JPS6439284A - Driver for brushless motor - Google Patents

Driver for brushless motor

Info

Publication number
JPS6439284A
JPS6439284A JP62194156A JP19415687A JPS6439284A JP S6439284 A JPS6439284 A JP S6439284A JP 62194156 A JP62194156 A JP 62194156A JP 19415687 A JP19415687 A JP 19415687A JP S6439284 A JPS6439284 A JP S6439284A
Authority
JP
Japan
Prior art keywords
current
circuit
signal
command signal
shaper
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
JP62194156A
Other languages
Japanese (ja)
Inventor
Hiroyuki Oku
Masahiro Yasohara
Hiromitsu Nakano
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 JP62194156A priority Critical patent/JPS6439284A/en
Publication of JPS6439284A publication Critical patent/JPS6439284A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To reduce noise, by slowing a conduction switching command signal with respect to time through a shaper circuit then converting an output signal into a current signal and applying onto a drive transistor. CONSTITUTION:A brushless motor drive comprises a rotor position detecting circuit 76, a drive coil 71, a drive transistor 72, a voltage-current converting circuit 73, a shaper circuit 74 and a conduction switching command circuit 75. A conduction switching command signal fed from a command circuit 75 is shaped into a trapezoidal signal through shaper circuits 74a-74c for respective phases, then the operating signal is converted into a current command signal varying slowly with time through voltage-current converting circuits 73a-73c for respective phases. Driving current corresponding to the current command signal is fed to driving coils 71a-71c. Consequently, abrupt switching of current in driving transistor 72a-72c can be relieved.
JP62194156A 1987-08-03 1987-08-03 Driver for brushless motor Pending JPS6439284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62194156A JPS6439284A (en) 1987-08-03 1987-08-03 Driver for brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62194156A JPS6439284A (en) 1987-08-03 1987-08-03 Driver for brushless motor

Publications (1)

Publication Number Publication Date
JPS6439284A true JPS6439284A (en) 1989-02-09

Family

ID=16319852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62194156A Pending JPS6439284A (en) 1987-08-03 1987-08-03 Driver for brushless motor

Country Status (1)

Country Link
JP (1) JPS6439284A (en)

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