A Modeling and Analysis Method for Switching Power Converter with Digital Current Mode Control
A digital controller, digital current technology, applied in the direction of converting DC power input to DC power output, output power conversion device, adjusting electrical variables, etc., to achieve the effect of improving accuracy and simple and intuitive model
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[0032] Such as Figure 4 As shown, the modeling and analysis method of the switching power converter controlled by digital current mode in this embodiment includes the following steps:
[0033] S100. Establish a transfer function of the power stage circuit of the switching power converter by using the state space averaging method;
[0034] S200, write out the transfer function of the zero-order hold circuit of the digital controller and the delay transfer function in the digital control loop;
[0035] S300. Write down the detection gain of the output voltage and the detection gain of the inductor current, including the A / D conversion gain;
[0036] S400. According to the law of digital current mode control, the transfer function G representing the law of current control is obtained c , and on this basis, a voltage loop compensator G is designed v , to complete the modeling of the whole digital current mode control switching power converter system;
[0037] S500. Finally, t...
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