JPS5475516A - Speed limit device of electric motor - Google Patents

Speed limit device of electric motor

Info

Publication number
JPS5475516A
JPS5475516A JP14278577A JP14278577A JPS5475516A JP S5475516 A JPS5475516 A JP S5475516A JP 14278577 A JP14278577 A JP 14278577A JP 14278577 A JP14278577 A JP 14278577A JP S5475516 A JPS5475516 A JP S5475516A
Authority
JP
Japan
Prior art keywords
counter
pulse generator
deviation
electric motor
counts
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
JP14278577A
Other languages
Japanese (ja)
Inventor
Tsutomu Omae
Toshihiko Matsuda
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 JP14278577A priority Critical patent/JPS5475516A/en
Publication of JPS5475516A publication Critical patent/JPS5475516A/en
Pending legal-status Critical Current

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Landscapes

  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE: To improve capacity of speed control, by counting output pulse row of revolving position pulse generator with two counters whose counting times are different, improving responsibility with one side counter and improving accuracy with another counter.
CONSTITUTION: Output of revolving position pulse generator 2 which is connected to an motor 1 is input to the first counter 7 which counts in each constant time T1 by reset pulse of pulse generator 8 and the second counter 6 which counts in each constant time T2 which is greater than T1, these outputs are take difference between velocity instruction through A-D converters 9, 10, are connected to switching circuit 15 which is switched in zero deviation detecting circuit 16, and operates the electric motor 1. Therefore, when deviation is big, sampling period whose speed feedback amount is small controls high speed response, and when deviation is small, sampling period is made to be longer, and high accuracy speed control can be done.
COPYRIGHT: (C)1979,JPO&Japio
JP14278577A 1977-11-30 1977-11-30 Speed limit device of electric motor Pending JPS5475516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14278577A JPS5475516A (en) 1977-11-30 1977-11-30 Speed limit device of electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14278577A JPS5475516A (en) 1977-11-30 1977-11-30 Speed limit device of electric motor

Publications (1)

Publication Number Publication Date
JPS5475516A true JPS5475516A (en) 1979-06-16

Family

ID=15323536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14278577A Pending JPS5475516A (en) 1977-11-30 1977-11-30 Speed limit device of electric motor

Country Status (1)

Country Link
JP (1) JPS5475516A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972891U (en) * 1982-11-05 1984-05-17 三菱電機株式会社 Electric motor speed control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972891U (en) * 1982-11-05 1984-05-17 三菱電機株式会社 Electric motor speed control device

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