利索-全球专利检索

  1. 登录
  2. 注册
实用新型
CN203224553U 采样积分式钳形交流有功电流表 失效 - 权利终止

采样积分式钳形交流有功电流表
摘要：
本实用新型公开了一种采样积分式钳形交流有功电流表，解决了大多数现有电流表无法测出交流电路中有功电流的问题。包括电流互感器（2）、采样开关（4）、积分放大器（5）和过零比较器（12），采样开关（4）的输入端与电流互感器（2）的二次侧的极性输出端连接，被测交流电路的电源端（9）与第一分压电阻（10）的一端连接，第一分压电阻（10）的另一端与过零比较器（12）的输入端连接，过零比较器（12）的输出端与采样开关（4）的控制端连接，采样开关（4）的输出端与积分放大器（5）的输入端连接，积分放大器（5）的输出端与数显表头（8）的输入端连接。本实用新型结构简单，成本低，测量方便，精度高。
摘要（英）：

The utility model discloses a sampling integral jaw-shaped AC active current meter, and solves the problem that active current in an AC circuit cannot be detected by most conventional current meters. The AC active current meter comprises a current transformer (2), a sampling switch (4), an integral amplifier (5), and a zero-crossing comparator (12). The input terminal of the sampling switch (4) is connected to a polarity output terminal of a secondary side of the current transformer (2). A power supply terminal (9) of a tested AC circuit is connected to one terminal of a first divider resistor (10). The other terminal of the first divider resistor (10) is connected to the input terminal of the zero-crossing comparator (12). The output terminal of the zero-crossing comparator (12) is connected to the control terminal of the sampling switch (4). The output terminal of the sampling switch (4) is connected to the input terminal of the integral amplifier (5). The output terminal of the integral amplifier (5) is connected to the input terminal of a digital display meter head (8). The sampling integral jaw-shape AC active-current meter has the advantages of simple structure, low cost, convenience in measurement and high precision.

0/0