JPS6443090A - Pwm control of miniature brushless dc motor - Google Patents
Pwm control of miniature brushless dc motorInfo
- 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
Links
- 230000010354 integration Effects 0.000 abstract 2
Landscapes
- 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.
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)
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 |
-
1987
- 1987-08-07 JP JP62196228A patent/JPS6443090A/en active Pending
Cited By (1)
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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