To provide a pump device that can detect the rotational direction of a pump without depending on visual confirmation, and can rotate the pump in a positive direction.
The pump device comprises the pump P, a motor M, an inverter 12, and a control part which controls the output power of the inverter 12. The control part comprises an operation processing part 16, a memory part 17, and a current detection part 20 which detects an output current flowing to the motor M from the inverter 12. The operation processing part 16 compares an output current at the drive of the pump P in a first rotational direction and an output current at the drive of the pump P in a second rotational direction which is reverse to the first rotational direction, and decides the rotational direction of the smaller output current as the positive rotational direction of the pump P.
KOMAI MASAKAZU
OZAWA TAKAHIDE
HATABAYASHI KIMI
JP2001153085A | 2001-06-05 | |||
JP2008008282A | 2008-01-17 | |||
JPH11210672A | 1999-08-03 | |||
JP2001153085A | 2001-06-05 | |||
JP2008008282A | 2008-01-17 |
Ryoji Kosugi
Tetsuya Hirosawa
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