E.C Condenser Motors
Electronically commutated motors (ECM) are brushless direct current (DC) motors. They are incredibly efficient, quiet, and reliable. Electronically controlled motors are electric motors which have permanent magnets on the rotor and use electronics to control the voltage and current applied to the motor. An electronically controlled motor works through the interaction of two magnetic fields pushing on each other. They use permanent magnets to create the rotor field and a series of coils controlled by an electronic controller to create the stator field.
Because EC motors have electronics controlling the stator and do not need to waste power inducing the rotor field, they offer more efficient performance and control and run cooler than induction motors. EC motors are used in applications where high motor efficiency, reliability, and control is desired.
Reach-in Cases
This application type represents the largest portion of the installations we support. Considerations on installation best practices are always paramount in our planning. Our process begins with proper motor selection and bracket type to assure suitable performance. With the vast array of case types evident within reach- ins, bunkers, islands and deli serve-over (as examples) we leverage an expanding internal proprietary installation database that was developed from retrofit experience.
Condensing Units
Many have not considered a retrofit upgrade within the condensing unit application. Presently, there are very few suppliers who can address this request. Typically defined as the most challenging retrofit, most suppliers are not in position to address potential housing fabrication requirements, CFM air flow testing and more to assure a successful project. With EC motors expanding their size offerings up to as much as a 4HP rating, we see tremendous opportunity for our clients to benefit from this excellent motor technology.
From most energy management companies, excluding us, this application was considered the exclusive domain of VFD (variable frequency drive) motor technology. Pulling from our experience, condensing applications are now benefiting from a more reliable solution. Give us a call, let’s discuss if this application should be considered within your site.
Walk-In Cases
Walk-in retrofit motor applications within supermarkets are now a standard discussion within all motor retrofit programs. Even though the average site motor counts are significantly less than the reach-in applications, these motors typically draw at least twice the wattage and should not be overlooked within the project scope development process. As the primary motor type used within Convenience Store, Pharmacy and Cold Food Storage operations, updating to EC motor technology is considered one of the primary energy initiatives. The walk-in application offers a secondary means of attaining energy savings. Most EC motors can be provided with a two-speed operational mode. In all our applications, we program our motors for two speed operation (high & low settings) in preparation for use with our evaporator fan control technology. By combining evaporator fan controls with the EC walk-in motor, our clients attain Significant “additional” energy savings Within the walk in applications.
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AC Fans: Lowest initial cost but higher recurring operating costs and more expensive in the long run. Inefficient and limited speed control that produces a loud hum, especially at lower speeds. Biggest benefit is convenience as they either can be plugged into standard power outlets or hardwired into household electrics.
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DC Fans: Higher initial cost than AC fans but more energy-efficient and a better long-term investment. Better speed control. Require an external DC power supply.
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EC Fans: Highest initial cost but combine the best features of AC and DC fans—the convenience of running on standard household AC power with great energy-efficiency and long-term cost-effectiveness.
