APS Dynamics DUAL-MODE^™ Power Amplifier

The APS Dynamics DUAL-MODETM Power Amplifier is shown with an HP 35670A Dynamic Signal Analyzer. The amplifier is used to power an APS long stroke electro-dynamic shaker.  The analyzer is used to generate the drive signal (sine, random, burst random, chirp, etc.) and to acquire the vibration data.

The APS Dynamics Model 114,124, and APS 144 DUAL-MODE^™ Power Amplifiers are designed specifically to provide drive power for electrodynamic shakers. The output stage uses proven high reliability power operational amplifiers arranged to produce a balanced output.

The amplifiers have features which make them uniquely suited for studying the dynamic characteristics of structures. They may be operated in either a voltage or current amplifier mode selectable from the front panel. This operating mode selector switch facilitates shaker drive power interruption, in either a current or voltage mode for observation of resonance decay in structures.

The completely self-contained units are packaged in rugged aluminum enclosures suitable for bench or rack mounting. Forced air cooling and massive heat sinks for the output devices insure continuous operation with a shaker delivering rated force into blocked, resistive or reactive loads.

A current monitor signal available on the rear panel permits monitoring of the instantaneous output current amplitude and phase. Electronic protection circuitry will detect an output short-to-ground or overload conditions and remove the drive signal.

The Models 114-EP and 124-EP feature an "extended power" option which provide higher peak power with the same average power of the basic model. These models are recommended for random excitation.

Features

• Voltage and Current Amplifier
• Current Monitor Signal
• Protection Circuitry
• Forced Air Cooling
• Delivers Rated Current to Shaker with blocked armature, resonant loads and reactive loads
• High Reliability Operation

Specification

• Average Output, into shaker reactive load: 125 V-A rms (114), 250 V-A rms (124), 500 V-A rms (144)
• Peak Output, into shaker reactive load: 250 V-A rms (114), 375 V-A rms (114-EP), 500 V-A rms (124), 750 V-A rms (124-EP),1000 V-A rms (144)
• Current Output, peak (random noise): 6 A peak (114), 9 A peak (114-EP), 12 A peak (124), 18 A peak (124-EP), 24 A peak (144)

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Last modified: December 20, 2006