Simplified Space Vector Based Hybrid PWM Algorithm for Reduced Current Ripple
نویسندگان
چکیده
This paper presents a simplified hybrid pulsewidth modulation (HPWM) algorithm to reduce the steady state ripple in current. In the conventional space vector PWM (CSVPWM) algorithm, the zero voltage applying time is distributed equally in every sampling interval. Also, this paper deals with two discontinuous PWM (DPWM) algorithms, which use only one zero state in each sampling interval. The proposed PWM algorithm is designed based on the notion of stator flux ripple. Modulation index and duty cycle dependent expression for rms value of the stator flux over a sampling interval is calculated. The rms flux ripple characteristics are graphically illustrated, from which the proposed hybrid PWM algorithm is developed. The proposed algorithm results in simultaneous reduction of harmonic distortion at all modulation indices. To validate the above proposed method, simulation studies have been carried out on v/f induction motor drive and the results have been presented and analyzed.
منابع مشابه
Adaptive Neural Fuzzy Inference Systems Controller for Hybrid PWM based vector controlled Induction motor drives
This paper presents a hybrid pulse width modulation (HPWM) algorithm to reduce the steady state ripple in current. In the conventional space vector PWM (CSVPWM) algorithm, the zero voltage applying time is distributed equally in every sampling interval. In order to modulate the required voltage vector it needs magnitude and angle. In the proposed HPWM algorithm, the effective time is determined...
متن کاملSpace Vector Pulse Width Modulation with Reduced Common Mode Voltage and Current Losses for Six-Phase Induction Motor Drive with Three-Level Inverter
Common-mode voltage (CMV) generated by the inverter causes motor bearing failures in multiphase drives.On the other hand, presence of undesired z-component currents in six-phase induction machine (SPIM) leads to extra current losses and have to be considered in pulse width modulation (PWM) techniques. In this paper, it is shown that the presence of z-component currents and CMV in six phase driv...
متن کاملPerformance Improvement in Vector Controlled Induction Motor Drive by Combining the Principle of Hybrid Pwm and Anfis
The complexity involved in the designing of a conventional PI type speed controller for an induction motor is replaced by fuzzy logic controller, synthesized by adaptive neural fuzzy interference system (ANFIS) method. This paper presents a hybrid pulse width modulation (HPWM) algorithm to reduce the steady state ripple in current. The conventional space vector pulse width modulation (CSVPWM) m...
متن کاملRobust sliding mode speed controller for hybrid SVPWM based direct torque control of induction motor
The conventional direct torque control (CDTC) is known to produce quick and robust response in induction motor drives. However, during steady state, torque, flux and current occur, which results in acoustical noise and incorrect speed estimations. The main objective of this paper is to present different hybrid space vector PWM (HSVPWM) methods for direct torque controlled induction motor for re...
متن کاملHybrid Pulse Width Modulation Method for VSI Fed Induction Motor Drive with Reduced Complexity
–This paper presents a generalized pulse width modulation (GPWM) algorithm for induction motor drives. In the proposed approach, by varying a constant ) ( 2 k value from zero to one, various DPWM algorithms can be generated along with the SVPWM algorithm. As the proposed approach uses instantaneous phase voltages only for the calculation of gating times of the inverter, the complexity burden in...
متن کامل