GB1205426A - Improvements in electric power units - Google Patents
Improvements in electric power unitsInfo
- Publication number
- GB1205426A GB1205426A GB55920/67A GB5592067A GB1205426A GB 1205426 A GB1205426 A GB 1205426A GB 55920/67 A GB55920/67 A GB 55920/67A GB 5592067 A GB5592067 A GB 5592067A GB 1205426 A GB1205426 A GB 1205426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- contact
- thyristor
- motor
- contactor
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
1,205,426. Control of D.C. motors. ROBERT BOSCH G.m.b.H. 8 Dec., 1967 [8 Dec., 1966], No. 55920/67. Heading H2J. A power unit e.g. in an industrial truck comprises a motor 10, 11 controlled by a thyristor 28, at least one reversing contactor 12 . . . 17 which when de-energized breaks the motor circuit, a direction selector switch 49 in series with which is the contact 54 of a contactor 55, and an auxiliary contact 48 shunting the contact 54 and closed only when a speed controller 47 is at the zero position. The arrangement is such that as the selector switch 49 is changed over the reversing contactor 12 or 13 drops out and opens the motor circuit and neither 12 nor 13 can be re-energized until contact 48 is closed. If the thyristor 28 has failed and remains conducting when the controller is returned to zero the contact 48 establishes a short circuit which blows a fuse 56 in the contactor circuit. The motor is a series machine and is energized via thyristor 28 in a series of pulses of variable width, controlled by an undisclosed unijunction transistor trigger circuit 44. A tapped transformer 32 charges a commutating capacitor 35 to about twice supply voltage, depending upon motor load, and of opposite polarity; a commutating thyristor 36 is controlled by a second triggering circuit 45. At full speed the thyristor circuit is shunted by a contact 42. A resistor 23 provides a signal for an undisclosed load limiting arrangement in controller 46, and freewheeling diodes 26, 27 are provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB0090205 | 1966-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1205426A true GB1205426A (en) | 1970-09-16 |
Family
ID=6985166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB55920/67A Expired GB1205426A (en) | 1966-12-08 | 1967-12-08 | Improvements in electric power units |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1538379A1 (en) |
| GB (1) | GB1205426A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434247A (en) * | 2018-12-08 | 2019-03-08 | 郑州工业应用技术学院 | A kind of Anti-electric shock energy-saving device for electric welding machine |
-
1966
- 1966-12-08 DE DE19661538379 patent/DE1538379A1/en active Pending
-
1967
- 1967-12-08 GB GB55920/67A patent/GB1205426A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1538379A1 (en) | 1970-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |