Apparatus for flicker protection when a servo-motor starts

Details Apparatus for flicker protection when a servo-motor starts Apparatus for flicker protection when a servo-motor starts

1990-04-18

1991-05-14

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 86, 318458, 318611, 388833, 112271, H02H 324

Patent

active

050161334

ABSTRACT:
An apparatus for flicker protection when a servo motor driven sewing machine starts utilizing comparators. Setting the original voltage as the reference voltage and the dropped voltage as the monitor voltage, the comparator compares the voltages and, if the difference exceeded more than the predetermined value, signals for setting the maximum electric current to the servo motor are attenuated such that the voltage drop of the electric source will be reduced.

REFERENCES:
patent: 4323833 (1982-04-01), Watanabe et al.
patent: 4388572 (1983-06-01), Rosenfeldt
patent: 4456859 (1984-06-01), Watanabe et al.
patent: 4527496 (1985-07-01), Kemmel

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