GB1330131A - Control means for electric motors operated from batteries - Google Patents
Control means for electric motors operated from batteriesInfo
- Publication number
- GB1330131A GB1330131A GB4672769A GB1330131DA GB1330131A GB 1330131 A GB1330131 A GB 1330131A GB 4672769 A GB4672769 A GB 4672769A GB 1330131D A GB1330131D A GB 1330131DA GB 1330131 A GB1330131 A GB 1330131A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- current
- amplifier
- motor
- battery
- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
1330131 Control of D.C. motors CABLEFORM Ltd 16 Sept 1970 [23 Sept 1969 6 Feb 1970 7 Feb 1970 14 Feb 1970] 46727/69 5741/70 5990/70 and 7188/70 Heading H2J A series or shunt motor A is supplied from battery B through a thyristor switch S, while detector D provides a signal V1 representing the peak motor current, this signal being applied to an amplifier G which also receives a threshold signal VR corresponding to the current at which maximum design horse-power is reached. Until the signal V1 exceeds the signal VR, there is no output from the amplifier G so that the switch S is controlled entirely by a demand signal obtained from a control pedal. When the signal V1 exceeds the signal VR, the demand signal is modified by the output of amplifier G whereby the motor voltage decreases with increasing current. The degree of voltage reduction is determined by the gain of amplifier G which is set by adjustment of feedback H. Typical speed-current characteristics for shunt and series motors are described, Fig. 2 (not shown). A fuse FS in the battery circuit has a lower rating than the maximum motor current. Similar fuses may interconnect adjacent cells of the battery, Fig. 4 (not shown). A PTC thermistor TH responds to the temperature of the heat sink of the thyristors, the motor or other part to be protected. If the temperature exceeds a predetermined level, the demand signal is modified to reduce the current from the switch S. Alternatively, an output stage of the amplifier G contains the thermistor. If desired VR may be obtained from a plurality of thermistors sensing the temperature of various parts of the apparatus. Typical characteristics relating speed or duty cycle to current are discussed for a series motor, its supply battery and the thyristor switch operating at a constant recommended temperature, Fig. 3 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4672769 | 1969-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1330131A true GB1330131A (en) | 1973-09-12 |
Family
ID=10442365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4672769A Expired GB1330131A (en) | 1969-09-23 | 1969-09-23 | Control means for electric motors operated from batteries |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB1330131A (en) |
ZA (1) | ZA706375B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4458183A (en) * | 1981-10-15 | 1984-07-03 | The University Court Of The University Of Edinburgh | DC Motor control |
EP1873884A1 (en) * | 2006-05-23 | 2008-01-02 | Dr. Johannes Heidenhain GmbH | Protective circuit for a converter |
EP2395621A1 (en) * | 1999-03-12 | 2011-12-14 | Eaton Corporation | Thermal compensation control for a motor starter |
-
1969
- 1969-09-23 GB GB4672769A patent/GB1330131A/en not_active Expired
-
1970
- 1970-09-18 ZA ZA706375A patent/ZA706375B/en unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4458183A (en) * | 1981-10-15 | 1984-07-03 | The University Court Of The University Of Edinburgh | DC Motor control |
EP2395621A1 (en) * | 1999-03-12 | 2011-12-14 | Eaton Corporation | Thermal compensation control for a motor starter |
EP1873884A1 (en) * | 2006-05-23 | 2008-01-02 | Dr. Johannes Heidenhain GmbH | Protective circuit for a converter |
US7649724B2 (en) | 2006-05-23 | 2010-01-19 | Dr. Johannes Heidenhain Gmbh | Protective circuit for a converter |
CN101079541B (en) * | 2006-05-23 | 2012-08-29 | 约翰尼斯海登海恩博士股份有限公司 | Protection circuit for frequency converter |
Also Published As
Publication number | Publication date |
---|---|
ZA706375B (en) | 1971-05-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1486817A (en) | Circuit arrangements for controlling the mark-space ratio of a solid state switch in a dc circuit | |
GB1015225A (en) | Improvements in circuits for protecting electrical loads from an adverse condition | |
JPS59158415A (en) | Heat efficiency adjusting circuit for heating element | |
US3152298A (en) | Generator field winding regulation with direct thermistor control of the field winding control circuit | |
US3437826A (en) | Control circuit for controlling duty of a plurality of d-c sources | |
GB1330131A (en) | Control means for electric motors operated from batteries | |
GB1137894A (en) | Solid state temperature control circuit with anticipation and compensation features | |
US3383561A (en) | Pulse width modulation control system | |
JPS5640917A (en) | Temperature control circuit of heater | |
US3171019A (en) | Temperature control system | |
GB1452611A (en) | Solid state thermal overload indicator | |
GB2048525A (en) | Timed control circuit for electric heater | |
JPS5625389A (en) | Starting control circuit for single-phase induction motor | |
US3414741A (en) | Control systems | |
GB1187270A (en) | Improvements relating to Temperature Control in Electrical Power-Supply Units | |
JPS55136869A (en) | Current controlling circuit for dummy load | |
JPS5720818A (en) | Exothermic temperature control device of resistance heating element | |
KR850000731B1 (en) | Regulated dc power supply | |
SU1667031A1 (en) | Thermoelectric system for regulating temperature | |
GB1294332A (en) | Induction motor drive particularly for a refrigerator compressor | |
US2302659A (en) | Power generating system | |
GB1141642A (en) | Improvements relating to the control of the output of fuel cells | |
ES355787A1 (en) | A Starting Circuit for a Single-Phase Asynchronous Motor | |
GB902486A (en) | A protective circuit arrangement for a transistor switch | |
JPS5479386A (en) | Temperature controller |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |