ABB will be featuring its high-efficiency NEMA motors solutions at Turbomachinery & Pump Symposia on September 25 – 28 in Houston. Attendees are invited to visit Booth #2835 to learn from experts how ABB’s innovative products and services provide essential solutions for energy saving, facility comfort, productivity and more. ABB’s Global Segment Manager Todd Huston and Account Manager Kirk Franz will be available at the booth to discuss the products and the product benefits.

ZF has developed an electric motor which does not require magnets. In contrast to the magnet-free concepts of so-called separately excited synchronous motors (SESM) already available today, ZF’s I2SM (In-Rotor Inductive-Excited Synchronous Motor) transmits the energy for the magnetic field via an inductive exciter inside the rotor shaft. This makes the motor uniquely compact with maximum power and torque density.

Electric drives often need to operate under high voltages up to 800 V to provide more power and higher speeds. However, the risk of partial discharges increases at these voltages. In combination with high operating temperatures, these can locally damage the insulation and lead to machine failure. However, a good impregnation ensures not only electric insulation but also copper bonding, to mechanically strengthen the electric motor, and air gap filling, to allow a better heat transfer. 

In everyday life and in the technical fields we often discover that certain decisions are based on “scientific data” when, in fact, they are often founded on historic conclusions that have not been challenged or re-evaluated in a long time. One such common myth is that for a stable and well-tuned drive you should match the motor’s inertia to the load inertia, which is typically done using a gearbox. Two factors lead to that conclusion: a. there is an optimization formula using the time constant of the motor and the load torque that shows that the best acceleration will be achieved if the reflected load inertia matches the rotor inertia; and b. a PID controller, which was commonly used when electric servos entered the marketplace, tend to perform best and appear to be most stable when the inertia are close or matched.

Nidec Corporation has acquired full ownership of TAR, LLC d/b/a Houma Armature Works, a privately- owned US company (“Houma”).  As a result of the transaction, Houma became a consolidated subsidiary of Nidec.

Visitors to EASA in June will get a chance to see some of the highest efficiency electric motors available on the market when they stop by the Nidec Motor Corporation Booth (#613). Nidec’s “Super Premium” and above variable frequency drive (VFD) motors and all-in-one, integrated motors and controls are leading the industry with efficiency ratings of IE 4 and IE 5 for remarkable energy savings compared to traditional single speed motors.  

SEW-Eurodrive is expanding its comprehensive portfolio to include new motors for purely inverter operation. The synchronous motors of the DR2C.. series satisfy the highest standard-based efficiency class IE5 for adjustable-speed electric motors. This makes them yet another sustainable and energy-saving motor variant. 

ABB recently announced it has completed its acquisition of the Siemens low voltage NEMA motor business. The transaction was originally announced August 11, 2022, and financial terms of the transaction were not disclosed. The business employs around 600 people and generated revenues of approximately $63 million in 2021.

Portescap announces the release of the 45ECF brushless DC flat slotted motor, the latest addition to join our flat motor portfolio. The 45ECF features a performance optimized design that utilizes an outer rotor configuration with an overall diameter of 43.2 mm and a body length of only 22.5 mm. The motor features hall sensors to easily control speed and torque and can be provided sensorless based on application requirements. Additionally, the motor can be used in combination with existing gearbox designs to provide high output torque at required operational speeds.

Unlike HVAC applications, servomotors are not normally operated at the same speed or torque for extended periods, thus the overall efficiency of a servomotor is not easily given a single numeric value. The efficiency varies greatly with the application, and thus different applications favor different types of servomotors.