Vacuum heating device and vacuum heat treatment process

摘要

Vacuum heating device comprising:a voltage converter, in which a three-phase - - ac voltage, which are comprised of a three-phase - ac - energy source is supplied, is entered in there,and wherein a ac - voltage, of which the three-phase - - ac voltage is adapted in their magnitude, is output as a secondary voltage; anda number n of loads, which in each case with a predetermined number of heating lamps is provided, which are parallel can be supplied with current,the secondary voltage is applied to the heating, and the heating heat waves, whereinthe voltage converter contains:a three-phase transformer, which contains three primary windings, which is in a y - form of connection or a δ - form of connection is connected, to which a three-phase - - ac voltage is applied and wherein three secondary windings magnetically with the respective primary windings are coupled, wherein a secondary winding energy to a respective one of the plurality of loads; anda scott - transformer, which is an m - seat - transformer and a t - seat - transformer, wherein both ends of an m - seat primary winding of the m - seat - transformer with any type of different phases of the three-phase ac voltage - - are connected, one end of the t - seat primary winding in the t - seat - transformer with a center point is connected, to which the number of turns of the m - seat primary winding is halved, wherein the other end of the t - seat primary winding with a remaining a phase of the three-phase - - ac voltage is connected, wherein a number of turns of a secondary winding magnetically with the m - seat primary winding, which have the same number of turns, such as the secondary winding, which has magnetically with the t - seat primary winding is coupled, are coupled, and wherein said t - seat primary windingn="23" a number of turns, which is equal to the (√ 3) / 2 - times that of the m - seat primary winding is,wherein a plurality of three phases of transformers and at least one of the scott - transformers are used,a multiple p of three and a multiple of q is selected from two,wherein a sum of p and q the number n of loads forms,the multiple p of the three loads with energy of the three phases transformers is supplied,the multiple q of two loads with energy from the scott - transformers is supplied, as a result of which it is permitted by the heating lamps, heat, andwith the number n of loads is not equal to a multiple of three.