Wiring mechanism, permanent-magnetic adjustable-speed motor, and centrifugal refrigeration compressor

Abstract

A wiring mechanism, a permanent magnet speed regulation motor and a centrifugal type refrigeration compressor. The wiring mechanism comprises a wiring board, power supply wiring posts and sealing rings; the wiring board is made of steel, and the magnetic permeability μ of the steel is less than or equal to 1.31×10-6H / m. The wiring board is a flat board provided with an upper surface and a lower surface, and is provided with wiring holes thereon. The sealing rings are sleeved on the power supply wiring posts. The power supply wiring posts are fixed with the wiring board via the wiring holes. The sealing rings are clung to the wiring board, so that an objective of reducing heating of electrical eddy current is achieved.

Description

technical field [0001] The invention relates to a motor, in particular to a wiring mechanism with good heat dissipation and sealability for the motor, a permanent magnet speed-regulating motor and a centrifugal refrigeration compressor using the wiring mechanism. Background technique [0002] In the prior art, for the permanent magnet variable speed motor, due to the influence of the eddy current, the motor wiring parts made of ordinary steel are prone to heat. According to the law of electromagnetic induction, the induced electromotive force E=dψ / dt, so the greater the frequency, the dt The smaller it is, the greater the induced electromotive force E is, the induced current increases, the heat generation increases, and the temperature is high, resulting in poor reliability and even potential safety hazards. Especially in the centrifugal refrigerating compressor using the permanent magnet speed regulating motor, if the terminal board heats up seriously, it will also cause se...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, for the permanent magnet variable speed motor, due to the influence of the eddy current, the motor wiring parts made of ordinary steel are prone to heat. According to the law of electromagnetic induction, the induced electromotive force E=dψ / dt, so the greater the frequency, the dt The smaller it is, the greater the induced electromotive force E is, the induced current increases, the heat generation increases, and the temperature is high, resulting in poor reliability and even potential safety hazards

Especially in centrifugal refrigeration compressors that use permanent magnet speed regulating motors, if the terminal board heats up severely, it will also cause seal failure, causing the refrigerant used for motor cooling to leak

[0003] However, the motor wiring components made of electrical insulating materials are not only bulky, difficult to produce, but also low in reliability.

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