Three Phase Inverter Motors - PowerPoint PPT Presentation

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Three Phase Inverter Motors

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    1. Three Phase Inverter Motors Ben Kemink

    2. 2 At the end of this training session you will have learned; There are different three-phase measurements. Pulse Width Modulation. Inverter Driven Applications mess-up with Period Time T.

    3. 3 Three Phase Systems

    4. 4 Why Poly-Phase?

    5. 5 Why 3 Phase and not 7?

    6. 6 Three Phase is ideal

    7. 7 Three-Phase Three-Wire

    8. 8 Three-Phase Four-Wire

    9. 9 Three-Voltage Three-Current

    10. 10 Three-Phase Three-Wire with PT & CT

    11. 11 Introduction What is Three phase? Three phase = three signals Phase shift: 1200

    12. 12 Pulse Width Modulation of a Sine Wave

    13. 13 Demonstration circuit Demonstration circuit consists of: Frequency inverter; 3-Phase Electromotor; Power meter;

    14. 14 Demonstration circuit Freq. inverter Step 1: AC ? DC Step 2: DC ? 3-Phase

    15. 15 Demonstration circuit AC ? DC Performed by rectifier; DC-signal is smoothened by capacitor; In 3phase mains the output of the rectifiers is connected to the same capacitor;

    16. 16 Demonstration circuit Freq. inverter Step 2: regeneration of 3-Phase-signals Six switches Generate periodic pulse-trains; Insulated Gate Bipolair Transistor (IGBT); High frequency switches;

    17. 17 Demonstration circuit Freq. inverter

    18. 18 Running the motor Direction Direction (CCW or CW) Can be changed by manipulating the pulses

    19. 19 Running the motor Speed Depends on the switching frequency

    20. 20 Running the motor Faster 1s time window

    21. 21 Now you have learned; There are different three-phase measurements. What Pulse Width Modulation is. Why Inverters mess-up with Period Time T.

    22. 22