| 摘要 |
A pump system (10) for pumping a fluid includes a motor housing (46), a motor (36), a rod (50), a positive displacement pump (32), a position sensor (52), and a controller (18). The motor (36) is located within the motor housing (46). The rod (50) is connected to and driven by the motor (36) and the positive displacement pump (32) for moving a fluid is driven by the rod (52). The position sensor (52) produces a rod position signal that is a function of a position of the rod, and the controller produces a drive signal for driving the motor (36) as a function of the rod position signal. |
