An Electromagnetic Design of Electric Machines for Oil and Gas Facilities

Abstract

An electromagnetic design procedure is proposed that allows taking into account the features of jointly utilizing a semiconductor converter and an electric machine in an electric drive system. The parameters of an electric machine are viewed as distributed and found by solving differential equations with distributed parameters, while the variables of control signals are defined by the conventional numerical techniques of a system of ordinary differential equations. The procedure allows defining the potential reserves of magnetoelectrically excited synchronous machines for drilling rig facilities for the power-to-mass ratio. As was shown by the calculations, the choice of the machine’s rated parameters and main dimensions allows using synchronous machines twice as efficiently in terms of power. It is shown that the no-contact and simple design of synchronous reluctance machines means that the opportunities for using them on drilling rigs are great. With properly selected main dimensions and phase current control laws, the specific weight–size parameters of these machines can be improved as compared with their induction counterparts.