Contents
Russian Electrical Engineering

Vol. 80, No. 1, 2009

Simultaneous English language translation of the journal is available from Allerton Press, Inc.
Distributed worldwide by Springer. Russian Electrical Engineering ISSN 1068-3712.

Modern DC Electric Drive for Drilling Rigs

B. I. Abramov, B. M. Parfenov, O. I. Kozhakov, M. A. Shalagin,
and I. V. Kolesnikov p. 1  abstract

Variable-Frequency Electric Drive for Drilling Rigs BU-4200/250

B. I. Abramov, A. I. Kogan, B. M. Breslav, V. D. Kochetkov,
O. I. Kozhakov, V. A. Shilenkov, V. K. Vasil’ev, E. V. Kirillov,
and P. R. Lyul’kovich p. 6  abstract

Asynchronous Electric Motors for Variable-Frequency Electric Drives
of Drilling Rigs

B. I. Abramov, L. N. Makarov, B. M. Breslav, V. M. Ponomarev,
and B. M. Parfenov p. 10  abstract

Constructing a Mathematical Model of a Synchronous Motor
with Permanent Magnets on the Rotor

A. I. Korshunov p. 15  abstract

Analysis and Investigation of Size Spectrum of Synchronous Machines Operating
as Wind–Power–Generators in the Range of Rotation Frequencies of 75–300 rpm

V. N. Antipov and Ya. B. Danilevich p. 23  abstract

A Synchronous Reluctance Motor with a Laminated Rotor

B. V. Litvinov and O. B. Davydenko p. 29  abstract

Principles of Designing the Form of a Circuit and Electromagnetic Properties
of Three-Phase Symmetric Fractional Windings of Electrical Machines

V. I. Popov^† p. 33  abstract

Electromagnetic System of Induction Torque Motors with Ball Hollow
Ferromagnetic Rotors

M. L. Kostyrev and Yu. I. Lyutakhin p. 41  abstract

Mathematical Modeling of Induction Heating Units for Moving Round Billets

V. I. Luzgin, A. Yu. Petrov, V. A. Prakht, and F. N. Sarapulov p. 45  abstract

Calculation Errors for the Magnetic Conductivity of an Electromagnet
with Truncated Pyramid-Shaped Poles

O. B. Bul’ p. 50  abstract

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