Fractional frequency converter using zero switching of input fre

Details Fractional frequency converter using zero switching of input fre Fractional frequency converter using zero switching of input fre

1986-10-28

1987-12-15

Beha, Jr., William H.

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

By semiconductor converter

318768, 318807, 363 10, H02M 527

Patent

active

047137444

ABSTRACT:
A frequency converter is provided for a three-phase electric motor and has input connections for a multi-phase alternating current electric supply source, and output connections for connection to a three-phase electric motor. A SCR bridge including a plurality of SCRs interconnects the input connections and the output connections. A trigger circuit is connected to the SCR bridge for selective firing of the SCRs, in response to timing pulses generated upon zero crossing of the input means phases. Logic circuits interconnecting said timing pulse generators and the trigger circuits for effecting selective sequential firing of the SCRs at the zero crossings. Firing of said SCRs is respectively terminated by natural commutation. In one embodiment of the invention single phase current is converted to multiphase current.

REFERENCES:
patent: 4300077 (1981-11-01), Katz et al.
patent: 4468726 (1984-08-01), Daigle et al.

Affiliated with

Also associated with

Rating

Fractional frequency converter using zero switching of input fre does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fractional frequency converter using zero switching of input fre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fractional frequency converter using zero switching of input fre will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1223782