Inspection system for evaluating electrical parts for unwanted partial discharge
First Claim
1. An electrical part testing system, for evaluating quality of an insulated electrical part, comprising:
- a computer-controlled switching apparatus configured and arranged to;
receive, from a computing device, a pre-determined testing scheme corresponding to the electrical part;
receive, from a voltage source, an original voltage having a pre-determined voltage level; and
provide the original voltage to the electrical part automatically according to the pre-established testing scheme;
a high-frequency filter configured and arranged to;
receive the original voltage;
receive a load voltage emanating from the electrical part in response to the part receiving the original voltage; and
filter the original voltage from the load voltage to isolate any partial-discharge inception voltage added to the original voltage by the electrical part while the part is being electrified by the original voltage, yielding a filtered signal; and
the computing device being configured and arranged to;
receive, from the high-frequency filter, the filtered signal;
compare a peak amplitude of the filtered signal to a voltage threshold, in a comparison; and
determine, based on the comparison, the quality of the electrical part being tested.
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Accused Products
Abstract
An electrical part testing system for evaluating quality of an insulated electrical part, including a computer-controlled switching apparatus for providing an original voltage to the electrical part automatically according to a pre-established testing scheme calling for provision of voltage to each phase of the part, in turn, while grounding the other phases of the part. A high-frequency filter for receiving receive the original voltage, receiving a load voltage emanating from the electrical part in response to the part receiving the original voltage, and filtering the original voltage from the load voltage to isolate any partial-discharge voltage added to the original voltage by the electrical part while the part is being electrified by the original voltage, yielding a filtered signal. A computing device determines, based on a comparison of a peak amplitude of the partial-discharge inception voltage to a voltage threshold, the quality of the electrical part being tested.
4 Citations
17 Claims
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1. An electrical part testing system, for evaluating quality of an insulated electrical part, comprising:
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a computer-controlled switching apparatus configured and arranged to; receive, from a computing device, a pre-determined testing scheme corresponding to the electrical part; receive, from a voltage source, an original voltage having a pre-determined voltage level; and provide the original voltage to the electrical part automatically according to the pre-established testing scheme; a high-frequency filter configured and arranged to; receive the original voltage; receive a load voltage emanating from the electrical part in response to the part receiving the original voltage; and filter the original voltage from the load voltage to isolate any partial-discharge inception voltage added to the original voltage by the electrical part while the part is being electrified by the original voltage, yielding a filtered signal; and the computing device being configured and arranged to; receive, from the high-frequency filter, the filtered signal; compare a peak amplitude of the filtered signal to a voltage threshold, in a comparison; and determine, based on the comparison, the quality of the electrical part being tested. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, for evaluating quality of an insulated electrical part, comprising:
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receiving, by the switching apparatus, from a computing device, an instruction signal indicating a pre-determined testing scheme corresponding to the part, the original voltage to the electrical part being tested; receiving, by a switching apparatus, an original voltage to be provided to the electrical part being tested; providing, by the switching apparatus, in accord with the pre-determined testing scheme; receiving, by the computing device, from high-frequency filter partial-discharge-inception-voltage signal indicating a peak amplitude; and determining, by the computing device, whether the part is good by comparing the peak amplitude to a threshold; wherein the partial-discharge-inception-voltage signal is a filtered signal prepared by; receiving, by the high-frequency filter, from the voltage source, being an impulse surge instrument, the original voltage; receiving, by the high-frequency filter, a load voltage emanating from the electrical part in response to the part receiving the original voltage from the switching apparatus; and filtering, by the high-frequency filter, the original voltage from the load voltage to isolate any partial-discharge inception voltage added to the original voltage by the electrical part while the part is being electrified by the original voltage, yielding the filtered signal. - View Dependent Claims (12, 13, 14, 15)
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16. A non-transitory computer-readable storage device comprising a computer-readable medium having computer-executable instructions that, when executed by a processor, cause the processor to perform operations, for evaluating quality of an insulated electrical part, comprising:
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providing, to an automated switching apparatus, an instruction signal including a testing scheme, wherein the scheme; corresponds to multiple phases of the electrical part being evaluated; and instructs the switching apparatus on a manner by which to provide an original voltage selectively to the part, including to provide the original voltage to a first phase, of the multiple phases of the part, while grounding other phases, of the multiple phases of the part, and to repeat for each phase; receiving, from a high-speed digitizer, a filtered-and-processed signal indicating a peak amplitude of a partial-discharge inception voltage emanating from the part while the part is being electrified by the original voltage; and determining whether the part is good by comparing, to a threshold, the peak amplitude received in connection with each phase of the part. - View Dependent Claims (17)
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Specification