2 results about "Short circuit" patented technology

The invention provides a test method and device for a motor active short-circuit relay, and a storage medium. The method includes the steps: performing the zero speed detection of a motor after a motor controller completes a low-voltage power-on operation, wherein when the motor controller is powered down, a first relay and a second relay are both switched on; controlling the second relay to be turned on if the motor passes the zero speed detection, and injecting a first excitation signal at the control ends of a first phase winding and a third phase winding through the motor controller; performing injection detection of the first excitation signal to determine whether the first excitation signal is successfully injected or not; controlling the first relay to be turned on if the first excitation signal is successfully injected, and obtaining a voltage across two ends of the first relay; and judging whether the power-on test of the first relay is successful or not according to the voltage across two ends of the first relay. The method can realize the turn-on test of the short-circuit relay, and ensures the reliability of the active short-circuit function of the vehicle motor duringdriving.

The invention relates to a wire clamp for the short-circuit ground protection of an electrical device, and more particularly to a wire clamp for satisfying the short-circuit ground protection of conductors arranged from horizontal to vertical angles. The wire clamp comprises a clamping device and a transmission device. The clamping device includes: a clamping block, a multifunctional connection sleeve, and a linear displacement device. The transmission device comprises: a base body, a force-applying rod, a force transmission arm, and a support arm. The wire clamp successfully enables a workerto hang the short-circuit ground wire of a conductor arranged non-horizontally, particularly a vertically downwardly arranged conductor, on the ground. The wire clamp reduces the labor intensity of the workers to a great extent, improves the work efficiency, and eliminates the hidden safety problems caused by the climbing operations.