The benefit of ThinGap slotless and ironless motor designs is that they eliminate cogging torque. Their uniquely constructed phase windings produce a balanced phase amplitude and angle relationships between phases. In addition, due to these patented unique design features, ThinGap motors exhibit torque versus angle curves with good phase balance resulting in less than 1% harmonic distortion minimizing torque ripple.  ThinGap motors also produce linear torque output with current which ensures minimum torque ripple even at high load conditions. It doesn’t get any smoother than this!

The blue line indicates the type of torque ripple that will be induced as the motor is run with a sinusoidal motor driver.