BS IEC 60034-17:1998

INTRODUCTION
1 Scope
2 Normative references
3 Characteristics of the motor
4 Frequency spectrum of voltage and/or currents
5 Additional losses
6 Torque derating during converter operation
7 Oscillating torques
8 Magnetically excited noise
9 Service life of the insulation system
10 Shelf voltages
11 Maximum safe operating speed
Figure 1 Waveform of phase current iphase in delta
           connection for l-converter supply (idealized example)
Figure 2 Waveform of phase voltage uphase in delta
           connection for U-converter supply with pulse
           frequency fp = 15 x f1 (example)
Figure 3 Influence of converter supply on the losses of a
           cage induction motor (frame size 315 M, design N)
           with rated values of torque and speed
Figure 4 Fundamental voltage U1 as a function of operating
           frequency f1 (see clause 6)
Figure 5 Torque derating factor for cage induction motors
           of design N, IC 0141 (self-circulating cooling)
           for l-converter supply as a function of operating
           frequency f1 (example)
Figure 6 Limiting curve of admissible impulse voltage ULL
           (including voltage reflection and damping) at the
           motor terminals as a function of the rise time ta
Figure 7 Definition of the rise time ta of the voltage at the
           motor terminals

Covers the steady-state operating of cage induction motors within the scope of IEC 60034-12, when fed from converters. Describes the operation over the whole speed setting range, but is not concerned with starting or transient phenomena.