Patent ID: 9450533
Filing Date: 2016-09-20
CPC Classification: F04D,H02P,Y02B

Claim Text:
1. A fan comprising: a drive motor having a fan rotor; an apparatus for generating a rotation speed signal (n_i) that characterizes the rotation speed of the fan rotor, an apparatus for generating a power level signal (P_i) that characterizes the power level consumed by the drive motor; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined rotation speed target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) output at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the value of said at least one control signal (SW) in a first state, is determined by the first regulator (n_RGL), and in a second state, is determined by the second regulator (n_RGL), and wherein a first changeover from the first state to the second state occurs, when a first condition, having at least one first criterion, pertains, where the first condition satisfies the criterion that the power level signal (P_i) corresponds to a consumed power level that is less than said minimum consumed power level (P_min), in order to influence the power level signal (P_i) applied to said motor of said fan, so that the power level signal corresponds to a consumed power level that is at least equal to the minimum consumed power level (P_min).