JPS5656163A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS5656163A JPS5656163A JP13102379A JP13102379A JPS5656163A JP S5656163 A JPS5656163 A JP S5656163A JP 13102379 A JP13102379 A JP 13102379A JP 13102379 A JP13102379 A JP 13102379A JP S5656163 A JPS5656163 A JP S5656163A
- Authority
- JP
- Japan
- Prior art keywords
- pole
- point
- rotor
- stator
- air gap
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
PURPOSE:To eliminate a torque dead point in a brushless motor by shifting the peak point of a field magnetic flux from the center of a pole and driving it in a two-phase half wave. CONSTITUTION:An uneven portion is formed on the circumferential direction on rotor poles 31-34 made of soft magnetic material. The raised portion confronts the pole portions 51-54 of a stator through short air gap, and the recessed portion confronts them through long air gap. Permanent magnets 41-44 are magnetized with polarities as indicated with angular shape. Exciting coils 61-64 are wound on the pole portions 51-54 of the yoke 50 of the stator. The coils 61-64 are alternately energized in response to the position of the rotor detected by a Hall element 81. Since the peak point of the magnetic flux density is thus shifted from the center of the pole to the boundary of any pole, the torque dead point can be eliminated in any point of the rotor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13102379A JPS5656163A (en) | 1979-10-11 | 1979-10-11 | Brushless motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13102379A JPS5656163A (en) | 1979-10-11 | 1979-10-11 | Brushless motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5656163A true JPS5656163A (en) | 1981-05-18 |
Family
ID=15048189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13102379A Pending JPS5656163A (en) | 1979-10-11 | 1979-10-11 | Brushless motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5656163A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5990279U (en) * | 1982-12-07 | 1984-06-19 | 山洋電気株式会社 | Permanent magnet rotor motor |
JPS62500985A (en) * | 1984-12-13 | 1987-04-23 | エバンズ、ジョン・マ−チン | Method and device for measuring thoracic electric field potential difference |
JPS6358888U (en) * | 1986-10-03 | 1988-04-19 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832806B1 (en) * | 1968-07-30 | 1973-10-09 | ||
JPS4951512A (en) * | 1972-09-22 | 1974-05-18 | ||
JPS5463308A (en) * | 1977-10-31 | 1979-05-22 | Hitachi Ltd | Dc brushless motor |
-
1979
- 1979-10-11 JP JP13102379A patent/JPS5656163A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832806B1 (en) * | 1968-07-30 | 1973-10-09 | ||
JPS4951512A (en) * | 1972-09-22 | 1974-05-18 | ||
JPS5463308A (en) * | 1977-10-31 | 1979-05-22 | Hitachi Ltd | Dc brushless motor |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5990279U (en) * | 1982-12-07 | 1984-06-19 | 山洋電気株式会社 | Permanent magnet rotor motor |
JPH0357114Y2 (en) * | 1982-12-07 | 1991-12-25 | ||
JPS62500985A (en) * | 1984-12-13 | 1987-04-23 | エバンズ、ジョン・マ−チン | Method and device for measuring thoracic electric field potential difference |
JPS6358888U (en) * | 1986-10-03 | 1988-04-19 |
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