Power supply circuit of an electric motor and corresponding...

Details Power supply circuit of an electric motor and corresponding... Power supply circuit of an electric motor and corresponding...

H - Electricity

02

P

H02P 25/04 (2006.01) G05F 1/10 (2006.01)

Patent

CA 2377980

A circuit for controlling the power supply voltage of an electric motor is described. The circuit comprises means for detecting the difference between a mains voltage (V1) and a reference voltage (V p), and means (11-14, 17) for generating an alternating correction voltage (V2) whose frequency is equal to the frequency of the mains voltage (V1) and which is phase-shifted with respect to said mains voltage (V1). The phase shift between the mains voltage and the correction voltage being proportional to the difference between the mains voltage and the reference voltage, and the correction voltage (V2) is added to the mains voltage (V1).

L'invention concerne un circuit d'alimentation permettant de commander la tension du réseau d'un moteur électrique. Le circuit comprend des moyens destinés à détecter la différence entre une tension de secteur (V1) et une tension de référence (Vp), et des moyens (11-14, 17) destinés à générer une la tension de correction alternée (V2) dont la fréquence est égale à celle de la tension de secteur (V1) et qui est décalée en phase par rapport à la tension de secteur (V1). Le décalage en phase entre la tension de secteur et la tension de correction étant proportionnelle à la différence entre la tension de secteur et la tension de référence, la tension de correction (V2) étant ajoutée à la tension de secteur (V1).

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