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US 8,659,276 B2Granted
Interleaved power converter and controller therefor
AssigneeTDK-Lambda UK Limited
InventorAndrew John Skinner
Life of this patent
Estimating the term…
Abstract
Disclosed is an interleaved power converter for converting a DC voltage source into a DC voltage output.
Claims19
An interleaved power converter for converting a DC voltage source into a DC voltage output, the converter comprising:—
- two or more sub-circuits connected in parallel, each sub-circuit comprising an inductive element, a rectifying element and a controllable switching device connected for converting a DC voltage source into a DC voltage output;
- driving means for driving the switching device of each sub-circuit to repeatedly switch on at a time t1 and off at a time t2, with a phase difference between the switch-on times t1 of each switching device;
- current sensing means for repeatedly determining an input current value associated with each sub-circuit, by sensing the input current of the converter at a sample point a pre-determined time relative to the switch-on time t1 or the switch-off time t2 of said switching device;
- and
- control means comprising:—
- comparator means for comparing the input current value determined at each sample point with the input current value determined at the preceding sample point, to obtain a measure of current imbalance attributable to one or both of the sub-circuits with which the compared input current values are associated;
- and
- current balancing means for adjusting the time interval Ton from t1 to t2, for one or both of the sub-circuits with which the compared input current values are associated, to compensate for said current imbalance.
5 more elements
A controller for an interleaved power converter,
- wherein an interleaved power converter comprises two or more sub-circuits connected in parallel, each sub-circuit comprising an inductive element, a rectifying element and a controllable switching device connected for converting a DC voltage source into a DC voltage output, and driving means for driving the switching device of each sub-circuit in the converter to repeatedly switch on at a time t1 and off at a time t2, with a phase difference between the switch-on times t1 of each switching device;
- the controller comprising:—
- receiving means for repeatedly receiving a signal which represents an input current value associated with each sub-circuit at a sample point a pre-determined time relative to the switch-on time t1 or the switch-off time t2 of said switching device;
- comparator means for comparing the input current value determined at each sample point with the input current value determined at the preceding sample point, to obtain a measure of current imbalance attributable to one or both of the sub-circuits with which the compared input current values are associated;
- and
- current balancing means for determining the time interval Ton from t1 to t2, for one or both of the sub-circuits with which the compared input current values are associated, to compensate for said current imbalance.
3 more elements
A multi-phase interleaved power converter for converting a DC voltage source into a DC voltage output, the converter comprising:—
- two or more sub-circuits connected in parallel, each sub-circuit comprising an inductive element, a rectifying element and a controllable switching device connected for converting a DC voltage source into a DC voltage output;
- driving means for driving the switching device of each sub-circuit to repeatedly switch on at a time t1 and off at a time t2, with a phase difference between the switch-on times t1 of each switching device, such that each sub-circuit is associated with a different phase of the converter;
- and
- current sensing means for repeatedly determining an input current value associated with each phase, by sensing the input current of the converter at a sample point a pre-determined time relative to the switch-on time t1 or the switch-off time t2 of the switching device;
- and
- control means comprising:—
- comparator means for comparing the input current value determined for each phase with the input current value determined for the preceding phase, to obtain a measure of current imbalance between said phases;
- and
- current balancing means for adjusting the time interval Ton from t1 to t2, for one or both of the sub-circuits with which the compared input current values are associated, to compensate for said current imbalance.
6 more elements
A controller for a multi-phase interleaved power converter,
- wherein a multi-phase interleaved power converter comprises two or more sub-circuits connected in parallel, each sub-circuit comprising an inductive element, a rectifying element and a controllable switching device connected for converting a DC voltage source into a DC voltage output, and driving means for driving the switching device of each sub-circuit to repeatedly switch on at a time t1 and off at a time t2, with a phase difference between the switch-on times t1 of each switching device, such that each sub-circuit is associated with a different phase of the converter;
- the controller comprising:—
- receiving means for repeatedly receiving a signal which represents an input current value associated with each phase at a sample point a pre-determined time relative to the switch-on time t1 or the switch-off time t2 of said switching device;
- comparator means for comparing the input current value determined for each phase with the input current value determined for the preceding phase, to obtain a measure of current imbalance between said phases;
- and
- current balancing means for determining the time interval Ton from t1 to t2, for one or both of the sub-circuits with which the compared input current values are associated, to compensate for said current imbalance.
3 more elements
Dependencies are inferred from the claim text.