Motion of conductors in magnetic fields generates voltage.
Machines convert energy by Faraday induction (generation) and Lorentz force (motion). Rotating fields and commutation or slip rings produce continuous torque. Energy conversion occurs through the air gap magnetic field.
The same machine can motor or generate.
Electromagnetic induction explains how motors and generators convert energy, so it is the foundation of all rotating electrical machinery.
Motion of conductors in magnetic fields generates voltage.
Electromagnetic induction explains how motors and generators convert energy, so it is the foundation of all rotating electrical machinery.
Relative motion between a conductor and a magnetic field changes the flux through the coil, which induces an EMF.
As the rotor turns, the conductors cut the field and induce a voltage that opposes the supply, which limits the current.
Typical applications include explaining the voltage generated by a turbine rotating in a magnetic field, designing the coil arrangement of an alternator and understanding why a motor draws more current when loaded.
Study "Three-phase power measurement" first (topic 55 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
Back EMF E=kΦω. Torque T=kΦI. Reversibility of machines.
The same machine can motor or generate.
The next topic is "DC generators", which builds directly on this one.
It is classed as Intermediate in Electrical Engineering (topic 56 of 106). It is an intermediate topic. Work through the beginner topics in Electrical Engineering first.
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