9 - Movement of a Robot Basics of Electric Motor

# 9 - Movement of a Robot Basics of Electric Motor - ELEC300V...

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ELEC300V – Fundamental of Electro-Robotics all 2008 Fall 2008 Lecture 9 Movement of a robot Basic of Electric Motor

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Electro-magnetism basic poles uth and North 2 poles – South and North Like poles repel i t l t t t Opposite poles attract Magnetic filed – from N to S A current I flow through a wire will create (“induce”) a magnetic field B Right Hand rule
lectric Motor Electric Motor An electric motor uses electrical energy to produce mechanical energy Electro-magnetic theory -When a wire carrying an electrical current (I) is placed in a magnetic field (B), the wire will experience the Lorentz force which is given by The direction of the force can be termined by Fleming’s left hand rule B I L F determined by Fleming s left hand rule for electric motor Electric Motor has two parts, the stator is the stationary outside part of a otor the rotor is the inner part Rotational motor, the rotor is the inner part which rotates Stator – composed of two or more permanent magnet pole pieces or i di t l th t + - B force windings to replace the permanent magnet Rotor-composed of windings which are connected to a S N I stator mechanical commutator N turns of coil rotor

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Use of commutator in electric motor B b c +- I I a d + - c - + B d 0V b 0V - + a c b a + - I I B - d
How motor works (Animation)

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9 - Movement of a Robot Basics of Electric Motor - ELEC300V...

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