摘要:
A power supply for a magnetron provided with an inverter circuit, a high-tension transformer, a magnetron. In order to shorten the time required from the feeding of the power to the cathode of the magnetron to the arrival at the rated output through the start of the oscillation, a mechanism for detecting the oscillation start time point of the magnetron is provided so that the controlling operation is adapted to be effected to be rated output immediately after the oscillation. Winding for output voltage detecting use is provided on the high-tension transformer to detect the oscillation of the magnetron.
摘要:
A magnetron feeding apparatus and a method of controlling the magnetron feeding apparatus having an inverter circuit for converting the DC power supply into high-frequency power, a high-tension transformer for converting the high-frequency power into the high-tension power to be applied upon the magnetron, an output voltage detecting portion for detecting the output voltage of the high-tension transformer, an input current detecting portion for detecting the input current into the inverter circuit, a power controlling means for controlling the operation of the inverter circuit by the output voltage information of the output voltage detecting portion and the input current information of the input current detecting portion.
摘要:
Dispositif de mise sous tension d'un circuit d'alimentation pour magnétron comprenant un transformateur, élévateur de tension (11). L'une (18) des bornes de l'enroulement primaire (10) de ce transformateur (11) est reliée à l'une des bornes (1) du réseau par un interrupteur (3) à commande manuelle, tandis que son autre borne (19) est réunie à l'autre borne (2) du réseau par l'intermédiaire d'un triac (20) et d'une résistance de mesure (24) du courant de celui-ci. Un circuit intégré de déclenchement (30) du triac (20) lors des passages par zéro des signaux appliqués à ses deux entrées de synchronisation (33, 34) comprend une sortie (35) reliée à la gâchette (23) du triac (20). L'une (33) de ces entrées de synchronisation (33, 34) est réunie, par un circuit déphaseur en quadrature (27) à la jonction du triac (20) avec l'autre borne (19) du primaire (10); elle reçoit une tension ou un courant déphasé de 90 ° par rapport à la tension du réseau, de telle sorte que le premier déclenchement du triac (20) se produit lors d'un extrémum (valeur de crête) de cette dernière.
摘要:
A combining arrangement comprises a power combiner 3 having at least four ports; a first match-dependent oscillator 1 connected to input power at a first frequency to a first input port of the power combiner 3; a second match-dependent oscillator 2 connected to input power at a second frequency to a second input port of the power combiner 3; and a mismatch 4 connected to a third port of the power combiner. The power combiner 3 is operative to combine power from the first and second oscillators and, when the first and second frequencies are different, to apply a fraction of the combined power to the mismatch 4. The mismatch 4 reflects at least some of the fraction to the first and second oscillators to phase and frequency lock their outputs. A fourth output port of the power combiner is connected to receive the combined power. The power combiner attenuation is variable to adjust the proportion of the combined power split between the third port and fourth output port from 0% to 100% of the total combined power for any power values at the first input port and second input port. The oscillators may be magnetrons. The arrangement may include a plurality of power combiners connected in series, in parallel or in an arrangement including both in series and in parallel connections.
摘要:
A magnetron of the type having a strap ring has protruding regions of the strap ring arranged so as to increase the capacitance between the strap ring and another strap ring or between the strap ring and anode vanes. Increasing the capacitance at selected portions of the strap ring allows control of the frequency response of the magnetron.
摘要:
Es wird ein Schaltnetzteil zum Betreiben von Magnetrons in Mikrowellenöfen beschrieben, das eine quasi stetige Regelung der Leistung bei höherem Wirkungsgrad erlaubt. Dies wird dadurch erreicht, daß die impulsförmige Stromauskopplung durch zwei antiparallele Klemmschaltungen LH1, CM1, DK1; LH2, CM2, DK2) so arbeitet, daß in der Durchflußphasenzeit die erste den zugehörigen Klemmkondensator (CM1) auflädt, während die zweite Klemmschaltung die Energie an das Magnetron M abgibt, und daß in der darauffolgenden Sperrphasenzeit die erste Klemmschaltung Energie an das Magnetron M abgibt, während die zweite Klemmschaltung den zugehörigen Klemmkondensator (CM2) auflädt.