IMPULSE WINDING TESTER ST4030A fNEW| Transforming Motor Winding Testing (optional upgrade for the ST4030A) Quantification of response waveformsDISCHARGE DETECTION UPGRADE Test rotor assembly status

The new standard in winding testing Detect defects that were impossible to detect in the past Detect minuscule changes in response waveforms High-speed sampling × high resolution High-frequency components caused by discharges High resolution It’s difficult to detect the difference between defective and non-defective parts. Past issue Difficult to detect instantaneous variations Response waveform Instantaneous variations can be captured at a higher level of detail Differences between waveforms can be captured at a higher level of detail.

Detect single-turn faults Quantification of response waveforms Conventional approach Quantification of response waveforms Area comparison based on waveforms Area comparison for single-turn fault Non-defective winding Defective winding (master waveform) LC and RC value distribution in fault state (test waveform) Defective windings Non-defective winding Pass/fail judgments are difficult when area differences do not exceed several percentage points. The distributions of values differ for defective and non-defective windings. Pass/fail judgments are made by calculating the difference in area between...

Ample sampling data for proper detection Capture minuscule variations in response waveforms However, since the ST4030A supports a large number of sampling points, the instrument can capture waveforms of sufficient length to support detection, even when sampling at 200 MHz. Insufficient waveform length Appropriate waveform length for detection The ST4030A captures 8001 points of sampling data. Improved applied voltage reproducibility Detect defective parts with a high degree of repeatability The ST4030A can detect defective parts with a high degree of precision thanks to low variability in the...

DISCHARGE DETECTION UPGRADE ST9000 Detect pseudo-shorts with a high degree of precision By detecting minuscule partial discharges that are obscured by noise, the ST9000 makes it possible to detect insulation defects (pseudo-shorts) between motor windings. Proprietary Hioki filtering process Of the high-frequency components that appear in response waveforms, noise components that appear throughout the waveform are rejected so that the instrument can extract and make judgments based solely on partial discharge components. ▼ High-precision waveform detection 200 MHz, 12-bit sampling Partial discharge...

Testing after rotor assembly Once the rotor has been attached to the motor’s stator, the stray capacitance between the rotor and stator will vary depending on the position at which the rotor was attached. This variation in stray capacitance means that the response waveform obtained during impulse testing varies, preventing use of the conventional waveform comparison method. Although the LC and RC values used to quantify response waveforms also vary due to variations in those waveforms, the distributions of those values vary for defective and non-defective parts. Consequently, impulse testing...

When testing a motor whose response waveform exhibits reduced resonance due to rotor core loss, the ST4030A automatically adjusts the judgment interval so that evaluations can be made over an interval with high voltage amplitude. When a rotor is present, the ST4030A reduces the amount of electrical energy supplied to the motor, causing attenuation of the response waveform. Attenuation of response waveforms Reductions in electrical energy are primarily the result of the following types of loss: Core loss (1) Hysteresis loss Loss caused by changes in the orientation of the magnetic molecules in...

Create a PASS judgment area from the distribution of LC and RC values Full support to assist in setting testing conditions Automatic configuration of the PASS judgment area To make PASS and FAIL judgments, capture master LC and RC values from a known-good master workpiece. The ST4030A will automatically create a PASS judgment area based on those values. Choose the shape of the PASS judgment area. Captured LC and RC master values HI-LO Rectangular PASS judgment area Select when the master workpiece’s LC and RC values are distributed in close proximity FIT Trapezoidal PASS judgment area Select...

Functionality for recording and utilizing quantified test results Easily analyze test results on a computer Memory function and USB memory stick Measure workpiece Save results to internal memory Test count: n workpieces Copy saved data to USB memory stick Load data on PC Data stored in internal memory Test results: CSV file format The ST4030A can save the results of up to 1000 tests in its internal memory. You can then copy that data to a USB memory stick, open the measurement data using a spreadsheet application, and use it to analyze variability and manage testing data. Data that can be saved...

Ideal for embedding in winding inspection systems Main unit front Extensive range of interfacesInterfaces The ST4030A can be controlled from a computer using communications commands sent via its USB, LAN, GP-IB, or RS-232C interface.LAN Connector

EXT. I/O The EXT. I/O interface allows you to output signals such as the measurement complete signal (EOM) and the judgment results signal (PASS/FAIL) to an external device and to control the instrument based on input such as a START signal from an external device. Connectors Example of measurement timing Connectors to use (unit side) D- sub 37-pin Female connector with #4-40 inch screws Compliant connectors DC-37P-ULR (solder type) DCSP-JB37PR (pressure weld type) Japan Aviation Electronics Industry, Ltd Test times (reference values) EOM = (INDEX + software processing time + judgment times x...

(Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year) Applied voltage Testable inductance range Sampling speed Sampling resolution Voltage detection accuracy DC accuracy: ±5% of setting, AC band: 100 kHz, ±1 dB Accuracy guarantee conditions: 23°C ±5°C, 80% RH or less Judgment method 1001 to 8001 points (set in 1000 point steps) The same impulse voltage is applied to a master workpiece and the workpiece under test, and a PASS/FAIL judgment is made by comparing the shapes, LC and RC values, and discharge component magnitudes of the respective response waveforms. LC/RC...