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JPS56157295A - Speed control device for induction motor - Google Patents

Speed control device for induction motor

Info

Publication number
JPS56157295A
JPS56157295A JP6025880A JP6025880A JPS56157295A JP S56157295 A JPS56157295 A JP S56157295A JP 6025880 A JP6025880 A JP 6025880A JP 6025880 A JP6025880 A JP 6025880A JP S56157295 A JPS56157295 A JP S56157295A
Authority
JP
Japan
Prior art keywords
frequency
signal
induction motor
output
full
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
JP6025880A
Other languages
Japanese (ja)
Inventor
Wataru Mikami
Takuo Ono
Kazuo Nagatake
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 JP6025880A priority Critical patent/JPS56157295A/en
Publication of JPS56157295A publication Critical patent/JPS56157295A/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
    • 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
    • H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency

Landscapes

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

Abstract

PURPOSE:To maintaining the maximum torque of an induction motor approximately constantly in full frequency range by controlling the basic wave component of the output waveform of an inverter in accordance with a pattern signal and forming a relation in which the ratio of air gap inducing voltage to frequency becomes always constant. CONSTITUTION:A 3-phase induction motor is driven through the DC power source 2 of a 3-phase full-wave rectifier and a 3-phase bridge type switching circuit 4. The output of a speed setting unit 7 is converted via a frequency converter 8, which produces a signal S2 proportional to the desired output frequency, a pattern capable of obtaining basic wave component becoming always constant in the ratio of the air gap inducing voltage and the frequency is formed in a pattern generator 9 which has a memory and an address selector, and transistors Tr1, Tr2 are controlled by the synthesis of the output signal and the signal S2. Accordingly, it can control with constant E/f and can readily maintain the maximum torque constantly in full frequency range.
JP6025880A 1980-05-06 1980-05-06 Speed control device for induction motor Pending JPS56157295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6025880A JPS56157295A (en) 1980-05-06 1980-05-06 Speed control device for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6025880A JPS56157295A (en) 1980-05-06 1980-05-06 Speed control device for induction motor

Publications (1)

Publication Number Publication Date
JPS56157295A true JPS56157295A (en) 1981-12-04

Family

ID=13136956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6025880A Pending JPS56157295A (en) 1980-05-06 1980-05-06 Speed control device for induction motor

Country Status (1)

Country Link
JP (1) JPS56157295A (en)

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