| 摘要 |
The present invention relates to a brake control system (1) for a lift car, comprising an electric motor which drives the car and at least two no-current electromagnetic brakes (4, 5) that block the rotation of the motor shaft, the system comprising: terminals (Brake1, Brake2) for connection to the brakes, to an electric power supply (2) for the brakes, and to various inputs (10, T1, T2, 12, 14, 16, 25, 26, 27) for controlling and/or indicating the status of the lift car and/or of the motor, and an electronic circuit electrically connected to said terminals, this electronic circuit being designed to control the operation of the brakes according to various modes of operation including: a normal mode of operation in which the brakes (4, 5) are powered by said electric power supply (2), the opening of the brakes being controlled by a corresponding control input (10), a test mode in which one or other of the brakes can be held open by being constantly powered, by action on a corresponding test input (T1; T2) whereas the status of the other brake is controlled by said control input (10), an emergency mode, triggered by action on an input (12) referred to as the emergency input, the switch to emergency mode inhibiting the control input (10) and the test inputs (T1; T2). |
