PRODUCTS DRIVES, CONTROLS & MOTORS


INTRODUCING THE NEW FEATURE-PACKED MELSERVO MR-J5 SERIES OF TSN-COMPATIBLE SERVO DRIVES


At its recent online press launch, Mitsubishi Electric introduced the new MELSERVO MR-J5 series of TSN-compatible servo drives. These new drives, the company explains, meet the demands for precision, dynamics and multi-axis synchronisation in applications such as: food and beverage, life sciences and printing/converting production. In addition to this, these also integrate a full suite of safety functions as standard, while embedded predictive maintenance functions provide users with the tools they need to increase machine productivity and availability. Improving the performance


of production lines and systems, this has a frequency response of 3.5kHz and a communication cycle time of 31.25µs. In addition, with the associated MELSEC motion module, users can synchronise up to 256 axes per module. The total system can support three motion modules, allowing systems of up to 768 axes to be controlled. Despite this performance, however, set-up is not complex – no


tuning experience is required, with a quick-tuning function generating all of the gain values automatically within approximately 0.3 seconds. The machine is then ready to run as soon as the servo is enabled, assuring smooth running with significantly reduced commissioning time and effort, the company explains. A key enabler for improved performance across multi-axis servo systems


is the integration of CC-Link IE TSN (time sensitive network) technology with 1Gbps transmission speeds, enabling synchronisation across all connected devices – including safety devices, which can be connected on the same network as standard control products such as variable speed drives, HMIs and I/O. Other network protocols such as EtherCAT are also offered as standard. Another benefit is that predictive maintenance functions have also been embedded, helping to reduce unplanned machine downtime and drive-up asset availability. These functions are powered by Mitsubishi Electric’s Maisart AI technology, allowing the new servo drive


series to detect mechanical component deterioration on the machine long before maintenance is required. Of additional benefit, machine wiring has been simplified with a new


single cable – for encoder, power and electromagnetic brake – with a new one-touch lock connector which eliminates the need for tightening screws. The 26-bit absolute encoder, which offers 67 million pulses per revolution, ensures precise motion control in demanding applications, while the elimination of the need for an internal battery reduces maintenance costs.


Mitsubishi Electric MINI MOTORS FOR MEDICAL APPLICATIONS


A North American medical device innovator needed a motor solution for an automated medication dispenser, which would provide accuracy and reliability of control at a competitive price. Not only does the dispenser have an audible alarm and LED visual indicator, which alerts the patient when to take their medication, but it presents user information via a clear, easy to read, screen and is simply controlled by large buttons connected to a micro motion system, which actuates the carousel holding the multiple pill containers. With demands on the mini motor’s motion control including


repeatable accuracy with higher torque at low speed, the company turned to Portescap. To meet demands, a Portescap 42L048D can stack mini-stepper motor was


selected. The design of these can stack motors ensures positional accuracy and increased reliability. Usually two-phase, the motors comprise two motor halves having two stator cups, each with poles formed around a winding. The rotor has the same number of pole pairs as the stator. Meanwhile, the poles on each stator cup are designed half a pole pitch apart. Two coils create four discrete positions per pole pitch and the 42L048D, with 12-pole pairs in each stator, has 48 steps per revolution or 7.5 degrees per step. This creates a high level of control accuracy and while open loop, means that no encoder is necessary, reducing cost and footprint. Motor speed and length of rotation are directly related to input pulse frequency and


any error is non-cumulative, which enhances repeatability of control. To ensure high torque at low speed, necessary for precision control of the dispenser’s carousel which holds the medication trays, the 42L048D features a large rotor and neodymium magnets, providing up to 18.5 oz-in (131 mNm) of holding torque. The mini motor can be digitally controlled with simple installation and interfacing


with a microprocessing drive. It can also be paired with Portescap’s EDM-453 microstepping drive for further increased system resolution from 1/2 up to 1/64 microsteps. It offers high angular resolution in static and dynamic modes and, for higher torque or acceleration requirements, the drive incorporates a boost mode as well as a power stage designed for high dynamic, peak duty performance. Combined, the EDM-453 microprocessing drive creates smoother motion with lower noise and includes a stand-by mode for heat and energy optimization. The mini-stepper motor is available in five or 12 Volt windings and unipolar or


bipolar polar construction. It can also be customised. Portescap


1 MARCH 2021 | DESIGN SOLUTIONS 2 www.portescap.com / DESIGNSOLUTIONS gb3a.mitsubishielectric.com ENERGY EFFICIENT HVAC DRIVE LAUNCHED


Now available from Control Techniques is the H300 HVAC drive range, which is fully optimised for fan and compressor control, with energy efficiency at the heart of its feature-set. Features include a series of HVAC-specific tools,


including an onboard fire mode which allows the drive to continue running uninterrupted in the event of a fire, allowing the safe extraction of smoke while the drive’s other functions are maintained. Conversely, H300 is designed to function efficiently in conditions from -20˚ up to 55˚C, making it ideal for refrigeration and cooling applications. H300 also integrates seamlessly with Building


Automation systems thanks to its built-in support for BACnet and Modbus RTU protocols. This can be expanded further, with optional integration modules enabling H300 to fit into virtually any existing system or communications protocol including POWERLINK, EtherNet I/P, PROFINET and many more. Additionally, its dimensions are among the smallest in its class, at every power rating, saving valuable building real estate and maximising mounting flexibility, the company adds.x Anthony Pickering, president of Control Techniques, said:


“The new range will deliver exponential energy savings, therefore reducing costs, while also providing the intelligent motor control features inherent to our drives. We’ve also expanded our unique free five-year warranty scheme to include H300, making it the ultimate ‘set and forget’ drive for customers in the HVAC world.”


Control Techniques https://acim.nidec.com/drives/control-techniques


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