Lenze presented its new compact IE5/IE7 motor drive system at SPS in Nuremberg. The drive system operates sensorless even in dynamic applications. The combination consists of the m550/m650 motor, the g500 gearbox and the latest generation i550 and i650 frequency converters. The first synchronous motor is as easy to handle as an asynchronous motor. Thanks to its innovative design, it achieves energy efficiency classes IE5 and IE7. Motor losses can be reduced by up to 60%, which significantly reduces energy consumption and CO2 emissions. Performance is also impressive: an overload torque of 300% accelerates the engine from standstill to full load.
Klaus Dierkes, Product Manager Electromechanics at Lenze, is pleased with the good feedback from test customers in the intralogistics industry. “Our customers are primarily interested in reducing energy costs and CO2 emissions. This is a very important issue especially in logistics, and with the m550 we can achieve this. In fact, we found that the new motor drive allows us to reduce engine losses by up to 60%.” This is made possible by a newly designed permanent magnet synchronous motor. What’s more, the motors are the same size or even smaller than comparable IE2/IE3 motors.
Performance that convinces: 300% overload torque
High performance is also important to our customers. “We promise and maintain 300% overload torque from standstill. Full load from standstill is easily achieved. The beverage industry, the textile industry and above all internal logistics benefit from this. This means that the system can be dimensioned more precisely for continuous operation, as it is not too large, and the required power can be delivered instantly.” Lenze offers the new m550 synchronous motor in the power range from 0.25 to 11 kW and the m650 for more dynamic applications from 0.75 to 22 kW. Both can be seamlessly combined with gearboxes from the Lenze modular system. Helical, angular and bevel gears cover a wide range of requirements.
During the design phase, the first test customers worked with the new Lenze System Designer. Result: The solution The new motor drive system is also very resource efficient. Sensorless feedback means a cost-effective chain reaction on the hardware side: no encoders, expensive feedback systems or expensive cables are needed. Another effect is that assembly and installation are quick and safe. This contributes to system reliability.
If the motors are controlled by a decentralized frequency inverter i550 or i650 motec, the burden on the hardware is even less, since no braking resistors are required. The regenerative unit integrated in the motec feeds back the braking energy to the network. The i500 series frequency inverters can also exchange surplus energy via the DC network, making it available for other axes.
Lenze offers a new solution for goods positioning, which is often required in conveyor technology: “We use SLSM (Sensorless Synchronous Motor Control) algorithms in the frequency converter to achieve closed-loop performance without motor feedback systems or wiring. This makes it possible to achieve precise positioning without sensors.”