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Open-phase detection method and device, controller and three-phase power supply system

A phase-lack detection and phase-lack technology, which is applied in the direction of circuit devices, emergency protection circuit devices, multi-phase network asymmetry measurement, etc., can solve the problems of increased cost and low compatibility, and achieve high compatibility, low cost, and improved The effect of power supply reliability

Pending Publication Date: 2022-04-15
ZHANGZHOU KEHUA ELECTRIC TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a phase loss detection method, device, controller and three-phase power supply system to solve the problem that the design of a detection circuit to detect whether a phase is lacking will not only increase the cost, but also have low compatibility

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  • Open-phase detection method and device, controller and three-phase power supply system
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  • Open-phase detection method and device, controller and three-phase power supply system

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Embodiment Construction

[0053] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0054] In order to make the purpose, technical solution and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0055] see figure 1 , which shows a three-phase power supply circuit without a neutral line provided by an embodiment of the present invention. like figure 1 As shown, the three-phase power supply c...

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Abstract

The invention provides an open-phase detection method and device, a controller and a three-phase power supply system, the open-phase detection method and device are applied to a three-phase power supply circuit without a null line, second ends of output capacitors of all phases of the three-phase power supply circuit are connected to form a common end, and the method comprises the following steps: obtaining a three-phase line voltage of the three-phase power supply circuit; inputting the three-phase line voltage into a predetermined line-phase conversion formula to obtain a three-phase phase voltage of the three-phase power supply circuit; and judging whether the three-phase power supply circuit is open-phase according to the three-phase phase voltage. The power supply reliability can be improved.

Description

technical field [0001] The invention relates to the technical field of three-phase detection, in particular to a phase-loss detection method, device, controller and three-phase power supply system. Background technique [0002] With the continuous development of power supply technology, the three-phase power supply circuit without neutral line is more and more widely used, and its phase loss detection has also received more and more attention. Because it lacks a neutral line, when there is a phase loss, the three phases will be coupled with each other, which will affect the accuracy of the detected voltage. For the lack of phase detection without neutral line, most of the prior art detects whether there is a lack of phase by introducing a hardware detection circuit. However, designing a detection circuit to detect whether there is a lack of phase will not only increase the cost, but also have low compatibility. Contents of the invention [0003] The invention provides a p...

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Application Information

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IPC IPC(8): G01R29/16H02H3/13H02H1/00
Inventor 邱雄钱贺平田华松詹世淋
Owner ZHANGZHOU KEHUA ELECTRIC TECH CO LTD