LeCroy WS10-PWR - Power Analysis Option for WaveSurfer 10

Power Analyzer Package

Quickly Measure and Analyze Operating Characteristics of Power Conversion Circuits
Critical power switching device measurements, control loop modulation analysis, and line power harmonic testing are all simplified with a dedicated user interface and automatic measurements. Power Analyzer provides quick and easy setup of voltage and current inputs and makes measurements as simple as the push of a button. Tools are provided to help reduce sources of measurement errors, measurement parameters provide details of single cycle or average value over multiple cycles.

Line Power and Harmonics Testing
Line power analysis tools provide insight to power consumption as well as enables quick precompliance testing to EN 61000-3-2. Decisions on power quality are aided with total harmonic distortion and analysis of contributions to distortion.

Support on Multiple Oscilloscope Platforms
The Power Analyzer Package is available on a wide range of oscilloscope models from 200 MHz to 65 GHz.

Power Device Analysis

Switching transitions, conduction losses and off-sate losses are color-coded and automatically calculated.
Measurements are displayed as energy (joules), mean or peak power (watts).
For discontinuous supplies, off-state loss provides an excellent tool to fine adjust a current probe’s
DC offset and improve measurement accuracy.

Analyze power device performance while the device is operating in circuit. Easily make switching loss, dynamic-on resistance, dv/dt and di/dt measurements. Quickly view safe operating area and B-H hysteresis curves.

Power Device Losses
Turn-on, turn-off and conduction zones are identified with a colorcoded overlay, power losses in these zones are automatically measured and displayed. Losses associated with the switching, conduction, and off-state are measured independently and displayed along with the sum of selected loss types.

Safe Operating Area
Gain insight to circuit performance by seeing SOA plots to look for violations in the first cycles after an event or over long time periods. Finding SOA violations that occur for only a few cycles after an event, such as short circuit or startup, can be problematic. These violations often go undetected, and degrade the device over time. Using the long record length and fast processing of Power Analyzer, SOA display on very long records, confirm turn-off voltage and current limits are not exceeded.

B-H Hysteresis Curve
View the behavior of a magnetic device while it operates in circuit. Dynamic circuit changes show resulting magnetic saturation and operating region.

Teledyne LeCroy’s HDO4000 and HDO6000 High Definition Oscilloscopes with 12-bit HD4096 technology are the ideal oscilloscope for power measurement. With 16x more resolution than a traditional 8-bit oscilloscope signal details of the saturation voltage are now clearly visible and conduction losses are more accurate.

Modulation and Line Harmonics Analysis

Triggered by the step change in load current (red trace), the gate-drive modulated signal(yellow traces) is
captured, the closed-loop, time-domain response of the feedback loop (blue trace)
is displayed, confirming loop performance.

Control Loop Analysis
View time domain display which graphically presents the modulated parameter in a time vs. parameter value graphical plot. A controller’s output pulse widths, duty cycles or frequencies, are individually plotted and time correlated with the controller’s output. Integrated with the oscilloscope’s triggering capabilities, this analysis is a convenient tool for intuitively viewing the time domain, closed-loop response of the entire control loop, including any time constants added by the pulse width modulator.

Both tabular and graphical displays provide conducted emissions for Class A, B, C, or D
equipment as compared to standard templates of the EN 61000-3-2. The blue mask
shows the test limits for compliance at each current harmonic.

Line Power Analysis
Easily measure an off-line power supply’s incoming RMS line voltage, RMS current consumption (in watts and VA), Power Factor, Apparent Power, Real Power and Crest Factor. Line current harmonic measurements are made and compared to standard templates for EN 61000-3-2 Class A, B, C, or D equipment. Results can be displayed graphically to see mask violations or in a table with test results. Total harmonic distortion measurements are provided with details of which frequencies are contributing to the distortion.