Rotating Electric Machine Torque Ripple Suppression

The armature winding is divided into multiple independent coil bodies (first coil body, second coil body, third coil body) with different winding directions and connection configurations. Each coil body generates magnetomotive force with specific phase characteristics, and their combined effect cancels out the harmful sixth- and twelfth-order harmonic components that cause torque ripple, while maintaining the beneficial phase difference for field balance.

The patent employs asymmetric winding configurations where different coil bodies have different winding directions (clockwise vs. counter-clockwise) and different connection methods (series vs. parallel). This asymmetry creates magnetomotive forces with different phase shifts, which when combined, selectively cancel the harmful harmonic components while preserving the fundamental electromagnetic field balance.

The patent merges multiple coil bodies into a unified armature winding structure that shares common magnetic poles and stator teeth. The first, second, and third coil bodies are integrated such that they collectively form the complete armature winding, reducing the number of independent components while maintaining the complex phase relationships needed for harmonic cancellation.

The armature winding structure serves multiple functions simultaneously: it generates the fundamental electromagnetic field for motor operation, cancels sixth-order harmonic components through specific phase relationships, and cancels twelfth-order harmonic components through complementary winding configurations. This multi-functionality is achieved within a single integrated winding system rather than requiring separate systems for each function.