Impact of rotor bar bridges in torque development in integral horsepower machines in PWM inverter environments

Author

Penrose, Howard W. ; Zych, Zachary

Author_Institution

Eng. & Reliability Services, Dreisilker Electr. Motors, Inc., Glen Ellyn, IL, USA

fYear

2011

fDate

5-8 June 2011

Firstpage

32

Lastpage

35

Abstract

The impact of rotor bar bridges in closed-slot induction motor rotors has been simulated using Finite Element Analysis (FEA) and single phase equivalent circuit methods in 60 Hz sinusoidal environments. In this paper we will discuss a study on a 455HP, 90Hz, 380 Vac machine utilizing a rotor with a deep bridge, then the impact on output torque once the diameter of the rotor was turned down, reducing the bridge depth. The research performed allowed for optimizing optimal bridge depth and air gap sizing based upon machine design for peak torque development.

Keywords

PWM invertors; air gaps; equivalent circuits; finite element analysis; induction motors; rotors; PWM inverter environments; closed-slot induction motor rotors; finite element analysis; frequency 90 Hz; integral horsepower machines; power 455 hp; rotor bar bridges; single phase equivalent circuit methods; torque development; voltage 380 V; Bridge circuits; Bridges; Induction motors; Reactive power; Rotors; Temperature; Torque; air gap; inverter; motor design; rotor bar; torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation Conference (EIC), 2011

Conference_Location

Annapolis, MD

ISSN

pending

Print_ISBN

978-1-4577-0278-5

Electronic_ISBN

pending

Type

conf

DOI

10.1109/EIC.2011.5996110

Filename

5996110