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Power Conversion Circuit System

A technology of power conversion circuit and conversion circuit, which is applied in the direction of high-efficiency power electronic conversion, control/regulation system, output power conversion device, etc., and can solve the problems of transformer loss increase and so on

Active Publication Date: 2018-11-02
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in a multi-port circuit, the core loss of the transformer becomes the main loss when the load is light, and suppressing this loss requires further fuel efficiency improvement of hybrid vehicles
Reducing the maximum magnetic flux density is effective in suppressing the core loss of the transformer, but only modulating the time ratio (duty ratio) will generate a circulating current, resulting in an increase in loss outside the transformer

Method used

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Embodiment Construction

[0030] Embodiments of the present invention will be described below with reference to the drawings.

[0031] figure 1 It is a circuit configuration diagram of the power conversion circuit system in this embodiment. The power conversion circuit system is composed of a control circuit 10 and a power conversion circuit 12 . The power conversion circuit 12 is a three-port multi-port circuit capable of bidirectional power transmission between three DC power sources using magnetically coupled reactors.

[0032] The multi-port circuit includes port A and port C in the primary conversion circuit, and port B in the secondary conversion circuit.

[0033] Between the positive bus bar of the primary side conversion circuit and the negative bus bar of the primary side conversion circuit, switching transistors S connected in series with each other are arranged. 1 and S 2 constituted by the left arm, and the switching transistors S connected in series with each other by 3 and S 4 These...

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Abstract

The invention relates to a power conversion circuit system, especially to reduce the iron core loss of a transformer under light load, so as to improve the conversion efficiency under light load. Provided with: a power conversion circuit composed of a primary side conversion circuit having left and right arms and a secondary side conversion circuit having left and right arms; and a control circuit controlling the primary side conversion circuit and the secondary side conversion circuit switch of the switching transistor. The control circuit changes and controls the time ratio of the power transmission side of the primary side conversion circuit and the secondary side conversion circuit, and changes and controls the left arm and The phase difference between the respective phases of the right arm.

Description

technical field [0001] The present invention relates to a power conversion circuit system, in particular to a power conversion circuit system with a plurality of input and output ports. Background technique [0002] With the development and popularization of electric vehicles such as hybrid vehicles, electric vehicles, and fuel cell vehicles, the power supply circuits in vehicles tend to become more complex and larger. For example, in a hybrid car, there are a running battery, a system battery, an external power supply circuit for plugging in, a DC / DC converter for supplying DC power from the running battery to a running motor, and a DC / AC converters that convert DC power from batteries into AC power, DC / DC converters that supply DC power from running batteries to electric power steering (EPS), supply DC power from running batteries The DC / DC converter to the auxiliary machine, etc., make the configuration very complicated. [0003] In view of this, development of a multi-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33561H02M3/33584H02M1/0048H02M3/158H02M3/33576Y02B70/10H02M1/0032H02M3/33546
Inventor 高木健一井上俊太郎杉山隆英长下贤一郎新见嘉崇冈村贤树
Owner TOYOTA JIDOSHA KK