FR2454722A1 - Permanent magnet brushless DC motor - uses light beam detector determining rotor angular position to control winding current - Google Patents

Permanent magnet brushless DC motor - uses light beam detector determining rotor angular position to control winding current

Info

Publication number
FR2454722A1
FR2454722A1 FR7909753A FR7909753A FR2454722A1 FR 2454722 A1 FR2454722 A1 FR 2454722A1 FR 7909753 A FR7909753 A FR 7909753A FR 7909753 A FR7909753 A FR 7909753A FR 2454722 A1 FR2454722 A1 FR 2454722A1
Authority
FR
France
Prior art keywords
angular position
winding current
motor
light beam
permanent magnet
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
FR7909753A
Other languages
French (fr)
Other versions
FR2454722B1 (en
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.)
Artus SAS
Original Assignee
Artus SAS
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 Artus SAS filed Critical Artus SAS
Priority to FR7909753A priority Critical patent/FR2454722A1/en
Publication of FR2454722A1 publication Critical patent/FR2454722A1/en
Application granted granted Critical
Publication of FR2454722B1 publication Critical patent/FR2454722B1/fr
Granted 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
    • H02K29/10—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using light effect devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushless Motors (AREA)

Abstract

The brushless DC motor uses a light source and detectors to determine the rotor angular position with respect to the stator. The detector positions are displaced by an angle of pi/n or pi-pi/n where n= the number of detectors, using a polarising element integral with the rotor and positioned between the detector and the light source. The detector then control, as a function of the light level being received, the winding current values. The light source may be remote using a fibre optic to bring it into the required position or a hemispherical reflector (25) directing the light to each detector (1) from a single source (20). The source and reflector are positioned in line with the rotor shaft (34), the polarising filters (26,27) being attached to the rotor end-face.
FR7909753A 1979-04-18 1979-04-18 Permanent magnet brushless DC motor - uses light beam detector determining rotor angular position to control winding current Granted FR2454722A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7909753A FR2454722A1 (en) 1979-04-18 1979-04-18 Permanent magnet brushless DC motor - uses light beam detector determining rotor angular position to control winding current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7909753A FR2454722A1 (en) 1979-04-18 1979-04-18 Permanent magnet brushless DC motor - uses light beam detector determining rotor angular position to control winding current

Publications (2)

Publication Number Publication Date
FR2454722A1 true FR2454722A1 (en) 1980-11-14
FR2454722B1 FR2454722B1 (en) 1982-05-21

Family

ID=9224432

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7909753A Granted FR2454722A1 (en) 1979-04-18 1979-04-18 Permanent magnet brushless DC motor - uses light beam detector determining rotor angular position to control winding current

Country Status (1)

Country Link
FR (1) FR2454722A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453526A1 (en) * 1979-04-05 1980-10-31 Sony Corp DIRECT CURRENT MOTOR, IN PARTICULAR FOR SOUND RECORDING AND / OR REPRODUCING APPARATUSES
US4631457A (en) * 1983-11-01 1986-12-23 Oki Electric Industry Co., Ltd. Method of leading a moving body driven by a direct current brushless motor to a starting position
DE3820903A1 (en) * 1988-06-21 1990-01-04 Heidelberger Druckmasch Ag ELECTRIC MACHINE
US5177393A (en) * 1991-09-24 1993-01-05 Gary Webber Optically commutated dc motor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370000A (en) * 1941-11-27 1945-02-20 Best Frank Ellison Master compass and inertia means
FR1349482A (en) * 1962-12-19 1964-01-17 Movado Montres Self-starting electronic motor
US3305713A (en) * 1964-01-02 1967-02-21 Hitachi Ltd Direct current brushless motor including pulse width modulation
US3667019A (en) * 1970-10-12 1972-05-30 Gen Motors Corp Control circuit for adjusting and regulating the speed of a brushless direct current motor responsive to voltages induced in the armature windings
FR2139367A5 (en) * 1971-05-10 1973-01-05 Otis Elevator Co
FR2149610A5 (en) * 1971-08-13 1973-03-30 Poubeau Pierre
DE2605759A1 (en) * 1975-04-04 1976-10-14 Tasc Engineering Corp Commutatorless DC motor with rotor position detectors - detectors are around rotor circumference and respond to flux from poles (NL061076)
GB1498409A (en) * 1975-05-22 1978-01-18 British Aircraft Corp Ltd Electrical apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370000A (en) * 1941-11-27 1945-02-20 Best Frank Ellison Master compass and inertia means
FR1349482A (en) * 1962-12-19 1964-01-17 Movado Montres Self-starting electronic motor
US3305713A (en) * 1964-01-02 1967-02-21 Hitachi Ltd Direct current brushless motor including pulse width modulation
US3667019A (en) * 1970-10-12 1972-05-30 Gen Motors Corp Control circuit for adjusting and regulating the speed of a brushless direct current motor responsive to voltages induced in the armature windings
FR2139367A5 (en) * 1971-05-10 1973-01-05 Otis Elevator Co
FR2149610A5 (en) * 1971-08-13 1973-03-30 Poubeau Pierre
DE2605759A1 (en) * 1975-04-04 1976-10-14 Tasc Engineering Corp Commutatorless DC motor with rotor position detectors - detectors are around rotor circumference and respond to flux from poles (NL061076)
GB1498409A (en) * 1975-05-22 1978-01-18 British Aircraft Corp Ltd Electrical apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453526A1 (en) * 1979-04-05 1980-10-31 Sony Corp DIRECT CURRENT MOTOR, IN PARTICULAR FOR SOUND RECORDING AND / OR REPRODUCING APPARATUSES
US4631457A (en) * 1983-11-01 1986-12-23 Oki Electric Industry Co., Ltd. Method of leading a moving body driven by a direct current brushless motor to a starting position
DE3820903A1 (en) * 1988-06-21 1990-01-04 Heidelberger Druckmasch Ag ELECTRIC MACHINE
US5177393A (en) * 1991-09-24 1993-01-05 Gary Webber Optically commutated dc motor

Also Published As

Publication number Publication date
FR2454722B1 (en) 1982-05-21

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Legal Events

Date Code Title Description
ST Notification of lapse