WQuattro hybrid motors offer higher energy efficiency

Paul Boughton
WEG's new WQuattro super premium efficiency motors employ a hybrid design to achieve an efficiency that is claimed to be the highest in the market, exceeding the requirements of the impending IE4 Super Premium Efficiency classification across the entire output range.
WQuattro motors are environmentally-friendly motors that consume less energy due to their highly efficient performance and zero energy (joule) losses from the rotor. For users, this translates into lower total cost of ownership, a reduction in CO2 emissions and a faster return on investment.
The WQuattro is a hybrid motor integrating a conventional three-phase distributed winding, a rotor with an aluminium cage and internal high-energy magnets. This makes the WQuattro suitable for direct-on-line starting and acceleration up to synchronous speed. With this type of operation the motor speed does not vary with load, despite overload variations or cases of voltage drop, as long as the mains frequency is kept constant. In addition, there is no requirement for positioning/speed sensors or special protection relays, and the low bearing temperatures also ensure longer life and reduced maintenance for the motors.
Where the speed of the motor needs to be adjustable, the WQuattro can be used with inverters (V/F and Vector types), offering an extended speed range with constant torque. In addition, inverter control also offers the key benefit of multi-motor operation in which several motors are operated in synchronism by the same inverter.
Importantly, the WQuattro line offers interchangeability with existing installations. The motors employ the same frame size for the rated output as standard induction motors, so the motors are easy to retrofit into existing applications.
The WQuattro line is available in four- and six-pole versions, with frame sizes from 80 to 132S and outputs of 0.37kW up to 7.5kW. The motors benefit from class F insulation and are suitable for operation on 230/400, 400/690 or 525V supplies.
For more information, visit www.weg.net

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