Integrated design platform for sensorless motor control

28 June 2006 DSP, Micros & Memory

International Rectifier has introduced a sensorless control platform for direct-drive permanent magnet synchronous motor (PMSM) washing machines.

The platform, featuring an embedded field oriented control (FOC) algorithm for high-dynamic torque control, improves washing cycles consuming less hot water, says IR. This control platform features a mixed-signal controller and companion intelligent power modules as well as algorithms, development software, and design tools.

Combined in one platform, iMOTION for washers simplifies design of variable-speed motor-control in both horizontal and vertical axis washing machines, accelerating time-to-market. The IRMCF341 washer control IC integrates all the control and analog interface functions required for sensorless speed control of PMS motors using DC link current measurements. The companion IRAMS06UP60B and IRAMS10UP60B inverter power modules feature an advanced high-voltage gate drive IC for three-phase inverter control.

The platform includes the IRMCS3041 reference design, in addition to Web-based software tools, to customise application requirements. The embedded field oriented control (FOC) algorithm optimises the output torque from interior permanent magnet motors and maximises bus voltage utilisation in the high-speed field weakening mode.

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