The resistance of the discharge resistor is either 3,9 kOhm or 39 kOhm depending on which inverter variant is selected (small/large system option, see the datasheet for more information). This discharge resistor is activated automatically to reduce the DC-link voltage when the device is shut off or trips to a hardware fault.
This model extends the “Voltage Source Inverter” demo model by including pre-charging resis-tors connected to the three-phase source. These resistors are used to limit the inrush current during the initial charging of the DC-link capacitor. The inverter is controlled with an outer voltage control loop and an inner current control loop.
Note that the discharge resistor cannot force the DC-link voltage to zero if there is some device actively feeding power into the DC-link, since the maximum dissipation power of the discharge resistor is very limited due to the high resistance.
The EC-C1200 inverter has an internal discharge resistor, highlighted in the schematic below. The resistance of the discharge resistor is either 3,9 kOhm or 39 kOhm depending on which inverter variant is selected (small/large system option, see the datasheet for more information).
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The EC-C1200 inverter has an internal discharge resistor, highlighted in the schematic below. The resistance of the discharge resistor is either 3,9 kOhm or 39 kOhm depending on which …
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