Current waveform optimization for ripple-free output torque of transverse flux reluctance machines

The following publication describes the method used to calculate current waveforms optimized for minimum RMS value of the current and at the same time ripple-free output torque of the transverse flux reluctance machine. Due to the similarities with switched reluctance machines it is also applicable for this type of electric motors. The method described here, requires detailed characteristics of the machine. This algorithm is based on calculating a range of current combinations for every position instance that will result with set torque value, and then choosing the optimal path through all the position instants with help of dynamic programming. Results of the calculations for an example machine are presented and discussed. In the conclusions section some advantages and disadvantages of this algorithm as well as possible improvements, are briefly discussed.