Simplified steady-state model of an SCR-inverter-based load-commutated commutatorless series motor

Author

Mukherjee, Kaushik ; SenGupta, Sabyasachi ; Bhattacharya, Tapas Kumar ; Chattopadhyay, Ajit K.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Kharagpur, India

Volume

17

Issue

2

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

197

Lastpage

202

Abstract

This paper presents a simplified analytical model of a silicon-controlled-rectifier based, load-commutated inverter driven, commutatorless series motor to predict its speed-current, torque-current and torque-speed characteristics. The model has been formulated, keeping in view the steady state equivalent circuit of a conventional DC series motor. The proposed analytical expressions relating torque and current with speed are found to follow an inverse law and that relating torque and current is found to be parabolic, as is expected in a "series" machine. The drive has been implemented, loaded with a DC generator and experimentally similar characteristics have been obtained, as predicted by the analytical model. The characteristics obtained experimentally are seen to follow the ones, predicted by the analytical model closely

Keywords

AC-DC power convertors; DC-AC power convertors; equivalent circuits; invertors; machine theory; machine windings; rectifying circuits; synchronous motors; thyristor convertors; DC generator load; DC series motor; SCR-inverter-based load-commutated commutatorless series motor; inverse law; speed-current characteristics; steady state equivalent circuit; steady-state model; torque-current characteristics; torque-speed characteristics; Analytical models; Circuits; Commutation; DC motors; Inverters; Steady-state; Synchronous motors; Topology; Torque; Voltage;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/TEC.2002.1009468

Filename

1009468