JPS55117492A - Operating method of three-phase induction motor - Google Patents

Operating method of three-phase induction motor

Info

Publication number
JPS55117492A
JPS55117492A JP2451279A JP2451279A JPS55117492A JP S55117492 A JPS55117492 A JP S55117492A JP 2451279 A JP2451279 A JP 2451279A JP 2451279 A JP2451279 A JP 2451279A JP S55117492 A JPS55117492 A JP S55117492A
Authority
JP
Japan
Prior art keywords
windings
motor
phase induction
induction motor
operating method
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
JP2451279A
Other languages
Japanese (ja)
Other versions
JPS6117236B2 (en
Inventor
Toshio Koike
Takuji Nishitani
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2451279A priority Critical patent/JPS55117492A/en
Publication of JPS55117492A publication Critical patent/JPS55117492A/en
Publication of JPS6117236B2 publication Critical patent/JPS6117236B2/ja
Granted legal-status Critical Current

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  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To operate a three-phase induction motor at a high performance both when the motor has a light load and when the motor has a heavy load, by switching in a suitable manner the first windings the number of which is equal to that of pair of poles per phase provided electrically at 120 deg. intervals, and the second windings provided among the first windings. CONSTITUTION:The second windings U2, V2, W2 of a three-phase induction motor are DELTA connected, and the first windings U1, V1, W1 are connected between nodes (d), (e), (f) of the second windings and power sources R, S, T. Means K1, K2, K3 for use in connecting nodes (a), (f); (c), (e); (b), (d); respectively, are provided. These connecting means are opened when the motor has a light load, and closed when the motor has a heavy load. The windings U1, W2; W1, V2; V1, U2; are connected in parallel so that the windings as a whole are in double DELTA connection with respect to the power sources R, S, T.
JP2451279A 1979-03-05 1979-03-05 Operating method of three-phase induction motor Granted JPS55117492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2451279A JPS55117492A (en) 1979-03-05 1979-03-05 Operating method of three-phase induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2451279A JPS55117492A (en) 1979-03-05 1979-03-05 Operating method of three-phase induction motor

Publications (2)

Publication Number Publication Date
JPS55117492A true JPS55117492A (en) 1980-09-09
JPS6117236B2 JPS6117236B2 (en) 1986-05-06

Family

ID=12140217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2451279A Granted JPS55117492A (en) 1979-03-05 1979-03-05 Operating method of three-phase induction motor

Country Status (1)

Country Link
JP (1) JPS55117492A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0346488A1 (en) * 1987-12-19 1989-12-20 Fanuc Ltd. Device for driving and controlling the spindle of a machine tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0346488A1 (en) * 1987-12-19 1989-12-20 Fanuc Ltd. Device for driving and controlling the spindle of a machine tool

Also Published As

Publication number Publication date
JPS6117236B2 (en) 1986-05-06

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