Power bypass apparatus with current-sharing function and method of controlling the same

Patent metadata

Field	Value
Publication number	US-10734835-B2
Application number	US-201816052914-A
Country	US
Kind code	B2
Filing date	Aug 2, 2018
Priority date	Dec 20, 2017
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A power bypass apparatus with a current-sharing function includes at least two bypass switch assemblies and a control unit. Each bypass switch assembly includes a controllable switch, a cooling unit, and a temperature detection unit. Each the temperature detection unit, correspondingly disposed to a heat-dissipating unit, detects a temperature value of the controllable switch to produce a temperature detection signal. The control unit receives the temperature detection signals and outputs at least two switch control signals to control at least one of the controllable switches or outputs at least two cooling unit control signals to control at least one of the cooling units, thus making currents flowing through the controllable switches identical. Accordingly, it is to increase overall efficiency of a power system and implement current-sharing function of the power system providing high power.

First claim

What is claimed is:

1. A power bypass apparatus with a current-sharing function comprising:
at least two bypass switch assemblies correspondingly applied to at least two power supplies, and each bypass switch assembly comprising:
a controllable switch disposed on a heat dissipation unit;
a cooling unit correspondingly disposed to the heat dissipation unit, and the cooling unit configured to cool the controllable switch according to a cooling capacity of the cooling unit; and
a temperature detection unit correspondingly disposed to the heat dissipation unit, and the temperature detection unit configured to detect a temperature value of the controllable switch and produce a temperature detection signal having information of the temperature value; and

a control unit coupled to the at least two bypass switch assemblies and configured to receive the temperature detection signals;
wherein the control unit is configured to output at least two switch control signals and at least two cooling unit control signals corresponding to the at least two bypass switch assemblies according to the temperature detection signals, and control a switch turned-on duration of at least one of the controllable switches according to the at least two switch control signals or control a cooling capacity of at least one of the cooling units according to the at least two cooling unit control signals so that current values flowing through the controllable switches are identical.

2. The power bypass apparatus with the current-sharing function in claim 1 , wherein the switch turned-on duration of the at least one of the controllable switches is fully turned-on.

3. The power bypass apparatus with the current-sharing function in claim 2 , wherein each of the controllable switches has a negative temperature coefficient (NTC) characteristic.

4. The power bypass apparatus with the current-sharing function in claim 3 , wherein each of the controllable switches is a triode AC semiconductor switch (TRIAC), and at least one of the switch control signals is configured to correspondingly control a trigger angle of the TRIAC so that the switch turned-on duration of the at least one of the controllable switches is controlled.

5. The power bypass apparatus with the current-sharing function in claim 4 , wherein the switch turned-on duration of the TRIAC is decreased, the current value flowing through the TRIAC is decreased; when the switch turned-on duration of the TRIAC is increased, the current value flowing through the TRIAC is increased.

6. The power bypass apparatus with the current-sharing function in claim 3 , wherein each of the controllable switches is a silicon controlled rectifying module composed of two silicon controlled rectifiers connected inverse parallel to each other, and at least one of the switch control signals is configured to correspondingly control a trigger angle of the silicon controlled rectifying module so that the switch turned-on duration of the at least one of the controllable switches is controlled.

7. The power bypass apparatus with the current-sharing function in claim 6 , wherein the switch turned-on duration of the silicon controlled rectifying module is decreased, the current value flowing through the silicon controlled rectifying module is decreased; when the switch turned-on duration of the silicon controlled rectifying module is increased, the current value flowing through the silicon controlled rectifying module is increased.

8. The power bypass apparatus with the current-sharing function in claim 1 , wherein the cooling unit is a fan unit, and the cooling unit control signal is configured to control a speed of the fan unit.

9. The power bypass apparatus with the current-sharing function in claim 8 , wherein when the speed is increased, the cooling capacity of the cooling unit is increased so that the temperature value of the controllable switch is decreased and the current value flowing through the controllable switch is decreased; when the speed is decreased, the cooling capacity of the cooling unit is decreased so that the temperature value of the controllable switch is increased and the current value flowing through the controllable switch is increased.

10. A power bypass apparatus with a current-sharing function comprising:
at least two bypass switch assemblies correspondingly applied to at least two power supplies, and each bypass switch assembly comprising:
a first controllable switch disposed on a heat dissipation unit;
a second controllable switch disposed on the heat dissipation unit and coupled in parallel to the first controllable switch;

a cooling unit correspondingly disposed to the heat dissipation unit, and the cooling unit configured to cool the first controllable switch and the second controllable switch according to a cooling capacity of the cooling unit; and
a temperature detection unit correspondingly disposed to the heat dissipation unit, and the temperature detection unit configured to detect a temperature value of the first controllable switch and the second controllable switch and produce a temperature detection signal having information of the temperature value; and
a control unit coupled to the at least two bypass switch assemblies and configured to receive the temperature detection signals;
wherein the control unit is configured to output at least two switch control signals and at least two cooling unit control signals corresponding to the at least two bypass switch assemblies according to the temperature detection signals, and control a switch turned-on duration of one of the first controllable switch and the second controllable switch according to the at least two switch control signals or control a cooling capacity of at least one of the cooling units according to the at least two cooling unit control signals so that current values flowing through the first controllable switch and the second controllable switch are identical.

11. The power bypass apparatus with the current-sharing function in claim 10 , wherein the switch turned-on duration of the at least one of the first controllable switches and the second controllable switches is fully turned-on.

12. The power bypass apparatus with the current-sharing function in claim 11 , wherein each of the first controllable switches and the second controllable switches has a negative temperature coefficient (NTC) characteristic.

13. The power bypass apparatus with the current-sharing function in claim 12 , wherein each of the first controllable switches and the second controllable switches is a triode AC semiconductor switch (TRIAC), and at least one of the switch control signals is configured to correspondingly control a trigger angle of the TRIAC so that the switch turned-on duration of the at least one of the first controllable switches and the second controllable switches is controlled.

14. The power bypass apparatus with the current-sharing function in claim 12 , wherein each of the first controllable switches and the second controllable switches is a silicon controlled rectifying module composed of two silicon controlled rectifiers connected inverse parallel to each other, and at least one of the switch control signals is configured to correspondingly control a trigger angle of the silicon controlled rectifying module so that the switch turned-on duration of the at least one of the first controllable switches and the second controllable switches is controlled.

15. A current-sharing control method applied to a power bypass apparatus having at least two power supplies; the power bypass apparatus comprising at least two bypass switch assemblies and a co

Assignees

• Delta Electronics Inc

Inventors

• Kao Chao-Li
• Lin Hung-Chieh
• Kuo Chao-Lung
• Hsieh Yi-Ping
• Huang jin-zhong
• Tseng Po-Hsin

Classifications

• H02J3/46 Primary

  Controlling the sharing of generated power between the generators, sources or networks · CPC title

• H02J3/0075

  for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch · CPC title

• H02J9/061 Primary

  for DC powered loads · CPC title

• Y02E40/70

  Smart grids as climate change mitigation technology in the energy generation sector · CPC title

• Y04S10/50

  Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications · CPC title