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Power Electronics Characterization Techniques
Power and power applications intersect with a number of measurement tools and instruments. Capabilities include the ability to deliver voltage, current, and power as well as the ability to draw or load voltage, current, and power. Power measurements are also made using meters and oscilloscopes with specialized probing.
3 Phase Power Analysis
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High resolution hardware and advanced software algorithms work together to realize high-precision and high-efficiency tests, support synchronous sampling of three-phase voltage/current waveforms, integrate one-button measurement functions covering core functions including:
- power quality
- harmonic analysis
- ripple analysis
- efficiency analysis
- real-time display of a space vector diagram
All to help significantly accelerate the debugging of motor drive systems.
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Power Analysis Testing
SIGLENT High Resolution Oscilloscopes are all equipped with an optional power analysis kit that is used to analyze switch mode power supplies. Measurements include:
- Power Quality
- Current Harmonics based on IEC61000-3-2 A/B/C/D
- Inrush Current
- Switching Loss
- Slew Rate
- Modulation
- Output Ripple and Turn On/ Turn Off
- Transient Response Efficiency
- Frequency Response Measurements
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Dual Pulse Testing
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Characterize the dynamic response of high power IGBTs and MOSFETs with dual pulse testing. Customize pulse timing to improve switching efficiency and analyze characteristics like body diode conduction.
Dual Pulse Theory & Example
Dual Pulse App Note |
Power Integrity Measurements with Power Rail Probe
Ripple and noise are critical parameters for evaluating the quality of a power supply, as they reflect the instability and interference in the power supply’s output. Excessive ripple or noise can lead to inefficient operation, system instability, and accelerated equipment aging. Therefore, when designing power modules, it is crucial to accurately measure and assess ripple and noise levels.
For accurate ripple measurements, use a power rail probe like the SAP4000P.
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Optically Isolated probes for high CMRR Measurements
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Higher voltage and faster switching devices require bandwidth and voltage headroom. The combination of this requirement makes CMRR - Common Mode Rejection Ratio - a critical factor for high speed probes. Accurately make these measurements with optically isolated probes like the ODP6000B series.
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Power Measurements Guide
Download the complete power measurements guide to learn how to configure and analyze measurements with power supplies, oscilloscopes, and more. This includes sections on:
- Power Supply Configurations
- Series & parallel wiring
- Split supply wiring
- 4 Wire Compensation
- Double Pulse Test Theory & Example
- Double Pulse Test Automated Solution
- Power Analysis Measurements Application Note
- Three-Phase Power Measurement and Analysis
- Appendix: Power Analysis Probe Selection Guide
- Power Rail Integrity Measurements Application Note
- Optical isolated probes and high CMRR applications
- Power Supply Control Loop Response Measurements
- Power Supply Design: Load Step Response
- DC power supply efficiency measurements app note
- Programming Example: Python Power Supply Efficiency Example
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