WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1980002776) FREQUENCY CONTROL APPARATUS FOR AC MACHINE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002776    International Application No.:    PCT/US1980/000614
Publication Date: 11.12.1980 International Filing Date: 23.05.1980
IPC:
H02J 3/40 (2006.01), H02J 3/48 (2006.01)
Applicants:
Inventors:
Priority Data:
42723 25.05.1979 US
Title (EN) FREQUENCY CONTROL APPARATUS FOR AC MACHINE
(FR) APPAREIL DE COMMANDE DE FREQUENCES POUR MACHINE A COURANT ALTERNATIF
Abstract: front page image
(EN)Frequency control apparatus, or simply frequency control, for an AC system, adapted to be connected in parallel with another system, with particular application to variable speed constant frequency (VSCF) systems. Each system has an individual frequency control which receives an input signal (72) that corresponds to the difference in operating frequency and/or phase, of the plural systems. Each individual frequency control contains a reference frequency oscillator (60) which operates at fixed frequency, a signal controlled oscillator (71), and a feedback loop (62-70) which compares the frequencies of the two oscillators (60, 71). When the input signal (72) is present, the frequency of the controlled oscillator (71) is varied accordingly, ultimately to a frequency which is the average of the natural frequencies of the plural systems. In the absence of input signal (72), the controlled oscillator (71) operates at the frequency of the reference oscillator (60).
(FR)Appareil de commande de frequences, ou simplement commande de frequences pour un systeme a courant alternatif, adapte pour etre connecte en parallele a un autre systeme, avec application particuliere a des systemes de frequences constantes a vitesse variable (VFCF). Chaque systeme possede une commande de frequences individuelle qui recoit un signal d"entree (72) correspondant a la difference de la frequence et/ou phase de fonctionnement de la pluralite de systeme. Chaque commande de frequence individuelle comprend un oscillateur de frequences de reference (60) qui fonctionne a une frequence fixe, un oscillateur commande par des signaux (71), et une boucle de reaction (62-70) qui compare les frequences des deux oscillateurs (60, 71). Lorsque le signal d"entree (72) est present, la frequence de l"oscillateur commande (71) varie en consequence, jusqu"a une frequence qui est la moyenne des frequences naturelles des differents systemes. En l"absence du signal d"entree (72), l"oscillateur commande (71) fonctionne a la frequence de l"oscillateur de reference (60).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)