Converter output reactor selection calculation problem - Database & Sql Blog Articles

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1. Impedance Voltage Drop: The impedance voltage drop refers to the actual voltage drop across the reactor coil at a specific frequency (XHz) under the rated current. This parameter is typically set between 1% and 4%, depending on the application requirements and system design. A well-chosen impedance voltage drop ensures stable performance and efficient energy transfer. 2. Inductance Selection: The rated inductance of the reactor is a crucial factor that directly affects its performance. If the inductance is not properly chosen, it can lead to improper voltage drop under the rated current, potentially causing system failures or malfunctions. The inductance value is influenced by several factors, including the cross-sectional area of the core, the number of turns in the coil, and the air gap adjustment. These parameters must be carefully balanced to achieve optimal operation. 3. Inductance and Cable Length Correlation: When selecting the inductance for an output reactor, the length of the cable within the rated frequency range plays a significant role. Longer cables may require higher inductance values to counteract voltage spikes and reduce harmonic distortion. Once the inductance is determined based on the cable length, the core cross-section and conductor size are selected according to the motor's actual rated current. This ensures that the voltage drop remains within acceptable limits and the system operates efficiently. 4. Rated AC Current Selection: The rated AC current of the reactor is designed with thermal considerations in mind, meaning it should be able to handle long-term continuous operation without overheating. It’s important to account for high-order harmonic components that may be present in the current flow. In practical applications, the current passing through the output reactor is essentially the output current from the inverter, which drives the motor load. Therefore, the rated current must be chosen carefully to ensure reliable and safe operation over time.