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Module enables sensor-free motor control

Posted: 20 Oct 2006 ?? ?Print Version ?Bookmark and Share

Keywords:International Rectifier? IR? IRMCT3UF1? HiRel? iMOTION?

IR's HiRel hybrid <a href=motor control module" ALIGN="RIGHT">

International Rectifier (IR) has introduced a fully integrated high-reliability (HiRel) hybrid motor control module that enables digital, sensor-free vector control of permanent magnet motors. Based on the company's iMOTION integrated design platform, the IRMCT3UF1 module combines digital control, analog interface and power stage, thereby streamlining time-to-market and increasing design flexibility to accommodate drive system changes in HiRel applications.

"Compared to complex DSP- or microprocessor-based solutions that require position sensors and sophisticated programming, the iMOTION platform simplifies motor control design for aerospace systems," said Michael Toland, power modules product marketing manager of IR's HiRel products. "It is estimated that up to one man-year of motor control system design can be saved, eliminating the laborious code development associated with digital motion control," he added.

The module can be quickly configured to specific applications using the iMOTION ServoDesigner tool that facilitates drive parameter modification via memory-mapped registers. The control functions are contained in a powerful, pre-configured Motion Control Engine and its algorithm accommodates motor parameter variation for compatibility with a variety of brushless DC and permanent magnet AC motors, while creating robust Field Oriented Control.

In contrast to conventional motion control circuits, IR said its HiRel iMOTION module is a greatly simplified solution featuring high efficiency, reduced size and EMI suppression. It is built into the company's rugged, high-density plastic ring frame package and screened to various test methods of MIL-STD-883 for operation in severe environmental conditions. Less than half the size of a discrete solution, the module combines digital controller, memory, external interface, gate drivers and six power MOSFETs into an 8-inch?, 70.87g package.

IRMCT3UF1 promises accurate, high-performance speed and torque control without commutation or position sensors. Optimized sinusoidal current control enables current start-up sequencing and low loss space vector pulse-width modulation for smoother start-up and minimal torque ripple for maximum motor efficiency.

Pricing for the IRMCT3UF1 HiRel iMOTION module is $995 each in 100-unit quantities. Pricing is subject to change.

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