What is Desat fault?
A desaturation fault detection circuit provides protection for power semiconductor switches (IGBT or MOSFETs) against short-circuit current events which may lead to destruction of these power switches.
What is desaturation IGBT?
IGBT desaturation means the C-E voltage of the IGBT rises (usually by too high a collector current). When the IGBT is turned on, its collector voltage is in the 2.. 3V ballpark. D_Desat pulls Pin 14 of the driver down to that voltage plus one diode drop.
What is Desat in the gate driver?
The VCE(sat) detection (DESAT detection) circuit which detects the rise of the collector or drain voltage (VCE) when an over-current flows into the power semiconductor switch device (hereinafter referred to ‘power device’) driven by the gate driver by causes, such as a short circuit of load, makes the power device turn …
What is the function of IGBT in AC drive?
The IGBT combines an isolated-gate FET for the control input and a bipolar power transistor as a switch in a single device. The IGBT is used in medium to high-power applications like switched-mode power supplies, traction motor control and induction heating.
What does 60% oxygen mean?
Values under 60 mm Hg usually indicate the need for supplemental oxygen. Normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low.
What can cause an IGBT to fail?
The failure modes for the IGBT are in the form of degradation of certain key electrical parameters (e.g., leakage current, threshold voltage) or the loss of functionality (inability to turn-off). The failure causes can be due to environmental conditions or operating conditions.
What is the main function of IGBT?
The most basic function of an IGBT is the fastest possible switching of electric currents, thus achieving the lowest possible switching losses. As the name “Insulated Gate Bipolar Transistor” reveals, an IGBT is a bipolar transistor with an isolated gate structure; the gate itself is basically a MOSFET.
How do I turn off IGBT?
One of the main advantages of the IGBT transistor is the simplicity by which it can be driven “ON” by applying a positive gate voltage, or switched “OFF” by making the gate signal zero or slightly negative allowing it to be used in a variety of switching applications.
What does it mean when a patient desaturated?
de·sat·u·ra·tion. (dē’sat-yū-rā’shŭn), 1. The act, or the result of the act, of making something less completely saturated; more specifically, the percentage of total binding sites remaining unfilled; for example, when hemoglobin is 70% saturated with oxygen and nothing else, its desaturation is 30%.