Electric motors having EMI reducing circuits and methods therefor

A circuit for reducing electromagnetic interference (EMI) emitted by an electric motor comprising:

• a field stack;
• a brush assembly adapted to deliver electrical power to said field stack;
• motor field coils;
• a delta capacitor network comprising three capacitors;
• and
• conductive leads electrically interconnecting two leads of said delta capacitor network with said motor field coils and a third lead of said delta capacitor network with said brush assembly, wherein said conductive lead electrically interconnecting said third lead of said delta capacitor network and said brush assembly comprises an electrical component adapted to reduce EMI emissions.

A method for reducing electromagnetic interference (EMI) emissions of an electric motor comprising:

• providing a motor including
• a field stack,
• an armature including a shaft,
• a commutator mounted on said shaft,
• an armature core electrically connected to said commutator, wherein said armature core is rotatably mounted within said field stack, and
• a brush assembly adapted to deliver electrical power to said commutator;
• forming a circuit including
• said field stack;
• a brush assembly adapted to deliver electrical power to said field stack;
• motor field coils;
• a delta capacitor network comprising three capacitors;
• and
• electrically interconnecting two leads of said delta capacitor network with said motor field coils and a third lead of said delta capacitor network with said brush assembly, wherein the electrically interconnecting step includes using a component adapted to reduce EMI emissions for forming at least a portion of the electrical interconnection between said third lead of said delta capacitor network and said brush assembly.