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Three-winding parallel single-phase induction motor

An induction motor, parallel-connected technology, applied in the field of motors, can solve the problems of single-phase motor air gap magnetic field asymmetry, single-phase induction motor large volume, high negative sequence magnetic field content, etc., to improve efficiency and power factor, reduce iron core The effect of simple size and wiring method

Inactive Publication Date: 2011-04-06
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Single-phase induction motors only need single-phase AC power supply, and are widely used in industry, agriculture, transportation, medical equipment, and household appliances. However, compared with three-phase induction motors of the same capacity, single-phase induction motors are large in size and low in efficiency
The main reason is that the air gap magnetic field of the single-phase motor is seriously asymmetrical, and the negative sequence magnetic field content is high, resulting in a waste of energy

Method used

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] figure 1 , figure 2 , image 3 Among them, the three-winding parallel-connected single-phase induction motor includes a casing, a front end cover 10 and a rear end cover 2 are provided at both ends of the casing, and a wind cover 11 is provided at the front end cover 10, and a fan 12 is installed in the wind cover 11.

[0017] A bearing 1 is arranged on the rear end cover 2 and the front end cover 10 , and the rotating shaft 3 is mounted on the bearing 1 . The squirrel-cage rotor 7 is installed on the rotating shaft 3 and cooperates with the stator core 5 . Also be provided with on casing and hang and climb 6. A stator winding 8 is provided on the stator core 5 , and the stator winding 8 is connected to the outlet box 4 . A base 9 is provided between the front end cover 10 and the windshield 11 .

[0018] In the present invention, the stat...

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Abstract

The invention relates to a three-winding parallel single-phase induction motor. A stator winding of the single-phase induction motor adopts a three-winding parallel connection mode, so when the single-phase induction motor operates under a rated load, the single-phase induction motor has an approximately symmetrical air gap field, has the efficiency closer to that of a same-capacity three-phase induction motor and higher power factor and is small in volume and light in weight. The single-phase induction motor comprises a shell, wherein a stator is arranged inside the shell; a rotor is arranged on a rotating shaft; the stator winding is divided into three phases A, B and C which spatially form an angle of 120 degrees respectively in turn; the phase B and the phase C are respectively connected in series with a respective capacitor; and the phase A is connected in parallel with the phase C and is reversely connected in parallel with the phase B to form a composite parallel branch so as to be connected to a single-phase power supply.

Description

technical field [0001] The invention relates to a motor, in particular to a three-winding parallel single-phase induction motor with a stator. Background technique [0002] Single-phase induction motors only need single-phase AC power supply, and are widely used in industry, agriculture, transportation, medical equipment, and household appliances. However, compared with three-phase induction motors of the same capacity, single-phase induction motors are large in size and low in efficiency. The main reason is that the air gap magnetic field of the single-phase motor is seriously asymmetrical, and the negative sequence magnetic field content is high, resulting in a waste of energy. Contents of the invention [0003] The object of the present invention is to realize the air gap magnetic field symmetry of single-phase induction motor, and propose a three-winding parallel single-phase induction motor, which adopts three-winding parallel connection mode for the stator winding of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/08
Inventor 王秀和裴英
Owner SHANDONG UNIV
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