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High synchronous speed difference modulation brushless doubly-fed motor

A double-fed motor and synchronous speed technology, which is applied to the shape/style/structure of electrical components, electromechanical devices, and winding conductors, can solve problems such as inapplicability, and achieve the effect of low overall cost and wide application range

Inactive Publication Date: 2020-12-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the winding design scheme of this rotor is only effective for the combination of pole pairs that is a multiple of 4, and it is not applicable if the natural synchronous speed is to be further improved

Method used

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  • High synchronous speed difference modulation brushless doubly-fed motor
  • High synchronous speed difference modulation brushless doubly-fed motor
  • High synchronous speed difference modulation brushless doubly-fed motor

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Experimental program
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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing:

[0028] Such as figure 1 As shown, the brushless double-fed motor with high synchronous speed difference modulation includes a stator 1 and a rotor 2. In the example of the present invention, a brushless double-fed motor with 54 stator slots and 36 rotor slots is selected. Select the number of pole pairs of the power winding p 1 =3, the number of pole pairs of the control winding p 2 =2.

[0029] When the number of stator slots is 54, the control winding corresponding to the three-phase regular 60° phase belt is a fractional slot winding, and the power winding is an integer slot winding. Therefore, the power winding is set as a single-layer winding, and the control winding is set as a double-layer winding. Among them, the pitch of the power winding is 9, and the pitch of the control winding is 13.

[0030] The design of the rotor winding is more complex:

[0031] First...

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Abstract

The invention relates to a high synchronous speed difference modulation brushless doubly-fed motor, and the motor comprises a stator and a rotor, and is characterized in that the stator is embedded with two sets of mutually independent power windings with the number of pole pairs of p1 and control windings with the number of pole pairs of p2; the rotor is of a winding type structure, a p1 antipodemagnetic field and a p2 antipode magnetic field are generated at the same time, and the p1 antipode magnetic field and the p2 antipode magnetic field rotate in the same direction relative to the rotor. By designing the structure of the rotor winding, high-speed operation of the brushless doubly-fed motor under the power frequency is achieved, and the brushless doubly-fed motor has the advantagesof being low in comprehensive cost and wide in application range.

Description

technical field [0001] The invention relates to the field of brushless double-fed motors, in particular to a brushless double-fed motor with high synchronous speed difference modulation. Background technique [0002] The brushless double-fed motor is derived from the cascaded induction motor and is a new type of motor with good application prospects. Unlike the synchronous speed of the traditional motor, which is only determined by a single number of pole pairs and the power supply frequency, the stator of the brushless doubly-fed motor has two sets of windings with different pole pairs and independent of each other. The motor speed is determined by the number of pole pairs of the two sets of windings. and frequency are determined together. Among them, the power winding is connected to the power grid, and the number of pole pairs is p 1 , the frequency is f 1 , the control winding is connected to the bidirectional frequency converter, and the number of pole pairs is p 2 ...

Claims

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Application Information

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IPC IPC(8): H02K29/00H02K3/12H02K3/28
CPCH02K29/00
Inventor 程源庾波阚超豪
Owner HEFEI UNIV OF TECH