Filter for a motor drive

A motor drive comprising:

• a power source, wherein an output of the power source is configured to switch between a high voltage state and a low voltage state;
• and
• a motor,
• wherein the output of the power source is connected to an input of the motor via a filter, wherein the filter comprises:
• a plurality of phase lines configured to connect the output of the power source to the input of the motor;
• a plurality of capacitors, wherein each capacitor is connected between one of the plurality of phase lines and a ground;
• a plurality of primary inductors, wherein each phase line comprises one of the plurality of primary inductors;
• and
• a plurality of secondary inductors and a plurality of resistors,
• wherein each of the plurality of secondary inductors is connected in series with one of the plurality of resistors,
• wherein each of the plurality of primary inductors is connected in parallel to one of the plurality of secondary inductors and one of the plurality of resistors,
• wherein each of the plurality of capacitors is connected to one of the plurality of phase lines between the output of the power source and an input of one of the plurality of primary inductors.

A filter for a motor drive comprising:

• a plurality of phase lines configured to connect an output of a power source to an input of a motor, wherein the power source is configured to supply at the output of the power source a voltage that switches between a high voltage state and a low voltage state;
• a plurality of capacitors, wherein each capacitor is connected between one of the plurality of phase lines and a ground;
• a plurality of primary inductors, wherein each phase line comprises one of the plurality of primary inductors;
• and
• a plurality of secondary inductors and a plurality of resistors,
• wherein each of the plurality of secondary inductors is connected in series with one of the plurality of resistors,
• wherein each of the plurality of primary inductors is connected in parallel to one of the plurality of secondary inductors and one of the plurality of resistors,
• wherein the plurality of secondary inductors each have a lower inductance than the plurality of primary inductors.