Brushless DC motors that operate at extremely high temperatures.

A brushless DC motor for operation in the path of hot air at 180˚C requires more than special lubrication.

376mNm and 1700rpm on 24V. They seem like easy requirements for a brushless DC motor to achieve. But at 180˚C continuous and 200˚C intermittent? That is a little more difficult. The engineers at maxon motor are used to requests for motors that can operate in the high temperature environments of Australia. Particularly outdoor and enclosed environments like solar pumping, traffic control and agriculture where ambient temperatures in the enclosure can soar well above 60˚C. For this requirement the only modification is typically to use a thicker, high temperature lubrication for the ball bearings. In fact, most maxon brushless DC motors are rated from -40˚C to +100˚C as standard. For 200˚C motors this is an entirely different ballpark. The design engineers for the motor must carefully design each component with a matching thermal expansion. Extensive finite element analysis, vigorous testing and physical inspection must then take place on every single assembly process. Plastics must be avoided, windings need encapsulation, cable insulation must be specifically selected for each environment, magnets need to be a carefully tested grade of Samarium-cobalt rare earth material that is sintered and again encapsulated. The entire construction is then double pass continuous flow laser welded….and tested again, and again.

Pictured here is an example of such a motor that was recently delivered to a customer with the aforementioned features.


Contact maxon motor Australia for engineering assistance with your extreme environment application. Sydney office Ph. +61 2 9476 4777.

To view the original press release please click here


About maxon motor Australia

maxon motor is the world’s leading supplier of high-precision drive systems. More than 40 years’ experience, constant innovation, top-quality products and competent customer service make maxon motor a reliable partner in the drive technology sector. We are driven by your specific requirements. The product range incorporated in the modular system is comprehensive: Brushed and Brushless DC motors with the unique ironless maxon winding Flat motors with iron cores Planetary gears, spur gears and special gears Sensors (encoders, DC tachos, resolvers) Servo amplifiers, position controllers and control electronics High-tech CIM and MIM components Customer specific drive solutions. maxon motor is a Swiss company headquartered in Sachseln (Central Switzerland) that employs more than 2000 staff worldwide. With 14 sales companies based in over 30 countries, sales partners in another 10 countries and with six production sites, maxon motor are able to provide locally-based and competent customer service. maxon motor helps provide innovative solutions at competitive prices for numerous applications in various markets, such as Medical technology, Industrial automation and robotics, Aerospace industry, Automotive industry, Communication, Consumer applications, Inspection and Instrumentation and Safety engineering. maxon motor Australia is based in Mt Kuring-Gai NSW and our staff will be happy to help you with all your DC motor and technical enquiries.

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