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    • 8. 发明申请
    • VACUUM HEATING DEVICE AND VACUUM HEAT TREATMENT METHOD
    • 真空加热装置和真空热处理方法
    • US20120045190A1
    • 2012-02-23
    • US13218766
    • 2011-08-26
    • Tsuyoshi YOSHIMOTOKatsumi YAMANETetsuhiro OHNOTakahiro MIZOGUCHI
    • Tsuyoshi YOSHIMOTOKatsumi YAMANETetsuhiro OHNOTakahiro MIZOGUCHI
    • H05B37/00H05B1/00
    • H02M5/257H01L21/67115
    • A uniform voltage is applied to loads even to other than a multiple of three loads made of heating lamps connected in parallel to each other, without causing any burden on a primary side. The number of loads is divided into a multiple of three and a multiple of two. A three-phase AC voltage is applied to three primary windings, which are connected as a Y-connection or a Δ-connection. Secondary windings, which are each magnetically coupled to a primary winding of a plurality of three-phase transformers and have the same number of turns, are connected with the multiple of three loads. The number of turns of the M-seat primary winding of a Scott transformer is divided into two at a midpoint, to which an end of the T-seat primary winding having a number of turns equal to (√3)/2 times that of the M-seat primary winding, is connected and to which the three-phase AC voltage is applied. The M-seat primary winding and the T-seat primary winding in at least one Scott transformers are each magnetically coupled with each of the secondary windings having the same number of turns. The multiple of two loads are connected to the secondary windings so that no secondary windings appear without a load connected thereto. Thus, an AC voltage can be uniformly applied to the heating lamps without increasing any burden on the primary side.
    • 对于负载均匀的电压施加到除了由彼此并联连接的加热灯构成的三个负载的倍数之外的负载,而不会对初级侧造成任何负担。 负载的数量分为三个的倍数和二的倍数。 三相交流电压被施加到三个初级绕组,它们作为Y型连接或“连接”连接。 每个磁耦合到多个三相变压器的初级绕组并且具有相同匝数的次级绕组与三个负载的倍数相连接。 Scott变压器的M座一次绕组的匝数在中点被分为两个,T座的初级绕组的一端的匝数等于(√3)/ 2倍于 M座的初级绕组被连接并且被施加三相交流电压。 在至少一个Scott变压器中的M座的初级绕组和T座的初级绕组各自与具有相同匝数的每个次级绕组磁耦合。 两个负载的倍数连接到次级绕组,使得没有次级绕组出现而没有与其连接的负载。 因此,可以在加热灯上均匀地施加AC电压,而不会增加初级侧的任何负担。