Implementation of DSP based SPWM for single phase inverter

Abstract

This paper presents theoretical and experimental aspects related to the implementation of a Digital Signal Processor (DSP) based Sinusoidal Pulse Width Modulation (SPWM) for single phase inverter. Two sinusoidal reference signals complement to each other are compared with a carrier signal to generate PWM signals for the switches. A digital SPWM algorithm is implemented in DSP TMS320F2812 using SIMULINK model constructed from blocks of the C2000 Embedded target Library. The efficiency of the inverter is high and its offers less total harmonic distortion. The proposed system is verified through simulation and is implemented in a prototype, and the experimental results are compared

Metode Sederhana untuk Mengendalikan Inverter 5-Tingkat Berbasis Algoritma ¼ λ

“…Beberapa peneliti telah mengembangkan teknik pengendalian digital berbasis micro-controller [18], [9], [11] dan berbasis Digital Sinyal Prosesor (DSP) [12]; [19]; [20] atau Field Programmable Gate Array (FPGA) [13]- [17]. Pengendalian berbasis micro-controller memiliki keterbatasan terkait memori dan kecepatan pengolahan sinyal karena algoritma yang sulit [8]- [10], solusinya menggunakan DSP dan FPGA.…”

“…Pengendalian berbasis micro-controller memiliki keterbatasan terkait memori dan kecepatan pengolahan sinyal karena algoritma yang sulit [8]- [10], solusinya menggunakan DSP dan FPGA. Pemanfaatan DSP dan FPGA mampu mengimplementasi algoritma yang sulit, misal gelombang sinusoidal diimplementasi secara langsung di dalamnya dan sistem ini dilengkapi dengan memori yang besar akan tetapi harganya mahal [19], [12]- [17]. Peneliti terkait algoritma berbasis panjang gelombang (λ) yaitu ½ λ telah dikembangkan dengan teknik pengendalian digital yang diimplementasi menggunakan DSP tipe dsPIC304012 [20] dengan memodifikasi gelombang sinusoidalnya.…”

Bi-directional converter for interfacing appliances with HFAC enabled power distribution systems in critical applications

“…This feature provides the SPWM operated Hbridge, followed by a lowpass filter, to be sufficient to generate the desired sinewave output and the capability of changing the operating frequency by changing the reference. The SPWM switching speed is set over at least 50 times the generated sinewave frequency [6] posing a limit on the maximum value at 20kHz for a converter operating with 1.0MHz SPWM switching speed.…”

Desarrollo de un variador de velocidad trifásico: enfoque de programación multitarea

“…Una de las tareas fundamentales de un variador de velocidad es la modulación senoidal de ancho de pulso SPWM (Senoidal Pulse Width Modulation) y su implementación se ha realizado utilizando dispositivos como [18]: controlador digital de señales (DSC, Digital Signal Controller), procesador digital de señales (DSP, Digital Signal Processor) [19], microcontroladores (MCU, Microcontroller) o arreglos de compuertas programables por campo (FPGA, Field Programmable Gate Arrays) [20][21][22]. Entre estos dispositivos los MCU's y DSC's se destacan por su bajo costo y menores requerimientos de hardware pero, a su vez, por una menor potencia de cálculo y capacidad de memoria.…”