One end of the single-phase generator can be grounded as a neutral line.
Single-phase motors generally refer to small-power single-phase asynchronous motors powered by single-phase AC power (AC220V). This type of motor usually has two-phase windings on the stator and a common squirrel cage rotor. The distribution of the two-phase windings on the stator and the difference in power supply can produce different starting characteristics and operating characteristics.
When a single-phase sinusoidal current passes through the stator winding, the motor generates an alternating magnetic field. The strength and direction of this magnetic field change sinusoidally over time, but its spatial orientation is fixed. therefore This magnetic field is also called alternating pulsed magnetic field. This alternating pulsed magnetic field can be decomposed into two magnetic fieldsrotating labels of the same speed and opposite directions. When the rotor is stationary, these two rotating magnetic fields produce two torques of equal amplitude and opposite directions in the rotor, so that the combined. the torque is zero, so the motor cannot turn. When we use an external force to rotate the motor in a certain direction (such as clockwise rotation), the movement of the magnetic field lines cuts between the rotor and the magnetic field rotating in the clockwise direction becomes smaller than the movement between the rotor and the rotating magnetic field; the counterclockwise rotating magnetic field becomes smaller. The movement of the cutting magnetic field line becomes larger. 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.
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 will generate an alternating magnetic field. The strength and direction of this magnetic field changes sinusoidally with time, but its spatial orientation is fixed, which is why it 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 rotation), the motion ofThe cutting magnetic field lines between the rotor and the clockwise rotating magnetic field become 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 annular armature generator. This type of generatoruses hydraulic power to turn the generator rotor. After repeated improvements, it achieved an output power of 3.2 kW in 1875. In 1882, Gordon of the United States produced a generator with an output power of 44 kW.7 kW two-phase giant generator, 3 meters high, 22 tons.
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.
Baidu Encyclopedia-Generator
Baidu Encyclopedia-Single Phase Motor