Schneider Electric (china) Co., Ltd.

Schneider Electric Industries Sas

Baoyun Bi

Xiaoqiang Li

Kun Liu

Qing Yang

Xiaohang Chen

Jian Qiu

Zhibao Wang

Zuoren Wu

Yuchun Guo

Qinghong Zhang

The present disclosure provides a control circuit and a control method of a bistable permanent magnet mechanism. The control circuit includes five switches, a diode and a control unit for controlling the five switches to be turned on and turned off. The control circuit enables the positive and the negative of the current passing through the coil to be adjustable at any time and avoids load breaking, without a complicated design of a driving circuit, thereby reducing the cost. It can also realize PWM control, adapt to a larger current range and different bistable permanent magnet mechanisms, and has a wide range of application scenarios.

Control circuit and control method of bistable permanent magnet mechanism

Embodiments of the present disclosure provides a drawer assembly, the drawer assembly includes a drawer. The drawer includes a housing and a connecting part and a limiting groove disposed on an outer wall of the housing, the size of an end of the connecting part away from the housing being greater than the size of an end of the connecting part adjacent to the housing; and a handle detachably connected to the drawer, the handle includes a fixed gripping portion and a limiting portion, a connecting groove being disposed at an end of the fixed gripping portion adjacent to the housing, a snap-on part being disposed within the connecting groove, the limiting portion passing through the fixed gripping portion and being movable towards or away from the housing, wherein in a case that an end of the limiting portion adjacent to the housing moves to the inside of the limiting groove, an end of the connecting part adjacent to the housing is fitted with the card connecting part, so that the connecting part is limited within the connecting groove.

Drawer assembly

Embodiments of the present disclosure provide method, controller and system for regulating a current of a coil. The method comprises: obtaining a first sample value of the current of the coil at a first moment, the first sample value being associated with a duty cycle of a PWM signal applied to a control end of a switch and the switch being coupled in series with the coil; obtaining a second sample value of the current of the coil at a second moment; determining a difference value between the first and the second sample values; and updating the duty cycle of the PWM signal based on the difference value to regulate the current of the coil. According to embodiments of the present disclosure, the inrush current of the coil generated at the moment of closing the contactor can be limited to a target current value, so as to increase the service life of the contactor.

Method, controller and system for regulating a current of a coil

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Shanghai, China

Baoyun Bi