JPS5698390A - Brushless motor - Google Patents

Brushless motor

Info

Publication number
JPS5698390A
JPS5698390A JP12280A JP12280A JPS5698390A JP S5698390 A JPS5698390 A JP S5698390A JP 12280 A JP12280 A JP 12280A JP 12280 A JP12280 A JP 12280A JP S5698390 A JPS5698390 A JP S5698390A
Authority
JP
Japan
Prior art keywords
protecting circuit
transistors
counter electromotive
comparators
capacity
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
JP12280A
Other languages
Japanese (ja)
Inventor
Shotaro Naito
Keiichi Tokuyama
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 JP12280A priority Critical patent/JPS5698390A/en
Publication of JPS5698390A publication Critical patent/JPS5698390A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/34—Modelling or simulation for control purposes

Abstract

PURPOSE:To reduce the capacity of a switching element by providing a protecting circuit for absorbing counter electromotive force generated at an armature coil and another protecting circuit for dropping the switching element to earth potential while the counter electromotive force is generating. CONSTITUTION:Magnetic responsive elements PS1-PS3 for detecting the rotating position of the motor control through comparators OP1-OP3 transistors TR1-TR3 and sequentially drive armature coils A1-A3, respectively. First protecting circuit 1 including a zener diode ZD is provided between the collector and the base of the transistors TR1-TR3, and the second protecting circuit 4 including transistors TR4, TR5 is provided among the comparators OP1-OP3. Accordingly, the counter electromotive forces of the armature coils A1-A3 are absorbed by the first protecting circuit 1 and are dropped to the earth by the second protecting circuit 3, and are thus effectively absorbed, and the capacity of the transistors can be reduced.
JP12280A 1980-01-07 1980-01-07 Brushless motor Pending JPS5698390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12280A JPS5698390A (en) 1980-01-07 1980-01-07 Brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12280A JPS5698390A (en) 1980-01-07 1980-01-07 Brushless motor

Publications (1)

Publication Number Publication Date
JPS5698390A true JPS5698390A (en) 1981-08-07

Family

ID=11465227

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12280A Pending JPS5698390A (en) 1980-01-07 1980-01-07 Brushless motor

Country Status (1)

Country Link
JP (1) JPS5698390A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02114399U (en) * 1989-03-02 1990-09-13
JPH02237689A (en) * 1989-03-10 1990-09-20 Konichi Komatsu Method and device for purifying water
JPH031696U (en) * 1989-05-19 1991-01-09
JPH0336987A (en) * 1989-07-03 1991-02-18 Sankyo Seiki Mfg Co Ltd Drive circuit for brushless motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02114399U (en) * 1989-03-02 1990-09-13
JPH02237689A (en) * 1989-03-10 1990-09-20 Konichi Komatsu Method and device for purifying water
JPH031696U (en) * 1989-05-19 1991-01-09
JPH0336987A (en) * 1989-07-03 1991-02-18 Sankyo Seiki Mfg Co Ltd Drive circuit for brushless motor
JP2554374B2 (en) * 1989-07-03 1996-11-13 株式会社三協精機製作所 Brushless motor drive circuit

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