WO2015121721A1 - Circuit for multipoint temperature measurement, especially in power electronic converters - Google Patents

Circuit for multipoint temperature measurement, especially in power electronic converters Download PDF

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Publication number
WO2015121721A1
WO2015121721A1 PCT/IB2014/067289 IB2014067289W WO2015121721A1 WO 2015121721 A1 WO2015121721 A1 WO 2015121721A1 IB 2014067289 W IB2014067289 W IB 2014067289W WO 2015121721 A1 WO2015121721 A1 WO 2015121721A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
voltage
temperature
temperature sensor
output
Prior art date
Application number
PCT/IB2014/067289
Other languages
English (en)
French (fr)
Inventor
Jarosław ZAŁĘSKI
Krzysztof STĘPIEŃ
Original Assignee
Zakład Energoelektroniki Twerd Michał Twerd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zakład Energoelektroniki Twerd Michał Twerd filed Critical Zakład Energoelektroniki Twerd Michał Twerd
Priority to CN201480003730.5A priority Critical patent/CN105051508A/zh
Publication of WO2015121721A1 publication Critical patent/WO2015121721A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing

Definitions

  • Subject of the invention is a circuit for multipoint temperature measurement which applies in power electronic converters where there is a necessity for safety precaution against temperature increase of semiconductor junction above the acceptable level determined by element's producer.
  • the first circuit from Silictronix company publication is built using a differential multiplexer DG409 switching signals from four thermocouples, temperature measurements from the multiplexer output are compared with a reference value corresponding with a threshold temperature level.
  • Circuit solution from Popular Electronics publication utilizes a 4051 multiplexer and eight LM335 temperature sensors, output signal from the multiplexer is sent to ADC0831 a 8-bit analog-to-digital converter and then sent to a digital 8-bit bus.
  • From a patent publication GB934654 is known a circuit consisting of many branches (which are build using thermistors and resistors) that are biasing one or two transistors, what allows for detection of crossing threshold temperature in one of many measurement points.
  • Circuit according to the invention is equipped with a single voltage output with a positive and a negative pole, and consists of operational amplifiers, diodes and temperature sensors with voltage outputs.
  • Each temperature sensor has first and second leads between which the output voltage of the temperature sensor is measured.
  • the circuit is characterized by that it consists of at least two temperature sensors with first and second lead, of at least two operational amplifiers and of at least two diodes.
  • First voltage lead of each temperature sensor is connected with a non-inverting input of an operational amplifier assigned to that temperature sensor.
  • Output of each operational amplifier is connected with an anode from a diode assigned to this amplifier. Inverting inputs from all operational amplifiers are connected with each other, with all of diode cathodes and with circuit's voltage output positive pole, while circuit's voltage output negative pole and second leads of temperature sensors are connected to ground.
  • circuit according to the invention enables for measuring always the highest temperature from any number of measurement points temperatures. Circuit could be easily expanded depending of number of the measurement points.
  • Electronic circuit according to the invention is equipped with a single voltage output with positive 1 and negative 2 pole.
  • the circuit consists of at least two temperature sensors 3 and each of the sensor has a voltage output with a first 4 and second 5 leads, of at least two operational amplifiers 6 and at of least two diodes 7.
  • Voltage output's first lead 4 of each temperature sensor 3 is connected with a non-inverting input of a operational amplifier 6 assigned to that temperature sensor 3.
  • Output of each operational amplifier 6 is connected with an anode from a diode 7 assigned to this amplifier 6. Inverting inputs from all the operational amplifiers 6 are connected with each other, with all of the diode cathodes 7 and with circuit's voltage output positive pole 1 .
  • Circuit's voltage output negative pole 2 and second leads 5 of temperature sensors 3 are connected to ground.
  • Operational amplifiers 6 are working in non-inverting mode with gain equal one. Connection of inverting inputs of operation amplifiers 6 with cathodes from diodes 7 enables for compensation of voltage drop on diodes 7 semiconductor junctions.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
PCT/IB2014/067289 2014-02-14 2014-12-23 Circuit for multipoint temperature measurement, especially in power electronic converters WO2015121721A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201480003730.5A CN105051508A (zh) 2014-02-14 2014-12-23 用于多点温度测量的电路、尤其是在电力电子变流器中的用于多点温度测量的电路

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL407186A PL225350B1 (pl) 2014-02-14 2014-02-14 Układ do wielopunktowego pomiaru temperatury zwłaszcza w przekształtnikach energoelektronicznych
PLP.407186 2014-02-14

Publications (1)

Publication Number Publication Date
WO2015121721A1 true WO2015121721A1 (en) 2015-08-20

Family

ID=52462355

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/067289 WO2015121721A1 (en) 2014-02-14 2014-12-23 Circuit for multipoint temperature measurement, especially in power electronic converters

Country Status (3)

Country Link
CN (1) CN105051508A (pl)
PL (1) PL225350B1 (pl)
WO (1) WO2015121721A1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113465758A (zh) * 2021-06-21 2021-10-01 中国原子能科学研究院 测温装置和测温系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934654A (en) 1959-09-04 1963-08-21 Karl Gustaf Berg Electronic transistor-controlled device for measuring or control of temperatures
US4699519A (en) * 1985-04-08 1987-10-13 Performance Technology, Inc. Grain temperature monitor
PL190473B1 (pl) 1996-07-24 2005-12-30 Electrowatt Tech Innovat Corp Układ do pomiaru temperatury termistorów i sposóbobliczania temperatury termistora
US20110002358A1 (en) * 2009-07-02 2011-01-06 Renesas Technology America, Inc. Temperature Detection and Reporting System and Method in Power Driving and/or Consuming System
WO2013178324A2 (de) * 2012-06-01 2013-12-05 Sew-Eurodrive Gmbh & Co. Kg Modulares system, insbesondere modular aufgebauter energiespeicher

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5929344A (en) * 1997-07-28 1999-07-27 Micro Motion, Inc. Circuitry for reducing the number of conductors for multiple resistive sensors on a coriolis effect mass flowmeter
CN201014964Y (zh) * 2007-01-01 2008-01-30 周加超 体温测量光显示笔

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934654A (en) 1959-09-04 1963-08-21 Karl Gustaf Berg Electronic transistor-controlled device for measuring or control of temperatures
US4699519A (en) * 1985-04-08 1987-10-13 Performance Technology, Inc. Grain temperature monitor
PL190473B1 (pl) 1996-07-24 2005-12-30 Electrowatt Tech Innovat Corp Układ do pomiaru temperatury termistorów i sposóbobliczania temperatury termistora
US20110002358A1 (en) * 2009-07-02 2011-01-06 Renesas Technology America, Inc. Temperature Detection and Reporting System and Method in Power Driving and/or Consuming System
WO2013178324A2 (de) * 2012-06-01 2013-12-05 Sew-Eurodrive Gmbh & Co. Kg Modulares system, insbesondere modular aufgebauter energiespeicher

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Popular Electronics Journal", vol. 6/95, GERNSBACK PUBLICATIONS INC.
R. F. GRAF: "Encyclopedia of Electronic Circuits", vol. I, 1990, TAB BOOKS, pages: 63
R.F.GRAF; W.SHEETS: "Encyclopedia of Electronic Circuits", vol. VI, 1996, MCGRAW-HILL/TAB ELECTRONIX, pages: 634

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113465758A (zh) * 2021-06-21 2021-10-01 中国原子能科学研究院 测温装置和测温系统

Also Published As

Publication number Publication date
CN105051508A (zh) 2015-11-11
PL225350B1 (pl) 2017-03-31
PL407186A1 (pl) 2015-08-17

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