CN205248932U - Transform end links thickness reduces high -efficient asynchronous motor of pick -up current - Google Patents

Abstract

The utility model relates to a transform end links thickness reduces high -efficient asynchronous motor of pick -up current. The cage ring of cage rotor one end along radially being decomposed into two parts: some still keeps unchangeable with the binding of squirrel -cage bar, and on the centrifuge among the centrifugal switch was fixed to another part " additional end links ", when the motor started, the cage ring that cage rotor only reduces behind the thickness reacted, after the motor reached predetermined rotational speed, the centrifuge among the centrifugal switch drove " additional end links " subsides deflation and subtracts the cage ring behind the thickness, resumes complete end links thickness.

Description

The high-efficiency asynchronous electric motor of conversion end ring thickness reduction starting current

Technical field

The utility model relates to a kind of high-efficiency asynchronous electric motor that converts end ring thickness reduction starting current.

Background technology

General Cage Rotor Asynchronous Motor, is all according to the mouse cage of design standard design rotor, owing to will take into account motor torque capacity and detent torque simultaneously, and has to sacrifice some necessary electromagnetic parameters, occurs the contradiction of attending to one thing and lose sight of another.

Summary of the invention

The purpose of this utility model, being to provide one can be in motor start-up and normal operation process, utilizes the effect of sedimentator in centrifugal switch automatically to adjust the energy-efficient asynchronous motor of rotor cage ring thickness.

Realizing the technical solution of the utility model is: the cage ring of cage rotor one end is radially decomposed into two parts: a part still keeps constant with the link of squirrel-cage bar, another part " additional end ring " is fixed on the sedimentator in centrifugal switch, when motor start-up, cage rotor only has the cage ring after reduction thickness to work; Electrical motors is after desired speed, and the sedimentator in centrifugal switch drives " additional end ring " to be adjacent to the cage ring after reduction thickness, the end ring thickness regaining one's integrity.

After such change, because starting process of motor has reduced the end ring thickness of mouse cage one end, the internal resistance of mouse cage entirety strengthens, reduce the induced-current of rotor, also just reduced the starting current of motor, thereby indirectly increase the local voltage of start-up course, ensured enough detent torques.

Brief description of the drawings

Fig. 1 is the schematic diagram of efficiently asynchronous (single-phase) motor of conversion end ring thickness reduction starting current.

In figure: 1 is the sedimentator support in centrifugal switch; 2 cage rings for reduction thickness; 3 for being fixed to the additional end ring on the sedimentator in centrifugal switch; 4 is centrifugal-block fixed mount; 5 is the centrifugal-block of sedimentator; 6 is stage clip; 7 is movable contact reed; 8 is movable contact; 9 is stationary contact; 10 is machine shaft; 11 is the rotor of built-in squirrel-cage bar.

Detailed description of the invention

Further introduce detailed description of the invention of the present utility model below in conjunction with accompanying drawing:

Please refer to Fig. 1: motor is in static or start-up course, because the effect of stage clip [6], sedimentator support [1] presses to the movable contact reed [7] of centrifugal switch, and movable contact [8] is with stationary contact [9] in conjunction with connecting start-up capacitance, and motor enters starting state; The 75%(that brings up to rated rotational frequency along with rotating speed is different according to this ratio of designing requirement) time, under the effect of the centrifugal force producing at centrifugal-block [5], movable contact reed [7] is broken away from the compacting of sedimentator support [1] to it, movable contact [8] separates with stationary contact [9] and finishes start-up course, be fixed on additional end ring [3] on sedimentator support [1] simultaneously and be driven with cage ring [2] and be closely as one, motor enters normal operating condition.

Because the mechanism of action is not quite similar, though structural principle is constant, can obviously find out that by Fig. 1 the sedimentator support [1] in this technology has obvious difference with the sedimentator support shape in common centrifugal switch of single-phase motor: the former increases a cup dolly in order to fixing additional end ring on the basis of the latter's sedimentator support. So simple alteration of form need not any performing creative labour, can understand easily according to the signal of Fig. 1, so no longer it is carried out to text description more specifically.

Claims (1)

1. one kind converts the high-efficiency asynchronous electric motor of end ring thickness reduction starting current, it is characterized in that: the cage ring of cage rotor one end is radially decomposed into two parts: a part still keeps constant with the link of squirrel-cage bar, another part " additional end ring " is fixed on the sedimentator in centrifugal switch, when motor start-up, cage rotor only has the cage ring after reduction thickness to work; Electrical motors is after desired speed, and the sedimentator in centrifugal switch drives " additional end ring " to be adjacent to the cage ring after reduction thickness, the end ring thickness regaining one's integrity.