The new MCA and MQA series of asynchronous servo motors manufactured by Lenze deliver more power than comparable motors as a result of a revised cooling concept. A common mechanical design with three different forced ventilation options can deliver up to 200% more power at a given inertia. Combined with other state-of-the-art features such as insulated bearings and electronic nameplates, this makes the MCA and MQA motors an ideal choice for economy and long life.
MCA and MQA motors are available with rated torques up to 125Nm and a massive reserve for peak torques up to 500Nm. The high power density is a result of the forced ventilation design. At the lowest level are IP54 motors with conventional external forced cooling. Achieving an increase of about 10% at the expense of reduced enclosure to IP23 is done with a radial blower that forces air through internal channels in the motor. A further increase of about 25% is available through a larger blower mounted radially.
In fact all three versions deliver high powers and torques for their size, but the radially blown models are exceptional in combining high power and high torque with low inertia. Compared to other motors of a similar inertia, these motors deliver 2 to 3 times more power. There is space saving too - these motors give 20 to 30% more power for a given volume. The result is better dynamics on high speed machinery from the increased ability to inertia match together with savings in cost and space.
The MCA and MQA motors come with a wide and flexible range of features. Insulated bearings increase motor life as they prevent electro-erosion damage incurred by hazardous bearing currents – in turn a result of the high switching frequency of servo drives. Also standard is a choice between resolvers, incremental and absolute encoders. Each motor can accept a choice of two sizes of spring applied brakes for emergency stop and holding duties. An electronic nameplate built into the feedback connector allows exact matching to Lenze drives and optimum performance. The connectors themselves are available in new SpeedTec design which reduces machine build time.
These new Lenze asynchronous servo motors deliver market leading performance in a package that is compact and economical. They are ideally matched to Lenze ECS, 9300 and 9400 servo drives for powers up to 38kW.