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MT Series

Magna-Power Electronics MT Series uses the same reliable current-fed power processing technology and controls as the rest of the MagnaDC programmable power supply product line, but with larger high-power modules: individual 150 kW and 250 kW power supplies. The high-frequency IGBT-based MT Series units are among the largest standard switched-mode power supplies on the market, minimizing the number of switching components when comparing to smaller module sizes. Scaling in the multi-megawatts is accomplished using the UID47 device, which provides master-slave control: one power supply takes command over the remaining units, for true system operation. As an added safety measure, all MT Series units include an input AC breaker rated for full power.

250 kW modules come standard with an embedded 12-pulse harmonic neutralizer, ensuring low total harmonic distortion (THD). Even higher quality AC waveforms are available with an external additional 500 kW 24-pulse or 1000 kW 48-pulse harmonic neutralizers, designed and manufactured exclusively by Magna-Power for its MT Series products.

Key Features

  • 49 models
  • Heavy-duty floor-standing enclosure
  • Expandable into the multi-megawatts
  • 150 kW to 2,000 kW+ output power
  • 32 Vdc to 6000 Vdc output voltage
  • 25 Adc to 6000 Adc single unit output current
  • High-power harmonic neutralizers
  • SCPI Remote Programming API
  • High Accuracy Measurements
  • Programmable Protection Limits
  • NI LabVIEW™ and IVI Driver

Build-Time: 13-16 Weeks

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Current-Fed Topology: Robust Power Conversion

All MagnaDC programmable DC power supplies utilize high-frequency IGBT-based power processing in current-fed topology. This topology adds an additional stage over the conventional voltage-fed topology for enhanced control and system protection, ensuring that even under a fault condition, the power supply will self-protect. Due to the self-protecting characteristics of this topology, the possibility of fast rising current spikes and magnetic core saturation is eliminated.

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MT Series Current-Fed Topology Image
MT Series Made in the USA Image

Made in the USA, Available Worldwide

For complete control of quality, MagnaDC programmable DC power supplies are designed and manufactured at Magna-Power's vertically integrated USA manufacturing facility in Flemington, New Jersey. Heat-sinks and various metal assemblies are machined from aluminum. Sheet metal is cut, punched, sanded, bent, and powder coated in-house. Magnetics are wound-to-order from validated designs based on a model's voltage and current. A full surface mount technology (SMT) with multiple stages of 3D automated optical inspection ensure high-quality board assemblies. Finally after assembly, products undergo comprehensive test and calibration, followed by an extended burn-in period.

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Standard Safety Features

MagnaDC programmable DC power supplies have extensive diagnostic functions, including:

  • AC Phase Loss
  • Excessive Thermal Conditions
  • Over Voltage Trip (Programmable)
  • Over Current Trip (Programmable)
  • Cleared Fuse
  • Excessive Program Line Voltage
  • Interlock Fault

When in standby or diagnostic fault, the AC mains are mechanically disconnected by an embedded AC contactor, providing confidence that the unit is only processing power when desired.

Finally, with a dedicated +5V interlock input pin and included +5V reference on all models, external emergency stop systems can be easily integrated using an external contact.

Limitless Programming Capabilities

With support for Standard Commands for Programmable Instrumentation (SCPI), MagnaDC power supplies provide an easy to use API with ASCII commands in readable text. Over 40 commands allow programmatic access to product registers, starting and stopping the product, control of voltage and current, high-accuracy measurement queries, and product configuration. Simple scripting or complex software can be achieved, with extensive documentation and examples provided by Magna-Power.

MagnaDC power supplies include RS232 communication interface standard with optional LXI TCP/IP Ethernet (+LXI) and IEEE-488 GPIB (+GPIB) options.

SCPI Command Listing

import serial
magnaPower = serial.Serial(port='COM4', baudrate=19200)
print magna_power.readline()
magnaPower.write('VOLT 0\n'.encode())
magnaPower.write('CURR 0\n'.encode())
magnaPower.write('VOLT 270\n'.encode())
currSetPoints = [50, 100, 150, 250]
for currSetPoint in currSetPoints:
    print 'Setting Current to %s A' % currSetPoint
    magnaPower.write('CURR {0}\n'.format(currSetPoint).encode())
    print magnaPower.readline()
magna_power = serial('COM4', 'BaudRate', 19200);
idn = fscanf(magnaPower);
fprintf(magnaPower,'VOLT 0');
fprintf(magnaPower,'CURR 0');
fprintf(magnaPower,'VOLT 270');
for currSetPoint in [50, 100, 150, 250]
    display('Setting Current to '+currSetPoint+' A');
    fprintf(magnaPower, 'CURR '+currSetPoint);
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <windows.h>

int main()
    printf("Opening connection.\n");

    uint8_t recvBuffer[sizeof(uint8_t) * 256];
    memset(recvBuffer, 0, 256);

    // Choose the serial port name.  
    // COM ports higher than COM9 need the \\.\ prefix, which is written as
    // "\\\\.\\" in C because we need to escape the backslashes.
    const char* device = "\\\\.\\COM4";

    // Choose the baud rate (bits per second).  
    uint32_t baud_rate = 9600;

    HANDLE port = open_serial_port(device, baud_rate);
    if (port == INVALID_HANDLE_VALUE) { return 1; }

    char* scpiCmd = (char*)"*IDN?\n";
    size_t cmdLen = strlen(scpiCmd);
    int result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;
    result = read_port(port, recvBuffer, 256);
    printf("Sent: %s\nReceived: %s\n", scpiCmd, recvBuffer);
    scpiCmd = (char*)"VOLT 0\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    scpiCmd = (char*)"CURR 0\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    scpiCmd = (char*)"OUTP:START\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    scpiCmd = (char*)"VOLT 270\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;

    char setPoints[4][5] = {"50", "100", "150", "200"};
    char setPointBuffer[40];
    scpiCmd = (char*)"MEAS:VOLT?\n";

    for (int i = 0; i < 4; i++)
        sprintf(setPointBuffer, "CURR %s\n", setPoints[i]);
        printf("Setting current to %s A\n", setPoints[i]);
        cmdLen = strlen(setPointBuffer);
        result = write_port(port, (uint8_t*)setPointBuffer, cmdLen);
        if (result < 0)
            return -1;
        memset(recvBuffer, 0, 256);
        result = read_port(port, recvBuffer, 256);
        printf("Received: %s\n", recvBuffer);
        Sleep(20000);  // 20000ms = 20s

    scpiCmd = (char*)"OUTP:STOP\n";
    cmdLen = strlen(scpiCmd);
    result = write_port(port, (uint8_t*)scpiCmd, cmdLen);
    if (result < 0)
        return -1;


    printf("Connection closed.\n");
    return 0;
using System;
using System.IO.Ports;
using System.Threading;

namespace SerialCommunicationInCSharp
  public class Program
    static bool _continue;
    static SerialPort serialPort;

    public static void Main(string[] args)
      Thread readThread = new Thread(Read);

      Console.WriteLine("Opening connection.");

      // Create a new SerialPort object with default settings.
      serialPort = new SerialPort("COM4", 19200, Parity.None, 8, StopBits.One);

      // Set the read/write timeouts
      serialPort.ReadTimeout = 500;
      serialPort.WriteTimeout = 500;

      _continue = true;

      Console.WriteLine("Sending: *IDN?");

      serialPort.WriteLine("VOLT 0");
      serialPort.WriteLine("CURR 0");
      serialPort.WriteLine("VOLT 270");

      string[] currSetPoints = { "50", "100", "150", "250" };
      for(int i = 0; i < currSetPoints.Length; i++)
        serialPort.WriteLine(String.Format("'CURR {0}", currSetPoints[i]));


      Console.WriteLine("Closing connection.");
      _continue = false;

    public static void Read()
      while (_continue)
          string message = serialPort.ReadLine();
          Console.WriteLine("Received: " + message);
        catch (TimeoutException) { }

High Performance Master-Slave Operation

All MagnaDC programmable DC power supplies come with master-slaving capability.

The MagnaDC master-slaving strategy helps to ensures no degradation in performance as units are added in parallel or series by providing gate drive signals directly from the master to the slave units. This strategy ensures one control loop for the system and eliminates the noise susceptibility commonly found when sending analog control references over long distances.

The Universal Interface Device 47 (UID47) accessory eases master-slave parallel or series configuration of Magna-Power DC power supplies, enabling near equal current or voltage sharing, depending on the configuration.

Master-slave series operation is supported to combined voltages up to the product's DC Output Isolation specification. No external blocking diodes are requires for series operation.

MT Series External User I/O Image

External User I/O for Analog and PLC Control

Using the standard rear isolated 37-pin user I/O connector, the MagnaDC programmable power supplies can be completely controlled and monitored using external signals. The voltage, current, over voltage and over current set points can be set by applying a 0-10V analog signal. Remote start, stop, clear and interlock (emergency stop tie-in) are controlled by applying a 5V digital signal. Each diagnostic condition is given a designated pin, which reads +5V when high. Reference +5V and +10V signals are provided, eliminating the need for external voltage signals and allowing the use of dry contacts.

All communications and user I/IO pins are isolated from the output terminals and referenced to earth-ground as standard.

User I/O Pinout Definitions

Magna-Power Software, NI LabVIEW Drivers, and IVI Drivers

All MagnaDC power supplies come standard with an IVI driver and an NI LabVIEW driver featuring a full set of VIs. Get started quickly with either driver using included example programs.

Magna-Power's included Remote Interface Software (pictured) provides an easy and intuitive method to operate a Magna-Power Electronics power supply with computer control. The software includes a virtual control panel, command panel to explore available commands, register panel to monitor the power supply status, calibration panel for recalibrating internal digital potentiometers, firmware panel for upgrading firmware, and a finally a modulation panel to emulate non-linear profiles.

All communication interfaces are supported across the various methods to program MagnaDC power supplies.

MT Series Software + Drivers Image

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.

MT Series Harmonic Neutralization Image

Front Panel - Standard

Front Panel - Standard

Front Panel - C Version

Front Panel - C Version
Power switch energizes control circuits without engaging main power
Engages and disengages main power via integrated mechanical contactor
Meters display output voltage, output current, voltage set point, current set point, over voltage trip and over current trip
Stepless rotary knob to set voltage-current
POWER: Indicates power outputSTANDBY: 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
EXT PGM: External analog voltage-current control
REMOTE: Computer control
Diagnostic Alarms
LOC: Interlock
PGL: External input voltage beyond limits
PHL: Under-voltage AC input
THL: Over-temperature condition
OVT: Over-voltage protection has tripped
OCT: Over-current protection has tripped
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 autosequencing applications
Digital input keypad

Model Ordering Guide

For both ordering and production, MT Series models are uniquely defined by several key characteristics, as defined by the following diagram:

MT Series Ordering Guide

MT Series Models

There are 49 different models in the MT Series spanning power levels: 150 kW, 250 kW, 500 kW, 750 kW, 1000 kW+. To determine the appropriate model:

  1. Select the desired Max Voltage (Vdc) from the left-most column.
  2. Select the desired Max Current (Adc) from the same row that contains your desired Max Voltage.
  3. Construct your model number according to the model ordering guide.
  150 kW 250 kW 500 kW* 750 kW* 1000 kW*    
Max Voltage (Vdc) Max Current (Adc) Ripple (mVrms) Efficiency
32 4500 N/A N/A N/A N/A 40 90%
40 3750 6000 12000 18000 24000 40 91%
50 3000 5000 10000 15000 20000 50 91%
60 2500 4160 8320 12480 16640 60 91%
80 1850 3000 6000 9000 12000 60 91%
100 1500 2500 5000 7500 10000 60 91%
125 1200 2000 4000 6000 8000 100 91%
160 900 1500 3000 4500 6000 120 91%
200 750 1250 2500 3750 5000 125 91%
250 600 1000 2000 3000 4000 130 92%
300 500 833 1666 2499 3332 160 92%
375 400 660 1320 1980 2640 170 92%
400 375 625 1250 1875 2500 180 92%
500 300 500 1000 1500 2000 220 92%
600 240 400 800 1200 1600 250 92%
800 180 300 600 900 1200 300 92%
1000 150 250 500 750 1000 400 92%
1250 120 200 400 600 800 500 92%
1600 90 150 300 450 600 600 92%
2000 75 125 250 375 500 800 92%
2500 60 100 200 300 400 900 92%
3000 50 80 160 240 320 1000 92%
4000 36 60 120 180 240 1100 92%
5000 30 50 100 150 200 92%
6000 25 41.6 83.2 124.8 166.4 92%
AC Input Voltage (Vac) Input Current Per Phase (Aac)    
380/415 Vac, 3Φ 276 440 880 1320 1760    
440/480 Vac, 3Φ 238 380 760 1140 1520    

* Power levels marked with an asterisk are achieved through master-slave parallel of 250 kW models. Contact sales for more information or to inquire for systems as large as 4,000 kW+.


The following specifications are subject to change without notice. Unless otherwise noted, all specifications measured at the product's maximum ratings.

AC Input Specifications
Specification Value
3Φ AC Input Voltage
Available on all models
380/400 Vac (operating range 342 to 440 Vac)
415 Vac (operating range 373 to 456 Vac)
440 Vac (operating range 396 to 484 Vac)
480 Vac (operating range 432 to 528 Vac)
Input Frequency 50 Hz to 60 Hz
Power Factor > 0.92 at maximum power, 100 kW and 150 kW models
> 0.96 at maximum power, 250 kW models
AC Input Isolation ±2500 Vdc, maximum input voltage to ground
DC Output Specifications
Specification Value
Voltage Ripple Model specific. Refer to chart of available models.
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
Stability ± 0.10% for 8 hrs. after 30 min. warm-up
Efficiency 90% to 92%
Model specific. Refer to chart of available models.
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%
Maximum Slew Rate
Models with High Slew Rate Output (+HS) Option
4 ms for an output voltage change from 0 to 63%
8 ms for an output current change from 0 to 63%
Standard Models
3 Hz with remote analog voltage programming
2 Hz with remote analog current programming
Models with High Slew Rate Output (+HS) Option
60 Hz with remote analog voltage programming
45 Hz with remote analog current programming
DC Output Isolation
Models Rated ≤1000 Vdc
±1000 Vdc, maximum output voltage to ground
DC Output Isolation
Models Rated >1000 Vdc or Models with +ISO Option
±6000 Vdc, maximum output voltage to ground
Programming Interface Specifications
Specification Value
Front Panel Programming Stepless aluminum rotary knobs and keypad
Computer Interface RS232, D-sub DB-9, female (Standard)
LXI TCP/IP Ethernet RJ45 (Option +LXI)
IEEE-488 GPIB (Option +GPIB)
External User I/O Port 37-pin D-sub DB-37, female
Referenced to Earth ground; isolated from power supply output
See User Manual for pin layout
Remote Sense Limits (Wired)
Available for models ≤ 1000 Vdc without High Isolation Output (+ISO) option
3% maximum voltage drop from output to load
Accuracy Specifications
Specification Value
Voltage Programming Accuracy ± 0.075% of max rated voltage
Over Voltage Trip Programming Accuracy ± 0.075% of max rated voltage
Current Programming Accuracy ± 0.075% of max rated current
Over Current Trip Programming Accuracy ± 0.075% of max rated current
Voltage Readback Accuracy ± 0.2% of max rated voltage
Current Readback Accuracy ± 0.2% of max rated current
External User I/O Specifications
Specification Value
Analog Programming and Monitoring Levels 0-10 Vdc
Analog Output Impedances Voltage output monitoring: 100 Ω
Current output monitoring: 100 Ω
+10V reference: 1 Ω
Digital Programming and Monitoring Limits Input: 0 to 5 Vdc, 10 kΩ input impedance
Output: 0 to 5 Vdc, 5 mA drive capacity
Physical Specifications
Specification Value
Size and Weight
100 kW Models
Floor-standing double-bay 19" cabinet with casters
67" H x 48" W x 31.5" D (170.2 x 121.9 x 80.0 cm)
1600 lbs (725.8 kg)
Size and Weight
150 kW Models
Floor-standing double-bay 19" cabinet with casters
67" H x 48" W x 31.5" D (170.2 x 121.9 x 80.0 cm)
2100 lbs (952.5 kg)
Size and Weight
250 kW Models
Floor-standing triple-bay 19" cabinet with casters
67" H x 72" W x 31.5" D (170.2 x 182.9 x 80.0 cm)
3300 lbs (1496.9 kg)
Environmental Specifications
Specification Value
Ambient Operating Temperature 0°C to 50°C
Storage Temperature -25°C to +85°C
Humidity Relative humidity up to 95% non-condensing
Temperature Coefficient 0.04%/°C of maximum output voltage
0.06%/°C of maximum output current
Air Flow Front and rear inlet, top exhaust
Regulatory Specifications
Specification Value
EMC Complies with 2014/30/EU (EMC Directive)
CISPR 22 / EN 55022 Class A
Safety Complies with EN61010-1 and 2014/35/EU (Low Voltage Directive)
CE Mark Yes
RoHS Compliant Yes

Dimensional Diagrams

The following are vectorized diagrams for the MT Series. Refer to the Downloads section for downloadable drawings.

Front Side
150 kW Models
Rear Side
150 kW Models
Front Side
250 kW Models
Rear Side
250 kW Models
DC Output Bus
Models Rated 50 Vdc and Below
DC Output Bus
Models Rated 60 Vdc through 1000 Vdc
DC Output Bus
Models Rated Greater than 1000 Vdc or with High Isolation Output Option (+ISO)

Options and Accessories

The following are options and accessories developed specifically for Magna-Power's MT Series


External accessories and integration services are available for Magna-Power products


The following downloads are for the MT Series:


MT Series Datasheet [4.5.1] [EN] [PDF]
MT Series Datasheet [4.5.1] [ZH] [PDF]
MT Series Datasheet [4.4.0] [EN] [PDF]
MT Series Datasheet [4.4.0] [ZH] [PDF]
MT Series User Manual [6.0] [EN] [PDF]


MagnaDC IVI Driver [] [MSI]
LabWindows Driver [1.02] [ZIP]


Photovoltaic Power Profiles Emulation [] [ZIP] [License Required]