Control unit

Details Control unit Control unit

1976-05-10

1978-04-11

Shoop, William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363161, H02M 7155

Patent

active

040842231

ABSTRACT:
A control unit for a six-pulse reversing (two-quadrant) thyristor converter is disclosed. More particularly, a first integrator is provided for generating a sawtooth voltage for controlling the thyristors associated with all negative half-waves of the applied phase voltage, and a second integrator is provided for generating a sawtooth voltage for controlling the thyristors associated with all positive half-waves of the phase voltages. Additionally, an evaluation circuit is provided which is responsive to the zero crossings and polarities of the phase voltages and which controls the integrations of the integrators so that they start and end above and below respective first and second predetermined limits.

REFERENCES:
patent: 3465234 (1969-09-01), Phadke
patent: 3467850 (1969-09-01), Christian et al.
patent: 3821632 (1974-06-01), Rylicki
patent: 3825814 (1974-07-01), Pelly

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