Elevator system with control signal isolation during safe torque off

Abstract

An elevator power system for an elevator system, the elevator power system including an inverter configured to provide drive signals to a motor to impart motion to an elevator car; a power controller configured to generate control signals used to control the inverter; an isolation module positioned between the power controller and the inverter, the isolation module configured to prevent the control signals from reaching the inverter in response to a safe torque off mode of the elevator system.

Dependencies are inferred from the claim text.