JPS5549963A - Commutatorless dc motor - Google Patents
Commutatorless dc motorInfo
- Publication number
- JPS5549963A JPS5549963A JP12145378A JP12145378A JPS5549963A JP S5549963 A JPS5549963 A JP S5549963A JP 12145378 A JP12145378 A JP 12145378A JP 12145378 A JP12145378 A JP 12145378A JP S5549963 A JPS5549963 A JP S5549963A
- Authority
- JP
- Japan
- Prior art keywords
- sinusoidal
- flux density
- magnet
- exciting current
- pole
- 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
- Brushless Motors (AREA)
Abstract
PURPOSE:To eliminate the generation of counter electromotive force and irregular rotation, by performing multipolar magnetization to provide a sinusoidal distribution of magnetic flux density around a permanent magnet and supplying a sinusoidal exciting current to stator windings in accordance with the action of magnetism sensors opposing each other. CONSTITUTION:The polar magnetization of a rotor magnet 4, which serves also as a magnetic pole position detecting magnet, is performed to provide such a sinusoidal distribution of magnetic flux density that the flux density has its maximum value in the center of each pole and is zero at the coupled parts of the pole. Magnetism sensors 7, 7', 7'' are placed at an angular spacing of 120 deg. in the face of the magnet 4 and connected to stator windings 6, 6', 6'' through linear DC amplifiers 8, 8', 8'' so that a sinusoidal exciting current flows through each stator winding. Because switching is not effected, no counter electromotive force is caused. The exciting current is smoothly varied to prevent irregular rotation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12145378A JPS5549963A (en) | 1978-10-04 | 1978-10-04 | Commutatorless dc motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12145378A JPS5549963A (en) | 1978-10-04 | 1978-10-04 | Commutatorless dc motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549963A true JPS5549963A (en) | 1980-04-11 |
Family
ID=14811499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12145378A Pending JPS5549963A (en) | 1978-10-04 | 1978-10-04 | Commutatorless dc motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549963A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56166757A (en) * | 1980-05-24 | 1981-12-22 | Sony Corp | Brushless motor |
JPH0348376U (en) * | 1989-09-14 | 1991-05-09 | ||
KR20190049828A (en) | 2016-11-15 | 2019-05-09 | 닛폰세이테츠 가부시키가이샤 | Apparatus, method and program for monitoring operation of high-frequency resistance welding and induction heating welding of a steel pipe |
-
1978
- 1978-10-04 JP JP12145378A patent/JPS5549963A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56166757A (en) * | 1980-05-24 | 1981-12-22 | Sony Corp | Brushless motor |
JPH0348376U (en) * | 1989-09-14 | 1991-05-09 | ||
KR20190049828A (en) | 2016-11-15 | 2019-05-09 | 닛폰세이테츠 가부시키가이샤 | Apparatus, method and program for monitoring operation of high-frequency resistance welding and induction heating welding of a steel pipe |
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