Single bridge arm shutdown test platform and method in three-level h-bridge inverter
A test method and test platform technology, applied in the field of power electronics, can solve problems such as difficulty in testing the rated capacity and performance of power modules
Inactive Publication Date: 2017-10-03
上海整流器厂有限公司
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It is also more and more difficult to test the rated capacity and performance of power modules
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[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] Such as figure 1 , figure 2 The test platform shown includes three-level H-bridge power module M1, voltage regulator TR, rectifier bridge Z1, reactor L, current Hall LEM, test control board B1, and man-machine interface H1. The DC bus of the three-level H-bridge power module M1 is directly connected to the DC output of the rectifier bridge; the AC outgoing line of the bridge arm to be tested in the three-level module is connected to the reactor L, and the other end of the reactor passes through the current H The Hall LEM is connected to the midpoint of the DC capacitors C1 and C2 in the three-level H-bridge power module M1; the measurement signal of the current Hall LEM is introduced into the test control board B1 of the test control platform; The communication interface of the flat H-bridge power module M1 is connec...
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The invention discloses a single bridge arm shutdown test platform in a three-level H-bridge inverter and a method thereof, which include any bridge arm to be tested in a three-level H-bridge power module, a voltage regulator, a rectifier Bridge, reactor, current Hall, test control board and man-machine interface connected to the test control board; the output terminal of the voltage regulator is connected to the rectifier bridge; the DC bus of the three-level H-bridge power module and the DC output of the rectifier bridge The AC outgoing line of the bridge arm to be tested in the three-level H-bridge power module is connected to one end of the reactor, and the other end of the reactor passes through the current Hall and connects to the center of the DC capacitor in the three-level H-bridge power module. The current Hall is also connected to the test control board; the test control board is connected to the three-level H-bridge power module through an optical fiber. It can avoid the situation that when the positive sequence or negative sequence current is triggered separately, the other half of the capacitor will be charged, resulting in the unbalance of the upper and lower half of the capacitor and the situation that the accurate measurement data cannot be obtained.
Description
technical field [0001] The invention relates to the field of power electronics, and more specifically relates to a single bridge arm shutdown test platform and method in a three-level H-bridge inverter. Background technique [0002] With the advancement of technology, power electronic devices composed of three-level H-bridge topology are widely used in power transmission and distribution networks, and the voltage level and capacity of power modules that constitute these devices are also increasing. It is also more and more difficult to test the rated capacity and performance of the power module. In order to test the performance of the three-level H-bridge inverter conveniently and reduce the test cost, there is an urgent need in the market for a turn-off test platform and method for a single bridge arm in the three-level H-bridge inverter. Contents of the invention [0003] Aiming at the defects existing in the prior art, the object of the present invention is to provide ...
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IPC IPC(8): G01R31/42
Inventor 姜科张秀娟赵香花
Owner 上海整流器厂有限公司