JPS5649692A - Variable voltage and variable frequency power supply - Google Patents

Variable voltage and variable frequency power supply

Info

Publication number
JPS5649692A
JPS5649692A JP12380479A JP12380479A JPS5649692A JP S5649692 A JPS5649692 A JP S5649692A JP 12380479 A JP12380479 A JP 12380479A JP 12380479 A JP12380479 A JP 12380479A JP S5649692 A JPS5649692 A JP S5649692A
Authority
JP
Japan
Prior art keywords
motor
speed command
limiter
current
command signal
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
JP12380479A
Other languages
Japanese (ja)
Inventor
Shinichi Ogawa
Minoru Numano
Toshio Kawaguchi
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 JP12380479A priority Critical patent/JPS5649692A/en
Publication of JPS5649692A publication Critical patent/JPS5649692A/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 prevent the overcurrent of a motor at a low speed, by varying the limitting value of a limiter circuit which limits the maximum allowable current of the motor with respect to a speed command signal. CONSTITUTION:The power supply 16 is connected to the motor 4 via a rectifer 1 and an inverter 3. The signal from a voltage detector 6 is supplied to an automatic voltage regulator 8 together with a speed command signal 5, and controls the gate of the rectifier 1 via the limiter 12 and an automatic current regulator 11. The speed command signal 5 controls the gate of the inverter 3 via a ring counter 14. At this time, the speed command signal is also supplied to a current limiter regulating circuit 15, and the limiter 12 is operated by the output therefrom. Therefore, the limiting value which limits the maximum allowable current of the motor 4 can be varied by the speed command, and the flowing of the current exceeding the value of the allowable current into the motor 4 at a low speed can be prevented.
JP12380479A 1979-09-28 1979-09-28 Variable voltage and variable frequency power supply Pending JPS5649692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12380479A JPS5649692A (en) 1979-09-28 1979-09-28 Variable voltage and variable frequency power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12380479A JPS5649692A (en) 1979-09-28 1979-09-28 Variable voltage and variable frequency power supply

Publications (1)

Publication Number Publication Date
JPS5649692A true JPS5649692A (en) 1981-05-06

Family

ID=14869723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12380479A Pending JPS5649692A (en) 1979-09-28 1979-09-28 Variable voltage and variable frequency power supply

Country Status (1)

Country Link
JP (1) JPS5649692A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103887A (en) * 1981-12-14 1983-06-21 Hitachi Ltd Overcurrent preventing circuit in motor driving circuit
JPS6237096A (en) * 1985-08-05 1987-02-18 Fuji Electric Co Ltd Protective device for overcurrent of inverter driving motor
JPS6237093A (en) * 1985-08-07 1987-02-18 Hitachi Ltd Control method of number of revolution of air conditioner
WO1991009463A1 (en) * 1989-12-15 1991-06-27 Anritsu Corporation Inverter-controlled apparatus for carrying and measuring articles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106816A (en) * 1978-02-10 1979-08-22 Toshiba Corp Control system for ac motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106816A (en) * 1978-02-10 1979-08-22 Toshiba Corp Control system for ac motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58103887A (en) * 1981-12-14 1983-06-21 Hitachi Ltd Overcurrent preventing circuit in motor driving circuit
JPH0452079B2 (en) * 1981-12-14 1992-08-20 Hitachi Ltd
JPS6237096A (en) * 1985-08-05 1987-02-18 Fuji Electric Co Ltd Protective device for overcurrent of inverter driving motor
JPS6237093A (en) * 1985-08-07 1987-02-18 Hitachi Ltd Control method of number of revolution of air conditioner
WO1991009463A1 (en) * 1989-12-15 1991-06-27 Anritsu Corporation Inverter-controlled apparatus for carrying and measuring articles
US5359154A (en) * 1989-12-15 1994-10-25 Anritsu Corporation Conveyor apparatus having plural conveyors with equalized conveying speeds controlled by an inverter means

Similar Documents

Publication Publication Date Title
JPS5534854A (en) Controlling method of secondary winding-exciting motor
GB1385239A (en) Current limiting control for an electric power system
JPS5649692A (en) Variable voltage and variable frequency power supply
JPS56107793A (en) Controlling method of inverter
JPS56129595A (en) Operation controlling device for motor
JPS55143841A (en) Oscillating circuit
JPS5549981A (en) Control protective system for separately excited inverter device
JPS5740398A (en) Constant-frequency constant-voltage generating device
JPS6420000A (en) Voltage regulator
JPS56153980A (en) Controlling circuit for pulse width modulation inverter
JPS56162997A (en) Motor controlling device by primary frequency control
JPS5695000A (en) Exciting device for super-conductive synchronous machine
JPS5749393A (en) Inverter controlling circuit for driving motor
JPS57162979A (en) Speed controller for motor
JPS56133999A (en) Inverter control circuit
JPS5725198A (en) Power supply unit
JPS57142182A (en) Driving method for motor
JPS5541147A (en) Thyristor leonard device with field controller
JPS5749390A (en) Operation controller for hysteresis motor
JPS57193991A (en) Controlling device of thyristor motor
JPS5771300A (en) Voltage regulatr for magnet type ac genertor
JPS566698A (en) Method of controlling scherbius system
JPS55131299A (en) Constant frequency/constant voltage generator
JPS57182224A (en) Method for inhibiting overcurrent of power supply
JPS5563591A (en) Revolution control device