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Elevator band-type brake power supply

A technology of power supply and elevator, applied in the direction of hoisting device, etc., can solve the problems of large inrush current and high withstand voltage requirements, and achieve the effect of prolonging the service life and reducing the failure rate.

Active Publication Date: 2015-07-01
重庆顺心仪器设备有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The advantage of adopting the above technical solution is that it meets the control requirements of the brake coil. The disadvantage is that the set timing circuit is triggered by the on-off of the input terminal of the brake power supply. The input terminal of the brake power supply needs to be connected frequently during the elevator operation On and off, the surge current at the moment of turning on is relatively large, and the back EMF voltage of the brake coil at the moment of turning off has high requirements on the withstand voltage of the circuit components connected to it

Method used

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  • Elevator band-type brake power supply
  • Elevator band-type brake power supply
  • Elevator band-type brake power supply

Examples

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Embodiment Construction

[0017] exist figure 1 Among them, the input of the circuit is the power supply 1, which is DC110V direct current, and the output is the brake coil power terminal 6, which is connected to the brake coil through the moving contact of the brake contactor of the elevator control system. The current detection circuit 2 monitors the change of the output current, and can output a signal that the brake coil power terminal 6 connects the load each time. When there is no load connection signal, the output pulse width of the PWM control and drive circuit 11 is 90%-96% (can be set), and the DC chopper circuit 5 is driven to output a high voltage. When the load is connected, the initial voltage is the high voltage output by the DC chopper circuit 5; the current detection circuit 2 outputs the load connection signal, which triggers the timer of the delay step-down switching circuit 3 to start counting, and after 1.5 seconds (can be set After setting), the pulse width control voltage of the...

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Abstract

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.

Description

technical field [0001] The invention relates to electrical equipment of an elevator, in particular to a control power supply device used for powering the brake coil of an elevator electromagnetic brake. Background technique [0002] The elevator brake is one of the most important safety devices for elevator products. The national standard GB / T24478-2009 "Elevator Traction Machine" requires the power supply of the elevator brake brake coil: "The minimum pull-in voltage and the maximum release voltage should be lower than 80% and 55% of rated voltage". According to the requirements of the above-mentioned technical standards and the electromagnetic characteristics of the brake coil, the elevator control system in the prior art adopts the technical scheme of high-voltage excitation pull-in and low-voltage hold. (60%-80%) rated voltage power supply, usually by connecting a current-limiting resistor in series in the power supply line or using a DC chopping method to switch betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D5/30
CPCB66D5/30B66D2700/03
Inventor 刘培
Owner 重庆顺心仪器设备有限公司
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