Load state decision apparatus for servomotor

Details Load state decision apparatus for servomotor Load state decision apparatus for servomotor

1990-04-04

1991-06-25

Ip, Paul

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318603, 318594, 318632, 36447411, 364513, G06F 1546

Patent

active

050270443

ABSTRACT:
A load state decision apparatus of a servomotor where a load current value of a servomotor during operation is sampled and compared with a prescribed value and then the load state is decided based on the result, a motor current value is detected by adding the function to the existing apparatus and the detected motor current value is sampled at prescribed time intervals and stored in a memory, and an effective current value is calculated from the current value data and the calculated effective current value is compared with the rated current value and the load state of the servomotor is decided, thereby a converting or detecting apparatus need not be installed externally but the load state can be decided automatically.

REFERENCES:
patent: 4475160 (1984-10-01), Inaba
patent: 4574227 (1986-03-01), Herder et al.
patent: 4607196 (1986-08-01), Abrahams et al.
patent: 4638221 (1987-01-01), Brignall

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