US 12,469,627 B2
Control circuit and control method of bistable permanent magnet mechanism
Qing Yang, Shanghai (CN); Xiaoqiang Li, Shanghai (CN); Baoyun Bi, Shanghai (CN); Yuchun Guo, Shanghai (CN); Zuoren Wu, Shanghai (CN); and Xiaohang Chen, Shanghai (CN)
Assigned to Schneider Electric (China) Co., Ltd., Beijing (CN)
Filed by Schneider Electric (China) Co., Ltd., Beijing (CN)
Filed on Nov. 29, 2023, as Appl. No. 18/522,496.
Claims priority of application No. 202311160056.9 (CN), filed on Sep. 8, 2023.
Prior Publication US 2025/0087398 A1, Mar. 13, 2025
Int. Cl. H01H 47/00 (2006.01); H01F 7/02 (2006.01); H01F 7/06 (2006.01)
CPC H01F 7/064 (2013.01) [H01F 7/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A control circuit of a bistable permanent magnet mechanism, wherein the bistable permanent magnet mechanism comprises a coil, and the control circuit comprises:
a first switch, a second switch, a third switch, a fourth switch, a fifth switch, and a diode, wherein a first end of the first switch, a first end of the third switch, and a negative electrode of the diode are connected with a power supply, wherein a second end of the first switch is connected with a first end of the coil, wherein a second end of the third switch is connected with a second end of the coil, wherein a first end of the second switch is connected with the first end of the coil, wherein a first end of the fourth switch is connected with the second end of the coil, wherein a second end of the second switch, a second end of the fourth switch and, a positive electrode of the diode are connected with a first end of the fifth switch, and wherein a second end of the fifth switch is grounded; and
a control unit for controlling turn-on and turn-off of the first switch, the second switch, the third switch, the fourth switch, and the fifth switch, wherein,
the control unit controls the first switch, the fourth switch and, the fifth switch to be turned on and the third switch and the second switch to be turned off in order to provide a positive current to the coil, and when the control unit is needed to stop providing the positive current to the coil, the control unit controls the fifth switch to be turned off and then controls the first switch and the fourth switch to be turned off; and
the control unit controls the third switch, the second switch and, the fifth switch to be turned on and the first switch and the fourth switch to be turned off in order to provide a reverse current to the coil, and when the control unit is needed to stop providing the reverse current to the coil, the control unit controls the fifth switch to be turned off and then controls the third switch and the second switch to be turned off.