Melexis Nv

Kalin Petrov

Rumen Marinov Peev

Hristo Hristov

A 2-phase BLDC motor is driven by a trapezoidal waveform. For one-half of the motor rotation period T, the phase is driven by the trapezoidal waveform and for the other half-period, the coil remains undriven. An up down counter is operable to increment at a first frequency fand to decrement at a second frequency f. Incrementing operation is initiated at the start of the driven period of the waveform and stopped at the start of the down slope of the waveform. Decrementing operation is initiated at the start of the down slope of the waveform and stopped at the end of the down slope. The ratio of frequencies f:fis used to measure the relative duration of the slope to the driven period and is selected to mirror the desired ratio of slope duration:driven period duration.

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Sofia, Bulgaria

Kalin Petrov