Injection molding machines having a brushless dc drive system

Details Injection molding machines having a brushless dc drive system Injection molding machines having a brushless dc drive system

B - Operations, Transporting

29

C

18/704, 341/91

B29C 45/64 (2006.01) B29C 45/50 (2006.01) B29C 45/66 (2006.01) B29C 45/70 (2006.01) B29C 45/77 (2006.01) H02P 6/04 (2006.01)

Patent

CA 2035020

An injection molding machine utilizing brushless DC motors (20, 124, 156, 148, 103, 176, 182) in its servomechanism drive systems. Brushless DC motors provide a cost effective high power drive system which has the simplicity of control of brush-type DC motors. By utilizing higher resolution encoders (39) and controlling pressure with a servomotor velocity control loop, motor cogging and zero velocity oscillations are minimized.

Machine pour moulage par injection utilisant des moteurs CC sans balais dans ses systèmes d'entraînement servocommandés. Lesdits moteurs CC sans balais confèrent au système une grande puissance à moindre coût, tout en gardant la simplicité inhérente aux moteurs CC à balais. En utilisant des codeurs à résolution accrue et en contrôlant la pression au moyen de la boucle de servomoteur pour le contrôle de vitesse, on diminue les variations du couple moteur et les oscillations à vitesse nulle.

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