WEG developed electronically commutated motors (WECM) for heating, ventilation and air conditioning (HVAC) applications in the IEC market at this year’s edition of SPS IPC Drives in Nuremberg (Germany). The energy-efficient permanent magnet motors with aluminium housings in frame size IEC 80 cover the power range from 0.12 W to 1.1 kW, with a choice of rated speeds: 1,500, 1,800 and 3,000 rpm. Integrated electronic speed control enables the drive units (motor and variable speed drive) to achieve market-leading efficiency levels. In addition, the low-noise, compact WECM motors fulfil all relevant IEC and HVAC standards. Easy programming and outstanding efficiency make them a cost-effective solution for pump, fan and ventilator manufacturers.
The European IEC standards 1253:2014, 327:2011 and 640:2011 define steps for boosting the energy efficiency of the overall system, consisting of the motor and the fan. The WECM series, consisting of electric motors with integrated electronic speed control, achieve energy efficiency class IE5 in accordance with IEC 60034-30-1/2, and as a package solution with the impeller, they achieve an efficiency corresponding to the current and future requirements of EU directives for HVAC applications, such as Guideline 2020.
“WEG always strives to be one step ahead of current market requirements. The exterior rotor solutions currently available on the market have a larger diameter than the WECM series, leading to higher airflow losses. The WEG solution is therefore the most efficient on the market”, says Wilmar Henning, Managing Director at WEG in Germany. “Fan and ventilator manufacturers also appreciate the fact that the motor comes from a drive technology specialist instead of a potential competitor.”
The WECM motors provide constant torque over the entire speed range. The speed can be set either directly on the motor or under remote control. On the motor, the speed can be adjusted continuously from 200 to 1,500 or 1,800 rpm, or from 500 to 3,000 rpm, using push-buttons. The direction of rotation can be set to clockwise or anti-clockwise. The voltage, current and frequency can be controlled remotely.