JPS55111689A - Brushless dc motor - Google Patents
Brushless dc motorInfo
- Publication number
- JPS55111689A JPS55111689A JP1801079A JP1801079A JPS55111689A JP S55111689 A JPS55111689 A JP S55111689A JP 1801079 A JP1801079 A JP 1801079A JP 1801079 A JP1801079 A JP 1801079A JP S55111689 A JPS55111689 A JP S55111689A
- Authority
- JP
- Japan
- Prior art keywords
- brushless
- rotor
- motor
- waveform
- information
- 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 provide a drive current having desired accurate waveform in a brushless DC motor by encoding the drive signal waveform information to digital code, storing the digital code on the entire periphery of the rotor, and reading it by a detector to form a drive signal. CONSTITUTION:A magnetic coating layer 17 is formed on the entire side periphery of the outer periphery of a rotor yoke 3 of a brushless DC motor, magnetic tracks are formed to record drive current waveform information through a magnetic head at the layer 17 to store the information thereon. Multi-track heads 18, 19 are arranged at the position where their electric angles are different at 90 deg. each other as an element for reading the waveform information. The signals picked up by the heads 18, 19 are supplied through limiter amplifiers 20, 21, comparators 22, 23 and flip-flops 24, 25 to stator coils 4, 5. Accordingly, accurate waveform signal can be readily obtained to provide constant rotary torque regardless of the rotational angle position of the rotor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1801079A JPS55111689A (en) | 1979-02-19 | 1979-02-19 | Brushless dc motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1801079A JPS55111689A (en) | 1979-02-19 | 1979-02-19 | Brushless dc motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55111689A true JPS55111689A (en) | 1980-08-28 |
JPS624954B2 JPS624954B2 (en) | 1987-02-02 |
Family
ID=11959699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1801079A Granted JPS55111689A (en) | 1979-02-19 | 1979-02-19 | Brushless dc motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55111689A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57183206A (en) * | 1981-04-21 | 1982-11-11 | Siemens Ag | Pole position detector in linear motor for vehicle running in restriction by truck |
JPS5812589A (en) * | 1981-07-10 | 1983-01-24 | Nippon Telegr & Teleph Corp <Ntt> | Drive device for brushless motor |
US4568862A (en) * | 1983-04-15 | 1986-02-04 | Mavilor Systemes, S.A. | Commutatorless d.c. motor with electronic commutation |
US4584505A (en) * | 1984-06-14 | 1986-04-22 | Yeongchoon Chung | Torque-speed control system for asynchronous D.C. brushless motor |
US5013988A (en) * | 1987-10-29 | 1991-05-07 | Fanuc Ltd | Absolute position encoder |
KR100319138B1 (en) * | 2000-01-06 | 2002-01-04 | 구자홍 | Fault correction circuit of 3-phase brushless DC motor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS555010A (en) * | 1978-06-23 | 1980-01-14 | Nippon Telegr & Teleph Corp <Ntt> | Method of driving brushless motor |
-
1979
- 1979-02-19 JP JP1801079A patent/JPS55111689A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS555010A (en) * | 1978-06-23 | 1980-01-14 | Nippon Telegr & Teleph Corp <Ntt> | Method of driving brushless motor |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57183206A (en) * | 1981-04-21 | 1982-11-11 | Siemens Ag | Pole position detector in linear motor for vehicle running in restriction by truck |
JPS5812589A (en) * | 1981-07-10 | 1983-01-24 | Nippon Telegr & Teleph Corp <Ntt> | Drive device for brushless motor |
US4568862A (en) * | 1983-04-15 | 1986-02-04 | Mavilor Systemes, S.A. | Commutatorless d.c. motor with electronic commutation |
US4584505A (en) * | 1984-06-14 | 1986-04-22 | Yeongchoon Chung | Torque-speed control system for asynchronous D.C. brushless motor |
US5013988A (en) * | 1987-10-29 | 1991-05-07 | Fanuc Ltd | Absolute position encoder |
KR100319138B1 (en) * | 2000-01-06 | 2002-01-04 | 구자홍 | Fault correction circuit of 3-phase brushless DC motor |
Also Published As
Publication number | Publication date |
---|---|
JPS624954B2 (en) | 1987-02-02 |
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