JPS56117570A - Brushless direct current motor - Google Patents

Brushless direct current motor

Info

Publication number
JPS56117570A
JPS56117570A JP2096480A JP2096480A JPS56117570A JP S56117570 A JPS56117570 A JP S56117570A JP 2096480 A JP2096480 A JP 2096480A JP 2096480 A JP2096480 A JP 2096480A JP S56117570 A JPS56117570 A JP S56117570A
Authority
JP
Japan
Prior art keywords
theta
currents
cos
sin
proportional
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
JP2096480A
Other languages
Japanese (ja)
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 JP2096480A priority Critical patent/JPS56117570A/en
Publication of JPS56117570A publication Critical patent/JPS56117570A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors

Abstract

PURPOSE:To obtain fixed torque at all times by supplying currents being proportional to sin<2>theta and cos<2>theta to drive coils having two phases mounted where different at the electrical angles of 90 deg. to rotary magnets saturated and magnetized at N poles respectively. CONSTITUTION:The first drive coil consisting of winding blocks C1, C2 and the second drive coil consisting of winding blocks C3, C4 are mounted where different only by odd times as many as the electrical angles of 90 deg. mutually to rotary magnets 4, which are saturated and magnetized at N poles such as eight poles and the distribution of magnetic flux thereof is formed in a trapezoid wave shape. Currents being proportional to the wave-forms of sin<2>theta and cos<2>theta are made up by a fixed drive current forming means when an angle of revolution of a rotor is made theta, on the basis of the output of a reluctance element 8 detecting the sine wave-shaped magnetic flux of a positional magnet 6, and currents being proportional to the wave- forms of sin<2>theta and cos<2>theta are each supplied to the first and second drive coils while the direction of currents is changed over on the basis of the output of detecting elements 9, 10 installed where different at the electrical angles of 90 deg. mutually to the rotary magnets 4.
JP2096480A 1980-02-21 1980-02-21 Brushless direct current motor Pending JPS56117570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2096480A JPS56117570A (en) 1980-02-21 1980-02-21 Brushless direct current motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2096480A JPS56117570A (en) 1980-02-21 1980-02-21 Brushless direct current motor

Publications (1)

Publication Number Publication Date
JPS56117570A true JPS56117570A (en) 1981-09-16

Family

ID=12041850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2096480A Pending JPS56117570A (en) 1980-02-21 1980-02-21 Brushless direct current motor

Country Status (1)

Country Link
JP (1) JPS56117570A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60128476U (en) * 1983-12-15 1985-08-29 高橋　義照 Disc type brushless motor
JPS6168681U (en) * 1984-10-12 1986-05-10
KR100476714B1 (en) * 2000-10-11 2005-03-16 주식회사 만도 Rotor position detector of brushless motor for use the electric steering system of the vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60128476U (en) * 1983-12-15 1985-08-29 高橋　義照 Disc type brushless motor
JPS6168681U (en) * 1984-10-12 1986-05-10
KR100476714B1 (en) * 2000-10-11 2005-03-16 주식회사 만도 Rotor position detector of brushless motor for use the electric steering system of the vehicle

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