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Power conversion device and power conversion method

A technology of power conversion device and power value, which is applied in the direction of output power conversion device, electrical components, and adjustment of electric variables, etc., and can solve problems such as damage to the upper arm and lower arm

Inactive Publication Date: 2015-07-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, if the dead time is too short, the upper and lower arms may be damaged due to through current

Method used

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  • Power conversion device and power conversion method
  • Power conversion device and power conversion method
  • Power conversion device and power conversion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016]

[0017] figure 1 is a block diagram showing a configuration example of the power supply device 101 as an embodiment of the power conversion device. The power supply device 101 is a power supply system including, for example, the power supply circuit 10 , the controller 50 and the sensor section 70 . The power supply device 101 is a system that is installed in, for example, a vehicle such as an automobile and supplies electric power to each vehicle-mounted load. Specific examples of such vehicles may include hybrid vehicles, plug-in hybrid vehicles, and electric vehicles. The power supply device 101 may be installed in a vehicle that uses an engine as a main drive source.

[0018] The power supply device 101 has, for example, a first input / output port 60a connected to a primary high voltage system load 61a and a second input / output port 60c connected to a primary low voltage system load 61c and a primary low voltage system power supply 62c as primary ports. The pri...

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PUM

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Abstract

A power conversion device includes primary and secondary full bridge circuits, and a control portion configured to adjust a phase difference between switching in the primary full bridge circuit and switching in the secondary full bridge circuit, so as to control power transmitted between the full bridge circuits, in which each of the full bridge circuits includes an upper arm and a lower arm connected in series to each other, the control portion shortens a dead time when neither of the upper and lower arms are turned on in a transmission state, and in a case where a gate driving state is detected in which both of the upper and lower arms are turned on, the control portion sets an adjustment value of the dead time in the transmission state to a dead time value greater than a dead time detection value when the gate driving state is detected.

Description

technical field [0001] The present invention relates to techniques for converting power between a primary full bridge circuit and a secondary full bridge circuit. Background technique [0002] There is a power conversion device that converts power between a primary full bridge circuit and a secondary full bridge circuit (for example, refer to Japanese Patent Application Publication No. 2011-193713 (JP 2011-1937130)). Each of the primary full bridge circuit and the secondary full bridge circuit includes an upper arm and a lower arm connected in series with the upper arm. [0003] However, if the characteristics (for example, electrical characteristics such as current characteristics) of each arm vary, the time period (dead time) during which neither the upper arm nor the lower arm is conductive fluctuates. If the dead time is too long, the loss will increase, so the power conversion efficiency will decrease. Conversely, if the dead time is too short, the upper and lower arm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33546H02M1/38H02M3/158H02M3/33584H02M3/33561H02M1/0095
Inventor 佐佐木一行
Owner TOYOTA JIDOSHA KK