Technical FAQs 4

What is a discharge resistor?

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.

How to improve the performance of a drive inverter?

Drive inverter integration: Strategic positioning can reduce thermal stress and increase performance. Optimized discharge strategies, such as constant-power discharge, further reduce the size of the discharge resistor. Quality Control: Various tests under realistic operating conditions guarantee the reliability and safety of the components.

Does the ec-c1200 inverter have a discharge resistor?

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).

Can a discharge resistor force a DC-link voltage to zero?

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.

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