Essay REET 420 Week 7 Complete Work DeVry
REET 420 Week 7 Complete Work DeVry
Week 7 Power Converter Systems
REET 420 Week 1 Discussion
WEEK 7: POWER-CONVERTER SYSTEMS
Welcome to Week 7! No TED Talk options this week. Questions are below.
What is the difference between a single-phase and a three-phase ac signal?
REET 420 Week 7 Assignment
Objectives
- Design a boost converter
Introduction
The boost regulator is the basic circuit required to convert a low voltage dc input to a higher voltage dc output. Also known as a step-up regulator, the buck consists of several key power components including the transistor switch, “free-wheel” diode, the output inductor and capacitor. When a boost converter is driven from an ac line-in, it is known as an ac/dc boost converter and is typically preceded in the circuit by a full wave rectifier that converts the ac to an unregulated dc that is input into the buck.
It is crucial to be able to select the major components of the discrete buck in order to deliver the specified regulated output voltage reliably. The voltage regulation is typically handled by an IC controller like the LM2585 which must be properly applied by the designer. Before beginning your Lab, download your lab7 cover sheet from file folder.
This Lab will use the following Lab Resources:
- Virtual Lab – Citrix
Use a personal copy of the software or access the Lab Resources, go to the Course Resources page – Lab Resources section.
- Design a buck regulator using a LM2585 to convert an unregulated input voltage of 10 Vdc to an output of 24 Vdc at 0.5 Adc. Use a controller frequency of 100 kHz. Assume that the transistor has an on resistance of 0.4Ω and that the diode drop 0.5 Vp when it is on. Select and properly specify all necessary components. Assume that the ambient temperature is 50° C. Show all necessary work for full credit.
- Be sure to calculate the power and current that must be provided to the regulator, the inductor’s inductance and current ratings, the power that the transistor and the diode must dissipate, and the value of the output capacitor.
- Once the components have been properly selected, go to a vendor like Digikey, Newark, or Radio Shack and find the component part numbers. Change your design if necessary to be able to use components that are readily available.
- Calculate the feedback resistors, power, and current that must be provided to the LM2585 regulator, the power that the IC must dissipate, and the junction temperature assuming that the ambient temperature is 50° C with no heat sink.
- Explain fully the operation of the LM2585 Boost Regulator IC.
- What is the difference between a boost and a flyback converter?
REET 420 Week 7 Assignment
Complete and submit the following assignment: Chapter 9, pp. 509-512, problems 9-1, 9-11, 9-20, 9-23, and 9-37
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