| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotational speed control method for a motor-driven pump for forming the pump with excellent pump performance and for preventing the pump from being overloaded, by taking out just enough motor power over a whole region in the vicinity of from a cutoff to delivery. SOLUTION: Input value of a system connected to a pump motor is detected. When a detection value is lower than a reference value, voltage is increased to increase a rotational speed of the pump motor. When the detection value is higher than the reference value, voltage is decreased to decrease the rotational speed of the pump motor. COPYRIGHT: (C)2003,JPO
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