ZHCUD04A May 2025 – October 2026
4.4.1 效率和 iTHD
以下部分重点介绍了在并网和离网运行两种情况下的效率以及总谐波失真 (iTHD) 性能。通常，转换器在直流/交流和交流/直流两种模式下工作。对于离网，转换器在直流转交流模式下运行。请注意，x 轴显示了满量程 (FS) 输出功率的负载百分比。对于较低的输入 VDC 电压，例如 33V，FS 输出功率从 600W 降低到 400W。
图 4-6 直流/交流并网效率表 4-1 直流/交流并网效率
| 功率，%FS | 42V 600W | 48V 600W | 33V 400W |
|---|---|---|---|
| 5% | 79.3% | 75.3% | 63.2% |
| 10% | 89.3% | 86.4% | 78.4% |
| 20% | 95.5% | 93.2% | 88.6% |
| 30% | 96.6% | 95.8% | 94.0% |
| 50% | 97.6% | 97.3% | 96.0% |
| 75% | 97.6% | 97.6% | 96.4% |
| 100.0% | 97.0% | 97.2% | 96.6% |
| Euro Eff | 96.1% | 95.3% | 92.9% |
| CEC Eff | 97.0% | 96.6% | 94.9% |
图 4-7 交流/直流并网效率表 4-2 交流/直流并网效率
| 功率，%FS | 48V 600W | 40V 600W | 35V 400W |
|---|---|---|---|
| 5% | 73.7% | 78.4% | 70.1% |
| 10% | 84.6% | 88.2% | 82.6% |
| 20% | 91.8% | 93.8% | 90.7% |
| 30% | 94.2% | 95.6% | 93.6% |
| 50% | 96.0% | 96.7% | 95.7% |
| 75% | 96.5% | 96.8% | 96.3% |
| 100.0% | 96.5% | 96.4% | 96.5% |
| Euro Eff | 94.0% | 95.1% | 93.4% |
| CEC Eff | 95.4% | 96.1% | 95.0% |
图 4-8 直流/交流离网效率表 4-3 直流/交流离网效率
| 功率，%FS | 42V 600W | 48V 600W | 33V 400W |
|---|---|---|---|
| 5% | 58.3% | 57.7% | 46.1% |
| 10% | 73.8% | 73.4% | 63.5% |
| 20% | 85.0% | 84.9% | 78.0% |
| 30% | 91.6% | 90.5% | 86.2% |
| 50% | 96.0% | 94.7% | 94.1% |
| 75% | 97.1% | 96.7% | 96.0% |
| 100.0% | 96.9% | 97.0% | 96.0% |
| Euro Eff | 91.8% | 91.1% | 88.3% |
| CEC Eff | 94.7% | 94.0% | 92.2% |
图 4-9 直流/交流并网 iTHD表 4-4 直流/交流并网 iTHD
| 功率，%FS | 42V 600W | 48V 600W | 33V 400W |
|---|---|---|---|
| 5% | 64.7% | 69.3% | 64.1% |
| 10% | 45.7% | 49.8% | 51.0% |
| 20% | 32.4% | 19.9% | 34.5% |
| 30% | 20.9% | 17.0% | 20.2% |
| 50% | 10.9% | 10.0% | 18.0% |
| 75% | 5.1% | 4.8% | 14.6% |
| 100.0% | 2.9% | 2.6% | 7.8% |
图 4-10 交流/直流并网 iTHD表 4-5 交流/直流并网 iTHD
| 功率，%FS | 48V 600W | 40V 600W | 35V 400W |
|---|---|---|---|
| 5% | 41.4% | 52.0% | 58.2% |
| 10% | 26.9% | 37.3% | 46.5% |
| 20% | 15.6% | 22.3% | 30.5% |
| 30% | 11.0% | 16.2% | 21.6% |
| 50% | 7.1% | 9.6% | 13.8% |
| 75% | 5.2% | 5.5% | 8.9% |
| 100.0% | 3.8% | 3.5% | 6.1% |
图 4-11 直流/交流离网 iTHD表 4-6 直流/交流离网 iTHD
| 功率，%FS | 42V 600W | 48V 600W | 33V 400W |
|---|---|---|---|
| 5% | 0.8% | 0.9% | 0.8% |
| 10% | 0.8% | 0.9% | 0.7% |
| 20% | 0.9% | 1.0% | 0.8% |
| 30% | 1.4% | 1.1% | 1.0% |
| 50% | 1.8% | 2.0% | 1.4% |
| 75% | 1.4% | 1.6% | 1.2% |
| 100.0% | 1.1% | 1.3% | 1.1% |