High Frequency IGBT-based Switch-Mode Design

The MT Series utilizes the latest IGBT devices to drive down size and increase performance. The high frequency design delivers fast transient response and low output ripple. This performance coupled with Magna-Power's rugged current-fed power processing, enables confidence in even the most demanding applications.

Fully Programmable Power

All MT Series functions and features of are available and programmable from a variety of control methods, including:

  • Stepless front panel knobs
  • 37-pin isolated analog-digital I/O
  • Computer interface with software and drivers

Various programming interfaces are available, such as LXI TCP/IP Ethernet (+LXI), IEEE-488 GPIB (+GPIB), Edgeport USB, Accessory (+USB), RS485 Accessory (+RS485).

Large 100 kW, 150 kW and 250 kW for High Power DC Demands

Magna-Power's MT Series consists of large high-power IGBT-based modules: individual 100 kW, 150 kW and 250 kW power supplies. As an added safety measure, all MT Series VI units include an input AC breaker rated for full power. The independent IGBT-based MT Series units are among the largest standard switch-mode power supplies on the market, minimizing the number of switching components, making it more economical and simpler to integrate than smaller module sizes.

Designed for Safety

MT Series power supplies have extensive diagnostic functions, including: phase loss, excessive thermal conditions, over voltage trip (programmable), over current trip (programmable), cleared fuse, and excessive program line voltage. When in standby or diagnostic fault, the AC mains are mechanically disconnected via an embedded AC contactor, providing confidence that the unit is only processing power when desired.

Scalable Master-Slave Operation

For maximum flexibility, all MT Series power supplies can be scaled a in master-slave configuration for higher voltage or current output. Using the plug and play Universal Interface Device (+UID47), units are tied together in via their 37-pin I/O, allowing an increase in system current when configured in parallel or increase in system voltage when configured in series—up to the power supply's output isolation rating.

Extensive Programming Support and Included Software

All MT Series power supplies come standard with a National Instruments LabVIEW™ and LabWindows™/CVI drivers. In addition, an IVI driver is included supporting Visual C++, Visual C#, Visual Basic .NET, MATLAB, Measure Foundry, PAWS, Visual Basic 6.0, and Agilent VEE Pro. A Standard Commands for Programmable Instrumentation (SCPI) command set is also supported, allowing programming using raw ASCII commands. Finally, Magna-Power's RIS Panel software is provided allowing for a virtual control panel controlling the power supply via any of the available communication interfaces.

MT Series Harmonic Neutralization

Magna-Power's Harmonic Neutralizers eliminate families of harmonic components by multiplying the number of input phases with specially wound magnetic components, reducing the total harmonic distortion (THD). These magnetic components, in combination with equally loaded, high-power DC power supplies, offer a cost-effective solution to maintaining power quality at acceptable levels, enabling applications to benefit from Magna-Power's reliable high-frequency switch-mode power supplies, extended into multi-megawatts. A 12-pulse Harmonic Neutralizer is embedded in all 250 kW models and its installation is transparent to the end user. For applications demanding an even better THD level than that provided by a 12-pulse waveform, external 24-pulse and 48-pulse harmonic neutralizers are available from Magna-Power. Contact you local sales partner for more information.

Understanding AC Harmonic Waveforms

The following figures are representative of expected AC current waveforms for the various pulses available from Magna-Power Electronics power supplies. Standard models 1.5 kW through 150 kW produce 6-pulse waveforms, while 250 kW models produce 12-pulse waveforms. Magna-Power Electronics Harmonic Neutralizers suppress families of harmonics by increasing the number of power phases. It can be used when multiple power supplies are used in series or parallel and are equally loaded. Harmonic Neutralizers can produce 12-pulse, 18-pulse, 24-pulse, or 48-pulse waveforms which have harmonic current components on the order of 12n±1, 18n±1, 24n±1, or 48n±1, respectively. The following figures show the theoretical difference for waveforms with a different number of pulses. Harmonic Neutralizers are protected with appropriate sized primary-side circuit breakers.

Why Neutralize Harmonics?

Input current harmonics are a by-product of nearly all power supplies. Power can only be delivered to the load if the frequency and phase of the voltage and current match. For a three phase power supply using a three phase input rectifier, the input current has a theoretical spectrum of 6n±1 where n is an integer incrementing from 1; this is known as a 6-pulse waveform. This means that a power supply with a three phase input rectifier will produce input currents at 1, 5, 7, 11, 13, 17, 19 ... times the fundamental frequency. The theoretical magnitude decays as the reciprocal of the harmonic component. The 5th and 7th harmonic components have magnitudes of 20% and 14% of the fundamental component, respectively.

Harmonics currents in power systems can find unusual paths and can cause problems if the magnitude is significant and there are loads sensitive to harmonic frequencies. For example, lighting ballasts have series connected capacitors and inductors which can be excited by harmonic currents. IEEE has introduced standard, IEEE 519, which defines recommended limits. Implementing this standard requires a knowledge of the power system and other loads producing harmonics. Unfortunately, the standard can allow the same power supply to possibly exceed limits in one application and not in another. In the same respect, a power supply may or may not can cause a harmonic related problem with or without meeting IEEE 519. The best solution to minimize the risk of a harmonic problem is to eliminate the harmonic current at the source.


There are hundreds of possible configurations for the MT Series product. Using the following ordering guide and models chart to define the best model for your application. Need lesspower? Visit our MS Series product line.

Model Ordering Guide

Models Chart

The following chart details the available standard MT Series models. The Current Maximum (Adc) column is separated by the available power levels. To determine the appropriate model, first select your output Voltage Maximum (Vdc) to find appropriate row. Next, select one desired Current Maximum from the row that contains your desired Voltage Maximum. Then, construct your model number according to the model ordering guide, above. Non-standard voltage and current configurations are available. Configurations above 1000 kW are also available. Please contact your local sales partner for more information.

  100 kW 150 kW 250 kW 500 kW* 750 kW* 1000 kW*    
Voltage Maximum Current Maximum Ripple (mVrms) Eff. (%)
16 6000 N/A N/A N/A N/A N/A 35 90
20 5000 N/A N/A N/A N/A N/A 40 90
25 N/A 6000 N/A N/A N/A N/A 40 90
32 3000 4500 N/A N/A N/A N/A 40 90
40 2500 3750 6000 12000 18000 24000 40 91
50 2000 3000 5000 10000 15000 20000 50 91
80 1250 1850 3000 6000 9000 12000 60 91
100 1000 1500 2500 5000 7500 10000 60 91
125 800 1200 2000 4000 6000 8000 100 91
160 620 900 1500 3000 4500 6000 120 91
200 500 750 1250 2500 3750 5000 125 91
250 400 600 1000 2000 3000 4000 130 92
375 270 400 660 1320 1980 2640 170 92
400 250 375 625 1250 1875 2500 180 92
500 200 300 500 1000 1500 2000 220 92
600 160 240 400 800 1200 1600 250 92
800 120 180 300 600 900 1200 300 92
1000 100 150 250 500 750 1000 400 92
1250 80 120 200 400 600 800 500 92
1600 62 90 150 300 450 600 600 92
2000 50 75 125 250 375 500 800 92
2500 40 60 100 200 300 400 900 92
3000 32 48 80 160 240 320 1000 92
4000 24 36 60 120 180 240 1100 92
  Input Current Per Phase (Aac)    
380/415 Vac, 3Φ 191 287 478 956 1434 1912    
440/480 Vac, 3Φ 165 248 413 826 1239 1652    

For models with the High Slew Rate Output Option (+HS), ripple will be higher. Power levels marked with an asterisk (*) are formed by master-slaving multiple 250 kW modules in master-slave parallel using the UID47 device.


Nominal Voltage
3 phase, 3 wire + ground
380 VAC (operating range 342 - 418 VAC)
415 VAC (operating range 373 - 456 VAC)
440 VAC (operating range 396 - 484 VAC)
480 VAC (operating range 432 - 528 VAC)
Frequency 50-60 Hz (operating range 45 Hz to 66 Hz)
Power Factor > 92% at maximum power 100 kW and 150 kW modules
> 96% at maximum power 250 kW modules
Output Specifications
Ripple See Model Charts
Line Regulation Voltage Mode: ± 0.004% of full scale
Current Mode: ± 0.02% of full scale
Load Regulation Voltage Mode: ± 0.01% of full scale
Current Mode: ± 0.04% of full scale
Load Transient Response 2 ms to recover within ±1% of regulated output with a 50% to 100% or 100% to 50% step load change
Efficiency ≥ 90% (See Model Charts)
Stability ± 0.10% for 8 hrs. after 30 min. warmup
Isolation User inputs and outputs: referenced to Earth ground
Maximum input voltage to ground: ±2500 Vac
Maximum output voltage to ground:
±1000 Vdc for models less than or equal to 1000 Vdc,
±4000 Vdc for models greater than 1000 Vdc.
Maximum Slew Rate Standard Models:
100 ms for an output voltage change from 0 to 63%,
100 ms for an output current change from 0 to 63%.
With High Slew Rate Option (+HS):
4 ms for an output voltage change from 0 to 63%,
8 ms for an output current change from 0 to 63%.
Bandwidth Standard Models:
3 Hz with remote analog voltage programming,
2 Hz with remote analog current programming.
With High Slew Rate Option (+HS):
60 Hz with remote analog voltage programming,
45 Hz with remote analog current programming.
Physical Specifications
Power Size (H" x W" x D") Weight
100 kW 62.5 x 48 x 31.5 in (158.8 x 121.9 x 80.0 cm) 1600 lbs (725.8 kg)
150 kW 62.5 x 48 x 31.5 in (158.8 x 121.9 x 80.0 cm) 2100 lbs (952.5 kg)
250 kW 62.5 x 72 x 31.5 in (158.8 x 182.9 x 80.0 cm) 3300 lbs (1496.9 kg)
500 kW 62.5 x 144 x 31.5 in (158.8 x 365.8 x 80.0 cm) 6600 lbs (2993.7 kg)
750 kW 62.5 x 216 x 31.5 in (158.8 x 548.7 x 80.0 cm) 9900 lbs (4490.6 kg)
1000 kW 62.5 x 288 x 31.5 in (158.8 x 731.6 x 80.0 cm) 13200 lbs (5987.4 kg)
Control Specifications
Voltage Programming Accuracy ± 0.075% of full scale voltage
OVT Programming Accuracy ± 0.075% of full scale voltage
Current Programming Accuracy ± 0.075% of full scale current
OCT Programming Accuracy ± 0.075% of full scale current
Voltage Readback Accuracy ± 0.2% of full scale voltage
Current Readback Accuracy ± 0.2% of full scale current
External Analog Programming and Monitoring Levels 0 - 10 Vdc
External Analog Output Impedances Voltage output monitoring: 100 O
Current output monitoring: 100 O
+10 Vdc reference: 1 O
External Digital Programming and Monitoring Limits Input: 0 to 5 Vdc, 10 kO input impedance
Output: 0 to 5 Vdc, 5 mA drive capacity
Remote Sense Limits 3% maximum voltage drop from output to load
Operating Temperature 0°C to 50°C
Storage Temperature -25°C to +85°C
Ambient Temperature 0 to 50°C
Temperature Coefficient 0.04%/°C of maximum output voltage,
0.06%/°C of maximum output current.
Air Cooling Front and rear intake, top exhaust


For maximum flexibility, all front panel function and controls have equivalent programming and monitoring functions on the included rear 37-pin analog-digital I/O connector and on the computer programming interface.

A Version Front Panel (MTA)

The A Version front panel provides a digital display with rotary front panel input, isolated 37-pin analog-digital I/O, and a RS232 computer interface.

D Version Front Panel (MTD)

In addition to the features of the A Version front panel, the D Version front panel provides digital 10-key entry, auto-sequencing with memory capability, and modulation for non-linear power profile emulation.

C Version Front Panel (MTC)

The C Version front panel is blank, providing only a switch to enable control power. All control must be performed by the provided isolated 37-pin analog-digital I/O or through a computer interface.


  • Engages and disengages main power


Meters display output voltage, output current, voltage set point, current set point, over voltage trip, and over current trip


Over voltage trip and over current trip setting potentiometers


  • POWER: Indicates power output
  • STANDBY: Indicates control power only


  • REM SEN: Remote sense enabled
  • INT CTL: Front panel start/stop/clear enabled
  • EXT CTL: External start/stop/clear enabled
  • ROTARY: Front panel rotary knob input
  • KEYPAD: 10-digit numeric keypad control
  • EXT PGM: External analog voltage-current control
  • REMOTE: Computer control


Diagnostic Alarms
  • LOCK: Interlock
  • PGM LN: External input voltage beyond limits
  • OVT: Over voltage protection has tripped
  • OCT: Over current protection has tripped
  • THERM: Over temperature condition
  • PHASE: Under voltage AC input
  • FSE: Warns that a fuse has cleared
  • ARM: Indicates power supply is ready for or operating in auto-sequencing


Power switch energizes control circuits without engaging main power Diagnostic Alarms


Stepless rotary knob to set voltage-current


Function Keys
  • MENU: Selects function
  • ITEM: Selects item within function
  • V/I DIS: Displays voltage-current settings
  • TRIP DIS: Displays OVT and OCT setting
  • CLEAR: Clears settings or resets fault
  • ENTER: Select item


Memory location indicator, used for auto-sequencing applications


Digital input keypad

Front Side Dimensions 100 kW and 150 kW Models

Front Side Dimensions 250 kW Models

Rear Side Dimensions 100 kW and 150 kW Models

Rear Side Dimensions 250 kW Models

High Voltage Output Bus 
Models Above 1000 Vdc

Medium Voltage Output Bus 
Models 80 Vdc to 1000 Vdc

Low Voltage Output Bus 
Models below 80 Vdc


Front Panel Controller


Air Exhaust Fans


Front and Rear Air Intake


Computer and External Control Connections


DC Output Bus (See Details Below)


Input AC Breaker


Input AC Power Entry 
Qty (4) 3/8-16 1.5” Studs

Note: 150 kW model pictured in diagrams titled "100 kW and 150 kW Models." 100 kW models will have the front panel on the left side as opposed to the right.