JPS5535261A - Wattmeter - Google Patents

Wattmeter

Info

Publication number
JPS5535261A
JPS5535261A JP10877178A JP10877178A JPS5535261A JP S5535261 A JPS5535261 A JP S5535261A JP 10877178 A JP10877178 A JP 10877178A JP 10877178 A JP10877178 A JP 10877178A JP S5535261 A JPS5535261 A JP S5535261A
Authority
JP
Japan
Prior art keywords
power
polarity
circuit
decision
momentary
Prior art date
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.)
Pending
Application number
JP10877178A
Other languages
Japanese (ja)
Inventor
Noboru Fukuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10877178A priority Critical patent/JPS5535261A/en
Publication of JPS5535261A publication Critical patent/JPS5535261A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain accurate power consumption even in case of variation in power ratio between a voltage and current as to momentary, by subtracting negative- polarity-directional power from an integrating count value by providing a polarity decision circuit and polarity inverter circuit.
CONSTITUTION: Signal polarity decision circuit 14 is provided to the output part of power detection circuit 11 and when a decision that momentary power P obtained by power detection circuit 11 is positive in polarity is made, change-over circuits 13a and 13b are changed over to supply it to frequency converter circuit 15 before counter 16 sums up and counts it. On the other hand, when a decision on a negative polarity is made, change-over circuits 13a and 13b are changed over to fixed terminal parts at the opposite sides. At this time, momentary power P of negative polarity inverter circuit 12 and outputted as positive power. This positive power P is supplied through frequency converter circuit 15 to the subtraction-side fixed terminal part of counter 16, where it is subtracted from the integrating count value. In this way, accurate power consumption can be found even in case of constant variation in power ratio between a voltage and current.
COPYRIGHT: (C)1980,JPO&Japio
JP10877178A 1978-09-05 1978-09-05 Wattmeter Pending JPS5535261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10877178A JPS5535261A (en) 1978-09-05 1978-09-05 Wattmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10877178A JPS5535261A (en) 1978-09-05 1978-09-05 Wattmeter

Publications (1)

Publication Number Publication Date
JPS5535261A true JPS5535261A (en) 1980-03-12

Family

ID=14493065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10877178A Pending JPS5535261A (en) 1978-09-05 1978-09-05 Wattmeter

Country Status (1)

Country Link
JP (1) JPS5535261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782059A (en) * 2018-12-24 2019-05-21 浙江恒业电子有限公司 A kind of method of the accurate reversed active energy of metering

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782059A (en) * 2018-12-24 2019-05-21 浙江恒业电子有限公司 A kind of method of the accurate reversed active energy of metering
CN109782059B (en) * 2018-12-24 2020-11-10 浙江恒业电子有限公司 Method for accurately measuring reverse active electric energy

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