JPS5471317A - Inverter induction motor speed controller - Google Patents

Inverter induction motor speed controller

Info

Publication number
JPS5471317A
JPS5471317A JP13807977A JP13807977A JPS5471317A JP S5471317 A JPS5471317 A JP S5471317A JP 13807977 A JP13807977 A JP 13807977A JP 13807977 A JP13807977 A JP 13807977A JP S5471317 A JPS5471317 A JP S5471317A
Authority
JP
Japan
Prior art keywords
current
curve
output
motor torque
frequency
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
JP13807977A
Other languages
Japanese (ja)
Inventor
Hiroo Tomita
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP13807977A priority Critical patent/JPS5471317A/en
Publication of JPS5471317A publication Critical patent/JPS5471317A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve operation efficiency by automatically reducing the frequency command of an inverter and increasing motor torque when a current limit function operates due to overload and automatically retunning to the original frequency when current limit is cancelled.
CONSTITUTION: When an induction motor 4 is overloaded, a current detector 5 operates and a current limiter 14 consisting of a proportional integation amplifier is actuated. These functions decrease the frequency command arriving at a single integrator 9 from an output frequency setting device 7. Accordingly, motor torque overcomes load torque and is accelerated. Since load is reduced and the actual current valve is lower than the curvent limit value, the output of the current limiter 14 increases and the frequency command which is the output of an adder 8 also increases. Motor torque moves through Curve (c) → Curve (b) → Curve (a) and automatically returns to rated speed.
COPYRIGHT: (C)1979,JPO&Japio
JP13807977A 1977-11-16 1977-11-16 Inverter induction motor speed controller Pending JPS5471317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13807977A JPS5471317A (en) 1977-11-16 1977-11-16 Inverter induction motor speed controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13807977A JPS5471317A (en) 1977-11-16 1977-11-16 Inverter induction motor speed controller

Publications (1)

Publication Number Publication Date
JPS5471317A true JPS5471317A (en) 1979-06-07

Family

ID=15213457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13807977A Pending JPS5471317A (en) 1977-11-16 1977-11-16 Inverter induction motor speed controller

Country Status (1)

Country Link
JP (1) JPS5471317A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564338U (en) * 1979-06-23 1981-01-16
JPS5899297A (en) * 1981-12-09 1983-06-13 Fuji Electric Co Ltd System for detecting shift of induction motor to unstable region by inverter driving control
JPS60215010A (en) * 1984-02-23 1985-10-28 ビ−アイピ−　ケミカルズ　リミテツド Manufacture of resin

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112116A (en) * 1973-02-28 1974-10-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112116A (en) * 1973-02-28 1974-10-25

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564338U (en) * 1979-06-23 1981-01-16
JPS5899297A (en) * 1981-12-09 1983-06-13 Fuji Electric Co Ltd System for detecting shift of induction motor to unstable region by inverter driving control
JPS60215010A (en) * 1984-02-23 1985-10-28 ビ−アイピ−　ケミカルズ　リミテツド Manufacture of resin
JPH0586805B2 (en) * 1984-02-23 1993-12-14 Bip Chemicals Ltd

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