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Save Energy with the Compact Drive for Sensorless Servo Control

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New from Parker Hannifin is the AC650S, a compact drive featuring an advanced sensorless algorithm for permanent magnet motors. 

These motors offer reduced size and higher efficiency compared to AC induction motors of the same power ratings, but have traditionally required the use of feedback sensors, increasing cost and complexity while impacting on overall system reliability. The sensorless AC650S enables users to take advantage of these more efficient products without the need for feedback sensors, and reap the benefits of significant energy savings.

The AC650S puts the drives world on the cusp of perhaps the most exciting development of the decade. Standard inverter drives are now truly able to reach servo levels of performance for dynamics, accuracy and repeatability. This is a step that has been anticipated for many years and is now entering the mainstream with open loop vector drives able to not only control induction motors to new levels of performance but also to control servomotor permanent magnet motors  directly. Over the next few years this will lead to a profound change in drive systems design, where induction, permanent magnet and servo solutions become interchangeable, cost is stripped from the design and build stage of the project, and user expectations change fundamentally – similar to what happened when people migrated from simple mobile phones to multi-capable 3G smart phones.

Belying its power and sophistication, the AC650S has been designed for easy commissioning and simple operation. It comes with built-in macros for the most common applications, including basic speed control, manual/auto control, preset speed, raise/lower and PID control, requiring users to set just a couple of motor parameters to complete the commissioning process. 

In addition, a set-up wizard will optimally tune the drive according to the load characteristics of any PM motor, enabling simple tailoring of the drive for best performance in more demanding applications. Parker also provides a library function for its own NX series PM motors which removes any tuning requirements – simply select the motors, specify the inertia, and you’re done.

The front panel interface provides easy control and monitoring of the drive parameters, and simplifies diagnostics and maintenance. In addition, a free programming, monitoring and diagnostic software platform (DSE Lite) is available, providing functions such as a chart recorder to monitor every parameter. Simplifying maintenance even further, an optional cloning module allows up to 10 drive configurations to be saved, archived and cloned without the need for a PC.

Available in power ratings from 0.25kW to 1.5kW for single phase supplies and up to 7.5kW for three phase supplies, the AC650S is one of the smallest drives in its class. Further, the ability to mount the drives side by side minimises panel space requirements. A built-in EMC filter provides compliance to EN61800-3.

The combination of the AC650S drive and PM motors will meet the needs of applications where energy savings are important (such as conveyors, fans, pumps, hydraulic systems and extruders) or where a more compact motor footprint is a significant advantage, such as in machine tools, packaging machines, conveyors, winders/unwinders and special purpose machines.

About Parker Hannifin
With annual sales of $10 billion in fiscal year 2010, Parker Hannifin is the world's leading diversified manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of mobile, industrial and aerospace markets. The company employs approximately 55,000 people in 46 countries around the world. Parker has increased its annual dividends paid to shareholders for 54 consecutive years, among the top five longest-running dividend-increase records in the S&P 500 index. For more information, visit the company's web site at http://www.parker.com, or its investor information site at http://www.phstock.com