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Three-phase inverter voltage phase sequence detection circuit, device and method

A three-phase inverter, phase sequence detection technology, applied in the aviation field, can solve the problems of high price of integrated circuits, lack of isolation of chips, and reduced safety and reliability of phase sequence detection circuits.

Active Publication Date: 2021-12-28
SHAANXI AVIATION ELECTRICAL
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Problems solved by technology

The traditional three-phase voltage phase sequence detection circuit has disadvantages such as complex circuit principle, too many components, and low reliability.
The price of existing integrated circuits for phase sequence signal detection is high, and some chips lack isolation
These shortcomings increase the difficulty and cost of the three-phase voltage phase sequence detection circuit, and at the same time reduce the safety and reliability of the phase sequence detection circuit

Method used

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  • Three-phase inverter voltage phase sequence detection circuit, device and method

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Embodiment Construction

[0016] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the related application, not to limit the application. In addition, it should be noted that, for ease of description, only parts relevant to the present application are shown in the drawings.

[0017] 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 application will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] It should be noted that in the description of this application, the terms "first", "second", "third", "fourth", "fifth", "sixth", and "seventh" are only used for describe purpose and should not be read as indicating or implying relative importance.

[0019] In the first a...

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Abstract

The application provides a voltage phase sequence detection circuit for a three-phase inverter, including: a phase detection circuit for collecting phase signals of three-phase voltages, and outputting the collected phase signals as voltage square wave signals; an optocoupler switch The circuit, connected with the phase detection circuit, is used to collect the phase signal of the output voltage for subsequent processing when the optocoupler switch circuit is forward-conducting; the phase signal conversion circuit, connected with the optocoupler switch circuit, is used for three-phase voltage The phase signal is compared and processed; the voltage comparison circuit is connected with the phase signal conversion circuit, used to judge whether the three-phase output voltage has a reverse sequence, and gives a protection signal. The present application also provides a three-phase inverter voltage phase sequence detection device and method.

Description

technical field [0001] This application relates to the field of aviation technology, and specifically provides a three-phase inverter voltage phase sequence detection circuit, device and method. Background technique [0002] In the field of aviation power system, there are a large number of applications that need to detect the phase sequence of three-phase voltage. The traditional three-phase voltage phase sequence detection circuit has disadvantages such as complex circuit principle, too many components, and low reliability. The price of existing integrated circuits for phase sequence signal detection is high, and some chips lack isolation. These disadvantages increase the difficulty and cost of the three-phase voltage phase sequence detection circuit, and at the same time reduce the safety and reliability of the phase sequence detection circuit. Contents of the invention [0003] In order to solve at least one of the above technical problems, the present application pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/18
CPCG01R29/18
Inventor 黄伟孙建勤孙彦鹏
Owner SHAANXI AVIATION ELECTRICAL
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