High performance inverter

August 2001 Motion Control & Drives

Toshiba has launched a new high performance inverter, designated the VF-A7, that has advanced sensorless flux vector control, automatic tuning and comes with an integral filter.

The company has refined its flux vector control to develop exceptionally high torque at low speed and can claim more than 200% torque as low as 0,5 Hz. The speed control range has also been broadened to 1:150, which means the drive is well suited for high performance machines. The VF-A7 drive is also suitable for winding applications thanks to a new torque control feature.

On-line automatic tuning enables both easy set-up without motor instability and this function also allows high torque without being influenced by motor temperature. A further feature is the drive's ability to avoid nuisance tripping by varying acceleration and deceleration times according to load.

By incorporating an EMC filter as standard, Toshiba provides a drive that is inherently compliant with CE certification requirements and is significantly more compact than other drive/filter combinations. The company claims a space saving of up to 30%, which is a major benefit to panel builders and others with space constraints. Another consequence of the use of an integral filter is reduced wiring.

The VF-A7 comes with a host of options and communication capabilities. Additional to the standard RS485 comms port is a card giving RS232C, RS485 or connection to Toshiba's own high-speed TOSLINE-F10M, TOSLINE-S20 fieldbuses as well as DeviceNet and Profibus. There is a closed loop option to take encoder or resolver feedback, extended terminal boards and an externally connected parameter writer for remote programming.

The new VF-A5 series drives cover a range from 0,4 to 55 kW in three-phase 200 V class and from 0,75 to 280 kW in 400 V class.

TM Automation

(011) 867 2737

[email protected]

Further reading:

Next-gen battery-driven grease gun
SKF South Africa Motion Control & Drives
SKF’s innovative TLGB 21 battery-driven grease gun optimises lubrication efficiency and reduces costs, by seamlessly combining advanced technology with a smart, rugged design.

Read more...

---

Autonomous robots provide green logistics
DNH Tradeserve t/a DNH Technologies Motion Control & Drives
In 2007, Heinrich Amminger and Martin Trummer from Austria had an idea for revolutionising warehouse logistics. They developed the automated small part warehouse – an intelligent and very environment-friendly logistics system that is winning an increasing number of customers for Ylog, a startup company.

Read more...

---

Precision drives on the Red Planet
DNH Tradeserve t/a DNH Technologies Motion Control & Drives
More than 100 electric motors from maxon have been used on the Red Planet, and have withstood cosmic radiation, dust storms, and temperature fluctuations. The key to success is standard industrial products.

Read more...

---

Solar-powered drive solution for water pumps
Schneider Electric South Africa Motion Control & Drives
Schneider Electric South Africa has launched its Altivar Solar ATV320 variable speed drive (VSD), a solar-powered drive solution that is compatible with a wide range of water pumps, catering for water challenges and decarbonisation of irrigation pumping and agriprocessing machinery.

Read more...

---

Dependable belt rip detection
Motion Control & Drives
Becker Mining has launched the newly developed BRS4.0 belt rip detection system, with advanced features for greater durability, higher efficiency, and improved safety.

Read more...

---

Flat face and flat face screw couplings for mining
Motion Control & Drives
Quick couplings are the critical connectors that keep mining systems running. Within the mining industry, the choice of coupling can significantly impact equipment performance, downtime, and maintenance costs. Stucchi offers flat face and flat face screw couplings that are designed to withstand mining’s unique challenges.

Read more...

---

The importance of original branded bolt securing products
Bearing Man Group t/a BMG Motion Control & Drives
BMG is concerned about the proliferation of counterfeit merchandise, and the dangers associated with using inferior goods.

Read more...

---

New-generation drill rig
Motion Control & Drives
Epiroc is launching the new-generation PowerROC T35, offering both increased fuel efficiency and faster operations.

Read more...

---

Compressed air treatment do’s and don’ts
Artic Driers International Motion Control & Drives
As a long-established importer and manufacturer of air dryers, Artic Dryers often sees the results of poor installation and issues with aftercoolers that create serious problems in air drying systems.

Read more...

---

Understanding standby, prime and continuous gensets
WEG Africa Motion Control & Drives
The increasing reliance of South African businesses on generator sets to mitigate power disruptions highlights a crucial need for proper selection based on specific operational demands. Despite their growing usage, there is still widespread confusion about how to choose the appropriate genset, often leading to inefficient and costly decisions.

Read more...

---