Patent ID: 6311801
Filing Date: 2001-11-06
Classification: B66B

Abstract:
A brake control apparatus for an elevator, comprising:control means for controlling raising and lowering of an elevator cage;brake means, having a brake wheel on a rotary shaft of a drive motor of a hoisting machine for raising and lowering the elevator cage, for braking rotation of the drive motor by clamping the brake wheel with a lining attached to a plunger biased by a spring, and releasing the brake wheel by retracting the plunger against force of the spring by supplying energy to a brake coil wound around the plunger;brake releasing means for exciting the brake coil by supplying energy to the brake coil based on an instruction from the control means to release the brake wheel; andauxilary power source means for storing energy for driving the brake coil, and exciting the brake coil by supplying stored energy to said brake releasing means upon release of the brake wheel.