JPS6439284A - Driver for brushless motor - Google Patents
Driver for brushless motorInfo
- 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
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.
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) |
-
1987
- 1987-08-03 JP JP62194156A patent/JPS6439284A/en active Pending
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