In order to solve the problem that the current sensor increases the system cost and volume in the traditional current mode control

an integrated current observer is proposed. Firstly

the structure of Boost converter system based on current mode control with integral current observer is introduced. The variation law of inductor current is analyzed and the duty cycle algorithm is derived. Then based on the variation law of the inductor current

an integrated current observer is proposed. Finally

the proposed current observer is verified by simulation and experiment

the experimental results show that the error between the current estimated by the integrated current observer and the actual inductor current is within 4.375%

and the observed current can quickly and accurately estimate the actual inductance current when the input voltage and load change.