GB1145301A - Improvements relating to motor control systems - Google Patents
Improvements relating to motor control systemsInfo
- Publication number
- GB1145301A GB1145301A GB12047/65A GB1204765A GB1145301A GB 1145301 A GB1145301 A GB 1145301A GB 12047/65 A GB12047/65 A GB 12047/65A GB 1204765 A GB1204765 A GB 1204765A GB 1145301 A GB1145301 A GB 1145301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- motor
- phase
- controlled
- pulse
- 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.)
- Expired
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
- H02P7/291—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 with on-off control between two set points, e.g. controlling by hysteresis
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
1,145,301. Transistor oscillator circuits. EVERSHED & VIGNOLES Ltd. 18 March, 1966 [22 March, 1965], No. 12047/65. Heading H3T. [Also in Divisions G3 and H2] An electric motor is energized with pulses of uniform length and amplitude, the interval between them and hence their frequency being controlled in response to the difference between a reference voltage V and motor back E.M.F. during the " off " periods. The control circuit comprises a multivibrator having PNP transistors VT1, VT2, and capacitors C1, C2, the discharge of C2, corresponding to the " off period," being controlled by NPN transistor VT5 which is associated with VT6 which has the control voltages applied to its base through R2, R3. Conduction of transistor VT2 effects conduction of a power transistor VT4 in series with the motor. The commutator ripple in the back E.M.F. is smoothed by the capacitor C2. A pair of diodes D1, D2 ensures cut-off of transistor VT6 while VT4 is conducting, and to prevent the circuit from switching on prematurely in response to the transient produced at the end of each pulse VT5 and VT6 are cut off by a pulse from the collector of VT1 when that switches on, for a time determined by C3, R4. Alternatively to the D.C. motor shown, one phase of a two-phase A.C. motor may be controlled in like manner, the other phase being continuously energized. A diode D3 protects VT5, VT6 from the pulse applied via C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12047/65A GB1145301A (en) | 1965-03-22 | 1965-03-22 | Improvements relating to motor control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12047/65A GB1145301A (en) | 1965-03-22 | 1965-03-22 | Improvements relating to motor control systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1145301A true GB1145301A (en) | 1969-03-12 |
Family
ID=9997480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12047/65A Expired GB1145301A (en) | 1965-03-22 | 1965-03-22 | Improvements relating to motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1145301A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5026307U (en) * | 1973-07-02 | 1975-03-26 | ||
| JPS5049617A (en) * | 1973-09-05 | 1975-05-02 | ||
| JPS5746313B1 (en) * | 1971-07-19 | 1982-10-02 |
-
1965
- 1965-03-22 GB GB12047/65A patent/GB1145301A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746313B1 (en) * | 1971-07-19 | 1982-10-02 | ||
| JPS5026307U (en) * | 1973-07-02 | 1975-03-26 | ||
| JPS5326172Y2 (en) * | 1973-07-02 | 1978-07-04 | ||
| JPS5049617A (en) * | 1973-09-05 | 1975-05-02 |
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