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Elevator control apparatus

A technology of elevator control device and power conversion device, which is applied in overload protection devices, transportation and packaging, elevators, etc., and can solve problems such as fluctuations and malfunction levels.

Active Publication Date: 2018-10-09
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the gate voltage (Vge) may fluctuate to a malfunction level through the feedback capacitance due to a sudden voltage fluctuation between the collector and the emitter during switching.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0028] figure 1 It is a figure which shows the structure of the elevator control apparatus of 1st Embodiment.

[0029] The elevator in this embodiment includes a drive device 10 and an elevator control device 20 . The drive device 10 has a converter device 11 , a smoothing capacitor 12 , and an inverter device 13 , and supplies electric power required to drive the hoisting machine 2 in accordance with a drive instruction from the elevator control device 20 .

[0030] The converter device 11 converts the AC voltage supplied from the commercial power supply 1 into a full-wave rectified DC. The commercial power supply 1 includes a three-phase AC power supply. The smoothing capacitor 12 is provided between the DC bus between the converter device 11 and the inverter device 13 , smoothes the ripples included in the DC voltage converted by the converter device 11 and supplies it to the inverter device 13 . As the smoothing capacitor 12, for example, an aluminum electrolytic capaci...

no. 2 Embodiment approach

[0047] Next, a second embodiment will be described.

[0048] In the second embodiment, in addition to the configuration of the above-mentioned first embodiment, a voltage threshold and a time threshold that are gate voltage abnormality determination conditions are variably controlled according to the operation of the elevator.

[0049] Figure 5 It is a figure which shows the structure of the elevator control apparatus of 2nd Embodiment. In addition, with respect to the above-mentioned first embodiment figure 1 The same parts are denoted by the same reference numerals, and description thereof will be omitted.

[0050] In the elevator control device 20 of the second embodiment, in addition to the gate voltage detection unit 21 , the abnormality determination unit 22 , and the protection operation unit 23 , a threshold value variable control unit 24 is further provided. The threshold variable control unit 24 variably controls the voltage threshold Vth and the time threshold T...

no. 3 Embodiment approach

[0057] Next, a third embodiment will be described.

[0058] In the third embodiment, in addition to the configuration of the above-mentioned first embodiment, an abnormality determination is performed taking into account the inclination of the gate voltage.

[0059] Figure 7 It is a figure which shows the structure of the elevator control apparatus of 3rd Embodiment. In addition, with respect to the above-mentioned first embodiment figure 1 The same parts are denoted by the same reference numerals, and description thereof will be omitted.

[0060] In the elevator control device 20 of the third embodiment, in addition to the gate voltage detection unit 21 , the abnormality determination unit 22 , and the protection operation unit 23 , an inclination detection unit 25 and a threshold value variable control unit 26 are further provided. The inclination detection unit 25 detects the inclination angle θ of the gate voltage Vge when the semiconductor switching element 13a is ene...

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PUM

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Abstract

When abnormal state of a semiconductor switch element is detected during operation of an elevator, the protection action is started immediately. An elevator control apparatus according to one embodiment includes a gate voltage detection portion (21) for detecting the gate voltage of a semiconductor switching element (13a) during operation of the elevator, an abnormality determination unit (22) which determines whether the semiconductor switching element (13a) is abnormal or not based on the gate voltage detected by the gate voltage detection unit (21) and a protection action part (23) for implementing a protection action on the semiconductor switching element (13a) according to the determination result.

Description

technical field [0001] An embodiment of the present invention relates to an elevator control device that controls a drive device including a power conversion device such as an inverter device. Background technique [0002] Generally, in an inverter device of an elevator, a semiconductor switching element typified by an IGBT (Insulated Gate Bipolar Transistor) is used. In recent years, such semiconductor switching elements have been miniaturized and / or miniaturized, and accordingly, the feedback capacitance of the gate terminal has increased. Therefore, the gate voltage (Vge) may fluctuate to a malfunction level through the feedback capacitance due to a sudden voltage fluctuation between the collector and the emitter during switching. [0003] prior art literature [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 7-7962 [0005] Patent Document 2: Japanese Unexamined Patent Publication No. 2006-82933 Contents of the invention [0006] The technical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/30B66B5/00G01R1/36
CPCB66B1/30B66B5/0031G01R1/36
Inventor 野岛秀一
Owner TOSHIBA ELEVATOR KK