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Power supply module, power supply system composed thereof, and control method of power supply system

A power module, power output technology, applied in control/regulation systems, electrical components, regulating electrical variables, etc., can solve problems such as increasing circuit complexity, reducing power supply reliability, and reducing power supply applicability

Active Publication Date: 2018-09-07
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the external circuit control method and the forced current sharing method use more complex external detection and control circuits, which increases the complexity of the circuit and reduces the reliability of the power supply in many special environments.
[0005] The master-slave control method uses the main power module to control other slave power modules. This working method uses N power modules, one of which (master control unit) works in constant voltage output mode, and the remaining N-1 power modules work In the constant current working mode, the N-1 module power supplies control their own current through the current error signal with the main control unit, so as to achieve the purpose of current sharing. Usually the main control unit is required to have a current signal output function, while the remaining N- One module requires current signal receiving function, which requires separate main power supply and slave power supply to supply power to the main power module and slave power module, which also increases the complexity of the circuit and reduces the applicability of the power supply

Method used

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  • Power supply module, power supply system composed thereof, and control method of power supply system
  • Power supply module, power supply system composed thereof, and control method of power supply system
  • Power supply module, power supply system composed thereof, and control method of power supply system

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no. 1 example

[0050] figure 1 It is a functional block diagram of the power module of the first embodiment of the present invention, and the power module includes:

[0051] Including at least 7 terminals: power input positive Vin, power input ground GND, power output positive Vo, power output ground 0V, output voltage adjustment terminal Trim, current signal input terminal Sig- and control output terminal Sig+;

[0052] Also includes unit circuits: isolated power conversion circuit, control circuit, current detection circuit, sampling control circuit and comparison control circuit,

[0053] The connection relationship is: the input terminal of the isolated power conversion circuit is connected to the power input positive Vin and the power input ground GND, the output terminal of the isolated power conversion circuit is connected to the power output positive Vo and the power output ground 0V, and one end of the isolated power conversion circuit is connected to the control circuit The input ...

no. 2 example

[0080] Such as figure 2 Shown is the functional block diagram of the second embodiment. It can be seen from the figure that the power module includes at least 6 terminals: power input positive Vin, power ground GND, power output positive Vo, output voltage adjustment terminal Trim, current signal input terminal Sig- and Control output Sig+;

[0081] Also includes: non-isolated power conversion circuit, control circuit, circuit detection circuit, comparison control circuit: the connection relationship is: the input terminal of the non-isolated power conversion circuit is connected to the power input positive Vo and the power ground GND, and the output of the non-isolated power conversion circuit The terminal is connected to the power output positive Vo and the control circuit; the input terminal of the current detection circuit is connected to the power input positive Vo, the output terminal of the current detection circuit is connected to the first input terminal of the compa...

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PUM

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Abstract

The invention provides a power supply module, a power supply system composed of the power module and a control method of the power system. The power module comprises a power conversion circuit, a control circuit, a sampling feedback circuit, a circuit detection circuit, and further comprises at least one comparison control circuit. The power supply system comprises N power supply modules in parallel, wherein N is a natural number greater than 1; any one of the power supply modules is used as a main module, and the other N-1 power modules are used as slave modules; a current signal output by the main module is fed back to the slave module through an external connection wire; the slave module receives the current signal of the main module and compares the current signal with its own output current; the output current of the slave module is kept the same as the output current of the main module by adjusting the output power of the slave module by the slave module, so as to achieve the purpose of parallel current sharing output of the N power supply modules. The parallel current sharing modules of the present invention are all identical, and the modules can be directly used in parallelcurrent sharing, without any external devices or equipment added, the circuit design is simplified, and the reliability of the power supply is improved.

Description

technical field [0001] The invention relates to the field of power circuits, in particular to a power module, a power system composed of it and a control method for the power system. Background technique [0002] With the emergence and development of a large number of electronic equipment systems, especially the wide application of communication, computer and automation equipment, the demand for power supply is getting higher and higher. The variety of requirements and the demand for power improvement make the power supply parallel technology develop rapidly. In this case, the output regulated power supplies cannot be directly used in parallel. Parallel current sharing technology must be used to ensure that each module shares the same load current. Otherwise, some parallel modules will run in light-load or no-load mode, while In the case of heavy load or even overload mode, it is very easy to cause damage to the power supply. [0003] Commonly used parallel current sharing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M3/156
CPCH02M1/00H02M3/156Y02B70/10
Inventor 张志成王国云冯刚
Owner MORNSUN GUANGZHOU SCI & TECH
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