Methods and systems for reducing conducted electromagnetic interference

A wiring harness for an electric motor, said wiring harness comprising:

• an input configured to couple to a power source;
• an output configured to couple to the electric motor;
• a first conductive path between said input and said output;
• a second conductive path between said input and said output;
• a grounding path;
• a first line-side X capacitor coupled between said first conductive path and said second conductive path;
• a second line-side X capacitor coupled between said first conductive path and said second conductive path in series with said first line-side X capacitor, said second line-side X capacitor coupled to said first line-side X capacitor at a common point;
• a line-side Y capacitor including a first end and a second end opposite the first end, the first end of said line-side Y capacitor coupled to the common point;
• a first load-side Y capacitor coupled from said first conductive path to said grounding path between said first line-side X capacitor and said output;
• and
• a second load-side Y capacitor coupled from said second conductive path to said grounding path between said second line-side X capacitor and said output.

An electric motor assembly comprising:

• an electric motor including a power input configured to receive electrical power to operate said electric motor;
• and
• an electromagnetic interference (EMI) filter comprising:
• an input configured to couple to a power source;
• an output coupled to said electric motor power input;
• a first conductive path defined between said input and said output;
• a second conductive path defined between said input and said output;
• a grounding path;
• a first line-side X capacitor coupled between said first conductive path and said second conductive path;
• a second line-side X capacitor coupled between said first conductive path and said second conductive path in series with said first line-side X capacitor, said second line-side X capacitor coupled to said first line-side X capacitor at a common point;
• a line-side Y capacitor including a first end and a second end opposite the first end, the first end of said line-side Y capacitor coupled to the common point;
• a first load-side Y capacitor coupled from said first conductive path to said grounding path between said first line-side X capacitor and said output;
• and
• a second load-side Y capacitor coupled from said second conductive path to said grounding path between said second line-side X capacitor and said output.