ELECTRONICALLY COMMUTATED MOTORS FOR LAUNDERING MACHINES

A control system for an electronically commutated motor (30) has a power conditioning circuit (72) for controlling the voltage (VM) applied to the winding stages (a, b, c) of a stator (1161) by a commutation circuit (76) via a power switching circuit (74) so that the applied voltage (VM) varies as a...

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Bibliographische Detailangaben
1. Verfasser:	ERDMAN, DAVID MARVIN
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR GENERATION HEATING LAUNDERING LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILEARTICLES LIGHTING MECHANICAL ENGINEERING REGULATING OR CONTROLLING COMBUSTION TEXTILES TREATMENT OF TEXTILES OR THE LIKE WEAPONS
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Beschreibung
Zusammenfassung:	A control system for an electronically commutated motor (30) has a power conditioning circuit (72) for controlling the voltage (VM) applied to the winding stages (a, b, c) of a stator (1161) by a commutation circuit (76) via a power switching circuit (74) so that the applied voltage (VM) varies as a function of an input signal. The input signal is provided by a function generator (140) which selectively generates one of a plurality of electrically varying signals, corresponding to one of a plurality of waveshapes to which the rotor is to be selectively made to conform in at least one sense of rotation. The input signal is variable over many commutation periods according to the selected waveshape substantially independently from any variation of the applied voltage during any one of the commutation periods.