Compressor system, winding switching device of motor and control method of winding switching device of motor

Abstract

The invention discloses a winding switching device of a motor. The motor comprises a stator and a rotor, and a first winding and a second winding which orthogonal in space are wound on the stator. The winding switching device comprises a first switch, a second switch, a third switch, a protector, a voltage detection module and a control module, wherein the voltage detection module is used for detecting the voltage of a power source, and the control module is used for switching the master and slave relation between the first winding and the second winding according to the voltage of the power source by controlling the first switch, the second switch and the third switch. Through the winding switching device, not only can the motor run in a wide voltage range, but also taps do not need to be arranged on the windings of the motor. The manufacturing technology is general, and production efficiency is improved. The invention further discloses a control method of the winding switching device of the motor and a compressor system with the winding switching device.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a winding switching device for a motor, a control method thereof, and a compressor system provided with the winding switching device for a motor. Background technique [0002] At present, the fluctuation range of the operating voltage of the fixed-speed rotor compressor is generally ±15% of the rated voltage, and the voltage protection range of the protector is: the minimum voltage is -20% or -30% of the rated voltage. However, in some areas with unstable power grids, the voltage is low during the peak power consumption in summer, which will cause the compressor to stall, and then the protector will operate, making the air conditioner unable to cool and affecting the use of users. Even in some areas, the voltage will be too low to exceed the voltage protection range of the protector during the peak power consumption in summer, which will cause the motor to burn out. [0003] In t...

AI Technical Summary

Problems solved by technology

However, in some areas with unstable power grids, the voltage is low during peak power consumption in summer, which will cause the compressor to stall, and then the protector will operate, making the air conditioner unable to cool, affecting the use of users

Even in some areas, the voltage will be too low to exceed the voltage protection range of the protector during the peak power consumption in summer, which will cause the motor to burn out

[0003] In the related art, there is a wide voltage band design, that is, the fluctuation range of the operating voltage of the motor is ±30% of the rated voltage to solve the above problems, but this will lead to a poor energy efficiency ratio of the rated voltage; there is also a method of using a main winding tap To make the fluctuation range of the operating voltage of the motor be ±30% of the rated voltage, but this will increase the difficulty of the winding manufacturing process, the production efficiency is low, and the voltage difference between the coils is large

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