Original poster, it is normal for the generator to generate heat during operation. Typically, during normal operation, the surface of a generator will become hot to the touch within a few minutes. When the generator runs at 3000 rpm and runs for about 30 minutes, the temperature rise reaches the highest value (about 130 degrees). plus the ambient temperature), the surface temperature is about 160 degrees and the highest temperature can reach 200 degrees Celsius), so the surface of the generator will be hot to the touch. According to the requirements of QC/T 774-2006, the regulating voltage value of the regulator is 14.5~0.25V. However, due to price problems of generators sold in the domestic market, the quality of the regulator is not very reliable. Many regulators are produced. Products produced by manufacturers cannot meet the requirements of national standards, dSo the output voltage of many motors cannot reach 14.5-0.25V.
1. Leave the generator running and use a voltmeter to test the battery. The voltage reading at this time should be around 13 volts or a little more if different speed changes cause the voltage to fluctuate. between 13 and 14 If the voltage remains the same or decreases, then the generator is indeed defective.
2. Start the engine, turn it off after a few minutes and touch the generator. If the generator is very hot, the bearings may have worn out or the insulating copper windings may have been damaged, indicating. that the generator will soon be out of service.
3. Turn on the radio and start the engine. If the radio vibrates or the sound quality is fuzzy every time you step on the accelerator, there is probably a problem with the generator.
4. When the car does not start, use an electric meter to measure the numero V of the battery and save it. Then start the car, use the meter to measure the battery V number and record it. If the car's alternator is not broken, the battery's V number will be higher when the car is started. Around 13.7V, depends on the car. But it will definitely be higher than the V number where the car will not start. The most obvious thing is that if the generator fails and the car is driven for 2-3 days, the battery will lose power and the car will not be able to start on electricity.
5. Turn on the car headlights, check the brightness of the lights, then start the car. The lights will dim and the car will start. Check the headlight brightness, then increase the throttle and check the brightness. If there is not a big difference between the lights before starting and after starting, it means the generator is not working. If they readLights before and after starting reflect and become very bright, then the generator is working fine but the battery is defective.
The generator does not operate according to the specified technical conditions. If the stator voltage is too high, iron loss increases; the load current is too large, the copper loss of the stator winding increases; low, causing the cooling fan speed to slow down, affecting the heat dissipation of the generator; the power factor is too low, which increases the rotor excitation current and causes the rotor to heat up. Check whether the monitoring instrument indication is normal. If this is abnormal, necessary adjustments and treatments should be made to operate the generator according to the specified technical conditions.
References:
Car generator-Baidu Encyclopedia