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In terms of the conventional inverter doesn't match all unbalanced loads, a topology and strategy of nature- decoupling in circuit and magnetic circuit is proposed for aeronautic and military equipment field. Each phase voltage is controlled independently by PI controller and double-loop controller with voltage and current instantaneous feedback, and phase angle by closed-loop control with PLL , which...
The feed-forward control scheme based on SPWM matrix converter is proposed. As a device without DC line, the AC line side abnormal inputs can deteriorate its output characteristics. Tri-carrier is prior modulated by measured envelop of line voltages, to let the pulse width of SPWM get different compensation in each pulse. This paper analyzes compensation principle, introduces realization method, and...
A novel asymmetric 5-level inverter is developed in which a half-bridge diode-clamp inverter and a conventional half-bridge inverter are connected to a common split-capacitor power supply. Analysis of a control technique for the inverter, which incorporates square-wave synthesis in conjunction with unipolar triangle carried-based PWM method, is included. Under the proposed control technique, the new...
An advanced active power filter with one-cycle control method for three-phase four-wire system is presented in this paper. First, the main circuit of APF is analyzed. And then the mathematic model of the controller is given. This active power filter employs a four-leg voltage-source inverter and its controller works with one-cycle controlled method. The functions of the proposed APF include the compensation...
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