Title:
ELECTRONIC POLE CHANGING-BASED INDUCTION MOTOR CONTROL SYSTEM AND CONTROL METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/129819
Kind Code:
A1
Abstract:
An electronic pole changing-based induction motor control system and a control method thereof. The induction motor control system comprises an induction motor, an inverter, and a direct current power supply. The inverter is connected to the motor and the direct current power supply respectively, and is used for converting direct current provided by the direct current power supply into alternating current supplied to the motor. The motor comprises N three-phase windings (11, 12; 31, 32). The inverter comprises N inverter driving units (21, 22; 41, 42) and at least one control unit. Each inverter driving unit is connected to a three-phase winding. The control unit controls the inverter driving units to generate current for the three-phase windings connected to the inverter driving units, the frequency, the amplitude, and the phase of the current being controlled by the control unit. The control unit changes current directions or phase angles of at least part of the three-phase windings according to a synchronous rotational speed of the motor, so that the N three-phase windings form at least two numbers of pole pairs. The induction motor control system increases the low-speed torque, and broadens a speed adjusting operation scope, thereby improving the control precision and the operation efficiency, and simplifying a peripheral transmission mechanism.
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Inventors:
ZHANG JING (CN)
Application Number:
PCT/CN2017/079531
Publication Date:
July 19, 2018
Filing Date:
April 06, 2017
Export Citation:
Assignee:
ZHANG JING (CN)
International Classes:
H02P25/20
Domestic Patent References:
| WO2016114353A1 | 2016-07-21 |
Foreign References:
| CN101734174A | 2010-06-16 | |||
| CN106549621A | 2017-03-29 | |||
| CN206323324U | 2017-07-11 |
Attorney, Agent or Firm:
YOGO PATENT & TRADEMARK AGENCY LIMITED COMPANY (CN)
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