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Tag: Working principle of three-phase half-bridge SPWM inverter

Figure 4 - Test waveforms considering the presence of harmonics in the mains voltage

Application of 12-phase rectifier and passive and active filter in UPS

Posted on June 11, 2022June 11, 2022 by admin

Most of the SCR polyphase phase-controlled rectifiers used in three-phase high-power power frequency UPS use 12-phase rectifiers or 12-phase rectification + 11th harmonic passive filters, which have become a typical power frequency UPS circuit mode, which can Meet the requirements of the national standard GB/T 7260.3 for the harmonic content of the mains input current….

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What is a three-phase half-bridge SPWM inverter?

What is a three-phase half-bridge SPWM inverter?

Posted on December 29, 2021January 5, 2022 by admin

The three-phase half-bridge SPWM inverter is the most widely used inverter in three-phase UPS. Regardless of whether it is a power frequency UPS or a high frequency UPS, whether it is a UPS with an isolation transformer or a UPS without an isolation transformer, this inverter is used as the output of the UPS. 1….

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Recent Posts

  • Comparison of multi-superrectifier characteristics and the influence of load dual-input PF
  • Application of 12-phase rectifier and passive and active filter in UPS
  • Influence of Input Transformer Connection on Harmonic Current
  • What is a 12-phase diode rectifier with transformer injected harmonics?
  • The working principle of the harmonic type SCR phase-controlled 12-phase rectifier

Categories

  • Basic knowledge of IGBT three-phase SPWM inverter
  • Basic knowledge of uninterruptible power supply
  • SCR polyphase phase controlled power frequency rectifier and three-phase boost single switch SPWM PFC rectifier

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AC filter circuit backup UPS Basic circuit of single-phase PWM inverter Basic structure of IGBT Cascade superposition of independent DC power supply Compensation for the influence of dead zone Composition of three-phase full-bridge SPWM inverter computer power Control method of the three-phase four-leg inverter current crest factor Development of inverter technology Double Fourier series analysis High frequency UPS industrial frequency UPS influence of dead zone on output voltage Influence of unbalanced load on DC input current fluctuation Instantaneous space current phasor control method using hysteresis comparator Inverter technology mains grid nature of the load Power frequency UPS power supply quality issues Precautions for using SCR PWM technology SCR multi-phase phase controlled rectifier SCR power switch time single phase capacitor filter rectifier space flux linkage phasor SPWM control SPWM control method SPWM modulation waveform SPWM soft-switching inverter technology Synchronous SPWM modulation The third generation UPS Three-phase half-bridge inverter Thyristor rectifier Transformer in UPS Two-level SPWM inverter Types of spwm multilevel inverters UPS applications Use gate resistance to control IGBT switch Various control methods of ups Working principle of the three-phase four-leg inverter Working principle of three-phase full-bridge SPWM inverter Working principle of three-phase half-bridge SPWM inverter
ups uninterruptible power supply is a UPS power supply that contains energy storage devices, which can be classified according to the characteristics of transformers and the structure of ups electrical circuit.