Control method and device of DC/DC converter

A control method and converter technology, which can be used in output power conversion devices, conversion equipment without intermediate conversion to AC, control/regulation systems, etc., can solve the problem of thermal imbalance between switching tubes, large effective current, and large temperature difference. And other issues

Active Publication Date: 2019-06-14
DELTA ELECTRONICS SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a control method and device for a DC/DC converter, which solves the problem that the effective current of S6/S8 will be very large due to the phase-shift control metho

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  • Control method and device of DC/DC converter
  • Control method and device of DC/DC converter
  • Control method and device of DC/DC converter

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Embodiment 1

[0070] Figure 4 The flow chart of the control method of the DC / DC converter provided by Embodiment 1 of the present invention, such as Figure 4 As shown, the execution subject of the DC / DC converter control method provided in this embodiment is the DC / DC converter control device, and the DC / DC converter control method provided in this embodiment includes the following steps.

[0071] Step 101, provide the sixth signal, the fifth signal, the seventh signal and the eighth signal, the switching frequency of the sixth signal, the fifth signal, the seventh signal and the eighth signal is the switching frequency of the driving signal of each switching tube on the primary side Half, the phase difference between adjacent signals of the sixth signal, the fifth signal, the seventh signal and the eighth signal is a preset angle, and the phase difference between the sixth signal and the driving signal of the first switch tube is a phase shift angle.

[0072] In this embodiment, the DC / ...

Embodiment 2

[0087] Figure 5 The flow chart of the control method of the DC / DC converter provided by Embodiment 2 of the present invention, such as Figure 5 As shown, the DC / DC converter control method provided in this embodiment is based on the DC / DC converter control method provided in Embodiment 1 of the present invention, and the sixth signal, the fifth signal, and the seventh signal in step 101 are The phase difference between the adjacent signals of the eighth signal and the eighth signal is a further refinement of the preset angle, and the sixth signal, the fifth signal, the seventh signal and the eighth signal are used as driving signals. Then, the control method of the DC / DC converter provided in this embodiment includes the following steps.

[0088] Step 201, provide the sixth signal, the fifth signal, the seventh signal and the eighth signal, the switching frequency of the sixth signal, the fifth signal, the seventh signal and the eighth signal is the switching frequency of t...

Embodiment 3

[0100] Figure 7 The flow chart of the control method of the DC / DC converter provided by Embodiment 3 of the present invention, such as Figure 7 As shown, the DC / DC converter control method provided in this embodiment is based on the DC / DC converter control method provided in Embodiment 1 of the present invention, and the sixth signal, the fifth signal, and the seventh signal in step 101 are The phase difference between the adjacent signals of the eighth signal and the eighth signal is a further refinement of the preset angle, and the sixth signal, the fifth signal, the seventh signal and the eighth signal are used as driving signals. Then, the control method of the DC / DC converter provided in this embodiment includes the following steps.

[0101] Step 301, provide the sixth signal, the fifth signal, the seventh signal and the eighth signal, the switching frequency of the sixth signal, the fifth signal, the seventh signal and the eighth signal is the switching frequency of t...

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Abstract

The invention provides a control method and device for a DC/DC converter. The method comprises: the switching frequencies of a sixth signal, a fifth signal, a seventh signal and an eighth signal are half of the switching frequencies of the driving signals of primary switch tubes, the phase difference between adjacent signals of the sixth signal, the fifth signal, the seventh signal and the eighthsignal is a preset angle, and the phase difference between the sixth signal and the driving signal of the first switch tube is a phase shift angle; the sixth signal, the fifth signal, the seventh signal and the eighth signal are used as driving signals to drive the sixth switch tube, the fifth switch tube, the seventh switch tube and the eighth switch tube, respectively; alternatively, the sixth signal, the fifth signal, the seventh signal, and the eighth signal are used as intermediate signals, and the driving signals of the secondary switch tubes are generated according to the driving signalof the at least one primary switch tube and the intermediate signal, and the driving signals of the secondary switch tubes drive the switch tubes corresponding to the secondary side, thereby realizing thermal equalization among the secondary switch tubes.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of energy storage, and in particular to a control method and device for a DC / DC converter. Background technique [0002] With the rapid development of new energy and electric vehicle technology, bidirectional DC / DC converters that can realize power bidirectional flow function are more and more widely used in new energy, battery energy storage and other fields. An excellent bidirectional DC / DC converter control method is of great significance to promote the application of new energy and alleviate the energy crisis. [0003] figure 1 It is a schematic diagram of the circuit structure of a resonant bidirectional DC / DC converter, such as figure 1 As shown, the resonant bidirectional DC / DC converter is a typical bidirectional DC / DC converter. In the prior art, a control method of phase shifting and frequency conversion is used to control the resonant bidirectional DC / DC converter. In the...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33584H02M3/3376H02M1/0058H02M1/327Y02B70/10H02M3/07H02M3/1584H02M3/33523H02M3/33546H02M3/33576H02M3/33592H02M1/009H02M3/1586
Inventor 孙浩贾民立章进法
Owner DELTA ELECTRONICS SHANGHAI CO LTD
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