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Motors, Gears, And Generators Lab

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Motors, Gears, & Generators Lab
Objectives:
1) Learn about motor and generator operation.
2) Generate and use motor torque/speed curves.
3) Learn about gear ratios and observe how they affect the rotational speed and torque of a motor or generator.
Pre-lab Questions
Answer the following questions before you begin the lab: For the motor characteristic curve shown below, determine the equation of the line: torque (T) as a function of the rotational speed ( ). In the figure below, is the stall torque and is the no load speed. The equation of the line should be written in terms of the variables above.

How can you calculate the gear ratio of a simple gear train with two gears? List 4 expressions that you could use to calculate the gear ratio. What is the difference between a motor and a generator? (Hint: what are the energy conversions that occur in each)
Problem Description:
Motors and generators are used frequently in engineering applications. In fact, you will use them in your final project. Gears (or pulleys) are usually used to transmit the power from the motor (input) to the output. A pair of gears forms a simple gear train. As engineers, you will need to understand how motors and generators work in order to pick appropriate ones to use in different applications or to know how your design will behave when hooked up to a particular motor/generator. In your final project for this course, you will use a generator (i.e. for wind power generation) and

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