CN2351905Y

CN2351905Y - Low-noise micro-size single three-phase asynchronous motor

Info

Publication number: CN2351905Y
Application number: CN98222803U
Authority: CN
Inventors: 李洪宇
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-02
Filing date: 1998-11-02
Publication date: 1999-12-01
Anticipated expiration: 2008-11-02

Abstract

The utility model provides a low-noise micro-size single three-phase asynchronous motor, which is composed of a three-phase asynchronous motor M, capacitors C1 and C2 and resistors R1, R2 and R3, three phase lines A, B and C of the three-phase asynchronous motor M are respectively connected in series with the capacitor C1 and the resistors R2 and R3 and is connected in parallel with a line of alternating-current; the capacitor C1 and the R2 are connected in series between the A and B lines of the three-phase asynchronous motor M; a b line of alternating-current is connected with a middle connection point of the capacitor C1 and the R2. The utility model has the advantages of reasonable design, simple structure, easy manufacturing, convenient operation, etc.

Description

The miniature single threephase asynchronous of low noise

The utility model relates to a kind of micromotor, the miniature single threephase asynchronous of specifically a kind of low noise.

Micromotor is controlled in industrial automation, use very general in the fields such as the various cooling fans in the microcomputer and other business automation equipments, use common civil power workmanship to make power supply because the said equipment, so also single-phase miniature electric machines that use of the micromotor in the equipment more, as everyone knows, single-phase motor deficiency in use is that noise is big, vibrations are big, noise and vibrations influence concerning computer and precision instrument and equipment is very big, thereby the single-phase miniature electric machine of prior art can not adapt to modern office equipment and scientific instrument need of work.And threephase motor is with respect to single-phase motor, noise and vibrations are much smaller, but, the three-phase miniature motor of prior art adopts the mode that increases motor windings tap or the coiling of change motor to adapt to the requirement of single phase poaer supply more, because criteria of right and wrong motor, thereby be not easy to promote the use of very much.

The purpose of this utility model provides a kind of energy and uses the adaptation modern office equipment of single-phase civil power and the miniature single threephase asynchronous of low noise of appliance requires.

The purpose of this utility model realizes in the following manner, installs the resistance-capacitance type phase-shift circuit additional on three phase connections of existing three-phase miniature motor, converts common single-phase civil power to three-phase electricity and uses for the three-phase miniature motor.

Accompanying drawing is the electrical block diagram of the miniature single threephase asynchronous of low noise.

With reference to Figure of description to low-noise micro-size single three-phase asynchronous motor of the present utility model do with Under explain.

Low-noise micro-size single three-phase asynchronous motor of the present utility model, its structure are by threephase asynchronous M, capacitor C₁、C ₂, resistance R₁、R ₂、R ₃Consist of, three phase line ABC of threephase asynchronous M are connected in series respectively capacitor C₁, resistance R₂And R₃Rear and alternating current a line also connects capacitor C₁And R₂Be serially connected between the AB phase line of threephase asynchronous M, alternating current b line is connected on capacitor C₁And R₂Intermediate contact on.

Embodiment:

The miniature single threephase asynchronous of low noise of the present utility model, its processing and fabricating is very simple and convenient, operation shown in the by specification accompanying drawing gets final product, threephase asynchronous is the universal miniature threephase asynchronous, its original wiring is constant, just outer meeting resistance, capacity cell are formed phase-shift circuit on three phase lines, convert common city's power for illumination to three-phase to satisfy the requirement of threephase asynchronous phase angle, make threephase asynchronous use the two-phase electricity to obtain the stabilized (steady-state) speed that uses three-phase electricity the same equally, reduce the influence of vibrations and noise instrument and equipment.

Low-noise micro-size single three-phase asynchronous motor of the present utility model is compared with existing technology, and has Reasonable in design, simple in structure, be easy to the characteristics such as processing, easy to use, applied range, thereby, Have good value for applications.

Except the described technical characterictic of specification, be the known technology of those skilled in the art.

Claims

1. the miniature single threephase asynchronous of low noise comprises threephase asynchronous M, capacitor C ₁, C ₂, resistance R ₁, R ₂, R ₃, it is characterized in that three phase line ABC of threephase asynchronous M are connected in series capacitor C respectively ₁, resistance R ₂And R ₃The back is with alternating current a line and connect capacitor C ₁And R ₂Be serially connected between the AB phase line of threephase asynchronous M, alternating current b line is connected on capacitor C ₁And R ₂Intermediate contact on.