CONTROL DEVICE AND METHOD FOR REGULATING A MULTIPHASE DC-DC CONVERTER
First Claim
1. A control device for controlling a polyphase DC-to-DC voltage converter (10) which has a first converter branch (11) and a second converter branch (12) connected in parallel with the first converter branch (11), the control device comprising:
- a switching signal generator (3) configured tocalculate measured values for current in the converter branches (11;
12),compare, for the first converter branch (11), the calculated measured value (M1) of the current (I1) in the first converter branch (11) to a first upper current threshold value (Lo1) and a first lower current threshold value (Lu1) and to generate, on the basis of the comparison, a first actuation signal (S1) for switching devices (41;
42) of the first converter branch (11), andcompare, for the second converter branch (12), the calculated measured value (M2) of the current (I2) in the second converter branch (12) to a second upper current threshold value (Lo2) and a second lower current threshold value (Lu2) and to generate, on the basis of the comparison, a second actuation signal (S2) for switching devices (41;
42) of the second converter branch (12); and
a threshold-value generator (2) coupled to the switching signal generator (3) and configured togenerate upper and lower current threshold values (Lo1, Lu1;
Lo2, Lu2) for the switching signal generator (3),calculate a present phase shift (dT) of the actuation signals (S1;
S2) for the switching devices (41;
42) in the first and second converter branches (11;
12), andtemporarily change the second upper current threshold value (Lo2) and/or the second lower current threshold value (Lu2) on the basis of the calculated phase shift (dT).
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Abstract
The invention relates to a control device for regulating a multiphase dc-dc converter having at least one first converter branch and one second converter branch connected in parallel to the first converter branch. The control device comprises a switching signal generation device that is designed to determine measurement values for the current in the converter branches, to compare, for a first of the converter branches, the determined measurement value of the current in the first converter branch to a first upper threshold current value and a first lower threshold current value and, on the basis of the comparisons, to generate a first control signal for switching devices of the first converter branch, and for a second of the converter branches, to compare the determined measurement value of the current in the second converter branch to a second upper threshold current value and a second lower threshold current value and, on the basis of the comparisons, to generate a second control signal for switching devices of the second converter branch. The control device further comprises a threshold value generator, which is coupled to the switching signal generation device and is designed to generate upper and lower threshold current values for the switching signal generation device, to determine an actual current phase offset of the control signals for the switching devices in the first and second converter branches, and on the basis of the determined phase offset, to temporarily modify the second upper current threshold value and/or the second lower current threshold value.
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Citations
10 Claims
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1. A control device for controlling a polyphase DC-to-DC voltage converter (10) which has a first converter branch (11) and a second converter branch (12) connected in parallel with the first converter branch (11), the control device comprising:
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a switching signal generator (3) configured to calculate measured values for current in the converter branches (11;
12),compare, for the first converter branch (11), the calculated measured value (M1) of the current (I1) in the first converter branch (11) to a first upper current threshold value (Lo1) and a first lower current threshold value (Lu1) and to generate, on the basis of the comparison, a first actuation signal (S1) for switching devices (41;
42) of the first converter branch (11), andcompare, for the second converter branch (12), the calculated measured value (M2) of the current (I2) in the second converter branch (12) to a second upper current threshold value (Lo2) and a second lower current threshold value (Lu2) and to generate, on the basis of the comparison, a second actuation signal (S2) for switching devices (41;
42) of the second converter branch (12); anda threshold-value generator (2) coupled to the switching signal generator (3) and configured to generate upper and lower current threshold values (Lo1, Lu1;
Lo2, Lu2) for the switching signal generator (3),calculate a present phase shift (dT) of the actuation signals (S1;
S2) for the switching devices (41;
42) in the first and second converter branches (11;
12), andtemporarily change the second upper current threshold value (Lo2) and/or the second lower current threshold value (Lu2) on the basis of the calculated phase shift (dT). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method (50) for controlling a polyphase DC-to-DC voltage converter (10) which has at least one first converter branch (11) and a second converter branch (12) connected in parallel with the first converter branch (11), wherein the method (50) has the following steps:
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calculating (51) measured values for current in the converter branches; generating (52) upper and lower current threshold values; comparing (53) the calculated measured value of the current in the first converter branch to a first upper current threshold value and a first lower current threshold value; generating (54), on the basis of the comparison, a first actuation signal for switching devices of the first converter branch; comparing (55) the calculated measured value of the current in the second converter branch to a second upper current threshold value and a second lower current threshold value; generating (56), on the basis of the comparison, a second actuation signal for switching devices of the second converter branch; calculating (57) a present phase shift of the actuation signals for the switching devices in the first and second converter branches; and temporarily changing (58) the second upper current threshold value and/or the second lower current threshold value on the basis of the calculated phase shift. - View Dependent Claims (10)
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Specification