JPS5674093A - Brushless dc motor - Google Patents
Brushless dc motorInfo
- Publication number
- JPS5674093A JPS5674093A JP15143279A JP15143279A JPS5674093A JP S5674093 A JPS5674093 A JP S5674093A JP 15143279 A JP15143279 A JP 15143279A JP 15143279 A JP15143279 A JP 15143279A JP S5674093 A JPS5674093 A JP S5674093A
- Authority
- JP
- Japan
- Prior art keywords
- output
- oscillator
- rotor
- brushless
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
PURPOSE:To obtain a rotary torque adapted for the brushless DC motor without torque ripple by reading an accurate sine wave information, stored in a memory in synchronism with the magnetic field of a rotor magnet, modulating it into pulse signal and driving the brushless DC motor therewith. CONSTITUTION:Digital information is read from ROMs 21, 31 storing accurate sine wave signal digital information sampled by the repetition number per one revolution of a rotor 1 of the rotor revolving speed corresponding signal FG from a frequency generator 41 and sampling number relating to the magnetic field of the rotor magnet in accordance with the outputs from counters 22, 32 for counting the pulses PFG. The read information is obtained through flip-flops 71S, 71C reset by the output from the oscillator 76 and set by the output of the counter 73 for counting the output of the oscillator 72. The read information is converted into pulse width modulation signals PWS, PWC having repetition frequency of the oscillated output of the oscillator 76, and is thus inputted to the drive circuits 80, 90 through switches 55, 65 switched in synchronism with the magnetic signals ES, EC from Hall elements 51, 61.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15143279A JPS5674093A (en) | 1979-11-22 | 1979-11-22 | Brushless dc motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15143279A JPS5674093A (en) | 1979-11-22 | 1979-11-22 | Brushless dc motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5674093A true JPS5674093A (en) | 1981-06-19 |
Family
ID=15518481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15143279A Pending JPS5674093A (en) | 1979-11-22 | 1979-11-22 | Brushless dc motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5674093A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013058920A2 (en) * | 2011-10-21 | 2013-04-25 | Allegro Microsystems, Inc. | Motor control circuit and method that reduce speed jitter of an electric motor |
-
1979
- 1979-11-22 JP JP15143279A patent/JPS5674093A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013058920A2 (en) * | 2011-10-21 | 2013-04-25 | Allegro Microsystems, Inc. | Motor control circuit and method that reduce speed jitter of an electric motor |
WO2013058920A3 (en) * | 2011-10-21 | 2014-03-13 | Allegro Microsystems, Llc | Motor control circuit and method that reduce speed jitter of an electric motor |
US8742713B2 (en) | 2011-10-21 | 2014-06-03 | Allegro Microsystems, Llc | Motor control circuit and method that reduce speed jitter of an electric motor |
TWI487266B (en) * | 2011-10-21 | 2015-06-01 | Allegro Microsystems Llc | Circuit and method for driving a multi-phase brushless dc motor |
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