JPS57183289A - Speed controller for sewing machine - Google Patents
Speed controller for sewing machineInfo
- Publication number
- JPS57183289A JPS57183289A JP56066964A JP6696481A JPS57183289A JP S57183289 A JPS57183289 A JP S57183289A JP 56066964 A JP56066964 A JP 56066964A JP 6696481 A JP6696481 A JP 6696481A JP S57183289 A JPS57183289 A JP S57183289A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- signal
- transistor
- pulse voltage
- base
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
- H02P7/2913—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Abstract
PURPOSE:To improve the constant speed controllability of a sewing machine by full-wave rectifying the AC output voltage of a tachometer generator and applying the voltage in a forward direction to the base of a transistor, thereby shortening the period of generating controlling pulse voltage. CONSTITUTION:The AC output voltage (a) of the AC tachometer generator TG which detects the speed of a motor M is rectified by a full-wave rectifier DB as a rectified voltage (f), and the voltage (f) is applied to the base of a transistor TR3 in the forward direction through a resistor R5, thereby obtaining a pulse voltage (g) at the collector. A monostable multivbrator MM3 is triggered with the fall of the pulse voltage (g) to produce a pulse voltage (h), which is converted via a resistor R7 and a capacitor C1 into a triangular signal (i). A comparator COMP outputs a signal (j) when the triangular signal (i) is lower than a speed command signal VX, producing a signal (j), and an AND circuit AND4 applies the signal (j) to the base of a transistor TR4 when an operation command signal DTS is at high level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56066964A JPS57183289A (en) | 1981-05-06 | 1981-05-06 | Speed controller for sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56066964A JPS57183289A (en) | 1981-05-06 | 1981-05-06 | Speed controller for sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57183289A true JPS57183289A (en) | 1982-11-11 |
Family
ID=13331207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56066964A Pending JPS57183289A (en) | 1981-05-06 | 1981-05-06 | Speed controller for sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57183289A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284388U (en) * | 1985-11-14 | 1987-05-29 | ||
| JPS63189197A (en) * | 1987-01-30 | 1988-08-04 | ジューキ株式会社 | Flickering preventing apparatus at driving time of servo motor |
| JP2006102399A (en) * | 2004-10-08 | 2006-04-20 | Juki Corp | Sewing machine |
-
1981
- 1981-05-06 JP JP56066964A patent/JPS57183289A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284388U (en) * | 1985-11-14 | 1987-05-29 | ||
| JPS63189197A (en) * | 1987-01-30 | 1988-08-04 | ジューキ株式会社 | Flickering preventing apparatus at driving time of servo motor |
| JPH0233277B2 (en) * | 1987-01-30 | 1990-07-26 | Juki Kk | |
| US5016133A (en) * | 1987-01-30 | 1991-05-14 | Juki Corporation | Apparatus for flicker protection when a servo-motor starts |
| JP2006102399A (en) * | 2004-10-08 | 2006-04-20 | Juki Corp | Sewing machine |
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