Solar cell applying push-pull converter

Abstract

The invention discloses a solar cell applying a push-pull converter. The solar cell comprises an input light collection module and the push-pull converter, the push-pull converter comprises two switching devices S1 and S2, an isolating transformer T, rectifying diodes D1 and D2, an energy storage inductor L, an energy storage capacitor C, a load R, an auxiliary coil Lau coupled to the energy storage inductor L, a PWM (pulse width modulation) controller and an output voltage calculator, the output voltage calculator determines a real-time output value Uout of output voltage according to measured voltage Udet of the auxiliary coil Lau, number-of-turns N1 of a primary winding of the isolating transformer T, number-of-turns N2 of a secondary winding, input voltage Uin, voltage drop of the diodes D1 and D2, turn-on time of the switching devices and a transformation ratio alpha of the auxiliary coil Lau coupled to the energy storage inductor L, and the PWM controller generates a PWM driving signal according to the real-time output value so as to control turn-on or turn-off of the switching devices S1 and S2.

Description

【Technical field】 [0001] The invention relates to a solar battery, in particular to a solar battery using a push-pull DC converter. 【Background technique】 [0002] Since most of the power supplies of mobile refrigeration systems such as car air conditioners, car refrigerators and refrigeration devices used in the field are solar cells or new energy batteries; and the power supply capacity of solar or new energy battery power supply systems is limited and unstable. The adjustment of the power supply can improve the efficiency of the equipment. [0003] Compared with traditional linear power supplies, switching power supplies have the advantages of high efficiency, small size, and high reliability, and are more and more widely used in the fields of computers, communications, electric power, home appliances, instruments, and aerospace. When switching power supplies and inverters powered by lead-acid batteries, how to make them more efficient, smaller in size and higher in ener...

AI Technical Summary

Problems solved by technology

The stability of voltage and current output by this type of power supply system largely depends on the stability of the high voltage output of the previous stage. Whether it is voltage single-loop control or voltage-current double-closed-loop control, the basis is voltage feedback control. The coupled feedback circuit feeds it back to the front-end controller, which increases the complexity of the system and reduces the dynamic performance of the feedback, resulting in inaccurate control (such as figure 1 shown)

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