JPS5467620A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS5467620A JPS5467620A JP13418977A JP13418977A JPS5467620A JP S5467620 A JPS5467620 A JP S5467620A JP 13418977 A JP13418977 A JP 13418977A JP 13418977 A JP13418977 A JP 13418977A JP S5467620 A JPS5467620 A JP S5467620A
- Authority
- JP
- Japan
- Prior art keywords
- transistors
- brushless motor
- stator windings
- currents
- current
- 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
Links
Abstract
PURPOSE: To prevent S/N ratio of a brushless motor from deteriorating at winding switching time by reducing the current phase angles of the respective stator windings smaller than 180° and smoothly switching the currents in the respective stator windings regardless of the magnetic waveform of the main permanent magnet of the rotor of the motor.
CONSTITUTION: When the rotor of a brushless motor is revolved, the outputs A, -A of a hall element 210 are applied to the bases of first differential transistors 212a, 212b. The two outputs B, -B of a hall element 211 are applied respectively to two differential transistors 215, 216. The collector currents IA, I-A of the transistors 212a, 212b flow to the emitters of the transistors 215, 216. The output currents IA-B, IA-B, I-A-B, I-AB from the transistors 215, 216 are applied to the transistors 220 a to 220b to cause the current flowing through stator windings 212a to 212d become phase angle of 90° so as to smoothly switch the current.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52134189A JPS5927197B2 (en) | 1977-11-08 | 1977-11-08 | brushless electric motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52134189A JPS5927197B2 (en) | 1977-11-08 | 1977-11-08 | brushless electric motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5467620A true JPS5467620A (en) | 1979-05-31 |
JPS5927197B2 JPS5927197B2 (en) | 1984-07-04 |
Family
ID=15122505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52134189A Expired JPS5927197B2 (en) | 1977-11-08 | 1977-11-08 | brushless electric motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5927197B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61254095A (en) * | 1985-04-30 | 1986-11-11 | Matsushita Electric Ind Co Ltd | Drive device for brushless motor |
USRE36860E (en) * | 1981-12-23 | 2000-09-12 | Papst Licensing Gmbh & Co. Kg | Brushless direct current motor |
-
1977
- 1977-11-08 JP JP52134189A patent/JPS5927197B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE36860E (en) * | 1981-12-23 | 2000-09-12 | Papst Licensing Gmbh & Co. Kg | Brushless direct current motor |
JPS61254095A (en) * | 1985-04-30 | 1986-11-11 | Matsushita Electric Ind Co Ltd | Drive device for brushless motor |
Also Published As
Publication number | Publication date |
---|---|
JPS5927197B2 (en) | 1984-07-04 |
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