Série MT Alimentation DC Programmable
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 100 kW, 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.
Overview
Fully Programmable DC Power
The MT Series features programmable voltage, current, and protection settings along with high accuracy measurements. The MT Series functions and features are accessible and configurable from a variety of control methods, including:
- Front panel interface with stepless knobs
- 37-pin isolated analog-digital user I/O
- RS232 Computer interface with software and drivers
Various additional programming interfaces are available, such as LXI TCP/IP Ethernet (+LXI), IEEE-488 GPIB (+GPIB), Edgeport USB Accessory (+USB), RS485 Accessory (+RS485).
Designed for Safety
MT Series 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.
Extensive Programming Support
All MT Series MagnaDC power supplies come with a dedicated National Instruments LabVIEW™ driver, Interchangeable Virtual Instrument (IVI) driver, and support for a wide range of Standard Commands for Programmable Instrumentation (SCPI). These programming interfaces support full control, measurement, and monitoring of the MagnaLOAD. All of the MagnaLOAD's available communication interfaces are supported by these drivers and command sets, including: RS232, LXI TCP/IP Ethernet, IEEE-488 GPIB, USB or RS485.
Showcased in the following basic code examples, SCPI commands provide the simplest form of communication by using plain ASCII text and parameters sent over a basic socket connection. Over 50 commands are provided, with detailed documentation in the MT Series User Manual.
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
import visa
rm = visa.ResourceManager()
magna_power = rm.open_resource(USB::0x0403::0x6015::1201-2358::INSTR)
magna_power.write('*IDN?')
magna_power.read()
magna_power.write('VOLT 1000')
magna_power.write('CURR 20')
magna_power.write('INP:START')
magna_power = visa('ni','USB::0x0403::0x6015::1201-2358::INSTR');
fopen(magna_power)
fprintf(magna-power,'*IDN?')
idn = fscanf(magna_power)
fprintf(magna-power,'VOLT 1000')
fprintf(magna-power,'CURR 20')
fprintf(magna-power,'INP:START')
string resourceString = "USB::0x0403::0x6015::1201-2358::INSTR";
mbSession = (MessageBasedSession)ResourceManager.GetLocalManager().Open(resourceString);
string idn;
mbSession.Timeout = 3000;
idn = mbSession.Query("*IDN?");
mbSession.Write("VOLT 1000");
mbSession.Write("CURR 20");
mbSession.Write("INP:START");
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.
In addition to its robust topology, key performance characteristics of MagnaDC programmable DC power supplies include:
- High-accuracy voltage and current programming accuracy
- Class-leading line and load regulation performance
- High 3Φ AC input power factor with in-rush limiting circuitry
- Computer and user I/O isolated from the power supply output
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.
Front Panel - D Version
The standard D Version front panel offers front panel provides a digital display with rotary front panel input, isolated 37-pin analog/digital I/O, and a RS232 computer interface. In addition, the D Version front panel provides digital 10-key entry, auto-sequencing with memory capability, and modulation for non-linear power profile emulation.
Front Panel - C Version
The C Version front panel is blank, providing on 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.
Designed and Manufactured 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 chassis are machined from aluminum. All sheet metal is fabricated and powder coated in-house. Magnetics are wound-to-order from validated designs based on a model's voltage and current. An automated surface-mount production line places components on printed circuit boards for control, driver, auxiliary power, and display circuits. And finally after assembly, products undergo comprehensive test and calibration, followed by an extended burn-in period.
Models
There are 72 different models in the MT Series spanning power levels: 100 kW, 150 kW, 250 kW, 500 kW, 750 kW, 1000 kW+.
To determine the appropriate model:
- Select the desired Output Voltage Maximum (Vdc) from the left-most column.
- Select the desired Current Maximum (Adc) from the same row that contains your desired Voltage Maximum.
- Construct your model number according to the model ordering guide.
| 100 kW | 150 kW | 250 kW | 500 kW* | 750 kW* | 1000 kW* | |||
|---|---|---|---|---|---|---|---|---|
| Voltage Maximum (Vdc) | Current Maximum (Adc) | Ripple (mVrms) | Efficiency | |||||
| 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 | 4000 | N/A | 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% |
| 60 | 1660 | 2500 | 4160 | 8320 | 12480 | 16640 | 60 | 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% |
| 300 | 333 | 500 | 833 | 1666 | 2499 | 3332 | 160 | 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 | 50 | 80 | 160 | 240 | 320 | 1000 | 92% |
| 4000 | 24 | 36 | 60 | 120 | 180 | 240 | 1100 | 92% |
| AC Input Voltage (Vac) | Input Current Per Phase (Aac) | |||||||
| 380/415 Vac, 3Φ | 184 | 276 | 440 | 880 | 1320 | 1760 | ||
| 440/480 Vac, 3Φ | 159 | 238 | 380 | 760 | 1140 | 1520 | ||
Specifications
Diagrams
Learn
White Papers
An Overview of Current-Fed Power Processing
Control Loop Modulation Applied to Programmable DC Power Supplies
Getting the Best Performance from AC to DC Power Supplies in Abusive Environments
Peak-to-Peak Output Voltage Measurements of Switching Power Supplies
Current-Fed Power Processing—Ride Through Robustness
Knowledge Base
| Article Title | Category |
|---|---|
| Product shipping weights and dimensions | Logistics |
| Amount of capacitance on the power supply's output | Specifications |
| Configuring the power supply for computer control | Programming |
| Export classification code and harmonized tariff code | Logistics |
| RS232 interface configuration settings | Programming |
| MPE IVI driver installation and configuration | Programming |
| Slew rate and the available configurations | Specifications |
| Calculating the regulated output impedance | Specifications |
| Output bleed resistance | Specifications |
| Interfacing with MATLAB through RS232 | Programming |
| Instrumentation Programming with Python | Programming |
How to Buy
In the USA and Canada, Magna-Power sells it products directly from the factory, with a North American network of technical representatives. Magna-Power products are available worldwide through direct sales offices and authorized distributors. Requests from this form will either be quoted directly or automatically routed to the appropriate sales partner for quote.
Build-time
Magna-Power products are made-to-order with build-times that vary depending on the model's maximum power rating. The current build-time for the MT Series is 6-8 weeks.
Sales Partners
In the USA and Canada, Magna-Power sells it products directly from the factory, with a nationwide network of technical representatives. Magna-Power products are available available worldwide through direct sales offices and authorized distributors. Requests from this form will either be quoted directly or automatically routed to the appropriate sales partner for quote.
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