Transcription of Fundamentals of motor control - STMicroelectronics
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Fundamentals of motor control - STMicroelectronics
Fundamentals of motor controlIndustrial & Power conversion TrainingAgenda1 Basic principle3 Three-phase brushless DC motor2 Brush DC motor4 Bipolar stepper motor2 Basic principleAnelectric motor isa device converting electrical energy into mechanical energy (generally a torque).This conversion is usually obtained through the generation of a magnetic field by means of a current flowing into one or more an electric motor isMechanicalenergyMotorElectricalenergy4 Rotor and stator magnetic fieldsThe rotation is obtained thanks to the attractive force between two magnetic fields: One field is located on the rotor (the moving part). The second magnetic field is located on the stator (the body of the motor ).
• The motor is controlled applying a voltage on the motor leads. The higher the voltage, the higher the speed. The direction is changed reversing the polarity on the leads. • The maximum torqueis limited by the current rating of the motor and it is obtained at zero speed (start-up).
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