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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||363/36 ; 322/32 ; 363/42|
|발명자 / 주소|
|인용정보||피인용 횟수 : 49 인용 특허 : 11|
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 o...
A system for supplying controlled frequency power at a predetermined RMS value and predetermined fixed frequency derived from a prime mover having an operating RPM which is variable over a range from a minimum RPM to a maximum RPM comprising: an alternator having a rotor field winding adapted for mechanical coupling to said prime mover, and having a stator armature winding inductively coupled to said field winding for producing alternating current in response to rotation of said field winding, said field winding and armature winding being adapted to prod...