Control circuit and control method of bistable permanent magnet mechanism

A control method for 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;
• 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;
• the control method comprises:
• controlling, by the control unit, 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, controlling the fifth switch to be turned off and then controlling the first switch and the fourth switch to be turned off, by the control unit;
• and
• controlling, by the control unit, 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, controlling the fifth switch to be turned off and then controlling the third switch and the second switch to be turned off, by the control unit.