Problem 1 (Source, Load and Battery). In the figure shown, a DC energy source generates power Pe to a bus with a load and a battery. At any instant in time the battery is represented by a voltage source E, and an internal resistance R, as shown. It is connected to the grid by Bidirectional DC/DC converter which we assume ideal, with no power losses and V, = kV, with k > 0 constant. The voltage E, depends on the state of charge of the battery, but let's assume it constant. Pe P DC/DC Load E DC/DC Bidirectional Vg = kV, Q1: Let the gain of the DC/DC Bidirectional be k =1 (ie assume it is not there). Determine an expression for the voltage V in terms of the powers generated and delivered to the load (Pe,P, ) and the battery voltage and resistance E3,R3. (Hint: simple DC circuit analysis and solve a quadratic equation. All voltages are positive); Q2: using the expression in Q1, let the power generated be Pe = 5.0kW and the battery be such that E, = 40.0V , R2 =0.052. What is the maximum power you can deliver to the load? (Hint: max P, for which the quadratic equation has real solution);

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Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.