Soft-switching auxiliary circuit
地域：
Hsin-Chu
摘要
A soft-switching auxiliary circuit is provided, which may be applicable to a converter including a first main switch and a second main switch. The soft-switching auxiliary circuit may include a first auxiliary switch, a second auxiliary switch, a first energy adjustment module and a second energy adjustment module. By means of the first auxiliary switch and a second auxiliary switch, the first energy adjustment module and the second energy adjustment may properly store and adjust the energy of the converter; therefore, both the first main switch and the second main switch of the converter can achieve soft-switching.
說明書
All related applications are incorporated by reference. The present application is based on, and claims priority from, Taiwan Application Serial Number 104141177, filed on Dec. 8, 2015, the disclosure of which is hereby incorporated by reference herein in its entirety.
The technical field relates to an auxiliary circuit, in particular to a soft-switching auxiliary circuit.
In general, the switching of the main switch of a converter is hard-switching, which will cause serious loss. For the purpose of solving the above problem, soft-switching technology is developed. Generally speaking, the way to implement soft-switching technology is to integrate an auxiliary circuit with the circuit of a converter for the converter to achieve soft-switching (i.e. zero-current switching and zero-voltage switching).
There are many currently available soft-switching circuits are developed; for example, Taiwan Patent Publication No. 201436437 discloses a high-efficiency bidirectional single-input and multi-outputs DC/DC converter; Taiwan Patent Publication No. 200703857 discloses as high-efficiency bidirectional converter for power sources with great voltage diversity; China Patent Publication No. 104143919 discloses a bidirectional DC converter; however, the above currently available soft-switching circuits still have a lot of shortcomings to be overcome.
權利要求
What is claimed is:1. A soft-switching auxiliary circuit applicable to a converter comprising a first main switch and a second main switch, and the soft-switching auxiliary circuit comprising:a first auxiliary switch, one end of the first auxiliary switch being coupled to one end of the first main switch via a first node, wherein the first auxiliary switch comprises a first transistor, and the first transistor is a bipolar junction transistor; a collector of the first transistor is coupled to the first node, and an emitter of the first transistor is coupled to the second node; a first energy adjustment module, one end of the first energy adjustment module being coupled to the other end of the first auxiliary switch via a second node, wherein the first energy adjustment module comprises a first inductor, a second inductor, a first capacitor, a first diode and a second diode; one end of the first inductor is coupled to the second node, and the other end of the first inductor is coupled to one end of the first capacitor via a sixth node; the other end of the first capacitor is coupled to the third node; a positive electrode of the first diode is coupled to the second node and a negative electrode of the first diode is coupled to one end of the second inductor; the other end of the second inductor is coupled to the third node; a positive electrode of the second diode is coupled to the fifth node and a negative electrode of the second diode is coupled to the sixth node; a second energy adjustment module, one end of the second energy adjustment module being coupled to the other end of the first energy adjustment module, the other end of the first main switch, and one end of the second main switch; and a second auxiliary switch, one end of the second auxiliary switch being coupled to the other end of the second energy adjustment module via a fourth node, and the other end of the second auxiliary switch being coupled to the other end of the second main switch via a fifth node. 2. The soft-switching auxiliary circuit of claim 1 , wherein the first energy adjustment module and the second energy adjustment module are DC-link resonant circuits. 3. The soft-switching auxiliary circuit of claim 1 , wherein the converter is a half-bridge converter. 4. The soft-switching auxiliary circuit of claim 1 , wherein the second energy adjustment module comprises a third inductor, a fourth inductor, a second capacitor and a third diode. 5. The soft-switching auxiliary circuit of claim 4 , wherein one end of the second capacitor is coupled to the third node, and the other end of the second capacitor is coupled to one end of the third inductor via a seventh node; the other end of the third inductor is coupled to the fourth node; a positive electrode of the second diode is coupled to the third node, and a negative electrode of the second diode is coupled to one end of the fourth inductor; the other end of the fourth inductor is coupled to the fourth node. 6. The soft-switching auxiliary circuit of claim 5 , wherein the second energy adjustment module further comprises a fourth diode; a negative electrode of the fourth diode is coupled to the first node, and a positive electrode of the fourth diode is coupled to the seventh node. 7. The soft-switching auxiliary circuit of claim 6 , wherein the second auxiliary switch comprises a second transistor, and the second transistor is a bipolar junction transistor; a collector of the second transistor is coupled to the fourth node, and an emitter of the second transistor is coupled to the fifth node. 8. A soft-switching auxiliary circuit applicable to a converter comprising a first main switch and a second main switch, and the soft-switching auxiliary circuit comprising:a first auxiliary switch, comprising a first transistor, and the first transistor is a field-effect transistor; a drain of the first transistor is coupled to a first node, and a source of the first transistor is coupled to a second node; a first energy adjustment module, comprising a first inductor and a first capacitor, wherein one end of the first inductor is coupled to the second node; one end of the first capacitor is coupled to a third node; a second energy adjustment module, one end of the second energy adjustment module being coupled to the other end of the first energy adjustment module, the other end of the first main switch, and one end of the second main switch; and a second auxiliary switch, one end of the second auxiliary switch being coupled to the other end of the second energy adjustment module via a fourth node, and the other end of the second auxiliary switch being coupled to the other end of the second main switch via a fifth node; wherein the first energy adjustment module further comprises a second diode; a positive electrode of the first diode is coupled to the fifth node, and a negative electrode of the first diode is coupled to a sixth node; the other end of the first inductor is coupled to the other end of the first capacitor via the sixth node. 9. The soft-switching auxiliary circuit of claim 8 , wherein the second energy adjustment module comprises a second inductor and a second capacitor. 10. The soft-switching auxiliary circuit of claim 9 , wherein one end of the second capacitor is coupled to the third node, and the other end of the second capacitor is coupled to one end of the second inductor via a seventh node; the other end of the second inductor is coupled to the fourth node. 11. The soft-switching auxiliary circuit of claim 10 , wherein the second energy adjustment module further comprises a second diode; a positive electrode of the second diode is coupled to the seventh node, and a negative electrode of the second diode is coupled to the first node. 12. The soft-switching auxiliary circuit of claim 11 , wherein the second auxiliary switch comprises a second transistor, and the second transistor is a field-effect transistor; a drain of the first transistor is coupled to the fourth node, and a source of the second transistor is coupled to the fifth node.
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