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Infineon announces field oriented control on 8bit MCUs

Posted: 05 Mar 2007     Print Version  Bookmark and Share

Keywords:Infineon Technologies  microcontroller products  DAvE Drive 

Infineon Technologies announced MCU and software development support tools that will help drive advancements in embedded industrial and automotive motor control applications.

Field Oriented Control (FOC) is increasingly being used in appliances because it results in higher efficiency by running the motor at optimum torque at all times; better dynamic response to enable very precise variable speed control (contingent on each stage of a washing program's cycle); and lower torque ripple to provide even and steady motor rotation at speed and also during start and stop operation. Typically, a 16bit or 32bit MCU or DSP is required to handle the complex trigonometric equations. Compared to these solutions, Infineon's 8bit XC886/8 families offer the full benefits of FOC at about 50 per cent of the overall electronic BOM cost. The computing performance of XC886 is boosted by a 16bit vector computer performing rotation and scaling operations. This combined with the PWM unit CapCom6E and a fast 8-channel 10bit ADC addresses the implementation challenges of FOC on an 8051 compliant MCU.

Compared to current solutions on the market, in which FOC execution engages the whole CPU load, FOC execution on the Infineon XC886 and XC888 microcontrollers only requires 58 per cent of the CPU's performance, providing ample headroom for applications such as system control and communication, for example with the display microcontroller. Unlike most hard-coded competitive FOC implementations, Infineon provides the additional benefit of software re-programmability adding flexibility and potential for differentiation to the application.

DAvE (Digital Application Virtual Engineer) Drive is Infineon's application code generator for the company's 8bit (XC886/8) and 16bit (XC164CM/CS) MCU families. It provides initialisation, configuration and driver code to ease programming. The new DAvE Drive helps to reduce the software development time for brushless direct current (BLDC) motor controls due to quick and easy configuration of complex peripherals. Designers of motor controls can quickly focus on application-specific software, such as the programming of washing machines or dish washers, thus allowing rapid prototyping. Compared to competitive configuration tools, the DAvE Drive software tool generates complete algorithms and does not derive from libraries. Additionally, it provides flexible code generation for customer selected motors, thus reducing system design time by about one man-year while allowing differentiation by system variations. Also, it implements block commutation as well as field oriented control.

The DAvE Drive software tool is included in the BLDC drive application kit which is a modular extension of Infineon's 8bit and 16bit kits. The combined tools comprise a complete development environment for industrial and automotive motor control applications consisting of MCU hardware, software, power semiconductors and motor drive.

The XC886/8 MCU with FOC capability are already available. They come in TQFP-48 and TQFP-64 packages for the -40°C to 125°C temperature range. In quantities of ten thousand, the XC886/8 products are priced at approximately Rs.106.50 ($2.35) per piece.

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