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ECE 481/523 Homework Assignment: Battery Charger Circuit Analysis - Prof. Leon Tolbert, Assignments of Electrical and Electronics Engineering

The University of Tennessee (UT)Electrical and Electronics Engineering
Prof. Leon Tolbert

A homework assignment for ece 481/523, a university-level electrical engineering course, from the fall 2007 semester. The assignment includes five problems, the first of which involves analyzing a battery charger circuit. Students are required to determine the required value of resistance (rs + r) to limit the peak diode current, the dc component of the current delivered to the battery, the average power delivered to the battery, and the peak inverse voltage across the diode. Additionally, students are asked to consider the effect of a change in supply voltage frequency on these values.

Typology: Assignments

Pre 2010

Uploaded on 08/31/2009

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Homework #4 ECE 481/523 Fall 2007 Due 10/5/2007
1. The circuit shown below is a battery charger that is used to charge a 12.6 V car battery.
Assume that the diode is ideal. The supply voltage v
s
is 40sin(377t). Assume the battery
voltage is always maintained at 12.6 volts.
(a) What value of R
s
+ R is required to limit the peak diode current to 12 amperes?
(b) What value of direct current (dc) is delivered to the battery with the value of Rs + R from
part (a)? (Although the current delivered to the battery is not completely dc because it has
some ripple, find the dc component (or average) of the current delivered to the battery)
(c) What is the average power delivered to the battery?
(d) Determine the peak inverse voltage that appears across the diode.
(e) What effect would a change in supply voltage frequency from 60 Hz to 400 Hz have on the
answer for parts (a) through (d)?
2. Problem 6.1 in Mohan text.
3. Problem 6.12 in Mohan text.
4. Problem 6.21 in Mohan text.

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Homework #4 ECE 481/523 Fall 2007 Due 10/5/

  1. The circuit shown below is a battery charger that is used to charge a 12.6 V car battery. Assume that the diode is ideal. The supply voltage vs is 40sin(377t). Assume the battery voltage is always maintained at 12.6 volts.

(a) What value of Rs + R is required to limit the peak diode current to 12 amperes?

(b) What value of direct current (dc) is delivered to the battery with the value of Rs + R from part (a)? (Although the current delivered to the battery is not completely dc because it has some ripple, find the dc component (or average) of the current delivered to the battery)

(c) What is the average power delivered to the battery?

(d) Determine the peak inverse voltage that appears across the diode.

(e) What effect would a change in supply voltage frequency from 60 Hz to 400 Hz have on the answer for parts (a) through (d)?

  1. Problem 6.1 in Mohan text.
  2. Problem 6.12 in Mohan text.
  3. Problem 6.21 in Mohan text.