Multi-winding flyback inverter and its control method
A flyback and inverter technology, which is applied in the field of multi-winding flyback inverter and its control, can solve the problems of increasing switching frequency, reducing circuit efficiency, and increasing circuit loss, and achieves the reduction of switching frequency, Reduce circuit loss and facilitate heat dissipation
Active Publication Date: 2022-03-11
HOYMILES POWER ELECTRONICS INC
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Problems solved by technology
[0004] The purpose of this application is to provide a multi-winding flyback inverter and its control method to solve the problem that the switching frequency increases as the output current decreases when the flyback inverter in the prior art adopts quasi-resonant control. The loss also becomes larger, leading to the problem of lower circuit efficiency
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[0039] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention, those of ordinary skill in the art make structural, method, or functional changes based on these embodiments All are included in the scope of protection of the present invention.
[0040] Such as figure 1 Shown is a schematic circuit structure diagram of a flyback inverter in the prior art. The existing flyback inverter includes a flyback circuit and an inverter circuit. The flyback circuit includes a primary side module and a secondary side module. The primary side module includes a primary side winding and a primary side switch tube. The first terminal is used as the positive input terminal of the flyback circuit, the same terminal of the primary winding is connected to the drain of the primary switching tube, and the source of the primary switching tube is used as the negati...
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The present application discloses a multi-winding flyback inverter and its control method, including: an input terminal receiving a DC input voltage; a flyback circuit connected to the input terminal for converting the DC input voltage into a half-sine wave form The flyback circuit includes multiple primary side modules connected in parallel at the input terminal and secondary side modules coupled with multiple primary side modules; the inverter circuit, connected with the flyback circuit, reverses the polarity of the current in the form of a sine half wave , to generate an output current in the form of AC; the control circuit is connected to the flyback circuit and the inverter circuit respectively, and is used to control the work of the flyback circuit and the inverter circuit. The control circuit selects multiple primary sides according to the output current or the output current reference value One of the modules is transformed with the secondary side module. It solves the problem that in the prior art, when the flyback inverter adopts quasi-resonance control, the switching frequency increases with the decrease of the output current, and the circuit loss also increases accordingly, resulting in the decrease of the circuit efficiency.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a multi-winding flyback inverter and a control method thereof. Background technique [0002] Due to global warming, environmental pollution is becoming more and more serious, and the development and utilization of clean, pollution-free and renewable new energy sources such as solar energy and wind energy have attracted more and more attention. DC-DC power conversion device is one of the most basic forms of power conversion. Due to its simple structure, small number of components, electrical isolation of input and output, and easy realization of multiple outputs, the flyback converter is widely used in DC-DC conversion in the small power range, and is also the DC-DC converter of photovoltaic inverters. One of the commonly used topologies of the stage, the traditional flyback inverter such as figure 1 As shown, it includes a flyback circuit and an inverter c...
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IPC IPC(8): H02M3/335H02M7/5387H02M7/48
CPCH02M3/33569H02M7/53871H02M7/48
Inventor 荣强李威辰禹红斌袁绍君诸亮杨波
Owner HOYMILES POWER ELECTRONICS INC