JPS55106095A - Brushless dc motor - Google Patents
Brushless dc motorInfo
- Publication number
- JPS55106095A JPS55106095A JP1360679A JP1360679A JPS55106095A JP S55106095 A JPS55106095 A JP S55106095A JP 1360679 A JP1360679 A JP 1360679A JP 1360679 A JP1360679 A JP 1360679A JP S55106095 A JPS55106095 A JP S55106095A
- Authority
- JP
- Japan
- Prior art keywords
- memories
- magnetic field
- rotor
- rotational speed
- 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
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
PURPOSE: To avoid torque ripple of a brushless DC motor by storing information of accurate sine wave signals in memories, reading the stored information responsive to the rotational speed of a rotor and the magnetic field from a rotor magnet and forming an electric current flowing through the stator coil.
CONSTITUTION: Information corresponding to the positive half cycle duration of a sine wave is stored in the state that the phases are different at 90° each other in memories 20 and 21. The zero crossing point signal CS4 of the rise of magnetic field is obtained from a magnetic field signal ES outputted from a Hall element 27 disposed at the position in the same phase as an electrical angle of a stator coil 4 to reset counters 25, 26. The counters 25, 26 count the rotational speed signal PFG of the rotor to designate the addresses of the memories 20 and 21. The information read from the memories 20 and 21 is supplied through a pulse duration modulator circuit to stator coils 4, 5.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1360679A JPS55106095A (en) | 1979-02-08 | 1979-02-08 | Brushless dc motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1360679A JPS55106095A (en) | 1979-02-08 | 1979-02-08 | Brushless dc motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55106095A true JPS55106095A (en) | 1980-08-14 |
JPS6235356B2 JPS6235356B2 (en) | 1987-07-31 |
Family
ID=11837885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1360679A Granted JPS55106095A (en) | 1979-02-08 | 1979-02-08 | Brushless dc motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55106095A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60198425A (en) * | 1984-03-23 | 1985-10-07 | Kataoka Kikai Seisakusho:Kk | Device for measuring and controlling take-up torque |
US4697125A (en) * | 1986-03-24 | 1987-09-29 | Performance Controls, Inc. | Method and apparatus for determining shaft position and for providing commutation signals |
US5886489A (en) * | 1996-12-04 | 1999-03-23 | International Business Machines Corporation | Apparatus and method for reducing spindle power and acoustic noise in a disk drive |
-
1979
- 1979-02-08 JP JP1360679A patent/JPS55106095A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60198425A (en) * | 1984-03-23 | 1985-10-07 | Kataoka Kikai Seisakusho:Kk | Device for measuring and controlling take-up torque |
JPH0442310B2 (en) * | 1984-03-23 | 1992-07-13 | Kataoka Kikai Seisakusho Kk | |
US4697125A (en) * | 1986-03-24 | 1987-09-29 | Performance Controls, Inc. | Method and apparatus for determining shaft position and for providing commutation signals |
US5886489A (en) * | 1996-12-04 | 1999-03-23 | International Business Machines Corporation | Apparatus and method for reducing spindle power and acoustic noise in a disk drive |
Also Published As
Publication number | Publication date |
---|---|
JPS6235356B2 (en) | 1987-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4162435A (en) | Method and apparatus for electronically commutating a direct current motor without position sensors | |
CA1292504C (en) | Sensorless brushless motor | |
JPS62244265A (en) | Multiphase dc motor and controller for the same | |
US3663878A (en) | Direct current motor commutation system responsive to c.e.m.f. | |
JPS55106095A (en) | Brushless dc motor | |
JPH0767306B2 (en) | Driving method for brushless DC motor without position detector | |
RU2053591C1 (en) | Magnetoelectric generator | |
JPH03504915A (en) | Rotor position detection technology | |
JPS55109188A (en) | Brushless dc motor | |
JP2897210B2 (en) | Sensorless drive for brushless motor | |
JPS5671489A (en) | Brushless dc motor | |
USH939H (en) | Commutator pulse tachometer | |
JP2584039B2 (en) | Rotating head cylinder device | |
JPS6235354B2 (en) | ||
SU122415A2 (en) | Angle sensor | |
SU484461A1 (en) | Contactless DC Tachogenerator | |
SU1279023A1 (en) | Rectifier electric motor | |
JP3117210B2 (en) | Drive device for brushless motor | |
JPS60180468A (en) | Position controlling axial air gap type coreless brushless motor | |
JPS55100084A (en) | Brushless dc motor | |
SU177959A1 (en) | reversible step-by-step motor | |
SU1296938A1 (en) | Contactless reversible d.c.tacho generator | |
JPS6220790B2 (en) | ||
JPS57142563A (en) | Rotating speed detection circuit for brushless motor | |
JPS56162987A (en) | Commutatorless dc motor |