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JPS54129420A - Driving circuit for blushless dc motor - Google Patents

Driving circuit for blushless dc motor

Info

Publication number
JPS54129420A
JPS54129420A JP3828678A JP3828678A JPS54129420A JP S54129420 A JPS54129420 A JP S54129420A JP 3828678 A JP3828678 A JP 3828678A JP 3828678 A JP3828678 A JP 3828678A JP S54129420 A JPS54129420 A JP S54129420A
Authority
JP
Japan
Prior art keywords
output
signal
comparator
condenser
resistor
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
JP3828678A
Other languages
Japanese (ja)
Inventor
Chihiro Kitazawa
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.)
Seiko Epson Corp
Suwa Seikosha KK
Epson Corp
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Epson 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 Seiko Epson Corp, Suwa Seikosha KK, Epson Corp filed Critical Seiko Epson Corp
Priority to JP3828678A priority Critical patent/JPS54129420A/en
Publication of JPS54129420A publication Critical patent/JPS54129420A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE: To perform the speed control of motor without the use of tachometer generator by using Hall device for generating motor driving timing signal as speed detection device.
CONSTITUTION: According to magnetic flux which varies with the rotation of rotor, an antiphase output voltage generates in the output terminals 56a and 56b of the Hall device 45. The comparator 57 compares the output to form a square wave of the deviation signal 57a which is in turn inversed at the circuit consisting of the resistors 58 and 59, the condenser 60, the transistor 61, and the resistor 62. The inversed signal is differentiated at the circuit consisting of the condenser 43 and the resistor 66 and then converted into a serration wave at the circuit consisting of the diode 67, the condenser 69, and the resistor 70. The serration wave output and the collector 61 output of the transistor 61 are combined compositely and then put in the comparator 73. At the comparator 73, the reference voltage 71a and the composite signal are compared, and according to the drviation, driving coil is operated by the output signal 73a as high level.
COPYRIGHT: (C)1979,JPO&Japio
JP3828678A 1978-03-31 1978-03-31 Driving circuit for blushless dc motor Pending JPS54129420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3828678A JPS54129420A (en) 1978-03-31 1978-03-31 Driving circuit for blushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3828678A JPS54129420A (en) 1978-03-31 1978-03-31 Driving circuit for blushless dc motor

Publications (1)

Publication Number Publication Date
JPS54129420A true JPS54129420A (en) 1979-10-06

Family

ID=12521057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3828678A Pending JPS54129420A (en) 1978-03-31 1978-03-31 Driving circuit for blushless dc motor

Country Status (1)

Country Link
JP (1) JPS54129420A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0488605U (en) * 1990-12-18 1992-07-31
JPH04347593A (en) * 1991-05-23 1992-12-02 Rohm Co Ltd Motor driven and fan motor drive control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0488605U (en) * 1990-12-18 1992-07-31
JPH04347593A (en) * 1991-05-23 1992-12-02 Rohm Co Ltd Motor driven and fan motor drive control system

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