Impulse Winding Testing for General and Low-Inductance Coils
The ECG KOKUSAI DWX Series is an established impulse winding tester platform for nondestructive evaluation of coils and windings, with models covering test voltages up to 10 kV.
The tester applies the same capacitor-discharge impulse to a master coil and the coil under test, then compares the resulting voltage-decay waveforms. Differences in the response waveform can be used to evaluate winding characteristics, including turn and layer shorts, differences in the number of turns, and insulation-related abnormalities.
Up to 10 kV
DWX-01A / 05A / 10A model range
100 MHz
High-speed A/D sampling
8,192 bytes
Sampling memory
8.4-inch TFT
Color waveform display
A resistive voltage-divider input circuit and high-speed sampling allow detailed acquisition of short impulse-response waveforms. Evaluation methods include Area Size Comparison, Differential Area Comparison, Flutter Value, and Laplacian-based analysis.
The series includes the DWX-01A, DWX-05A, and DWX-10A, allowing the tester to be selected according to the required applied-voltage range and coil inductance.
For broader winding-test selection,
see the General Winding & Coil Test Solutions →
General and Low-Inductance Coil Testing
Designed for impulse testing of general coils as well as low-inductance coils used in advanced electronic components.
100 MHz High-Speed Sampling
High-speed A/D sampling at 100 MHz captures short impulse-response waveforms for detailed winding evaluation.
8,192-Byte Sampling Memory
High-density waveform acquisition supports detailed comparison of subtle differences between master and test waveforms.
Resistive Voltage-Divider Input
A 5 MΩ resistive voltage-divider input circuit supports acquisition of the impulse waveform with minimal waveform distortion.
Multiple Waveform Evaluation Methods
Supports Area Size Comparison, Differential Area Comparison, Flutter Value, and Laplacian-based evaluation.
Master-to-Test Waveform Comparison
Stored master and sample waveforms can be compared to identify differences in winding electrical characteristics.
8.4-Inch Color Display
The 8.4-inch TFT color LCD provides clear visualization of impulse-response waveforms and evaluation results.
External Control Interfaces
Parallel I/O and RS-232C support test control and data communication, with an Ethernet adapter available as a manufacturer-listed option.
Need dedicated partial-discharge testing? For applications where partial-discharge evaluation is the primary requirement, see the ECG KOKUSAI DWX-05PD .
General coil winding inspection
Low-inductance coil testing
Turn and layer short detection
Master-to-sample waveform comparison
Winding characteristic evaluation
Insulation-related abnormality evaluation
Coil turn-count difference evaluation
Coil and wound-component quality inspection
DWX Series Model Comparison
| Specification | DWX-01A | DWX-05A | DWX-10A |
|---|---|---|---|
| Applied Voltage | 50 V to 1,000 V | 500 V to 5,000 V | 1,000 V to 10,000 V |
| Voltage Step | 10 V | 100 V | 200 V |
| Maximum Energy | 5 mJ | 0.12 J | 0.5 J |
| Inductance Test Range | 10 µH or higher | 10 µH or higher | 50 µH or higher |
| Sampling | 8-bit / 10 ns / 100 MHz | ||
| Sampling Memory | 8,192-byte | ||
| Input Circuit | Resistive voltage divider, 5 MΩ | ||
| Display | 8.4-inch TFT color LCD / VGA 640 × 480 | ||
| Detection Method | Master waveform comparison using Area Size, Differential Area and discharge-related evaluation | ||
| Master Waveform Memory | Internal: 196 types; up to 700 types using Compact Flash Memory | ||
| External Interfaces | Parallel I/O, RS-232C, printer port; Ethernet adapter optional | ||
| Operating Temperature | 0°C to 40°C | ||
| Power Supply | AC 100 / 115 / 220 / 240 V ±5%, 50/60 Hz, 2 A | ||
| Dimensions | 345 × 185 × 370 mm | 345 × 185 × 370 mm | 345 × 325 × 370 mm |
Applied-voltage, voltage-step, and energy values are specified by the manufacturer at a 1 kΩ resistive load.
