Patent ID: 6909928

Claim:
A method for manufacturing bobbins having two terminals and comprised by a primary and a secondary winding each comprising an arrangement of conductors and papers impregnated with a non conductive resin between conductors, having a curing graphic for the resin, including a plurality of values of temperature over time, said method comprising: connecting both bobbin terminals to a variable electric source; calculating an initial amperage to be applied to the primary and secondary bobbin windings; activating the variable electric source; detecting the temperature obtained in both windings; if the temperature is equal to the temperature defined by the curing graphic over current time, then the amperage must be maintained in order to maintain the windings temperature equal to the value predefined in the curing graphic; if the temperature is greater than the temperature defined by the curing graphic over current time, then the amperage must be decreased until the predefined temperature is achieved; if the temperature is lower than the temperature defined by the curing graphic over current time, then the amperage must be increased until the predefined temperature is achieved; repeat the temperature detecting step until the last time value of the curing graphic is achieved; and deactivating the variable electric source when the last time value of the curing graphic is achieved, wherein the variable electric source comprises a variable motorized auto transformer connected to the input of a step down transformer having a capacity of 30 kVA, 24/48 volts and 1250 Amps for controlling the voltage and amperage to predetermined values, said step down transformer comprising a primary winding and two independent windings which comprise the secondary winding and wherein said variable electric source is controlled by electronic means comprising a CPU, volatile and non volatile memory means and data input and output means, connected to control means for the variable electric source.