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Controllable Network Transformer (CNT)
Description: 

A Controllable Network Transformer is a small AC converter augmented with an existing load tap changing transformer with a small AC converter to simultaneously provide dynamic control of bus voltage magnitudes and phase angles over a meaningful control range with no additional energy storage elements. The converter includes two AC switches, a small filter capacitor and an inductor where the 2 switches are initially controlled with fixed duty cycles D and (1-D). For voltage magnitude control, the commonly used pulse width modulation technique can be applied. For voltage phase angle control, the concept of "DualVirtual Quadrature Sources" is used.

Applications: 

Controllable network transformers provide dynamic control of bus voltage magnitude and phase angles as well as line currents.

Key Technology Area: 
Advanced Components

Sample Vendors:

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