| 摘要 |
<p>The system (10) allows control of an elevator apparatus (1) which comprises an elevator cylinder (5) with a piston (5a) coupled to a car (2), a pump (4) having the outlet coupled to the elevator cylinder (5), and an electric motor (3) coupled to the pump (4). The system comprises a speed regulator (11) associated with the motor (3) for controlling the speed of displacement of the car (2), and is predisposed for driving the speed regulator (11) in predetermined modes, such that the pump (4) rotates at a speed having a predefined value (W). The system (10) is also predisposed for driving the speed regulator (11) such that the motor (3) of the pump (4) is supplied with a voltage having a frequency (f) the value of which corresponds to said predefined speed value (?), increased by an amount (cft; fts, ftD) which is a predetermined function of the working pressure (P1) of the pump (4), such as to balance at least in part the effect of the leakage of operating hydraulic fluid in the pump (4).</p> |
