Storage medium, method, device and system for adjusting output voltage of bidirectional resonant circuit
A resonant circuit and output voltage technology, which is applied in control/regulation systems, output power conversion devices, and electrical variable adjustments, can solve the problem of difficult realization of full-bridge LLC resonant circuits, affecting system conversion efficiency and thermal management, and resonant topology output Problems such as limited voltage adjustment range, to achieve the effect of expanding the adjustment range
Active Publication Date: 2020-05-05
XIAN TGOOD INTELLIGENT CHARGING TECH CO LTD +1
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Problems solved by technology
[0002] One-way resonant topology, such as full-bridge LLC resonant circuit, has the problem of narrow output voltage regulation range during operation, especially when output voltage is required, full-bridge LLC resonant circuit is difficult to implement
At present, in order to widen the output voltage range of the resonant topology, the method of combining PFM (pulse frequency modulation) + PWM (pulse width modulation) control strategy is generally used, but this method has a limited range of output voltage adjustment for the resonant topology. Especially when the output is light-loaded, reducing the output voltage has always been a major problem in the industry
In addition, when the PWM control strategy is used, the soft switching function of the resonant topology will be lost, which will affect the conversion efficiency and thermal management of the system.
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[0036]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0037] see figure 1 , the embodiment of the present ...
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The invention provides a storage medium, a bidirectional resonant circuit output voltage regulation method, a device and a system, which relate to the technical field of power electronics. When the current at the output terminal is greater than a preset light load output threshold value and the difference between the detected voltage at the output terminal and the preset target voltage value is greater than the preset threshold voltage, A control signal is output to control the unit step length time of advanced turning on and advanced turning off of the fifth controllable switching transistorand the eighth controllable switch tube relative to the first controllable switch tube and the fourth controllable switch tube, and outputs a control signal to control unit step length time of advanced turning on and advanced turning off of the sixth controllable switch tube and the seventh controllable switch tube relative to the second controllable switch tube and the third controllable switch tube; When the difference between the voltage detected at the current output terminal and the preset target voltage value is smaller than the preset threshold voltage, the control bidirectional resonance circuit maintains the current control timing, thereby realizing the expansion of the regulating range of the output voltage.
Description
technical field [0001] The present invention relates to the technical field of power electronics, in particular, to a method, device and system for adjusting the output voltage of a storage medium and a bidirectional resonant circuit. Background technique [0002] The unidirectional resonant topology, such as the full-bridge LLC resonant circuit, has the problem of narrow output voltage regulation range during operation, especially when the output voltage is required, the full-bridge LLC resonant circuit is even more difficult to implement. At present, in order to widen the output voltage range of the resonant topology, the method of combining PFM (pulse frequency modulation) + PWM (pulse width modulation) control strategy is generally used, but this method has a limited range of output voltage adjustment for the resonant topology. Especially when the output is light-loaded, reducing the output voltage has always been a major problem in the industry. In addition, when the P...
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IPC IPC(8): H02M3/335
CPCH02M3/33507H02M3/3353H02M3/33584
Inventor 赵佳超
Owner XIAN TGOOD INTELLIGENT CHARGING TECH CO LTD