JPS57122685A - Speed control for induction motor - Google Patents

Speed control for induction motor

Info

Publication number
JPS57122685A
JPS57122685A JP56006699A JP669981A JPS57122685A JP S57122685 A JPS57122685 A JP S57122685A JP 56006699 A JP56006699 A JP 56006699A JP 669981 A JP669981 A JP 669981A JP S57122685 A JPS57122685 A JP S57122685A
Authority
JP
Japan
Prior art keywords
command value
current command
frequency
speed control
current
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
JP56006699A
Other languages
Japanese (ja)
Other versions
JPH0239162B2 (en
Inventor
Nobuo Watanabe
Hiroyuki Kitamura
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 JP56006699A priority Critical patent/JPH0239162B2/ja
Publication of JPS57122685A publication Critical patent/JPS57122685A/en
Publication of JPH0239162B2 publication Critical patent/JPH0239162B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/08—Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency

Abstract

PURPOSE:To stabilize the speed control while facilitating designing of characteristic by eliminating variations in the torque due to temperature changes of a secondary resistance in an induction motor. CONSTITUTION:A slip frequency computation circuit 17 is provided to calculate a slip frequency FS according to a current command value IC, the condition of a power P or regeneration B and a current deviation IU. A modulation factor computation section 18 is provided to calculate a modulation factor AL from an inverter frequency F and a line voltage EC. Output of a generator 1 is counted by a rotation frequency computation section 2 to determine a rotation frequency FR. An idling/sliding detector section 3 detects an idling and sliding WSD. A current command value computation section 5 calculates a current command value IC according to a command MC and a responsive load VL. Then, an operation unit 17 adds a constant item determined by the current command value IC and a transient item according to the current deviation IU and outputs the slip frequency FS.
JP56006699A 1981-01-20 1981-01-20 Expired - Lifetime JPH0239162B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56006699A JPH0239162B2 (en) 1981-01-20 1981-01-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56006699A JPH0239162B2 (en) 1981-01-20 1981-01-20

Publications (2)

Publication Number Publication Date
JPS57122685A true JPS57122685A (en) 1982-07-30
JPH0239162B2 JPH0239162B2 (en) 1990-09-04

Family

ID=11645572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56006699A Expired - Lifetime JPH0239162B2 (en) 1981-01-20 1981-01-20

Country Status (1)

Country Link
JP (1) JPH0239162B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51113910A (en) * 1975-03-31 1976-10-07 Toshiba Corp Control device for electric car
JPS5442712A (en) * 1977-09-09 1979-04-04 Hitachi Ltd Electric car controlling system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51113910A (en) * 1975-03-31 1976-10-07 Toshiba Corp Control device for electric car
JPS5442712A (en) * 1977-09-09 1979-04-04 Hitachi Ltd Electric car controlling system

Also Published As

Publication number Publication date
JPH0239162B2 (en) 1990-09-04

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