CN2398770Y

CN2398770Y - High moment speed-regulating three-phase asynchronous motor

Info

Publication number: CN2398770Y
Application number: CN 99249633
Authority: CN
Inventors: 袁尊南; 陈春明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-01
Filing date: 1999-11-01
Publication date: 2000-09-27
Anticipated expiration: 2009-11-01

Abstract

The utility model relates to a high moment speed-regulating three-phase asynchronous motor, which is composed of a three-phase four-wire motor, an electronic regulating meter and an electrical power controller, wherein, the motor is composed of a double squirrel cage type rotor, a three-phase four-wire rotor winding, a cooling axial flow fan and a parameter sensor, and the electronic control meter uses the depth of a controlled parameter to regulate the controlled silicon output voltage of the electrical power controller in a negative feedback method in order to keep the constant characteristic of the parameter. The utility model having the advantages of wide speed-regulating ranges from zero to synchronous rotary speed, high output mechanical characteristic and smooth regulation is a high-efficiency and high moment speed-regulating asynchronous motor.

Description

High torque speed governing threephase asynchronous

The utility model relates to a kind of AC asynchronous motor, particularly the AC asynchronous motor of a kind of pair of mouse cage three-phase stepless speed regulation.

Existing alternating current motor, especially mouse cage three-phase AC asynchronous motor, though have simple in structure firm, mechanical property is hard, cost is low, for ease of maintenaince wait advantage, it never obtains desirable solution on speed change or permanent torque operation problem.Though this type of motor is very extensive on using, but can only use feature motor such as structure is numerous and diverse, cost is expensive direct current machine, electromagnetic coupling asynchronous motor, adjustable frequency motor, moment asynchronous motor.

The purpose of this utility model provides a kind of high torque speed-regulating asynchronous motor with automatic regulatory function, still has high torque output during wide, the low cruise of adjustable range during use, and good stability, manufacturing process is simple, cost is low.

For achieving the above object, the utility model is made of high torque three-phase and four-line asynchronous motor, is aided with electronic regulating unit and power control unit is regulated control.Motor is made up of double-cage rotor, three-phase four-wire system stator winding, cooling axial flow blower and torque sensor.Electronic regulating unit is made of three-phase synchronizer trigger, speed parameter transmitter, degree of depth negative feedback closed loop adjuster, limiter of speed and protector.Power control unit is three same phase SCR control circuit.

During the motor operation, the departure between motor speed and the setting rotating speed makes the electrical adjustment instrument adjust silicon controlled output voltage amount in the main circuit automatically, thereby keeps the permanent character of speed parameter.Speed adjustable range can be from zero to approaching specified synchronous speed, and adjusting is level and smooth during speed governing, mechanical property is hard, torque is also big.High torque speed governing threephase asynchronous of the present utility model is in trial-production and actual the use, show many good features, wide as speed adjustable range, can be from zero near specified synchronous speed, when the low speed, still have and high hard, the permanent rotating speed better function of torque output, mechanical property, governing speed is fast, good stability, on governor control characteristics near DC motor etc.

Fig. 1 is the cutaway view of high torque speed governing threephase asynchronous of the present utility model.

Fig. 2 is adjusting, the control principle block diagram of high torque speed governing threephase asynchronous of the present utility model.

Fig. 3 is mechanical property figure of the present utility model.

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

High torque speed governing threephase asynchronous shown in Figure 1, the stator winding (2) of stator core (3) and three-phase four-wire system is housed on support (1), be embedded with the upper cage (5) that brass rod constitutes on the rotor core (4), the main startup function of doing, the lower cage (6) that also has the red copper bar to constitute is mainly made operation function.The oblique tooth pitch of the flute profile of rotor core (4) is used to weaken high order harmonic component.Phenomenon that the motor feels hot when solving low speed is equipped with cooling axial flow blower (7) at the motor non-shaft stretching end, and motor is in operation like this, just can obtain the effect of high efficiency, high torque (HT).For controlled quentity controlled variable is provided, velocity transducer (8) also is equipped with in the motor end.

The adjusting control principle block diagram of whole motor shown in Figure 2.Controllable silicon changes with the three same phase angles of flow in the power control unit (1), export different phase voltages in speed-regulating asynchronous motor (2), form different rotating speeds, deliver to transmitter (V) in the electrical adjustment instrument (3) by transducer, show that in speed (X) compares with manual setting device (H) simultaneously, by certain functional transformation, the triggering initial angle that output was regulated forms the control of speed degree of depth negative feedback closed loop in adjuster (D).Limiter of speed (T) prevents to regulate improper and vibration that produce, and feedback quantity control point adjustment (F) produces the strong attitude of best work.Synchronizer trigger (E) guarantees to stablize out-put supply.

The utility model actual motion mechanical property shown in Figure 3, with speed-regulating asynchronous motor terminal voltage difference, form different rotary speed-torque characteristic curves, different loads changes rotating speed again, and is constant for guaranteeing rotating speed, must readjust voltage swing, different negative velocity feedback intensity form different among a small circle the machine operation line PQ of velocity variations, thereby speed is able near constant, and double-cage rotor improves detent torque MQ, thus high torque output when low speed has been arranged.

Claims

1, high torque speed governing threephase asynchronous is united by double-cage rotor, threephase stator winding, aerofoil fan and velocity pick-up and is constituted, it is characterized in that on electric machine stand (1), being equipped with stator core (3) and three-phase four-wire system winding (2), be embedded with the upper cage (5) that brass constitutes on the rotor core (4), the lower cage (6) that red copper constitutes, the oblique tooth square of the flute profile of rotor core (4), the motor non-shaft stretching end changes the cooling aerofoil fan, on support (1) velocity transducer is housed.

2, high torque speed governing threephase asynchronous according to claim 1, it is characterized in that supplying with motor power by three-phase four-wire system, regulate the motor three-phase phase voltage by transducer, instrument, controllable silicon degree of depth negative feedback closed loop and change, reach the purpose of speed governing, constant speed.