Method and apparatus for estimating a phase error between two in

Details Method and apparatus for estimating a phase error between two in Method and apparatus for estimating a phase error between two in

1997-05-30

1999-01-05

Berhane, Adolf

Electric power conversion systems

Phase conversion without intermediate conversion to d.c.

With automatic voltage magnitude or phase angle control

219110, 2191305, H02M 500, B23K 1124

Patent

active

058569200

ABSTRACT:
A phase control system has a stable timebase phase reference generated by an internal phase reference generator which has improved transient response in the presence of spurious noise generated by other external equipment coupled to the same voltage source. A digital phase comparator estimates a phase error between the timebase phase reference and the voltage source. The internal phase reference generator constructs the timebase using a normalized difference between the volt-time-areas between two adjacent quadrants of the internal timebase phase reference. This allows corrections to the phase reference generator to be made on the next cycle of the phase reference generator based on the error estimate of the present cycle.

REFERENCES:
patent: 4144440 (1979-03-01), Schalch et al.
patent: 4301351 (1981-11-01), Mathews
patent: 4371776 (1983-02-01), Winn
patent: 4390954 (1983-06-01), Manning
patent: 5149940 (1992-09-01), Davis et al.

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