Method and apparatus for detecting magnetron power supply failure
AssigneeFusion Systems Corporation
InventorsMichael G. Ury, William J. Jones
Life of this patent
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Abstract
A method and apparatus for detecting system failure in a magnetron power supply circuit. The apparatus is capable of providing an indication as to whether it is the power supply or the magnetron which has failed. A dual half wave doubler power supply circuit is provided and the currents corresponding to the respective dual portions are measured. The currents are compared to detect a failure of one of the dual power supply circuits while a sum of the currents may detect a failure of the magnetron.
Claims13
In power supply circuitry for powering a magnetron, a method of determining whether the power supply or the magnetron has failed, comprising the steps of,
- providing a magnetron which is powered by a dual half wave doubler circuit having dual first and second circuit portions including first and second transformers respectively,
- sensing the magnitude of a first current flowing in the primary of the first transformer,
- sensing the magnitude of a second current flowing in the primary of the second transformer, and
- comparing the magnitudes of the first and second currents to determine if the first current is more than a certain amount greater than the second current or if the second current is more than a certain amount greater than the first current, whereby it is determined whether the power supply has failed.
In power supply circuitry for powering a magnetron, an apparatus for determining whether the power supply or the magnetron has failed, comprising,
- a magnetron,
- a dual half wave doubler circuit for powering the magnetron, the dual half wave doubler circuit having dual first and second circuit portions including first and second transformers respectively,
- means for sensing the magnitude of a first current flowing in the primary of the first transformer,
- means for sensing the magnitude of a second current flowing in the primary of the second transformer, and
- means for comparing the magnitude of the first and second currents to determine if the first current is more than a certain amount greater than the second current or if the second current is more than a certain amount greater than the first current, whereby it is determined whether the power supply has failed.
Dependencies are inferred from the claim text.