FIELD: electricity.
SUBSTANCE: control unit without position sensor of the electric motor with permanent magnets uses the induced voltage evaluator is used which uses the current value measured in γ-δ coordinates during the period of zero vector of voltage and the information on electric current derivative, and calculates the electric motor electromotive forces eγ, eδ. The calculated electric motor electromotive forces eγ, eδ are used in the rotation speed evaluator, the estimated angular rotation speed ω∧ is determined and by time integration of estimated angular rotation speed the estimated phase θ∧ is calculated.
EFFECT: improvement of accuracy of determination of angular position at low angular rotation speeds of the rotor of electric motor with permanent magnets.
13 cl, 6 dwg
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