DACI hardware

Data Acquisition and Control Interface - Model 9063
DATASHEET - Data Acquisition and Control Interface

All inputs and outputs are protected against improper connections and overvoltage/overcurrent conditions

Analog Inputs

Isolated

four isolated, high-level voltage inputs and four isolated, high-level current inputs. All these inputs are fitted with 4-mm banana safety jacks to make connections to electric power circuits quick, safe, and easy.

Non-isolated

also has eight low-level, analog inputs which allow measurement of other circuit parameters. Two of these inputs can be used to measure torque and speed.

Analog Outputs

two software-programmable analog outputs which can be used as a function genertor or to control a dynamometer or power electronics module. all fitted with miniature (2 mm) safety banana jacks.

Digital Inputs

three digital inputs which can be monitored through the LVDAC-EMS software. Two of these digital inputs are used as an incremental encoder input (A-B) for speed measurement and the third input is used for synchronization. the three digital inputs are all fitted with miniature (2 mm) safety banana jacks to avoid accidental connection to high-level outputs.

Digital Outputs

The digital output which can be used to control power electronics like a IGBT Chopper/Inverter or Power Thyristors. This output can also be used to control other types of modules. The parallel digital output provides TTL-level signals on a 9-pin, D-type connector. two additional digital outputs that also provide TTL-level signals. All inputs and outputs of the DACI are protected against improper connections and overvoltage/overcurrent conditions

LVDAC-EMS Software

Lab-Volt Data Acquisition and Control for Electromechanical Systems Computer-Based Instrumentation Function

  • Metering
  • Data Table and Graph
  • Oscilloscope
  • Phasor Analyzer
  • Harmonic Analyzer

Metering

Metering
DATASHEET - Data Acquisition and Control Interface

The Metering window displays up to eighteen meters that can be configured to measure a multitude of parameters (e.g., voltage, current, active power, reactive power, apparent power, efficiency, impedance, power factor, frequency, energy, torque, speed, mechanical power, phase angle, phase shift). The voltage and current meters have several modes of operation that allow measurement of the mean (DC) value, RMS value, crest factor, RMS value of a particular harmonic (up to the 15th), RMS value of the harmonics, and total harmonic distortion (THD). The layout of the meters in the Metering window can be customized by the user. The name of each meter can be edited to identify the measured circuit parameter.

Data Table and Graph

Data Table and Graph
DATASHEET - Data Acquisition and Control Interface

The values indicated by the meters or indicators of all computer-based instruments and control functions (see later in this section for more detail about control functions) in LVDAC-EMS can be recorded in the Data Table window. A timer option is provided to help record data at specific time intervals. The values recorded in the Data Table can be saved to a file. The recorded data can also be used to plot graphs by selecting which parameter(s) to plot in the Graph window. This allows lab results to be plotted quickly and easily. More complex graphs can be created by exporting the contents of the Data Table window to any popular spread sheet program, such as Microsoft Excel.

Oscilloscope

Oscilloscope
DATASHEET - Data Acquisition and Control Interface

The Oscilloscope can display up to eight waveforms simultaneously. Each waveform is of a different color for easy identification. Each channel has independent vertical controls similar to those found on conventional oscilloscopes. An automatic scale setting function allows the sensitivity of each channel to be set automatically according to the magnitude of the observed parameter. The time base and trigger controls are similar to those found on most oscilloscopes. The RMS value, average value, and frequency of each of the observed parameters can be displayed in a table in the Oscilloscope window. Two vertical cursors can be activated to perform precise measurements at particular points on the displayed waveforms. The Oscilloscope has two memory channels for saving the displayed waveforms.

Phasor Analyzer

Phasor Analyzer
DATASHEET - Data Acquisition and Control Interface

The innovative Phasor Analyzer displays the phasors related to measured voltages and currents instead of the values and waveforms related to these voltages and currents. The Phasor Analyzer allows circuit voltages and currents to be monitored easily for relative amplitudes and phase differences simply by looking at their respective phasors. This produces a unique and dynamic display of the voltages and currents in a circuit (especially in three-phase circuits) that cannot be obtained with conventional instruments. The RMS value, phase angle, and frequency of the voltage or current related to each phasor are displayed in a table in the Phasor Analyzer window.

Harmonic Analyzer

Harmonic Analyzer
DATASHEET - Data Acquisition and Control Interface

The Harmonic Analyzer allows observation and analysis of the harmonic components in the measured voltages and currents. The fundamental frequency can either be set to the ac power network frequency, manually by the user, or automatically to the frequency of the fundamental component of the selected voltage or current. The number of harmonic components displayed can be varied between 5 and 40. The harmonic components of the selected voltage or current can be displayed using a vertical scale graduated in either absolute or relative values. Various vertical scale settings are available. A group of data displays in the Harmonic Analyzer indicates the values of the dc component, fundamental component, and harmonic

components of the selected voltage or current, as well as the total harmonic distortion (THD). Vertical and horizontal cursors can be activated to perform precise measurements at particular points on the display.