JPS5662060A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS5662060A
JPS5662060A JP13645779A JP13645779A JPS5662060A JP S5662060 A JPS5662060 A JP S5662060A JP 13645779 A JP13645779 A JP 13645779A JP 13645779 A JP13645779 A JP 13645779A JP S5662060 A JPS5662060 A JP S5662060A
Authority
JP
Japan
Prior art keywords
magnetic substance
magnetic flux
hall elements
disc
magnetic
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
JP13645779A
Other languages
Japanese (ja)
Inventor
Takanori Shibata
Hidekazu Otsu
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13645779A priority Critical patent/JPS5662060A/en
Publication of JPS5662060A publication Critical patent/JPS5662060A/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

Landscapes

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

Abstract

PURPOSE:To improve the accuracy in position detection of the rotor on the subject brushless DC motor by sharply improving the magnetic flux which acts on a Hall element using a method wherein a method a magnetic substance piece is placed between the stator substrate and the Hall element of the above motor. CONSTITUTION:Two flat type coils 7a and 7b are provided on the stator substrate 2 through a medium of insulating sheets 8a and 8b (not shown in the diagram) and the Hall elements 9a and 9b are provided through a medium of magnetic substance pieces 10a and 10b. These magnetic substance pieces are used for increasing the magnetic flux which acts on the Hall elements 9a and 9b by concentrating at these magnetic substance pieces the magnetic flux coming from a disc-shaped magnet 13, the size of which is to be almost same as the Hall elements 9a and 9b and the thickness is to be made in such way that the surface of the flat coils 7a and 7b and the Hall elements 9a and 9b will be made level. Also, a groove 22 is formed on each neutral zone between the poles of the disc-shaped magnet 13 and an increase of an effective magnetic flux can be accomplished by placing a magnetic substance disc 23 on the reverse side of the groove 22.
JP13645779A 1979-10-24 1979-10-24 Brushless dc motor Pending JPS5662060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13645779A JPS5662060A (en) 1979-10-24 1979-10-24 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13645779A JPS5662060A (en) 1979-10-24 1979-10-24 Brushless dc motor

Publications (1)

Publication Number Publication Date
JPS5662060A true JPS5662060A (en) 1981-05-27

Family

ID=15175553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13645779A Pending JPS5662060A (en) 1979-10-24 1979-10-24 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS5662060A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5866871U (en) * 1981-10-28 1983-05-07 高橋　義照 Disc type semiconductor motor
JPS59122351A (en) * 1982-12-27 1984-07-14 Takahashi Yoshiteru Superposition type brushless motor without superposing armature coil group
JPS59209036A (en) * 1983-05-11 1984-11-27 Toshiba Corp Motor
JPS6024181U (en) * 1983-07-21 1985-02-19 アルプス電気株式会社 rotor for motor
US4504751A (en) * 1982-12-10 1985-03-12 Micronel Ag Fan with electronically commutated direct-current motor
US4547714A (en) * 1978-08-11 1985-10-15 Papst-Motoren Gmbh & Co. Kg Low magnetic leakage flux brushless pulse controlled d-c motor
JPS61134680U (en) * 1986-01-22 1986-08-22
US4626752A (en) * 1985-03-04 1986-12-02 Fujisaki Kyonori Electric motor having Hall generators and control circuit
JPS61199184U (en) * 1985-05-30 1986-12-12
JPS6344677U (en) * 1986-09-06 1988-03-25
JPS6345103U (en) * 1986-09-09 1988-03-26
US5184734A (en) * 1990-02-07 1993-02-09 Tokyo Electric Co., Ltd. Sheet delivering mechanism
EP0698958A1 (en) * 1994-07-29 1996-02-28 E.I. Du Pont De Nemours And Company DC electric motor having a flux concentrating member thereon

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547714A (en) * 1978-08-11 1985-10-15 Papst-Motoren Gmbh & Co. Kg Low magnetic leakage flux brushless pulse controlled d-c motor
JPS5866871U (en) * 1981-10-28 1983-05-07 高橋　義照 Disc type semiconductor motor
US4504751A (en) * 1982-12-10 1985-03-12 Micronel Ag Fan with electronically commutated direct-current motor
JPS59122351A (en) * 1982-12-27 1984-07-14 Takahashi Yoshiteru Superposition type brushless motor without superposing armature coil group
JPS59209036A (en) * 1983-05-11 1984-11-27 Toshiba Corp Motor
JPS6024181U (en) * 1983-07-21 1985-02-19 アルプス電気株式会社 rotor for motor
US4626752A (en) * 1985-03-04 1986-12-02 Fujisaki Kyonori Electric motor having Hall generators and control circuit
JPS61199184U (en) * 1985-05-30 1986-12-12
JPS61134680U (en) * 1986-01-22 1986-08-22
JPS6344677U (en) * 1986-09-06 1988-03-25
JPS6345103U (en) * 1986-09-09 1988-03-26
JPH052969Y2 (en) * 1986-09-09 1993-01-25
US5184734A (en) * 1990-02-07 1993-02-09 Tokyo Electric Co., Ltd. Sheet delivering mechanism
EP0698958A1 (en) * 1994-07-29 1996-02-28 E.I. Du Pont De Nemours And Company DC electric motor having a flux concentrating member thereon
US5600192A (en) * 1994-07-29 1997-02-04 Sorvall Products, L.P. DC electric motor having a flux concentrating member thereon

Similar Documents

Publication Publication Date Title
JPS5662060A (en) Brushless dc motor
YU176187A (en) Machine with complete change of flux orientation and changable magnetic resistance
DE3680674D1 (en) DRIVE AND POSITIONING SYSTEM.
DK0403317T3 (en) Magnetization circuit for an electric motor stator and stator with such circuit
JPS5588559A (en) Magnetic circuit construction for magnetic deriver
JPS5229917A (en) Detection circuit for position of rotor in commutatorless motor
JPS55106074A (en) Moving-coil type linear motor
JPS57145559A (en) Brushless motor
JPS54113018A (en) Dc brushless motor
GB1420030A (en) Selectively reversible step motor
JPS57101558A (en) Structure of magnetic float type linear motor
JPS5571166A (en) Motor
JPS57116574A (en) 3-phase brushless motor
JPS5785564A (en) Dc brushless motor
JPS5210714A (en) Thin film magnetic head
JPS5691670A (en) Brushless motor
JPS5389912A (en) Dc brushless motor
JPS5722367A (en) Commutatorless motor
FR2403675A1 (en) DC electric motor with permanent stator magnets - inducing current in coils carried on thin disc rotor
JPS6431014A (en) Tuned dry gyro equipped with orthogonality compensating torquer
JPS562566A (en) Detecting method for rotation of motor
JPS55114175A (en) Motor
JPS5797357A (en) Brushless dc motor
JPS52122811A (en) Rotor for permanent magnet type rotary machine
JPS57166872A (en) Axially flat type brushless motor