User’s Manual for Advanced Axial Flux Synchronous Motors and Generators
www.emrax.com Version 4.5 / January 2017 38
9. Suitable controllers for EMRAX motors
Controllers have to be bought directly from the producers. The most suitable controllers for EMRAX motors are from the
following companies:
Unitek GmbH, Germany
Emsiso d.o.o., Slovenia
Sevcon Ltd., United Kingdom
Reinhart Motion Systems LLC (RMS), USA
The controller has to be selected according to the Technical Data Table of each motor (high motor current and voltage is very
important). For some EMRAX motor types it is difficult to find a suitable controller even in the global market. It is especially
difficult to find a controller with enough high current, which enables low voltage motors performances listed in the Technical
Ddata Tables. If the motor current is not high enough, then performances are inferior to the performances in the Technical Data
Tables. For this reason two controllers can be used with one motor, therefore the motor can perform with its full performance.
In this case the motor windings are wind in two phase sequences (2xUVW). The customer has to order doubled phase connector
sequences on one motor when placing an order.
EMRAX motors should be used with the sinusoidal commutation controllers. If the controller with trapezoidal commutation is
used, the motor would not work at its best performance, and it would also be louder.
Every motor is tested with the Unitek Bamocar D3 controller before dispatch. Stator windings are tested at 1500 Vac.
In the table below controllers are listed that are recommended for each motor type (performances of the motor should be
calculated according to controller characteristics – current, voltage!):
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