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Power conversion device and motorized vehicle using same

A technology for power conversion devices and rotating electrical machines, which can be applied to electric vehicles, engine-driven traction, vehicle energy storage, etc., and can solve the problems of increased number of processes and time-consuming settings

Pending Publication Date: 2020-10-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, based on the same torque command value, it is necessary to set the current command value at high efficiency and the current command value at low efficiency for the current command unit, resulting in the disadvantage that the number of steps increases and the setting is expensive. time

Method used

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  • Power conversion device and motorized vehicle using same
  • Power conversion device and motorized vehicle using same
  • Power conversion device and motorized vehicle using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] figure 1 It is a schematic configuration diagram of the power conversion device 1 according to Embodiment 1, and the three-phase AC rotating electrical machine 2 and the DC power supply 3 connected to the power conversion device 1 .

[0032] The power conversion device 1 includes: a DC voltage value generating unit 4 that generates a DC voltage value of the DC power supply 3; a DC voltage value acquiring unit 5 that obtains the DC voltage value from the DC voltage value generating unit 4 Acquiring a DC voltage value, and outputting a first DC voltage value 51; a DC voltage value correction unit 6, the DC voltage value correction unit 6 correcting the first DC voltage value 51 to a second DC voltage value 61 based on an external efficiency index 100 ; The current command unit 7, which outputs the current command value 71 based on the torque command value 200 from the outside; the current control unit 8, which is based on the current command value 71 output from the curre...

Embodiment approach 2

[0045] In Embodiment 1, the DC voltage of DC power supply 3 is directly applied to voltage application unit 9 , but the DC voltage of DC power supply 3 may be applied to voltage application unit 9 via boost unit 11 .

[0046] Image 6 It is a schematic configuration diagram of a power conversion device 1a, a three-phase AC rotating electrical machine 2, and a DC power supply 3 according to the second embodiment. The power conversion device 1a includes: a DC voltage value generating unit 4 that generates a DC voltage value of the DC power supply 3; a DC voltage value acquiring unit 5 that acquires and outputs a first DC voltage Value; DC voltage value correction unit 6, the DC voltage value correction unit 6 corrects the first DC voltage value 51 to the second DC voltage value 61 based on the efficiency index 100; current command unit 7, the current command unit 7 is based on the torque command value 200 to output a current command value 71; a current control unit 8, which out...

Embodiment approach 3

[0051] Figure 7 is a schematic configuration diagram of the electrified vehicle 12 . The electrified vehicle 12 is composed of drive wheels 13 , the power conversion device 1 described in Embodiment 1 or the power conversion device 1 a described in Embodiment 2, a three-phase AC rotating electrical machine 2 , and a DC power supply 3 .

[0052] in such as Figure 7 In the electrified vehicle 12 configured in this way, the efficiency of the power conversion device 1 and the three-phase AC rotating electrical machine 2, or the power conversion device 1a and the three-phase AC rotating electrical machine 2 is reduced, and losses are increased. Therefore, according to Figure 7 structure, when the regenerative energy of the three-phase AC rotating electrical machine 2 needs to be consumed, the losses of the three-phase AC rotating electrical machine and the power conversion device are increased to prevent the rotation speed of the three-phase AC rotating electrical machine 2 fr...

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PUM

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Abstract

There has been a drawback in that current command values need to be set for a current command unit of a power conversion device in accordance with efficiency, and thus the number of operation steps increases. In the power conversion device connected between a three-phase AC rotating machine and a DC power supply and configured to convert DC power into AC power, a DC voltage value, of the DC powersupply, that is to be inputted to a current command unit of the power conversion device is corrected on the basis of an efficiency index, and a current command value to be outputted by the current command unit is changed on the basis of the corrected DC voltage value and a torque command value, whereby the efficiencies of the power conversion device and the three-phase AC rotating machine are controlled.

Description

technical field [0001] The present application relates to a power conversion device and an electrified vehicle using the power conversion device. Background technique [0002] Electric vehicles such as electric vehicles and hybrid vehicles using a three-phase AC rotating electric machine (hereinafter referred to as an AC motor) as a driving force source are known. In this electrified vehicle, the AC motor is powered to generate driving torque during running, and regenerative operation is performed to generate regenerative braking torque during braking. [0003] Here, the driving system of the electrified vehicle is composed of a DC power supply, a power conversion device, and an AC motor. The above-mentioned DC power supply is composed of a rechargeable battery such as a lithium-ion battery. The conversion device is connected. [0004] The power conversion device is composed of capacitors, a plurality of semiconductor switches, and a control unit that controls the semicond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/00
CPCH02P23/0004B60K1/00B60K2001/001B60K1/04B60Y2400/61H02P27/06Y02T10/70B60L15/025B60L2210/40B60L50/51B60L2240/423Y02T10/64Y02T10/72B60L50/13H02P21/20H02P29/02B60K7/0007B60L50/15H02M7/00H02M1/00H02J7/00
Inventor 市川贵文家泽雅宏和田典之中野晃太郎
Owner MITSUBISHI ELECTRIC CORP