Radial Flux Motor
Slim & High-Power Density
Radial Flux Motor
Radial flux motors are electric motors where the magnetic field is utilized in the radial direction. This means that the rotor sits either on the inside or the outside of the stator, radially. This is the most common type of motor and can be found in lots of different variants. Typically there is a small air gap between the stator and rotor, and the cooling from the stator is often easier, due to the cylindrical shape, compared to for example axial flux motors.
Alva’s SlimTorq™ radial flux motors are a great example of such a motor. The FiberPrinting™ manufacturing technology makes it possible to make very slim and lightweight motors, with high copper fill factor and non-skewed windings. These two factors, together with the Halbach-array rotors, come together to create a high power density radial flux motor, with excellent torque linearity and precision possibilities.
SlimTorq™ Radial Flux Motors
Alva's standard SlimTorq™ radial flux motors range from the smallest size at 25 mm outer diameter, up to the largest one at 160 mm OD. Most of the variants can be configured in a lightweight version (L) and a more power dense version (M) and all motors can have the cable termination protrude either radially or axially, to cover all kinds of different application types and needs. In addition the motors can be delivered with different winding configurations to match the needed speed, torque and power demands, as well as with different types of temperature and hall sensors.
More information about the different standard motors can be found in Alva’s product catalog or in the product selector which helps sort out the correct motor type based on your requirements.
Custom Radial Flux Motors
The patented FiberPrinting™ manufacturing technique makes it possible to easily adapt designs and create custom radial flux motors. Simply by changing the width, length and winding pattern of the printed stator mats, and additionally, by changing the number of poles and size of the magnets, a completely customized motor is possible. This motor could be optimized in terms of size and weight, or for a specific motor parameter such as motor constant, torque density or low power consumption.
If you’re interested in knowing more about our custom motor possibilities, contact us and we’ll see if it’s possible.
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This table gives a brief insight to the specifications of the standard SlimTorq™ radial flux motor range. The motors can be customized on request and if there are any questions, please contact us for more information.
Radial Flux Motor Applications
Alva’s radial flux motors can be used in a wide range of applications. With their compact shape and high power density they are very suitable for mobile applications which need efficient systems, and with the high pole count and high peak torques they are very suitable for precision systems. Typical applications are:
- Gimbals and other optoelectronic systems
- Humanoids and other robots
- Exoskeletons
- Surgical robots
- Metrology applications
- Semi-conductor equipment
- Defence applications
This is typically 16-20 weeks from when the specification is locked in to when the first motors are delivered.
The standard lead time is 6-8 weeks normally.
These motors are rated at -40 to 80 degrees celsius ambient temperature.
Either a NTC temperature sensor, Hall effect sensors or both can be included.
Yes, there is the possibility to purchase evaluation units which are ready for test without the need to integrate the motor in a test setup or assembly.
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