JPS5752390A - Rotational pulse detecting circuit for reel motor - Google Patents
Rotational pulse detecting circuit for reel motorInfo
- Publication number
- JPS5752390A JPS5752390A JP12675380A JP12675380A JPS5752390A JP S5752390 A JPS5752390 A JP S5752390A JP 12675380 A JP12675380 A JP 12675380A JP 12675380 A JP12675380 A JP 12675380A JP S5752390 A JPS5752390 A JP S5752390A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- rotational pulse
- reel motor
- brushed
- detected
- 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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
PURPOSE:To simplify automatic stopping structure for a tape recorder, by detecting variations of current waveform of a brushed DC motor in order to detect existence of rotational pulse of a reel motor. CONSTITUTION:A reel motor M consisting of a brushed DC motor is controlled by a drive circuit 11 including transistors Q1-Q6, and playback, fast forward, and rewind are performed. Voltage variation of a resistor R1 for motor torque setting is detected by a rotational pulse detector 12 consisting of a differential amplifier 122 and a mono-multivibrator 123. Its output is induced to a logic LC via an integrator 124 and a switching circuit 125. And a control signal is produced. Therefore, existence of a rotational pulse can be detected by utilizing the indication of characteristics that current waveform shows different from those of revolution when the motor M is locked at a tape end. Accurate automatic stopping operation can be made possible.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12675380A JPS5752390A (en) | 1980-09-12 | 1980-09-12 | Rotational pulse detecting circuit for reel motor |
US06/300,480 US4443745A (en) | 1980-09-12 | 1981-09-09 | Rotation signal detection device of DC motor with brushes |
GB8127352A GB2088591B (en) | 1980-09-12 | 1981-09-10 | Rotation detection device for dc motor with brushes |
BR8105829A BR8105829A (en) | 1980-09-12 | 1981-09-11 | ROTATION SIGNAL DETECTION DEVICE FOR A CONTINUOUS CURRENT ENGINE WITH BRUSHES |
DE19813152952 DE3152952C2 (en) | 1980-09-12 | 1981-09-12 | |
DE19813136219 DE3136219A1 (en) | 1980-09-12 | 1981-09-12 | TURN SIGNAL DETECTOR FOR A BRUSHED DC MOTOR |
SG45287A SG45287G (en) | 1980-09-12 | 1987-05-18 | Rotation control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12675380A JPS5752390A (en) | 1980-09-12 | 1980-09-12 | Rotational pulse detecting circuit for reel motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5752390A true JPS5752390A (en) | 1982-03-27 |
Family
ID=14943057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12675380A Pending JPS5752390A (en) | 1980-09-12 | 1980-09-12 | Rotational pulse detecting circuit for reel motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5752390A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5932379A (en) * | 1982-07-16 | 1984-02-21 | ローベルト・ボッシュ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Device for connecting and interrupting electric motor drive unit |
CN113377041A (en) * | 2021-05-26 | 2021-09-10 | 国网江西省电力有限公司供电服务管理中心 | Complex current waveform analog playback circuit and dynamic control method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50144023A (en) * | 1974-05-10 | 1975-11-19 |
-
1980
- 1980-09-12 JP JP12675380A patent/JPS5752390A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50144023A (en) * | 1974-05-10 | 1975-11-19 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5932379A (en) * | 1982-07-16 | 1984-02-21 | ローベルト・ボッシュ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Device for connecting and interrupting electric motor drive unit |
JPH0440954B2 (en) * | 1982-07-16 | 1992-07-06 | Bosch Gmbh Robert | |
CN113377041A (en) * | 2021-05-26 | 2021-09-10 | 国网江西省电力有限公司供电服务管理中心 | Complex current waveform analog playback circuit and dynamic control method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5671855A (en) | Playback device of disc | |
JPS589504B2 (en) | Method and device for indicating location of recording tape | |
US4288823A (en) | Apparatus for and method of distinguishing pauses to control selective replay in tape recording/reproduction systems | |
JPS54113305A (en) | Tape stop detector | |
GB1492091A (en) | Magnetic tape recording and/or playback apparatus | |
JPS5752390A (en) | Rotational pulse detecting circuit for reel motor | |
KR890006200Y1 (en) | Speed control circuit for motor | |
EP0030113B1 (en) | Recording-time mode detector and video tape recorder or reproducer including such a detector | |
SU1179204A1 (en) | Device for article inspection by means of berkgauzen effect | |
JPS5641544A (en) | Magnetic recording and reproducing unit | |
JPS563447A (en) | Tape recorder | |
JPS6034109Y2 (en) | Automatic stop control circuit for tape recorder | |
KR860000710B1 (en) | Automatic time constant control circuit | |
JPS5718040A (en) | Time mode detecting device | |
JPS5687272A (en) | Inter-music detecting circuit | |
JPS5665346A (en) | Tape recorder | |
JPH0216433Y2 (en) | ||
KR860002915Y1 (en) | Reel control circuit | |
JPS56124187A (en) | Display method in information retrieving device | |
JPH0570215B2 (en) | ||
JPS57150177A (en) | Display device for tape amount | |
JPH0424773B2 (en) | ||
JPS5698386A (en) | Motor control circuit | |
JPS5589930A (en) | Magnetic recording and reproducing unit | |
JPS5647975A (en) | Magnetic reproducing device |