CN1614840A - Method and apparatus for DC solid power control - Google Patents
Method and apparatus for DC solid power control Download PDFInfo
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- CN1614840A CN1614840A CN 200410041985 CN200410041985A CN1614840A CN 1614840 A CN1614840 A CN 1614840A CN 200410041985 CN200410041985 CN 200410041985 CN 200410041985 A CN200410041985 A CN 200410041985A CN 1614840 A CN1614840 A CN 1614840A
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Abstract
The power MOSFET is adopted to be as switch device. The digital switching signal is sent out to DC solidity power controller through computer. Then the digital switching signal is converted into driving switch signal for driving MOSFET switch. The DC solidity power controller not only has the feature of electromechanical breaker and high reliability of solidity relay, but so has the feature of providing status output in real time.
Description
Technical field
The present invention relates to the Electromechanical Control field, specifically is a kind of DC solid power controller.
Background technology
Traditional electromechanical circuit breaker and solid-state relay be not owing to there being built-in line status Acquisition Circuit, so do not have the real-time output function of line status; And because the electromechanical circuit breaker adopts the closing by hand mode more, thereby switching speed is slow, and can not realize computer remote control.Because the fast development of collecting and distributing control technology, usually need to gather in real time data such as voltage in the circuit, electric current, so that show on computers, store or print, judge or accident post analysis reason for operator's Real Time Observation, become a kind of pressing for so develop a kind of " digitlization " switch.
Summary of the invention
The method and the device that the purpose of this invention is to provide a kind of DC solid power control.The DC solid power controller is the contactless solid-state switch of the enough TTL/CMOS logic level control of a kind of energy; adopting power MOSFET (Metallic Oxide Semiconductor Field Effect Transistor) is switching device; except the characteristics that have online protection of electromechanical circuit breaker and solid-state relay high reliability concurrently; the characteristics that the real-time status of providing output also is provided; can be used as the renewal product of electromechanical circuit breaker and solid-state relay; be applied to resistive; various loads such as perception and capacitive realize that the switch of load is controlled and the remote central computer monitoring.
Technical scheme of the present invention is as follows:
The method of DC solid power control is characterized in that:
Computer sends " open-minded " or " shutoff " digital controlled signal, this digital controlled signal is converted into the driving switch signal of power MOSFET module by external interface circuit, driving power module MOSFET opens or turn-offs, thereby makes whole main line open or turn-off;
DC load input power MOSFET module, voltage detecting/the amplitude limiter circuit of power MOSFET module inside to the DC load amplitude limit after, the output direct current is to current detecting/amplitude limiter circuit, detected voltage signal is fed back to main control computer by external interface circuit, and the cut-off signals that produces during with overvoltage is sent into the MOSFET drive circuit;
Current detecting/the amplitude limiter circuit of power MOSFET module inside to the direct current amplitude limit after, the output direct current, and detected current signal is fed back to main control computer by external interface circuit, and the cut-off signals that produces during simultaneously with overcurrent is sent into the MOSFET drive circuit.
The DC solid output control device is characterized in that:
Computer control signal after the external interface circuit conversion is input to the drive circuit input by circuit interface, and via the drive signal output output driving switch signal of drive circuit, the driving switch signal is linked into the controlled stage of power MOSFET module;
The input utmost point link load direct-flow input end of power MOSFET module, the output stage link load dc output end of power MOSFET module; The input of power MOSFET module, output stage are linked into circuit interface respectively, and voltage, the current output signal of this circuit interface are linked into main control computer by external interface circuit; The input of power MOSFET module, output stage are linked into voltage, the current feedback signal receiving port of drive circuit respectively.
The method of described DC solid power control is characterized in that between circuit interface and drive circuit photoelectrical coupler being arranged.
Described DC solid output control device is characterized in that the circuit interface of receiving of photoelectrical coupler, and the secondary side of photoelectrical coupler is received the input of drive circuit; What photoelectrical coupler was selected for use is the unidirectional optocoupler of the PC817 model of Japanese Sharp (Sharp) company production.
Described DC solid output control device, what it is characterized in that power MOSFET module selects for use is NID5001N type power MOSFET (the Metallic OxideSemiconductor Field Effect Transistor) device that ON (ON Semiconductor) company produces.
External interface circuit is the common interface circuit of serial data communication.
Operation principle of the present invention is as follows:
When computer when the DC solid power controller sends " open-minded " digital controlled signal, this digital controlled signal is opened signal by the driving that interface circuit is converted into power MOSFET, driven MOS FET is open-minded, thereby make whole main line open-minded, in like manner, when computer when the DC solid power controller sends " shutoff " digital controlled signal, this digital controlled signal is converted into the driving cut-off signals of power MOSFET by interface circuit, turn-off the driving of MOSFET, thereby cut off whole main line.By interface circuit, current detecting/amplitude limit and voltage detecting/amplitude limiter circuit are in real time to computer outlet line current electric current and voltage condition.In case overcurrent, overvoltage and fault such as overheated take place, and current detecting/amplitude limit, voltage detecting/amplitude limit and the overheating protection circuit in the DC solid power controller sends the drive signal of cutting off MOSFET immediately, cuts off main line.
The present invention has the following advantages:
1, real-time status monitoring
For solving the shortcoming that electromechanical circuit breaker and solid-state relay do not have the real-time output function of line status, realize the computer remote condition monitoring of circuit, DC solid power controller built-in voltage and current detecting/amplitude limiter circuit, promptly in direct current input main line, add voltage detecting/amplitude limiter circuit and come real-time measurement circuitry voltage, and be converted into the voltage detection signal that computer can be discerned by interface circuit.In main circuit, seal in current detecting/amplitude limiter circuit, the electric current in the main circuit is converted into the current detection signal that computer can be discerned, pass to computer by interface circuit.
2, overvoltage, overcurrent and overtemperature protection
For solving because the infringement that overvoltage, overcurrent and problems of excessive heat may be caused the DC solid power controller; be provided with overvoltage, overcurrent and overheating protection circuit in controller inside; promptly when the voltage of main line is higher than certain value; voltage limiter circuit blocks the MOSFET drive signal; cut off main line; thereby alarm signal is sent in the rising of restriction main circuit voltage simultaneously, guarantees the safety of main circuit.Equally, when the electric current of main line was higher than certain value, the current limit circuit blocked the MOSFET drive signal, cut off main line, thereby alarm signal is sent in the rising of restriction main circuit current simultaneously.The inner main heater members of DC solid power controller is a power MOSFET, by in the MOSFET inside modules temperature sensing circuit being set, when the temperature rise of MOSFET during greater than permissible value, promptly sends the driving that signal blocks MOSFET, realizes overheat protective function.
3, anti-circuit disturbs
For the misoperation of the unfavorable factor such as the voltage/current spike effectively avoiding producing and the DC solid power controller that may cause thus, considered the isolation (as shown in Figure 3) of main line and control circuit during the design of DC solid power controller such as the load saltus step.Because the power MOSFET as switching device is the voltage-type field controller, turning on and off does not almost have electric current, so utilize photoelectrical coupler can realize the driving of control signal to power MOSFET, realized the isolation of main line and control circuit simultaneously, improved the reliability of electric.
4, quick action
For satisfying the great majority requirement of response fast.It is switching device that the DC solid power controller is selected power MOSFET for use, and the time that turns on and off of power MOSFET is very short, generally in the microsecond level, so under the rated condition switching time of DC solid power controller can accomplish that tens microseconds are to the hundreds of microsecond; When load current is rated current,, be generally tens microseconds break time if overvoltage, overcurrent, fault such as overheated take place; The time of overcurrent and short-circuit protection also is tens microseconds generally, much smaller than the operate time of electromechanical circuit breaker, can realize high-speed switch.
5, high reliability
For improving the reliability of DC solid power controller, selected for use power MOSFET as switching device, power MOSFET is a kind of high reliability power electronic device that occurs the nineties, there is not mechanical contact, phenomenons such as the machinery of contact and electrical wear and contact bouncing, shake when therefore just not having switch, so controller can reach action message 1,000,000 times under nominal load, satisfy of the requirement of general occasion to reliability.
6, environmental suitability is strong
For solve the DC solid power controller the environmental suitability problem, adopted full cavity type structure, improved radiating efficiency on the one hand, simultaneously can shield electromagnetic, prevent extraneous electromagnetic interference; The controller internal circuit board is taked whole dosing technology, to satisfy the requirement of shock resistance, vibration; Controller is taked the lead-in wire mode of aviation plug, has improved the integral protection grade of shell; Simultaneously, the quiescent dissipation of DC solid power controller is mainly produced by the conducting resistance in the power MOSFET, and the conducting resistance of MOSFET is generally tens m Ω, so the power consumption under rated current is quite little.As junction temperature in the MOSFET is 25 ℃, V
DS=10V, the on-state impedance when load current is 10A is 20m Ω, then the quiescent dissipation of this power MOSFET only is about 2W, works long hours also can not produce very big caloric value.Owing to taked above-mentioned measure, the DC solid power controller can adapt to various harsh environmental conditions, satisfies the general operational requirement of land, naval vessel and aviation aspect.
Description of drawings
Fig. 1 is a built-in function block diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Fig. 3 is a real-time status monitoring functional-block diagram of the present invention.
Fig. 4 is overvoltage of the present invention, overcurrent and overheat protective function block diagram.
Fig. 5 is an anti-circuit interference function block diagram of the present invention.
Embodiment
Referring to Fig. 1-Fig. 5.
Computer control signal after the external interface circuit conversion, be input to the primitive plane of photoelectrical coupler by circuit interface, the secondary side of photoelectrical coupler is input to the drive circuit input, via the drive signal output output driving switch signal of drive circuit, the driving switch signal is linked into the controlled stage of power MOSFET module.
The input utmost point link load direct-flow input end of power MOSFET module, the output stage link load dc output end of power MOSFET module; The input of power MOSFET module, output stage are linked into circuit interface respectively, and voltage, the current output signal of this circuit interface are linked into main control computer by external interface circuit; The input of power MOSFET module, output stage are linked into voltage, the current feedback signal receiving port of drive circuit respectively.
What above-mentioned photoelectrical coupler was selected for use is the unidirectional optocoupler of the PC817 model of Japanese Sharp (Sharp) company production.Power MOSFET module is selected power MOSFET (the Metallic Oxide Semiconductor Field Effect Transistor) switching device of the NID5001N model of ON (ON Semiconductor) company production for use.The LM224 type low-voltage two-way operational amplifier of selecting for use in the drive circuit is that ON (ONSemiconductor) company produces.
Claims (5)
1, the method for DC solid power control is characterized in that:
Computer sends " open-minded " or " shutoff " digital controlled signal, this digital controlled signal is converted into the driving switch signal of power MOSFET module by external interface circuit, driving power module MOSFET opens or turn-offs, thereby makes whole main line open or turn-off;
DC load input power MOSFET module, voltage detecting/the amplitude limiter circuit of power MOSFET module inside to the DC load amplitude limit after, the output direct current is to current detecting/amplitude limiter circuit, detected voltage signal is fed back to main control computer by external interface circuit, and the cut-off signals that produces during with overvoltage is sent into the MOSFET drive circuit;
Current detecting/the amplitude limiter circuit of power MOSFET module inside to the direct current amplitude limit after, the output direct current, and detected current signal is fed back to main control computer by external interface circuit, and the cut-off signals that produces during simultaneously with overcurrent is sent into the MOSFET drive circuit.
2, DC solid output control device is characterized in that:
Computer control signal after the external interface circuit conversion is input to the drive circuit input by circuit interface, and via the drive signal output output driving switch signal of drive circuit, the driving switch signal is linked into the controlled stage of power MOSFET module;
The input utmost point link load direct-flow input end of power MOSFET module, the output stage link load dc output end of power MOSFET module; The input of power MOSFET module, output stage are linked into circuit interface respectively, and voltage, the current output signal of this circuit interface are linked into main control computer by external interface circuit; The input of power MOSFET module, output stage are linked into voltage, the current feedback signal receiving port of drive circuit respectively.
3, the method for DC solid power control according to claim 1 is characterized in that between circuit interface and drive circuit photoelectrical coupler being arranged.
4, DC solid output control device according to claim 2 is characterized in that the circuit interface of receiving of photoelectrical coupler, and the secondary side of photoelectrical coupler is received the input of drive circuit; What photoelectrical coupler was selected for use is the unidirectional optocoupler of PC817 model.
5, DC solid output control device according to claim 2, what it is characterized in that power MOSFET module selects for use is NID5001N type power MOSFET device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410041985 CN1614840A (en) | 2004-09-11 | 2004-09-11 | Method and apparatus for DC solid power control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410041985 CN1614840A (en) | 2004-09-11 | 2004-09-11 | Method and apparatus for DC solid power control |
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| CN1614840A true CN1614840A (en) | 2005-05-11 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356648C (en) * | 2005-11-17 | 2007-12-19 | 南京航空航天大学 | Multipath solid-state power switch digitized integration controlling method |
| CN101651336B (en) * | 2009-09-16 | 2012-01-11 | 华为技术有限公司 | Distribution protection method and distribution protection device |
| CN103152028A (en) * | 2013-01-31 | 2013-06-12 | 南京南瑞继保电气有限公司 | Device for improving solid-state switch drive reliability |
| CN103158641A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | Intelligent distribution box |
| CN103166314A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | Direct current solid state power control system |
| CN105425091A (en) * | 2015-11-09 | 2016-03-23 | 上海凌翼动力科技有限公司 | Large-power circuit connection resistance fault dynamic simulation system and method, and application |
| CN105896938A (en) * | 2016-04-29 | 2016-08-24 | 清华大学 | Power electronic device drive circuit based on current measurement, and control method for power electronic device drive circuit |
| CN113655739A (en) * | 2021-07-22 | 2021-11-16 | 北京卫星制造厂有限公司 | Configurable digital solid-state power distribution system based on FPGA |
| US11239652B2 (en) | 2018-12-26 | 2022-02-01 | Eaton Intelligent Power Limited | Compliant, hazardous environment circuit protection devices, systems and methods |
| US11270854B2 (en) | 2018-12-26 | 2022-03-08 | Eaton Intelligent Power Limited | Circuit protection devices, systems and methods for explosive environment compliance |
| US11303111B2 (en) | 2018-12-26 | 2022-04-12 | Eaton Intelligent Power Limited | Configurable modular hazardous location compliant circuit protection devices, systems and methods |
| US11615925B2 (en) | 2018-12-26 | 2023-03-28 | Eaton Intelligent Power Limited | Hazardous location compliant circuit protection devices having enhanced safety intelligence, systems and methods |
-
2004
- 2004-09-11 CN CN 200410041985 patent/CN1614840A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356648C (en) * | 2005-11-17 | 2007-12-19 | 南京航空航天大学 | Multipath solid-state power switch digitized integration controlling method |
| CN101651336B (en) * | 2009-09-16 | 2012-01-11 | 华为技术有限公司 | Distribution protection method and distribution protection device |
| CN103158641A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | Intelligent distribution box |
| CN103166314A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | Direct current solid state power control system |
| CN103152028A (en) * | 2013-01-31 | 2013-06-12 | 南京南瑞继保电气有限公司 | Device for improving solid-state switch drive reliability |
| CN105425091B (en) * | 2015-11-09 | 2018-07-27 | 上海凌翼动力科技有限公司 | High-power circuit connects Resistance Fault dynamic simulator system and method, application |
| CN105425091A (en) * | 2015-11-09 | 2016-03-23 | 上海凌翼动力科技有限公司 | Large-power circuit connection resistance fault dynamic simulation system and method, and application |
| CN105896938A (en) * | 2016-04-29 | 2016-08-24 | 清华大学 | Power electronic device drive circuit based on current measurement, and control method for power electronic device drive circuit |
| CN105896938B (en) * | 2016-04-29 | 2019-04-02 | 清华大学 | A kind of power electronic devices driving circuit and its control method based on current measurement |
| US11239652B2 (en) | 2018-12-26 | 2022-02-01 | Eaton Intelligent Power Limited | Compliant, hazardous environment circuit protection devices, systems and methods |
| US11270854B2 (en) | 2018-12-26 | 2022-03-08 | Eaton Intelligent Power Limited | Circuit protection devices, systems and methods for explosive environment compliance |
| US11303111B2 (en) | 2018-12-26 | 2022-04-12 | Eaton Intelligent Power Limited | Configurable modular hazardous location compliant circuit protection devices, systems and methods |
| US11615925B2 (en) | 2018-12-26 | 2023-03-28 | Eaton Intelligent Power Limited | Hazardous location compliant circuit protection devices having enhanced safety intelligence, systems and methods |
| US11967478B2 (en) | 2018-12-26 | 2024-04-23 | Eaton Intelligent Power Limited | Circuit protection devices, systems and methods for explosive environment compliance |
| CN113655739A (en) * | 2021-07-22 | 2021-11-16 | 北京卫星制造厂有限公司 | Configurable digital solid-state power distribution system based on FPGA |
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