Patent ID: 7918320

Claim:
An emergency stop system for an elevator, comprising: a state sensor for detecting an operation of a car; a brake device for braking the car; a brake controller for outputting a signal for operating the brake device based on a signal detected by the state sensor; and an uninterruptible power supply device for supplying electric power to the state sensor, the brake device, and the brake controller, wherein: the brake controller includes: a signal processing/calculating unit for calculating deceleration of the car based on the signal detected by the state sensor, a command value calculating unit for calculating a command value for operating the brake device based on the deceleration of the car, which is calculated by the signal processing/calculating unit, and a power monitoring device for monitoring state of the uninterruptible power supply device; and at least one of the state sensor, the signal processing/calculating unit, and the command value calculating unit has a plurality of independent systems.