Controller for AC electric train

A technology of control device and AC voltage, applied in the direction of AC motor control, electric device, traction of AC induction motor, etc., can solve the problems of power failure detection delay of feeder circuit, device failure, etc., and achieve the effect of rapid and reliable power failure detection

Inactive Publication Date: 2010-03-31
MITSUBISHI ELECTRIC CORP
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  • Abstract
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Problems solved by technology

[0006] On the other hand, in this conventional method, it is also possible to change the power failure detection setting value and set it to a value that reduces the probability of false detection. However, in this

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  • Controller for AC electric train
  • Controller for AC electric train

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Embodiment Construction

[0041] Next, a control device for an AC electric vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to embodiment shown below.

[0042] (Structure of AC tram)

[0043] figure 1 It is a figure which shows the structure of the drive system and control system of the AC electric vehicle concerning the ideal embodiment of this invention. In this figure, the driving system of an AC electric car includes: a main transformer 3 that takes AC power as an input, a PWM rectifier 4 that takes the AC output of the main transformer 3 as an input, and an inverter that takes the DC output of the PWM rectifier 4 as an input. An inverter 10 and one or more electric motors 13 driven by the AC output of the inverter 10 . In addition, it is preferable to use an induction motor or a synchronous motor as the motor 13 .

[0044] On the other hand, the control system of an AC el...

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Abstract

In a controller for an AC electric train which can perform powering and regenerating operations and can detect any power failure on AC overhead wires for supplying the AC power, detection of any powerfailure on AC overhead wires is carried out quickly without fail. A power failure detector (14) provided on an electric train controller (8) includes a specific frequency signal arithmetic operationsection (16) which extracts a current component corresponding to a specific frequency setting value (26) from a main transformer output current detection signal (7) to output the extracted signal as aspecific frequency current signal (18), a subtracter (19) which subtracts the main transformer output current detection signal (7) from the specific frequency current signal (18) to output the subtraction result as a current deviation (20), and a power failure detection section (23) which compares the current deviation (20) with a specified power failure detection setting value (22) and outputs apower failure detection signal (15) when the current deviation (20) is greater than the power failure detection setting value (22).

Description

technical field [0001] The present invention relates to a control device for an AC electric vehicle driven by an AC motor, and more particularly to a control device for an AC electric vehicle having a power failure detection function for overhead wires (hereinafter referred to as "AC overhead wires") that supply alternating current. Background technique [0002] In the control device of an AC electric vehicle according to the prior art, first, for a current signal of a certain frequency component applied from a substation to an AC overhead line, the detector on the input side of the main transformer is used to detect the presence or absence of overlap in the substation. specific frequency components. Then, a current signal of a certain frequency component detected by the detector cannot be detected due to the opening of the circuit breaker of the power feeding system, etc., and power outage detection is performed (for example, refer to Patent Document 1). [0003] Patent Do...

Claims

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Application Information

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IPC IPC(8): B60L9/28H02P27/06
CPCB60L9/28B60L2200/26B60L3/00B60L9/005H02P27/06
Inventor 横堤良
Owner MITSUBISHI ELECTRIC CORP
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