US-12620892-B2 - Power supply, electronic device, and method for controlling same

US12620892B2US 12620892 B2US12620892 B2US 12620892B2US-12620892-B2

Abstract

An electronic device in accordance with one embodiment may include a load that receives power and performs an operation; and a power supply that supplies power to the load, the power supply including: a rectifier configured to rectify an input alternating current (AC) voltage; a converter including at least one first switching element and configured to convert the rectified input AC voltage into a direct current (DC) voltage; an inverter including a plurality of second switching elements and configured to convert the DC voltage into an AC voltage; a plurality of temperature sensors configured to detect the temperature of each of a plurality of switching elements including the at least one first switching element and the plurality of second switching elements; and a processor configured to determine whether a temperature failure occurs in the plurality of switching elements based on a temperature difference between the plurality of switching elements or a temperature variation amount of each of the plurality of switching elements and performs temperature protection control on the plurality of switching elements based on determining that the temperature failure occurs.

Inventors

Jonghyun Shin
Youngjae PARK
Junghoon Lee
Teaho LEE

Assignees

SAMSUNG ELECTRONICS CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20230512
Priority Date: 20210218

Claims (18)

1 . An electronic device comprising: a load that receives power and performs an operation; and a power supply that supplies power to the load, the power supply including: a rectifier configured to rectify an input alternating current (AC) voltage; a converter including at least one first switching element and configured to convert the rectified input AC voltage into a direct current (DC) voltage; an inverter including a plurality of second switching elements and configured to convert the DC voltage into an AC voltage; a plurality of temperature sensors configured to detect a temperature of each switching element of the at least one first switching element and the plurality of second switching elements; and a processor configured to determine whether a temperature failure occurs in at least one switching element of the at least one first switching element and the plurality of second switching elements based on a temperature difference between a switching element of the at least one first switching element and a switching element of the plurality of second switching elements, and perform temperature protection control on the at least one switching element based on determining that the temperature failure occurs.
2 . The electronic device of claim 1 , wherein the processor is configured to determine that the temperature failure occurs based on the temperature difference between the switching element of the at least one first switching element and the switching element of the plurality of second switching elements exceeding a predetermined temperature difference for a predetermined time.
3 . The electronic device of claim 2 , wherein the processor is configured to adjust the predetermined temperature difference in an increasing direction in response to the input AC voltage being increased.
4 . The electronic device of claim 1 , wherein the processor is configured to determine that the temperature failure occurs based on a variation amount of the temperature difference between the switching element of the at least one first switching element and the switching element of the plurality of second switching elements exceeding a predetermined value and being maintained for a predetermined time.
5 . The electronic device of claim 1 , wherein the processor is configured to perform the temperature protection control by lowering a supplied current to the at least one switching element based on determining that the temperature failure occurs.
6 . The electronic device of claim 1 , further comprising: a cooling device configured to lower a temperature of each switching element of the at least one first switching element and the plurality of second switching elements, wherein the processor is configured to perform the temperature protection control by increasing cooling performance of the cooling device based on determining that the temperature failure occurs.
7 . The electronic device of claim 6 , wherein the cooling device is a refrigerant cooling type cooling device, and the processor is configured to increase the cooling performance of the cooling device by increasing a refrigerant flow rate of the cooling device.
8 . The electronic device of claim 6 , wherein the cooling device is an air cooling type cooling device, and the processor is configured to increase the cooling performance of the cooling device by increasing an air volume of the cooling device.
9 . The electronic device of claim 1 , further comprising: a current sensor configured to detect an input current of the input AC voltage, wherein the processor is configured to determine whether the temperature failure occurs based on a variation amount of the input current being less than a predetermined value.
10 . A method of controlling an electronic device including a load that receives power and performs an operation, and a power supply that supplies power to the load, a rectifier, a converter including at least one first switching element, and an inverter including a plurality of second switching elements, the method comprising: controlling the converter to convert an input alternating current (AC) voltage rectified by the rectifier into a direct current (DC) voltage following a predetermined voltage; controlling the inverter to convert the DC voltage into a three-phase voltage; detecting a temperature of each switching element of the at least one first switching element and the plurality of second switching elements; determining whether a temperature failure occurs in at least one switching element of the at least one first switching element and the plurality of second switching elements based on a temperature difference between a switching element of the at least one first switching element and a switching element of the plurality of second switching elements; and performing temperature protection control on at least one switching element based on determining that the temperature failure occurs.
11 . The method of claim 10 , wherein the determining of whether the temperature failure occurs includes determining that the temperature failure occurs based on the temperature difference between the switching element of the at least one first switching element and the switching element of the plurality of second switching elements exceeding a predetermined temperature difference for a predetermined time.
12 . The method of claim 11 , further comprising: adjusting the predetermined temperature difference in an increasing direction in response to the input AC voltage being increased.
13 . The method of claim 10 , wherein the determining of whether the temperature failure occurs includes determining that the temperature failure occurs based on a variation amount of the temperature difference between the switching element of the at least one first switching element and the switching element of the plurality of second switching elements exceeding a predetermined value and being maintained for a predetermined time.
14 . The method of claim 10 , wherein the performing of the temperature protection control includes performing the temperature protection control by lowering a supplied current to the at least one switching element based on determining that the temperature failure occurs.
15 . The method of claim 10 , wherein the power supply further includes a cooling device configured to lower a temperature of each switching element of the at least one first switching element and the plurality of second switching elements, and the performing of the temperature protection control includes performing the temperature protection control by increasing cooling performance of the cooling device based on determining that the temperature failure occurs.
16 . The method of claim 15 , wherein the cooling device is a refrigerant cooling type cooling device, and the performing of the temperature protection control includes increasing the cooling performance of the cooling device by increasing a refrigerant flow rate of the cooling device.
17 . The method of claim 10 wherein the power supply further includes a current sensor configured to detect an input current of the input AC voltage, and the determining of whether the temperature failure occurs includes determining whether the temperature failure occurs based on a variation amount of the input current being less than a predetermined value.
18 . An electronic device comprising: a load that receives power and performs an operation; and a power supply that supplies power to the load, the power supply including: a rectifier configured to rectify an input alternating current (AC) voltage; a converter including at least one first switching element and configured to convert the rectified input AC voltage into a direct current (DC) voltage; an inverter including a plurality of second switching elements and configured to convert the DC voltage into an AC voltage; a current sensor configured to detect an input current of the input AC voltage; a plurality of temperature sensors configured to detect a temperature of each switching element of the at least one first switching element and the plurality of second switching elements; and a processor configured to determine whether a temperature failure occurs in at least one switching element of the at least one first switching element and the plurality of second switching elements based on a temperature difference between a switching element of the at least one first switching element and a switching element of the plurality of second switching elements and a variation amount of the input current, and perform temperature protection control on the at least one switching element based on determining that the temperature failure occurs.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is a continuation of International Application PCT/KR2021/019183, filed on Dec. 16, 2021, and claims foreign priority to Korean Patent Application No. 10-2021-0022075, filed on Feb. 18, 2021, the disclosures of which are incorporated by reference herein in their entireties. BACKGROUND 1. Field Embodiments of the present disclosure relate to a power supply for supplying power and an electronic device including the same. 2. Description of Related Art In general, a power supply may include a plurality of switching elements. The plurality of switching elements may be located in a converter to convert an AC voltage into a DC voltage, and may be located in an inverter to convert the DC voltage into a three-phase voltage. Heat may be generated in the power supply due to the operation of the plurality of switching elements, and a heat sink, such as a heat sink plate, can be used to cool the power supply. For this, the plurality of switching elements may be provided in a structure fastened to the heat sink. However, when the fastening state of the switching element to the heat sink is incomplete or the fastening force is reduced due to vibrations and the like, local thermal runaway may occur in the switching element, which may lead to system failure due to device destruction. SUMMARY An electronic device in accordance with one embodiment may include a load that receives power and performs an operation; and a power supply that supplies power to the load, the power supply including: a rectifier configured to rectify an input alternating current (AC) voltage; a converter including at least one first switching element and configured to convert the rectified input AC voltage into a direct current (DC) voltage; an inverter including a plurality of second switching elements and configured to convert the DC voltage into an AC voltage; a plurality of temperature sensors configured to detect the temperature of each of a plurality of switching elements including the at least one first switching element and the plurality of second switching elements; and a processor configured to determine whether a temperature failure occurs in the plurality of switching elements based on a temperature difference between the plurality of switching elements or a temperature variation amount of each of the plurality of switching elements and performs temperature protection control on the plurality of switching elements based on determining that the temperature failure occurs. The processor may determine that the temperature failure occurs based on the temperature variation amount in any one of the plurality of switching elements being maintained at a predetermined value or more for a predetermined time. The processor may determine that the temperature failure occurs based on the temperature difference between any one of the plurality of switching elements and another one of the plurality of switching elements exceeding a predetermined temperature difference for a predetermined time. The processor may adjust the predetermined temperature difference in an increasing direction in response to the input AC voltage being increased. The processor may determine that the temperature failure occurs based on a variation amount of the temperature difference between any one of the plurality of switching elements and another one of the plurality of switching elements exceeding a predetermined value and being maintained for a predetermined time. The processor may perform the temperature protection control by lowering a supplied current to the plurality of switching elements based on determining that the temperature failure occurs. The power supply may further include a cooling device that lowers temperature of the plurality of switching elements, and the processor may perform the temperature protection control by increasing cooling performance of the cooling device based on determining that the temperature failure occurs. The cooling device may be a refrigerant cooling-type cooling device, and the processor may increase the cooling performance of the cooling device by increasing a refrigerant flow rate of the cooling device. The cooling device may be an air cooling-type cooling device, and the processor may increase the cooling performance of the cooling device by increasing the air volume of the cooling device. The power supply may further include a current sensor that detects an input current of the input AC voltage, and the processor may determine whether the temperature failure occurs in the plurality of switching elements based on a variation amount of the input current being less than a predetermined value. A method of controlling an electronic device including a load that receives power and performs an operation, and a power supply that supplies power to the load, the rectifier, a converter having at least one first switching element, and an inverter having a plurality of second switching elemen