Disc type permanent magnet motor with multiple power units

Abstract

The invention discloses a disc type permanent magnet motor with multiple power units. The disc type permanent magnet motor comprises a plurality of motor power units, wherein each motor power unit is an independent disc type permanent magnet motor, each disc type permanent magnet motor comprises double stators and double permanent magnet rotors, and each motor power unit is independently connected with an external controller, so that independent control or centralized control of the motor power units is realized. According to the invention, a high-power motor is divided into a plurality of low-power motors, so that the motor power unit does not need to adopt a high-voltage class design, and the motor is simple to produce and manufacture, compact in structure and free to control, a low-voltage frequency converter with better performance and reliability can be used for control, the cost is low, the safety is high, the functions of overload protection, soft start, speed regulation and the like are added, the practicability is high, and the flexibility is high.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a disc permanent magnet motor with multiple power units. Background technique [0002] Due to its high power density and high efficiency, permanent magnet motors have been widely used in recent years. The output power and output torque of the motor are also increasing, and its volume and weight are also increasing. This brings great difficulties to the production and manufacture of motors, and at the same time, it also brings great difficulties to the design and production of high-voltage controllers, such as: currently used in mining, electric power, metallurgy, cement and other industries The motor is basically above 300kW, and the voltage of this type of motor is basically 6kV and 10kV. For the design and production of the motor stator, a high-voltage insulation structure must be used; for the motor controller, a high-voltage frequency conversion must be config...

AI Technical Summary

Problems solved by technology

[0002] Due to its high power density and high efficiency, permanent magnet motors have been widely used in recent years. The output power and output torque of the motor are also increasing, and its volume and weight are also increasing. This brings great difficulties to the production and manufacture of motors, and at the same time, it also brings great difficulties to the design and production of high-voltage controllers, such as: currently used in mining, electric power, metallurgy, cement and other industries The motor is basically above 300kW, and the voltage of this type of motor is basically 6kV and 10kV. For the design and production of the motor stator, a high-voltage insulation structure must be used; for the motor controller, a high-voltage frequency conversion must be configured. device

The cost of the insulation structure of high-voltage motors is obviously higher than that of low-voltage motors, and high-voltage electronic components and power supplies are also very expensive, and their performance and reliability are far inferior to low-voltage inverters.

[0003] There are many researches in the field of multi-disk combination of disc motors, for example: Patent No. CN107370317A "Multilayer Disc Motor and Automobile with the Motor", which focuses on making multi-disk windings into star connection and delta The conversion of the connection method is to obtain better motor performance and generator performance. That is to say, the purpose of adopting the multi-disc structure is not to solve the problem of high voltage and high power of the motor and controller. The patent number is CN108964389B "a kind of "Low-voltage high-power axial combined disc permanent magnet motor" patent introduces a high-power motor that adopts a multi-motor unit combination design, but its motor stator disc is composed of a stator yoke disc and a stator tooth block, which is not conducive to manufacturing

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