| 摘要 |
<P>PROBLEM TO BE SOLVED: To control rotation speed of a pump driving motor so as to certainly detect reduction of delivery flow rate of the pump caused by a load of the pump and increase the delivery flow rate. <P>SOLUTION: This control device for the pump driving motor displays the reduction speed of power generation voltage VMT every time energization to the motor varies from the OFF state to the ON state (every time motor control signal Vcont varies from the Low level to the High level), and measures times T3, T5, T7 and the like required for reducing the VMT by a predetermined amount α (refer to times t3, t5, t7 and the like). The device sets the High level keeping time at a base time Tbase, determines that load degree of the pump is large when the state where the measured time is a predetermined reference time or less continues predetermined times (three times) or more (refer to time t7), sets the High level keeping time at a time (Tbase+Tadd) derived by adding a predetermined additional time Tadd to the base time Tbase, and increases an average rotation speed of the motor. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
