WO1979001165A1 - Circuit de transfert de puissance - Google Patents

Circuit de transfert de puissance Download PDF

Info

Publication number
WO1979001165A1
WO1979001165A1 PCT/GB1979/000092 GB7900092W WO7901165A1 WO 1979001165 A1 WO1979001165 A1 WO 1979001165A1 GB 7900092 W GB7900092 W GB 7900092W WO 7901165 A1 WO7901165 A1 WO 7901165A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
winding
input
air gap
core
Prior art date
Application number
PCT/GB1979/000092
Other languages
English (en)
Inventor
T Hemingway
J Baron
Original Assignee
British Aerospace
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 British Aerospace filed Critical British Aerospace
Publication of WO1979001165A1 publication Critical patent/WO1979001165A1/fr

Links

Classifications

    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • This invention relates to a power transfer circuit capable of transferring electrical power from a source to a load across an air gap.
  • an object of the present invention is to enable powers of perhaps 100 watts to be efficiently transferred across a gap of perhaps 1-3 mm.
  • One application of such a device is to the supply of power to a missile on a launching
  • a power transfer circuit includes a ferromagnetic or other
  • transformer core having an air gap, input and output windings on parts of the core on either side of the air gap, and a d.c./a.c. converter circuit including the input winding in a resonant circuit determining the frequency of d.c./a.c. conversion, which frequency
  • the input winding may be in parallel with a capacitor.
  • O PI automatically varies with the air gap, means that the transformer action between the input and output windings by way of the ferromagnetic core is always at resonance frequency at which the reactive current
  • the resonant circuit is included as part of an oscillator
  • the resonant circuit is preferably supplied with d.c.through a large enough
  • the transformer comprises effectively primary and secondary assemblies, each with a core and a winding, the assemblies being separated by the air gap across which the power is to be transferred.
  • An operating frequency of the order of 10 KH __ is suitable.
  • the gap may vary in length between say 0.5 mm and
  • the gap can vary in length and also laterally, so that precise relative positioning of the two core parts is not necessary.
  • the gap 13 is defined between two halves 14 and 15, of a pot-type transformer core, one half of which carries the primary power winding 16 and the other of which carries a secondary winding 17
  • the positive side of the.-source 11 is connected through a large choke 18 to the centre tap of the primary winding 16 and the negative side of the source is connected to the common emitter connection 19 of a pair of switching
  • transistors T and T_ The bases of the two transistors and T_ are connected to opposite ' ends of an auxiliary winding 21 closely coupled to the winding 16 for sharply turning the transistors T 1 and 2 ON and OFF alternately when the circuit
  • a capacitor 22 is connected across the primary winding 16 so that the frequency of oscillation is determined by the value of that capacitor and the value of the inductance of the primary winding 16
  • one transistor is in a saturated state and the other transistor
  • the states of the transistors are interchanged as is the polarity of voltage across the tuned circuit.
  • the tuned circuit is permitted to execute a continuous sinusoidal
  • the *Q' may be very low when the core gap is zero, but with a gap of 0.5mm, the 'Q' has improved to a value of 2. 20.
  • the frequency of oscillation increases by only
  • a sheet of protective material can be bonded over the core faces within the gap. 25.
  • the improvement in efficiency of transfer of power from the d.c. input 11 to the load 12 is from 30. about 25 percent by previous means, to 70 percent by
  • a single transformer could be used for a number of different loads, such as the load 12, by including a triac 24 in series with each load and a corresponding secondary winding 17; one such additional load and
  • winding arrangement is shown at 25, and includes another series triac 26.
  • the triacs can be triggered in turn by use of control logic so that power from the primary winding 16 can be transferred across the same gap 13 to any of the loads at a time.
  • OM arranged for providing a triggering drive via the gap to the triacs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)

Abstract

Un circuit de transfert de puissance pour transferer la puissance d'une entree a courant continu (11) a une charge (12) au moyen d'un entrefer (13) dans un noyau ferro-magnetique (14) de sorte que le transfert d'energie a travers l'espacement se fasse sans contact. Le noyau comprend un enroulement d'entree (16) dont l'inductance depend de la longueur de l'entrefer (13), laquelle inductance determine la frequence de resonance d'un oscillateur comprenant un condensateur (22) connecte a l'enroulement (16). L'oscillateur comprend une paire de transistors de commutation (T1) et (T2) et un generateur d'oscillations sinusoidales.
PCT/GB1979/000092 1978-05-31 1979-05-31 Circuit de transfert de puissance WO1979001165A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB25710/78 1978-05-31
GB2571078 1978-05-31

Publications (1)

Publication Number Publication Date
WO1979001165A1 true WO1979001165A1 (fr) 1979-12-27

Family

ID=10232033

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1979/000092 WO1979001165A1 (fr) 1978-05-31 1979-05-31 Circuit de transfert de puissance

Country Status (3)

Country Link
EP (1) EP0016774A1 (fr)
GB (1) GB2038129B (fr)
WO (1) WO1979001165A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500168A (en) * 1967-05-03 1970-03-10 Gen Electric Self-driven inverter
US3818312A (en) * 1971-09-17 1974-06-18 Philips Corp Dc-ac converter
FR2225908A1 (en) * 1973-04-12 1974-11-08 Abadie Ste Expl Laboratoire Fluorescent tube adjustable static convertor - gives variable luminous intensity of tube simply and cheaply
FR2231177A1 (fr) * 1973-05-25 1974-12-20 Sachs Systemtechnik Gmbh
US4016477A (en) * 1975-04-29 1977-04-05 Isodyne Inc. Novel multi-path leakage transformer and inverter ballast

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500168A (en) * 1967-05-03 1970-03-10 Gen Electric Self-driven inverter
US3818312A (en) * 1971-09-17 1974-06-18 Philips Corp Dc-ac converter
FR2225908A1 (en) * 1973-04-12 1974-11-08 Abadie Ste Expl Laboratoire Fluorescent tube adjustable static convertor - gives variable luminous intensity of tube simply and cheaply
FR2231177A1 (fr) * 1973-05-25 1974-12-20 Sachs Systemtechnik Gmbh
US4016477A (en) * 1975-04-29 1977-04-05 Isodyne Inc. Novel multi-path leakage transformer and inverter ballast

Also Published As

Publication number Publication date
GB2038129A (en) 1980-07-16
EP0016774A1 (fr) 1980-10-15
GB2038129B (en) 1983-03-09

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Designated state(s): AT CH DE FR GB LU SE