EVENTS | 2019-03-01

Calendar

The complete technical calendar from the March 2019 issue of Power Transmission Engineering.

| 2016-05-06

The Reluctance Force We Are Reluctant to Use

Almost daily I’m asked about the switched reluctance motor (SRM) — a motor that was invented more than 100 years ago. But only in the 1980s did it ...

TECHNICAL ARTICLES | 2014-08-01

The Reluctance Motor Springs Forth

There are three major types of reluctance motors: all three reluctance motors are non-permanent magnet, brushless motors. They are synchronous motors with a non-linear relationship between torque and current. The variable-reluctance step and switched-reluctance motors utilize the principle of magnetic attraction by inducing magnet poles within the soft-iron rotor, and by energizing a set of coils wound around stator teeth resident in the laminated stator. These two reluctance motors must be sequentially excited to achieve continuous, steady-state rotation. The design of all reluctance motors requires finite element analysis (FEA) software.

TECHNICAL ARTICLES | 2009-06-01

Reducing Core Loss of Segmented Laminations

The recent trend toward using segmented laminations as a means to increase slot fill and facilitate automated fabrication of electric machines comes with a penalty of increased core loss at the segment joints.