Title :
A frequency approach for current loop modeling with a PWM converter
Author :
Robet, Pierre Philippe ; Gautier, Maxime ; Bergmann, Claude
Author_Institution :
Nantes Univ., France
Abstract :
A new method based on a frequency approach is used to model a DC permanent magnet actuator driven by a pulsewidth modulated amplifier as a transfer function. This paper investigates two carriers used in industrial applications with analog or digital control. The accurate model presented takes into account the supply amplifier with the motor dynamics and includes the input control voltage sampling effect. Advantages and limitations of both carriers and control signals are discussed, and information about harmonic angles, magnitudes, and distortion are provided. The validation of the pulsewidth modulated model is carried out through simulations and experiments of both open and closed current loop systems with the effect of current ripple
Keywords :
DC machines; PWM power convertors; closed loop systems; digital control; electric actuators; electric current control; machine control; machine theory; permanent magnet machines; transfer functions; DC permanent magnet actuator; PWM converter; analog control; closed current loop systems; current loop modeling; current ripple effect; digital control; distortion; harmonic angles; industrial applications; input control voltage sampling effect; motor dynamics; open current loop systems; pulsewidth modulated amplifier; supply amplifier; transfer function; Actuators; Frequency conversion; Magnetic modulators; Open loop systems; Permanent magnets; Pulse amplifiers; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Transfer functions;
Journal_Title :
Industry Applications, IEEE Transactions on
