Patent: 5,428,522
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Summary for Patent: 5,428,522
| Title: | Four quadrant unipolar pulse width modulated inverter |
| Abstract: | A four quadrant unipolar pulse width modulated (PWM) power conversion circuit for supplying a desired current to an inductive load uses an H-bridge circuit topology with an upper and lower pair of switching elements including a diode in parallel with each of the switching elements to provide a current path from the load to the power source when its respective switching element is non-conductive. A control algorithm generates switching element control signals to cause the instantaneous voltage across the load to alternate between a single polarity voltage and zero for a portion of the output load waveform to cause the average value of the load current to correspond generally with the desired average load current. |
| Inventor(s): | Millner; Alan (Lexington, MA), Mongeau; Peter P. (Westborough, MA), Daboussi; Zaher (Boylston, MA) |
| Assignee: | Kaman Electromagnetics Corporation (Hudson, MA) |
| Application Number: | 07/931,196 |
| Patent Claims: | see list of patent claims |
Details for Patent 5,428,522
| Applicant | Tradename | Biologic Ingredient | Dosage Form | BLA | Approval Date | Patent No. | Expiredate |
|---|---|---|---|---|---|---|---|
| Sanofi Pasteur Sa | IPOL | poliovirus vaccine inactivated | Injection | 103930 | February 04, 2000 | ⤷ Start Trial | 2012-08-17 |
| >Applicant | >Tradename | >Biologic Ingredient | >Dosage Form | >BLA | >Approval Date | >Patent No. | >Expiredate |
