| 摘要 |
FIELD: electronic equipment.SUBSTANCE: invention can be used for fans, pumps, etc. Electrically driven module (1) includes electric motor (2) with permanent magnets, inverter (3) feeding electric motor (2), step (4) of direct current supply to inverter, controller (8) containing a modulator (5), designed for actuation of inverter, controlled by first digital signal (Vs_act), which is amplitude of phase voltage applied to electric motor, and by second digital signal (freq_act) which electric current frequency of phase voltage. Drive module (1) includes analogue/digital stage (6) for calculating optimum value of angle (δ) advance in phase voltage applied to electric motor relative to an opposite electromotive force, as linear function of peak value of phase current, and analogue/digital stage (12) for measurement of angle (ϕ) between voltage applied to motor and phase current. Controller (8) is programmed to determine with sampling at frequency of electric current angle (γ) between phase current and an opposite electromotive force as difference between said optimum value of angle (δ) in phase and advance angle (ϕ), measured between voltage applied to motor and phase current.EFFECT: improved operational characteristics.7 cl, 8 dwg |
