Inverter Low Frequency

Three-phase inverter means that the converted AC voltage is three-phase, namely AC380V. The three-phase power is composed of three AC potentials with the same frequency, the same amplitude, and the phase difference by 120°.

The definition of a three-phase inverter is a converter that converts DC power to AC power. Its basic principle is SPWM. The hardware architecture consists of four power modules forming a single-phase and three-phase bridge circuit, and the bridge output is connected in series between the loads. The low-pass filter element, the control loop has two signal generation sources, one is a triangular wave (modulation wave) generator with a fixed amplitude, and the other is a sine wave generator. The sine wave is modulated by the triangular wave, and the duty cycle is obtained according to The square wave pulse trains with sine regular changes have different modulation ratios. The number of pulse trains with a sine cycle is equal to the frequency of the modulation wave divided by the base frequency).

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