Digital motor control unit
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United States of America Patent
Stats
-
Jan 1, 2019
Grant Date -
Aug 18, 2016
app pub date -
Feb 12, 2016
filing date -
Feb 13, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Control of a plurality of electronically commutated motors is effected using a control unit and a power unit. The power unit enables the provision of commutation signals to each controlled motor. The control unit comprises a DSP and a FPGA. An input memory of the FPGA is mapped to the DSP. In use, the DSP determines motor repositioning signals, on the basis of a received motor position demand signal describing demanded motor positions and the encoded motor position data, and loads the motor repositioning signals into the input memory of the FPGA. The FPGA is operable to generate motor driving current signals for driving the motors into the demanded motor positions, on the basis of the motor repositioning signals and motor phase current samples collected by the power unit, and to output the motor driving current signals to the power unit.
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