Test method of switch power high-low voltage coupling attenuation characteristics

A technology of switching power supply and attenuation characteristics, which is applied in the field of testing the high and low voltage coupling attenuation characteristics of switching power supplies. implement simple effects

Inactive Publication Date: 2018-11-16
CATARC TIANJIN AUTOMOTIVE ENG RES INST CO LTD +1
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Problems solved by technology

However, there is currently no test method for the high and low v...

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  • Test method of switch power high-low voltage coupling attenuation characteristics

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Embodiment Construction

[0020] It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be und...

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Abstract

The present invention provides a test method of switch power high-low voltage coupling attenuation characteristics. The test is performed in a shielding chamber, and a signal source generates test signals; the test signals are output to an electromagnetic clamp after attenuation matching by a power amplifier and an attenuator, the signals are injected into the high-voltage alternating current sideof the switch power source through the electromagnetic clamp, the test signals generate an amplitude of Vinput at the high-voltage alternating current side of the switch power source; the test signals with the amplitude of Vinput are coupled and penetrate the switch power source to generate attenuation, an artificial network outputs the attenuation signals, and a receiver measures the amplitude of the signals to be Voutput; and workers subtract the Voutput from the amplitude Vinput to obtain a test result of the high-low voltage coupling attenuation characteristics of the switch power source.The test method of switch power high-low voltage coupling attenuation characteristics is simple and practicable, clear in principle, is provided with a common test device, is low in cost and high inuniversality, can effectively ensure the repeatability and the consistency of the test.

Description

Technical field [0001] The invention belongs to the technical field of electromagnetic compatibility testing, and in particular relates to a method for testing high and low voltage coupling attenuation characteristics of a switching power supply. Background technique [0002] Switching power supply is a kind of power supply that uses modern power electronic technology to control the turn-on and turn-off time of the power tube to maintain a stable output voltage. It can convert 220V alternating current into 12V or 5V direct current. It has small size, low power consumption, and stable voltage. The advantages of a wide range, so it is widely used in industrial automation control, medical equipment, electrical equipment, military products, LED lighting. When the switching power supply is working normally, the turned-on power tube provides a path for energy transmission, and the energy is transmitted from the grid to the load. This path is also a path for interference transmission. ...

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Application Information

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IPC IPC(8): G01R31/42
CPCG01R31/42
Inventor 戎辉唐风敏王子龙汪春华杭州刘喆赵明丽鲍宇王东升杨国樑
Owner CATARC TIANJIN AUTOMOTIVE ENG RES INST CO LTD
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