有一三相星形联接对称负载,每相电阻R=40欧感抗XL=30欧,该负载接在电压U=380V的三相电源上求该负载消耗的有功功率和无功功_其他解答

有一三相星形联接对称负载,每相电阻R=40欧感抗XL=30欧,该负载接在电压U=380V的三相电源上
求该负载消耗的有功功率和无功功率,视在功率各相电流和线电流

人气：227 ℃　时间：2019-10-10 08:02:23

解答

Z = √(40^2+30^2) = 50 Ωcosθ = 40 / 50 = 0.8 Ix = 380 / 50 = 7.6 AIL = √3 * Ix = 13.16 AS = 3 * Ux * Ix = 3 * 380 * 7.6 = 8664 VAP = S * cosθ = 8664 * 0.8 = 6931.2 WQ = S * sinθ = 8664 * 0.6 = 51...