Topology structure, modulation method, device and storage medium of single-phase inverter
A single-phase inverter, topology technology, applied in output power conversion devices, conversion of AC power input to DC power output, climate sustainability, etc. The problem of high operating frequency can achieve the effect of strengthening the heat dissipation design, improving the efficiency of the power system, and reducing the operating frequency
Active Publication Date: 2021-08-03
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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[0002] In the prior art, for a single-phase inverter with a power level of tens of kW, the switching frequency design under the SPWM modulation mode is generally around 20kHz. When modulating a single-phase inverter, the operating frequency of each switching device Very high, the loss of the switching device is very large, thus reducing the working efficiency of the power system
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[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0035] see figure 1 , is a schematic structural diagram of a topology structure of a single-phase inverter provided by an embodiment of the present invention.
[0036]An embodiment of the present invention provides a topology of a single-phase inverter, including: a DC voltage input terminal, a DC filter inductor L in , DC bus capacitor C bus , AC filter inductor L o , four identical switching devices and AC voltage output terminals; wherein, the first switching...
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The invention discloses a modulation method of a single-phase inverter. When the single-phase inverter works in a preset first cycle, the first switching device and the second switching device are modulated according to the SPWM method , performing fundamental frequency modulation on the third switching device and the fourth switching device; when the single-phase inverter works in a preset second cycle, The device performs fundamental frequency modulation, and modulates the third switching device and the fourth switching device according to the SPWM method. The embodiment of the present invention also discloses a topology structure of a single-phase inverter, and multiple embodiments are adopted to effectively reduce the loss of switching devices.
Description
technical field [0001] The present invention relates to the technical field of inverters, in particular to a single-phase inverter topology, modulation method, device, and storage medium. Background technique [0002] In the prior art, for a single-phase inverter with a power level of tens of kW, the switching frequency design under the SPWM modulation mode is generally around 20kHz. When modulating a single-phase inverter, the operating frequency of each switching device High, the loss of the switching device is very large, thereby reducing the working efficiency of the power system. Contents of the invention [0003] Embodiments of the present invention provide a topology structure, a modulation method, a device, and a storage medium of a single-phase inverter, which can effectively reduce the loss of switching devices. [0004] An embodiment of the present invention provides a topology structure of a single-phase inverter, including: a DC voltage input terminal, a DC f...
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IPC IPC(8): H02M7/5395
CPCH02M7/5395H02M1/0054Y02B70/10
Inventor 史尤杰杨煜许树楷李岩郑耀东雷博陈俊
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD