JPS56132190A - Driving device for induction motor - Google Patents

Driving device for induction motor

Info

Publication number
JPS56132190A
JPS56132190A JP3451380A JP3451380A JPS56132190A JP S56132190 A JPS56132190 A JP S56132190A JP 3451380 A JP3451380 A JP 3451380A JP 3451380 A JP3451380 A JP 3451380A JP S56132190 A JPS56132190 A JP S56132190A
Authority
JP
Japan
Prior art keywords
controlled
load
saw tooth
motor
circuit
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
JP3451380A
Other languages
Japanese (ja)
Inventor
Ayanori Ishibashi
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 JP3451380A priority Critical patent/JPS56132190A/en
Publication of JPS56132190A publication Critical patent/JPS56132190A/en
Pending 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To change effective input voltage in response to load and operate an induction motor at the maximum efficniency at all times by a method wherein voltage corresponding to load currents and saw tooth waves synchronizing with bus voltage are compared, and thyristors are controlled. CONSTITUTION:Three phase bus bars 10 are connected to an induction meotor 12 through two-way thyristors 11 every each phase. Load currents are detected by means of a current transformer 13, and transmitted to a comparator 15 through an absolute-value circuit 14 while the output of a saw tooth wave generating circuit 16 controlled by means of a phase detecting circuit 20 is also delivered to the comparator 15, comparison output is supplied to a control circuit 17 during the time when a level of the absolute-value circuit 14 is larger than a level of saw tooth waves, the gates of the thristors 11 are controlled and the motor 12 is operated. Thus, since applied voltage is controlled in response to the load currents and the motor can be operated at rated load at all times, necessary input is reduced, and the maximum efficiency can be obtained.
JP3451380A 1980-03-18 1980-03-18 Driving device for induction motor Pending JPS56132190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3451380A JPS56132190A (en) 1980-03-18 1980-03-18 Driving device for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3451380A JPS56132190A (en) 1980-03-18 1980-03-18 Driving device for induction motor

Publications (1)

Publication Number Publication Date
JPS56132190A true JPS56132190A (en) 1981-10-16

Family

ID=12416335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3451380A Pending JPS56132190A (en) 1980-03-18 1980-03-18 Driving device for induction motor

Country Status (1)

Country Link
JP (1) JPS56132190A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2568735A1 (en) * 1984-08-02 1986-02-07 Allegri Electricite Sa Device for powering a single-phase or multi-phase electric motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2568735A1 (en) * 1984-08-02 1986-02-07 Allegri Electricite Sa Device for powering a single-phase or multi-phase electric motor

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