JPS5796264A - Speed detector for commutator-less motor - Google Patents

Speed detector for commutator-less motor

Info

Publication number
JPS5796264A
JPS5796264A JP55172856A JP17285680A JPS5796264A JP S5796264 A JPS5796264 A JP S5796264A JP 55172856 A JP55172856 A JP 55172856A JP 17285680 A JP17285680 A JP 17285680A JP S5796264 A JPS5796264 A JP S5796264A
Authority
JP
Japan
Prior art keywords
spike voltage
exciting
commutator
phase
speed
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
JP55172856A
Other languages
Japanese (ja)
Other versions
JPS6361625B2 (en
Inventor
Takafumi Akeda
Hiroshi Okamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55172856A priority Critical patent/JPS5796264A/en
Publication of JPS5796264A publication Critical patent/JPS5796264A/en
Publication of JPS6361625B2 publication Critical patent/JPS6361625B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To eliminate noise produced by a large commutation of exciting current in a machine in which the period information of signal induced in the exciting coil of a commutator-less motor is used as a speed signal, by processing the speed signal by a position signal. CONSTITUTION:A commutator-less motor has exciting coils Ma to Mc which are successively energized by electric current supplied from transistors 8 to 10 adapted to be successively turned on by signals d to f derived from a position signal generator 29. A rotor constituted by a permanent magnet is rotated as a result of the energization of the exciting coils Ma to Mc. In each exciting coil, induced are a first spike voltage generated by mutual induction when the exciting current is commutated in another phase and a second spike voltage generated when the current of its own phase is cut. These spike voltage are shaped by circuits 11 to 13 and flip-flops 14 to 16 are set by the first spike voltage. The flip-flops are then reset by the position signal e from the phase next to the first-mentioned phase which produces an output h. Therefore, no second spike voltage appears in the output i. Then, a speed pulse k is produced by monostable multivibrators 17 to 19. The speed pulse is converted into voltage through an f-v conversion by a circuit 22, and a speed control is effected by a circuit 23.
JP55172856A 1980-12-08 1980-12-08 Speed detector for commutator-less motor Granted JPS5796264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55172856A JPS5796264A (en) 1980-12-08 1980-12-08 Speed detector for commutator-less motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55172856A JPS5796264A (en) 1980-12-08 1980-12-08 Speed detector for commutator-less motor

Publications (2)

Publication Number Publication Date
JPS5796264A true JPS5796264A (en) 1982-06-15
JPS6361625B2 JPS6361625B2 (en) 1988-11-29

Family

ID=15949556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55172856A Granted JPS5796264A (en) 1980-12-08 1980-12-08 Speed detector for commutator-less motor

Country Status (1)

Country Link
JP (1) JPS5796264A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605793A (en) * 1983-06-23 1985-01-12 Sony Corp Speed detecting circuit
JPH0454499U (en) * 1990-09-11 1992-05-11

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605793A (en) * 1983-06-23 1985-01-12 Sony Corp Speed detecting circuit
JPH0530215B2 (en) * 1983-06-23 1993-05-07 Sony Corp
JPH0454499U (en) * 1990-09-11 1992-05-11

Also Published As

Publication number Publication date
JPS6361625B2 (en) 1988-11-29

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