Device and method for maintaining a voltage level in a control c

Details Device and method for maintaining a voltage level in a control c Device and method for maintaining a voltage level in a control c

1988-12-28

1989-11-07

Ro, Bentsu

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

318 34, H02J 900

Patent

active

048794759

ABSTRACT:
A device and method for temporarily maintaining a voltage level in a control circuit for auxiliary devices in a textile spinning machine, winding machine or the like wherein the control circuit is connected to an intermediate direct current circuit that is in series between a line voltage and the drive motors of the machine. The method includes reversibly supplying current from the intermediate circuit to the motors and inversely supplying current generated by the residual inertial energy of the motors to the intermediate circuit. The supplying of reversible current is controlled in response to a drop in line voltage to maintain the voltage level of the intermediate circuit and therefore of the control circuit supplying auxiliary devices. The controlling includes sensing a drop in line voltage and generating and transmitting control signals to reversibly supply current. The device functions to perform the method by providing a two-way converter for supplying current to the motors under normal operation and reversibly supplying current generated by the residual inertial energy of the motors in response to a drop in line voltage, a sensing device senses a drop in line voltage, and another component generates control signals for transmitting to the two-way converter for reversing thereof.

REFERENCES:
patent: 4096394 (1978-06-01), Ullmann et al.
patent: 4339779 (1982-07-01), Kalbach
patent: 4406950 (1983-09-01), Roesel, Jr.
patent: 4471233 (1984-09-01), Roberts
patent: 4592197 (1986-06-01), Wolf
patent: 4707774 (1987-11-01), Kajita

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