JPS5694987A - Braking circuit for sewing machine - Google Patents
Braking circuit for sewing machineInfo
- Publication number
- JPS5694987A JPS5694987A JP17066879A JP17066879A JPS5694987A JP S5694987 A JPS5694987 A JP S5694987A JP 17066879 A JP17066879 A JP 17066879A JP 17066879 A JP17066879 A JP 17066879A JP S5694987 A JPS5694987 A JP S5694987A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- sewing machine
- top position
- state holding
- 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.)
- Granted
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
- H02P3/12—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 by short-circuit or resistive braking
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
PURPOSE:To surely stop a motor with a brake current which is so small as not to make a motor temperature over a rated value by a method wherein actuating signals are fed to ON-OFF controlling trigger circuit intermittently for a prescribed period even after a detecting circuit of the top position reached by a sewing machine needle has been finished for operation. CONSTITUTION:In case of a single sewing with a sewing machine needle, the top position detecting circuit 14 operates when the needle reaches again the top position after a cycle of its vertical motion, and the ON-OFF controlling trigger circuit 12 is operated by an output of the circuit 14 to cause a braking thyristor 10 to be turn ON. Accordingly, the motor 5 is applied with a short-circuit braking to cause a number of rotations to be reduced rapidly. At this time, even the sewing machine is rotated exceeding a working angle of the top position detecting circuit 14 and the top position detecting circuit 14 finishes to operate, a state holding circuit 15 operates to continuously supply drive signals to the trigger circuit 12 for a given period of time necessary for the sewing machine being surely stopped. After the predetermined period of time after the operation starting of state holding circuit 15, a timer circuit 13 permits the state holding circuit 15 and the trigger circuit 11 to be reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17066879A JPS5914996B2 (en) | 1979-12-27 | 1979-12-27 | Sewing machine motor braking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17066879A JPS5914996B2 (en) | 1979-12-27 | 1979-12-27 | Sewing machine motor braking circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5694987A true JPS5694987A (en) | 1981-07-31 |
| JPS5914996B2 JPS5914996B2 (en) | 1984-04-06 |
Family
ID=15909152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17066879A Expired JPS5914996B2 (en) | 1979-12-27 | 1979-12-27 | Sewing machine motor braking circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5914996B2 (en) |
-
1979
- 1979-12-27 JP JP17066879A patent/JPS5914996B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5914996B2 (en) | 1984-04-06 |
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