+ Reducing current ripple → DC link choke reduce harmonics and limit peak current
+ Helps absorb voltage spikes on DC bus
Description
How it behaves
- These chokes are often placed on the DC link of converter/inverter or boost PFC circuits in order to prevent voltage spikes on the DC bus. The inductor will not allow large voltage fluctuations, because it limits the current rise.
What do Storage & DC Link Chokes aim to solve
- Low-pass filter → attenuates high frequencies on top of a DC output
| Voltage (RMS/peak) | 800V / 900V |
| Current (RMS/peak) | 50A / 100A |
| Current Ripple * | 2A |
| Maximum Power ** | 20kW |
| DC Resistance | ~20mΩ |
| Inductance | < 1 mH |
| Q Factor *** | < 10 |
| Frequency | < 60Hz |
* Higher frequency → lower current ripple
** Power range can be extended when necessary
*** Depends on working frequency range
- DC bus/link inverters ripple suppression
- Boost PFC DC links
- LC filter DC link
- Pi filters at DC output
- Variable frequency drives
Frequently asked questions
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