JPS56133995A - Driving circuit for brushless motor - Google Patents

Driving circuit for brushless motor

Info

Publication number
JPS56133995A
JPS56133995A JP3713780A JP3713780A JPS56133995A JP S56133995 A JPS56133995 A JP S56133995A JP 3713780 A JP3713780 A JP 3713780A JP 3713780 A JP3713780 A JP 3713780A JP S56133995 A JPS56133995 A JP S56133995A
Authority
JP
Japan
Prior art keywords
transistor
current
base
transistors
diode
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
JP3713780A
Other languages
Japanese (ja)
Other versions
JPS6242476B2 (en
Inventor
Shunsuke Kohama
Mitsuo Uzuka
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP3713780A priority Critical patent/JPS56133995A/en
Publication of JPS56133995A publication Critical patent/JPS56133995A/en
Publication of JPS6242476B2 publication Critical patent/JPS6242476B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To obtain a brushless motor driving circuit with low power loss by consisting a control current changing in exponential function form for a motor speed control voltage as the base current of a switching transistor for the switching and conduction of an exciting coil. CONSTITUTION:When the speed control voltage Vs is small, a transistor Q5 is fixed at an operating point decided by resistors R6-R9 in accordance with the OFF of the diode D to fix a collector electric potential and constant base current Ib are flowed into driving transistors Q3, Q4 through transistors, Q6, Q7 which are turned on and off by switching signals, (a), (b). With the speed control voltage Vs increased, a current starts to flow into the diode D to increase the base voltage of the transistor Q5 and to decrease the collector electric potential of the transistor Q5. Therefore, the collector currents of transistors Q8, Q9 increase to raise the base currents IB of the driving transistors Q3, Q4 as well. The rate of increase of the base currents IB is decided by the operating current of the diode D caused by installing split resistors R3, R4.
JP3713780A 1980-03-24 1980-03-24 Driving circuit for brushless motor Granted JPS56133995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3713780A JPS56133995A (en) 1980-03-24 1980-03-24 Driving circuit for brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3713780A JPS56133995A (en) 1980-03-24 1980-03-24 Driving circuit for brushless motor

Publications (2)

Publication Number Publication Date
JPS56133995A true JPS56133995A (en) 1981-10-20
JPS6242476B2 JPS6242476B2 (en) 1987-09-08

Family

ID=12489222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3713780A Granted JPS56133995A (en) 1980-03-24 1980-03-24 Driving circuit for brushless motor

Country Status (1)

Country Link
JP (1) JPS56133995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229694A (en) * 1984-04-27 1985-11-15 Hitachi Ltd Current switching circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60229694A (en) * 1984-04-27 1985-11-15 Hitachi Ltd Current switching circuit

Also Published As

Publication number Publication date
JPS6242476B2 (en) 1987-09-08

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