The paper reviews and analyzes properties of amorphous alloys for the purpose of their application in magnetic systems of electrical apparatus instead of high-permeability electric steels. The studies have shown a possibility of utilizing these alloys in the magnetic structure of a current transformer in the pulsed voltage stabilizer of an automated circuit-breaker semiconductor release.

Operation of two designs of compact multigap dischargers has been investigated in a high-frequency switching mode. It is experimentally revealed that the rational length of single discharge gaps in the designs is 0.3 mm, and the maximum switching frequency is 27000 discharges per second under long-term stable operation of the dischargers. It is shown that in pulsed corona discharge reactors, the pulse front sharpening results in increasing the operating electric field strength by 1.3 – 1.8 times.

Designing features for valve-engine transducers of brushless synchronous and asynchronized machines are described. Global analysis of research results on the transducer models in a MicroCap circuit simulation system is made, recommendations on the simulation system application in both scientific research and educational process given.

Two different techniques of P-Q instantaneous power theory mathematical apparatus modernization for shunt active filters are analyzed. Both techniques are equal in nature while different in implementation. The modernization concepts introduced allow correcting imperfection of the P-Q theory under conditions of unbalanced and non-sinusoidal supply voltage systems.

A computer model building technique for an AC drive system with an autonomous 24-pulse current inverter is introduced. On the basis of the technique developed, a MATLAB variable-frequency drive model capable of working in both quasi-stationary and transient modes is built.

A problem of calculating capacity of cosine capacitors for individual compensation of reactive power in asynchronous electric drives in stationary and transient operation modes is considered. The algorithm introduced employs a high-adequacy mathematical model of asynchronous motor developed on the theory of representing vectors which takes into account both the magnetic core saturation and the current displacement in the rotor bars.

The most deterministic method for calculating the variable component of the magnetic induction on the surface of the rotating rotor of a powerful turbogenerator is presented . It is based on multiposition numerical field calculations of the magnetic field under the rotor rotation and the stator winding currents change taking into account the real geometry of the electromagnetic system and the core saturation. The harmonic analysis of the separated variable component of the magnetic induction is performed at a number of points on the rotor surface in no-load and rated load modes. The conclusion is made that the classical solution of an analogous problem fails to give adequate results because of too rough assumptions. The method introduced is universal for any electric machines, modes of excitation, and geometrical structures of their design.

First results of experimental laboratory-scale reproduction of spheroidal low-energy plasmoids of an artificial ball lightning are given. The data obtained indicate a possibility in principle of reliable generation of such plasmoids in the air atmosphere via the discharge circuit of a high-voltage installation comprising a curved arc discharge channel between a graphite electrode and technical water surface. The artificial 0.3m-diameter ball lightning plasmoid lifetime was less than 0.6 s in the experiments conducted.

A feasibility of reducing a vacuum circuit-breaker actuator armature speed by means of a liquid damper is analyzed. The paper presents comparative calculations of the armature reduced mass motion dynamics with allowance for the hydraulic damper counter forces.

The cores of the Solar System planets and the Sun are magnetized bodies, with the field of S-intensity, molten by the temperature of over million degrees. As similarly charged bodies, they interact with each other via repulsive forces that are considered, in the mechanism of gravitational attraction action, as resultant forces retaining the planets on the orbits at their inertial motion about the Sun.

A brief scientific essay on the history of invention of the main metallurgical technologies of artisan and industrial production of various metals and alloys is presented.

In the paper, a formula is introduced to calculate electric motor supply unit voltage under feeding by a common transformer in the condition of a phase-to-phase short-circuit. The formula is used in every time step of electromechanical state equations integration.

A mathematical model of electromagnetic field for simulating operational modes of traction synchronous motors with permanent magnets intended for electric vehicles is developed. The mathematical model takes into account real-time rotor rotation and allows calculating and analyzing the motor basic running characteristics as time functions.

Comparative electromagnetic calculations of a commercial starter-generator and a nonsalient-pole-stator starter-generator are made. The nonsalient-pole-stator starter-generator magnetic fields are shown in start-up and generator rated conditions. The electromagnetic calculation technique is verified and confirmed with experimentally investigated nonsalient-pole-stator machines of other types.