Category: Industry Trends

1.2 kV, 4.000 kVA

The TMdrive-30 is a medium power, 1.250 V AC drive.

The AC-DC converter is available in three types: a diode non-regenerative

converter, a thyristor regenerative converter, and an IGBT regenerative

converter.

The inverters have a modular three-level phase leg assembly containing

the IGBTs, heat pipe cooling assembly, and IGBT gate driver circuit board.

The modules are mounted on heavy-duty slides that allow easy access for

maintenance.

The output frequency is variable from 0 to 120 Hz, and power levels up to

4.000 kVA are available.

TMdrive-30 Features and Benefits

Design Feature

• Draw out phase leg assemblies.

• Heat pipe cooling technology.

• Inverter based capture buffers. for fault conditions and process events

• Ethernet interface for configuration and monitoring.

Customer Benefit

• Draw out design enables a mean time to repair of 30 minutes.

• Each assembly contains IGBTs, heat pipe cooling plate, and IGBT gate driver

circuit board.

• Reduction in size of the power bridge and audible noise generated by the

cooling fans.

• Provides high-resolution (microseconds) data capture for analysis of inverter

faults or process events.

• High-performance data exchange for drive configuration and trending of pro.

3 to 11 kV, up to 19.500 kVA

The TMdrive-MVG2 is a medium voltage, AC fed drive designed for high-efficiency

and power-friendly operation in a broad range of industrial applications.

High reliability, low harmonic distortion, and high power factor operation are

designed into the drive.

Applications

The TMdrive-MVG2 is designed for a wide range of industrial applications,

including: Centrifugal pumps, fans, and compressors, screw compressors,

blowers, refiners, mixers, extruders, conveyors, press machines, slurry pipelines,

and mills.

TMdrive-MVG2 Features and Benefits

Design Feature

• Conservative design using 1700 V IGBTs

• High energy efficiency approximately 97%

• Diode rectifier ensures power factor greater than 95% in the speed control range

• Multi-pulse converter rectifier and phase shifted transformer: 3.3 kV Class: 18 pulse

6.6 kV Class: 30/36 pulse 10 kV Class: 48 pulse 11 kV Class: 54 pulse

• Multiple level drive output waveform to the motor (11 levels for the 6.6 kV inverter)

• Synchronous transfer to line option with no interruption to motor current

• Input isolation transformer included in drive package

• Direct drive voltage output level

Customer Benefit

• Highly reliable operation, expected 12-year drive MTBF

• Considerable energy savings

• Capacitors not required for power factor correction

• No harmonic filter required to provide lower harmonic distortion levels than IEEE-519-1992

guidelines

• No derating of motor for voltage insulation or heating is required due to motor friendly

waveform

• Allows control of multiple motors with one drive No motor current or torque transients when

the motor transitions to the AC line

• Better motor protection Less total space required Simplifies design and installation

• No output transformer required, saving cost, mounting space, and energy

3.3 kV, 40.000 HP

The TMdrive-70 is TMEIC’s flagship 3.3 kV, 40.000 HP water-cooled drive system,

delivering high-performance vector control and scalable power for the most

demanding industrial applications.

High-Power Performance with Compact Efficiency

The TMdrive-70 is a rugged, water-cooled, fully digital vector-controlled drive

system designed for high-demand applications requiring precise speed and torque

control. Utilizing advanced IEGT (Injection Enhanced Gate Transistor) switching

technology, the drive delivers high power density and system efficiency while

maintaining a compact footprint. Its modular converter, inverter, and cooling

unit design allows for flexible installation, lower floor space requirements, and

reduced infrastructure costs—making it ideal for applications ranging from metal

mills and compressors to grinding mills and mine hoists.

Flexible Architecture and Scalable Power Conversion

Engineered for versatility, the TMdrive-70 supports both induction and synchronous

motors and offers a choice between active regenerative or diode-based

non-regenerative AC-to-DC converters. Available in power levels from 5.000 to

40.000 kVA at 3.3 kV, it meets stringent IEEE-519-1992 harmonic guidelines while

integrating seamlessly with TMEIC’s control ecosystem, including the PP7 processor

and TMdrive Navigator tool. With scalable inverter and converter configurations—

including parallel arrangements of the TMdrive-D70 and TMdrive-P70—the TMdrive-

70 delivers unmatched control, flexibility, and reliability for high-capacity operations.

Features and Benefits

Design Feature

• IEGT power switch technology in the inverter and regenerative converter power bridges.

• High-Speed Switching  The IEGT is switched at a rate of 500 Hz, even at power levels

up to 10.000 kVA.

• Low power Gate Drive signals used to turn IEGTs on and off.

• Frequency Modulation Control (not traditional PWM) power switching scheme and

three-level power bridge control.

• Water-cooling technology for the power bridge.

• Control cards common to the TMdrive family.

Customer Benefit

• High-speed switching coupled with the three-level power bridge delivers a smooth sine

wave to the motor and power system.

• Low on-state IEGT voltage yields high efficiency.

• Motor and Power System Friendly Higher chopping frequency lowers the torque ripple

in the motor and load, and lowers harmonics fed back into the power system.

• Low power level voltage switched gate circuit has far fewer components than IGCT

current-controlled gate, increasing inherent reliability.

• Harmonics fed back into the power system are reduced to less than IEEE-519-1992

recommendations with no filters

• Reduced footprint, saving valuable factory floor space

• Modular design of power bridge, with each phase leg having its own set of quick

disconnects

• Minimizes maintenance time.

• Reduces required spares and increases spares’ availability.

The TMdrive-50 delivers 3.3 kV, 6.000 kVA of high-power performance

with flexible configuration, high reliability, and efficient IGBT-based

technology.

High-Power Drive for Demanding Precision Applications

Engineered for high-power and precision-controlled processes, the

TMdrive-50 offers 3.3 kV, 6.000 kVA of performance using efficient,

high-current IGBT technology shared across the TMdrive family.

Designed with customer needs in mind, it ensures high reliability,

simplified configuration and maintenance, and a low cost of ownership.

Its modular layout allows flexible arrangement of the converter, inverter,

and cooling units—maximizing power density while minimizing floor

space and installation costs.

TMdrive-50 Features and Benefits

Design Feature

• The control signal is voltage, not current.

• High switching speeds less than 2 µ per second.

• Simple switching circuitry.

Customer Benefit

• The IGBT requires very low power to switch, so control circuits are small,

with few components and therefore low failure rate

• Very low switching losses and accurate control.

• Gate driver hardware is compact. Careful design has allowed traditional

IGBT snubber components to be removed

Customer Benefit

• Unity (1.0) power factor across entire speed range

• Line side harmonics much lower than IEEE 519-2014

• Standard regenerative braking

• Reactive power control up to 80% of inverter kVA

• Highly reliable operation, expected 16-year MTBF

• No need for periodic capacitor replacement (15-year life)

• No derating of motor for voltage insulation or heating required

• Applies easily to existing motors without the need for an expensive output filter

• Eliminates the need for special VFD rated cables

• No Neutral Shift

• Simplifies design and installation

• Less total space required, plus easy integration in MCC building

• Higher reliability than transformer-less design

• High frequency transients are attenuated

• Reduction in spare parts

• Minimal personnel training for maintenance

• 30 minutes Mean Time to Repair (MTTR)

TMdrive-MVe2 Features and Benefits

Design Feature

• Active line side converter

• Conservative electronic design & dry film-type capacitors

• Multilevel drive output voltage waveform

• Input isolation transformer included in drive package

• Power conversion module in a single drawer type package

Synchronous bumpless transfer of the motor to the utility line

• Allows control of multiple motors with one drive

• No motor current or torque transients when the motor transitions to the AC line

• Dynamic VAR compensation for the synced motor

3.3 to 11 kV, up to 7.350 kVA (8.000 HP)

The TMdrive-MVe2 is a medium voltage, AC fed drive designed for high-efficiency

and power-friendly operation in a broad range of industrial applications.

High reliability, low harmonic distortion, regenerative operation and reactive

power control operation are designed into the drive.

Applications

The TMdrive-MVe2 is designed for a wide range of industrial applications, including:

Centrifugal pumps, fans, and compressors, screw compressors, blowers, refiners,

mixers, extruders, conveyors, press machines, slurry pipelines, mills, hot gas

expanders, etc. Energy regeneration capability is included, allowing braking of

overhauling loads and rapid stopping of loads such as fans and pumps.