1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

DC link capacitor values calculation in a 2 leg inverter

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by Stagmang, Jul 10, 2017.

  1. Stagmang

    Stagmang New Member

    Jul 10, 2017
    Dear All,
    I would like to know the formula to calculate the capacitance for two capacitors whose midpoint is connected to a third phase of brushless dc motor (For simplification one can consider "series RL" load connected in WYE or DELTA fashion). Overall its about driving a 3 phase motor with 4 mosfets/igbt connected to 2 of the phases and one phase to dc link midpoint. I am not understanding how to calculate the capacitor values as winding's of load may have an impact on them. What all factors impact the capacitance value calculation?
    If suppose Vdc supply voltage, inverter output frequency, RL load values, rated speed and rated current of motor winding's known.
    Kindly give me your valuable inputs.
    Thank you in advance

Share This Page