Title:
STAR-CONNECTION CIRCUIT DESIGN METHOD FOR ELEVATOR PERMANENT MAGNET SYNCHRONOUS TRACTION MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/088229
Kind Code:
A1
Abstract:
A star-connection circuit design method for an elevator permanent magnet synchronous traction motor, comprising: obtaining a plurality of torque-speed curves respectively corresponding to different series resistance values R1, R2, R3, R4 and R5 when a permanent magnet synchronous traction motor (20) is braked in a short circuit mode by means of a star-connection circuit; calculating a braking torque T required by an elevator, and making an equal torque line which is equal to the braking torque T required by the elevator on the plurality of torque-speed curves, wherein the equal torque line has left and right intersection points with each torque-speed curve, the speed corresponding to the left intersection point is the lowest braking speed V0 of the permanent magnet synchronous traction motor, and the speed corresponding to the right intersection point is the highest braking speed V1 of the permanent magnet synchronous traction motor; and selecting one from among the torque-speed curves in which the highest braking speed V1 is greater than the highest running speed V permitted by the elevator, and setting the series resistance value R2 corresponding to the selected torque-speed curve as the resistance value R2 of a series resistor. Therefore, the design method may select a series resistor that has an appropriate resistance value, thus improving the safety of the elevator.
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Inventors:
HE JIAN (CN)
HE DONGLIN (CN)
HE DONGLIN (CN)
Application Number:
PCT/CN2019/128291
Publication Date:
May 14, 2021
Filing Date:
December 25, 2019
Export Citation:
Assignee:
SCHINDLER CHINA ELEVATOR CO LTD (CN)
International Classes:
B66B5/02; B66B11/04; H02P3/22
Foreign References:
| CN1127441A | 1996-07-24 | |||
| CN1553878A | 2004-12-08 | |||
| CN103095189A | 2013-05-08 | |||
| CN1138776A | 1996-12-25 | |||
| US5847533A | 1998-12-08 | |||
| EP2672622A1 | 2013-12-11 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
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