JPS5532471A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS5532471A
JPS5532471A JP10512478A JP10512478A JPS5532471A JP S5532471 A JPS5532471 A JP S5532471A JP 10512478 A JP10512478 A JP 10512478A JP 10512478 A JP10512478 A JP 10512478A JP S5532471 A JPS5532471 A JP S5532471A
Authority
JP
Japan
Prior art keywords
pulse
hall elements
voltage
switches
voltages
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
JP10512478A
Other languages
Japanese (ja)
Other versions
JPS6130516B2 (en
Inventor
Isao Kobayashi
Mitsuru Hanajima
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 JP10512478A priority Critical patent/JPS5532471A/en
Publication of JPS5532471A publication Critical patent/JPS5532471A/en
Publication of JPS6130516B2 publication Critical patent/JPS6130516B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To make the peak value of a pulse-like current higher than that of a direct current, by supplying the pulse-like current to Hall elements for detecting the position of a rotor. CONSTITUTION:A pulse signal is applied at a constant period from the oscillator 21 to the switch circuit 22. A pulse-like voltage appears on the connection point P1 of the switch circuit 22 with a terminal 20 to which a DC voltage EB is applied. The pulse-like voltage is amplified by an amplifier 23 and then supplied to the Hall elements 24, 25. A magnetic field of sine wave is applied from a rotor magnet to the Hall elements. Voltages proportional to the intensity of the magnetic field are prouduced by the Hall elements while a pulse-like current flows. The voltages are amplified by amplifiers 26, 27 and then supplied to the switches 34, 35. The signal of the oscillater 21 is applied to the switches 34, 35 through a sampling pulse generator 33. When the switches are closed, sampling voltage are held by capacitors 36, 37. The held voltages are applied to stator coils 4, 5 through operational amplifiers 38, 39 and transistors 40 43.
JP10512478A 1978-08-29 1978-08-29 Brushless dc motor Granted JPS5532471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10512478A JPS5532471A (en) 1978-08-29 1978-08-29 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10512478A JPS5532471A (en) 1978-08-29 1978-08-29 Brushless dc motor

Publications (2)

Publication Number Publication Date
JPS5532471A true JPS5532471A (en) 1980-03-07
JPS6130516B2 JPS6130516B2 (en) 1986-07-14

Family

ID=14399034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10512478A Granted JPS5532471A (en) 1978-08-29 1978-08-29 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS5532471A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549965A (en) * 1978-10-04 1980-04-11 Sony Corp Brushless dc motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5549965A (en) * 1978-10-04 1980-04-11 Sony Corp Brushless dc motor

Also Published As

Publication number Publication date
JPS6130516B2 (en) 1986-07-14

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