Projeto de uma Fonte de Alimentação Ajustável Controlada via Bluetooth Aplicada a um Sistema Ferroviário de Baixa Potência
DOI:
https://doi.org/10.5902/2179460X42532Keywords:
Ferrorama. Arduino. BluetoothAbstract
As fontes de alimentação são dispositivos essenciais para o funcionamento de diversos equipamentos eletrônicos, são responsáveis por converter a corrente alternada (CA), proveniente da rede elétrica, em contínua, de acordo com as necessidades do aparelho alimentado. Nesse contexto, este trabalho apresenta o projeto de uma fonte de alimentação de corrente contínua (CC) conectada à rede elétrica aplicada a um sistema ferroviário de baixa potência que utiliza um motor CC para o deslocamento de vagões de trem. O sistema é composto por 5 estágios para obtenção da tensão desejada, emprega inicialmente um transformador com tomada central, que rebaixa a tensão de 220 V para 18 V, diodos retificadores, os quais convertem a CA em CC, um filtro capacitivo e um regulador de tensão. Por fim, é realizado o controle da tensão fornecida ao motor CC por meio da modulação por largura de pulso (PWM), provinda de um microcontrolador ATMEGA e modificada por um aplicativo para smartphone via Bluetooth, no qual foi desenvolvido na plataforma MIT App Inventor. Além do controle de velocidade, o sistema prevê o controle da direção da locomotiva, de uma barreira semafórica e também da iluminação do protótipo ferroviário construído.Downloads
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