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| The working principle of integral alternator |
| When the external circuit through the brush to energize the field winding, it generates a magnetic field, so that claw poles are N and S poles. When the rotor rotates, the magnetic flux alternates in the stator winding, according to the electromagnetic induction principle, the stator three-phase winding will produce the alternating induced electromotive force. This is the alternator power generation principle. By the original motivation (that is, the engine) to drag the DC excitation of the synchronous generator rotor to speed n (rpm) rotation, three-phase stator winding will sense the AC potential. Stator winding If access to electricity load, the motor has AC power output, after the generator internal rectifier bridge will convert AC into DC output from the output terminal. The alternator is divided into two parts, the stator windings and the rotor windings. The three-phase stator windings are distributed on the case at an angle of 120 degrees from each other. The rotor windings are composed of two claws. When the rotor winding DC is excited when the excitation, two pole claw to form N pole and S pole. Magnetic lines of force starting from the N-pole, through the air gap into the stator core and then return to the adjacent S-pole. Once the rotor rotates, the rotor winding will cut the magnetic field lines in the stator windings produce 120 degrees of mutual difference between the sine electromotive force, that is, three-phase alternating current, and then through the rectifier diode components into DC output. When the switch is closed, the battery is supplied with current. The circuit is: Battery positive --charge indicator -- regulator contact --excitation winding --ground -- battery negative. At this time, because the charge indicator light through the current, so the light will be on. However, after the engine starts, as the generator speed increases, the generator terminal voltage is also rising. When the generator output voltage and the battery voltage is equal, the generator "B" and "D" side of the same potential, at this time, the charge indicator light because the difference between the two ends of the zero off. Indicating that the generator has been working properly, the excitation current supplied by the generator itself. Three-phase winding in the generator generated by the three-phase AC EMF rectified by the diode, the output DC, to the load power supply, and to the battery charge. [ Previous] [Next] [Return] |