Method to detect car generatornot producing electricity: use amultimetervoltage block to test, turn the knob of the multimeter to the 30V DC voltage block, and turn the red. The test leads are connected to the generator armature terminal and the black test leads are connected to the case. Let the motor run above the standard voltage value of 12 V electric. The system should be around 14V, and the standard voltage value of 24V electrical system should be around 28V. If the measured voltage is the battery voltage, it means the generator is not producing electricity .
A generator refers to a mechanical device that converts other forms of energy into electrical energy. A general generator converts the energy contained in various primary energy sources into mechanical energy through a prime mover and then. generatesand electricity. The machine converts it into electrical energy and sends it to various energy consumption locations via energy transmission and distribution networks.
The reason why the car generator is not charging
The cause of the fault: the “magnetic field” terminal of the generator is grounded; the wiring is incorrect, the battery is shorted; circuited;
Fault Diagnosis: 1. Check wires for wiring errors. Start the engine, run it at medium speed and remove the wire from the regulator terminal. If the ammeter still shows a charge, this means that the magnetic field terminal of the generator is grounded and its insulation must be ensured. If the ammeter indicates discharge, check and replace it. regulator.
2. For a charging system equipped with a contact voltage regulator, when the motor is running at medium speed, reduce the elastic forceof the regulator spring. If the charging current decreases, it means the original spring. the tension is too high. Debugging needs to be done; If the charging current is still large, the regulator should be removed and the affected parts inspected.
3. After the above inspection, all components are normal and the battery should be checked for internal short circuit faults.
Generator not charging?
There are about 7 common reasons:
1. The regulator is damaged.
2. The magnetic field coil is broken.
3. The brush is stuck or the slip ring has poor contact.
4. There is an open circuit between the instrument fuse and the generator.
5. The generator drive belt is loose.
6. The diode board is burnt out.
7. The rotor coil is shorted or open. This is due to the fact that the field currentmagnetic of the generator is too great. Is the diode deteriorated enough to remove and measure?
With the advancement of automobile technology, the power consumption of automobiles is increasingly high. Twenty years ago, the power output of mid-level car generators was typically only around 500 watts. Today, the power output of mid-level car generators is typically around 1,000 watts. The increase in generator power increases with the increase in vehicle electrical equipment. These days, car generators are all air-cooled. The fan behind the pulley blows air into the housing for cooling. Considering the limitations of the existing structure of the air-cooled generator, increasing the power will inevitably lead to an increase in the size of the generator. 1. The function ofgenerator The generator is the main power supply of the car and its function is to operate the engine during normal operation. In normal operation (above idle speed), power is supplied to all electrical equipment ( except the starter) and the battery is charged at the same time. 2. Classification of generators Automotive generators can be divided into direct current generators and alternators. Since alternators are superior to DC generators in many ways, DC generators have been eliminated. Currently, all cars use alternators. classification methods: 1. Five categories according to overall structure (1) Ordinary alternators (generators that require a voltage regulator when used) Example JF132 (for EQ140) Illustration (2) Integrated alternator (generator and regulator are transformed into aintegrated generator). For example, Buick car engine is equipped with CS type alternator (including CS-121, CS-130 and CS-144 different models) (3) Alternator with pump (alternator installed with booster pump) . for the automobile braking system) Example: JFZB292 alternator. (4) Brushless alternator (generator that does not require brushes) Example JFW1913 (5) Permanent magnet alternator (generator with magnetic poles made of permanent magnets) 2. Divided into four categories according to the structure of the rectifier (1) Six Example of JF1522 tube alternator (for Dongfeng Automobile); (2) Example of eight-tube alternator JFZ1542 (for Tianjin Xiali Automobile); (3) Example of nine-tube alternator (for Japanese Hitachi, Sanling and Mazda automobiles) (4) Example of eleven-tube alternator JFZ1913Z (for Audi and Santana cars) 3. Two classifications according to the update form the ground of the field winding (1) One endtee (negative pole) of the field winding of an internally grounded alternator is directly grounded (in contact with the housing) (2) One end (negative pole) of the magnetic field winding of an externally grounded alternator is connected to the regulator and then grounded after passing through the regulator. 3. The alternator model. According to the automobile industry standard QC/T73-93 of the People's Republic of China "Preparation method of automobile electrical equipment product model", the automobile alternator model is composed as follows: 1. Product code Product code. is represented by Chinese letters, Example: JF - Ordinary alternator JFZ - Integrated alternator (integrated regulator) JFB - Alternator with pump JFW - Brushless alternator 2. Voltage level code The voltage level code uses a Expressed by a number Arabic, for example: 1 represents the 12 V system, 2 represents the system24V, 6 represents 6V system 3. Current level code Current level code is also represented by Arabic numeral 4. Design serial number Design serial number is represented by 1 to 2 Arabic numerals. indicating the product design sequence. 5. Warp code: The alternator uses the position of the adjustment arm as the warp code. Viewed from the drive end, the adjustment arm is represented by Z on the left and Y is represented by the adjustment arm on the right end. the adjustment arm is not marked in the middle.