| 摘要 |
<p>An electromagnetic driving device for positive displacement oscillating pumps comprises a linear motor (31) and a control circuit (51); said circuit controls the displacement of the linear motor (31) in relation to the difference between the instantaneous value (41) of a parameter caracterising the displacement (stroke, displacement speed, acceleration, pressure of the pumped medium) and the order value (55) of this parameter. A preferred embodiment is provided so as to readily replace the pump itself which is in the form of a disposable unit. Such a pumping unit is particularly useful for blood pumping. </p> |
