JPS5546886A - Servo circuit - Google Patents
Servo circuitInfo
- Publication number
- JPS5546886A JPS5546886A JP12022178A JP12022178A JPS5546886A JP S5546886 A JPS5546886 A JP S5546886A JP 12022178 A JP12022178 A JP 12022178A JP 12022178 A JP12022178 A JP 12022178A JP S5546886 A JPS5546886 A JP S5546886A
- Authority
- JP
- Japan
- Prior art keywords
- comparating
- frequency
- speed
- pulses
- motor
- 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
Abstract
PURPOSE: To obtain stable operation and enhance accoustic quality of a tape recorder by providing a feed back circuit wherein a medium running speed is defined as a reference speed and a comparating frequincy is constant for both high- and low- motor speed.
CONSTITUTION: A reference frequency otained by a reference-frequency generator SF and a comparating frequency obtained by a comparating-frequency setting circuit CFS are compared in a phase comparator PC, and output pulses which correspond to the phase difference are generated. An LPF converts the output from the comparator PC to a direct current, sends it to a driving amplifier A1, and rorates an ac motor ACM. While, a rotation sensor FG, which is moved with the motor, converts the number of rotation to pulses, and sends them to an amplifier A2, to a wave- form shaping circuit SH, and to the comparating-frequency setting circuit CFS, where the pulses are converted to a comparating frequency which corresponds to the position of a speed-setting unit SW, thereby stable operation can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12022178A JPS5546886A (en) | 1978-09-29 | 1978-09-29 | Servo circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12022178A JPS5546886A (en) | 1978-09-29 | 1978-09-29 | Servo circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5546886A true JPS5546886A (en) | 1980-04-02 |
Family
ID=14780872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12022178A Pending JPS5546886A (en) | 1978-09-29 | 1978-09-29 | Servo circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5546886A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62227674A (en) * | 1986-03-28 | 1987-10-06 | Juki Corp | Controller for ink jet printer |
JPH0190298U (en) * | 1987-12-04 | 1989-06-14 |
-
1978
- 1978-09-29 JP JP12022178A patent/JPS5546886A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62227674A (en) * | 1986-03-28 | 1987-10-06 | Juki Corp | Controller for ink jet printer |
JPH0190298U (en) * | 1987-12-04 | 1989-06-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5330718A (en) | Controller for motor | |
JPS54149696A (en) | Rubbing detection between rotary body and stationary body | |
JPS5546886A (en) | Servo circuit | |
JPS5592585A (en) | Servo circuit | |
CA1329258C (en) | Servo for a rotary head drum of vtr | |
JPS5311008A (en) | Recording/reproducing apparatus | |
JPS55157741A (en) | Information making and recording apparatus for adjusting color scanner | |
JPS55109185A (en) | Motor speed controller | |
JPS5436514A (en) | Controller for scanning drive motor | |
JPS5566295A (en) | Apparatus for controlling rotating phase of motor | |
JPS5320521A (en) | Motor control device | |
JPS5434019A (en) | Control system for scanning drive motor | |
JPS5327082A (en) | Detector for rotating speed of motor | |
JPS5629857A (en) | Video signal recording system | |
JPS5583488A (en) | Speed control circuit for phase fixed motor | |
JPS543577A (en) | Production of rotational speed detector | |
JPS5534856A (en) | Voltage controlling method of inverter | |
JPS5688689A (en) | Speed control apparatus for dc motor | |
JPS538719A (en) | Phase synchronous control device of revolving body | |
JPS5611639A (en) | Drive unit for tape winding frame | |
JPS5534875A (en) | Servo circuit for dc motor | |
JPS5546885A (en) | Speed-control device for variable-speed motor | |
JPS53127627A (en) | Controller for induction motor | |
JPS5762788A (en) | Speed control device for rotating electric motor | |
JPS5373317A (en) | Speed control system of dc motors |