US 7,151,352 B2 · Motor controller

Abstract

A motor controller having the electronic cam function that makes it smooth operation even if the number of operation patterns is lessened is provided. The electronic gear function included in a servo-amplifier and a divider are used to vary the gear ratio of an electronic gear in a previously provided ratio in accordance with an external rotation position so that the electronic cam function is realized. The motor controller further includes a program execution unit so that the electronic gear is operated in accordance with programs. Since the electronic gear function and the divider is included in an inexpensive servo-amplifier and is used to realize the electronic cam function, the inexpensive and intelligent system can be realized. Since the divider is provided in the system, the number of data and the reading frequency of the cam pattern can be decreased and accordingly the inexpensive system is realized.

Claims7

Dependent claims

A motor controller including:

an electronic gear part for producing a position command signal multiplied by any gear ratio;
and
a power converter for controlling a motor on the basis of the position command signal,
the motor controller comprising:
a first position calculator for converting an externally inputted signal into an external position signal;
a divider for dividing the externally inputted signal;
a second position calculator for converting an output of the divider into a divided external position signal;
a cam pattern memory for storing cam patterns;
and
a reading controller for reading out a cam pattern corresponding to the divided external position signal from the cam pattern memory,
wherein the read-out cam pattern being used as a gear ratio and a cam operation of the motor is controlled by a position control signal produced by the electronic gear part on the basis of the external position signal and the gear ratio by the read-out cam pattern.

8 more elements

Dependencies are inferred from the claim text.

Motor controller

Life of this patent

Motor controller

Life of this patent

Abstract

Claims7