METHODS OF SYNTHESIS OF FORCED VALVED DC ELECTROMAGNETS IN CIRCUIT WITH BALLAST RESISTOR
The method of synthesis of the forced valved DC electromagnet which is controlled according to the circuit with ballast resistor is proposed. The method is based on the design equations representing the conditions of operation, return and heating as well as on the experimentally received loading characteristic in the dimensionless generalized form. The equations are reduced to single nonlinear equation concerning the core size, they are suitable for the valvate magnetic systems with the L-shaped bracket of a magnetic circuit used in actuators of switching electric apparatuses. Calculations are carried out to assess the influence of basic data of the design on the core size of an electromagnet, induction values in the core basis at operation and return and magnetomotive force. The most significant influence on the core size of a critical working air clearance in magnetic system is established.