H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 36/00 (2006.01) H02J 15/00 (2006.01) H02M 1/08 (2006.01) H02M 1/084 (2006.01) H02M 5/458 (2006.01) H02M 7/00 (2006.01) H02M 7/219 (2006.01)
Patent
CA 2197212
A control circuit generates signals for controlling the sequence in which selected input signals are carried across the terminals of a polyphase switching conversion circuit. The control circuit includes switching elements galvanically isolated from the selected input signals with the control signals electrically isolated from the switching devices. The control circuit for the conversion circuit is, in essence, electrically isolated from the conversion circuit. The control circuit is configured to have a topology analogous to that of the switching converter and includes conventional switching diodes as well as a light generating device optically coupled to a light sensor which, in response to detection of light from the optically coupled light generating device, provides a control signal to a corresponding switching device. The control circuit also includes a source of regulated and electrically isolated power to operate drive circuitry for the switching devices. The cryogenically cooled switching converter is used to rectify AC input signals generated by a number of variable speed wind-driven turbines into a DC output signal which can be reconverted into a fixed frequency AC signal, stored, or conveyed via a cryogenically cooled superconducting line to a remote location. A power generation system includes cryogenically cooled power conversion circuitry for converting alternating current (AC) input signals which have naturally occurring, fluctuating frequency characteristics, into a direct current output signal. The control circuit, described above, may be used to control the power conversion circuitry.
Un circuit de commande (21) génère des signaux qui commandent la séquence suivant laquelle les signaux d'entrée sont acheminés aux bornes d'un circuit de conversion à commutation polyphasé. Le circuit de commande comprend des éléments de commutation (72-74, 75-77) galvaniquement isolés des signaux d'entrée sélectionnés, les signaux de commande étant électriquement isolés des dispositifs de commutation. Le circuit de commande destiné au circuit de conversion est, par essence, électriquement isolé du circuit de conversion. Le circuit de commande est configuré de telle manière que sa topologie soit analogue à celle du convertisseur de commutation et comprend plusieurs diodes de commutations classiques ainsi qu'un dispositif générant de la lumière optiquement couplé à un capteur de lumière qui,en réponse à la détection de la lumière émise par le dispositif générant de la lumière optiquement couplé, envoie un signal de commande à un dispositif de commutation correspondant. Le circuit de commande comprend également une source de puissance régulée et électriquement isolée qui sert à faire fonctionner le circuit d'excitation des dispositifs de commutation. Le convertisseur de commutation à refroidissement cryogénique sert à redresser les signaux d'entrée à courant alternatif générés par une pluralité de turbines entraînées par le vent à vitesse variable.
Gold Calman
Mueller Otward
Schempp Ellery F.
American Superconductor Corporation
Smart & Biggar
LandOfFree
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