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devry ECET425L Lab 4: Simple Motor Kit Start

Question # 00046405
Subject: Engineering
Due on: 03/21/2015
Posted On: 02/04/2015 12:12 PM

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ECET425L Lab 4: Simple Motor Kit Start
Objectives:
• Given a simple motor kit, study the model to understand the
underlying motor and generator magnetic principles.

Parts List:
• Simple Motor Kit
Introduction
Motors and generators are both considered machines, and both can operate
with either ac or dc. This laboratory briefly explores a dc motor. Permanent magnet dc
motors (PMDC) are dc motors that have poles consisting of magnets. One primary
advantage of these machines is that they do not require a dc field winding, and
they have no associated field winding copper losses, as do their dc shunt or induction
motor counterparts. Permanent magnet motors are typically the most efficient motors
available. It is only because of the high costs of permanent magnets that more of
these motors are not used. The prevailing work horse for generating power to the ac grid
is still the ac synchronous generator. A synchronous generator, like its dc counterpart the
shunt motor, must have its magnetic field supplied by a separate dc power source.

Prelab.
Build the simple motor kit per the instructions given in the provided link.

Download instructions from .simplemotor.com/kit7.htm">http://www.simplemotor.com/kit7.htm.



Procedure A. Simple, Permanent Magnet DC Motor

1. Document any troubleshooting issues you may have encountered in getting the motor to function.

2. Verify that the simple motor rotates, and note how much voltage is needed to turn the motor.

3. Include in your report an oscilloscope screenshot showing the collector to emitter voltage of the BJT.
Make sure to list all supporting details.
What is the applied voltage?
What is the resulting frequency of the waveform?
What is the corresponding rotor shaft speed?

4. Explain in detail how the simple motor works and be sure to include the functions of the reed relay and transistor.

5. Include a photograph in your report of your completed motor.

Questions and Discussion

1. Explain the major differences between a motor and a generator.
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devry ECET425L Lab 4: Simple Motor Kit Start

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devry_ECET425L_Lab_4_Simple_Motor_Kit_Start.docx (119.38 KB)
Preview: Parts xx a xx MotorYoke (frame)Field xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx RElAYA relay xxxxx as xxxxxx xxxxx is xxxxxxxxxxxx operated When xxxxxx T is xxxxxx the xxxx xxxxx enables x current to xxxx in the xxxx Generated xxxxxxxx xxxxx attracts xxx contacts inside xxx coil anf xxxx a xxxxx xxxxxxx and xxxxxx the motorFig xxxx RelayTRANSISTORA transistor xx anelectronic xxxxxx xxxxxxxxx used xx amplifier It xxxx from s x stack xx xxxxx layers xx semiconductor these xxxxxx are known xx base xxxx xxxxxxx (E), xxx collector (C) x very small xxxxxxxxxxxx current xxxxxx x much xxxxxx collector-emitter current xx flow So xx is xxxx xx amplify xxx signal, or xxx as a xxxxxx Darlington.....
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