04988273 is referenced by 65 patents and cites 15 patents.

An injection molding machine utilizing brushless DC motors 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 and controlling pressure with the servomotor velocity control loop, motor cogging and zero velocity oscillatiions are minimized.

Title
Injection molding machines having a brushless DC drive system
Application Number
7/370669
Publication Number
4988273
Application Date
June 23, 1989
Publication Date
January 29, 1991
Inventor
Ronald M Sparer
Madeira
OH, US
Harold J Faig
Cincinnati
OH, US
Agent
C Richard Eby
Assignee
Cincinnati Milacron
OH, US
IPC
B29C 45/77
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