Industrial Brushless Servomotors
Industrial use of the brushless servomotor, for instance in robotics, is increasing rapidly, because of their low maintenance needs and capabilities at high transient speeds. They offer flexibility and high performance, and advances in power electronics and microelectronics means they are now more affordable.
This handbook gives the user of brushless servomotors a comprehensive guide to their use, including a description of all main features of the brushless motor drive system. Throughout mathematics is kept to a minimum and practical guidance is given based on real-life experience.
Peter Moreton is a Research Fellow at the University of Bristol, having spent time in industry and universities worldwide.
What people are saying - Write a review
We haven't found any reviews in the usual places.
air gap average axis back emf ball screw belt and pulley brushed motor brushless motor brushless servomotor Chapter circuit coil commutation compliance conductors current flows diagram drive pulley duty cycle effect equation example flux density gear ratio gives i2R loss IGBT incremental incremental encoder inductance input Laplace transform load inertia load mass magnetic field maximum mechanical time constant moment of inertia motor and load motor current motor shaft motor speed motor temperature motor torque newton metre normally optimum output torque permanent magnet phase poles position pulley reducer resonant frequency ripple rotating rotor rotor angle s-plane sensor shown in Figure shows signals sinewave motor sinusoidal slots Soac curve speed-sensitive loss squarewave motor stator heating stator winding steady-state supply voltage switches tacho temperature rise three-phase thyristor torque constant torque required transmission mechanism trapezoidal motor two-pole unloaded motor voltage waveform winding temperature zero
Page 4 - With the first finger in the direction of the field and the second finger in the direction of the current, the thumb indicates the direction of the force.
Page 4 - ... in the material. FORCE ON A CURRENT-CARRYING CONDUCTOR IN A MAGNETIC FIELD The current in a conductor is due to the motion of electrons. Therefore, if a current carrying conductor is placed in a magnetic field, there is a force on each moving electron and hence on the conductor as a whole. If a conductor of length /, carrying a current / is placed in a magnetic field B such that the direction of current makes an angle 6 with the direction of /( , then the magnetic force experienced by it has...