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Brake control device for elevator

A control device and brake technology, used in transportation, packaging, elevators, etc., can solve the problems of the first contact becoming larger, it is difficult to reduce the sound of the brake operation, and the effect of reducing the cutting capacity is achieved.

Active Publication Date: 2010-03-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned brake control device described in Patent Document 1, when the chopper circuit fails to be turned on, the first contact must be used to interrupt the DC current flowing to the brake coil, so there is a problem that the first contact becomes larger.
[0009] In addition, in the brake control device described in Patent Document 2, since the voltage applied to the brake coil is not chopped, there is a problem that it is difficult to reduce the operating sound of the brake as disclosed in International Publication WO2004 / 028945.

Method used

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  • Brake control device for elevator
  • Brake control device for elevator
  • Brake control device for elevator

Examples

Experimental program
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Embodiment approach 1

[0022] use figure 1 and figure 2 One embodiment of the present invention will be described. figure 1 is an overall view showing an elevator brake control device according to an embodiment of the present invention, figure 2 yes figure 1 The internal structure diagram of the brake drive unit is shown.

[0023] exist figure 1 Among them, the elevator control device has a motor control unit 5 connected to a three-phase AC power supply 3 through a non-fuse circuit breaker 4 . The motor control part 5 is formed to apply a three-phase AC voltage of variable voltage and variable frequency to the three-phase motor 9, and drives the three-phase motor 9 to rotate the sheave 13, thereby moving the rope 15 hanging on the sheave 13 up and down , make the counterweight 17 that is fixed on one end of rope 15, the car 19 that is fixed on the other end of rope 15 lift.

[0024] The three-phase motor 9 is restrained / released by a brake 10 configured to control the current flowing to the ...

Embodiment approach 2

[0053] use Figure 4 Another embodiment of the present invention will be described. Figure 4 It is an internal configuration diagram showing a brake drive unit according to another embodiment. exist Figure 4 in, use with figure 2 The same reference numerals denote the same parts, and explanations thereof are omitted.

[0054] exist Figure 4 Among them, the drive unit 120 of the brake connects the cathode side of the first freewheel diode 101 as the first return unit to the cathode side of the rectifier diode 31, and connects the anode side of the first freewheel diode 101 to the other side of the secondary winding 25b of the transformer 25. One end is connected, and the other end of the brake coil 52 is also connected. The second freewheel diode 47 is connected to the brake coil 52 through the second freewheel resistor 103 .

[0055] In addition, the second recirculation means is composed of a second recirculation diode 47 and a second recirculation resistor 103 .

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PUM

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Abstract

A brake control device for an elevator controls the voltage between the terminals of a brake coil (52) of the elevator, thereby controlling its brake operation. The brake control device comprises a transformer (25) having a primary coil (25a), one end of which is connected to a DC power supply, and a secondary coil (25b), a semiconductor switch element (27) connected to the other end of the primary coil (25a) of the transformer (25) and switching on or off the DC voltage applied to the transformer (25), a rectifier diode (31) for rectifying an AC voltage generated from the secondary coil (25b)of the transformer (25), and the brake coil (52) connected from the output of the rectifier diode (31) to the secondary coil (25b) through a normally-open contact point (33).

Description

technical field [0001] The present invention relates to a brake control device for an elevator. Background technique [0002] Conventional elevator brake control devices are described in the following patent document 1. The brake control device controls the operation of the brake by controlling the voltage between the terminals of the brake coil of the elevator. The brake control device has a first contact connected to the between a brake coil and a chopper circuit for chopping control of said inter-terminal voltage; and a discharge circuit consisting of a circuit comprising a parallel circuit of resistive and capacitive elements connected in parallel with said brake coil, In order to make the current of the brake coil flow back when the first contact is opened. [0003] According to such a brake control device, it is possible to immediately actuate the brake when the elevator stops in an emergency, and at the same time, it is possible to reduce the surge voltage generated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/32
CPCB66B1/32
Inventor 石川纯一郎
Owner MITSUBISHI ELECTRIC CORP