A dual-channel switching control power supply circuit and high-voltage inverter
A technology for controlling power supply and branch circuit, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of lack of phase detection, low switching reliability of dual-circuit switching control power supply circuits, etc., to improve reliability. Effect
Active Publication Date: 2017-10-13
SUZHOU INOVANCE TECH CO LTD
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a dual-way switching control power supply with electrical interlocking and phase-loss detection for the defects of the existing two-way switching control power supply circuit that the switching reliability is not high and there is no phase loss detection circuit and a high-voltage inverter using the dual-way switching control power supply circuit
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] The invention provides a two-way switching control power supply circuit, in particular a reliable and stable two-way switching control power supply circuit for a high-voltage frequency converter. see figure 1 , is a block diagram of a dual-way switching control power supply circuit according to a preferred embodiment of the present invention. Such as figure 1 As shown, the dual-way switching control power supply circuit provided by the present invention includes a power switching module 100 and a voltage conversion module 200 . The power switching module 100 is used to switch between the first input power and the second input power to provide dual power supply. The voltage conversion module 200 is used to convert the input power into a re...
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The invention relates to a dual-circuit switching control power circuit. The dual-circuit switching control power circuit comprises a power switching module and a voltage converter module, wherein the power switching module comprises a first switching unit and a second switching unit; the first switching unit comprises a first AC contactor, a first relay and a first control circuit branch; the first control circuit branch is in series connection with a coil of the first AC contactor, a normally-open auxiliary contact of the first relay, and a normally-closed auxiliary contact of a second AC contactor; the second switching unit comprises the second AC contactor, a second relay and a second control circuit branch; the second control circuit branch is in series connection with a coil of the second AC contactor, a normally-open auxiliary contact of the second relay, and a normally-closed auxiliary contact of the first AC contactor. The dual-circuit switching control power circuit is reliable and stable, and can be used in a high-voltage inverter. According to the invention, electrical interlock is adopted in the two switching units, so that the effectiveness of the dual-circuit switching is improved, the relays are additionally arranged to realize default phase detection, and the system reliability is improved by combining the mechanical interlock.
Description
technical field [0001] The invention relates to the technical field of power circuits, and more specifically, relates to a dual-way switching control power circuit and a high-voltage frequency converter. Background technique [0002] With the rapid development of the economy, the demand for energy-saving products is also increasing, which greatly stimulates the market demand for high-voltage inverters. At the same time, more and more customers have higher and higher requirements on the operating performance and reliability of high-voltage inverters. As a prerequisite for the reliable operation of the high-voltage inverter system and the importance of the control power supply, more and more designers have paid more and more attention to it. At present, most of the high-voltage inverter control power supply schemes on the market are the following two schemes: the first scheme uses the 380V power supply provided by the user as the only power supply, and at the same time conver...
Claims
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IPC IPC(8): H02J9/06H02M7/02
Inventor 刘凯峰
Owner SUZHOU INOVANCE TECH CO LTD