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Cummins diesel engine charger generator physical map and parameter models are for reference only: please contact our sales online customer service for specific price models,
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Cummins diesel generator charger working principle and maintenance introduction
I. Overview of Cummins Charger Generator
▶ The power supply to the Cummins diesel engine electrical control system load is called the charger generator.
1). The main functional components of the generator
① Stator: current generation function
② Rotor: Induced power generation function; (Electromagnet)
③ Rectifier bridge (rectifier diode): AC current → convert to DC current.
④ Automatic voltage regulator: Adjust output stable voltage function.
2). Stator: The stator magnetizes the rotor (N, S poles) to generate AC current, which acts as a rectifier bridge that is rectified to DC.
Stator structure: CORE internal slot laminated with thin iron plate has 3-phase COIL.
Three-phase connection method: There is a △ connection method, a Y connection method, and it is properly used according to the application. (In the Y connection, a neutral point is sometimes used to improve power.)
3). Rotor: The two ends of the excitation coil are connected to SLIP RING respectively, and the claw poles are magnetized (N, S pole) to generate AC current in the stator according to the rotation of the engine and receiving the exciting current through the brush.
-There is SHFT in the middle of the rotor, and the exciting coil is held in the center by claw poles.
-The rotor rotates at a high speed of 2 to 3 times the RPM of the engine pulley.
4). Rectifier bridge: A device that rectifies the AC current generated in the stator of the generator into DC.
-Components: Main DIODE (composed of + 3 and-3, AC to DC)
Auxiliary DIODE (by 3 field current), there are also TYPE.
HEAT SINK (heat sink) (main DIODE and auxiliary DIODE are formed to cool the heat)
5). Regulator: The voltage generated by the generator varies according to the speed. The reason why the regulator has nothing to do with the speed to maintain the generated voltage to a certain degree.
When the detected voltage is exceeded, the exciting current is reduced or becomes "0" to reduce the voltage. When the voltage is decreased, the exciting current is increased to maintain the terminal voltage to a certain level.
The function of the regulator is to adjust the voltage according to the ambient temperature. This function is called the temperature characteristic. Recently, a regulator that can check the failure of the charging system by itself is often used.
5) -1. "L, S (R)" TYPE circuit diagram of generator
★ Voltage adjustment function: Cold no-load ENG. Under 2500 RPM (LS TYPE: 14.4 ± 0.3 V) / (LR TYPE: 14.7 ± 0.3V)
★ Temperature characteristics: When the product temperature rises by 10 ℃, the voltage decreases by 0.1 V
5) -2. "Fr, L, S, G" TYPE circuit diagram of generator
5) -3 generator "LRC" function (Load Response Control)
When the engine introduces a sharp current during IDLE, the regulator prevents the IDLE speed of the engine, and in order to avoid a sudden increase in the engine load, the rotor excitation current is cut off and the current is gradually increased to reduce the change in engine speed. Based on this action, the regulator is increasing the fuel ratio. It also contributes to reducing exhaust emissions and improving ride comfort.
LRC start time SPEC: 5 ± 3 seconds (start time depends on battery status and load usage),
2.Exploded view of generator and components
1. Nut 2. Spring washer 3. Pulley 4. Through bolt 5. Limit ring 6. Drive end cover 7. Bearing 8. Bearing cover 9. Limit ring 10. Rotor 11. Stator 12. Regulator 13. Insulation sleeve 14. Nut 15. Compensation sleeve 16. Brush end cover 17. Rectifier bridge 18. Screw 19. Screw