摘要:
Apparatus and method are provided for inductively heating workpieces with varying characteristics in the same induction coil while selectively controlling the induced heat temperature distribution profile of each workpiece with one or more flux compensators inserted into the induction coil along with the workpiece to be inductively heated.
摘要:
Bekannt ist ein sensorgesteuertes Kochfeld mit einer Kochfeldplatte, insbesondere aus Glaskeramik, mit zumindest einer Kochzone, die mittels eines unterhalb der Kochfeldplatte angeordneten Heizelementes beheizbar ist, sowie mit einer unterhalb der Kochfeldplatte angeordneten und gegen deren Unterseite im Bereich eines flächenmäßig begrenzten Meßfleckes gerichteten Wärmestrahlungs-Sensoreinheit, die in Verbindung steht mit einer Steuereinheit zur Regelung der Heizleistung des Heizelementes. Um topfunabhängig eine möglichst genaue Heizleistungsregelung zu erreichen, ist erfindungsgemäß vorgesehen, daß der Wert des Transmissionsgrades des Materials der Kochfeldplatte zumindest im Bereich des Meßfleckes zumindest im spektralen Meßbereich der Wärmestrahlungs-Sensoreinheit kleiner als 30 %, vorzugsweise kleiner als 10 % und insbesondere annähernd etwa 0 % ist.
摘要:
An induction heating device for a metal strip, the induction heating device including: an induction coil that is provided on one strip thickness direction side or on both strip thickness direction sides of a metal strip that travels along its length direction, and that induces an induction current in the metal strip when a primary current is passed through the induction coil, the induction current configuring a closed loop as viewed from the strip thickness direction of the metal strip; plural magnetic cores that face the metal strip in the strip thickness direction and that are disposed at a specific position separated from the metal strip by a specific distance so as to concentrate magnetic flux generated by the induction coil; and a moving mechanism that is coupled to the magnetic cores, and that moves the magnetic cores so as to increase or decrease a disposed number of the magnetic cores at the specific position disposed side-by-side along a strip width direction of the metal strip.
摘要:
The present invention intends to, when running one induction heating apparatus using a three-phase AC power supply without the use of a Scott connection transformer, prevent the occurrence of a phase where no current flows. The present invention is an induction heating system 100 that uses a three-phase AC power supply 4 to run an induction heating apparatus 2 including an induction heating coil 21, and the induction heating system 100 has an intermediate apparatus 3 including a coil 31 that is wound on an iron core 30 forming a closed magnetic circuit and has an even number of turns. In addition, a winding start point 21x of the induction heating coil 21 is connected to the U phase of the three-phase AC power supply 4 and a winding end point 21y of the induction heating coil 21 is connected to a midpoint 31z of the coil 31 of the intermediate apparatus 3. Further, a winding start point 31x and winding end point 31y of the coil 31 of the intermediate apparatus 3 are connected to the V and W phases of the three-phase AC power supply 4, respectively.
摘要:
Um eine hohe elektrische Effizienz zu erreichen, wird eine Hausgeräteinduktionsheizvorrichtung (12, 12'), insbesondere eine Kochfeldinduktionsheizvorrichtung, mit zumindest einem ersten Induktor (20, 20'), zumindest einer Parallelkapazität (24) und zumindest einem, von einem Bestandteil einer Heizfrequenzeinheit (30) verschiedenen Schaltelement (26), das dazu vorgesehen ist, die Parallelkapazität (24) in zumindest einem Betriebsmodus anhaltend dem ersten Induktor (20) zumindest im Wesentlichen parallel zu schalten, vorgeschlagen.
摘要:
High frequency electrical heating apparatus in which metal parts (10) are heated as they are advanced, either for annealing or forge welding purposes, and in which the electrical heating current is supplied by a solid state D.C. to A.C. inverter (2-5, 8) through a load matching and frequency control circuit (13) which maintains the desired load current and current frequency with changes in the load impedance caused by the metal parts (10) as they are advanced.