JPS6443090A - Pwm control of miniature brushless dc motor - Google Patents

Pwm control of miniature brushless dc motor

Info

Publication number
JPS6443090A
JPS6443090A JP62196228A JP19622887A JPS6443090A JP S6443090 A JPS6443090 A JP S6443090A JP 62196228 A JP62196228 A JP 62196228A JP 19622887 A JP19622887 A JP 19622887A JP S6443090 A JPS6443090 A JP S6443090A
Authority
JP
Japan
Prior art keywords
circuit
motor
amplifier
pwm control
detecting
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
JP62196228A
Other languages
Japanese (ja)
Inventor
Takashi Kanai
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.)
Nidec Copal Electronics Corp
Original Assignee
Copal Electronics 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 Copal Electronics Co Ltd filed Critical Copal Electronics Co Ltd
Priority to JP62196228A priority Critical patent/JPS6443090A/en
Publication of JPS6443090A publication Critical patent/JPS6443090A/en
Pending legal-status Critical Current

Links

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  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To improve efficiency, by controlling a motor in pulse width at the best portion of torque curve. CONSTITUTION:A rotor position and speed is detected with a detecting element 12 and a detecting circuit 13, which are then integrated with an integration circuit 19 and inputted into a level comparator 20. Let the waveform deviated at 90 from the above detecting signal be a comparison triangular wave for PWM control through an integration circuit 21, an AGC amplifier 22 and an inverted AGC amplifier 18. This triangular wave is compared with a differential signal operated through a speed amplifier 2 and a current amplifier 3 by a comparator 14. Further, the pulse-width modulated pulse signal supplies the power converted into DC from an AC power source 6 with a rectification circuit 7 and a power source filter 8 to a two-phase brushless DC motor 11. By a coil changeover transistors 9 through a logic circuit 16 and a driver 10. The power loss of a control circuit is thereby checked to the minimum and the occurrence of noise reduced.
JP62196228A 1987-08-07 1987-08-07 Pwm control of miniature brushless dc motor Pending JPS6443090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62196228A JPS6443090A (en) 1987-08-07 1987-08-07 Pwm control of miniature brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62196228A JPS6443090A (en) 1987-08-07 1987-08-07 Pwm control of miniature brushless dc motor

Publications (1)

Publication Number Publication Date
JPS6443090A true JPS6443090A (en) 1989-02-15

Family

ID=16354331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62196228A Pending JPS6443090A (en) 1987-08-07 1987-08-07 Pwm control of miniature brushless dc motor

Country Status (1)

Country Link
JP (1) JPS6443090A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06167032A (en) * 1990-07-18 1994-06-14 Etienne Moinat Device for installing tool at jib end section of construction equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06167032A (en) * 1990-07-18 1994-06-14 Etienne Moinat Device for installing tool at jib end section of construction equipment

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