Method and device for inhibiting eddy current of shield housings of shielded motor

Abstract

The invention discloses a method and a device for inhibiting eddy current of shield housings of a shielded motor. The method is characterized in that eddy current of the shield housings and eddy current loss are inhibited by mutually offsetting eddy current induced potentials which are formed in the shield housings of the shielded motor and have same size and opposite directions. The device is characterized in that the whole shielded motor comprises two axially-arrayed stators and two coaxially-assembled rotors, wherein the two stators and the two rotors are identical in a structural form and dimension parameters; a polar distance is formed between two stator windings in circumferential space; the two stators share one stator shield housing; and the two rotors share one rotor shield housing. According to the method and the device disclosed by the invention, the eddy current induced potentials can be offset to the maximum extent, so that eddy current and eddy current loss are fundamentally inhibited, the efficiency of the shielded motor can be improved and the aims of reducing consumption and saving energy are achieved. In addition, due to the reduction of the eddy current loss, the reduction of temperature rise is facilitated, the temperature deformation of the shield housings can be reduced and the reliability, the stability and the safety of operation of a shield pump are improved.

Description

technical field [0001] The invention relates to a design technology of a special motor, in particular to a method and a device for suppressing the eddy current of a shielded motor in a shielded motor, and belongs to the technical fields of sealed transmission technology and special motors in power engineering. It is mainly used in the electrical drive of fully sealed devices that require no dynamic seal and no leakage, and can be widely used in shielded electric pumps, magnetic pumps, magnetic stirring reactors, magnetic valves, vacuum magnetic drive equipment, magnetic drive detection instruments and other magnetic forces. transmission system. Background technique [0002] At present, shielded electric pumps and magnetic seal valves, which are mainly used in the fields of nuclear power, military industry, petroleum, chemical industry, refrigeration, medicine, food industry and bioengineering, etc., all need to adopt full-tight measures to protect against corrosive, highly t...

AI Technical Summary

Problems solved by technology

The stator and rotor shielding sleeves of shielded motors are mostly made of metal materials with high pressure resistance, corrosion resistance, high strength, and good thermal conductivity; the rotating magnetic field of the shielded motor will generate eddy current induction potential in the stator and rotor shielding sleeves, forming eddy currents. The eddy current power consumption of the shielding sleeve, so the efficiency of the shielded motor is much lower than that of the ordinary motor with the same power and the same number of poles

At the same time, the eddy current loss of the shielding sleeve will convert electric energy into heat, which will affect the temperature rise of the shielded motor. In particular, the heating of the shielding sleeve will cause the deformation of the shielding sleeve. In severe cases, the shielding sleeve will rupture, resulting in leakage, injury, explosion and other safety accidents.

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