GB1204525A - Improvements in or relating to power control systems - Google Patents
Improvements in or relating to power control systemsInfo
- Publication number
- GB1204525A GB1204525A GB4685167A GB4685167A GB1204525A GB 1204525 A GB1204525 A GB 1204525A GB 4685167 A GB4685167 A GB 4685167A GB 4685167 A GB4685167 A GB 4685167A GB 1204525 A GB1204525 A GB 1204525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- capacitor
- resistor
- transistor
- potential
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/26—Automatic controllers electric in which the output signal is a pulse-train
-
- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Generation Of Surge Voltage And Current (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
1,204,525. Automatic temperature control systems. DIAMOND H CONTROLS Ltd. Oct.11, 1968 [Oct.13, 1967], No.46851/67. Heading G3R. [Also in Division H2] An arrangement for providing to a load, groups of half cycles corresponding in number to the magnitude of a variable parameter has a source of first pulses of constant amplitude which are modified in magnitude by a control element, a breakdown switch which transmits the modified pulses to a ramp generator, a chopper circuit also fed with the first pulses which provide second pulses of instantaneous value equal to the ramp voltage, and an output device which provides a pulse each time a second pulse exceeds a threshhold value. The parameter may be developed manually e.g. a potential divider or automatically e.g. from a temperature sensitive resistor or a tachogenerator representative of motor speed. Pulses from a full wave rectifier 1 are clipped by a circuit 3-7 and passed through a transistor 15 with unchanging amplitude, the output pulses from which are stabilized by a Zener diode 16 and passed to a potential divider comprising a temperature sensitive resistor 17, and a setting resist- or 18. When the potential at the junction of 17, 18 exceeds the break-over voltage of a device 21, a capacitor 22 charges to the junction potential, which charge passes through a diode 24 to another capacitor 25. The charge on capacitor 22 blocks the device 21 until the charge falls to a releasing value. Discharge of capacitor 22 through resistor 23 and capacitor 25 through resistors 26, 27 produce ramp signals, that from capacitor 25 being applied together with constant amplitude pulses to control electrodes of a transistor 28 which develops instantaneous pulses equal in height to the ramp voltage. When these are greater than a voltage developed across a resistor 31, a transistor 32 conducts to produce constant amplitude pulses in a thyristor firing transformer 33. As temperature sensitive resistor 17 receives pulses, its heat dissipation is less than that produced by a constant current. Resistor 23 varies the proportional band.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4685167A GB1204525A (en) | 1967-10-13 | 1967-10-13 | Improvements in or relating to power control systems |
DE19681802825 DE1802825A1 (en) | 1967-10-13 | 1968-10-12 | Capacity control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4685167A GB1204525A (en) | 1967-10-13 | 1967-10-13 | Improvements in or relating to power control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1204525A true GB1204525A (en) | 1970-09-09 |
Family
ID=10442826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4685167A Expired GB1204525A (en) | 1967-10-13 | 1967-10-13 | Improvements in or relating to power control systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1802825A1 (en) |
GB (1) | GB1204525A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2000329A (en) * | 1977-06-24 | 1979-01-04 | Danfoss As | Apparatus for controlling the supply of power to an electrical load |
-
1967
- 1967-10-13 GB GB4685167A patent/GB1204525A/en not_active Expired
-
1968
- 1968-10-12 DE DE19681802825 patent/DE1802825A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2000329A (en) * | 1977-06-24 | 1979-01-04 | Danfoss As | Apparatus for controlling the supply of power to an electrical load |
GB2000329B (en) * | 1977-06-24 | 1982-02-24 | Danfoss As | Apparatus for controlling the supply of power to an electrical load |
Also Published As
Publication number | Publication date |
---|---|
DE1802825A1 (en) | 1969-08-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |