JPS5783193A - Method and device for limiting current of motor - Google Patents

Method and device for limiting current of motor

Info

Publication number
JPS5783193A
JPS5783193A JP55157055A JP15705580A JPS5783193A JP S5783193 A JPS5783193 A JP S5783193A JP 55157055 A JP55157055 A JP 55157055A JP 15705580 A JP15705580 A JP 15705580A JP S5783193 A JPS5783193 A JP S5783193A
Authority
JP
Japan
Prior art keywords
current limiting
task
motor
current
value
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.)
Granted
Application number
JP55157055A
Other languages
Japanese (ja)
Other versions
JPS6120235B2 (en
Inventor
Yasuyuki Sugiura
Shigeki Morinaga
Nobuyoshi Muto
Kenji Nanto
Tsunehiro Endo
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 JP55157055A priority Critical patent/JPS5783193A/en
Publication of JPS5783193A publication Critical patent/JPS5783193A/en
Publication of JPS6120235B2 publication Critical patent/JPS6120235B2/ja
Granted 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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/0077—Characterised by the use of a particular software algorithm

Abstract

PURPOSE:To prevent impression of overvoltage on an inverter by driving the inverter in phase when a motor current is over the mormal value. CONSTITUTION:A resistor 40 holding data of a current limiting value is installed, and the output of a D/A converter 41 converting this data into an analog value is compared with a motor current. When the motor current exceeds the limiting value, a current limiting interrupt is generated by an output of a comparator 42, and ain inverter is driven in phase. An interval interrupt is generated in every fixed period in order to release current limiting to work an interval task. Furthermore, a current limiting task and a stop task are carried out. The forme task is to put into the next ready-to-inter-rupt state after generation of current limiting interruption and the latter is a stop task to put the system into a state to cut off a motor in emergency with the number of current limiting interrupt generation specified.
JP55157055A 1980-11-10 1980-11-10 Method and device for limiting current of motor Granted JPS5783193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55157055A JPS5783193A (en) 1980-11-10 1980-11-10 Method and device for limiting current of motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55157055A JPS5783193A (en) 1980-11-10 1980-11-10 Method and device for limiting current of motor

Publications (2)

Publication Number Publication Date
JPS5783193A true JPS5783193A (en) 1982-05-24
JPS6120235B2 JPS6120235B2 (en) 1986-05-21

Family

ID=15641214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55157055A Granted JPS5783193A (en) 1980-11-10 1980-11-10 Method and device for limiting current of motor

Country Status (1)

Country Link
JP (1) JPS5783193A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826572A (en) * 1981-08-10 1983-02-17 Mitsubishi Electric Corp Controlling device
JPS5967877A (en) * 1982-10-08 1984-04-17 Fuji Electric Co Ltd Current limiting system for inverter
JPS6287683A (en) * 1985-10-14 1987-04-22 Kyokuto Kikai Seisakusho:Kk Control method of automatically operating pump
JPH02119530A (en) * 1988-10-27 1990-05-07 Sanken Electric Co Ltd Inverter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335945A (en) * 1989-07-03 1991-02-15 Matsushita Electric Ind Co Ltd Screw fastening machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826572A (en) * 1981-08-10 1983-02-17 Mitsubishi Electric Corp Controlling device
JPS5967877A (en) * 1982-10-08 1984-04-17 Fuji Electric Co Ltd Current limiting system for inverter
JPS6287683A (en) * 1985-10-14 1987-04-22 Kyokuto Kikai Seisakusho:Kk Control method of automatically operating pump
JPH02119530A (en) * 1988-10-27 1990-05-07 Sanken Electric Co Ltd Inverter

Also Published As

Publication number Publication date
JPS6120235B2 (en) 1986-05-21

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