知搜-全球专利检索

  1. 登录
  2. 注册
发明公开
CN105990819A 低压变频器的直流电压检测与保护电路 有权

低压变频器的直流电压检测与保护电路
摘要：
本发明公开了一种低压变频器的直流电压检测与保护电路，包括控制电压回路、主回路有电指示回路、参与变频器调速控制用直流电压检测回路、直流电压保护回路；控制电压回路由两个回路供电，一路为单相交流电压通过桥式整流桥D1整流后输出直流电压；另一路由变频器主回路直流电压P、N给直流电源转换器DC/DC-1供电；变频器主回路直流电压P、N经过熔断器FUSE0后变成P0、N分别去三个回路：一路去主回路有电指示回路，第二路去参与变频器调速控制用直流电压检测回路，第三路去直流电压保护回路。本发明将参与变频器调速控制用直流电压检测回路与直流电压保护回路分开，提高了直流电压保护可靠性，也提高了直流电压检测精度和线性度。
摘要（英）：

A DC voltage detection and protection circuit of a low-voltage frequency converter, disclosed by the present invention, comprises a control voltage loop, a main loop electrification indication loop, a DC voltage detection loop used for participating in the speed regulation and control of the frequency converter and a DC voltage protection loop. The control voltage loop is powered by two loops, with one loop being characterized in that a single-phase AC voltage is rectified by a bridge rectifier D1 and then outputs a DC voltage, and the other loop being characterized in that the frequency converter main loop DC voltages P and N supply power to a DC power supply converter DC/DC-1. The frequency converter main loop DC voltages P and N become the voltages P0 and N after passing a fuse FUSE0 and are supplied to three loops of the main loop electrification indication loop, the DC voltage detection loop used for participating in the speed regulation and control of the frequency converter and the DC voltage protection loop. According to the present invention, the DC voltage detection loop used for participating in the speed regulation and control of the frequency converter and the DC voltage protection loop are separated, thereby improving the DC voltage protection reliability and the DC voltage detection precision and linearity.

公开/授权文献
0/0