100 hp Single Phase DC Reactor, 200A

Q1: How to select DC reactor specifications?

• Rated Current and Voltage: The rated current of the DC link choke must not be lower than the maximum DC bus current of the inverter, and the rated voltage must be higher than the DC bus voltage.
• Inductance/Reactance Ratio: Typically selected based on the inverter's power and allowable DC current ripple, aiming to control the ripple to around 5%-10%, while keeping the voltage drop within an acceptable range.
• Power Rating and Application Environment: For high-power systems or applications requiring stable current, select a larger capacity DC link reactor; in high-temperature or special environments, pay attention to heat dissipation and insulation levels.

Q2: How to select a DC reactor for an inverter?

Confirm the inverter's DC bus voltage and rated power.

• Calculate the required inductance based on the manufacturer's recommended reactance ratio (usually 3%-7%).
• Select a model with a rated current not lower than the inverter's maximum DC bus current.
• Check the reactor's dimensions, heat dissipation, and installation method to ensure compatibility with the inverter cabinet.

In short, it involves looking at voltage, current, and power, and then selecting the inductance value based on the reactance rate to ensure controllable ripple and equipment safety.