TMEIC TMdrive®-70e2 Medium Voltage 3-Level IEGT System Drive

The TMdrive-70e2 is a new version of the popular TMdrive-70.

The drive offers 4kV class output, and is suitable for induction or

synchronous motors. The drive features:

•  Smaller size

•  Lower weight

•  Additional safety features

The new drive provides the same excellent benefits as the original:

• High reliability

• Regenerative converter

• Simple configuration and maintenance

• High energy efficiency and low cost of ownership

System Applications for the TMdrive-70e2 include:

• Main drives for hot strip steel mills

• Main drives for Cold Mills

• High power drives for compressors, fans, pumps, grinders and mine hoists

IEGT Technology Dramatically Lowers Cost of Ownership

The Injection Enhanced Gate Transistor (IEGT) is a breakthrough

in power switch technology, providing lower cost of ownership.

Features

•  Low Voltage Gate Drive Given that the IEGT is a MOS structure, it can

be gated (turned on/off) with ±15 V

•  Minimal Snubber Circuitry With the high dV/dt capability of the IEGT,

there is only need for a small dc clamp snubber circuit.

•  High-Speed Switching The IEGT is switched at a rate of 500 Hz in this

application.

Benefits

•  High Efficiency and Small Size

A very compact phase leg assembly is achieved with:

• A reduction in snubber circuitry

• Integral forward diodes

• Integral clamp diodes

•  Higher Performance

The reduction in snubber circuitry allows a higher chopping frequency,

lowering the torque ripple applied to the motor and harmonics fed back

into the power system.

•  Motor and Power System Friendly

The high-speed switching coupled with the three- level power bridge design

delivers a smooth sine wave to the motor and power system.

Bringing Reliable Control To System Applications

High-power, precision-controlled processes are ideally suited for the TMdrive-70e2

with its efficient high current IEGT power devices and control cards common to

the drive family. Flexible arrangement of converter, inverter and cooling units

allows for maximum power density, resulting in minimum floor space, and

installation cost.

Coordinated drive systems are an integral part of numerous manufacturing processes

in the metals industry. TMdrive system drives address all of these applications with

a robust control platform and a common Microsoft Windows based tool. The tool

supports local and remote connectivity, and is an invaluable asset for system and

process analysis. Due to its high reliability, simplicity of design and high efficiency,

the TMdrive-70e2 is perfect for compressor, fan and pumping applications.

It provides accurate speed control and high efficiency while eliminating

the need for high maintenance mechanical flow control devices. The TMdrive-70e2

is also well suited for applications like grinding mills and mine hoists, where high

overloads and impacts are a part of everyday operations.