Firing pattern output generation for AC traction inverter contro

Details Firing pattern output generation for AC traction inverter contro Firing pattern output generation for AC traction inverter contro

1995-03-06

1996-06-18

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 41, 318811, 364480, H02M 744

Patent

active

055284868

ABSTRACT:
A method and apparatus for generating gating signals for each of a plurality of electric switching devices in electric power conversion circuit includes a microcomputer for computing timing data representative of a relative time for application of gating signals to each of the switching devices for generating a desired electric power output from the conversion circuit. The timing data is provided to a volatile memory which has a plurality of addressable memory locations in which each memory location address corresponds to a selected time increment. Timing signals are generated in an address format for the memory such that each of the timing signals addresses a unique memory location in the memory. The gating signals for the switching devices are stored in memory locations in the memory corresponding to the time with respect to a starting point at which it is desired to have the gating signals generated. As the timer-counter generates sequential timing signals, sequential locations in the memory are addressed and, if a gating signal is present in that location, a gating signal is output to the conversion circuit.

REFERENCES:
patent: 4047083 (1977-09-01), Barr
patent: 5168439 (1992-12-01), Kumar et al.
patent: 5414615 (1995-05-01), Kumar et al.

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