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Multi-phase high-speed AC motor system

An AC motor, high-speed technology, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problem of large harmonic components of the stator current, achieve strong fault tolerance, improve efficiency, and eliminate pulsating torque effects

Active Publication Date: 2016-09-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is to solve the problem of large harmonic components in the stator current of the existing small inductance motor, and now provides a multi-phase high-speed AC motor system

Method used

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  • Multi-phase high-speed AC motor system
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  • Multi-phase high-speed AC motor system

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specific Embodiment approach 1

[0025] Embodiment 1: The multi-phase high-speed AC motor system described in this embodiment includes: an m-phase high-speed AC motor and m / 3 three-phase power converters, wherein m is the phase number of the motor, m=3k, k is a positive integer greater than 1;

[0026] The m-phase high-speed AC motor includes a stator and a rotor;

[0027] The stator includes: m / 3 sets of three-phase annular windings and annular iron cores, the phase difference between the corresponding phases of adjacent two-phase annular windings in each set of three-phase annular windings is δ electrical angle, and δ satisfies δ=±180° / m; each set of three-phase toroidal windings is star-connected, and the three output terminals of each three-phase winding are respectively connected to the three AC input terminals of a three-phase power converter in one-to-one correspondence;

[0028] m / 3 three-phase power converters share a DC bus, and the output currents of the corresponding phases of two adjacent three...

specific Embodiment approach 2

[0031] Embodiment 2: The multi-phase high-speed AC motor system described in this embodiment includes: an m-phase high-speed AC motor and an m-phase power converter, wherein m is the phase number of the motor, and m is a natural number greater than or equal to 5 ;

[0032] The m-phase high-speed AC motor includes a stator and a rotor;

[0033] The stator includes: m-phase annular windings and annular iron cores, the phase difference between adjacent two-phase annular windings is δ electrical angle, and δ satisfies δ=±360° / m; the output ends of each phase of the m-phase annular windings are respectively It is connected to an AC input terminal of the m-phase power converter in one-to-one correspondence; the output current difference between adjacent phases of the m-phase power converter is δ electrical angle;

[0034] The inner side wall of the annular iron core is provided with Z slots, and the outer side wall is provided with y slots. The slots on the inner side wall and the ...

specific Embodiment approach 3

[0035] Specific embodiment three: This embodiment is to further illustrate the multi-phase high-speed AC motor system described in specific embodiment one or two. In this embodiment, when the number of slots on the inner side wall of the annular core is Z=2mp, where p is The number of pole pairs of the m-phase high-speed AC motor;

[0036] Z=y, and the grooves on the inner wall and the grooves on the outer wall correspond one by one;

[0037] The m-phase annular winding is embedded in the slot on the inner side wall of the annular core, and the m-phase annular winding is a single-layer structure. Only one effective side of a rectangular coil is embedded in each inner side wall slot, and the opposite side of the effective side of the rectangular coil is embedded. in the outer wall groove corresponding to the inner wall groove.

[0038] In practical applications, according to the multi-phase high-speed AC motor system structure described in this embodiment, when m=6, as figur...

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Abstract

The invention provides a multiphase high-speed alternating current motor system, belongs to the field of motors and aims at the problem that current of an existing small inductance motor stator is large in harmonic component. A multiphase high-speed alternating current motor and a multiphase power converter form a multiphase high-speed motor driving system, the outer surface of a stator iron core is slotted and a non-effective edge of a coil is embedded into a slot so as to improve leakage inductance of windings, harmonic current of a stator is inhibited, various loss caused by the harmonic current is further reduced, the motor efficiency is improved, the motor temperature rise is reduced, and the service life of the motor is prolonged. In addition, the multiphase high-speed alternating current motor system fully utilizes driving characteristics of double inverter of a six-phase motor, eliminates pulsating torque caused by a harmonic field, enables consumption of the rotor iron core and a permanent magnet to be greatly reduced, reduces motor vibration and noise, improves the system stability and dynamic and static characteristics of the system and is suitable for inhibition of the harmonic current of the stator.

Description

technical field [0001] The invention belongs to the field of motors, in particular to an AC motor system. Background technique [0002] High-speed motors have outstanding advantages such as high speed, high power density, high efficiency, small size, light weight, etc., and have attracted more and more attention from the industry. Centrifugal compressors and blowers, micro gas turbines, high-speed starter generators and other systems. [0003] According to the structural characteristics and operating state requirements of high-speed motors, the stator winding inductance of high-speed permanent magnet synchronous motors is relatively small. Theoretical analysis and experiments show that reducing the winding inductance is beneficial to improve the dynamic response of the stator current, but it will bring many adverse effects to the motor drive control system. If a three-phase voltage-type PWM inverter with a switching frequency of several kHz is used to directly drive this t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/33H02K3/28H02K1/16H02K11/00
Inventor 寇宝泉曹海川陈宇声尹相睿谢逸轩
Owner HARBIN INST OF TECH
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