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US 2015/0318685 A1Published application
Systems And Methods For Inductive Overvoltage Protection Of PFC Buk Capacitors In Power Supplies
AssigneeDell Products L.P.
InventorsYa-Tang Hsieh, Tsung-Cheng Liao, Chang Yung Chang, Chi-Hua Lin, Wei Cheng Yu
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Abstract
Systems and methods are provided that may be implemented for overvoltage protection of bulk capacitors employed in power factor correction (PFC) circuitry components of switched mode power supply units (PSUs) using one or more inductive overvoltage feedback protection paths (OVPs) to monitor a voltage indicative of a PFC bulk capacitor by sensing the real time voltage at one or both of the primary and/or secondary side windings of a PSU transformer, and/or using an auxiliary windings of a PSU transformer.
Claims21
A switched mode power supply unit (PSU) system, comprising:
- transformer circuitry having a primary side winding and a secondary side winding;
- a primary side including at least one bulk capacitor configured to receive a power input and coupled to maintain an output voltage on the primary side winding;
- a secondary side including DC secondary side circuitry and the secondary side winding of the transformer, the DC secondary side circuitry being configured to receive power from the primary side through the transformer and to produce a DC power output therefrom;
- at least one PSU processing device coupled to control the primary side of the PSU to provide DC power to the primary side winding of the transformer;
- and
- at least one inductive overvoltage protection (OVP) feedback path coupled to the PSU processing device, the inductive OVP path being inductively coupled to the primary winding of the transformer to receive a voltage from the primary winding that is indicative of a real time voltage on the bulk capacitor.
3 more elements
A DC-powered information handling system, comprising:
- a DC-powered system load;
- and
- an AC-DC adapter system having AC primary side switcher circuitry configured to receive an AC power input, and a DC secondary side that receives power from the AC primary side switcher circuitry to produce a DC power output;
- where the DC-powered information handling system is configured to be coupled by a DC power connection to receive DC power from the DC power output of the AC-DC adapter system;
- and
- where the AC-DC adapter system comprises:
- transformer circuitry having a primary side winding and a secondary side winding,
- a primary side including the AC primary side switcher circuitry and the primary side winding of the transformer, the AC primary side switcher circuitry configured to receive the AC power input and including at least one bulk capacitor coupled to maintain an output voltage on the primary side winding,
- a secondary side including the DC secondary side circuitry and the secondary side winding of the transformer, the DC secondary side circuitry being configured to receive power from the AC primary side switcher circuitry through the transformer and to produce the DC power output therefrom,
- at least one PSU processing device coupled to control the primary side switcher circuitry to provide DC power to the primary side winding of the transformer, and
- at least one inductive overvoltage protection (OVP) feedback path coupled to the PSU processing device, the inductive OVP path being inductively coupled to the primary winding of the transformer to receive a voltage from the primary winding that is indicative of a real time voltage on the bulk capacitor.
8 more elements
A method of operating a switched-mode power supply unit (PSU) system including a primary side and a secondary side that are separated by a transformer, the method comprising:
- receiving a power input in the primary side of the PSU, the primary side of the PSU including a primary side winding of the transformer, and at least one bulk capacitor coupled to maintain an output voltage on the primary side winding;
- using the PSU processing device to control the primary side to provide DC power to the primary side winding of the transformer;
- receiving power in the secondary side of the PSU from the primary side of the PSU through the transformer, the secondary side of the PSU including a secondary side winding of the transformer and DC secondary side circuitry, the power being received in the secondary side of the PSU from the secondary winding of the transformer;
- producing a DC power output from the DC secondary side circuitry;
- and
- using at least one inductive overvoltage protection (OVP) feedback path to inductively receive a voltage from the primary winding of the transformer that is indicative of a real time voltage on the bulk capacitor and to provide a signal to the PSU processing device based at least in part on the value of the received voltage that is indicative of the real time voltage on the bulk capacitor.
3 more elements
Dependencies are inferred from the claim text.