January 09, 2025

Inverter Circuit Design Based on ARM Control

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM
RF cable can be customized for other specifications
Photocoupler

Overview:
This design uses ARM as the control core, combined with push-pull boost circuit and SPWM inverter circuit, realizes the conversion of 12VDC input voltage to 110VAC AC sinusoidal voltage output. Experiments show that the inverter has the characteristics of small voltage ripple, high dynamic response and full digital, which can meet the actual needs.


1. System overall plan
1.1 Overall design block diagram As shown in Figure 1, the inverter system consists of a boost circuit, an inverter circuit, a control circuit and a feedback circuit. The DC12V of the low-voltage DC power supply is boosted, rectified and filtered by the booster circuit to obtain about DC170V high-voltage direct current, and then filtered by the DC/AC conversion and LC filter of the full-bridge inverter circuit to obtain AC110V sinusoidal alternating current.
The inverter uses the ARM controller as the control core. The feedback signal of the output voltage and current is processed by the feedback circuit and then enters the on-chip AD of the ARM processor. After the AD conversion and the digital PI operation, the corresponding SPWM pulse signal is generated, and the SPWM is changed. The modulation ratio can change the output voltage to complete the closed-loop control of the entire inverter.


(Please read the PDF for details)

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