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Electric car control apparatus

A technology for control devices and electric vehicles, which is applied to electric devices, electric vehicles, deceleration devices of AC motors, etc., can solve the problem of inability to detect partial grounding of braking resistors

Inactive Publication Date: 2007-08-29
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tram control described above cannot detect a partial grounding of the braking resistor

Method used

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Examples

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Effect test

no. 1 Embodiment approach

[0019] FIG. 1 is a configuration diagram of an electric train control device according to a first embodiment of the present invention. Hereinafter, the same symbol is assigned to the same part and its detailed description is omitted, and the different parts are mainly described. Repeated descriptions will also be omitted for subsequent embodiments.

[0020] The DC power supply 11 uses a rectifier to rectify, for example, electric power generated by a DC tram line (catenary) or an on-board engine generator, and outputs DC power. The DC power supply 11 is connected to a DC terminal of an inverter 14 via a first switch 12 . Filter capacitor 13 is connected between DC terminals of inverter 14 on the side closer to inverter 14 than first switch 12 . The inverter 14 is connected to an AC motor 15 as a load on the output side. Usually, an induction motor is used as the AC motor 15 . In addition, variable voltage variable frequency (VVVF) operation control is performed on the inve...

no. 2 Embodiment approach

[0029] Fig. 2 is a block diagram of an electric train control device according to a second embodiment of the present invention. In the second embodiment, in the first embodiment shown in FIG. 1 , instead of the braking resistance calculation unit 19 and the braking resistance partial grounding detector 21 , a braking resistance calculation unit 19A and a braking resistance partial grounding detector 21A are provided. , a coordinate conversion unit 24 , a torque calculation unit 25 and a power calculation unit 26 . In addition, instead of the current detector 18, a current detector 22, a current detector 23, and a speed sensor 27 are provided.

[0030] Brake resistor calculation unit 19A calculates resistance value BReS2 of brake resistor 17 based on brake power PB and voltage value Vdc of brake resistor 17 .

[0031] The current detector 22 detects the u-phase current value Iu of the AC motor 15 . The current detector 23 detects a w-phase current value Iw of the AC motor 15 ...

no. 3 Embodiment approach

[0044] Fig. 3 is a block diagram of an electric train control device according to a third embodiment of the present invention. In the third embodiment, in the second embodiment shown in FIG. 2 , instead of the braking resistance calculation unit 19A and the braking resistance partial grounding detector 21A, a braking resistance calculation unit 19B and a braking resistance partial grounding detector 21B are provided. . In addition, instead of the voltage detector 20, a current detector 18 is provided.

[0045] The braking resistance calculation unit 19B calculates the resistance value BReS3 of the braking resistor 17 based on the braking power PB and the current value IBRe.

[0046] The current value IBRe detected by the current detector 18 is input to the braking resistance calculation unit 19B. The braking power PB calculated by the power calculating unit 26 is input to the braking resistor calculating unit 19B. The braking resistance calculation unit 19B receives the inp...

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PUM

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Abstract

An electric rolling stock control apparatus includes, an alternating-current motor (15) for making an electric rolling stock run, and for carrying out brake control of the electric rolling stock, a dynamic braking resistor (17) for consuming electric power generated by the brake control, electric current detector (18) for detecting a value of current flowing in the dynamic braking resistor (17), voltage detector (20) for detecting a value of voltage between both terminals of the dynamic braking resistor (17), dynamic braking resistance calculating unit (19) for calculating a value of resistance of the dynamic braking resistor (17) on the basis of the value of current and the value of voltage, and a dynamic braking resistance partial ground fault detector (21) for detecting a partial ground fault in the dynamic braking resistor (17) when the value of resistance is less than a predetermined value.

Description

[0001] Cross References to Related Applications [0002] This application is based upon and claims priority from prior Japanese Patent Application No. 2006-033627 filed on February 10, 2006, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to an electric vehicle control device provided with a mechanism for braking the electric vehicle by performing power generation control on an AC motor. Background technique [0004] Generally, the electric car control device brakes the electric car by controlling the power generation of the AC motor. Specifically, the AC motor subjected to power generation control converts rotational energy into AC power. The inverter converts the alternating current converted by the alternating current motor into direct current. The direct current converted by the converter is dissipated by the braking resistor as Joule heat. [0005] In such an electric vehicle control device, wh...

Claims

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Application Information

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IPC IPC(8): B60L7/02
CPCB60L3/0023B60L3/0069B60L7/02H02P3/22B60L7/003Y02T10/642B60L2200/26Y02T10/64
Inventor 林敏宮崎玲
Owner KK TOSHIBA
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