Drives and Control Solutions

Motors, Control Solutions, Power Transmission and Advanced Motion Technology                                                                 

DCS-23-Lafert-HPSSeriesMagnetMotor-400.jpg

March 16, 2021

Hybrid Design for Hybrid Applications

Lafert presents the HPS Series of permanent magnet motors for automated equipment applications where induction motor performance falls short of the mark, or servo motor cost and complexity is impractical. It’s no accident that HPS Series motors are well suited to filling this motor capability gap; the motor construction integrates the cost-effective induction motor stator housing and stator winding with high-performance permanent magnet servo motor rotor technology. The hybrid design is a highly efficient synchronous motor which outperforms induction motors and offers tremendous value for speed control applications. An industry leader in permanent magnet motor technology, Lafert has proudly manufactured HPS Series Motors for over fifteen years. HPS motors are available from stock with standard power ratings to 50 HP for 230, 460, 575 V input. Mounting options include modular base mouths with or without standarized IEC (B5 or B14), and NEMA (C-Face) flanges. 

Reduced Losses, Increased Reliability

Energy efficiency has not been a traditional performance consideration for motion control applications, but efficiency has direct reliability and performance implications for motors and systems. All HPS Series motors exceed the current requirements for induction motor efficiency, NEMA Premium®, with motor efficiency performance at or above the “Super Premium” (IE4) level. This increased energy efficiency is due to the permanent magnet rotor construction, which reduces the electrical rotor losses to zero. Induction motor rotor losses are defined as the electrical power converted to heat by current flow (I2R) in the rotor, which typically accounts for 10 – 15% of total losses. Eliminating the rotor losses delivers the dual benefit of increasing energy efficiency and reducing the amount of heat generated by the motor. In simple terms: HPS Series motors create less heat per unit of mechanical power delivered to the load. This explains the reduced thermal rise and thermal time constant, and increased maximum ambient temperature and overload capability of HPS Series motors. The industry rule of thumb, which states that each 10°C rise in motor winding temperature reduces insulation life by half, establishes the case for correlation of reduced HPS Series motor losses with longer field service life. With less waste heat to be eliminated from the enclosure, HPS motors require less material volume and surface area to remain cool. Space and weight savings will vary but in the general case reductions on the order of 50 % can be expected in comparison to equivalently rated induction motors.

High Performance, Without Feedback

Energy efficiency has not been a traditional performance consideration for motion control applications, but efficiency has direct reliability and performance implications for motors and systems. All HPS Series motors exceed the current requirements for induction motor efficiency, NEMA Premium®, with motor efficiency performance at or above the “Super Premium” (IE4) level. This increased energy efficiency is due to the permanent magnet rotor construction, which reduces the electrical rotor losses to zero. Induction motor rotor losses are defined as the electrical power converted to heat by current flow (I2R) in the rotor, which typically accounts for 10 – 15% of total losses. Eliminating the rotor losses delivers the dual benefit of increasing energy efficiency and reducing the amount of heat generated by the motor. In simple terms: HPS Series motors create less heat per unit of mechanical power delivered to the load. This explains the reduced thermal rise and thermal time constant, and increased maximum ambient temperature and overload capability of HPS Series motors. The industry rule of thumb, which states that each 10°C rise in motor winding temperature reduces insulation life by half, establishes the case for correlation of reduced HPS Series motor losses with longer field service life. With less waste heat to be eliminated from the enclosure, HPS motors require less material volume and surface area to remain cool. Space and weight savings will vary but in the general case reductions on the order of 50 % can be expected in comparison to equivalently rated induction motors.

Leveraging Lineage, Learning More

In addition to synchronous operation, HPS Series motors inherits two characteristics from the servo motor with performance implications for motion applications. First, the reduced weight and dimensions of permanent magnet rotors yield higher HPS torque-to-inertia ratios than induction motors. Higher torque-to-inertia ratios are desirable because they supports higher system dynamic response and repeatability. Second, the synchronous motor torque-producing mechanism enables the flat torque curve across a wide speed range and a short-time 300% peak torque capability. Contact us to learn how and why the unique construction and capabilities of HPS Series motors can drive top performance from your next motion control application.

Source


Editor's Pick: Featured Article


DCS-23-Invertek-ForestCarbon-400.jpg

New woodlands are being created in the UK with the help of Mid Wales-based Invertek Drives through the Forest Carbon project to offset its carbon footprint. The company, which manufactures variable frequency drives (VFD) at its global headquarters at Welshpool, Powys, has worked with a local printing company to purchase ‘carbon balancing’ paper for all of its in-house printers, including the printing of its products’ handbooks.

Forest Carbon plants woodlands for companies wanting to mitigate the impact of their greenhouse emissions, as well as making a contribution to wider environmental benefits. It is the only UK-based carbon standard and is supported by the government.

The woodlands are planted at locations where they would not otherwise be commercially viable. The paper purchased by Invertek Drives is currently helping plant trees on land near Carlisle, Cumbria.

The new woodlands will not only help capture CO2, but also provide benefits for local biodiversity, landscape, flood management, water quality and recreation.

Referring to companies like Invertek Drives, Carbon Forest states: “These are companies who already avoid and reduce their emissions as far as they can and want to finish the job by capturing the remaining balance.”

Read More


 

Latest Articles

  • Prev
Join in with Rittal to sharpen up your IT & Industrial infrastructure, as well as your mission ...
Certified Electrical Safety Engineer (CESE) is an internationally recognized professional ...
Common in most industrial settings, electric motors are broadly grouped as those driven by ...
Machine safety is one of the most important requirements in factory automation and it can also be ...
Allied Electronics & Automation has strengthened its robust roster of more than 500 world-class ...
ABB has recently been awarded a major turnkey contract by Statkraft, Europe’s largest generator of ...
Traditionally, many industrial companies have relied on their service providers to help keep their ...
Some ten billion bearings are manufactured each year and, given the harsh conditions to which they ...
Keeping workers safe and keeping the production line going may seem contradictory, but in most ...
The design of HVAC systems poses unique challenges for things like motor control and circuit ...

Allied Motor MaintenanceSmall motors – both AC and DC – serve as critical points in industrial operations. They may be integral to automation and equipment control and serve multiple purposes to mechanically drive and actuate systems and equipment, but are often replaced rather than repaired or reconditioned.

Larger motors may be repaired, rewound, and sent into a motor rewind pool.  However, many motors will simply be replaced when imminent signs of failure are detected using smart equipment, instrumentation, and tools discussed below.

 

 

Read More


 

Latest News

  • Prev
Machine safety is one of the most important requirements in factory automation and it can also be ...
Allied Electronics & Automation has strengthened its robust roster of more than 500 world-class ...
Keeping workers safe and keeping the production line going may seem contradictory, but in most ...
The design of HVAC systems poses unique challenges for things like motor control and circuit ...
ABB has provided electrification, connected control and operations management systems, ...
With interest in driverless cars increasing all the time, and with car manufacturers looking for ...
Tundra was recently excited to announce that they’re now a part of the Wajax Corporation. Be sure ...
In October of 2020, orders in the mechanical and plant engineering sector matched the previous ...
Kerrwil Publications Great Place to Work. Certified December 2019 - December 2020

538 Elizabeth Street, Midland,Ontario, Canada L4R2A3 +1 705 527 7666
©2021 All rights reserved

Use of this Site constitutes acceptance of our Privacy Policy (effective 1.1.2016)
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Kerrwil