Invention Grant
- Patent Title: System and method for sinusoidal output and integrated EMC filtering in a motor drive
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Application No.: US17103820Application Date: 2020-11-24
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Publication No.: US11387761B2Publication Date: 2022-07-12
- Inventor: Zoran Vrankovic , Gennadi Sizov , Gary L. Skibinski , David A. Figie , Yao Da , Todd M. Oestreich , Adam M. Shea
- Applicant: Rockwell Automation Technologies, Inc.
- Applicant Address: US OH Mayfield Heights
- Assignee: Rockwell Automation Technologies, Inc.
- Current Assignee: Rockwell Automation Technologies, Inc.
- Current Assignee Address: US OH Mayfield Heights
- Agency: Boyle Fredrickson, SC
- Main IPC: H02P23/04
- IPC: H02P23/04 ; H02P27/08 ; H02M1/44 ; H02M7/5387 ; H02M1/14 ; H02M5/458 ; H02M7/04

Abstract:
A motor drive that outputs a sinusoidal waveform utilizes power switching devices operable at high switching frequencies. The switching devices may be operated, for example, between twenty kilohertz and one megahertz. A first filter is included at the output of the motor drive which has a bandwidth selected to attenuate voltage components at the output which are at the switching frequency or multiples thereof such that the output voltage waveform is generally sinusoidal. Additional filtering is included within the motor drive to establish a circulation path for common mode currents within the motor drive. Further, a shield is provided adjacent to those components within the motor drive that may experience voltage or current waveforms at the switching frequency or multiples thereof to cause radiated emissions to establish eddy currents within the EMI shield rather than passing through the shield into the environment.
Public/Granted literature
- US20210091697A1 System and Method for Sinusoidal Output and Integrated EMC Filtering in a Motor Drive Public/Granted day:2021-03-25
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