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Raspberry Pi 4: 这是设备的耗电量 - Practical Tips

Raspberry Pi 4: 这是设备的耗电量

by Mike

对于Raspberry Pi 4的功耗,很难给出一个大致的数字。与其他任何计算机一样,这取决于Raspberry Pi在任何时候要执行哪些操作。功率要求也是由这个决定的。

树莓派4的功率消耗

Raspberry Pi 4的电源要求通常只限于几瓦特。

  • 一般来说,Raspberry Pi 4的供电电压为5.1伏。这意味着,在功率为10瓦的情况下,将有不到2安培的流量。你可以用熟悉的公式P = U * I.来计算。
  • 当启动过程完成后,你的操作系统–例如Raspian–处于激活状态,并且你已经连接了一个显示器,Raspberry Pi 4需要大约2.5瓦,也就是大约半个安培。
  • 当你现在打开浏览器并开始冲浪时,功率需求略有增加,但并不明显,大约为4.5瓦。即使在树莓派4的所有四个核心都100%激活的测试中,电力需求也没有上升到1安培以上,也就是大约5瓦。
  • 一般来说,你连接到Raspberry Pi上的硬件越多,电源需求就越高。另外,对GPU的需求和对RAM的内存访问增加也推动了功耗的增加。Raspberry Pi 4的官方电源提供的最大电流为3安培,对应的功耗为15瓦。然而,这是一个相对较大的数量,所以这个电源应该是绰绰有余的。
  • 与Raspberry Pi 3相比,第四代产品的功耗有所增加。对于空闲模式下的活动操作系统和中等程度的局域网连接,大约需要1.8瓦的功率。因此,这比Raspberry Pi 4的功耗低约0.7瓦。 然而,这也会随着WLAN或其他外设的使用而发生巨大的变化。

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