Brushless DC motor – pushing it to the limit

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When prototyping for applications with extreme requirements for brushless DC motors, fast condition monitoring is critical.

Motor applications with limited space available and comparatively large power requirements can push a motor very close to burning out. In theory, it is possible to use temperature calculations for the motor winding with the help of thermal resistance rating from the motor data sheets, ambient temperatures, heat sinking details and housing characteristics. This is always considered first and then tolerances and safety margins are considered. Following this thermal modelling software and imaging can be evaluated. However some applications push a motor so close to the edge, that only real product prototype testing can be relied upon. Simply installing motors and testing how hard you can push them can also be a costly exercise and does not give enough reliable data. Actual winding temperature sensing on the motor is a solution maxon motor offer for these extreme cases. By inserting sensors through ports in the magnetic return stack and in direct contact with the winding, maxon motor can give customers a device that monitors winding temperatures without the thermal time constant delays experienced when measuring winding resistance and using housing thermal time constants.

For more information please contact maxon motor Australia tel. +61 2 9457 7477.

Brushless flat DC motors going to Mars.

BL flat motors in 2020 rover

Brushless motors from maxon motor are again being used by NASA for the Mars 2020 rover.

For critical tasks you need the best quality. The Jet Propulsion Laboratory have selected nine brushless flat motors from maxon motor for the rover which they intend will take soil samples and seal them in containers for future transport to Earth. Various motion applications are performed. Sample tube holding, the robotic arm, container handling, sample gathering and container sealing. 32mm diameter and 20mm diameter flat brushless motors have been combined with heavy duty 22mm planetary gearheads and modified specifically for the Mars mission in close collaboration with JPL for the difficult conditions experienced with descent, landing, sandstorms and the -130 to +70 degree temperatures.

For information on DC motors and gearheads used in applications operating in harsh environments please contact maxon motor Australia tel. +61 2 9457 7477.

Mechatronic drive system in elevator doors

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Maxon brushless DC motors and encoders drive lift doors open and closed.

Schindler is a well-known manufacturer of elevators and lifts, moving more than one billion people every day. When we take the lift, we press the button, the cab arrives, we enter and disembark at the desired floor. What is a simple event has alot of technology in the undertaking – in the elevator shaft, motor chamber, control box and in the lift compartment itself.

A motor installed in the cab opens and closes both the doors of the cab and the doors at each particular floor. The requirements of the motor are very specific: small yet powerful, reliable, energy-saving and intelligent. Maxon developed two Door Drives alongside Schindler, using a brushless DC motor with a diameter of 90 millimeters, a MILE encoder combined with the motor and a customised EPOS2 positioning controller. With two power levels, the more powerful version uses a belt drive and is able to move doors weighing up to 400 kilograms. The smaller and latest version is more compact and moves doors weighing up to 120 kilograms.

Encased in a housing, the Door Drive can be mounted directly onto the lift cab. And this is where its real work starts. The ability to adapt to the many different types of elevators, with differently sized cabs, different materials and, depending on the country, different safety standards. After a calibration procedure, the controller of the Door Drive detects the size and weight of the doors, autonomously calculates the optimal parameters corrects them if necessary and drives the doors open and closed.

For more information on applications where DC motor technology needs to be powerful, compact, reliable and intelligent please contact maxon motor Australia on tel. 61 2 9457 7477.

mechatronic drive DC motors elevator doors

Mechatronic system: The drive solution for elevator doors consists of a brushless flat DC motor (90 mm diameter), an integrated MILE encoder and a customer-specific positioning controller based on the EPOS 2 series. © maxon motor

New DC motor and drive catalogue

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maxon motor have released the digital edition of the new 2017 / 2018 catalogue. Answering the how to’s of motor control it contains valuable motor and motor control reference material.

Containing 480 pages of motor, gearhead and controller information and useful educational material including a technology breakdown, calculation examples and conversion tables the manual is available now for downloading or online reading. New technology listed includes the customisable stainless steel DC motors in 6mm and 8mm. Information on the new very high speed 13mm BLDC brushless DC motor technology that can be sterilised for medical applications. Ultra-small diameter planetary gearing and high speed gearbox designs and the very latest in motion control, explaining modular decentralised DC motor position controllers and high power density DC servo amplifiers.

The link directly to this free information is http://epaper.maxonmotor.com.au or contact our Sydney, Australia office on +61 2 9457 7477.

More choice from maxon: sterilisable brushless DC motors

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Maxon now offer more sizes in their sterilisable range of brushless DC motors, gearheads and an all new encoder.

Now available in a 13mm diameter is the brushless DC motor (ECX SPEED range) with accompanying planetary gearheads (GPX 13 SPEED) and the first of its kind sterilisable Encoder (ENX 13 EASY INT). All fully configurable, sterilisable and optimised for high speeds and low vibration output, making them perfect for demanding speed and positioning control tasks in surgical applications.

A stand-out feature of the sterilisable encoder is the chip used for generating the commutation signals in the Hall sensor version. When coupled with the brushless DC motor ECX SPEED 13 it facilitates extremely precise commutation and reduces heat. The encoder can be integrated within the motor to optimise costs and assists in applications with tight space restrictions. The DC motor combination can be configured online and ready to ship in 11 working days.

For more information please contact maxon motor Australia tel. +61 2 9457 7477.

 

New! Maxon release the first sterilisable encoder.

 

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maxon motor have unveiled the first sterilisable encoder for brushless DC motors. This will create many opportunities for advances in medical technology.

The first steam sterilisable encoder has been released by maxon motor. The ENX EASY is available in two versions, as an incremental (1024 CPT) and an absolute version (4096 CPT). It can be integrated into suitable motors without increasing the length. The encoder has allowed maxon to create the first sterilisable drive system with brushless DC motor, gearhead and integrated encoder.

Ideal for demanding medical / surgical applications where speed and positioning control tasks are performed. Available with ball bearings or in a ceramic version. The encoder delivers high speeds, extremely precise commutation, low vibration and reduction of heat build-up. To optimise costs and space restrictions, the encoder is integrated in the brushless DC motor.

For more information please contact maxon motor Australia tel. +61 2 9457 7477.

Customer alert: discontinuation of DC motor EC25 High Speed

 

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The brushless DC motor EC25 from maxon is being discontinued.

Developed for high-speed spindle applications, the EC25 High Speed brushless DC motor is being phased out and replaced with the ECX High Speed series of DC motors. For example, the ECX SPEED 22 L performs almost identical to that of the EC25, but with a 3mm smaller diameter and offered at a significantly lower cost. The last orders will be taken October 31, 2017 with final deliveries 31 December 2017.

For more information please contact maxon motor Australia tel. +61 2 9457 7477.

Maxon offer a more affordable and smaller brushless DC motor – the ECX SPEED 22 mm diameter is an alternative the EC25 © maxon motor

16mm brushless DC motors now available online

The 16mm diameter brushless DC motors (or ECX 16 SPEED) have been optimised for high speeds (up to 120,000 rpm)

All maxon 16mm brushless DC motors are available to order online & ready in 11 working days.

The 16mm diameter brushless DC motors (or ECX 16 SPEED) have been optimised for high speeds (up to 120,000 rpm). Depending on the application requirements, there are various versions of the DC motors available: Standard, High Power, sterilisable (up to 2000 cycles), sensorless or with Hall sensors, or with ceramic bearings for high speeds. The 16mm dia. brushless DC motors in Standard and High Power versions were released in November 2016, representing more torque and better efficiency.

Configurable online, manufactured in 11 days and with detailed 3D product data available call maxon motor Australia on tel. +61 2 9457 7477.

22mm High Speed Brushless DC gearmotor in DRS system

When you only have 0.2seconds to move your load maxon motors and gearheads are required.

In 2016 the Academic Motor Sports Club Zurich set a world record for electrically powered vehicles by accelerating to 100km/h in 1.513s. Maxon motors are used in the vital race car Drag Reduction System (DRS). The maxon 22mm Brushless DC motor and high powered 22mm planetary gearhead drive rear airfoil. Rotating 165˚ in 0.2 seconds means the gearhead had to withstand very high forces.

To read the full article please visit the applications area of our website. Or contact our Australian office for application assistance. Ph: +61 2 9457 7477.

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Pictured left maxon EC22 – The EC motors have excellent torque characteristics, high power, and a wide speed range of up to 100,000 rpm.

Pictured right maxon GP22 HP – Planetary gearheads are suitable for transmitting high torques of up to 120 Nm.

 

IP rated brushed and brushless DC motors

IP rated brushed brushless DC motor

maxon motor planetary gearheads fitted with rubber sealed bearings when an IP rated motor or motor and encoder combination is selected.

maxon standard brushed motors of 50mm 200W and 65mm 250W sizes in 12V, 24V and 48V have the option of either an industrial housing to seal the unit in harsh environments or a 500 and 1000cpt 3 channel digital encoder in a sealed industrial housing. This standard option is also available on 45mm 250W brushless motors and 60mm 400W brushless DC motors. All motors have an extended range of planetary gearhead options which when ordered in conjunction with a sealed motor are automatically upgraded and supplied with sealed bearing assemblies. The motors do not require airflow and as such also have been supplied with custom coatings to suit specific environmental conditions. Sealed motor housings are available with axial or radial cable exits and custom uniform diameter designs.

Contact maxon motor Australia on Ph: +61 2 9457 7477 for application assistance.