| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique estimating the load on a pump with excellent accuracy. <P>SOLUTION: In a pump control device 100 for controlling the discharge of a brake fluid by using the rotation of a motor, the winding number is set in a circuit 140 for low-speed rotation so that the motor is rotated at the second rotational speed by the connection to the power supply voltage. In a circuit 130 for high-speed rotation, a part of windings of the circuit 140 for low-speed rotation is shared so that the motor is rotated at the first rotational speed by inputting the power supply voltage in an input terminal in the middle of the winding of the circuit 140 for low-speed rotation. An ECU 200 determines the loading state of the motor, based on the difference between the output voltage and the power supply voltage in an output terminal 170. <P>COPYRIGHT: (C)2009,JPO&INPIT |
