CN2063717U

CN2063717U - Ac stepless voltage and speed regulating asynchronous motor

Info

Publication number: CN2063717U
Application number: CN 90211020
Authority: CN
Inventors: 陈春初; 李满云; 朱仲华; 刘建能
Original assignee: SPECIAL MOTOR INST XIANGTAN CI
Current assignee: SPECIAL MOTOR INST XIANGTAN CI
Priority date: 1990-01-10
Filing date: 1990-01-10
Publication date: 1990-10-10

Abstract

The utility model discloses an AC stepless voltage and speed regulating asynchronous motor belonging to the field of motor manufacturing, which is composed of a box body, a rotary shaft, an external rotor, a stator and a speed testing generator which is arranged outside the box body, and wherein, the rotary shaft, the external rotor and the stator are arranged in the box body. The utility model utilizes the principle of voltage and speed regulating of controlled silicon of a three-phrase asynchronous motor, and has the advantages of simple structure, convenient assembly and disassembly, high efficiency, convenient in frequent starting and normal-reverse pointing inching; besides, the utility model can select reasonably the number of poles number of poles of the stator winding according to the different rotation speeds of long time running, so the utility model is a novel AC stepless voltage and speed regulating asynchronous motor.

Description

AC stepless voltage and speed regulating asynchronous motor

The utility model relates to a kind of asynchronous machine of AC stepless variable voltage control, and it belongs to field of motor manufacturing.

At present, the electromagnetic speed control motor is because its reliable operation, speed-regulating range width and be widely used in industries such as weaving, printing, metallurgy, but this motor remains in some shortcomings: zero load can not speed governing, not steady during starting, slip clutch part manufacture process requirement height, maintenance difficult.

The purpose of this utility model is to provide a kind of asynchronous machine that uses the novel AC stepless variable voltage control of threephase asynchronous machine silicon-controlled voltage regulation speed control principle manufacturing.

Task of the present utility model is finished with following proposal:

It comprises casing (3), front end housing (2), rear end cap (6), tachogenerator (1), rotating shaft (8), external rotor (4), stator (5), it is characterized in that: rotating shaft (8) is contained in casing (3) internal support in front end housing (2), between the bearing in the rear end cap (6), external rotor (4) is positioned at casing (3) internal fixation in rotating shaft (8), the overarm that stator (5) is positioned at external rotor (4) fixes by carriage (9) and rear end cap (6), and stator (5) has the stator core (10) of line embedding groove (11) by the outer ring and is embedded in the interior threephase stator winding (7) of line embedding groove (11) to be formed.

Fig. 1 is the utility model structural representation;

Fig. 2 is the front view of the utility model stator core (10);

Fig. 3 is the left view of the utility model stator core (10).

The utility model is described in further detail with reference to the accompanying drawings.

Accompanying drawing has provided an embodiment of the present utility model.

Rotating shaft (8) is contained in casing (3) internal support in front end housing (2), between the radial ball bearing in the rear end cap (6), tachogenerator (1) is contained in and is positioned at outside the casing (3) in the rotating shaft (8), external rotor (4) is positioned at casing (3) and is fixed in the rotating shaft (8) with flat key, stator (5) is positioned at the overarm of external rotor (4), use bolt by carriage (9) and rear end cap (6), stator (5) is fixed on the carriage (9) with two back-up rings, and stator (5) has the stator core (10) of line embedding groove (11) by the outer ring and is embedded in the interior threephase stator winding (7) of line embedding groove (11) to be formed.

Operation principle of the present utility model is as follows: threephase stator winding (7) is inserted three phase mains, stator (5) produces rotating magnetic field on every side, external rotor (4) is in the rotating magnetic field, induction, produce eddy current, this eddy current and magnetic flux interact, thereby generation torque, driving rotating shaft (8) rotates, after test the speed negative feedback voltage and the given voltage of tachogenerator (1) output compares, by the trigger control three phase voltage regulating silicon controlled angle of flow, thereby the voltage of control threephase stator winding (7) reaches the purpose of controlling motor speed.

The utility model is simple in structure, only has a running clearance, mounting or dismounting and easy to maintenance, volume, weight and cost are compared with the electromagnetic speed control motor of same specification and are reduced approximately 30%, its surplus torque equals zero, there is not dead band, energy speed governing under the no-load condition, starting torque is big, and starting is steady, because starting current is little, be convenient to Fraquent start and rotating crawl, can improve the operational efficiency of motor according to the different rotating speeds reasonable selection stator winding number of poles of the various long time operations of user, be a kind of asynchronous machine of novel AC stepless variable voltage control.

Claims

1, a kind of asynchronous machine of AC stepless variable voltage control, comprise casing (3), front end housing (2), rear end cap (6), tachogenerator (1), rotating shaft (8), external rotor (4), stator (5), it is characterized in that: rotating shaft (8) is contained in casing (3) internal support in front end housing (2), between the bearing in the rear end cap (6), external rotor (4) is positioned at casing (3) internal fixation in rotating shaft (8), stator (5) is positioned at the overarm of external rotor (4), fix by carriage (9) and rear end cap (6), stator (5) has the stator core (10) of line embedding groove (11) by the outer ring and is embedded in the interior threephase stator winding (7) of line embedding groove (11) to be formed.