Digital protection circuit for multi-channel DC/DC insulation power
A technology for isolating power supply and protecting circuits, which is applied in emergency protection circuit devices, electrical components, output power conversion devices, etc., and can solve problems such as trouble, troubleshooting, and affecting power control.
Inactive Publication Date: 2009-09-16
HARBIN ENG UNIV
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Problems solved by technology
This will bring some unnecessary troubles to the control of the power supply. If the analog circuit is used, if a parameter is not set correctly during the debugging of the equipment, it will seriously affect the control of the equipment supported by the power supply, and it will be more troublesome to troubleshoot errors.
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[0009] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0010] Power module a to power module n are n DC / DC isolated power modules. Each power module generally only provides one voltage. The value of n is related to the actual application system. Of course, the smaller the value of n, the better.
[0011] The function of TVS diode 0 is to be in a high-impedance state under normal conditions, and it will be turned on instantly when the voltage exceeds the threshold of the tube itself. When the external power supply is turned on, a high-voltage impact will be generated instantaneously, which will make the TVS diode 0 conduct, and form a loop with the input common terminal. After the impact, the diode will return to its normal state. In this way, the impact of impact on the power supply equipment is reduced, and it plays a protective role against input impact.
[0012] The input primary power supply voltage is converted ...
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The invention provides a digital protection circuit for multiple DC / DC isolated power supplies. It includes TVS diode, first AD converter, isolation device, second AD converter, single chip microcomputer, display part, temperature sensor, control interface and power module; TVS diode is connected to the input end of power module; first AD converter analog The interface is connected to the external power supply input, and the digital part interface is input to the single-chip microcomputer through the isolation device; the second AD converter analog interface is connected to the output of the power supply module, and the digital part interface is input to the single-chip microcomputer; the display part, temperature sensor, and control interface are directly connected to the single-chip microcomputer; The control signal generated by the single chip microcomputer is transmitted to the power supply module through the isolation device. This circuit is a digital circuit that can flexibly set the required functions and can be controlled remotely, and has strong anti-interference ability. It can not only remotely control the opening and closing of the DC / DC isolated power module group, but also monitor and detect its working status and working environment.
Description
(1) Technical field [0001] The invention relates to a protection control circuit, in particular to a protection control circuit of a DC / DC power module group. (2) Background technology [0002] Although the DC / DC power supply module with isolation function generally has a protection function inside, when the power is large and multiple power supplies are required to work at the same time, an external circuit with a protection function must be added. Control multiple power modules, overvoltage / undervoltage detection of input / output voltage, temperature detection, and certain processing methods for input impact and surge. [0003] Multiple such DC / DC power supplies are often required in the power supply equipment of complex systems. This brings some unnecessary troubles to the control of the power supply. If an analog circuit is used, if a parameter is not set correctly during the debugging of the equipment, it will seriously affect the control of the equipment supported by t...
Claims
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IPC IPC(8): H02H7/12H02M1/32
Inventor 郭立民司锡才蒋伊琳肖创易
Owner HARBIN ENG UNIV