JPS54115164A - Electromagnetic flowmeter - Google Patents

Electromagnetic flowmeter

Info

Publication number
JPS54115164A
JPS54115164A JP2229278A JP2229278A JPS54115164A JP S54115164 A JPS54115164 A JP S54115164A JP 2229278 A JP2229278 A JP 2229278A JP 2229278 A JP2229278 A JP 2229278A JP S54115164 A JPS54115164 A JP S54115164A
Authority
JP
Japan
Prior art keywords
period
exciting current
exciting
coil
τoff
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
JP2229278A
Other languages
Japanese (ja)
Inventor
Yoshio Kurita
Eiji Ogita
Masahiro Ogawa
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP2229278A priority Critical patent/JPS54115164A/en
Publication of JPS54115164A publication Critical patent/JPS54115164A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To eliminate the need for remedy against evolution of heat such as installation of a large heat sink or the like by providing the period of not flowing exciting current to an exciting coil.
CONSTITUTION: The exciting current Iw having ON period τON and OFF period τOFF is supplied to an exciting coil 5. When changed over with semiconductor switches 3, 3, the exciting current Iw becomes of a steady value after accompanying a delay at the rise portion at the time constant by the inductance L of the coil 5 and a resistance R. Here, the OFF period when no exciting current is flowed is provided and therefore if, for example, the OFF period τOFF is selected thrice the ON period τON, the mean value of the exciting current becomes 1/4 that of conventional flowmeters having no OFF period, thus the power consumption as a flowmeter decreases and in addition, the joule heat evolved in the switch element and exciting coil 5 decreases accordingly.
COPYRIGHT: (C)1979,JPO&Japio
JP2229278A 1978-02-28 1978-02-28 Electromagnetic flowmeter Pending JPS54115164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2229278A JPS54115164A (en) 1978-02-28 1978-02-28 Electromagnetic flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2229278A JPS54115164A (en) 1978-02-28 1978-02-28 Electromagnetic flowmeter

Publications (1)

Publication Number Publication Date
JPS54115164A true JPS54115164A (en) 1979-09-07

Family

ID=12078664

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2229278A Pending JPS54115164A (en) 1978-02-28 1978-02-28 Electromagnetic flowmeter

Country Status (1)

Country Link
JP (1) JPS54115164A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561311A (en) * 1981-12-11 1985-12-31 The Babcock & Wilcox Company Bridge excitation for sensor used on a vortex shedding flow meter
US4766770A (en) * 1984-03-30 1988-08-30 Fischer & Porter Company Low duty cycle electromagnetic flowmeter
JP2001522457A (en) * 1997-04-25 2001-11-13 エービービー メータリング リミテッド Electromagnetic flow meter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974565A (en) * 1972-11-16 1974-07-18
JPS5177355A (en) * 1974-12-27 1976-07-05 Tokyo Shibaura Electric Co DENJIRYURYOKEI

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4974565A (en) * 1972-11-16 1974-07-18
JPS5177355A (en) * 1974-12-27 1976-07-05 Tokyo Shibaura Electric Co DENJIRYURYOKEI

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561311A (en) * 1981-12-11 1985-12-31 The Babcock & Wilcox Company Bridge excitation for sensor used on a vortex shedding flow meter
US4766770A (en) * 1984-03-30 1988-08-30 Fischer & Porter Company Low duty cycle electromagnetic flowmeter
JP2001522457A (en) * 1997-04-25 2001-11-13 エービービー メータリング リミテッド Electromagnetic flow meter

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