The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1989
Filed:
Apr. 21, 1987
Marinus C Van Buul, Breda, NL;
U.S. Philips Corp., New York, NY (US);
Abstract
A switched voltage converter formed asymmetrically or symmetrically with one (S1) or two controlled semiconductor switches, respectively, connected in a series arrangement, with a first coil (L1) and a first semiconductor switching element (D1), for example, a diode. The coil is connected to a terminal of a first (C1) and a second (C2) capacitor. Arranged in parallel with the switch (S1) is a series arrangement of the first capacitor (C1) and of the parallel arrangement consisting of a second coil (L2) and a second diode (D2) in series and of a third diode (D3) and a third capacitor (C3) also in series. The junction point of the third diode (D3) and the third capacitor (C3) is connected to the first diode (D1) via a d.c. conection comprising a fourth (D4) and a fifth (D5) diode. The junction point of the fourth (D4) and a fifth (D5) diode is connected via the second capacitor (C2) to the junction point of the first coil (L1) and the first diode (D1). The coil (L1) also has an inductive load (L0) connected to it. The converter operates with a snubber circuit for voltage changes at the switch (S1) by the use of the third diode (D3) and the third capacitor (C3). If this circuit can be dispensed with, the converter is used without the third capacitor (C3) and the fifth diode (D5). The third diode (D3) is then connected to the junction point of the second capacitor (C2) and the fourth diode (D4). The converter then operates only with a snubber circuit for current changes.