JPH03190569A - Inverter - Google Patents

Inverter

Info

Publication number
JPH03190569A
JPH03190569A JP1325565A JP32556589A JPH03190569A JP H03190569 A JPH03190569 A JP H03190569A JP 1325565 A JP1325565 A JP 1325565A JP 32556589 A JP32556589 A JP 32556589A JP H03190569 A JPH03190569 A JP H03190569A
Authority
JP
Japan
Prior art keywords
current
frequency
load circuit
circuit
current flowing
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
JP1325565A
Other languages
Japanese (ja)
Inventor
Fumisuke Tsukasa
Original Assignee
Anritsu Corp
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 Anritsu Corp filed Critical Anritsu Corp
Priority to JP1325565A priority Critical patent/JPH03190569A/en
Priority claimed from KR2019940700001U external-priority patent/KR940002271Y1/en
Priority claimed from US08/002,119 external-priority patent/US5359154A/en
Publication of JPH03190569A publication Critical patent/JPH03190569A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent remarkable increase of current flowing through a load circuit even upon lowering of source frequency by providing means for detecting the magnitude of AC current flowing through a load circuit and means for regulating driving current for the load circuit according to the magnitude of detected current.
CONSTITUTION: When a clock frequency Fc is preset at a considerably low frequency, current flowing through the coils 8, 9 of an induction motor 7 increases abruptly. The current increase is detected through a current detection circuit 60, and when the current value exceeds a predetermined level a current limit signal is provided to a speed set circuit 70 and the frequency of second clock signal CLK2 is switched from Fc/M to Fc. Consequently, PWM signals ϕ14 are outputted with width Wp times as wide as that of the second clock signal CLK2 which is switched to high frequency.
COPYRIGHT: (C)1991,JPO&Japio
JP1325565A 1989-12-15 1989-12-15 Inverter Pending JPH03190569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1325565A JPH03190569A (en) 1989-12-15 1989-12-15 Inverter

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP1325565A JPH03190569A (en) 1989-12-15 1989-12-15 Inverter
KR2019940700001U KR940002271Y1 (en) 1989-12-15 1990-12-15 Inverter-controlled apparatus for carrying and measuring articles
US08/002,119 US5359154A (en) 1989-12-15 1990-12-15 Conveyor apparatus having plural conveyors with equalized conveying speeds controlled by an inverter means
AU69023/91A AU631039B2 (en) 1989-12-15 1990-12-15 Inverter-controlled apparatus for carrying and measuring articles
KR1019910700581A KR920701796A (en) 1989-12-15 1990-12-15 Inverter control article conveying measuring device
DE69026711T DE69026711T2 (en) 1989-12-15 1990-12-15 INVERTER-CONTROLLED DEVICE FOR TRANSPORTING AND MEASURING OBJECTS
EP91900320A EP0458974B1 (en) 1989-12-15 1990-12-15 Inverter-controlled apparatus for carrying and measuring articles
PCT/JP1990/001640 WO1991009463A1 (en) 1989-12-15 1990-12-15 Inverter-controlled apparatus for carrying and measuring articles

Publications (1)

Publication Number Publication Date
JPH03190569A true JPH03190569A (en) 1991-08-20

Family

ID=18178311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1325565A Pending JPH03190569A (en) 1989-12-15 1989-12-15 Inverter

Country Status (1)

Country Link
JP (1) JPH03190569A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006197660A (en) * 2005-01-11 2006-07-27 Meidensha Corp Starting method and starter of uninterruptible power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006197660A (en) * 2005-01-11 2006-07-27 Meidensha Corp Starting method and starter of uninterruptible power supply
JP4670351B2 (en) * 2005-01-11 2011-04-13 株式会社明電舎 Uninterruptible power supply controller.

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