the rotor, if the rotor is stuck and cannot generate electricity, it can be removed and replaced;

4. Use a multimeter to test whether the resistance value of the coil meets the normal value, if not, you can rewind the coil or replace it with a new generator.

The maintenance method of the generator not generating electricity is to change: 1. Do not disassemble the generator, test it on the car, and judge whether the ear is faulty; 2. Use the multimeter voltage block detection; 3. When there is no ammeter on the balance board of the automobile instrument, an external DC ammeter is used to detect. The role of the generator is:

When the engine is running normally, power is supplied to all electrical equipment except the starter, and the battery is charged at the same time. The generator is the main power source of the car, and its working principle is: when the external circuit energizes the excitation winding through the brush, a magnetic field will be generated, and at the same time, the claw pole will be magnetized into the n pole and the S pole.