JPS55129760A - Reversing detection circuit for motor - Google Patents

Reversing detection circuit for motor

Info

Publication number
JPS55129760A
JPS55129760A JP3682879A JP3682879A JPS55129760A JP S55129760 A JPS55129760 A JP S55129760A JP 3682879 A JP3682879 A JP 3682879A JP 3682879 A JP3682879 A JP 3682879A JP S55129760 A JPS55129760 A JP S55129760A
Authority
JP
Japan
Prior art keywords
motor
current
revolutions
electromotive force
counter electromotive
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
JP3682879A
Other languages
Japanese (ja)
Inventor
Tomomitsu Takano
Norihiko Ito
Takashi Kashiwazaki
Tadashi Kurosawa
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP3682879A priority Critical patent/JPS55129760A/en
Publication of JPS55129760A publication Critical patent/JPS55129760A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make unnecessary special space other than the main body with a simple constitution, by detecting the state of counter electromotive force of motor and performing reversing detection.
CONSTITUTION: When a given voltage is fed to the control input V1, specified drive current flows to the motor with the current control element 2, the motor 1 is driven and current flows also to the dummy resistance 4 with the current control element 2'. In this case, the current flowing to the motor circuit A is increased or decreased in proportion to the number of revolutions since the motor 1 causes counter electromotive force according to the number of revolutions. On the other hand, the current flowing to the dummy circuit B is a given value determined with the input V1, and the current value detected with the current detection elements 3, 3' has a difference, this difference corresponds to the counter electromotive force of the motor 1 and it is detected at the differential amplifier 5. Accordingly, by suitably setting the reference voltage Vs, the lowering in the number of revolutions of the motor 1, stop and reversing can be known by discriminating the output of the comparator 6.
COPYRIGHT: (C)1980,JPO&Japio
JP3682879A 1979-03-30 1979-03-30 Reversing detection circuit for motor Pending JPS55129760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3682879A JPS55129760A (en) 1979-03-30 1979-03-30 Reversing detection circuit for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3682879A JPS55129760A (en) 1979-03-30 1979-03-30 Reversing detection circuit for motor

Publications (1)

Publication Number Publication Date
JPS55129760A true JPS55129760A (en) 1980-10-07

Family

ID=12480598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3682879A Pending JPS55129760A (en) 1979-03-30 1979-03-30 Reversing detection circuit for motor

Country Status (1)

Country Link
JP (1) JPS55129760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6267462A (en) * 1985-09-20 1987-03-27 Sony Corp Rotation detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6267462A (en) * 1985-09-20 1987-03-27 Sony Corp Rotation detector

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