The use of PM motors in automated processes and production lines is gaining ground globally. This is due to electric motors with permanent magnets offering enhanced performance but with reduced costs, space, maintenance and energy compared to more traditional, asynchronous motors. And the success doesn’t stop there, since PM motors can be optimise even further. Magnet technology plays a crucial role in this; which is precisely why Bakker Magnetics in Science Park Eindhoven is increasingly entering into collaboration with electric-motor developers.
Optimum magnet technology keeps enhancing PM motors in process automation
We produce neodymium magnets of all grades and shapes, of world-class quality without exception
Highly robotized environments, such as a packaging line, without synchronous and linear motors is by now unimaginable. These PM motors provide a very high efficiency rate a high torque, even at fewer revolutions per minute, and compact construction with minimum maintenance requirements. Based on their design principle, PM motors run with the utmost speed and precision, making them ideal for today’s exacting automated processes and production lines.
“Magnet-technology optimisation delivers enhanced motor performance from the outset“
Magnet Technology
PM motor manufacturers are constantly looking to boost efficiency and sustainability. As magnet assemblies are intrinsic to motor design, optimization at this level significantly impacts performance. For servo motors, magnets are mounted on a rotor-bearing system; for linear drives, they are aligned in a line.
“Optimizing magnet technology enhances motor performance right from the start,” explains the engineer, who has extensive experience in the process automation market. “Numerous factors influence how a magnet assembly performs, magnet grade, dimensions, arrangement, angular precision, coatings, and adhesive bonding. These elements collectively affect the PM motor’s performance and reliability. That’s why involving a specialist as early as possible is a smart move.”
Manufacturer and System Partner
Through a joint venture with one of China’s most advanced magnet factories, Bakker Magnetics supplies high-quality neodymium magnets of all grades and geometries to PM motor manufacturers. “These magnets have world-class energy density and temperature resistance,” says the specialist. “However, every shipment is still thoroughly inspected at our quality lab in the Netherlands before delivery.”
While supplying individual magnets is a key part of the business, Bakker Magnetics excels as a system partner. “Where we truly add value is in co-developing and producing complex magnet assemblies tailored to the customer’s needs,” the engineer notes. “It’s in this collaborative design phase that we can make the biggest impact.”
“50 years of knowledge and experience give our clients the lead”
Focus on Application
As a system partner for magnet assemblies, Bakker Magnetics always starts with the end goal: the application. “From day one, the focus is on understanding the operating environment,” the specialist explains. “Will the motor be exposed to moisture, salt, heat, mechanical stress, or vibration? The motor manufacturer sets certain operational and performance parameters, and our job is to ensure the magnet assembly is fully optimized for those conditions.”
The result is a magnet system designed specifically for its use case, delivering optimal motor performance. “This is exactly what clients expect from us,” the engineer adds. “Integrated engineering and production under one roof.”
Latest Innovations
To maintain top-tier magnet and assembly quality, Bakker Magnetics has been developing new materials and technologies in both the Netherlands and China for over 50 years. Among the latest innovations, the specialist highlights: “Together with our Chinese joint venture partner, we’ve developed a new passivation for neodymium magnets. This creates a strong bond between the magnet and the rotor bearing system, delivering a shear strength of 15–20 N/mm², without requiring additional wrapping, even at speeds of 10,000 rpm.”
“These passivated, uncoated magnets also offer excellent corrosion resistance,” adds the engineer. “A 96-hour HAST test under 2.6 bars of pressure and 95% humidity showed material loss of less than 3 mg/cm². That’s exceptional, making them suitable even for humid environments. If higher corrosion resistance is needed, we can apply a High-Performance Coating that withstands 700–1000 hours of salt spray testing. And for applications in extreme temperatures, we offer AH and BH grade neodymium magnets rated up to 220°C and 240°C.”
Smart Magnetic Engineering
PM motors with optimized magnet assemblies are perfectly suited to the demanding, high-precision operations of Industry 4.0. Today’s motor manufacturers and their customers expect nothing less than top performance. “This isn’t a market for standard products,” says the specialist. “Our strength lies in collaborative design, beginning with the application and calculating everything from magnet grade and dimensions to coating, thermal limits, and adhesion.”
Then it’s time to develop, test, and produce the optimal assembly. “It’s always a fascinating challenge,” the engineer reflects. “And it’s incredibly rewarding when clients tell us how much they enjoyed working with us because of our flexibility and open communication. Our continuous innovation and close partnerships are what drive us forward. Because we don’t do it alone, we do it together.”
That’s what we call Smart Magnetic Engineering. By Bakker Magnetics.
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