(a) What is the operating value of the duty ratio? What power is lost in the battery resistance? (b) Propose an interface structure to improve operation and decrease losses. What are the duty ratio and battery resistance loss with your interface in place?

(a) What is the operating value of the duty ratio? What power is lost in the battery resistance? (b) Propose an interface structure to improve operation and decrease losses. What are the duty ratio and battery resistance loss with your interface in place?

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 8R: For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature...

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Concept explainers

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

Question

A buck-boost converter operates with an input battery. It converts +12 V to –12 V at a
power level of about 75 W. the switching frequency is 120 kHz. The switches have
200 ns switching time. The battery has an internal series resistance of 0.2  and series
inductance of 200 nH.

(a) What is the operating value of the duty ratio? What power is lost in the battery resistance?

(b) Propose an interface structure to improve operation and decrease losses. What are the duty ratio and battery resistance loss with your interface in place?

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Step 1: Given:

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Step 2: Formula used:

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Step 3: (a) The operating duty ratio

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Step 4: Power lost in the battery resistance

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Step 5: Current flowing through the battery resistance

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Step 6: b) Proposing an interface structure to improve the operation

VIEW

Step 7: Duty ratio

VIEW

Step 8: Power dissipated

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Solution

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