Title:
LINEAR MOTOR DRIVE CHIP BRAKING METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/147742
Kind Code:
A1
Abstract:
A linear motor drive chip braking method and apparatus, the method comprising: when the value of a first enabling signal is a first preset value and the time for which a counter-electromotive force is not over zero is shorter than or equal to a first set time, determining whether the value of the counter-electromotive force is lower than a rapid braking threshold; when the value of the counter-electromotive force is not lower than the rapid braking threshold, braking a linear motor according to the amplitude of a first braking pulse; when the value of the counter-electromotive force is lower than the rapid braking threshold, the value of a second enabling signal is a second preset value, and the time for which the counter-electromotive force of the linear motor is not over zero is shorter than or equal to a second set time, determining whether the value of the counter-electromotive force is lower than a fine-tuning braking threshold; when the value of the counter-electromotive force is not lower than the fine-tuning braking threshold, braking the linear motor according to the amplitude of a second braking pulse, the amplitude of the second braking pulse being smaller than the amplitude of the first braking pulse; and when the value of the counter-electromotive force is lower than the fine-tuning braking threshold, ending an automatic braking action, which achieves rapid and effective braking for the linear motor.
Inventors:
ZHAO GUANXING (CN)
WU SHAOFU (CN)
CHENG JIANTAO (CN)
DU LIMING (CN)
SUN HONGJUN (CN)
WU SHAOFU (CN)
CHENG JIANTAO (CN)
DU LIMING (CN)
SUN HONGJUN (CN)
Application Number:
PCT/CN2020/072201
Publication Date:
July 23, 2020
Filing Date:
January 15, 2020
Export Citation:
Assignee:
SHANGHAI AWINIC TECHNOLOGY CO LTD (CN)
International Classes:
H02P3/06; H02P25/06
Domestic Patent References:
| WO2012122443A1 | 2012-09-13 |
Foreign References:
| CN109713944A | 2019-05-03 | |||
| CN107024985A | 2017-08-08 | |||
| CN108429507A | 2018-08-21 | |||
| CN104020844A | 2014-09-03 | |||
| CN105630021A | 2016-06-01 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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