JPS55100084A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS55100084A
JPS55100084A JP859479A JP859479A JPS55100084A JP S55100084 A JPS55100084 A JP S55100084A JP 859479 A JP859479 A JP 859479A JP 859479 A JP859479 A JP 859479A JP S55100084 A JPS55100084 A JP S55100084A
Authority
JP
Japan
Prior art keywords
signal
rom
information
counters
read out
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
JP859479A
Other languages
Japanese (ja)
Other versions
JPS6235355B2 (en
Inventor
Hiroyuki Yamauchi
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP859479A priority Critical patent/JPS55100084A/en
Publication of JPS55100084A publication Critical patent/JPS55100084A/en
Publication of JPS6235355B2 publication Critical patent/JPS6235355B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To reduce the torque ripple of the brushless motor by a method wherein a sine wave information stored in the memory is read out by means of the signal synchronized with the rotor revolution to form the stator coil current. CONSTITUTION:The signal FG which is obtained from the frequency generator 22 and is in response to the rotor revolution speed, is put into the counters 25, 26 as the pulse PFG through the amplifier 23 and the Schumit trigger circuit 24. In ROM 20, 21 a waveform information, which possesses the mutually 90 deg. different phases and are put in sampling based on the tooth number of the frequency generator 22, is stored. The counters 25, 26 designate the address of ROM 20, 21, and receive the signal CS4 obtained from the detected signal of the hole element 32 through the flip-flop circuits 34, 35 to read out the information of ROM 20, 21. The output information is provided to the coils 4, 5 by means of the D/A converters 27, 28, the amplifiers 29, 30 and the drive circuits 31, 32.
JP859479A 1979-01-26 1979-01-26 Brushless dc motor Granted JPS55100084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP859479A JPS55100084A (en) 1979-01-26 1979-01-26 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP859479A JPS55100084A (en) 1979-01-26 1979-01-26 Brushless dc motor

Publications (2)

Publication Number Publication Date
JPS55100084A true JPS55100084A (en) 1980-07-30
JPS6235355B2 JPS6235355B2 (en) 1987-07-31

Family

ID=11697299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP859479A Granted JPS55100084A (en) 1979-01-26 1979-01-26 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS55100084A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5854884A (en) * 1981-09-26 1983-03-31 Hitachi Ltd DC motor control method
JPS6082089A (en) * 1983-10-07 1985-05-10 Shibaura Eng Works Co Ltd Starting circuit of sm type ac servo motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555010A (en) * 1978-06-23 1980-01-14 Nippon Telegr & Teleph Corp <Ntt> Method of driving brushless motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555010A (en) * 1978-06-23 1980-01-14 Nippon Telegr & Teleph Corp <Ntt> Method of driving brushless motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5854884A (en) * 1981-09-26 1983-03-31 Hitachi Ltd DC motor control method
JPS6082089A (en) * 1983-10-07 1985-05-10 Shibaura Eng Works Co Ltd Starting circuit of sm type ac servo motor

Also Published As

Publication number Publication date
JPS6235355B2 (en) 1987-07-31

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