A generator converts kinetic energy into electrical energy; an electric motor converts electrical energy into kinetic energy.
Generators are mechanical devices that convert other forms of energy into electrical energy. They are driven by water turbines, steam turbines, diesel engines or other electrical machines to convert water flow, air flow. , fuel combustion or atomic nuclei The energy produced by fission is converted into mechanical energy and transmitted to the generator, which is then converted into electrical energy.
Motors are a device that converts electrical energy into mechanical energy. It uses a live coil (i.e. the stator winding) to generate a rotating magnetic field and acts on the closed squirrel cage aluminum frame of the rotor to form a magneto-electric rotating torque . The engines are divized into DC motors and AC motors according to different power sources. Most motors in the electrical system are AC motors, which can be synchronous motors or asynchronous motors (the speed of the motor stator's magnetic field does not maintain the same speed). such as the rotation speed of the rotor). The motor is mainly composed of a stator and a rotor. The direction of forced movement of the live wire in the magnetic field is related to the direction of current and the direction of the magnetic field lines (magnetic field direction). The working principle of the motor is the force exerted by the magnetic field on the current, causing the motor to rotate.
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What is the operating principle of a car generator?
An electric motor (Motor) is a device that converts electrical energy into mechanical energy. It uses a live coil (i.e. the stator winding) to generate a rotating magnetic field and acts on the rotor (like a closed squirrel cage aluminum frame) to form a rotating torque magneto-electric. Motors are divided into DC motors and AC motors according to different power sources. Most motors in the electrical system are AC motors, which can be synchronous motors or asynchronous motors (the speed of the motor stator's magnetic field does not maintain the same speed). such as the rotation speed of the rotor). The motor is mainly composed of a stator and a rotor. The direction of forced movement of the live wire in the magnetic field is related to the direction of current and the direction of the magnetic field lines (magnetic field direction). The principle ofhe motor operation is the force exerted by the magnetic field on the current, causing the motor to rotate.
Generators are divided into diesel generators and gasoline generators, but whether it is a diesel generator or a gasoline generator, each cylinder performs work in a certain order and the thrust acting on the piston passes through the connecting rod. This becomes the force that turns the crankshaft, thus causing the crankshaft to rotate. By installing the brushless synchronous alternator coaxially to the crankshaft of the electric machine, the rotation of the electric machine can be used to drive the generator rotor. Using the principle of "electromagnetic induction", the generator will produce induced electromotive force. and a current can be generated through the closed charging loop.
1. When the external circuit feeds the excitation winding through the brush, a magneti fieldque is generated, causing the claw pole to be magnetized into N pole and S pole. As the rotor rotates, the magnetic flux changes alternately in the stator winding. According to the principle of electromagnetic induction, it can be seen that an alternating induced electromotive force is generated in the three-phase winding of the stator. The motor drives the rotor of the synchronous generator excited by the direct current to rotate at a speed n, and the winding of the three-phase stator induces an alternating potential.
If the stator winding is connected to an electrical load, the motor has an AC output and the rectifier bridge inside the generator converts the AC to DC and outputs it from the output terminal.
2. After starting the engine, as the speed of the generator increases, the voltage across the generator also continues to increase. When the generator output voltage is equal to the voltage ofthe battery, the potentials of the generator terminals “B” and “D” are equal. At this time, the charging indicator light turns off due to the potential difference between the two ends. is zero. Indicates that the generator is operating normally and the excitation current is supplied by the generator itself.
The three-phase AC electromotive force generated by the three-phase winding of the generator is rectified by the diode, and then produces DC power to power the load and charge the battery.
Detailed information:
Car engine precautions:
① Frequently clean the scale and dust outside the generator and keep it clean and well ventilated.
② Frequently check the tightening conditions of the generator-related fasteners and tighten the screws in time.
③The tension of the transmission belt must be appropriate. If it is too loose, it will slip easilyand will result in insufficient energy production; if it is too tight, it will easily damage the belt and generator bearings.
④When installing the battery, be careful not to install it incorrectly. Usually, install the positive wire first and not the ground wire, otherwise the diode will burn out easily.
Baidu Encyclopedia-Car Generator