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LCR 共振計算器 (串聯與並聯 RLC 回路)

本工具用於計算由電阻 (R)、電感 (L) 和電容 (C) 組成的 LCR 回路（即 RLC 回路）的諧振頻率、諧振時的阻抗與容抗/感抗、品質因數 (Q值)、頻帶寬度 (BW) 以及截止頻率，支援串聯和並聯兩種連接形態。

計算公式

諧振頻率 (f₀): f₀ = 1 2π √LC [Hz]

諧振感抗與容抗 (X₀): X_L = ω₀L, X_C = 1 ω₀C （諧振時 X_L = X_C = X₀）

串聯諧振 Q值與頻寬: Q_s = 1 R √ LC , BW_s = f₀ Q_s

並聯諧振 Q值與頻寬: Q_p = R √ CL , BW_p = f₀ Q_p

關於 LCR 諧振回路

LCR 電路的諧振發生在感抗 ($X_L$) 與容抗 ($X_C$) 大小相等、方向相反並相互抵消的頻率點。
- **串聯諧振回路**在諧振頻率處回路的總阻抗降至最低（等於電阻 R），從而使得流經電路的電流達到最大值。
- **並聯諧振回路**在諧振頻率處回路的總阻抗升至最高，從而使外部輸入回路的總電流降至最低。
品質因數 Q 值（即諧振銳度）越高，諧振曲線越尖銳，對應的通頻帶寬度 (BW) 就越窄。

輸入參數

輸出結果

輸入參數並點擊“計算”以顯示結果。

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電阻 (R):
電感 (L):
電容 (C):