High voltage non-destructive analysis of winding identifies difficult
to detect manufacturing faults
There are a number of parameters that can change during manufacture
that may affect the performance of a winding. These parameters, which
cannot always be measured with an LCR meter, include change in material
as well as shorted and damaged windings.
The 7720 Impulse Winding Tester uses a very high voltage impulse
to stimulate the device under test (DUT). It analyzes the decay
waveform to detect changes in material, shorted and damaged windings
and other errors. Long term decay of a winding can also be detected.
The system used ensures that the component is tested but not damaged
during the analysis process.
The shape of the waveform is dictated by the Q factor, inductance
and stray capacitance of the winding. High Q shows as a slow decay and
the frequency of the waveform is determined by the inductance and stray
capacitance of the DUT. Importantly, the short high voltage pulse causes
no damage to the device under test.
Simple operation, powerful detection capability and inexpensive
... a winning combination
The 7720 provides an important test capability in the production
process for any wound component manufacturer.
Early detection of component faults is a key feature of the 7720.
Faulty material, manufacturing process defects and bad components can
be identified early in the process. This saves money for the manufacturer
and it ensures the quality of the product supplied to the customer.
The 7720 has also been designed with ease of use in mind - using
a large visual display, graphical format and straightforward intuitive
operation. The 7720 provides all this capability at a very attractive
price.
Production test software
7720 is fully programmable through its RS232 port. Specialised
production test software is available as an option. Component
readouts can be stored against serial numbers to ensure thorough and
rigorous testing of components.
Clear and simple display with automatic PASS/FAIL
Technical specifications
Measurement Parameters
Area under curve
Differential area size
Flutter (corona) value
Waveform comparison.
Voltage Range
200 V to 5 kV (100 V Steps)
Test Voltage Accuracy
±2%
Measurement Time
50 ms
Memory
200 waveforms
Interfaces
RS232, parallel printer
Measurement Connections
2, 4, 6 or 8 self latching connectors
Display
320 x 240 dot with back lighting
Power requirements
115/230 V ±10%, 50/60 Hz
Operation temperature range
0°C to 40°C
Storage temperature range
-40°C to 70°C
Relative humidity
Up to 75%
Dimensions
W 425 mm, H 190 mm, D 350 mm
Weight
20 kg
Order codes and options
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7720 2 port Impulse Winding Tester
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1J7720/C2 |
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7720 4 port Impulse Winding Tester |
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1J7720/C4 |
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7720 6 port Impulse Winding Tester |
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1J7720/C6 |
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7720 8 port Impulse Winding Tester |
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1J7720/C8 |
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All units supplied with user manual, 2 m AC power cable and test connectors. |
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Accessories
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Production Test Software |
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PT7720 |
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