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# ECET425L Lab 5: Simple Motor Kit Opto Objectives: Given a simple motor kit, study the model A+ work

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ECET425L Lab 5: Simple Motor Kit Opto
Objectives:
• Given a simple motor kit, study the model to understand the underlying motor/generator magnetic principles. Study an optoisolator and it’s use with
the simple motor kit.
Parts List:
• Simple Motor Kit and Optoisolator
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. Optoisolator operation and uses will be studied.

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

Procedure.
Motor Kit Testing

1. Look up a spec sheet on the optoisolator that came with your motor kit. Calculate the
resistor for the LED and the resistor for the photo transistor to change from 0 volts to
Vmax as the disk for the motor moves through the slot.

2. Turn in a picture of your motor turning and a picture with the motor not turning.

3. Turn in a short report outlining the calculations you made for the Opto interrupter and
turn in Oscope screen shots for the maximum and minimum RPM. Include a table of
voltages, motor speed, and the type of magnetic bias on the reed relay.

4. Explain why you can change the motor speed by placing the extra magnet close to the
reed relay.

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## [Solved] ECET425L Lab 5: Simple Motor Kit Opto Objectives: Given a simple motor kit, study the model A+ work

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