The wiring method of a 5000W single-phase gasoline generator is as shown in the figure:
When the single-phase sinusoidal current passes through the stator winding, the motor generates an alternating current. magnetic field. The strength of this magnetic field The direction of the weak sum changes sinusoidally with time, but its spatial orientation is fixed, therefore this magnetic field is also called an alternating pulsed magnetic field.
This alternating pulsed magnetic field can be decomposed into two rotating magnetic fields of the same speed and opposite directions. When the rotor is stationary, these two rotating magnetic fields produce two equal and opposite directions in the rotor. the opposing torque makes the resulting torque zero, so the motor cannot rotate.
When an external force is used to rotate the motor in a certain direction (such as clockwise rotationclockwise), the movement of the cutting magnetic field lines between the rotor and the clockwise rotating magnetic field becomes smaller. The movement of the magnetic field lines cutting between the rotating magnetic fields becomes greater. In this way, the balance is broken, the total electromagnetic torque generated by the rotor will no longer be zero, and the rotor will rotate in the direction of thrust.
Detailed information
In 1832, the Frenchman Bixy invented the manually operated direct current generator. The principle is to rotate the permanent magnet to produce the magnetic flux. Changes in the coil generate an induced emf, and this emf is output as a direct voltage. In 1866, Siemens in Germany invented the self-excited DC generator.
In 1870, Gram of Belgium manufactured an annular armature and invented the armature generatorannular ure. This type of generator uses hydraulic power to turn the generator rotor. After repeated improvements, it reached an output power of 3.2 kW in 1875. In 1882, Gordon of the United States produced a generator with an output power of 447 kW, or 3 meters. high and weighed 22 tons. Giant two-phase generator.
In 1896, Tesla's two-phase alternator began operating at the Nyala power station, and 3,750 kW, 5,000 V AC, was sent to Buffalo, 40 kilometers away. there.
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