The difference between asynchronous and synchronous
Non synchronous motor:
The speed of its electric motor cannot be synchronized with the magnetic field of the stator. Due to the difference in its internal structure, if it is in a synchronized magnetic field, there is no driving power!
Synchronous motor: The magnetic field velocity of its motor and its stator are synchronized
The difference between asynchronous motor and AC motor
Asynchronous motor: When three-phase AC power is passed through the stator circuit, the three-phase voltage constantly changes, and the direction of the magnetic field also changes. Therefore, the rotor will generate a current and power to drive the motor to rotate.
AC commutator motor: The motor is connected to the AC current, and through the commutator, it converts its original waveform into half, that is, half of the sine wave.
Differences in motor type test benches for permanent magnet synchronous, reluctance synchronous, and hysteresis synchronous motors
Permanent magnet: A magnet generates a magnetic field (excitation: supplying a working magnetic field to a synchronous motor or generator).
Reluctance synchronization: a type of synchronous motor that achieves magnetic resistance on different rotor axes and straight axes.
Lag synchronization: using lagging materials to achieve lagging torque
Conclusion: Ultimately, it is the different methods by which power is generated
Asynchronous three-phase, single-phase, shield pole asynchronous
Three phase asynchronous: Three phase currents are continuously converted through three-phase AC to form a magnetic field.
Single phase asynchronous: using 220V power supply, single-phase power supply; There are two coils on the stator, with an electrical angle of 90 °, and one phase dominates, also known as the operating coil; The other one is the secondary coil, which is the starting coil.
The rotor adopts a common squirrel cage rotor structure
The magnetic force formed when there is only one alternating current in a phase winding. When two phase coils pass through alternating current with different phases at the same time, the magnetic force of the motor is usually an elliptical rotating magnetic force, especially under specific conditions, it can be a circular rotating magnetic field.
Shield pole asynchronous: It is also a single-phase motor composed of 220 V single-phase current.
It consists of two coils, a main winding and a secondary winding. Its secondary coil is a covered pole ring, which generates a covered pole field that is significantly different from the main magnetic field.
Summary: The difference between input voltage and secondary winding
Motor type test bench for single-phase series excited motors, AC and DC motors, and the difference between motors:
Single phase series excited motor: Single phase: Single phase: Primary single-phase current
Series excitation: The armature and excitation coil operate in series
Some of them are also AC and DC motors
AC and DC motors
As its name suggests, it can be used for both AC and DC.
Pushing motor
Belonging to single-phase AC speed regulating motor
The stator winding adopts single-phase power supply, and the rotor is an armature winding, which is short circuited with electric brushes.
When the electric brush is offset counterclockwise along the geometric centerline, the rotor will rotate clockwise; When the rotor is offset clockwise along the geometric center direction, it will rotate counterclockwise.