JPS5755790A - Speed controller of induction motor - Google Patents

Speed controller of induction motor

Info

Publication number
JPS5755790A
JPS5755790A JP55130736A JP13073680A JPS5755790A JP S5755790 A JPS5755790 A JP S5755790A JP 55130736 A JP55130736 A JP 55130736A JP 13073680 A JP13073680 A JP 13073680A JP S5755790 A JPS5755790 A JP S5755790A
Authority
JP
Japan
Prior art keywords
source
phase
transformer
induction motor
switching
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
JP55130736A
Other languages
Japanese (ja)
Inventor
Yoshiharu Nakazawa
Makoto Fukuyama
Fujio Ishikawa
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.)
Toyo Denki Seizo KK
Toyo Electric Manufacturing Ltd
Original Assignee
Toyo Denki Seizo KK
Toyo Electric Manufacturing 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 Toyo Denki Seizo KK, Toyo Electric Manufacturing Ltd filed Critical Toyo Denki Seizo KK
Priority to JP55130736A priority Critical patent/JPS5755790A/en
Publication of JPS5755790A publication Critical patent/JPS5755790A/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
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Landscapes

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

Abstract

PURPOSE:To obtain a fine multi-step frequency generating function, by a method wherein a six-phase transformer and two-way control rectifying elements which are connected to the corresponding phases of the transformer are inserted between a source and a three-phase induction motor and each element is switch-controlled by a specified method. CONSTITUTION:A transformer 2 which converts three-phase into six-phase and two-way control rectifying elements THU-THW, THU1-THW1 which have prescribed relations to the corresponding phase windings of the transformer 2 are connected between a source 1 and a three-phase induction motor 4. Switching is made between the elements such as THU and THU1 at every period of no half-waves of the source. The switching is repeated K-1 times and at the K-th time the switching is made at the period of n0+ or -1 half-waves of the source and an output is generated so that the frequency of 1/(n0+ or -1/K) times of the source frequency is obtained. Thus the fine multi-step frequency generating function is obtained, so that the multi-step speed driving or the continuous variable speed driving at the speed less than a half of the synchronous speed can be made possible.
JP55130736A 1980-09-22 1980-09-22 Speed controller of induction motor Pending JPS5755790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55130736A JPS5755790A (en) 1980-09-22 1980-09-22 Speed controller of induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55130736A JPS5755790A (en) 1980-09-22 1980-09-22 Speed controller of induction motor

Publications (1)

Publication Number Publication Date
JPS5755790A true JPS5755790A (en) 1982-04-02

Family

ID=15041392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55130736A Pending JPS5755790A (en) 1980-09-22 1980-09-22 Speed controller of induction motor

Country Status (1)

Country Link
JP (1) JPS5755790A (en)

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