CN106155136A - Temperature control circuit for power device - Google Patents
Temperature control circuit for power device Download PDFInfo
- Publication number
- CN106155136A CN106155136A CN201610794480.2A CN201610794480A CN106155136A CN 106155136 A CN106155136 A CN 106155136A CN 201610794480 A CN201610794480 A CN 201610794480A CN 106155136 A CN106155136 A CN 106155136A
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- CN
- China
- Prior art keywords
- temperature
- module
- analog switch
- comparison circuit
- input
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
Present invention provide for the temperature control circuit of power device, comprise control module, temperature detecting module, analog switch module and comparison circuit module；Temperature detecting module comprises at least three temperature detecting unit；Analog switch module comprises at least one analog switch chip；Comparison circuit module comprises at least two comparison circuit unit；In analog switch chip, the address choice end of same group of analog switch and analog switch input correspondence connect outfan and the input of same comparison circuit unit；The input of comparison circuit unit and the outfan of each temperature detecting unit or connected with the outfan one_to_one corresponding being connected the analog switch having other comparison circuit unit；The beneficial effects of the present invention is the limitation solving existing single temperature acquisition point to power circuit temperature acquisition, also solve control part multipoint system everywhere temperature sampling point all to be sampled brought problem of resource waste simultaneously, save the resource of control part.
Description
Technical field
The present invention relates to the observation and control technology field of wind power plant, be particularly used for the temperature control circuit of power device.
Background technology
In wind electricity change paddle driver, include power circuit, and power device often produces substantial amounts of heat, for protection
Power device is unlikely to overheated and damages, and needs in the controlling to be monitored its temperature, to temperature too high time close output,
To protect power device；Existing detection method the most only detects " maximum temperature point " at one, and this " maximum temperature point " is to research and develop
Journey is tested gained repeatedly, when this test point temperature reaches to a certain degree, just regards as power device overheated, and then implement to protect
Protect measure；This detection method it " maximum temperature point " is measured in the case of system worked well in the lab, and real
During border uses, device is abnormal unavoidable, it is possible to there will be the somewhere temperature feelings apparently higher than former " maximum temperature point "
Condition, at this moment temperature control system will cause the damage of components and parts because of missing inspection；It addition, power circuit has some sometimes, in order to
During the detection of upper method, each part is required for a temperature control detecting system and is connected to control circuit, and it is believed by control circuit again
Number processing, this there is also certain waste to the resource of control part；In order to solve these problems, it is necessary to design one
New temperature control circuit.
Summary of the invention
In order to solve problem above, the invention provides one and possess multipoint acquisition, and save the temperature controlling part resource
Control circuit.
For achieving the above object, present invention employs following technical scheme:
For the temperature control circuit of power device, comprise control module and temperature detecting module；Also comprise analog switch module with than
Relatively circuit module；Described temperature detecting module comprises at least three temperature detecting unit, for by the temperature of each power device
Be converted to the signal of telecommunication of coupling；Described analog switch module comprises at least one analog switch chip；Described comparison circuit
Module comprises at least two comparison circuit unit；In analog switch chip, address choice end and the simulation of same group of analog switch are opened
Close input correspondence and connect outfan and the input of same comparison circuit unit, and when address choice end input high level,
The outfan of each analog switch is all higher with the voltage of comparison circuit unit/or the conducting of relatively low side input；Comparison circuit list
The outfan of input and each temperature detecting unit of unit or with the output being connected the analog switch having other comparison circuit unit
End one_to_one corresponding is connected；The combination of analog switch module and comparison circuit module connects in order to select temperature detecting unit to be detected
Temperature maximum, and the signal of telecommunication that this temperature maximum is mated by the output of analog switch module be transferred to control mould
Block input, is carried out corresponding temperature control by control module and processes.
Further, described temperature detecting module comprises critesistor or thermistor type sensors, and each temperature-sensitive electricity
The temperature coefficient of resistance or thermistor type sensors is just all being all or is being all negative.
Further, described comparison circuit unit includes positive-feedback circuit, to avoid being compared voltage in voltage phase
Near critical point produces output vibration.
Further, described control module comprises control unit, and described control unit comprises microprocessor or microcontroller
Device.
Preferably, described control module also comprises A/D convertor circuit；The input of A/D convertor circuit, output are opened with simulation respectively
Close the output of module, the input correspondence of control unit is connected, and is converted to numeral letter with the signal of telecommunication mated by temperature maximum
Carry out after number calculating and control process.
Preferably, described control module also comprises reference voltage module and reference voltage comparison circuit, this reference voltage ratio
The input of relatively circuit connects the outfan of benchmark voltage module and the outfan of analog switch module respectively, and reference voltage compares
The outfan of circuit is connected with the input of control unit, in order to detect whether temperature voltage transfinites and carry out at the control of correspondence
Reason.
The present invention is compared by the magnitude of voltage fed back temperature detecting unit with comparison circuit unit, the most electric
The output of road unit controls the address choice end of analog switch chip, and analog switch selects the coupling signal of telecommunication input that temperature is higher
End turns on, and output is connected to another comparison circuit unit and compares, and constantly compares with this, selects, thus finally gives each
The maximum temperature matching voltage value of place's temperature detecting unit, then output is to control module；The present invention can be used in same power electricity
Road comprises the situation of many places temperature detecting point, it is also possible to be used in temperature when same power range system is divided into some
Detection, simultaneously as this partial circuit is near power circuit portion, this way decrease power circuit to control circuit length away from
From transmission signal, decrease the fault rate of signals transmission, also save the resource controlling part microprocessor.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings and the technical scheme in the present invention is further illustrated by embodiment.
A kind of temperature control circuit for power device, comprises control module and temperature detecting module；Also comprise analog switch
Module and comparison circuit module；Described temperature detecting module comprises three temperature detecting units, as it is shown in figure 1, temperature detection
Unit comprises semistor RT1, RT2 and RT3 of same specification；Each critesistor is close with power device to be installed,
The temperature making critesistor is equal or close with the temperature of power device；Critesistor RT1, RT2, RT3 are by electric with dividing potential drop
After the most corresponding parallel connection of resistance R19, R12, R6, by the signal of telecommunication that the power device temperature transition that it is detected is coupling；Described
Analog switch module comprise analog switch chip CD4053(i.e. U2)；Described comparison circuit module comprises with voltage comparator
U1A Yu U1B is two comparison circuit unit of core, as it is shown in figure 1, comparison circuit unit also comprise positive feedback resistor R2 with
R17, pull-up resistor R4 Yu R13, input series resistance R5, R7, R14, R15；The normal phase input end of voltage comparator U1A Yu U1B
The outfan being connected to voltage comparator by positive feedback resistor R2, R17 becomes positive-feedback circuit, to avoid voltage comparator
Outfan owing to being produced output vibration by the fluctuation comparing voltage；Owing to voltage comparator is usually OC export structure, therefore voltage
The outfan of comparator is connected to+15V feeder ear by pull-up resistor R4, R13 respectively；Same group of simulation in analog switch chip
The address choice end of switch and analog switch input correspondence connect outfan and input, Fig. 1 of same comparison circuit unit
In, analog switch input X0, the X1 corresponding to address choice end A and the comparison circuit unit corresponding to voltage comparator U1B
Corresponding connection, and limit conducting electric current to protect analog switch by resistance R18 Yu R11；When address choice end A is high level
Time, the X outfan of analog switch chip CD4053 i.e. turns on X1 input, and X1 input is by resistance R18 with voltage ratio relatively
Device U1B positive inputs one end and is connected；The X outfan of analog switch and the voltage higher side input of comparison circuit unit are i.e. described
End conducting, owing to the temperature coefficient of critesistor is just, so the temperature detection list that the X outfan of analog switch is higher with temperature
Unit is connected；When address choice end is low level, then the X outfan of analog switch turns on X0 input, and corresponding connection is still
It it is the temperature detecting unit that temperature is higher；X outfan is connected by the input of input resistance R7 and another comparator U1A；Electricity
The input of pressure comparison circuit unit corresponding to comparator U1A and outfan respectively with module switch input Y0, Y1 and B couple
Should be connected, when address choice end B is high level, the Y outfan of analog switch chip CD4053 i.e. turns on Y1 input, Y1
Input inputs one end by resistance R1 with voltage comparator U1A positive and is connected；Due to voltage comparator it is believed that not obtaining current,
The connected voltage of resistance R7 connection corresponding with temperature detecting unit RT2 or RT1 voltage is equal；Sentencing through over-voltage comparator U1A again
Disconnected compare with the selection of analog switch after, the Y outfan of analog switch export the maximum temperature pair that RT1, RT2, RT3 are detected
The signal of telecommunication answered, and export to control module carry out corresponding temperature control process；Described control module comprises MCU and AD conversion
Circuit；The input of A/D convertor circuit, output are corresponding with the input of the output Y end of analog switch, MCU respectively to be connected, with by temperature
The signal of telecommunication that maximum is mated carries out after being converted to digital signal calculating and control process.
When the critesistor selected is negative temperature coefficient, only the simulation of analog switch chip CD4053 in Fig. 1 need to be opened
Close input connection end X0 Yu X1, Y0 Yu Y1 mutually to exchange, then when the address choice end input high level of analog switch, right
The side answering the outfan of analog switch relatively low with voltage comparator input terminal voltage is connected, and analoging switch output end correspondence connects
Be still the temperature detecting unit that temperature is higher.
Compared by magnitude of voltage temperature detecting unit fed back with comparison circuit unit, simultaneously comparison circuit unit
Output control the address choice end of analog switch chip, analog switch selects the higher coupling electric signal input end of temperature to lead
Lead to, and output is connected to another comparison circuit unit and compares, and constantly compares with this, selects, thus finally give temperature everywhere
The maximum temperature matching voltage value of degree detector unit, then output is to control module；The present embodiment can be used in same power circuit
In comprise the situation of many places temperature detecting point, it is also possible to be used in temperature inspection when same power range system is divided into some
Surveying, simultaneously as this partial circuit is near power circuit portion, this way decreases the power circuit distance to control circuit
Transmission signal, decreases the fault rate of signals transmission, also saves the resource controlling part microprocessor.
Finally illustrating, above example is only in order to illustrate technical scheme and unrestricted.
Claims (6)
1., for the temperature control circuit of power device, comprise control module and temperature detecting module；It is characterized in that: also comprise simulation
Switch module and comparison circuit module；Described temperature detecting module comprises at least three temperature detecting unit, for by each merit
The temperature transition of rate device is the signal of telecommunication of coupling；Described analog switch module comprises at least one analog switch chip；Institute
The comparison circuit module stated comprises at least two comparison circuit unit；The address choosing of same group of analog switch in analog switch chip
Select end and the outfan of the analog switch input correspondence same comparison circuit unit of connection and input, and defeated at address choice end
When entering high level, the outfan of each analog switch is all higher with the voltage of comparison circuit unit/or the conducting of relatively low side input；
The outfan of the input of comparison circuit unit and each temperature detecting unit or be connected the simulation having other comparison circuit unit
The outfan one_to_one corresponding of switch is connected；The combination of analog switch module and comparison circuit module connects in order to select temperature detection
The temperature maximum that unit is detected, and the output biography that the signal of telecommunication mated by this temperature maximum is by analog switch module
It is handed to control module input, control module carries out corresponding temperature control and process.
Temperature control circuit for power device the most according to claim 1, it is characterised in that: described temperature detecting module
Comprise critesistor or thermistor type sensors, and the temperature coefficient of each critesistor or thermistor type sensors is all
Just or be all negative.
Temperature control circuit for power device the most according to claim 2, it is characterised in that: described comparison circuit unit
Include positive-feedback circuit, produce output vibration to avoid being compared voltage in the close critical point of voltage.
4. according to the temperature control circuit for power device described in any one of claim 1,2 or 3, it is characterised in that: described control
Molding block comprises control unit, and described control unit comprises microprocessor or microcontroller.
Temperature control circuit for power device the most according to claim 4, it is characterised in that: described control module also comprises
A/D convertor circuit；The input of A/D convertor circuit, output phase corresponding with the input of the output of analog switch module, control unit respectively
Even, carry out after being converted to digital signal with the signal of telecommunication mated by temperature maximum calculating and control process.
Temperature control circuit for power device the most according to claim 4, it is characterised in that: described control module also comprises
Reference voltage module and reference voltage comparison circuit, the input of this reference voltage comparison circuit connects benchmark voltage module respectively
The outfan of outfan and analog switch module, the outfan of reference voltage comparison circuit is connected with the input of control unit,
In order to detect the control process whether temperature voltage transfinites and carry out correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794480.2A CN106155136A (en) | 2016-08-31 | 2016-08-31 | Temperature control circuit for power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794480.2A CN106155136A (en) | 2016-08-31 | 2016-08-31 | Temperature control circuit for power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106155136A true CN106155136A (en) | 2016-11-23 |
Family
ID=57344991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610794480.2A Withdrawn CN106155136A (en) | 2016-08-31 | 2016-08-31 | Temperature control circuit for power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106155136A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581180A (en) * | 2019-01-17 | 2019-04-05 | 南京亚派科技股份有限公司 | A kind of IGBT module parallel temperature sensing circuit |
| CN109683643A (en) * | 2019-01-25 | 2019-04-26 | 创泽智能机器人股份有限公司 | A kind of temperature-control circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001169401A (en) * | 1999-12-02 | 2001-06-22 | Honda Motor Co Ltd | Controller for electric car |
| CN201075669Y (en) * | 2007-06-18 | 2008-06-18 | 深圳市中传电气技术有限公司 | System and device for multipath power unit temperature real time supervisory control in high power frequency converter |
| CN102142186A (en) * | 2011-03-01 | 2011-08-03 | 合肥国轩高科动力能源有限公司 | Remote monitoring system for lithium battery pack |
| CN203026913U (en) * | 2012-12-28 | 2013-06-26 | 广州三晶电气有限公司 | Temperature protection circuit |
| CN204373804U (en) * | 2015-02-07 | 2015-06-03 | 杭州国望科技有限公司 | Temperature polling instrument |
| CN206039327U (en) * | 2016-08-31 | 2017-03-22 | 重庆佩特电气有限公司 | A control by temperature change circuit for power device |
-
2016
- 2016-08-31 CN CN201610794480.2A patent/CN106155136A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001169401A (en) * | 1999-12-02 | 2001-06-22 | Honda Motor Co Ltd | Controller for electric car |
| CN201075669Y (en) * | 2007-06-18 | 2008-06-18 | 深圳市中传电气技术有限公司 | System and device for multipath power unit temperature real time supervisory control in high power frequency converter |
| CN102142186A (en) * | 2011-03-01 | 2011-08-03 | 合肥国轩高科动力能源有限公司 | Remote monitoring system for lithium battery pack |
| CN203026913U (en) * | 2012-12-28 | 2013-06-26 | 广州三晶电气有限公司 | Temperature protection circuit |
| CN204373804U (en) * | 2015-02-07 | 2015-06-03 | 杭州国望科技有限公司 | Temperature polling instrument |
| CN206039327U (en) * | 2016-08-31 | 2017-03-22 | 重庆佩特电气有限公司 | A control by temperature change circuit for power device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581180A (en) * | 2019-01-17 | 2019-04-05 | 南京亚派科技股份有限公司 | A kind of IGBT module parallel temperature sensing circuit |
| CN109683643A (en) * | 2019-01-25 | 2019-04-26 | 创泽智能机器人股份有限公司 | A kind of temperature-control circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161123 |