Rotational speed control system, rotatingly driving system,...

Details Rotational speed control system, rotatingly driving system,... Rotational speed control system, rotatingly driving system,...

2007-02-13

2007-02-13

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Of external fluid or means

C318S067000, C322S009000, C322S039000, C417S002000

Reexamination Certificate

active

10502783

ABSTRACT:
This invention relates to a rotational speed control system including a plurality of motor drivers for driving motors, and the object thereof is to drive a plurality of motors at the same rotational speed without depending on the number of motor drivers and without depending on the characteristics of each motor driver. A remote controller31and a motor driver202are connected to a motor driver201. The motor drivers201and202control motors M11and M12at a prescribed rotational speed, respectively. A rotational speed instructing signal91indicative of the rotational speed is supplied from the remote controller31to the motor driver201, and further supplied from the motor driver201to the motor driver202. Because the rotational speed instructing signal91indicates a rotational speed which is transmitted in a digital value between the motor drivers201and202, both of the motors M11and M12are driven at the rotational speed indicated by the rotational speed instructing signal91.

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