safety functions such as Safe Torque Off (STO) or Safe Torque Off over CIP (Common Industrial Protocol) ensure machine and personal protection. In the future, the system will be expanded to include additional encoderless safety functions such as SLS and the PROFISAFE & FSoE protocols.
The Motor Drive System is also impressive when it comes to sustainability: the combination of motor, gearbox and drive reduces motor losses by up to 60%. The integrated energy recovery unit in the motec automatically feeds
enze is setting new standards in decentralized drive technology with the IE5/IE6 Motor Drive System. The
focus is on the i650 motec inverter drive which, in combination with the m550/m650 synchronous motor, offers a powerful and energy-efficient solution for demanding applications. Lenze presented the motor drive system from November 25 to 27, 2025 at the SPS trade fair in Nuremberg. The i650 motec impresses with its integrated Logic PLC and a positioning function that enables independent motion control without a higher- level controller. This makes the system suitable for various applications such as conveyor drives, winding drives and pump applications.
High performance is also important to customers: “We promise up to 300% overload torque from standstill and we deliver. Starting from standstill to full load is possible without any problems and without motor feedback,” emphasizes Klaus Dierkes, product manager Electromechanics. This means that the system can be designed more precisely for continuous operation, as it is not oversized, and then immediately delivers the required power. Lenze offers the new m550 synchronous
motor in power ratings of 0.25 - 11 kW and the m650 for dynamic applications in 0.75 - 22 kW. Both can be seamlessly combined with gearboxes from the Lenze modular system. There is a choice of helical, angular or bevel
gearboxes for a wide range of requirements. The first test customers worked with
Lenze’s new EASY System Designer for the design. The result: a precisely dimensioned drive solution through to an energy-efficient machine design. The web-based engineering assistant shows the energy consumption of the respective application and drive components.
Thanks to precise control of the m550/m650 synchronous motor, encoderless positioning is possible with the i650 motec. The integrated
excess energy back into the mains – without any additional hardware. Machine operators also receive high-quality information from the machine sensors via the IO-Link interface and benefit from increased system transparency. The new Motor Drive System is extremely
resource-efficient. The sensorless feedback means a budget-friendly chain reaction on the hardware side: no expensive feedback system, more compact drive, no expensive cables. Another effect: mounting and installation are quick and safe. If the highly efficient motor is controlled with the decentralized i550 or i650 motec drive, there is no need for even more hardware, as brake resistors are not required. The i500 cabinet inverters can also exchange
excess energy via the DC network and make it available to other axes. Lenze has a new solution for the positioning of goods, which is often necessary in conveyor technology: “We use the SLSM algorithm (Sensorless Synchronous Motor Control) in the drive. This enables us to achieve the performance of a closed control loop without a motor feedback system and cabling. The result is sensorless and precise positioning,” concludes Klaus Dierkes.
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