Patent ID: 9050961
Filing Date: 2015-06-09
Classification: B60T,F16D,G01R

Abstract:
1. A brake drive and control device for driving and controlling a brake in order to change a state of the brake from a disengaged state into an engaged state by stopping a brake drive current flowing through the brake that brakes a driven object driven in a gravity axis direction by a motor, comprising: a first switching element connected to one end of the brake and configured to switch from the off state to the on state when a switch command is input to cause a brake drive current to flow through the brake; a second switching element connected to the other end of the brake and configured to switch from the off state to the on state when the switch command is input to cause a brake drive current to flow through the brake; a voltage detection unit configured to detect a brake voltage being applied to the brake; a switch command delay unit configured to delay the switch command input to the first switching element; and a short circuit failure determination unit configured to determine whether or not a short circuit failure has occurred in the first switching element based on the brake voltage and the switch command delayed by the switch command delay unit.