A New PWM and Commutation Scheme for One Phase Loss Operation of Three- Phase Isolated Buck Matrix-Type Rectifier

ABSTRACT:

The PWM paper, another PWM plan and substitution technique is exhibited for one stage misfortune task of three-stage detached buck network type rectifier. With the proposed PWM conspire, the most extreme passable voltage gain for one stage misfortune task can be accomplished, which allows the nonstop activity of the converter to convey 2/3 of evaluated influence and manage the yield voltage with greatest yield voltage drop under 5% of ostensible yield voltage.

PWM

Three phase isolated buck matrix  type matrix paper, with the proposed remuneration procedure, a shielded change from one phase disaster assignment to normal movement and the other path around can occur with least substitution steps (two-advance) under zero voltage exchanging (ZVS) condition. The execution of the proposed PWM plan and reward plans with one phase disaster movement is evaluated and checked by generations and preliminaries on a 5kW model.

CIRCUIT DIAGRAM:

 

Fig. 1. ZVS three-phase PWM rectifier.

EXPECTED SIMULATION RESULTS:

 

 Fig. 2. Simulated waveforms for 2/3PO_max, vLL = 480V and ma = 0.75 when “phase C” is shorted at t1 and recovered at t2: (a) input phase voltages, (b) input phase currents, (c) transformer secondary voltage, (d) output of bridge rectifier, (e) output voltage and battery set point, (f) output inductor current.

 CONCLUSION:

In this paper, errand of the three-arrange isolated Buck matrix type rectifier under one phase setback condition is depicted and another. PWM plan and pay technique for the one phase adversity action is proposed. With the proposed trading plan and remuneration method, two phase supplanting with ZVS (here either using ZVS or zero voltage turn-ON). Can be recognized for one phase incident action and besides for the change from run of the mill assignment to one phase disaster movement and from one phase setback errand to common action. Undertaking and execution of the converter with the proposed PWM and substitution method are affirmed with reenactment and preliminary outcomes.

ZVS

In perspective on the preliminary outcomes obtained from a 5 Kw model, it is exhibited that the converter .Can pass on 2/3 of most outrageous yield ability to the load and direct the yield voltage with most prominent voltage drop under 5% of apparent yield voltage. Current stress of the converter and data current .THD and range examination are in like manner outfitted in the test results with one phase mishap movement. The by and large huge THD (around 40%) is one of the drawbacks for this converter while working under one phase adversity condition.

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