DONALD E DAVIS
Engineers in Dallas, TX
License number
Pennsylvania PE038261R
Category
Engineers
Type
Professional Engineer
Address
Address
2
Dallas, TX 75236
Pennsylvania
Pennsylvania
Personal information
See more information about DONALD E DAVIS at radaris.comName
Address
Phone
40 Cedarwood Rd, Reading, PA 19610
500 E Marylyn Ave APT E75, State College, PA 16801
5012 Nell St, Fort Worth, TX 76119
501 Albright Dr, Mechanicsburg, PA 17055
501 N Cactus Ave, Hubbard, TX 76648
Professional information
Regulated Ac Power System Energized By Variable Speed Prime Mover
US Patent:
4992920, Feb 12, 1991
Filed:
Sep 13, 1989
Appl. No.:
7/406720
Inventors:
Donald E. Davis - Dallas TX
International Classification:
H02M 5458
US Classification:
363 36
Abstract:
A three phase alternator is driven by a variable speed prime mover, and its rectified output is pulse width modulated by a gate controlled H-bridge power switch circuit. Predetermined pairs of power switches are gated on and off according to programmed duration and timing instructions contained in a read only memory. In a first embodiment, a sine wave output is produced by successive pulse trains. The first pulse train has alternating positive and negative constant amplitude pulses, with the widths of positive pulses varying sinusoidally and the widths of negative pulses being constant. The second pulse train has alternating positive and negative pulses of constant amplitude, with the pulse widths of the negative pulse components varying sinusoidally, and the pulse widths of the positive components being constant. The components of the first and second pulse trains have an energy distribution which corresponds to one cycle of a sine wave having a fixed frequency. The pulse width modulated waveform is filtered to produce a smooth, low distortion sine wave output waveform.
Superintendent At Paragon Sports Constructors
Position:
Superintendent at Paragon sports constructors
Location:
Dallas/Fort Worth Area
Industry:
Construction
Work:
Paragon sports constructors
-
Superintendent
Donald Richard Davis, Dallas TX - Lawyer
Address:
12790 Merit Dr STE 500, Dallas 75251
(972) 341-5123
(972) 341-5123
Licenses:
Texas - Eligible To Practice In Texas 1980
Education:
University of Texas School of LawDegree Doctor of Jurisprudence/Juris Doctor (J.D.)Graduated 1980
Owner At Davis Tractor &Amp; Machine
Position:
Owner at DAVIS TRACTOR & MACHINE
Location:
Dallas/Fort Worth Area
Industry:
Retail
Work:
DAVIS TRACTOR & MACHINE
-
Owner
Owner, Don Davis Plumbing
Position:
Owner at Don Davis Plumbing
Location:
Dallas/Fort Worth Area
Industry:
Individual & Family Services
Work:
Don Davis Plumbing
-
Owner