A kind of inverter power supply device
A technology of inverter power supply and DC power supply, which is applied in the direction of output power conversion devices, electrical components, and adjustment of electric variables. Simple control and reduced switching loss
Active Publication Date: 2016-05-25
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0005] Depend on figure 2 It can be seen that the output of the flyback circuit in the front stage of the traditional micro-inverter is not a constant DC, and reactive power regulation cannot be realized.
In addition, in the micro-inverter with this structure, the transformer T is not only used for energy storage, but also for energy transmission, so an air gap needs to be opened, so the front-stage flyback circuit cannot increase the power, even if Great power, low efficiency
Moreover, in order to achieve soft switching, it is not only necessary to select a higher-performance controller, but also to design more complex, sometimes it is necessary to add some auxiliary circuits
Method used
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[0045] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.
[0046] Such as image 3 Shown is a schematic diagram of the principle of the inverter power supply device according to the embodiment of the present invention.
[0047] The inverter power supply device is used to convert the DC power output by the DC power supply 30 into AC power, and includes a front-stage current feeding circuit 31 and a rear-stage inverter circuit 32 . Wherein, the current feeding circuit 31 includes: a half-bridge converter 311 , an isolation transformer 312 and a rectifying circuit 313 connected in series; the latter inverter circuit 32 is specifically a single BUCK inverter circuit.
[0048] Figure 4 It is a schematic diagram of a specific topology structure of an inverter power supply de...
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The invention discloses an inverter power source device used for converting a direct current output by a direct-current power source into an alternating current. The inverter power source device comprises a preceding-stage current feed circuit and a posterior-stage inverter circuit. The current feed circuit comprises a half-bridge converter, an isolation transformer and a rectifying circuit, wherein the half-bridge converter, the isolation transformer and the rectifying circuit are connected in series in sequence. The posterior-stage inverter circuit is a single BUCK inverter circuit. Due to the inverter power source device, under the condition that energy conversion efficiency is ensured, complexity of control can be reduced, and reactive power adjusting and power expansion are convenient.
Description
technical field [0001] The invention relates to the technical field of voltage conversion, in particular to an inverter power supply device. Background technique [0002] At present, in the field of photovoltaic power generation, integrated grid-connected power generation is still the mainstay. The photovoltaic grid-connected power generation system converts the direct current of solar panels into alternating current with the same frequency and phase as the grid voltage through the grid-connected inverter and transmits it to the grid. Therefore, the grid-connected inverter is the core equipment of the photovoltaic grid-connected power generation system. Its reliability, efficiency and safety will affect the entire power generation system, and are directly related to the power generation and operation stability of the power station. [0003] The photovoltaic grid-connected micro-inverter (referred to as micro-inverter) is connected to a single photovoltaic module, which can ...
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IPC IPC(8): H02M7/537H02M3/337
Inventor 赵为倪华姚丹曹金虎
Owner SUNGROW POWER SUPPLY CO LTD