JPS5517271A - Operating system for ac motor - Google Patents

Operating system for ac motor

Info

Publication number
JPS5517271A
JPS5517271A JP8997178A JP8997178A JPS5517271A JP S5517271 A JPS5517271 A JP S5517271A JP 8997178 A JP8997178 A JP 8997178A JP 8997178 A JP8997178 A JP 8997178A JP S5517271 A JPS5517271 A JP S5517271A
Authority
JP
Japan
Prior art keywords
speed
power source
induction motor
inverter
speed reference
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.)
Granted
Application number
JP8997178A
Other languages
Japanese (ja)
Other versions
JPS6120234B2 (en
Inventor
Suzuo Saitou
Kazuhiro Sugi
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 JP8997178A priority Critical patent/JPS5517271A/en
Publication of JPS5517271A publication Critical patent/JPS5517271A/en
Publication of JPS6120234B2 publication Critical patent/JPS6120234B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To recognize the start of operation by a variable frequency power source by detecting the electricity amount inherent to ac motors in starting the operation by the variable frequency power source.
CONSTITUTION: If a speed-down instruction is given during an operation of an induction motor 13 by a commercial power source 11, a switch 122 is opened so that the induction motor 13 is put to an idle operation and the speed drops. After a fixed period of time, an inverter operation starts at a frequency corresponding to a speed n0 set in a speed reference 312. A comparator circuit 8 recognizes that the induction motor 13 is put to the inverter operation with the fact that the output current of the inverter has exceeded an excitation current I0. Then the switch 321 is closed and the comparator circuit 38 serves to set the speed reference n to start the operation after being put to the speed reference 311 condition.
COPYRIGHT: (C)1980,JPO&Japio
JP8997178A 1978-07-25 1978-07-25 Operating system for ac motor Granted JPS5517271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8997178A JPS5517271A (en) 1978-07-25 1978-07-25 Operating system for ac motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8997178A JPS5517271A (en) 1978-07-25 1978-07-25 Operating system for ac motor

Publications (2)

Publication Number Publication Date
JPS5517271A true JPS5517271A (en) 1980-02-06
JPS6120234B2 JPS6120234B2 (en) 1986-05-21

Family

ID=13985559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8997178A Granted JPS5517271A (en) 1978-07-25 1978-07-25 Operating system for ac motor

Country Status (1)

Country Link
JP (1) JPS5517271A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61106092A (en) * 1984-10-29 1986-05-24 Sansha Electric Mfg Co Ltd Operating method for induction motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61106092A (en) * 1984-10-29 1986-05-24 Sansha Electric Mfg Co Ltd Operating method for induction motor

Also Published As

Publication number Publication date
JPS6120234B2 (en) 1986-05-21

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