Rotation Direction and Magnetic Field Inspection for Stator Coils
The ECG KOKUSAI RDT-308 is a rotation direction tester for evaluating CW/CCW direction, magnetic field distribution, winding abnormalities, and connection conditions in stator coils.
The tester applies three-phase or single-phase excitation current to the stator coil and uses a detector positioned inside the stator to measure the magnetic flux generated by the winding.
CW / CCW
Rotation direction evaluation
2 Test Modes
Rotation direction and magnetic field distribution
Up to 16 Poles
Multi-pole stator coil support
Auto Sensitivity
Automatic adjustment for optimum detection
Test Mode 1 combines multiple detected magnetic-flux waveforms into phase A and phase B signals and determines overall rotation direction and field intensity from their phase difference and amplitude.
Test Mode 2 evaluates the individual magnetic-flux distribution detected by multiple sensor coils. This allows localized disturbances to be detected even when the overall rotation direction appears normal, helping identify winding and connection abnormalities.
For integrated winding inspection,
see the ECG KOKUSAI WTS-05 →
CW / CCW Rotation Direction Testing
Determines the overall direction of rotation from the phase difference and amplitude of detected magnetic-flux waveforms.
Magnetic Field Distribution Testing
Evaluates phase difference and magnetic field strength across multiple detector coils to identify localized magnetic-flux abnormalities.
Up to 16-Pole Stator Coil Support
Supports stator coils with up to 16 poles, including 2-, 4-, 6-, 8-, 12-, and 16-pole configurations when the appropriate detector is used.
Automatic Pole Detection
Automatic pole-number detection supports efficient setup when testing compatible stator coil configurations.
Automatic Sensitivity Adjustment
Automatically adjusts detection sensitivity to support stable magnetic-flux measurement for the connected stator coil.
5 kHz Excitation
Provides three-phase or two-phase sine-wave excitation at 5 kHz with a phase setting range of 5 Vp-p.
Overcurrent Protection
Built-in overcurrent protection helps protect the tester during stator coil excitation.
External Communication
SIGNAL I/O and RS-232C support settings, result-data transmission, and integration with external automation equipment.
Detector selection is application-specific. RDT-308 detectors are selected according to the stator coil pole count and physical dimensions.
Stator coil rotation direction verification
CW / CCW winding inspection
Wrong winding detection
Poor connection detection
Magnetic field distribution inspection
Phase-difference evaluation
Multi-pole stator coil inspection
Production winding quality control
RDT-308 Specifications
| Test Mode 1 | Rotation direction test (CW / CCW) |
|---|---|
| Test Mode 2 | Magnetic field distribution test using phase difference and magnetic field strength |
| Excitation Phase Type | Three-phase / single-phase |
| Output Waveform | Three-phase / two-phase sine-wave output |
| Excitation Frequency | 5 kHz |
| Excitation Voltage Setting | Phase 5 Vp-p, 100 steps |
| Maximum Applied Current | 500 mA |
| Detection Sensitivity | 10 steps plus automatic setting-range mode |
| Supported Pole Configurations | 2 / 4 / 6 / 8 / 12 / 16 poles depending on selected detector |
| Protection | Overcurrent protection |
| Communication | SIGNAL I/O / RS-232C |
| Power Supply | AC 100 to 240 V ±5%, 50/60 Hz |
| Power Consumption | 40 VA or less |
| Operating Environment | 5°C to 40°C / 20% to 80% RH |
| Dimensions | 192 (W) × 95 (H) × 235 (D) mm |
| Weight | Approx. 1.8 kg |
| Detector | Selected separately according to test-object pole count and dimensions |
