Ideal diode bridge rectifying circuit and control method
First Claim
1. A rectifying circuit for converting an alternating current (AC) input voltage from a source to a direct current (DC) output voltage for delivery to a load, the rectifying circuit comprising:
- four ideal diode elements connected in a bridge configuration, the four ideal diode elements are metal-oxide-semiconductor field-effect transistors (MOSFETs);
four driver units, each one of the driver units connected to a corresponding one of the ideal diode elements and configured to drive the corresponding one of the ideal diode elements;
four resistors R1, R2, R3, R4, each one of the four resistors connected to a drain of a corresponding one of the MOSFETs; and
a controller comprising;
a processor connected to the driver units;
a phase detector connected to a voltage divider formed from resistors R1 and R2, and a voltage divider formed from resistors R3 and R4, and connected to the processor;
a resistor Rsense in a path between the load and the source; and
a current to voltage converter connected across the resistor Rsense and to the processor, and the controller configured for;
acquiring a current measurement flowing across the load and a phase measurement of the source;
determining, from the current measurement and the phase measurement, corresponding conducting settings for the four ideal diode elements; and
outputting at least one control signal to cause the driver units to drive the ideal diode elements in accordance with the corresponding conducting settings.
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Accused Products
Abstract
There is described a rectifying circuit and method of control thereof. The circuit comprises four ideal diode elements connected in a bridge configuration; four driver units, each one of the driver units connected to a corresponding one of the ideal diode elements and configured to drive the corresponding one of the ideal diode elements; and a controller connected to the driver units and configured for: acquiring a current measurement flowing across the load and a phase measurement of the source; determining, from the current measurement and the phase measurement, corresponding conducting settings for the four ideal diode elements; and outputting at least one control signal to cause the driver units to drive the ideal diode elements in accordance with the conducting settings.
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Citations
16 Claims
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1. A rectifying circuit for converting an alternating current (AC) input voltage from a source to a direct current (DC) output voltage for delivery to a load, the rectifying circuit comprising:
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four ideal diode elements connected in a bridge configuration, the four ideal diode elements are metal-oxide-semiconductor field-effect transistors (MOSFETs); four driver units, each one of the driver units connected to a corresponding one of the ideal diode elements and configured to drive the corresponding one of the ideal diode elements; four resistors R1, R2, R3, R4, each one of the four resistors connected to a drain of a corresponding one of the MOSFETs; and a controller comprising; a processor connected to the driver units; a phase detector connected to a voltage divider formed from resistors R1 and R2, and a voltage divider formed from resistors R3 and R4, and connected to the processor; a resistor Rsense in a path between the load and the source; and a current to voltage converter connected across the resistor Rsense and to the processor, and the controller configured for; acquiring a current measurement flowing across the load and a phase measurement of the source; determining, from the current measurement and the phase measurement, corresponding conducting settings for the four ideal diode elements; and outputting at least one control signal to cause the driver units to drive the ideal diode elements in accordance with the corresponding conducting settings. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for driving a rectifying circuit that converts an alternating current (AC) input voltage from a source to a direct current (DC) output voltage for delivery to a load, the method comprising:
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acquiring measurements for a current flowing across the load and a phase of the source comprising measuring a line voltage of the source and a neutral voltage of the source and determining a phase difference between the line voltage and the neutral voltage; determining, from the measurements, corresponding conducting settings for four ideal diode elements connected in a bridge configuration; and outputting at least one control signal to cause driver units connected to the four ideal diode elements to drive the ideal diode elements in accordance with the corresponding conducting settings. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification