Electromechanical Systems MSU 2006 Jeff Rhoads and Terry Ballinger

Electromechanical Systems Electromechanical Systems have Integrated Mechanical and Electrical Components Electromechanical Systems have Integrated Mechanical and Electrical Components

Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another

Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another Current: a measure of the amount of charge passing through a substance Current: a measure of the amount of charge passing through a substance

Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another Current: a measure of the amount of charge passing through a substance Current: a measure of the amount of charge passing through a substance Resistance: a measure of the resistance to current flow Resistance: a measure of the resistance to current flow

Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another Current: a measure of the amount of charge passing through a substance Current: a measure of the amount of charge passing through a substance Resistance: a measure of the resistance to current flow Resistance: a measure of the resistance to current flow Ohm’s Law: Voltage = Current x Resistance Ohm’s Law: Voltage = Current x Resistance

Basic Electricity A Simple Circuit… A Simple Circuit…

Basic Electricity A Simple Circuit… A Simple Circuit… V

Basic Electricity A Simple Circuit… A Simple Circuit… V V load

Basic Electricity A Simple Circuit… A Simple Circuit… V I

Basic Magnetism Poles/Attraction Poles/Attraction

Basic Electromagnetism Electromagnets Electromagnets Lorentz Force Lorentz Force

Case Study I: Speakers

Speakers

Audible Range Young Adults Can Typically Hear Sounds Between 20 Hz and 20 kHz

Case Study II: Electric Motor

Electric Motor

Generators The Systems Used to Generate Electricity (Generators) are Almost Identical to Motors

Today’s Activity

Electric Motor Objective Create an electric motor capable of achieving maximum rotational speed.

Design Considerations Coil Design Coil Design Geometry Geometry Number of Loops Number of Loops Force vs. Inertia Force vs. Inertia Balance Balance Magnet Placement Magnet Placement Coil Placement Coil Placement Contact Surfaces Contact Surfaces

Measurement Procedures What is the best way to determine the rate of rotation?