Driving circuit of electric power conversion unit, driving method, electric power conversion unit, and electric power conversion device

A power conversion device and power conversion technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of large-capacity and cost-effective power conversion devices, and achieve the effect of reducing accuracy or reliability

Active Publication Date: 2018-12-25
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are limitations to increase the capacity and cost of power conversion devices by connecting power conversion units in parallel

Method used

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  • Driving circuit of electric power conversion unit, driving method, electric power conversion unit, and electric power conversion device
  • Driving circuit of electric power conversion unit, driving method, electric power conversion unit, and electric power conversion device
  • Driving circuit of electric power conversion unit, driving method, electric power conversion unit, and electric power conversion device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] figure 1 A block diagram showing a drive circuit of the power conversion unit according to Embodiment 1 of the present invention. In addition, an example of a gate voltage waveform and an example of a main current waveform are described together.

[0035] The current conversion device is composed of a power conversion unit 111 and a power conversion unit 112 . The power conversion unit 111 and the power conversion unit 112 are connected in parallel to each other, and are controlled by the common control unit 6 . In addition, the number of power conversion units connected in parallel is not limited to two, and may be multiple according to the power capacity of the power conversion device.

[0036] The power conversion unit 111 is composed of a power semiconductor switching element 301 and a drive circuit 501 . The power conversion unit 112 is composed of a power semiconductor switching element 302 and a drive circuit 502 . The semiconductor switching element 301 and ...

Embodiment 2

[0072] Figure 5 A block diagram showing a driving circuit of a power conversion unit according to Embodiment 2 of the present invention. Hereinafter, the points different from the first embodiment will be mainly described.

[0073] In Embodiment 2, the characteristic map information 31, 32 ( figure 1 ) is obtained by reference from the database 201.

[0074] like Figure 5 As shown, characteristic map information representing the relationship between the switching characteristic of each semiconductor switching element and the gate driving voltage is stored in the database 201 . The power conversion unit 111 and the power conversion unit 112 are associated with the characteristic mapping information in the database 201 by using identification mechanisms such as product barcodes or manufacturing numbers attached to them.

[0075] When the power conversion unit 111 and the power conversion unit 112 are connected in parallel, the computer 203 uses the reading mechanism 202 to...

Embodiment 3

[0080] Image 6 A block diagram showing a drive circuit of a power conversion unit according to Embodiment 3 of the present invention. Hereinafter, the points different from the first embodiment will be mainly described.

[0081] The power conversion unit 111 is composed of a power module 305 including upper and lower arms, a driving circuit 503 for driving the semiconductor switching element 303 of the upper arm, and a driving circuit 501 for driving the semiconductor switching element 301 of the lower arm. Furthermore, the power conversion unit 112 is composed of a power module 306 including upper and lower arms, a driving circuit 504 for driving the semiconductor switching element 304 of the upper arm, and a driving circuit 502 for driving the semiconductor switching element 302 of the lower arm.

[0082] The power conversion unit 111 and the power conversion unit 112 are connected in parallel to constitute one phase of a main circuit of a power conversion device (for exam...

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PUM

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Abstract

The invention provides a driving circuit of an electric power conversion unit which can improve precision and reliability of current unbalance reduction, a driving method, an electric power conversionunit having the driving circuit, and an electric power conversion device in parallel connection with a plurality of electric power conversion units. The driving circuit (501) which is disposed in theelectric power conversion unit (111) using a semiconductor switch element (301) and drives the semiconductor switch element, is provided with a voltage variable circuit part (55) for outputting the driving voltage for control, which is to be applied to the semiconductor switch element. In the voltage variable circuit part, when the plurality of electric power conversion units are in parallel connection, variable control is conducted on the driving voltage based on the feature mapping information (31) showing the relation between the element feature of the semiconductor switch element and thedriving circuit, so that the element feature can be a regulated value (30).

Description

【Technical field】 [0001] The present invention relates to a driving circuit and a driving method of a power conversion unit that converts power using a semiconductor switching element, a power conversion unit composed of a semiconductor switching element and a driving circuit, and a power conversion device including a plurality of power conversion units. 【Background technique】 [0002] In a power conversion device such as an inverter device, a power conversion unit is integrally formed by components such as a power semiconductor module equipped with a semiconductor switching element, a capacitor, a bus bar, and a gate drive circuit. By installing a plurality of such power conversion units, the output can be increased. capacity. By using such a power conversion unit, components can be shared and the cost of the power conversion device can be reduced. Here, by increasing the number of power conversion units connected in parallel, it is possible to increase the capacity of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088
CPCH02M1/088
Inventor 三间彬森和久松元大辅上妻央大沼直人
Owner HITACHI LTD
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