AC/DC power supply switching control system for inverter and method
An AC/DC power supply and AC power supply technology, applied in the power supply field, can solve the problems of the number of occupied chips, high hardware cost, limited I/O interface, etc., and achieve the effect of increasing driving power and reducing hardware cost.
Active Publication Date: 2019-10-22
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0004] In view of this, the object of the present invention is to provide an inverter AC and DC power switching control system and method to solve the problem in the related art that the auxiliary power switch control through the I / O interface of the chip makes the existing hardware cost high and requires The specific technical solution disclosed for the technical problem of occupying a limited number of I / O interfaces on the chip is as follows:
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[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] See figure 1 , shows a schematic structural diagram of an inverter AC and DC power switching control system provided by the present invention, the system includes a DC power module 1 , an AC power module 2 and a power switching control module 3 .
[0048] The input terminal of the DC power supply module 1 is connected to a DC power su...
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The invention provides an AC / DC power supply switching control system for an inverter and method. In the system, the input end of a power supply switching control module is directly connected with anoutput end of a DC power supply module, that is, output voltage signals of the DC power supply module are acquired. The output voltage signals are converted to control signals for controlling an on oroff state of an AC power supply module. The control system directly converts the output voltage signals of the DC power supply module into the control signals for controlling the working state of theAC power supply module, that is, the high-power voltage signals outputted by the DC power supply module are directly used to control the working state of the AC power supply module. Thus, the processof signal acquisition and analysis and the like by a digital chip is not needed, the I / O interface of the digital chip does not need to be occupied, increasing of the driving power of the control signals by the driving circuit is not needed, and the hardware cost is reduced.
Description
technical field [0001] The invention belongs to the field of power supply technology, and in particular relates to an AC and DC power switching control system and method for an inverter. Background technique [0002] In the field of photovoltaic power generation, the fan, driver and controller of the inverter need to be powered by auxiliary power. [0003] The auxiliary power supply of the inverter usually includes DC auxiliary power supply and AC auxiliary power supply. In different situations, different auxiliary power supplies are used to supply power to the inverter. For example, when the inverter is connected to the grid for power generation, the DC auxiliary power supplies power for the inverter. In order to reduce the standby loss of the AC power supply, when the DC auxiliary power supplies power, the AC Auxiliary power supply; when the inverter is in standby, in order to meet the functions of PID repair at night and inverter software upgrade, AC auxiliary power supp...
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IPC IPC(8): H02M1/10
CPCH02M1/10
Inventor 李随军张骕骦
Owner SUNGROW POWER SUPPLY CO LTD