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EETE MAY 2015

Motor control Online signal processing benefits from graphical programming iba AG has released extended its PC based measurement and automation system ibaLogic with numerous new functions and an even more intuitive user interface. At the core of the system is a completely new development, the so called runtime system based on a Programmable Automation Controller (PAC). This architecture commonly used in modern PLC systems was enhanced with properties typical of a measurement system. Typical application for ibaLogic include online signal processing in measurement systems, such as condition monitoring, process model implementation for production optimisation, and system interfacing. Perfectly suited for use in automatic test benches, the new ibaLogic version is available in different performance classes: a license-free entry-level version ibaLogic-V5-Lite or a full version with complete connectivity to iba’s OPC server. The fifth versions offers a very intuitive handling, allowing users to develop his solution using the graphic user interface almost without any prior knowledge to see the results immediately with animated connectors and an integrated multichannel recorder, ibaPDA-Express. iba AG www.iba-ag.com 32-Bit MCU offers on-chip floating point unit for better control Renesas Electronics’s RX23T Group of microcontrollers is based on the fast RX core, making the new 32-bit MCUs well suited for building high-performance inverter control systems for applications such as DC motor control in energy-efficient electric home appliances. By incorporating an on-chip floating point unit (FPU) without increased costs, the new chip eliminates the need to implement the decimal position shifting required when using a fixed-point arithmetic unit. This simplifies the software configuration and can reduce code size and development time by as much as 30 percent, claims the manufacturer. The on-chip peripheral functions are also optimized for single inverter drive, boosting the cost-to-performance ratio and making it possible to add high-precision inverter control to mid-range and entry-level products. The RX23T MCUs feature the RXv2 core (4.55 CoreMark/MHz target) and a DSP functionality, allowing operation processing to be maintained with no loss of real-time responsiveness when performing inverter control (sensor-less vector control), even when the CPU is not running at high speed. In addition, current consumption in low-power mode (data retained in RAM) is only 450nA, typical. Renesas Electronics Easy to program 3-phase www.renesas.eu brushless motor drive Haydon Kerk Motion Solutions has added the PBL4850E programmable 3-phase brushless motor drive to its IDEA drive line of motor controllers. A graphical user interface Hall current sensor comes in high-isolation package ACS722 and ACS723 Hall-effect current sensor ICs from Allegro MicroSystems Europe are now available in a high-isolation SOIC16 package. The low-profile surface-mount package is suitable for space constrained applications yet provides a 4800 VRMS isolation rating: the highest available from Allegro’s family of surface-mount current sensor ICs. These high-accuracy devices provide economical and precise solutions for AC or DC current sensing in industrial and commercial applications. In addition to their small size and high accuracy, the ACS722 and ACS723 have low power consumption and a wide operating temperature range with near zero magnetic hysteresis. Each device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimised through the close proximity of the magnetic field to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilised BiCMOS Hall IC, which includes Allegro’s digital temperature compensation technique, resulting in accurate performance over temperature. Allegro MicroSystems www.allegromicrosystems.com enables the automatic population of motion profile parameters based on entry of just a few motor characteristics. Complex parameter calculations or in-depth motor knowledge are completely unnecessary. Furthermore, Haydon Kerk’s IDEA software makes programming motors even easier through the use of intuitive, on-screen buttons, instead of complicated command sets or proprietary programming languages. The PBL4850E is a 4-quadrant brushless controller that utilizes sinusoidal commutation to produce smooth motion. The smooth torque produced by sinusoidal commutation minimizes torque ripple. The drive further refines motion by incorporating two motion profiles: trapezoidal and s-curve. The drive offers programmable current control of up to 5.6A peak with an optional current boost during ramping of up to 6.5A peak. With an input voltage of 12-48 VDC, the drive can accommodate a wide range of brushless motors. Hall cell signals are used for phase initialization, and an encoder provides positional feedback. Other features include 8 opto-isolated general purpose inputs and outputs. Each input is rated for 5 to 24 VDC, 8 mA maximum per input. The outputs are open collector, 5 to 24 VDC, 200 mA maximum per output. The PBL4850E IDEA drive communicates via a USB to mini USB. Haydon Kerk Motion Solutions www.haydonkerk.com 44 Electronic Engineering Times Europe May 2015 www.electronics-eetimes.com


EETE MAY 2015
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