GB1525924A - Electrical controller - Google Patents

Electrical controller

Info

Publication number
GB1525924A
GB1525924A GB4577874A GB4577874A GB1525924A GB 1525924 A GB1525924 A GB 1525924A GB 4577874 A GB4577874 A GB 4577874A GB 4577874 A GB4577874 A GB 4577874A GB 1525924 A GB1525924 A GB 1525924A
Authority
GB
United Kingdom
Prior art keywords
load
winding
circuit
transformer
transistor
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
Application number
GB4577874A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SPALL G
Original Assignee
SPALL G
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SPALL G filed Critical SPALL G
Priority to GB4577874A priority Critical patent/GB1525924A/en
Publication of GB1525924A publication Critical patent/GB1525924A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/601—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors using transformer coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M11/00—Power conversion systems not covered by the preceding groups
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages

Abstract

1525924 Control systems for consuming apparatus G W SPALL 23 Oct 1975 [23 Oct 1974] 45778/74 Heading H2H A load 15 is supplied from an A.C. source LN by way of the winding 12 of a transformer 11, the secondary winding 13 of which is connected to a transistor 18. A signal generator 20 controls the ON-OFF conduction periods of the transistor 18 thereby to alternately shortcircuit and open-circuit the secondary winding 13. Thus by controlling the durations of the ON-OFF periods of the transistor 18 by varying the mark space ratio of the signal generator 20 the current in the load 15 can be controlled. A switch 24 enables continuous energization of the load 15. The bridge 16 may be replaced by a rectifying device 16 if desired together with a free wheel diode 10 and a diode 17, a circuit 19 being provided for suppressing purposes. In an alternative arrangement the primary winding 12 may be directly connected to the A.C. source LN and the transformer 11 provided with a tertiary winding 14 to which a load 25 is connected. The alternate short-circuit and open circuit periods of the secondary winding 13 then controls the load current by controlling the transformed action between the windings 12, 14. The tertiary winding may be in the form of a short circuited turn of a hollow conductor through which water may be passed for heating purposes. The apparatus may be applied to a motor control system (see Fig. 2) wherein the transformer 11 may have duplicate secondary and tertiary windings 13, 14 controlling two load devices 25 in order to control both forward and reverse motions of a single or three-phase A.C. motor, limit switches 27 being provided to automatically change the direction of rotation of the motor. Alternatively the two loads 25 may control the forward and retract motions of a pile hammer.
GB4577874A 1975-10-23 1975-10-23 Electrical controller Expired GB1525924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4577874A GB1525924A (en) 1975-10-23 1975-10-23 Electrical controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4577874A GB1525924A (en) 1975-10-23 1975-10-23 Electrical controller

Publications (1)

Publication Number Publication Date
GB1525924A true GB1525924A (en) 1978-09-27

Family

ID=10438561

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4577874A Expired GB1525924A (en) 1975-10-23 1975-10-23 Electrical controller

Country Status (1)

Country Link
GB (1) GB1525924A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154608A2 (en) * 1984-01-23 1985-09-11 Spazio, Selenia Solid state relay for space and avionic applications
GB2274219A (en) * 1993-01-09 1994-07-13 Smiths Industries Plc Power control for an electric heater
US8961146B2 (en) 2010-08-30 2015-02-24 Flow Control LLC Electronically controlled liquid dispensing system with modular tubing and power design

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154608A2 (en) * 1984-01-23 1985-09-11 Spazio, Selenia Solid state relay for space and avionic applications
EP0154608A3 (en) * 1984-01-23 1987-12-23 Spazio, Selenia Solid state relay for space and avionic applications
GB2274219A (en) * 1993-01-09 1994-07-13 Smiths Industries Plc Power control for an electric heater
US8961146B2 (en) 2010-08-30 2015-02-24 Flow Control LLC Electronically controlled liquid dispensing system with modular tubing and power design

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee