Development of Software for Switched Power Supply Module with DSP Toolkit

Abstract

HVPS (High Voltage power supply) can be used in industrial application such as RF (Radio Frequency) heating. Design & implementation of on-board control for HVPS (high voltage power supply) is done with switched power supply module. Designed High voltage power supply regulation is critical and requires high speed switching electronic system. A DSP(Digital Signal Processor) software development to achieve on board con- trol, protection and communication functionality of the single Switched Power Sup- ply (SPS) module is proposed. Universal Asynchronous Receive/Transmit (UART) based communication for the SPS module allows transition from one state to an- other state as per defined sequence. On board controller manages the controlled reproduction and routing of gate pulse for SPS with settable frequency and vari- able duty cycle. A control interface is designed to communicate with Test Jig via UART bus protocol. A Test Jig (with another DSP) is also envisaged to demon- strate required functionality. Real time Parameters of SPS Module i.e. Heat sink temperature, DC link voltage (Analog to Digital Converter(ADC) based) & present state of the module should be monitored. Real time Pulse width modulation regen- eration with delay in terms of nano seconds achieved with XINT(External interrupt). Operating principles and protection considerations of SPS module are achieved by on-board controller software development of high voltage power supply. Complete system with Test Jig and one Field application board is tested and implemented to verify feasibility of the proposed scheme.