GROUNDING METHOD FOR THREE-PHASE HIGH-FREQUENCY PULSE WIDTH MODULATION CURRENT SOURCE RECTIFIER CIRCUIT
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United States of America
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Jan 9, 2025
app pub date -
Sep 20, 2024
filing date -
Sep 20, 2024
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Abstract
A grounding method for a three-phase high-frequency PWM CSR circuit, includes: connecting the three-phase high-frequency PWM CSR circuit in a non-direct grounding neutral circuit of a low-voltage winding of a transformer; connecting a first capacitor C4 and a second capacitor C41 between positive and negative DC busbars of the three-phase high-frequency PWM CSR circuit, where the first capacitor C4 and the second capacitor C41 are connected in series with equal capacitances; and arranging a control grounding point at a midpoint between the first capacitor and the second capacitor to stabilize and balance voltages of the positive and negative DC busbars relative to ground. The grounding method can stabilize and balance the voltages of the positive and negative DC busbars relative to ground output of the three-phase high-frequency PWM CSR circuit, reduce energy consumption, and make the three-phase high-frequency PWM CSR circuit safe and reliable to use.
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