Single inductor double buck full bridge inverter
A full-bridge inverter and single-inductor technology, applied in the direction of adjusting electrical variables, instruments, electrical components, etc., can solve the problems of large harmonic content in the output waveform of the bridge arm, low utilization rate of DC voltage, high switching frequency, etc., to achieve Effects of reduced circuit size and weight, reduced voltage stress, and high reliability
Inactive Publication Date: 2017-01-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
Like traditional half-bridge inverters, DBI has the following disadvantages: DBI requires external positive and negative DC bus voltages, whose amplitude exceeds twice the maximum output voltage, low DC voltage utilization, and device voltage stress is twice the input voltage , not suitable for high-voltage input occasions; the bridge arm can only output +1 and -1 two-state levels, and it works in bipolar modulation mode. The output waveform of the bridge arm has a large harmonic content, which requires a higher switching frequency and a larger filter device
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[0020] Such as figure 1 As shown, the first power triode switch tube S in the single-inductance double Buck full-bridge inverter of the present invention 1 The drain is connected to the positive pole of the external power supply U; the first power triode switch S 1 The source and the third power triode switch S 3 The drain is connected to the fifth power transistor S 5 The drain of the third power transistor S 3 The source of the external power supply U is connected to the negative pole; the second power triode switch S 2 The drain is connected to the positive pole of the external power supply U; the fourth power triode switch S 4 The source of the external power supply U is connected to the negative pole; the second power triode switch S 2 The source and the fourth power triode switch S 4 The drain of the output filter capacitor C is connected to one end of the load R; the output filter capacitor C is also connected to the other end of the load R, and is connected to on...
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The invention relates to a single-inductor dual-buck full-bridge inverter comprising a reversing circuit and a dual-buck circuit, so that inversion is realized by the reversing circuit. According to the invention, with the inverter, a bridge arm straight problem at the traditional circuit can be solved. Compared with the traditional half-bridge inverter, the provided single-inductor dual-buck full-bridge inverter enables the voltage stress of the power device to be reduced and thus is suitable for occasions with high voltage and high power. Compared with the dual-buck inverter (DBI) circuit, the circuit of the single-inductor dual-buck full-bridge inverter has the advantages that only one filter inductor is needed to reduce the size and the weight of the whole circuit and the corresponding loss and the conversion efficiency is high. The control scheme is simple and is easy to realize; and high reliability is realized.
Description
[0001] Technical field: [0002] The invention relates to a single-inductance double-Buck full-bridge inverter, which belongs to an inverter in an electric energy conversion device. [0003] Background technique: [0004] With the development of power electronics technology, inverters have been extensively researched and applied. Dual Buck Inverter (DBI for short) is a new inverter topology that has been proposed and extensively studied in recent years. Compared with traditional push-pull and full-bridge inverters, DBI has the outstanding characteristics of no bridge arm direct connection and no switch tube parasitic diode reverse recovery problem. It is especially suitable for occasions with high power reliability requirements. DBI provides a simple way to simultaneously achieve high efficiency and high reliability of the inverter, which has high research value and broad development background. Like traditional half-bridge inverters, DBI has the following disadvantages: DBI r...
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IPC IPC(8): H02M3/155
Inventor 洪峰刘军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS