Three-level type phase-shifting full-bridge high-power power supply
A high-power power supply, phase-shifting full-bridge technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problem of increasing harmonics, inverter output voltage waveform distortion, etc. problems, to achieve the effect of reducing fluctuations, reducing distortion and harmonic interference, and suppressing the offset of the midpoint voltage
Active Publication Date: 2020-03-06
湖北嘉辰达新能源科技有限公司
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[0003] In view of this, the present invention proposes a three-level phase-shifting full-bridge high-power power supply to solve the problem of unbalanced mid-point voltage of the three-level inverter, which causes distortion of the inverter output voltage waveform and increases harmonics and losses. The problem
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.
[0019] Such as figure 1 shown, combined with figure 2 , the three-level phase-shifted full-bridge high-power power supply of the present invention includes a three-level midpoint clamp inverter, the inverter has two equalizing capacitors C1 and capacitor C2, and the inverter also includes a switch Tube S1, switching tube S2, switching tube S3, diode D1, diode D2, inductor L1, inductor L2, the positive pole of the DC bus of the inverter passes thr...
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The invention provides a three-level type phase-shifting full-bridge high-power power supply comprising a three-level neutral-point clamping inverter. The inverter is provided with two voltage-sharingcapacitors C1 and a capacitor C2. The inverter further comprises a switching tube S1, a switching tube S2, a switching tube S3, a diode D1, a diode D2, an inductor L1 and an inductor L2. The capacitors C1, the capacitor C2, the switching tube S1, the switching tube S2, the switching tube S3, the diode D1, the diode D2, the inductor L1 and the inductor L2 form a voltage balance circuit. The offsetof the midpoint voltage of the DC bus of the three-level midpoint clamping inverter is effectively suppressed, the fluctuation of the midpoint voltage is reduced and the fluctuation of the three-level phase-shifting full-bridge high-power power supply is further reduced.
Description
technical field [0001] The invention relates to the technical field of power supplies, in particular to a three-level phase-shifting full-bridge high-power power supply. Background technique [0002] In the three-level phase-shifted full-bridge high-power power supply, the three-level neutral point clamp inverter (NPC) is topologyd on the basis of the two-level inverter circuit. Since the three-level inverter is the simplest circuit in the multi-level inverter, it is widely used. Compared with the traditional two-level inverter, it has the advantages of reducing harmonics and reducing switching frequency, making low-voltage devices Can be used in high voltage converters. However, the control strategy of the three-level inverter is complicated. When the midpoint voltage is unbalanced, the output voltage waveform of the inverter will be distorted and the harmonics and losses will be increased. Contents of the invention [0003] In view of this, the present invention propos...
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Login to View More IPC IPC(8): H02M7/483H02M1/088H02M1/12
CPCH02M1/088H02M1/12H02M7/483
Inventor 陈华贵于海峰周磊胡建民刘洋
Owner 湖北嘉辰达新能源科技有限公司