Control signal modulation circuit, inverter and control system
A technology for controlling signals and modulating circuits, applied in the field of control, can solve problems such as high hardware requirements, and achieve the effect of low hardware cost
Active Publication Date: 2022-05-24
HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD
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Problems solved by technology
However, the current signal interaction between the controller and the control object requires a dedicated communication system or requires high hardware requirements.
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[0052] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0053] See figure 1 , showing a schematic structural diagram of a control signal modulation circuit provided by an embodiment of the present application, the device is obtained based on a DC / DC boost circuit, such as figure 1 As shown, the device includes a DC / DC boost circuit and a control unit.
[0054] The DC / DC boost circuit i...
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The present application provides a control signal modulation circuit, an inverter, and a control system, wherein the control signal modulation circuit is implemented based on a DC / DC boost circuit, and the DC / DC boost circuit includes a controllable switch circuit, which is implemented by the controllable switch circuit. The second capacitor is a circuit for charging the first capacitor. When the voltage on the first capacitor reaches the first voltage threshold, the switching state of the first controllable switch is controlled, thereby generating a control signal with a preset characteristic waveform on the first capacitor. The solution is to generate a control signal with a preset characteristic waveform through the charging and discharging process of the first capacitor in the DC / DC boost circuit, so no dedicated signal generator is required, and no power carrier communication module is required, so the hardware cost is low Moreover, compared with the wireless communication method, the control signal generated by this scheme is not affected by distance and has no crosstalk phenomenon, and has no special requirements for the installation site terrain.
Description
technical field [0001] The invention belongs to the technical field of control, and in particular relates to a control signal modulation circuit, an inverter and a control system. Background technique [0002] In the control system, the corresponding signal interaction needs to be performed between the controller and the control object, so as to realize the control of the control object by the controller. For example, in a photovoltaic system, the inverter controls the working state of the photovoltaic string, which requires signal interaction between the inverter and the photovoltaic string. However, the signal interaction between the current controller and the control object needs to be realized by a dedicated communication system, or requires high hardware. Therefore, there is an urgent need for a control signal modulation scheme that does not require a dedicated communication system and has a lower hardware cost. SUMMARY OF THE INVENTION [0003] In view of this, the...
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IPC IPC(8): H02M3/07H02M7/44
CPCH02M3/07H02M7/44H02M3/158H02M1/32H02M1/36Y02E10/56H02M1/007H02M7/42H02J2300/24H04B3/548H02J3/381H02M3/156
Inventor 杨宗军李晓光
Owner HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD