Title:
RAPID DECELERATION CONTROL METHOD AND SYSTEM FOR ASYNCHRONOUS MOTOR, AND DEVICE AND MEDIUM
Document Type and Number:
WIPO Patent Application WO/2022/133887
Kind Code:
A1
Abstract:
A rapid deceleration control method and system for an asynchronous motor, and an electronic device and a computer-readable storage medium. The method comprises: controlling, on the basis of a target current value, an output current of a frequency converter for driving an asynchronous motor to be stable, and controlling, on the basis of a target frequency value, an output voltage frequency of the frequency converter to be gradually reduced, such that energy converted into a bus voltage is reduced, wherein the target current value is a fixed value, and the target frequency value is a variable value, which is determined according to a bus voltage value of the frequency converter and is gradually reduced from an initial value. By means of the method, it is ensured that an output current of a frequency converter is stable; moreover, a target frequency value is reduced in combination with the rising situation of a bus voltage, and therefore, an asynchronous motor is continuously restored to a high-slip running state, thereby avoiding a rise in the bus voltage caused by energy generated during electric motor deceleration, effectively preventing a bus overvoltage, and greatly improving the economic benefit of a product.
Inventors:
ZHONG SHENG (CN)
Application Number:
PCT/CN2020/138960
Publication Date:
June 30, 2022
Filing Date:
December 24, 2020
Export Citation:
Assignee:
SHENZHEN INVT ELECTRIC CO LTD (CN)
International Classes:
H02P3/18; H02P23/08; H02P27/08
Foreign References:
| CN110365255A | 2019-10-22 | |||
| CN109245657A | 2019-01-18 | |||
| CN102136719A | 2011-07-27 | |||
| CN102931889A | 2013-02-13 | |||
| CN109525105A | 2019-03-26 | |||
| CN108429506A | 2018-08-21 | |||
| JP4524855B2 | 2010-08-18 | |||
| US5089760A | 1992-02-18 |
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
Download PDF: