| 摘要 |
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.
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