METHOD AND CIRCUIT FOR MUTING ELECTROMAGNETIC INTERFERENCE DURING MANEUVERING OF A DEVICE

摘要

A switching circuit includes a first switch and a second switch respectively connecting a first terminal and a second terminal of an electrical coil to a positive terminal of a voltage source, a third switch and a fourth switch respectively connecting the first terminal and the second terminal of the electrical coil to a negative terminal of the voltage source, and a controller to control the switching circuit in a current control mode to alternate a voltage polarity of the voltage source to thereby control a magnitude and direction of the electrical current of the electrical coil, and to control the switching circuit in a current hold mode to disconnect the electrical coil from the voltage source and to short-circuit the electrical coil to maintain the magnitude and direction of the electrical current at the transition time when the switching circuit switched to the current hold mode.

主权项

1. A method for controlling an electrical current of an electrical coil, comprising:
for an electrical coil connected to a voltage source via a switching circuit, transitioning a state of the switching circuit between,
a current control mode of operation in which the switching circuit alternates a voltage polarity of the voltage source to thereby control a magnitude and direction of an electrical current of the electrical coil, anda current hold mode of operation in which the switching circuit disconnects the electrical coil from the voltage source and short-circuits the electrical coil to maintain the magnitude and direction of the electrical current of the electrical coil at a transition time between the current control mode and the current hold mode.