Invention Grant
- Patent Title: Rate limited common mode control for pulse-width modulation drives
- Patent Title (中): 速率限制共模控制脉冲宽度调制驱动
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Application No.: US13075376Application Date: 2011-03-30
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Publication No.: US08766588B2Publication Date: 2014-07-01
- Inventor: Manoel Soares , Michael Nussbaum
- Applicant: Manoel Soares , Michael Nussbaum
- Applicant Address: US MA Framingham
- Assignee: Bose Corporation
- Current Assignee: Bose Corporation
- Current Assignee Address: US MA Framingham
- Agency: Occhiuti & Rohlicek LLP
- Main IPC: H02P23/00
- IPC: H02P23/00

Abstract:
A method for pulse width modulation control of a multiple phase drive includes identifying at least one phase from the plurality of phases for the drive as eligible for clamping to one of a plurality of extreme power supply voltages, selecting a phase of the eligible phases having a largest magnitude driving current, determining a first offset signal as a difference between a control signal level for the selected phase and an extreme control signal level corresponding to one of the extreme power supply voltages, limiting a rate of change of the first offset signal to form a second offset signal, and determining a modified control signal for each of the phases for the drive including forming for each of a plurality of the phases a combination of the second offset signal and a control signal level for the phase to determine the modified control signal for the phase.
Public/Granted literature
- US20120249046A1 Rate Limited Common Mode Control for Pulse-Width Modulation Drives Public/Granted day:2012-10-04
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