JPS61254057A - Flat motor - Google Patents

Flat motor

Info

Publication number
JPS61254057A
JPS61254057A JP9302285A JP9302285A JPS61254057A JP S61254057 A JPS61254057 A JP S61254057A JP 9302285 A JP9302285 A JP 9302285A JP 9302285 A JP9302285 A JP 9302285A JP S61254057 A JPS61254057 A JP S61254057A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
sections
printed board
rotational frequency
zigzag pattern
rotor 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.)
Pending
Application number
JP9302285A
Inventor
Jiro Kataoka
Original Assignee
Matsushita Electric Ind Co 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

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K29/00Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/14Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/46Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
    • G01P3/465Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage by using dynamo-electro tachometers or electric generator

Abstract

PURPOSE:To enable rotational frequency to be detected without increasing the outer diameter of a motor and without reducing torque, by providing the periphery of some section of a rotor magnet confronting a printed board for detecting the rotational frequency having zigzag pattern, with a rugged section. CONSTITUTION:A rotor magnet 14 is fixed on a shaft 4 via a rotor yoke 2. A stator is provided with a stator yoke 6 and stator coils 5. A printed board 9 for detecting rotational frequency has zigzag pattern, and the full periphery of a partial rotor magnet 14 confronting the printed board 9 is provided with convex sections and concave sections. The phase on the convex sections of the pole N sections is different from the phase on the convex sections of the pole S sections by an angle for one half a cycle on the zigzag pattern of the printed board 9.
JP9302285A 1985-04-30 1985-04-30 Flat motor Pending JPS61254057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9302285A JPS61254057A (en) 1985-04-30 1985-04-30 Flat motor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9302285A JPS61254057A (en) 1985-04-30 1985-04-30 Flat motor
KR860003221A KR900005759B1 (en) 1985-04-30 1986-04-26 Electrical motor with improved tachometer generator
EP19860303263 EP0200537A3 (en) 1985-04-30 1986-04-29 Electrical motor with improved tachometer generator

Publications (1)

Publication Number Publication Date
JPS61254057A true true JPS61254057A (en) 1986-11-11

Family

ID=14070858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9302285A Pending JPS61254057A (en) 1985-04-30 1985-04-30 Flat motor

Country Status (1)

Country Link
JP (1) JPS61254057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010093872A (en) * 2008-10-03 2010-04-22 Nidec Servo Corp Brushless dc motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010093872A (en) * 2008-10-03 2010-04-22 Nidec Servo Corp Brushless dc motor

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