A Control System for Power Electromagnetic Devices

Аннотация

A new concept for constructing a control system of power electromagnetic devices (PEDs) is considered. The system is based on using additional high-frequency (HF) electrodynamic processes in a PED magnetic conductor. To implement the proposed principle, the PED is equipped with units of dipole C‑antennas covering the magnetic conductor of a PED and made in the form of a detachable spatial capacitor on the outer surface of the carrier dielectric base of which multisection spatially distributed plates are located. An external HF low-voltage source is connected to these plates. When operating the PED in its magnetic conductor, there are two independent electrodynamic processes: a low-frequency (LF) process, which is defined by the operating current of the PED, and the HF process, which is excited by C-antennas. In addition, the PED acts as an electromagnetic sensor recording the desired parameters of HF electrodynamic processes, which determine both the state of the magnetic conductor of the PED and the current state of the PED itself. Based on the Maxwell’s equations and the Umov–Poynting theorem, mathematical models describing the physical processes occurring in the electromagnetic system under consideration were derived that take into account the structural features of the PED and the unit of dipole C-antennas. A variant of circuit design of the control system of the PED under consideration is proposed, which makes it possible to record different informative parameters directly related to the current state of the PED. The proposed notion of constructing the control system is universal; in fact, it has no limitations when applying to different types of PEDs and can be widely used in the relevant industries to the control of parameters of electromagnetic couplings and brakes, solenoid valves, linear positioners, locking devices, etc.