JPS5796264A - Speed detector for commutator-less motor - Google Patents
Speed detector for commutator-less motorInfo
- Publication number
- JPS5796264A JPS5796264A JP55172856A JP17285680A JPS5796264A JP S5796264 A JPS5796264 A JP S5796264A JP 55172856 A JP55172856 A JP 55172856A JP 17285680 A JP17285680 A JP 17285680A JP S5796264 A JPS5796264 A JP S5796264A
- Authority
- JP
- Japan
- Prior art keywords
- spike voltage
- exciting
- commutator
- phase
- speed
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/489—Digital circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
PURPOSE:To eliminate noise produced by a large commutation of exciting current in a machine in which the period information of signal induced in the exciting coil of a commutator-less motor is used as a speed signal, by processing the speed signal by a position signal. CONSTITUTION:A commutator-less motor has exciting coils Ma to Mc which are successively energized by electric current supplied from transistors 8 to 10 adapted to be successively turned on by signals d to f derived from a position signal generator 29. A rotor constituted by a permanent magnet is rotated as a result of the energization of the exciting coils Ma to Mc. In each exciting coil, induced are a first spike voltage generated by mutual induction when the exciting current is commutated in another phase and a second spike voltage generated when the current of its own phase is cut. These spike voltage are shaped by circuits 11 to 13 and flip-flops 14 to 16 are set by the first spike voltage. The flip-flops are then reset by the position signal e from the phase next to the first-mentioned phase which produces an output h. Therefore, no second spike voltage appears in the output i. Then, a speed pulse k is produced by monostable multivibrators 17 to 19. The speed pulse is converted into voltage through an f-v conversion by a circuit 22, and a speed control is effected by a circuit 23.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55172856A JPS5796264A (en) | 1980-12-08 | 1980-12-08 | Speed detector for commutator-less motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55172856A JPS5796264A (en) | 1980-12-08 | 1980-12-08 | Speed detector for commutator-less motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5796264A true JPS5796264A (en) | 1982-06-15 |
JPS6361625B2 JPS6361625B2 (en) | 1988-11-29 |
Family
ID=15949556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55172856A Granted JPS5796264A (en) | 1980-12-08 | 1980-12-08 | Speed detector for commutator-less motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5796264A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS605793A (en) * | 1983-06-23 | 1985-01-12 | Sony Corp | Speed detecting circuit |
JPH0454499U (en) * | 1990-09-11 | 1992-05-11 |
-
1980
- 1980-12-08 JP JP55172856A patent/JPS5796264A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS605793A (en) * | 1983-06-23 | 1985-01-12 | Sony Corp | Speed detecting circuit |
JPH0530215B2 (en) * | 1983-06-23 | 1993-05-07 | Sony Corp | |
JPH0454499U (en) * | 1990-09-11 | 1992-05-11 |
Also Published As
Publication number | Publication date |
---|---|
JPS6361625B2 (en) | 1988-11-29 |
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