PL423693A1 - System for measuring system with galvanic isolation - Google Patents

System for measuring system with galvanic isolation

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Publication number
PL423693A1
PL423693A1 PL423693A PL42369317A PL423693A1 PL 423693 A1 PL423693 A1 PL 423693A1 PL 423693 A PL423693 A PL 423693A PL 42369317 A PL42369317 A PL 42369317A PL 423693 A1 PL423693 A1 PL 423693A1
Authority
PL
Poland
Prior art keywords
resistor
terminal
output
ground
optocoupler
Prior art date
Application number
PL423693A
Other languages
Polish (pl)
Other versions
PL234634B1 (en
Inventor
Witold Kardyś
Original Assignee
Instytut Tele-I Radiotechniczny
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 Instytut Tele-I Radiotechniczny filed Critical Instytut Tele-I Radiotechniczny
Priority to PL423693A priority Critical patent/PL234634B1/en
Publication of PL423693A1 publication Critical patent/PL423693A1/en
Publication of PL234634B1 publication Critical patent/PL234634B1/en

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  • Measurement Of Current Or Voltage (AREA)
  • Amplifiers (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Wejście pomiarowe (WE) uniwersalnego układu pomiarowego z izolacją galwaniczną dołączone jest do rezystora pomiarowego (R3) oraz pierwszego zacisku dzielnika rezystancyjnego, a drugi zacisk rezystora (R3) dołączony jest do drenu tranzystora (T1), którego źródło dołączone jest do masy a bramka dołączona jest do rezystora wyłączającego (R8), bramki tranzystora (T2) oraz do jednego wyjścia fototranzystora transoptora przełączającego (U2), którego drugie wyjście dołączone jest do dodatniego izolowanego napięcia zasilania strony pomiarowej (VCC). Katoda diody świecącej transoptora (U2) dołączona jest do masy strony wyjściowej a anoda tej diody dołączona jest do sygnału wyboru trybu pracy (TRYB). Drugi zacisk rezystora (R8) i drugi zacisk rezystora (R2) dołączone są do masy. Wyjście dzielnika (R1, R2) dołączone jest do wejścia nieodwracającego wzmacniacza operacyjnego (W), którego wyjście dołączone jest do anody diody świecącej podwójnego transoptora liniowego (U1) za pośrednictwem rezystora (R4). Katoda tej diody świecącej dołączona jest do masy. Katoda pierwszej fotodiody transoptora (U1) dołączona jest do zacisku dodatniego izolowanego napięcia zasilania a anoda tej diody dołączona jest do rezystora (R5) oraz rezystora (R6). Drugi zacisk rezystora (R5) dołączony jest do masy a drugi i zacisk rezystora (R6) dołączony jest do wejścia nieodwracającego wzmacniacza operacyjnego (W) oraz do rezystora (R7), którego drugi zacisk dołączony jest do drenu tranzystora (T2), którego źródło dołączone jest do masy. Katoda drugiej fotodiody transoptora (U1) dołączona jest do napięcia zasilania strony wyjściowej układu (VCC2) a anoda tej fotodiody dołączona jest do masy strony wyjściowej układu poprzez rezystor wyjściowy (R9) oraz do wyjścia układu (WY).The measuring input (WE) of a universal measuring system with galvanic isolation is connected to the measuring resistor (R3) and the first terminal of the resistance divider, and the second terminal of the resistor (R3) is connected to the drain of the transistor (T1), whose source is connected to the ground and the gate connected it is to the switching resistor (R8), the gate of the transistor (T2) and to one output of the phototransistor switching optocoupler (U2), whose other output is connected to the positive isolated supply voltage of the measuring side (VCC). The cathode of the optocoupler diode (U2) is connected to the ground of the output side and the anode of this diode is connected to the signal of the mode selection (MODE). The second resistor terminal (R8) and the second resistor terminal (R2) are connected to ground. The divider output (R1, R2) is connected to the non-inverting input of the operational amplifier (W), whose output is connected to the anode of the diode of the double line optocoupler (U1) via a resistor (R4). The cathode of this LED is attached to the ground. The cathode of the first photodiode of the optocoupler (U1) is connected to the positive terminal of the isolated supply voltage and the anode of this diode is connected to the resistor (R5) and resistor (R6). The second terminal of the resistor (R5) is connected to ground and the second and the terminal of the resistor (R6) is connected to the input of the non-inverting operational amplifier (W) and to the resistor (R7), whose second terminal is connected to the drain of the transistor (T2), whose source is connected is to mass. The cathode of the second photodiode of the optocoupler (U1) is connected to the supply voltage of the output side of the system (VCC2) and the anode of this photodiode is connected to the ground of the output side of the system through the output resistor (R9) and to the output of the system (WY).

PL423693A 2017-12-04 2017-12-04 System for measuring system with galvanic isolation PL234634B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL423693A PL234634B1 (en) 2017-12-04 2017-12-04 System for measuring system with galvanic isolation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL423693A PL234634B1 (en) 2017-12-04 2017-12-04 System for measuring system with galvanic isolation

Publications (2)

Publication Number Publication Date
PL423693A1 true PL423693A1 (en) 2019-06-17
PL234634B1 PL234634B1 (en) 2020-03-31

Family

ID=66809649

Family Applications (1)

Application Number Title Priority Date Filing Date
PL423693A PL234634B1 (en) 2017-12-04 2017-12-04 System for measuring system with galvanic isolation

Country Status (1)

Country Link
PL (1) PL234634B1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513883A1 (en) * 1985-04-17 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Electronic switch having at least one optocoupler
US5517154A (en) * 1995-01-13 1996-05-14 Tektronix, Inc. Split-path linear isolation circuit apparatus and method
CN101923111A (en) * 2009-06-11 2010-12-22 北京中纺锐力机电有限公司 Isolation detection circuit of DC bus voltage
CN102305890A (en) * 2011-07-22 2012-01-04 中国电力科学研究院 Direct-current voltage detection method of submodule of flexible direct-current transmission system
CN102590589A (en) * 2012-02-23 2012-07-18 河海大学 4-20mA current transmitter circuit
CN102645600A (en) * 2012-05-03 2012-08-22 长沙威胜信息技术有限公司 Meter reading terminal hardware detection tool
CN203084068U (en) * 2012-12-19 2013-07-24 宁波伟吉电力科技有限公司 Analog voltage acquisition circuit with isolation function
CN206041965U (en) * 2016-09-26 2017-03-22 航天长峰朝阳电源有限公司 High -precision 4~20mA converts 10V's current -voltage conversion module to

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513883A1 (en) * 1985-04-17 1986-10-23 Siemens AG, 1000 Berlin und 8000 München Electronic switch having at least one optocoupler
US5517154A (en) * 1995-01-13 1996-05-14 Tektronix, Inc. Split-path linear isolation circuit apparatus and method
CN101923111A (en) * 2009-06-11 2010-12-22 北京中纺锐力机电有限公司 Isolation detection circuit of DC bus voltage
CN102305890A (en) * 2011-07-22 2012-01-04 中国电力科学研究院 Direct-current voltage detection method of submodule of flexible direct-current transmission system
CN102590589A (en) * 2012-02-23 2012-07-18 河海大学 4-20mA current transmitter circuit
CN102645600A (en) * 2012-05-03 2012-08-22 长沙威胜信息技术有限公司 Meter reading terminal hardware detection tool
CN203084068U (en) * 2012-12-19 2013-07-24 宁波伟吉电力科技有限公司 Analog voltage acquisition circuit with isolation function
CN206041965U (en) * 2016-09-26 2017-03-22 航天长峰朝阳电源有限公司 High -precision 4~20mA converts 10V's current -voltage conversion module to

Also Published As

Publication number Publication date
PL234634B1 (en) 2020-03-31

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