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.
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.
Provides for exceptional accuracy of the AC output Voltage. When enabled, accuracy improves to ±0.03% referenced to the power source internal voltmeter.
Provides the ability to modify a stored waveform by specifying the waveform amplitude desired at each specific phase angle.
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):
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 %.
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.
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.
Provide the ability to create and execute on command, transients that occur linearly over a specified time segment to modify output voltage or frequency.
Provide the ability to create and execute, on command, transients that substitute a selected waveform in the output for 1 to 100 cycles.
15 to 5000 Hz. Full Power
0.1% max for a 10% line change
Resistive -100 Ohm to +100 Ohm, Inductive 0 to 2 mH
0.25% 15 to 2000 Hz. 0.5% 2000 to 5000 Hz. Can be improved to less than 0.03% with CSC engaged
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%
5µsec. typical to a step load change.
5 Hz. to 50 kHz, typical.
All models are designed for operation in 19 inch equipment racks. Models above 1800 VA have side handles for ease of handling.
Standard 19 inch rack. Slide rails are available as an option for all models.
See model table above for panel height.
Will not exceed 24 inches from the front panel to the rear of the chassis, including connectors, handles and cabling.
Forced air, front or side intakes, rear exhaust with auto fan speed control for low acoustic noise operation.
The LMX controller is essentially a single or three phase AC arbitrary waveform generator and Precision AC metering system. The waveform for each phase may be independently selected and may be independently varied in amplitude and phase angle with respect to phase A (3 phase systems).
The metering function samples the output volts and amps at 1024 samples per measurement using a 16 bit A/D converter. This technique provides exceptional metering accuracy and resolution and delivers a high-fidelity waveform back to a host computer for analysis.
The LMX includes LAN, USB, IEEE 488.2 and RS232 interfaces using SCPI commands.
Programmable, 0-VMAX, in 0.1 volt steps (see table).
Phase Angle (f) of Phases B and C relative to Phase A is programmable from 0-359° in 1° increments ± 0.5°.
Current limit is programmable from 0 to I peak maximum of the power source. Accuracy is ± 0.5%, resolution ±10mA.
Stores up to 200 waveforms that can be edited and executed in any manner and in any output phase.
Range: 0-340 volts L-N, 0-600 volts L-L
Resolution: 0.10VAC to front panel, 0.001VAC to remote interface
Accuracy: ±0.1% of range
Range: 100% of system current rating
Resolution: 0.01 Arms
Accuracy: ± (0.5% + f (kHz) * 0.5%) F.S.
Range: Based on ammeter range
Resolution: 1 W, 1 VA (front panel)
or 0.1 W, 0.1 VA remote control
Accuracy: ± 0.75% of Full Scale
Calculated and displayed to four significant digits
