Cleantech Snapshot – Energy efficient industrial motors - India Renewable Energy Consulting – Solar, Biomass, Wind, Cleantech
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EAI presents Cleantech Snapshots: a quick summary of some of the most interesting and innovative areas in clean technology that will drive the sustainability movement in future.

This snapshot focuses on Energy Efficient Industrial Motors. Within this page you will find


  • Industrial motors consume about 40% of all energy used in the industrial sector
  • A majority of motors used by industries today are old and inefficient
  • Just replacing the old motors with new, high efficiency motors could result in energy savings of about 10% overall

Industrial motorIndustrial motor (Image source


  • There are permanent magnets outside and spinning armature inside
  • When electricity is applied in the electromagnet, it creates a magnetic field in the armature that attracts and repels the magnets in the stator
  • The armature spins, running the motor

Types of motors

  • Stepper motor
  • Brushed DC
  • Brushless DC
  • Permanent magnet synchronous
  • Switched reluctance
  • AC induction


  • Provides excellent speed control for acceleration and deceleration
  • Easy to understand design
  • Simple, cheap drive design


  • Textile
  • Marine
  • Petrochemical
  • Food processing
  • Printing machinery
  • Chemical
  • Strapping machinery


  • High maintenance
  • Poor performance at low speeds
  • Poor positioning control

Case studies

  • Energy efficiency in electric motor system. Link
  • Industrial Motor System Optimization Projects in the US: An Impact Study. Link
  • Best Practices in Energy Efficient Industrial Technologies: Motor Systems. Link
  • Learning and Capability Acquisition: A Case Study of the Indian Automobile Industry. Link

See also: an interesting emerging cleantech segment – Building Energy Analytics

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