Atec AMX User Manual

AMX Series

SINGLE AND THREE

PHASE AC POWER

SOURCES

500 VA

12,000 VA

TAKE CONTROL OF Y OUR A C TEST PO WER

The AMX Series is a family of High Performance Linear AC power sources covering the power range from 500 VA to 12 kVA. The product line offers both single and three phase models. Units are conservatively designed and output power ratings are based on the most severe combination of input line, output voltage, power factor, and temperature. This approach to product design allows the AMX Series to excel when delivering the high peak load currents demanded in the AC test environment. Great emphasis has been placed on low acoustic noise, ease of installation, and maximum power per cubic inch of rack space. 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 harmonic testing and sophisticated bus programmable transient simulation.

An exceptionally broad bandwidth (50 kHz small signal) combined with peak/RMS current of 4-6:1 give the AMX Series the ability to produce high quality, low distortion output power into the most dynamic loads.

Pacific Model 308AMX with UPC Controller

KEY FEATURES PROVIDE APPLICATION VERSATILITY

• IEEE-488.2 or RS-232C with SCPI compatibility

• LabVIEW for Windows®/LabWindows® drivers

• Waveform Creation by Harmonic Synthesis

• Graphical Analysis (Voltage and Current)

• Harmonic Analysis (Voltage and Current)

• Metering of RMS and Peak Values

• Continuous Self Calibration (CSC)

• Line Sync Option

• 6:1 Peak Current Capability

• Low Impedance for IEC555 Testing

• Programmable Output Impedance

• Up to 0-300 VAC Direct Coupled Out

• 1 Phase / 3 Phase Switch Selectable

• 20-5000 Hz Full Power Bandwidth

• Power Levels from 500 VA to 12 kVA

• Externally Referenced Meter Calibration

• CE and ETL Mark available

DESIGN PROVIDES TOTAL CONTROL OF AC POWER

• All AMX Series power source models may be equipped with either a digitally programmable Oscillator/Controller (UPC type) or a manually controlled Oscillator (UMC type).

• 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 RS-232 or IEEE 488.2/ SCPI BUS. LabVIEW for Windows® and LabWindows® Instrument Drivers are available.

SPECIAL AMX 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.

PROGRAMMABLE D YN AMIC OUTPUT IMPEDANCE (OPTIONAL)

Provides positive or nega ti v e output impedance. T he output v oltage wa v eform at the right is flattened as a result of a high peak load current drawn by an electronic load at the peak of the sinewave .

Engaging the dynamic output impedance (Zº) feature dynamically compensates, as shown at the right, for the distribution or transformer losses up to ±10% of the output voltage.

WAVEFORM LIBRARY

Up to 99 different waveforms ma y be stored in the wa v eform library f or e x ecution as part of a steady state test 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. Locations 2-16 are editable and may be substituted in any output phase. Locations 19-99 are factory stored, non editable waveforms that may be copied to 2-16 for edit and execute.

WAVEFORM LIBRARY

THD=8.7%

EDIT WAVEFORM: NUMBER=16 RANGE=2-22 STARTING PHASE ANGLE=0 0-359.5° ENDING PHASE ANGLE=0 0-359.5° VOLTAGE IN PERCENT=-100 (+/-)0-100%

Oscillograph of voltage and current waveform at load due to distribution losses. THD=6.6%

Same conditions with programmable Zo engaged. THD=0.25%

THD=22.2%

THD=18.1%

WAVEFORM EDIT

Provides the ability to modify a stored wav eform by specifying the waveform amplitude desired at each specific phase angle. This method can be used to quickly create spikes, dropouts, notches and other sub-cycle wav e conditions. The resulting modified waveform can be stored for e x ecution.

W AVEFORM ANAL YSIS (OPTIONAL)

Provides both a graphic and numeric display of the harmonic structure of a voltage or current waveform. The w a v eform is sampled at 512 samples per cycle using a 12 bit A/D converter. The resulting high f idelity w a v eform is analyzed for its harmonic structure up through the 51st harmonic. Data presented includes the magnitude of each harmonic in %, the total harmonic distortion, and the odd and even harmonic distortion in %.

WAVEFORM SYNTHESIS (OPTIONAL)

Provides the ability to quickly create virtually any AC T est Wav eform that may be required by building it out of harmonics. The process is as simple as ke ying in the harmonic multiple, the amplitude, and the phase angle for each desired harmonic up through the 51st. If desired, waveforms may also be created in the time domain by making entries from the front panel or by downloading from a host PC.

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 .

WAVEFORM EDIT

024

SELECT ITEM TO GRAPH

CURRENT VOLTAGE

PHASE A

WAVEFORM UNDER ANALYSIS

10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 41

% THD

12.9

HARMONIC CONTENT OF

% OHD

12.9

% EHD

0.6

%CONTENT

10.0

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

HARMONIC CONTENT OF

WAVEFORM SYNTHESIS: WAVEFORM #2 HARMONIC: 2nd 3rd 4th 5th 6th CONTENT: .1% 0% 0% 0% 0% ØANGLE: 0° 0° 0° 0° 0°

WaAVEFORM SYNTHESIS

GPIB address

FREQ

400.00

Vrms

115.6

Irms

115.6

Ipeak

0.00

0.0000

KVA

0.0000

1.0

HARMONIC#

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. T he waveform being substituted can be selected and/or modif ied from the waveform library. Substitution is for an integer number of cycles, regardless of frequency.

TIME BASED TRANSIENTS

CYCLE BASED TRANSIENTS

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