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New energy vehicle three-phase inverter test system

A technology of three-phase inverters and new energy vehicles, which is applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of output reactive power, low flexibility, limited power factor, etc., and achieve easy operation and good flexibility , low-cost effect

Active Publication Date: 2020-04-07
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

RL_Load test platform architecture such as figure 2 As shown, under the premise that certain test requirements can be met, this scheme has huge advantages in cost and operability compared with the drag bench. However, because the load of this design scheme is inductive, the output is almost all reactive power, so it is limited. Based on the preset power factor, the flexibility is low and cannot reflect the real automotive application conditions

Method used

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  • New energy vehicle three-phase inverter test system
  • New energy vehicle three-phase inverter test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] New energy vehicle three-phase inverter test system, such as image 3 As shown, including the high-voltage battery, the three-phase inverter A to be tested, and the three-phase inverter B for power generation;

[0038] The DC terminals of the three-phase inverter A to be tested and the three-phase inverter B for power generation are respectively connected to the high-voltage battery through the DC bus;

[0039] The a, b, and c phases of the AC terminals of the three-phase inverter A to be tested and the three-phase inverter B for power generation are respectively connected through inductance;

[0040] The three-phase inverter A to be tested is used as the device under test and works in the electric mode;

[0041] The power generation three-phase inverter B works in power generation mode.

[0042] Preferably, the inductance L between the three phases a, b, and c of the AC terminals of the three-phase inverter A to be tested and the three-phase inverter B for power gene...

Embodiment 2

[0045] Based on Embodiment 1, the new energy vehicle three-phase inverter test system also includes a drive controller;

[0046] The three-phase inverter A to be tested and the three-phase inverter B for power generation are both in open-loop mode (that is, they do not perform current closed-loop control);

[0047] The drive controller controls the amplitude, angle and frequency of the a, b, and c three-phase synthetic voltage vector Vb of the AC terminal of the three-phase inverter B of the power generation to be constant;

[0048] The drive controller, and according to the target output current Is of the three-phase inverter to be tested, the target output power Pa, the angular frequency ω, and the three-phase composite voltage a, b, and c of the AC terminal of the three-phase inverter for power generation Vector Vb, calculate the a, b, c three-phase composite voltage vector Va of the AC terminal of the three-phase inverter to be tested, according to the q-axis component Usq...

Embodiment 3

[0056] Based on the implementation of the new energy vehicle three-phase inverter test system, such as Figure 5 As shown, the drive controller performs Park inverse transformation on the q-axis component UsqDes and the d-axis component UsdDes of the a, b, and c three-phase composite voltage vector Va of the AC terminal of the three-phase inverter A to be tested, and then performs SVPWM (Space Vector Pulse Width Modulation, space vector pulse width modulation), to obtain the switch control signals of the six power switches of the three-phase inverter A to be tested.

[0057] Park transformation is to transform the electromagnetic quantities (current, voltage, flux linkage, etc.) of the abc phase variable system into the dqo axis variable system with the vertical axis d, horizontal axis q and stationary axis 0 as coordinate axes.

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Abstract

The invention discloses a new energy vehicle three-phase inverter test system which comprises a high-voltage battery, a to-be-tested three-phase inverter, and a power generation three-phase inverter. The DC ends of the to-be-tested three-phase inverter and the power generation three-phase inverter are connected with the high-voltage battery through DC buses. The phases A, B and C of the AC ends of the to-be-tested three-phase inverter and the power generation three-phase inverter are respectively connected through inductors. The to-be-tested three-phase inverter as a tested device works in an electric mode. The power generation three-phase inverter works in a power generation mode. The new energy vehicle three-phase inverter test system of the invention needs no motor, and has a controllable power factor. The system not only can truly simulate the power condition of a real vehicle and accurately test a power inverter, but also has the advantages of low cost, high flexibility and simple operation.

Description

technical field [0001] The invention relates to new energy vehicle testing technology, in particular to a new energy vehicle three-phase inverter testing system. Background technique [0002] In pure electric or hybrid vehicles, the inverter, as one of the core components of the electric powertrain, must undergo on-load tests including electrical tests, thermal tests, efficiency tests, and output capability tests before leaving the factory. At present, the usual practice for this type of experiment is to implement the motor-to-drag platform, that is, the inverters of the two driving motors are connected to the DC bus in parallel, the two driving motors are directly connected through the transmission shaft, and one is used for torque control and used as an electric motor. One mode is to output power, and the other is used for speed control, which is used as a power generation mode to pump energy back to the DC side. Such as figure 1 As shown, this traditional motor-to-drag ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 代朋冯瑛孙可陈磊敏
Owner UNITED AUTOMOTIVE ELECTRONICS SYST