Dave Wilson, Editor, writes:
We see from your search that you're looking for information on the term "Variable Torque",
and we have a large number of manufacturers' news releases and technical articles here on Engineeringtalk which will be of interest.
Let me be your guide.
Start with
the news release Motors combine accuracy and power savings from
Motion Drives and Controls, which we summarised at the time by saying "Control algorithms combine the accuracy, precision and power savings of traditional servomotors with the higher torque and lower cost of traditional stepper motors".
A couple of weeks before,
we featured the news release Inverters pump water in Ireland from
Invertek Drives: "Two pressure levels can be set, one at which the drive stops the water pump operating and another at which the drive commences operation again".
In June 2007, we covered the news from WEG Electric Motors (UK)
concerning its CFW-8 compact drives
- take a look at Compact drives receive new features
which says: "The CFW-08 drives integrate the latest DSP (digital signal processor) and 16bit space vector modulation for optimised motor control and quiet operation".
Take a look also at the news release from Lafert Electric Motors, Saving energy with two-speed motors,
as well as Tension control in narrow web labelling machines from Andantex,
and Oversizing pump motors costs industry dear from WEG Electric Motors (UK).
See also:
Inverter helps clean up with less current demand
(May 2006)
An Optidrive VTC inverter has radically reduced the starting current requirements and also improved the efficiency and functionality of the Wesley Group's Wheel Wash machine
High power drives shrink to half size
(February 2006)
A new high power platform is designed for VLT 5000 Series, VLT 4000 Series, VLT 6000 HVAC Series and VLT 8000 Aqua Series variable frequency drives
Linear motion gear for making drive shafts
(December 2005)
Ballscrews and linear motion products from THK are being used by automotive producers to make drive shafts in front wheel drive cars, vans and trucks
Compact drives promise energy-efficient control
(December 2005)
Building on the success of its popular DF5 and DV5 families of inverter drives, Moeller Electric has launched two new models
More power to variable frequency drives
(July 2005)
A new design extends the product range of the VLT 5000 Series and provides increased flexibility, cost-effectiveness and reliability
Continuous torque drive claims new standards
(April 2005)
The Telemecanique Altivar 71 continuous torque variable speed drive is claimed to set new standards for performance, ease of installation and use, safety and openness for integration
Cased inverter drive eases installation
(February 2005)
The popular E7Z series inverter drive range from Omron has very recently been enhanced with the addition of a rugged, metal-cased IP54 version
How to pick the perfect hydraulic motor
(January 2005)
Picking your perfect hydraulic motor won't be that easy, but with the guidelines below you can start to select like a pro, says Jeff Klingberg
Drives optimised for higher performance
(May 2004)
New 110-250kW units in the Danfoss VLT 4000 series are optimised for increased reliability, higher performance, lower installation costs and lower overall costs of ownership
Enclosed drive tackles rugged environments
(April 2004)
The Jaguar TE is a new general-purpose AC inverter drive enclosed in an IP54-rated enclosure, making it ideal for use in environments where dust and water are a constant hazard
No compromise from compact drives
(July 2003)
WEG reckons its new CFW-08 range of compact drives is proof positive that users don't have to compromise on drive size, performance, ease of use or price
Dual-action brake takes on marine applications
(July 2002)
The novel dual-action Kopper-Kool water-cooled brake was developed by the Wichita engineering team in Bedford, England
AC drive range covers all applications
(June 2002)
WEG reckons it is offering the UK market the widest range of fully optimised motor/drive solutions with the launch of its own new range of AC inverter drives
Grand milestone for Omron and ILE
(June 2002)
The UK's largest supplier of lift control systems and components, International Lift Equipment (ILE), has just purchased its 1000th type 3G3FV inverter drive from Omron Electronics
Expanding drive range has sensorless regulation
(June 2002)
Danfoss Drives' popular VLT 5000 Series drives are now available in 575V AC models for 1 to 300hp installations
Adjustable frequency drives give variable torque
(April 2002)
The Danfoss VLT 4000 VT Series of UL, cUL and CE listed adjustable frequency drives are specifically designed to meet the performance and reliability demands of variable torque applications
Stainless steel enclosure for 0.18 to 45kW drives
(December 2001)
The new MC1000 series variable speed motor drive from AC technology features a stainless steel enclosure that ensures reliable operation in harsh environments
Drive keeps motor working at maximum efficiency
(November 2001)
Mitsubishi's new F500 series is a development of the highly successful A540 drive and uses Flux Optimisation technology to ensure the motor is working at its maximum efficiency the whole time
Monitor and control drives from anywhere!
(October 2001)
An Ethernet communication card means that users of Altivar 58 variable speed drives from Telemecanique can now monitor the status of their drives from almost anywhere in the world
Drives are air handling choice at London landmarks
(August 2001)
Altivar 58e variable speed drives from Telemecanique have been chosen to play a key role in the air-handling equipment which is being installed in two of the tallest buildings in London
Compressed Air savings for Colgate Palmolive
(July 2001)
The potential energy savings identified following an analysis of compressor installations at Colgate Palmolive in Manchester have led to the installation of an Enercon Energy Management System
Fieldbus control for adjustable frequency drives
(February 2001)
The SV9000 DeviceNet interface enables users to configure, control and monitor a wide range of parameters on SV9000 adjustable frequency drives from a PC, directly via a DeviceNet fieldbus network
Valves opened without expensive actuators!
(September 2000)
A new portable valve operating system is designed for use with manual valves in situations where valve size, pressure rating or work environment would otherwise demand a dedicated actuator
Fastest ever set-up for drives
(August 2000)
Cutler-Hammer has launched its new range of SV9000 adjustable frequency drives, offering more choices, options and accessories, and setting a new benchmark in installation speed
ProfiBus interfaces available for vector drives
(August 2000)
ProfiBus process field bus interface cards are now being offered as standard options by Meiden Europe for its range of VT230S multi-mode vector drives