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IXGH60N60C3D1 Datasheet(PDF) 4 Page - IXYS Corporation |
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IXGH60N60C3D1 Datasheet(HTML) 4 Page - IXYS Corporation |
4 / 4 page The figure on the left illustrates a general circuit topology of an inverter welding power source. This circuit topology is composed of four stages: A) Rectifier stage, B) PFC & Boost stage, C) Power stage, and D) Output stage. Input power from a power grid enters the rectification stage to be rectified to a DC value and is processed via a power factor correction boost converter. From there it enters the power stage which employs a full bridge inverter to convert the voltage back to AC at high frequencies typically from 50Khz to 100Khz. The AC signal is then stepped down via T1 transformer which then gets rectified and smoothed out at the output stage. The figure on the right illustrates an AC motor drive that utilizes a resonant DC link inverter. A resonant link (L1, C2) is affixed to the DC bus line of a pulse width modulation inverter. The resonant link is then ‘excited’ and maintains resonance through the control of the IGBTs in a way that the resonating dc voltage bus frequently reaches zero volts. The IGBTs are turned on and off at zero voltage and are synchronized to match the zero voltage crossings to achieve the desired low switching loss. An active clamp circuit (Q7, C1) is added to clamp down unwanted overshoot when the DC inverter current decreases abruptly caused by the switching behavior of the IGBTs. C2 Motor Q1 Q2 Q3 Q4 Q5 Q6 Q7 C1 3-Phase AC Gate Drive Controller Vs L1 C1 Q2 Q3 Q4 Q5 D1 D3 D2 D4 Q1 D5 D6 D7 R1 C2 C3 R2 C4 C5 230VAC Rectifier Power Factor Correction Boost Converter Power Stage Full Bridge Inverter Step Down Transformer Output Stage Vout+ Work Clamp PFC Controller Gate Drive Controller L1 L2 www.ixys.com PB60IGBTA3B3C3 1.4 January 2009 Multi-Process High Frequency Inverter Welder AC Motor Drive (Resonant DC Link Inverter) applIcaTIons Power inverters Uninterruptible power supplies Motor drives Switch mode power supplies Power factor correction circuits Welding machines Lamp ballasts feaTures Optimized for low switching & conduction losses Square RBSOA High current handling capability International standard packages BenefITs High power density Low gate drive requirement |
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