| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a vacuum cleaner with high workability by controlling a suction pressure by an inverter with high responsiveness. <P>SOLUTION: AC power given by a AC power supply 1 is input to an inverter circuit 4 after being converted into direct current, and is converted into three-phase alternating current with an optional frequency, and drives a motor 5 and a fan 6 connected to the inverter 4 at an optional rotation rate. A current control unit 9 controls the current to the motor 5 so as to be a predetermined current value. Further, a pressure control unit 10 controls the current flowing to the motor 5 by setting a target value flowing to the motor 5 so as to be a target pressure indication value in which a detection value of a pressure sensor 8 detecting the suction pressure of the vacuum cleaner is given from an outside, thereby, the suction pressure of the vacuum cleaner is controlled at an optimal pressure value for cleaning workability. <P>COPYRIGHT: (C)2013,JPO&INPIT |
