Simulation modeling of hybrid regenerative braking method for variable frequency asynchronous motors in underground electrical networks

In event of a fault, mining equipment fitted with DC drives cuts off for a short or long time but rotors continue rotating for a certain period. The rotation speed is governed by the damping ratio of counter EMF generated by the dead motor. Inertia braking is characterized as the «free path» mode. This study aims at development and simulation testing of hybrid braking of asynchronous motors in underground hybrid electrical networks by means of braking using special brake resistor and by means of DC supply to the motor stator circuit from the DC circuit of the frequency converter. The accomplished research made it possible to propose engineering solutions on the structure and functions of a special device for the dynamic braking of a motor supplied by the frequency converter. The device ensures shutdown or deceleration via resistive braking and DC supply directly in stator circuit of asynchronous motor. As a result, it becomes possible to implement effective braking and damping of counter EMF of the motor, as well as to decrease the current amplitude in the circuits of the connection and metering filter of the shutoff protection device (SPD).

Petrov V. L., Pichuev A. V. Simulation modeling of hybrid regenerative braking method for variable frequency asynchronous motors in underground electrical networks. MIAB. Mining Inf. Anal. Bull. 2024;(8):153-162. [In Russ]. DOI: 10.25018/0236_1493_2024_ 8_0_153.

V.L. Petrov¹, Dr. Sci. (Eng.), Professor, Vice-Rector, e-mail petrovv@misis.ru, Scopus ID 8919065900, ORCID ID: 0000-0002-6474-5349,
A.V. Pichuev¹, Dr. Sci. (Eng.), Assistant Professor, e-mail allexstone@mail.ru, Scopus ID 57209798580, ORCID ID: 0000-0001-7457-5702,
¹ NUST MISIS, 119049, Moscow, Russia.

V.L. Petrov, e-mail: e-mail petrovv@misis.ru.

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