The invention discloses an elevator band-type brake power supply. The elevator band-type brake power supply is provided with a band-type brake coil pull-in voltage and sustaining voltage conversion circuit, a timer of a delayed step-down switching circuit (3) is triggered by means of the change of line current when a band-type brake coil is switched on, a current detection circuit (2) is connected with the delayed step-down switching circuit (3), the delayed step-down switching circuit (3) is connected with a PWM control and driving circuit (4), and the PWM control and driving circuit (4) is connected with a DC chopper circuit (5). Low-side current detection is adopted for the current detection circuit (2), and a current sampling resistor is connected to the negative electrode of the elevator band-type brake power supply in series.
Elevator band-type brake power supply
2015-07-01
Patent
Electronic Resource
English
IPC: | B66D Haspeln , CAPSTANS |
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