Appeal No. 97-1408
Application No. 08/210,979
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. A method for controlling the working points of a
series-resonant-circuit inverter, comprising the steps of:
(a) determining a phase-angle actual value of a
measurable state variable of a load circuit, said state
variable having a phase-frequency characteristic which is
monotonically decreasing;
(b) setting a value of a phase-angle setpoint in
correspondence to said phase-angle actual value;
(c) defining a phase-angle system deviation based on the
phase-angle actual value and the phase-angle setpoint; and
(d) setting the frequency of an inverter in
correspondence with said defined phase-angle system deviation.
The references relied on by the examiner are:
Schutten et al. (Schutten) 4,951,185 Aug. 21,
1990
Oruganti et al. (Oruganti), “Resonant Power Processors: Part
II - Methods of Control,” 1984 Industry Applications Society
Proceedings, pages 868 through 878.
Claims 1 through 18 stand rejected under 35 U.S.C. § 103
as being unpatentable over Schutten in view of Oruganti.
OPINION
We have carefully considered the entire record before us,
and we will reverse the obviousness rejection of claims 1
through 18.
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 Next
Last modified: November 3, 2007