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Phase number-variable asynchronous motor winding connecting method

A technology for asynchronous motors and stator windings, applied to asynchronous induction motors, the shape/style/structure of winding conductors, electrical components, etc., can solve problems such as small adaptability, low flexibility in use, and difficulty in changing the number of motor phases. Reduce energy consumption, change operating performance, and output power is stable and adjustable

Inactive Publication Date: 2011-08-17
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, although the existing motors have a simple structure, the number of phases of the motor is not easy to change, the scope of application is small, the flexibility of use is small, and it is difficult to meet the needs of the rapidly developing electric power industry

Method used

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  • Phase number-variable asynchronous motor winding connecting method
  • Phase number-variable asynchronous motor winding connecting method
  • Phase number-variable asynchronous motor winding connecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Connect the selected squirrel cage rotor asynchronous motor stator into a twelve-phase winding

[0020] The twelve-phase winding of this embodiment is composed of four three-phase Y-connected windings with a spatial difference of 15° electrical angle and independent midpoints. The four three-phase windings are respectively connected by A 1 B 1 C 1 、A 2 B 2 C 2 、A 3 B 3 C 3 、A 4 B 4 C 4 Indicates that A 2 phase spatially ahead of A 1 Phase 15°, and so on; the positional relationship of each phase axis of the twelve-phase stator winding in space is as follows figure 2 Shown; when the number of phases m is 12, the number of slots per pole and phase is q, If q is 1, it means that one coil group is one phase winding, then 1 and 13 are A 1 Both ends of the phase winding A 1 with X 1 , A 1 Phase winding connection see image 3 ; Similarly, draw the wiring diagrams of other phase windings, obviously 1, 2, 3, ... 24 correspond to A of each phase wi...

Embodiment 2

[0021] Example 2: Connect the selected squirrel cage rotor asynchronous motor stator into a six-phase winding

[0022] The six-phase winding of this embodiment is composed of two three-phase Y-connected windings with a spatial difference of 30° electrical angle and independent midpoints. The two three-phase windings are respectively connected by A 1 B 1 C 1 、A 2 B 2 C 2 Indicates that A 2 phase spatially ahead of A 1 Phase 30°, the spatial position relationship of each phase axis of the six-phase stator winding is as follows Figure 4 Shown; when the number of phases m is 6, the number of slots per pole and phase is q, If q is 2, it means that two coil groups are connected in series in the same direction to form a phase winding, that is, 13 and 2 are connected, then 1 and 14 are A 1 Both ends of the phase winding A 1 with X 1 , A 1 For the connection diagram of the phase winding, see Figure 5 ; Similarly, draw the wiring diagrams of other phase windings, obviousl...

Embodiment 3

[0023] Example 3: Connect the selected squirrel cage rotor asynchronous motor stator into a four-phase winding

[0024] The four-phase winding of this embodiment is composed of two two-phase windings with a spatial difference of 45° in electrical angle, and the four-phase windings are respectively divided into A 1 B 1 、A 2 B 2 Indicates that A2 phase spatially ahead of A 1 Phase 45°, B 1 phase spatially ahead of A 1 Phase 90°; the position relationship of each phase axis of the four-phase stator winding in space is as follows Figure 6 Shown; when the number of phases m is 4, the number of slots per pole and phase is q; If q is 3, it means that 3 coil groups are connected in series in the same direction to form a phase winding, that is, 13 is connected with 2 phases, and 14 is connected with 3 phases, then 1 and 15 are A 1 Both ends of the phase winding A 1 with X 1 , A 1 For the connection diagram of the phase winding, see Figure 7 ; In the same way, the wiring d...

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Abstract

The invention belongs to the technical field of asynchronous motor structure designing, and relates to a phase number-variable cage rotor asynchronous motor winding connecting method. In the method, a phase number is changed by changing a stator winding coil connecting way. A rotor structure and a stand structure are the same as those of a conventional cage rotor asynchronous motor. A stator winding coil adopts different connecting ways. Double-layer winding coils at the same positions of each pole of the stator are connected at first to form coil units, and the front and tail ends of each coil unit are all led out and connected to form asynchronous motor structures with different phase numbers by the same set of windings to further realize the phase number variability and multifunction of the asynchronous motor. Power is supplied by a three-phase constant frequency constant voltage power supply or an inverter power supply. By the method, the motor is endowed with the flexibly variable phase number, stable and adjustable output frequency, and applicability to a plurality of power supply types, the running performance of the conventional motor can be effectively changed, and energyconsumption is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of asynchronous motor structure design, and relates to a stator winding connection method of a squirrel-cage rotor asynchronous motor whose phase number is changed by changing the coil connection mode of the stator winding. Background technique: [0002] Among the various electric motors at present, the squirrel-cage rotor asynchronous motor has the characteristics of simple structure, reliable operation, and convenient maintenance, and is widely used in modern industrial production. Since the traditional AC power supply is a symmetrical three-phase AC power supply, the corresponding number of phases of the asynchronous motor is three-phase. The fixed phase number of the motor is due to the design concept and connection method of the motor stator winding. During the production process of the stator winding of the fixed-phase asynchronous motor, the connection between the coils is completed inside the stator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/16H02K3/28
Inventor 吴新振李嘉杨乐梅傅乐
Owner QINGDAO UNIV