Patent ID: 8272482
Filing Date: 2012-09-25
Classification: B66B

Abstract:
1. An elevator apparatus, comprising: a semiconductor switch connected in series to a brake coil for applying a braking force to a car, the semiconductor switch being for varying a current flowing through the brake coil; an interruption switch which is connected in series to the brake coil and the semiconductor switch and is capable of interrupting a current flowing through the brake coil; a braking force control processing means for controlling an amount of a current flowing through the semiconductor switch according to a deceleration of the car when the car stops; a failure detection section for detecting a failure in the braking force control processing means; a critical event detection means for detecting a critical event requiring an urgent stop of the car based on a state detection signal; and a brake power supply interrupting means for turning the interruption switch into an OFF state to apply braking when the failure is detected by the failure detection section and when the critical event is detected by the critical event detection means.