| 摘要 |
<p>The present invention relates to a method for controlling the hydraulic pump of hybrid construction equipment. The method comprises a torque calculating step (s10) of multiplying the control current value (Is) of a turning motor (60) by the constant (Km) of the motor to obtain the torque (T) of the turning motor; an output calculating step (s20) of multiplying the torque (T) of the turning motor by the rotation speed (W) of the turning motor (60) to obtain the output (Ps) of the turning motor; a pump flow rate calculating step (s30) of dividing the output (Ps) of the turning motor with the discharge pressure (Pp) of a hydraulic pump (30) to obtain the equivalent flow rate (Qeq) of the pump; a turning flow rate calculating step (s40) of multiplying the rotation speed (W) of the turning motor (60) by the volume (Ds) of a hydraulic turning motor of an engine-type excavator to obtain an equivalent turning flow rate (Qes); a determination flow rate setting step (s50) of setting a greater value among the equivalent turning flow rate (Qes) and the equivalent flow rate (Qeq) of the pump as a determination flow rate (Qr) if the output (Ps) of the turning motor is a positive value, and setting′0′as the determination flow rate (Qr) if the output (Ps) of the turning motor is a negative value; a determination pressure calculating step (s60) of substituting the determination flow rate (Qr) in a pump horsepower control diagram to obtain a determination pressure (Pf); and a determination current value deducting step (s70) of substituting the determination pressure (Pf) in a current-pressure diagram to obtain a determination control current value (le). An electronic proportional pressure reducing valve of the hydraulic pump (30) is controlled by the determination current value (le).</p> |
