LyR Ingeniería electrónica

– Dimensioning, simulation, programming and construction of interfaces and operation panels for wind and PV systems.
– Processing of meteorological data from automatic stations.
– Development of embedded systems based on Cypress PSoC and Atmel AVR.
– Design and construction of low power DC UPS and associated systems.

1. Dimensioning, simulation, programming and construction of interfaces and operation panels for wind and PV systems

Example system, dimensioned and constructed for a wind/PV water pumping research system (UMAG / Chile 2014), based on a Cambpell Scientific CR850 datalogger (Figure 3.1).

Figure 3.1 – Main control board for Porvenir water pumping system (700 W PV + 1 kW wind turbine) for CERE -UMAG/Chile in Porvenir

Processing of meteorological data from automatic stations

Data processing from commercial or L&R stations is offered. In Figure 3.2 software developed by DataEntry / R.Vallejos for L&R Ingeniería is shown for processing of data from SWT generator and external METEO module in an isolated system application in Chubut.

Figure 3.2 – Software developed by DataEntry / R.Vallejos for L&R Ingeniería, for processing of data from SWT generator and external METEO module.

Figura 3.3– Datos procesados vía planilla de cálculo, obtenidos de medición durante ensayo pequeño aerogenerador en INTI-Neuquén (2013)

Development of embedded systems based on Cypress PSoC and Atmel AVR

Embedded systems based on 8 bit Atmel AVR (ATMega1284P for CL2bm1 board) or Cypress PSoC 1 ( C8Y29466 for M4/E and Meteo boards) can be developed. The associated programs written in C are converted to binary images and stored in internal Flash memory of the controllers, using a USB programming interface. In the case of AVR processors, a 6 pin interface to an AVR-ISP-MK2 (Olimex or AVR) low cost USB interface can be used. For PSoC 1, a Cypress USB MiniProg with a 5 pin connector can be used. In Figure 3.4 the IDE (Integrated Development Environment) from CodeVision AVR, produced by HP Infotech, which includes C compiler, linker and interface with USB programmers.

Figure 3.4 – AVR –based programming ( CPU Cl2bm1 board) using Codevision AVR — Figura 3.4 – Programación de sistemas basados en AVR-Atmel (placa CPU Cl2bm1) utilizando Codevision AVR u otras herramientas.

In Figure 3.5 the free Windows/only IDE (PSoC Developer or PD) used for Cypress PSoC 1 family controllers is shown. These are similar to FPGAs and include both analog and digital modules, for which PD Works like a graphical design system. It also sports a free C compiler, linker and interface to the Cypress MiniProg 1 USB programmer.

Programs can be delivered with source code and graphical documentation using yEd (free graphical software, Figure 3.6).

Figure 3.5 –Cypress PSoC (boards DLCy, M4/E, Meteo) programming using PSoC Designer as IDE.

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Figure 3.6 – Graphical process documentation using yEd

Design and construction of low power DC UPS and associated systems

Sistemas de suministro UPS CC de baja potencia

Reliable DC power for data acquisition (DC – UPS ó Uninterruptable Power Supply), specially in isolated systems with poor or non-existing grid connections can be a challenge. We offer DC-UPS systems for low to medium power supply using solar PV and grid connection, or other sources as required. Figures 3.7 to 3.9 show some of these systems.

Figure 3.7 – DC UPS with 24 Vcc and 14.4 Vcc outputs, from grid and PV panel supply (for INTI-Neuquen test site) in continuous operation since 2012.

Figure 3.8 – Small UPS-CC or power supply, for applications up to 1 A / 12 V

Figure 3.9 – UPS-CC for 2 A / 12 Vcc with SEPIC (LT1513-2) charger.