LMX Series – Programmable AC Power Source
High Performance Linear AC Power Source
The LMX Series encompasses an all new collection of High Performance 1 phase and 3 phase Linear AC Power Sources. All standard models operate from 15 to 5,000 Hz, range in power from 500VA to 30kVA, and provide nominal output voltage ranges up to 600Vrms L-N.
The LMX Series builds on the popularity of the original AMX Series linear AC power sources that have been the benchmark for programmable AC Power output fidelity and performance and are backward compatible with the AMX.
Linear Amplifier Provides Ultra Reliable Testing of AC Power
When high power quality matters, the new for 2020 LMX Series family of High Performance Linear AC Power Sources is the answer. The linear amplifiers within the LMX Series power sources are unmatched in their ability to produce the high crest factor, low-distortion, high fidelity output waveforms required by the most demanding AC Test Power applications. Stand-alone models range from 500 VA to 6 kVA. Larger chassis may be paralleled to create systems that range from 8kVA to 30 kVA. Offering both single and three phase models, units are conservatively designed with output power ratings based on the most severe combination of input line, output voltage, power factor, and temperature.
See Parallelable Models 8kVA-30kVA
Great emphasis has been placed on low acoustic noise, ease of installation, ease of use and safety. Control and operating features provide a high degree of application versatility and ease of use for the test engineer. Applications range from simple, manually controlled frequency conversion to power-line susceptibility testing and sophisticated bus programmable transient simulation.
The exceptionally broad bandwidth (50 kHz small signal), combined with low output impedance and high crest factor ratings give the LMX Series the ability to produce high quality, low distortion output power into the most dynamic loads.
Key Features Provide Application Versatility
- USB, LAN (LXI), IEEE-488.2 and RS-232C with SCPI compatibility
- Compatible with PPSC Studio graphical user interface
- LabVIEW for Windows®/LabWindows® drivers
- Waveform Creation by Harmonic Synthesis
- Waveform Capture (Voltage and Current)
- Harmonic Analysis (Voltage and Current)
- Metering of RMS and Peak Values
- Continuous Self Calibration (CSC)
- Line Sync
- 6:1 Peak Current Capability
- Low Impedance for EN61000-3-2, 3 Testing
- Programmable Output Impedance (R+L) both Real-Time & RMS modes
- Up to 0-300 VAC Direct Coupled Out
- 1 Phase / 3 Phase Switch Selectable
- 15-5000 Hz Full Power Bandwidth
- Power Levels from 500 VA to 6 kVA standard; 30kVA optional
- Externally Referenced Meter Calibration
- CE Safety & EMC and NTRL Safety Mark
Design Provides Total Control of AC Power
- All LMX Series power source models are equipped with our new digital Real-Time programmable Controller.
- Single phase power source models may be controlled to operate on either a 0-135 VAC range or a 0-270 VAC range. Three phase models are additionally switchable to 3ø/1ø output power form.
- Total control of the output power form and the selection of either the direct output or the optional transformer output is available from the front panel or the bus.
- All operating functions may be controlled from either the front panel or from a remote USB, LAN (LXI compliant), RS-232 or IEEE 488.2/ SCPI BUS. LabVIEW for Windows® and LabWindows® Instrument Drivers are available.
- The LMX controller supports a browser interface that allows control of the power source over LAN or USB using a web browser on PC, laptop or smartphone.
Special LMX Series Operating Features
Continuous Self Calibration:
Provides for exceptional accuracy of the AC output Voltage. When enabled, accuracy improves to ±0.03% referenced to the power source internal voltmeter.
Waveform Edit:
Provides the ability to modify a stored waveform by specifying the waveform amplitude desired at each specific phase angle.
Waveform Analysis:
Provides both a graphic and numeric display of the harmonic structure of a voltage or current waveform. Data presented includes the magnitude of each harmonic in %, the total harmonic distortion, and the odd and even harmonic distortion in %.
Programmable Dynamic Output Impedance:
Programmable Output Impedance provides the operator with dynamic control over the output impedance of the AC Power Source. Using the output current term as conditioned feedback signal to the output voltage circuits, positive or negative impedance may be programmed. The purpose of this control is to simulate the effects of or compensate for high peak current, distribution, or transformer losses of up to ±10% of the output voltage.
This feature creates positive, negative, or zero output impedance (Zo):
- Compensates for line distribution or transformer losses.
- Simulates a soft power line for product testing. Compensation range is ±10% of the output voltage.
Waveform Synthesis:
Provides the ability to quickly create virtually any AC Test Waveform that may be required by building it out of harmonics. The process is as simple as keying in the harmonic multiple, the amplitude, and the phase angle for each desired harmonic up through the 51st.
Waveform Library:
Up to 200 different waveforms can be stored in the waveform library for execution as part of a steady state program or for substitution in any output phase as part of a transient test program. Memory location #1 is a non-editable high resolution sine wave. All other locations are editable and can be substituted in any output phase. An unlimited number of waveforms may be stored on the computer.
Time Based Transients:
Provide the ability to create and execute on command, transients that occur linearly over a specified time segment to modify output voltage or frequency.
Cycle Based Transients:
Provide the ability to create and execute, on command, transients that substitute a selected waveform in the output for 1 to 100 cycles.
Solutions
AC Test Power:
The LMX Series Power Source is equipped with multiple Digital Signal Processors (DSPs) to create a fully integrated test system. It supplies a variety of power conditions to the device under test and meters/analyzes all output performance parameters.
Frequency/Voltage Conversion:
The LMX Series is an excellent source of stable AC voltage over the frequency range of 15 to 5,000 Hz. The output frequency is quartz-crystal stabilized. Output voltages up to 600 VAC are provided.
Phase Conversion:
With the ability to provide single and three-phase outputs, the LMX Series is the perfect choice to provide 1 Phase to 3 Phase or 3 Phase to 1 Phase conversion.
Dual Range Output Magnetics Options
LMX Series Power Sources can be equipped with output transformers to provide an alternate output voltage range. Selection of direct or transformer coupled range is performed by the controller via front panel or bus command. The standard frequency range for transformer coupled outputs is 45 to 5,000 Hz. Standard output ratios are 1.5:1, 2.0:1, and 2.5:1. Transformer outputs are supplied internally or externally via a Magnetics Module as listed in the above table. Consult the factory for additional information regarding special output ranges not listed above.
Specs
Power Source Specifications
Output Frequency:
15 to 5000 Hz. Full Power
Line Regulation:
0.1% max for a 10% line change
Programmable Impedance:
Resistive -100 Ohm to +100 Ohm, Inductive 0 to 2 mH
Load Regulation:
0.25% 15 to 2000 Hz. 0.5% 2000 to 5000 Hz. Can be improved to less than 0.03% with CSC engaged
Output Distortion (Vthd):
3U Models: 15~450 Hz: < 0.1%; 450~5000 Hz: < f x 0.076% + 0.07% (f in kHz) 5U & 8U Models: 45~1,000Hz: < 0.1% 1,000~5,000 Hz: < 0.25%
Ripple and Noise:
< 50 mVrms
Response Time:
5 µsec. typical to a step load change.
Small signal bandwidth:
5 Hz. to 50 kHz, typical.
Models Table
| MODEL | RATED POWER (VA) | OUTPUT FORM | OUTPUT VOLTS-MAX (VRMS) | OUTPUT AMPS (ARMS) | INPUT POWER FORM | PANEL HEIGHT (U) | WEIGHT (LBS./KG) |
| Single Phase Models | |||||||
| 105LMX | 500 | 1Ø | 135/270 | 4/2 | 1Ø | 3 | 70/31.8 |
| 108LMX | 750 | 1Ø | 135/270 | 6/3 | 1Ø | 3 | 70/31.8 |
| 112LMX | 1200 | 1Ø | 150/300 | 10/5 | 1Ø | 3 | 80/36.3 |
| 140LMX | 4000 | 1Ø | 135/270 | 32/16 | 1Ø | 8 | 185/84.0 |
| 160LMX | 6000 | 1Ø | 135/270 | 48/16 | 1Ø | 8 | 195/88.6 |
| Three Phase Models | |||||||
| 305LMX | 500 | 1Ø 3Ø | 135/270 135 (Vl-N) | 4/2 1.3 per Ø | 1Ø | 3 | 74/33.6 |
| 308LMX | 750 | 1Ø 3Ø | 135/270 135 (Vl-N) | 6/2 2 per Ø | 1Ø | 3 | 74/33.6 |
| 312LMX | 1200 | 1Ø 3Ø | 150/300 150 (Vl-N) | 10/3.3 3.3 per Ø | 1Ø | 3 | 80/36.3 |
| 320LMX | 2000 | 1Ø 3Ø | 135/270 135 (Vl-N) | 18/6 6 per Ø | 3Ø | 5 | 150/68.2 |
| 345LMX | 4500 | 1Ø 3Ø | 135/270 135 (Vl-N) | 36/12 12 per Ø | 3Ø | 8 | 190/86.3 |
| 360LMX | 6000 | 1Ø 3Ø | 135/270 135 (Vl-N) | 48/16 16 per Ø | 3Ø | 8 | 195/88.6 |
| MODEL | RATED POWER (VA) | OUTPUT FORM | OUTPUT VOLTS-MAX (VRMS) | OUTPUT AMPS (ARMS) | POWER FORM | HEIGHT (U) | WEIGHT (LBS./KG) | ||||||
| Single Phase Models | |||||||||||||
| Transformer | Transformer | ||||||||||||
| Direct | 1.5:1 | 2.0:1 | 2.5:1 | Direct | 1.5:1 | 2.0:1 | 2.5:1 | ||||||
| 105LMXT | 500 | 1Ø/2Ø | 135/270 | 202/404 | 270/540 | 338/600 | 4/2 | 2.6/1.3 | 2/1 | 1.6/0.8 | 1Ø | 3 | 97/44.0 |
| 108LMXT | 750 | 1Ø/2Ø | 135/270 | 202/404 | 270/540 | 338/600 | 6/3 | 4/2 | 3/1.5 | 2.4/1.2 | 1Ø | 3 | 97/44.0 |
| 140LMXT | 4000 | 1Ø/2Ø | 135/270 | 202/404 | 270/540 | 338/600 | 32/16 | 21.3/10.7 | 12.8/6.4 | 12.8/6.4 | 3Ø | 11 | 310/140.8 |
| 160LMXT | 6000 | 1Ø/2Ø | 135/270 | 202/404 | 270/540 | 338/600 | 48/16 | 32/10.7 | 19.2/6.4 | 19.2/6.4 | 3Ø | 11 | 320/145.4 |
| Three Phase Models | |||||||||||||
| Transformer | Transformer | ||||||||||||
| Direct | 1.5:1 | 2.0:1 | 2.5:1 | Direct | 1.5:1 | 2.0:1 | 2.5:1 | ||||||
| 305LMXT | 500 | 1Ø/2Ø 3Ø | 135/270 135/234 | 202/404 202/350 | 270/540 270/468 | 338/600 338/585 | 4 1.3/Ø | 2.6/1.3 1.0/Ø | 2/1 .75/Ø | 1.6/0.8 0.6/Ø | 1Ø | 3 | 100/45.5 |
| 308LMXT | 750 | 1Ø/2Ø 3Ø | 135/270 135/234 | 202/404 202/350 | 270/540 270/468 | 338/600 338/585 | 6/2 2/Ø | 4/1.3 1.3/Ø | 3/1 1/Ø | 2.4/0.8 0.8/Ø | 1Ø | 3 | 100/45.5 |
| 320LMXT | 2000 | 1Ø/2Ø 3Ø | 135/270 135/234 | 202/404 202/350 | 270/540 270/468 | 338/600 338/585 | 18/6 6/Ø | 12/4 4/Ø | 9/3 3/Ø | 7.2/2.4 2.4/Ø | 3Ø | 8 | 275/125 |
| 345LMXT | 4500 | 1Ø/2Ø 3Ø | 135/270 135/234 | 202/404 202/350 | 270/540 270/468 | 338/600 338/585 | 36/12 12/Ø | 24/8 8/Ø | 18/6 6/Ø | 14.4/4.8 4.8/Ø | 3Ø | 11 | 315/143.1 |
| 360LMXT | 6000 | 1Ø/2Ø 3Ø | 135/270 135/234 | 202/404 202/350 | 270/540 270/468 | 338/600 338/585 | 48/16 16/Ø | 32/10.7 10.7/Ø | 24/8 8/Ø | 19.2/6.4 6.4/Ø | 3Ø | 11 | 320/145.4 |
NOTES
- All single phase output units are operable with dual voltage ranges as listed. Three phase units are operable as single phase with dual voltage range capability or as three phase. Output voltage ranges and 1ø/3ø conversions are selected by front panel or bus commands.
- Output voltage ranges listed are for standard units. VMAX is output voltage with nominal input and full rated load applied. Other voltage ranges are available with the output magnetics options.
- Peak Repetitive Pulse Current.
- Single phase input: 100, 110, 120, 208, 220 and 240 VAC ±10%. Three phase input: 208,220,240,380,416 and 480 VAC ±10%. (480 V input and 400 Hz input are each available as a cost option.)
