Patent ID: 9621094
Date: 2017-04-11
CPC Classifications: H02M,H02P

Claim:
1. A motor drive operable to control operation of a motor connected to the motor drive, the motor drive comprising: a direct current (DC) bus having a positive rail and a negative rail, wherein the DC bus is operable to have a DC voltage potential present between the positive rail and the negative rail; an output having at least two terminals, wherein each terminal of the output is configured to be connected to the motor by a cable having a plurality of conductors, wherein the cable includes an electrical shield connected to a first ground connection, a cable capacitance located exterior to the motor drive is present between each of the conductors and the first ground connection; a power module having a plurality of switching devices, the power module having an output terminal corresponding to each terminal of the output for the motor drive, wherein: a modulation module operable to generate the control signal for each of the plurality of switching devices; at least one second ground connection, the at least one second ground connection located within the motor drive; a circuit board on which the power module is mounted; and a plurality of capacitors mounted on the circuit board, wherein each of the plurality of capacitors is electrically connected between one of the output terminals of the power module and the at least one second ground connection within the motor drive and each of the plurality of capacitors is mounted on the circuit board proximate to one of the output terminals of the power module.