Constant-power brushless dc motor

Details Constant-power brushless dc motor Constant-power brushless dc motor

H - Electricity

02

K

H02K 29/00 (2006.01) H02K 29/10 (2006.01) H02K 29/14 (2006.01) H02P 6/08 (2006.01) H02K 1/16 (2006.01) H02K 3/28 (2006.01)

Patent

CA 2320055

A constant-power brushless DC motor is provided, including a stator which is wound in parallel by phases and polarities and configured of n multi-phases, a rotor having a predetermined number of polarities, which is required to concentrate magnetic flux on its area, a commutation encoder including sensing regions and nonsensing regions, and two photo sensors set to each phase, the two photo sensors being connected to a controller, to exicite only (n-b) phases among n phases, starting and rotating the motor, thereby realizing a constant-power DC motor without commutator, which is effective in energy saving, has good characteristic of continuous speed conversion and compact configuration.

L'invention concerne un moteur à C.C. sans balai, à puissance constante, comprenant: un stator qui est enroulé en parallèle par phases et polarités et qui présente n multi-phases; un rotor ayant un nombre prédéterminé de polarités, nécessaire pour assurer la concentration du flux magnétique sur sa zone; un codeur de commutation comprenant des zones de détection et des zones de non-détection; et deux photocapteurs réglés sur chaque phase, connectés à un régisseur, pour exciter seulement (n-b) phases parmi n phases, pour faire démarrer le moteur et le mettre en rotation. On obtient ainsi un moteur à C.C. à puissance constante, exempt de commutateur, consommant peu d'énergie et présentant d'excellentes caractéristiques de changement de vitesse et de compacité.

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