Power supply for body implant and method of use
First Claim
1. In an implanted blood pump system wherein power for driving the pump is provided by a transcutaneous transformer having an external primary winding means and an implanted secondary winding means and shunt regulator means for controlling the driving voltage applied to the pump, a method for regulating the driving voltage applied to the primary winding means, comprising, sensing the power factor in the primary winding means, comparing the sensed power factor to a predetermined power factor level selected to correspond with a desired pump driving voltage, and adjusting the voltage level in the primary winding means to substantially equalize the sensed power factor and the predetermined power factor level.
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Accused Products
Abstract
An implanted blood pump system is described wherein power for driving the pump is provided by a transcutaneous transformer having an external primary winding and an implanted secondary winding. Control of the driving voltage to the pump is provided by an implanted shunt regulator. Voltage applied to the primary winding is controlled in accordance with the power factor sensed in the primary winding.
236 Citations
10 Claims
- 1. In an implanted blood pump system wherein power for driving the pump is provided by a transcutaneous transformer having an external primary winding means and an implanted secondary winding means and shunt regulator means for controlling the driving voltage applied to the pump, a method for regulating the driving voltage applied to the primary winding means, comprising, sensing the power factor in the primary winding means, comparing the sensed power factor to a predetermined power factor level selected to correspond with a desired pump driving voltage, and adjusting the voltage level in the primary winding means to substantially equalize the sensed power factor and the predetermined power factor level.
- 4. An implantable blood pump system comprising, an implanted pump and a transcutaneous transformer having an external primary winding means and an implanted secondary winding means, said system further comprising implanted shunt regulator means for controlling the driving voltage applied to said pump, means for sensing the power factor in said primary winding means, means for comparing the sensed power factor to a predetermined power factor level selected to correspond with a desired driving voltage for said pump, and means for adjusting the voltage level in said primary winding means to substantially equalize the sensed power factor and the predetermined power factor level.
Specification