一种高精度高隔离脉宽调制解调电路设计

摘要

为满足机车牵引系统、强磁场线圈等的高压高隔离监测要求，提出一种新颖的电磁隔离脉宽调制解调电路设计方案。从工作原理、数学推导、软件仿真及工程实测等方面对电路的功能、性能与可靠性进行了论述。结果表明：该电路能有效地解决高压隔离监测场合的各种问题，具有高精度、高隔离、高响应、低功耗等特点，运行稳定可靠。%To cope with the demands of monitoring under high voltage and high isolation cases for traction systems of electric trains and intense magnetic field coils, a new pulse width modulation and demodulation circuitry with electromagnetic isolation is proposed. The function, performance and reliability of the circuit are discussed from the aspects of working principle, mathematical deduction, software simulation and engineering test. Application results show that, the circuit can effectively solve the problems of monitoring in cases of high voltage and high isolation, with advantages of high precision, high isolation, high response, low power consumption, stable and reliable.