摘要:
An embodiment of a microwave heating apparatus includes a solid state microwave energy source, a first dielectric resonator antenna that includes a first exciter dielectric resonator and a first feed structure in proximity to the first exciter dielectric resonator, one or more additional dielectric resonators stacked above the top surface of the first exciter dielectric resonator to form a vertically-stacked dielectric resonator antenna array. The first feed structure is electrically coupled to the microwave energy source to receive a first excitation signal, and the first exciter dielectric resonator is configured to produce a first electric field in response to the excitation signal provided to the first feed structure.
摘要:
The present invention relates to a household or commercial appliance (1) comprising: a heating chamber (7), a couple of magnetrons (8a)(8b) having relative anodes (TA1)(TA2) and cathodes (TC1)(TC2), a power unit (5, 40, 140) comprising at least a high voltage circuit (9) configured to power-on magnetrons (8a)(8b). The high voltage circuit (9) comprises: a high voltage transformer (13) comprising a primary winding (13a) connected to an alternating voltage source (17) and a secondary high-voltage winding (13b) providing an alternating high voltage (V2) having a period (W) comprising two half periods (W1)(W2), a couple of half-wave voltage doubler circuits (15)(16) which are configured to cooperate with the secondary high-voltage winding (13b) in order to provide a doubled high-voltage (DVH), a first and second unidirectional conducting devices (31)(32) which are connected respectively between the half-wave voltage doubler circuits (15)(16) and a reference terminal (30)(33) having a predetermined potential (GND). The first and second unidirectional conducting devices (31)(32) being configured to cause the half-wave voltage doubler circuits (15)(16) to supply, during a period (W) of the alternating high-voltage (V2), the doubled high-voltage (DVH) to the cathode (TC1)(TC2) of the respective magnetron (8a)(8b) alternately. One of the half-wave voltage doubler circuits (15) supplying the doubled high-voltage (DVH) during one half-period (W1) of the alternating high-voltage (V2), and the other half-wave voltage doubler circuit (16) supplying the doubled high-voltage (DVH) during the other half-period (W2).
摘要:
A booster transformer 100 for driving a magnetron includes a bobbin 11 on which at least a first winding 13 and a secondary winding 15 are wound and a core 19 inserted through the center of the bobbin 11, wherein a winding area of the secondary winding 15 is divided into two areas while interposing a partition wall 23, and an outer diameter d of a wire material of the secondary winding 15 and a width t1 of each of the divided winding areas are so set as to satisfy the relation t1
摘要:
The present invention discloses a high voltage transformer for microwave ovens to output high voltage used to operate a magnetron. The high voltage transformer includes a core (10,60), an output terminal (21), a securing member (70), a terminal block (70), and a high voltage transformer. The core (10,60) accommodates a coil (20) used to generate the high voltage. The output terminal (21) is electrically connected to the coil (20). The securing member (70) secures the output terminal (21). The terminal block (70) is attached to a side of the core (10,60) to insulate the output terminal (21) from the core (10,60).
摘要:
A boosting transformer for a high-frequency heating device includes an insulation member (25), and a primary winding (20) and a secondary winding (21) formed at the insulation member (25) and mutually isolated by the insulation member (25), each winding having a width (W1, W2) and a thickness as measured when the winding is stacked (T1, T2), the width (W1, W2) being smaller than the thickness (T1, T2). As such, the boosting transformer can be reduced in height to readily ensure a distance for insulating locations having therebetween a large potential difference from each other in the transformer's internal structure in designing a structure in which the transformer is attached to a high-frequency heating device. Thus the boosting transformer can be attached to the high-frequency heating device at a location less restrictively and such designing can be facilitated.
摘要:
Disclosed is a device for preventing a high voltage transformer T2 of a microwave oven from being overheated, which directly senses a temperature in a second coil L4 of the high voltage transformer T2 of the microwave oven and thereby supplies or cuts off power to the transformer T2 according to the temperature. In the device, a thermostat TH is opened/closed according to the temperature of the second coil L4 of the transformer T2 so as to regulate power supply to the first coil L3 of the transformer T2, and accordingly the transformer T2 is prevented from overheated.
摘要:
A high voltage transformer includes a fastening to fixedly attach a temperature sensor (40) to a core (10). Accordingly, the present invention provides the high voltage transformer in which the temperature sensor (40) is fixedly attached to the core (10), thereby preventing a shifting of a position of the temperature sensor (40).