Power supply device, control method thereof and power supply system using power supply device
A power supply and control circuit technology, which is applied to control/regulation systems, instruments, electrical components, etc., can solve the problems of large conduction loss, high operating temperature, and low overall efficiency of the power supply 10 and the power supply system 1. , to achieve the effect of low operating temperature, less power loss, preventing reverse current or operating frequency from being too high
Active Publication Date: 2014-09-10
DELTA ELECTRONICS INC
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Problems solved by technology
Although the output protection circuit 102 composed of a diode D can effectively prevent reverse current from occurring, the diode D has a large conduction voltage drop, so the conduction loss of the diode D is relatively large, and the power supply 10 and the power supply The overall efficiency of the power supply system 1 is low, and the operating temperature is high
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[0073] Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and drawings therein are illustrative in nature and not limiting. this invention.
[0074] see Figure 4A and cooperate Figure 4B ,in Figure 4A It is a schematic block diagram of a power supply system in a preferred embodiment of the present invention, and the first Figure 4B It is a schematic diagram of the corresponding relationship between the DC gain and the operating frequency of the power converter of the preferred embodiment of the present invention. like Figure 4A As shown, the power supply system 3 of the present invention has a plurality of power supplies 4 connected in parallel to provide an output volt...
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The invention discloses a power supply device, a control method of the power supply device, and a power supply system using the power supply device, wherein the power supply device comprises a power converter used for converting input voltage into internal output voltage, an output protective circuit which is electrically connected between an output end of the power converter and an output end of the power supply device and is used for protecting the power supply device for normal work by the connecting or disconnecting action, and a control unit which is electrically connected with the output protective circuit and is used for controlling the work of the output protective circuit, wherein when the working frequency of the power supply device is more than the first default frequency value and the value of the internal output voltage is more than the first default voltage value, the control unit can be used for controlling the output protective circuit to be stopped by outputting a first control signal to a control end of the output protective circuit. Through the invention, the power supply devices which work normally can be prevented from being burnt out by reverse current or overhigh working frequency caused by one faulted power supply device.
Description
technical field [0001] The present invention relates to a power supply, a control method of the power supply and a power supply system, especially a high-reliability power supply and a control method of the power supply suitable for a redundant power supply system. The power supply system uses multiple power supplies to work in parallel. Background technique [0002] In recent years, with the advancement of science and technology, electronic products with various functions have been gradually developed. These electronic products with various functions not only meet the various needs of people, but also integrate into everyone's needs. Daily life makes people's life more convenient. [0003] These various electronic products with different functions are composed of various electronic components, and the power supply voltage required by each electronic component is not the same. Therefore, the AC power (mains power) provided by the current power supply system is not suitable ...
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IPC IPC(8): H02M3/335H02M3/338H02H7/12
Inventor 吴洪洋辛晓妮王彬吴其昆
Owner DELTA ELECTRONICS INC