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The converter combines the advantages of the PWM technique and soft-switching technique, the PWM is effected all over the whole loads range, and soft-switching is effeted only in the switching transition period, the ZVS of leading-leg is achieved by using the energy stored in leakage inductor of the transformer and the output inductor, the ZCS of lagging-leg is achieved by using a blocking DC capacitor, the ZVS and ZCS are achieved for the whole load ranges (5A~250A).
控制电路采用相移控制方式,综合了PWM控制和软开关技术的优点,在大范围内实现PWM控制,而在功率器件换流期间实现软开关换流,其中超前桥臂利用变压器的漏感,实现了零电压开关,滞后桥臂利用隔直电容,实现了零电流开关,并且整个变换电路能在(5A~250A)的范围内实现软开关工作条件,满足弧焊电源负载变化大的特点。
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The device includes on-chip Hall voltage generator for magnetic sensing, the error amplifier that amplifies the Hall voltage, a comparator that is to provide switching hysteresis for noise rejection, the bi-direction drivers for sinking and driving large current load, and the frequency generator thatprovides a signal proportional to rotation speed.
该器件包括片上大厅为磁场传感,误差放大器,放大的霍尔电压,比较器是提供切换噪音抑制滞后电压发生器,双向驱动的吸收和大电流负载,频率方向司机发电机提供了一个信号,转速成正比。
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The ZCS condition for lagging switches under wide load range is provided by a secondary auxiliary circuit, and an unbalanced-voltage-division flaw which inheres in ZVS half-bridges in series hybrid DC-DC converter is overcome in the proposed converter, consequently the converter is more practical.
利用副边的辅助电路在宽负载范围内实现了滞后管的零电流软开关,并克服了以前出现的ZVS半桥串联混合式直流变换器所存在的2个半桥分压不均衡的固有缺点,从而使该类拓扑更加实用。
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Compared with the conditional PS-FB DC/DC converter, it nearly decreased half of the circumfluence energy, and realized ZVS of the lagging switches in a wider load scope with a dinky duty circle loss. It improved the efficiency of the converter effectively.
与传统电路相比,它将近降低了1/2的开关管的环流能量损耗,并且能够在较宽的负载范围内实现滞后管零电压开关和极小的占空比丢失,有效地提高变换器的效率。
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lagging filter:迟滞滤波器
停滞电流 lagging current | 迟滞滤波器 lagging filter | 滞后负载 lagging load
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lagging load:滞后负载
lagging device 滞后装置 | lagging load 滞后负载 | lagging phase 滞后相位
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lagging load:电流滞后的负载
lagging edge 后沿 | lagging load 电流滞后的负载 | lagging material 保温材料
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lagging load:电感性负载,滞(后负)载
lagging current 滞后电流 | lagging load 电感性负载,滞(后负)载 | lagging phase 滞后相位,滞相