Solar charging circuit and charging method thereof
A charging circuit, solar energy technology, applied in battery circuit devices, circuit devices, high-efficiency power electronic conversion, etc., can solve the problems of complex control and low conversion efficiency
Inactive Publication Date: 2017-06-13
深圳市拓革科技有限公司
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Problems solved by technology
[0004] The solar charging circuit and its charging method provided by the present invention solve the problems of low conversion efficiency and complicated control in the dual-stage converter circuit in the prior art
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[0037] 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. It should be understood that the specific embodiments described here are used to explain the present invention, not to limit the present invention. In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0038] Embodiment 1 of the present invention provides a solar charging circuit, such as Figure 6 As shown, the solar charging circuit includes a photovoltaic module 101, a two-phase interleaved buck converter 102, an MPPT controller 108, a voltage controller 107, a current controller 106, a two-phase interleaved PWM controller 105 and a full-bridge resonant conversion Device 103;
[0039]The output terminal of the photovoltaic module 101 is respectively connected to the input termi...
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The invention belongs to the technical field of photovoltaic power generation, and provides a solar charging circuit and a charging method thereof. The solar charging circuit is provided with a first-stage two-phase alternating type buck converter and a second-stage full-bridge resonant converter achieving synchronous rectification; a voltage command of a photovoltaic module is calculated through a voltage and a current of the photovoltaic module, then a current output command of the buck converter is obtained by utilizing an error between a feedback voltage of the photovoltaic module and the given voltage command through regulation of a voltage controller, and finally an output current of the buck converter is made to follow the command through a current controller; accordingly, a control voltage of a two-phase alternating PWM is generated, the conversion efficiency is high, the second-stage full-bridge resonant converter drives switches in the control-free phase shift method, control is similar to control of a single-stage circuit, and control of the controller is easy.
Description
technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a solar charging circuit and a charging method thereof. Background technique [0002] In the prior art, chargers for relatively high-power solar photovoltaic (PV) systems, the input of the high-power system is usually high voltage, but limited by the daily intake and the daily angle change with the seasons, the voltage under the difference between high and low wattage power generation The floating range may be quite large, so it must be able to output electric energy under low-voltage input, and the output is generally a small floating value of the battery, which can be regarded as a fixed value. If the circuit architecture that can be used is non-isolated, it includes such as figure 1 The buck converter shown and figure 2 Buck-boost converter shown. The advantage of the step-down converter is simple control and high efficiency, but the disad...
Claims
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IPC IPC(8): H02J7/35G05F1/67H02M3/156H02M3/335
CPCG05F1/67H02J7/35H02M3/156H02M3/3353H02M1/0067Y02B70/10Y02E10/56
Inventor 吴国勇吴国军吴海洋翟基虎
Owner 深圳市拓革科技有限公司