Systems and methods for testing partial discharge during the leakage and/or surge tests for electric machines
AssigneeGM Global Technology Operations LLC
InventorsJohn S. Agapiou, Ronald M. Lesperance
Life of this patent
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Abstract
A testing system includes an AC signal generator configured to selectively generate a sinusoidal signal including a plurality of cycles. A dielectric strength and partial discharge tester sequentially performs dielectric strength and partial discharge testing of a stator of an electric machine using the sinusoidal signal. Another testing system includes an impulse signal generator configured to selectively generate an impulse signal including a plurality of cycles. A surge and partial discharge tester for sequentially performing surge and partial discharge testing of a stator of an electric machine using the impulse signal.
Claims18
A testing system, comprising:
- an AC signal generator configured to selectively generate a sinusoidal signal including a plurality of cycles;
- a dielectric strength and partial discharge tester for sequentially performing dielectric strength and partial discharge testing of a stator of an electric machine using the sinusoidal signal;
- a filter;
- a switching system configured to connect the AC signal generator to the stator of the electric machine and the filter during partial discharge testing;
- and
- a controller configured to receive an output of the filter during the partial discharge testing and to evaluate partial discharge of the electric machine.
A testing system, comprising:
- an AC signal generator configured to selectively generate a sinusoidal signal including a plurality of cycles;
- a dielectric strength and partial discharge tester for sequentially performing dielectric strength and partial discharge testing of a stator of an electric machine using the sinusoidal signal;
- a filter;
- an antenna having an output connected to the filter;
- a switching system configured to connect the AC signal generator to the stator of the electric machine during partial discharge testing;
- and
- a controller configured to receive an output of the filter during the partial discharge testing and to evaluate partial discharge of the electric machine.
A testing system, comprising:
- an impulse signal generator configured to selectively generate an impulse signal including a plurality of cycles;
- a surge and partial discharge tester for sequentially performing surge and partial discharge testing of a stator of an electric machine using the impulse signal;
- a filter comprising
- a plurality of capacitors connected in series between an input of the filter and an output of the filter,
- a plurality of Zener diodes connected between the output of the filter and a ground reference terminal,
- a first resistor connected between i) the plurality of capacitors and ii) the ground reference terminal, and
- a second resistor connected between i) one of the plurality of capacitors and one of the plurality of Zener diodes and ii) the output of the filter;
- a switching system configured to connect the impulse signal generator to the stator of the electric machine and the filter during partial discharge testing;
- and
- a controller configured to receive an output of the filter during the partial discharge testing and to evaluate partial discharge of the electric machine.
Dependencies are inferred from the claim text.