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Semiconductor unit and power conversion device

A semiconductor and frame technology, which is applied in the direction of output power conversion devices, electrical components, and structural parts of conversion equipment, can solve the problems of damaging smoothing capacitors, increasing weight, and increasing costs, and achieve shortened maintenance time and low cost. , The effect of simplification of maintenance

Inactive Publication Date: 2014-06-11
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, in the prior art, since the initial charging needs to install the contacts and the common power bus as the circuit for the current limiting element, the weight and the installation area increase.
In addition, an increase in cost due to an increase in mechanical structural parts is expected
[0005] Furthermore, time is wasted on maintenance and there is even a possibility of destroying the smoothing capacitor if the current limiting element is not functioning effectively

Method used

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  • Semiconductor unit and power conversion device
  • Semiconductor unit and power conversion device
  • Semiconductor unit and power conversion device

Examples

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Embodiment Construction

[0018] Hereinafter, an example of one embodiment of the present invention will be described with reference to the drawings. For ease of understanding, first, the Figure 1~3 Next, the basic point of view will be clarified while referring to the reference examples.

[0019] Disclosed as a reference example as a semiconductor power conversion device composed of a semiconductor unit housed in a storage tray and the storage tray Figure 4 structure shown. Should Figure 4 In the shown configuration, a plurality of inverter units are stored in a storage tray, and the inverter unit in each stored inverter unit performs power conversion for converting DC power to AC power and supplies the power to necessary equipment. in the Figure 4 The configuration of the example is such that the inverter unit is directly inserted and removed from the storage tray while the power is being supplied. In order to perform insertion and removal while the power is being supplied, an initial chargi...

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Abstract

PURPOSE: A semiconductor unit and a power conversion device thereof are provided to automate the operation from an initial charge state to a conductive state by installing a switch for initially charging, which is opened and closed with the voltage of a smoothing condenser within an inverter unit. CONSTITUTION: A contactor and a second contactor are connected to a common power supply line(101a,101b) of an enclosing part(100). A smoothing condenser(203) smoothes the power source. An inverter unit(202) changes the power source smoothed in the smoothing condenser. An opening and closing part is connected to a current limiting element in parallel. A voltage detecting part detects the charging voltage of the smoothing condenser. A controller operates the opening and closing part with the voltage detected from the voltage detecting part.

Description

technical field [0001] The present invention relates to a semiconductor unit stored in a storage tray and a power conversion device composed of the semiconductor unit and the storage tray, in particular to a power conversion device suitable for carrying out live insertion of the semiconductor unit from the storage tray when the power is supplied from the storage tray. Unplugged semiconductor unit and power conversion device. Background technique [0002] Generally, as a semiconductor power conversion device composed of a semiconductor unit housed in a storage tray and the storage tray, the inverter unit in the housed unit performs power conversion for converting DC power into AC power, and supplies the necessary device of. Power for conversion is supplied by connecting the common power bus and contacts. In addition, in this kind of device, the power from the AC power supply needs to be smoothed for power conversion, so a smoothing capacitor is provided. [0003] On the ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/42
CPCH02M1/14H02M7/003
Inventor 松本洋平执行正谦金泽胜昭
Owner HITACHI LTD