Three-phase variable-speed (multi-speed) motor wiring diagram:
YD series double-speed, three-speed and four-speed motor winding lead wires were 6, 9 and 12. Against the motor terminal board wiring symbols access to the corresponding phase sequence of the three-phase power supply, the direction of rotation of the motor from the end of the shaft extension section as clockwise direction, any two of the three-phase power line adjustment, the motor can change the direction of rotation.
In order to ensure the reliability of multi-speed motor operation, the design and operation of the control device, should pay attention to the following three points:
1, in the high-speed switching to low-speed, must be in the switching power supply at the same time, disconnect the neutral point of the 2Y wiring, so as not to cause a short-circuit of the power supply in the low-speed windings are connected.
2, in the process of high speed switching to low speed, must wait until the motor stops before turning on the low-speed winding power supply, in order to reduce the impact on the motor and load.
3, speed switching, pay attention to the motor steering.
Expanded:
Types of electric motors
1, according to the working power source classification according to the different working power source of the motor, can be divided into DC motor and AC motor. Among them, AC motors are also divided into single-phase motors and three-phase motors.
2, according to the structure and working principle of classification of electric motors according to the structure and working principle can be divided into direct current motors, asynchronous motors and synchronous motors.
3, according to the starting and operation mode classification motor according to the starting and operation mode can be divided into capacitor start single-phase asynchronous motor, capacitor run single-phase asynchronous motor, capacitor start run single-phase asynchronous motor and split-phase single-phase asynchronous motor.
4, according to the use of electric motors can be divided into drive motors and control motors.
Driving motor is divided into electric tools (including drilling, polishing, grinding, grooving, cutting, reaming and other tools) with electric motors, home appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, VCRs, video recorders, video disk players, vacuum cleaners, cameras, hairdryers, electric shavers, etc.) with electric motors and other general-purpose small machinery and equipment (including a variety of small machine tools, small machines, medical equipment, electronic instruments, etc.) with motors, and other general-purpose small mechanical equipment (including a variety of small machine tools, small machines, medical equipment, electronic instruments, etc.) with motors. medical equipment, electronic instruments, etc.) with electric motors.
Baidu Encyclopedia - Multi-Speed Motor
Baidu Encyclopedia - Multi-Speed Asynchronous Motor