Control method, device, system and storage medium

Patent metadata

Field	Value
Publication number	US-12525786-B2
Application number	US-202218289529-A
Country	US
Kind code	B2
Filing date	May 7, 2022
Priority date	May 12, 2021
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A control method includes, in response to detecting a target-type fault, determining, by a first control device managing a three-phase three-level power supply circuit, a control signal for instructing a first load to stop operating. The first load is connected to one of buses of the three-phase three-level power supply circuit, and the target-type fault is correlated with a second load connected to two of the buses of the three-phase three-level power supply circuit. The method further includes sending the control signal to a second control device via a target communication channel, to instruct the second control device to control the first load to stop operating.

First claim

What is claimed is:

1 . A control method comprising:
in response to detecting a target-type fault, determining, by a first control device managing a three-phase three-level power supply circuit, a control signal for instructing a first load to stop operating, the first load being connected to one of buses of the three-phase three-level power supply circuit, and the target-type fault being correlated with a second load connected to two of the buses of the three-phase three-level power supply circuit; and sending the control signal to a second control device via a target communication channel, to instruct the second control device to control the first load to stop operating.

2 . The method according to claim 1 , wherein:
the target-type fault includes at least one of a shutdown fault of the second load or an over-voltage fault of a first capacitor; and the first capacitor is an energy storage capacitor in the three-phase three-level power supply circuit other than a second capacitor connected in parallel with the first load.

3 . The method according to claim 1 , wherein:
the control signal is a first control signal; the three-phase three-level power supply circuit includes:
a first capacitor; and
a second capacitor connected in parallel with the first load;
a transmission channel for transmitting a second control signal and the target communication channel exist between the first control device and the second control device, the second control signal including an operating parameter of the first control device for controlling the first load; and sending the first control signal to the second control device via the target communication channel includes:
in response to that the first control signal is in a form of data frame, sending the first control signal to the second control device via the target communication channel according to a preset time interval, the preset time interval being shorter than a time period required for a minimum operating voltage required by the first load to be, when the first load is at maximum, reduced to a minimum voltage permitted by the second capacitor.

4 . The method according to claim 1 , wherein:
the control signal is a first control signal including a high and low level signal or a voltage signal; and a transmission channel for transmitting a second control signal and the target communication channel exist between the first control device and the second control device, the second control signal including an operating parameter of the first control device for controlling the first load.

5 . The method according to claim 1 , wherein:
determining the control signal for instructing the first load to stop operating includes:
generating the control signal in a form of data frame based on an operating parameter of the first control device for controlling the first load and target identification information, the target identification information being configured to instruct the second control device to control the second load to stop operating;
the target communication channel is further configured to transmit the operating parameter of the first control device for controlling the first load; and sending the control signal to the second control device via the target communication channel includes:
sending the control signal to the second control device via the target communication channel using a preset time period as a communication interval.

6 . The method according to claim 5 , wherein:
the three-phase three-level power supply circuit includes:
a first capacitor; and
a second capacitor connected in parallel with the first load; and
the preset time period is shorter than a time period required for a minimum operating voltage required by the first load to be, when the first load is at maximum, reduced to a minimum voltage permitted by the second capacitor.

7 . The method according to claim 1 , wherein:
the control signal is a first control signal; determining the first control signal for instructing the first load to stop operating includes:
generating the first control signal in a form of data frame based on target identification information, the target identification information being configured to instruct the second control device to control the second load to stop operating;
the target communication channel is further configured to transmit an operating parameter of the first control device for controlling the first load; and sending the first control signal to the second control device via the target communication channel includes:
suspending sending a second control signal via the target communication channel based on priorities of the first control signal and the second control signal, a sending priority of the first control signal being higher than a sending priority of the second control signal; and
sending the first control signal to the second control device via the target communication channel using a preset time period as a communication interval.

8 . The method according to claim 7 , wherein:
the three-phase three-level power supply circuit includes:
a first capacitor; and
a second capacitor connected in parallel with the first load; and
the preset time period is shorter than a time period required for a minimum operating voltage required by the first load to be, when the first load is at maximum, reduced to a minimum voltage permitted by the second capacitor.

9 . The method according to claim 1 , wherein the target communication channel includes a wired communication channel or a wireless communication channel.

10 . A storage medium storing a control program that, when executed by a processor, causes the processor to perform the method according to claim 1 .

11 . A first control device comprising:
a processor configured to, in response to detecting a target-type fault, determine a control signal for instructing a first load to stop operating, the first load being connected to one of buses of a three-phase three-level power supply circuit, and the target-type fault being correlated with a second load connected to two of the buses of the three-phase three-level power supply circuit; and a target communication channel configured to communicate with a second device to transmit the control signal to the second control device, to instruct the second control device to control the first load to stop operating.

12 . The first control device according to claim 11 , wherein:
the target-type fault includes at least one of a shutdown fault of the second load or an over-voltage fault of a first capacitor; and the first capacitor is an energy storage capacitor in the three-phase three-level power supply circuit other than a second capacitor connected in parallel with the first load.

13 . The first control device according to according to claim 11 , wherein:
the control signal is a first control signal; the three-phase three-level power supply circuit includes:
a first capacitor; and
a second capacitor connected in parallel with the first load;
a transmission channel for transmitting a second control signal and the target communication channel exist between the first control device and the second control device, the second control signal including an operating parameter of the first control device for controlling the first load; and the processor is further configured to:
in response to that the first control signal is in a form of data frame, send the first control signal to the second control device via the target communication channel according to a preset time interval, the preset time interval being shorter than a time period re

Assignees

• Foshan Shunde Midea Electric Science And Tech Co Ltd
• Gd Midea Air Conditioning Equipment Co Ltd

Inventors

• Huang Zhenghui
• Long Tan
• Wen Xianshi
• Wei Dong
• Zhao Ming

Classifications

• H02M7/217 Primary

  using semiconductor devices only · CPC title

• H02H1/0007

  concerning the detecting means (in general G01R or other subclasses of G01; reed switches H01H71/2445) · CPC title

• H02J9/062

  for AC powered loads · CPC title

• H02M1/009

  having two or more independently controlled outputs (for DC-DC converter with intermediate AC H02M3/33561) · CPC title

• H02M7/487

  Neutral point clamped inverters · CPC title