Invention Grant
- Patent Title: Method and apparatus to mitigate DC bus over-voltages on common AC bus systems utilizing DC and AC drives
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Application No.: US17037979Application Date: 2020-09-30
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Publication No.: US11342861B2Publication Date: 2022-05-24
- Inventor: Zhijun Liu , Gary L. Skibinski
- 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: Fay Sharpe LLP
- Main IPC: H02M5/458
- IPC: H02M5/458 ; H02P23/00 ; H03H7/06

Abstract:
A method and line interface filter apparatus to couple a drive or group of drives to a shared multiphase AC bus, including individual phase circuits having an inductor coupled between a respective bus and drive phase lines, a resistor coupled to the respective drive phase line, and a capacitor coupled between the resistor and a common connection of the capacitors of the individual phase circuits, where the capacitance of the capacitors is 5 to 15 times a per-phase equivalent capacitance of the drive or group of drives, and the resistance of the resistors is two times a damping ratio times a square root of a ratio of the filter inductance to the filter capacitance, where the damping ratio is greater than or equal to 1.0 and less than or equal to 2.0.
Public/Granted literature
- US20220103086A1 METHOD AND APPARATUS TO MITIGATE DC BUS OVER-VOLTAGES ON COMMON AC BUS SYSTEMS UTILIZING DC & AC DRIVES Public/Granted day:2022-03-31
Information query
IPC分类: