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A performance index for microprocessor controlled motor drives that incorporates a realtime motor model is presented that will allow a uniform assessment of algorithm efficiency regardless of platform.
English (United States)
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Motor drive performance index and measurement system
This system is a motor drive performance index that will be useful in measuring the algorithm efficiency of any motor drive system that incorporates a real-time vector model for commutation of an induction or permanent magnet synchronous machine. The actual performance index has the units of "RPM/MIPS" or revolutions per second / million instructions per second. This effectively allows the assessment of the performance of any vector control model regardless of the architecture of microprocessor (CISC or RISC), and the specific MIPS rating of the processor itself. It should be noted that the MIPS factor in this index is not that of the processor under test, but the number of MIPS required to calculate the specific motor model under test. For a test procedure, simply configure the system to operate at maximum speed and evaluate the processing power required to operate there. This test is notably very useful in determining if a specific drive is using an interrupt timer and scheduler as opposed to asynchronous interrupts to commutate a motor. It can be used to gain insight into the motor drive microcode without having documentation or performing significant reverse engineering.
Disclosed by International Business Machines Corporation