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Type: Posts; User: electricuwe

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  1. Replies
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    234

    Hi, the accurate timing is especially...

    Hi,

    the accurate timing is especially important when you are using high switching frequencies. If there are to large tolerances in timing this will require large deadtime/interlock delay time,...
  2. You should consider that SiC switches up to 10x...

    You should consider that SiC switches up to 10x faster than silicon. Hence dV/dt of 100 kV/us is not unusual. Hence it is important to chose drives and driver power supplies with very low coupling...
  3. Replies
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    130

    We have provided two pairs of gate sources pins...

    We have provided two pairs of gate sources pins to minimize gate circuit inductance.

    For optimum driving place the driver in the center in between the the two sets of control pins and provide...
  4. Replies
    1
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    131

    Dear Gyro, when switching SiC-Mosfets with a...

    Dear Gyro,

    when switching SiC-Mosfets with a strong driver, a low gate resistor value and low additional parasitic capacitance dV/dt values of 50..100 kV/us can be reached. This is good to...
  5. Replies
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    107

    When considering the use of SiC in drives, you...

    When considering the use of SiC in drives, you have a clear target in mind.

    Usually an increase of switching frequency (compared to today's drives using IGBTs) will not provide a benefit. Motor...
  6. Hi Zhao, hard commutation and use of...

    Hi Zhao,

    hard commutation and use of synchronous rectification are topics that are not directly related.

    The body diode of our CoolSiC-Mosfet is suitable for hard commutation, because it is a...
  7. Replies
    2
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    307

    Hi Walter, yes, we do have such plans. 650 V...

    Hi Walter,

    yes, we do have such plans. 650 V will follow as Discrete part and 1700 V in 62mm and XHP. In case you have a concrete project please ask for schedule ans samples via your sales...
  8. Replies
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    1,574

    Also for the Easy modules 0 V can be used in case...

    Also for the Easy modules 0 V can be used in case simplicity of the design has priority vs. switching speed. With a higher turn-on gate resistor the dV/dt can be reduced to a level that also modules...
  9. Hi AnniLe, some details on SC (e.g. example...

    Hi AnniLe,

    some details on SC (e.g. example waveform) you can find in the following Application note:
    ...
  10. Replies
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    697

    View Post

    Hi Max Power, hi Fränce,

    dV/dt of SiC Mosfets can be quite high, up to 100 kV/us, for our CoolSiC Mosfet dV/dt can be controlled quite well via the gate resistor.
    Compared to IGBTs with Si FWD...
  11. Replies
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    252

    Hi Gyro Gearloose, one main difference is the...

    Hi Gyro Gearloose,

    one main difference is the voltage range, where such devices are available. The main domain of CoolMOS is 650 V, with some parts up to 950 V. Contrary CoolSiC Mosfet can be...
  12. Thread: Body Diode

    by electricuwe
    Replies
    2
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    222

    Hi Melli, for thermal design you should...

    Hi Melli,

    for thermal design you should consider that this body is only conduction during deadtime. Hence the high forward voltage is no big issue. In a typical halfbridge configuration with...
  13. Replies
    2
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    253

    Hi Walter, yes, in general I agree to the...

    Hi Walter,

    yes, in general I agree to the statement above. But you should consider the higher switching speed and doublecheck, if performance of current and voltage probes is still sufficient to...
  14. Replies
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    1,059

    Hi powergeek. beside the explanation already...

    Hi powergeek.

    beside the explanation already given by Yuan, there are two further considerations leading us to the decission of naming the SiC Mosfets according to the Rdson:

    - this is already...
  15. Replies
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    182

    Hi Nick, by using SiC Mosfets in eBus...

    Hi Nick,

    by using SiC Mosfets in eBus auxiliary drives you can provide silent operation without big penalty on losses. A drive based on silicon devices targeting the same noise level needs bigger...
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