Table of Contents

1 Overview
1.1 Scope
1.2 Purpose
1.3 Limitations
2 References
3 Problem description
4 Synchronous motor equivalent circuit
5 Calculation of pulsating and average
    electromagnetic torque
6 Mechanical measurement of electromagnetic air
    gap torque
6.1 Measurement of angular acceleration
6.2 Measurement of rotational velocity
6.3 Torque shaft method
7 Electrical methods for measuring electromagnetic
    air gap torque
7.1 Search coil method
7.2 Measurement of electromagnetic torque using
      terminal voltage and current sensing
7.3 Measurement of electromagnetic torque using
      input power sensing
7.4 Measurement of torque using electrical power
      input and speed sensing
Annex A (informative) Sample calculation of per unit
                      air gap torque
Annex B (informative) Operational reactances
Annex C (informative) Bibliography

Abstract

Defines a uniform methods for measuring and calculating torque pulsations that occur during starting of synchronous motors. Applicable to all types of excited synchronous motors, as well as solid or laminated, salient or nonsalient machines, including nonexcited synchronous-reluctance motors.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Supersedes	IEEE DRAFT 1255 : 1999