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Testing device of intelligent power module

A technology of intelligent power modules and testing devices, which is applied in the direction of electronic circuit testing, etc., can solve the problems of long time consumption and high cost of overcurrent protection voltage, and achieve the effect of saving cost and time

Active Publication Date: 2015-06-10
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] For the time-consuming and high-cost problems of testing the IPM module overcurrent protection voltage in the related art, no effective solution has been proposed at present. Therefore, the main purpose of the present invention is to provide a test device for intelligent power modules to solve above question

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0023] figure 2 is a schematic structural diagram of a testing device for an intelligent power module according to an embodiment of the present invention. Such as figure 2 As shown, the device may include: a test circuit 1, connected to the intelligent power module 2, for sending a scanning voltage gradually rising from zero to the intelligent power module, and receiving a power-off signal fed back by the intelligent power module; a voltage reading device 3 , connected to the test circuit 1, for reading the voltage value of the scanning voltage when receiving the power-off signal.

[0024] With the present invention, the scanning voltage gradually rising from 0 is sent to the intelligent p...

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Abstract

The invention discloses a testing device of an intelligent power module. The testing device comprises a testing circuit and a voltage readout device, wherein the testing circuit is connected with the intelligent power module and is used for sending scanning voltage gradually increasing from zero to the intelligent power module and receiving power-off signals fed back by the intelligent power module, and the voltage readout device is connected with the testing circuit and is used for reading voltage values of the scanned voltage when the power-off signals are received. The testing device solves the problems of long consumed time and high cost during testing of overcurrent protecting voltages of the IPM (intelligent power module), and is capable of saving cost and time due to the fact that original-factory high-grade high-precision advanced professional equipment for testing the intelligent power module is not required.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a testing device for an intelligent power module. Background technique [0002] At present, the intelligent power modules (IPM modules) used in inverter air conditioners all have over-current protection functions. The principle is as follows: figure 1 As shown, the working current of the intelligent power module (that is, the IPM module) is converted into a voltage signal through a high-power sampling resistor, and then the voltage signal is sent to the overcurrent protection port for detection. If the voltage of the port reaches a predetermined value, the IPM module will It will think that the working current is too large, and it is necessary to reduce the working current to ensure that the IPM module will not be burned. At this time, the Fo signal port will feed back a signal to the MCU chip. The voltage at the overcurrent protection port when the Fo signal port feeds back t...

Claims

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Application Information

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IPC IPC(8): G01R31/28
Inventor 冯勇雄方祥建欧毓迎
Owner GREE ELECTRIC APPLIANCES INC
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