Carrier-based Space Vector Pulse Research Articles

Simulation and dSPACE Hardware Implementation of Carrier based SVPWM for Open-end Induction motor

This paper deals with the implementation of carrier based Space vector pulse width modulated methods (SVPWM) in conjunction with a three phase open end induction motor(OEIM). Among various PWM methods, now a day’s carrier based PWM methods draws more attention due to their easier digital implementation. The main focus of this paper is effortless digital implementation of PWM methods to drive the open end induction motor which is supplied using two dc to ac converters (VSI), using various carrier-based Space vector PWM schemes. MATLAB Simulink platform is used to simulate different carrier based PWM methods for the VSI fed Induction motor. In the present work dSPACE 1104 is used for the digital implementation. The simulation and hardware results which are obtained from various modulation techniques for the proposed model are secure produced by using voltage and current waveforms, FFT analysis, and the most predominantly the THD is slighter. Theoretical and realistic values are corroborating by simulation and experimentation.

Performance Enhancement of PPMIM Drives by Using Three 3-Phase Four-Leg Inverters

In this article, a multilevel inverter (MLI) scheme is proposed for 9-phase pole phase modulated induction motor (PPMIM) drives. The proposed inverter scheme is realized with the help of three 3-phase four-leg inverters. In 3-phase 12-pole mode (3PH-12PO), the proposed MLI supplies a 3-level voltage for each phase winding of the PPMIM drive with an improved harmonic profile, which results in better torque ripple. In this mode, the PPMIM drive performance is analyzed with a level shifted as well as phase shifted carrier based space vector pulse width modulation (SVPWM) techniques. On the other hand in 9-phase 4-pole mode (9PH-4PO), with help of phase grouping concept a 3-phase SVPWM implemented for enhancing the linear modulation of the 9-phase PPMIM drives by 15.4%. The fourth leg present in each 3-phase four-leg inverter is used effectively for suppressing the circulating currents in phase windings during 9PH-4PO operation. The proposed MLI is efficient to operate the PPMIM drive in both normal as well as fault conditions with rated power/torque. The proposed MLI-fed PPMIM drive performance with open circuit/short circuit of switch and source fault conditions are analyzed. The proposed MLI scheme is validated with the Ansys Maxwell finite element method (FEM) as well as laboratory testbed on a 5-hp 9-phase PPMIM drive under normal as well as open circuit switch/source fault conditions.

Sensorless Speed Vector Control Based on MRAS of Asymmetrical Two-Phase Induction Motor

This paper presents the sensorless speed vector control of an asymmetrical two-phase induction motor based on model reference adaptive system (MRAS). A three-leg voltage source inverter with carrier based space vector pulse width modulation (SVPWM) is used to offer unbalanced two-phase voltages for eliminating electromagnetic torque pulsaions. In order to perform rotor field orientation control the asymmetrical two-phase induction motor model is treated as a balanced model. Design of controllers for speed and current loops is fully given.The proposed flux and speed estimators can satisfactorily operate in various conditions. The dynamic and steady state performances of the proposed method are verified by both simulation and experimental results. The simltaion and experimental results are in good agreement.

Design and Analysis Three Phase Three Level Diode-Clamped Grid Connected Inverter

In general, Multi-level converter has been utilized widely in many applications, especially in renewable energy aspects. This is because of the associations in high power, medium switch voltage and lower output total harmonics distortion. In this article, the multi-level converter was constructed as a 2kW output power of the 3 phase 3 level diode clamped grid connected inverter. The proposed multi-level inverter uses a carrier based space vector pulse width modulation scheme in order to produces the desired output voltage. The scheme is the modulation of three identical reference signals, which is 120° phase shifted to each other comparing to a 10kHz triangular signal. These reference signals comprise of some harmonics in order to generate a space vector PWM signal for switches in the inverter. A Phase Lock Loop (PLL) is utilized together with the controller in order to phase and frequency locking between the voltage at the point of common connection (PCC) and voltage at the grid system. After the proposed inverter connected to the grid system, it can be injected the inverter current into grid system by using the appropriated PI (proportional-integrator) controller within the control scheme. However, L-C low-pass filter is also utilized at the inverter output for reducing harmonic contents. It results to reducing the output harmonic contents. In which, the value of THDv at PCC is less than 5%.

Simulation Analysis of Three Level Diode Clamped Multilevel Inverter Fed PMSM Drive Using Carrier Based Space Vector Pulse Width Modulation (CB-SVPWM)

This paper proposes implementation of Three Level Diode-Clamped Multilevel inverter using IGBT's fed PMSM drive. The pulses for the inverters have been developed by using Carrier based Space Vector Pulse Width Modulation Technique (CB-SVPWM). Carrier based Space Vector Pulse Width Modulation Technique is most prominent PWM technique for three phase voltage source inverters for the control of Permanent Magnet Synchronous Motors. The output voltages, currents, torque & speed characteristics have studied for three-level inverters fed PMSM drive. It has observed three -level inverter with Carrier based Space Vector Pulse Width Modulation Technique (CB-SVPWM) can use more DC link voltage as compare to Space Vector Pulse Width Modulation Technique (SVPWM). and also CB-SVPWM Technique utilizes DC bus voltage more efficiently and generates less harmonics.

Field Oriented Control of PMSM with Carrier Based Space Vector Pulse Width Modulation Technique

Field Oriented Control of PMSM with Carrier Based Space Vector Pulse Width Modulation Technique

Simulation of DTC-CBSVPWM fed SPMSM Drive with Five-level Diode Clamped Inverter

this paper a simulation analysis of DTC-CBSVPWM of SPMSM drive using five-level diode clamped inverter is analyzed. It has simple structure and provides dynamic behavior comparable with classical DTC. Direct Torque Control (DTC) is an accurate controller for permanent magnet synchronous motor (PMSM) due to its robust and fast torque response in steady-state and transient operating condition. However, the main disadvantage of DTC is high ripples in stator current, flux linkage and torque due to the application of same active voltage vector during the whole sample period and possibly several consecutive sample intervals. This can be overcome by using proper modulation technique. Space Vector Modulation (SVM) which synthesizes any voltage vector lying inside the sextant gives good performance, but however the complexity involved is more in calculating angle and sector. To reduce the complexity involved in SVPWM, a novel modulation technique named Unified voltage modulation or carrier based space vector pulse width modulation (CBSVPWM) is described using the concept of effective time. By using this method the inverter output voltage is directly synthesized by the effective times and the voltage modulation task can be greatly simplified. The actual gating signals for each inverter arm can be easily deduced as a simple form using the effective time relocation algorithm. Keywords-CBSVPWM, SPMSM, Five-Level Diode Clamped Inverter.