Switch wear leveling
First Claim
1. An apparatus comprising:
- a switching module that controls switching for two pairs of switches configured in an H-bridge in a switching power converter, the switching module controlling each of the two pairs of switches closed and opened based on a duty cycle control technique, the switching module closing and opening each switch of the two pairs of switches in a switching sequence, wherein the two pairs of switches connect to a positive terminal and a negative terminal of a direct current (“
DC”
) voltage source, and wherein for a first switching sequence a first switch of a pair of switches of the two pairs of switches has a higher switching power loss than a second switch of the pair of switches;
a switch rotation module that changes the switching sequence of the two pairs of switches from the first switching sequence to a second switching sequence wherein the second switch of a pair of switches of the two pairs of switches has a higher switching power loss than the first switch of the pair of switches during the second switching sequence; and
a switch wear module that tracks switching sequences, wherein the switch rotation module changes the switching sequence based on tracking of the switching sequences.
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Accused Products
Abstract
An apparatus for switch wear leveling includes a switching module that controls switching for two or more pairs of switches in a switching power converter. The switching module controls switches based on a duty cycle control technique and closes and opens each switch in a switching sequence. The pairs of switches connect to a positive and negative terminal of a DC voltage source. For a first switching sequence a first switch of a pair of switches has a higher switching power loss than a second switch of the pair of switches. The apparatus includes a switch rotation module that changes the switching sequence of the two or more pairs of switches from the first switching sequence to a second switching sequence. The second switch of a pair of switches has a higher switching power loss than the first switch of the pair of switches during the second switching sequence.
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Citations
17 Claims
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1. An apparatus comprising:
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a switching module that controls switching for two pairs of switches configured in an H-bridge in a switching power converter, the switching module controlling each of the two pairs of switches closed and opened based on a duty cycle control technique, the switching module closing and opening each switch of the two pairs of switches in a switching sequence, wherein the two pairs of switches connect to a positive terminal and a negative terminal of a direct current (“
DC”
) voltage source, and wherein for a first switching sequence a first switch of a pair of switches of the two pairs of switches has a higher switching power loss than a second switch of the pair of switches;a switch rotation module that changes the switching sequence of the two pairs of switches from the first switching sequence to a second switching sequence wherein the second switch of a pair of switches of the two pairs of switches has a higher switching power loss than the first switch of the pair of switches during the second switching sequence; and a switch wear module that tracks switching sequences, wherein the switch rotation module changes the switching sequence based on tracking of the switching sequences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
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a switching power converter; a switching module that controls switching for two pairs of switches configured as an H-bridge in the switching power converter, the switching module controlling each of the two pairs of switches closed and opened based on a duty cycle control technique, the switching module closing and opening each switch of the two pairs of switches in a switching sequence, wherein the two pairs of switches connects to a positive terminal and a negative terminal of a direct current (“
DC”
) voltage source, and wherein for a first switching sequence a first switch of a pair of switches of the two pairs of switches has a higher switching power loss than a second switch of the pair of switches; anda switch rotation module that changes the switching sequence of the two pairs of switches from the first switching sequence to a second switching sequence wherein the second switch of a pair of switches of the two pairs of switches has a higher switching power loss than the first switch of the pair of switches during the second switching sequence; and a switch wear module that tracks switching sequences, wherein the switch rotation module changes the switching sequence based on tracking of the switching sequences. - View Dependent Claims (14)
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15. A method comprising:
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controlling switching for two pairs of switches configured in an H-bridge in a switching power converter by controlling each of the two pairs of switches closed and opened based on a duty cycle control technique, each switch of the two pairs of switches closing and opening in a switching sequence, wherein the two pairs of switches connect to a positive terminal and a negative terminal of a direct current (“
DC”
) voltage source, and wherein for a first switching sequence a first switch of a pair of switches has a higher switching power loss than a second switch of the pair of switches;changing the switching sequence of the two pairs of switches from the first switching sequence to a second switching sequence wherein the second switch of a pair of switches of the two pairs of switches has a higher switching power loss than the first switch of the pair of switches during the second switching sequence; and tracking the switching sequence, wherein changing the switching sequence is based on tracking of the switching sequence. - View Dependent Claims (16, 17)
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Specification