Switching power supply, over-temperature control and protection method, and power control method

Patent metadata

Field	Value
Publication number	US-2018261997-A1
Application number	US-201815869644-A
Country	US
Kind code	A1
Filing date	Jan 12, 2018
Priority date	Mar 10, 2017
Publication date	Sep 13, 2018
Grant date	—

Abstract

The present disclosure relates to a switching power supply, an over-temperature control and protection method, and a power control method. The switching power supply includes: a converter module including at least one main power switch; a direction detection module configured to obtain installation direction information of the switching power supply; and a process module configured to perform a preset operation in accordance with the installation direction information of the switching power supply, The present disclosure may realize power control of the switching power supply and meet over-temperature protection requirements under various installation directions.

First claim

What is claimed is:

1 . A switching power supply, comprising:
a converter module comprising at least one main power switch; a direction detection module configured to obtain installation direction information of the switching power supply; and a process module configured to perform a preset operation in accordance with the installation direction information of the switching power supply.

2 . The switching power supply according to claim 1 , farther comprising:
a sampling module configured to sample the temperature of a detection point in the switching power supply; wherein the process module is electrically coupled with the sampling module and the direction detection module, and the process module comprises: an inquiry unit configured to obtain a temperature threshold value corresponding to the installation direction information of the switching power supply from a mapping relationship between installation direction information and temperature threshold values; a comparison unit configured to compare the temperature sampled by the sampling module with the temperature threshold value obtained by the inquiry unit; and a communication unit configured to determine whether to start an over-temperature protection based on a comparison result of the comparison unit and send a determination result signal to the converter module.

3 . The switching power supply according to claim 2 , wherein the converter module receives the determination result signal output from the process module and controls the main power switch of the switching power supply.

4 . The switching power supply according to claim 2 , wherein the sampling module comprises a digital temperature sensor.

5 . The switching power supply according to claim 4 , wherein the sampling module comprises:
a reference resistor having a first terminal coupled with a first voltage terminal; and thermistor having a first terminal coupled with a second terminal of the reference resistor and a second terminal coupled with a second voltage terminal.

6 . The switching power supply according to claim 1 , wherein the direction detection module comprises a gravity sensor.

7 . The switching power supply according to claim 1 , wherein the process module comprises:
a state determination unit configured to determine a motion state of the switching power supply based on acceleration information of the switching power supply detected by the direction detection module; and a storage unit configured to store at least one, of the acceleration information and the motion state.

8 . The switching power supply according to claim 7 , wherein the process module further comprises:
an alarm unit configured to output an alarm signal if the state determination unit determines that the switching power supply is in a falling-down state or vibration state.

9 . The switching power supply according to claim 7 , wherein the direction detection module comprises a gravity sensor and the determination of the motion state of the switching power supply comprises:
determining whether the acceleration information of the switching power supply sensed by the gravity sensor indicates a single-direction acceleration or indicates alternating positive and negative accelerations; determining that the switching power supply is in a falling-down state if it is determined that the acceleration information sensed by the gravity sensor indicates the single-direction acceleration; and determining that the switching power supply is in a vibration state if it is determined that the acceleration information sensed by the gravity sensor indicates alternating positive and negative accelerations.

10 . An over-temperature control and protection method, applied in a switching power supply, wherein the switching power supply comprises a direction detection module, a sampling module, and a process module, and the over-temperature control and protection method comprises:
sampling, by the sampling module, the temperature of a detection point in the switching power supply; obtaining, by the direction detection module, installation direction information of the switching power supply; obtaining a temperature threshold value corresponding to the installation direction information of the switching power supply from a mapping relationship between installation direction information and temperature threshold values; comparing the sampled temperature with the obtained temperature threshold value; and determining whether to start an over-temperature protection according to a comparison result.

11 . The over-temperature control and protection method according to claim 10 , further comprising:
sending the determination result to a converter module, and controlling, by the process module, an output power of the switching power supply.

12 . A power control method, applied in a switching power supply, wherein the switching power supply comprises a direction detection module and a processing module, and the power control method comprises:
detecting an installation direction of the switching power supply by the direction detection module; and controlling one or more of an output power, an output voltage, and an output current of the switching power supply by the process module in accordance with the detected installation direction.

13 . The power control method according to claim 12 , further comprising:
determining a motion state of the switching power supply based on acceleration information of the switching power supply detected by the direction detection module; storing at least one of the acceleration information and the motion state.

14 . The power control method according to claim 13 , wherein the determination of the motion state of the switching power supply comprises:
determining whether the acceleration information of the switching power supply detected by the direction detection module indicates a single-direction acceleration or indicates alternating positive and negative accelerations; determining that the switching power supply is in a falling-down state if it is determined that the acceleration information sensed by the direction detection module indicates the single-direction acceleration; and determining that the switching power supply is in, a vibration state if it is determined that the acceleration information sensed by the direction detection module indicates alternating positive and negative accelerations.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Jiao Dezhi
• Wang Baohua

Classifications

• H02H5/042 Primary

  using temperature dependent resistors · CPC title

• G01K3/005

  Circuits arrangements for indicating a predetermined temperature (fire detection G08B17/00) · CPC title

• G01P15/18

  in two or more dimensions · CPC title

• H02H1/0092

  concerning the data processing means, e.g. expert systems, neural networks · CPC title

• G01C9/02

  Details · CPC title