WQuattro Motors Incorporate Hybrid Design

WEG's new WQuattro line of motors employs a hybrid design to achieve high efficiency and is therefore suitable for energy-conscious customers. This environmentally friendly range of motors demands less energy from the grid, according to the company. For the user, 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 and a rotor with an aluminium cage and internal high-energy magnets. This combination makes the WQuattro suitable for direct-online 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. There is no requirement for positioning/speed sensors or special protection relays.

The low bearing temperatures that result from synchronous operation 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. Inverter control also offers the key benefit of multi-motor operation; in other words, several motors can operate in synchronism fed by the same inverter. The WQuattro line can be interchanged with existing installations.

It employs the same frame size for output as standard induction motors and is simple to retrofit into existing applications, according to WEG. The WQuattro line is available in four- and six-pole versions, with frame sizes from 80S to 132S and outputs of 0,37kW up to 7,5kW. The motors benefit from Class F insulation and are suitable for operation on 230/400V, 400/690V or 525V supplies.

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