Algorithmic foundations for the study of electromagnetic processes in the electric drive of a sealed valve

An algorithm for studying electromagnetic processes in the drive of a sealed valve operated at low temperatures is considered. The possibility of installing an additional element between the stator and rotor of the drive electric motor that performs the functions of sealing and heating is shown. A geometric model has been constructed for linking an additional element to the base part - the motor stator. The current density distribution in the sealing element is shown. A method for taking into account the influence of the parameters of the sealing element on the process of electromechanical energy conversion when moving the valve gate is proposed. A mathematical model of the drive has been synthesized using a system of spatial vectors of the stator, rotor and sealing element. The model contains an equation of motion that allows one to take into account moments of inertia and loads, including the reduced mass of the gate and friction losses in the valve. The mechanical characteristics of the drive with various parameters of the sealed element are given. It is shown that the main influence on the electromagnetic torque is exerted by the active resistance of the sealing element. An increase in the relative resistance of the element leads to an increase in torque. The inductive reactance of the additional element does not have a significant effect on the efficiency of the drive. With a high active resistance, the energy characteristics of the valve drive approach those of a drive that does not have a sealing element between the stator and the rotor.