SinuMEC for Escalators

A Sinusoidal Motor Efficiency Controller

SinuMEC, the Sinusoidal Motor Efficiency Controller, is a multifunctional controller for constant speed, variable load AC motors.  SinuMEC is built around power transformers controlled by microprocessor. This patented VVC technology enables dynamic control of the voltage level and power consumption according to the escalator motor load conditions, reducing losses and saving energy. 

Unlike Soft Starters and VSDs that alter sinusoidal waveform or change frequency, generating harmonics and electromagnetic interferences- SinuMEC supplies a pure sinusoidal waveform to the motor and guarantees smooth motor start and energy savings improving power quality and reliability. 

Here is a typical escalator scenario, with energy efficiency provided by SinuMEC:
The fact that even at rush hour where a typical escalator is loaded only about 50%, SinuMEC is able to reduce the voltage and improve motor performance, since it automatically detects the partial load and adjusts the voltage accordingly.  When the number of riders on the escalator decreases, SinuMEC reduces voltages levels even further improving motor performance. In a typical scenario, such as this one, the total energy savings for escalators with SinuMEC can reach between 10–25%.

In a typical escalator application, SinuMEC provides energy savings of 10-25%, an ROI of around two years and overall reduction of 50% on motor Life Cycle Cost (LCC).

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SinuMEC Advantages for Escalators:

• Reliable and Robust
  A heavy-duty motor efficiency controller that can work in harsh electric environments, such as public transportation sites, where accelerating or slowing down electric trains generates severe electrical disturbances
   
• Re-generative Energy
  Uniquely designed to cope with re-generative energy, due to a down-loaded escalator, returning the energy back to the network without any additional filters or bypasses
   
• Improved Power Quality
  SinuMEC has a very low THD and unlike VSDs it does not require any additional filters for suppressing harmonics
   
• Motor Starter
  Smooth motor starting with typical startup current at only 2 x the nominal, thereby reducing electric stress on the motor and electric network;
  Continued monitoring of motor performance improves electric efficiency while motor is running

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SinuMEC Energy Savings for Escalator Motors:

• Reduced direct kWh reading by 10% to 25%
• Reduced network losses by up to 75% (equaling 5% from kW)
• Reduced reactive energy by 50% (which saves around 2% from kW due to capacitors self losses and harmonics increase)
• Reduced motor waste heat; reduces air conditioning costs by up to 20% (equiv. 1%  of kW)

Click here to further understand SinuMEC's benefits.