I.S. CLC TS 60034-25:2005

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 System characteristics
  4.1 General
  4.2 System information
  4.3 Torque/speed considerations
      4.3.1 General
      4.3.2 Torque/speed capability
      4.3.3 Voltage/speed characteristics
      4.3.4 Limiting factors on torque/speed capability
      4.3.5 Resonant speed bands
      4.3.6 Duty cycles
  4.4 Converter control types
      4.4.1 General
      4.4.2 Converter type considerations
  4.5 Converter output voltage generation
      4.5.1 Pulse Width Modulation (PWM)
      4.5.2 Hysteresis (sliding mode)
      4.5.3 Influence of switching frequency
      4.5.4 Multi-level converters
  4.6 Motor requirements
5 Losses and their effects
  5.1 General
  5.2 Losses in motors supplied from voltage-source
      converters
  5.3 Location of the extra losses and ways to reduce
      them
  5.4 Converter features to reduce the motor losses
  5.5 Temperature and life expectancy
  5.6 Determination of motor efficiency
6 Noise, vibration and oscillating torques
  6.1 Noise and vibration in an induction motor supplied
      from a converter
      6.1.1 General
      6.1.2 Changes in noise emission due to changes in
            speed
      6.1.3 Magnetically excited noise
      6.1.4 Torsional oscillation
  6.2 Sound power level determination and limits
      6.2.1 Methods of measurement
      6.2.2 Test conditions
      6.2.3 Sound power level limits
  6.3 Vibration level determination and limits
      6.3.1 Method of measurement
      6.3.2 Test conditions
      6.3.3 Vibration level limits
7 Motor insulation electrical stresses
  7.1 General
  7.2 Causes
  7.3 Winding electrical stress
  7.4 Insulation stress limitation
  7.5 Responsibilities
  7.6 Converter characteristics
  7.7 Methods of reduction of voltage stress
  7.8 Motor choice
8 Bearing currents
  8.1 Sources of bearing currents in converter-fed
      motors
      8.1.1 General
      8.1.2 Magnetic asymmetry
      8.1.3 Electrostatic buildup
      8.1.4 High frequency voltages
  8.2 Generation of high frequency bearing currents
      8.2.1 General
      8.2.2 Circulating current
      8.2.3 Shaft grounding current
      8.2.4 Capacitive discharge current
  8.3 Common-mode circuit
      8.3.1 General
      8.3.2 System common-mode current flow
  8.4 Stray capacitances
      8.4.1 General
      8.4.2 Major component of capacitance
      8.4.3 Other capacitances
  8.5 Consequences of excessive bearing currents
  8.6 Preventing high frequency bearing current damage
      8.6.1 Basic approaches
      8.6.2 Other preventive measures
9 Installation
  9.1 Grounding, bonding and cabling
      9.1.1 General
      9.1.2 Grounding
      9.1.3 Bonding of motors
      9.1.4 Motor power cables
  9.2 Reactors and filters
      9.2.1 General
      9.2.2 Output reactors
      9.2.3 Voltage limiting filter (dv/dt filter)
      9.2.4 Sinusoidal filter
      9.2.5 Motor termination unit
Annex A (informative) Converter output spectra
Annex ZA (normative) Normative references to international
                       publications with their corresponding
                       European publications
Bibliography

Describes the design features and performance characteristics of polyphase cage induction motors specifically designed for use on voltage source converter supplies up to 1000 V.