Inventors:
Gary Randolph Fisher - Los Angeles CA, US
International Classification:
H02P 27/00
Abstract:
Two apparatuses are disclosed for providing a dynamically varying water surge in a salt-water reef aquarium. The first apparatus is a micro-controller based variable frequency reef surge drive for an AC permanent magnet synchronous motor (PMSM) submersible aquarium pump. Drive comprises voltage conversion circuitry , xmicro-controller , reef-surge generation program , variable frequency drive , mode switch and tidal cycle switch. Three user-selectable modes of operation are provided: a random frequency mode, a fixed-program mode and a tidal mode. A second apparatus comprises a novel submersible AC PMSM pump with dual impeller assemblies and dual input and output chambers for supporting forward and reverse flow through an AC PMSM pump.