PFC Power Supply System In The High Power Laser Research

In the maturing of active power factor correction technology, the single-phase PFC technology has been perfect. Three-phase PFC technology has been a comprehensive, in-depthresearch, from the topology point of view, for different specifications of the circuit structure, from the three-phase single-switch to double-switch, three switches, four switches, six or even more complex switching circuit have emerged. The most commonly used in DCM (discontinuous conduction inductor current) and CCM (continuous conduction inductor current) control mode, for example:in the low-power field, the general DCM control mode; high-power filed, usually the use of CCM control mode. In two specific control mode, the ability to find a threshold power, output power in accordance with the specific parameters of the circuit, we can clearly choose the use of a control mode, which is the paper to achieve the ultimate goal.The papers will be double-switch three-phase APFC circuit, the use of DCM control mode, for example, demonstrated its low-power field in the limit beyond the control of the power of lOkW APFC circuit design. A mathematical model and its simulation, and ultimately failed toachieve the desired vision, confirming the idea of the problem is not realistic. Reference-based research in this field at home and abroad, have been up to6-8kW output power. Within the capacity of existing technology, to achieve power factor similar to "1" in the DCM control mode, three-phase APFC circuit output power is less than lOkW. So10KW output power limit for this mode of power.