摘要
采用传统晶闸管相控电源供电的电除尘器存在能耗高、效率低等问题,文章设计了一种可以解决这些问题的电除尘器用高压脉冲电源,该电源主电路主要由移相全桥逆变电路和10组相对独立的脉冲输出单元构成。采用移相全桥ZVT-PWM软开关技术控制逆变电路前后桥臂的相位差;采用同步驱动技术驱动各脉冲输出单元,使各输出脉冲叠加后获得高压脉冲;DSP准确控制电源输出高压脉冲的电压、频率和脉宽。结果表明高压脉冲电源提高了电除尘器的除尘效率,减少了对电网的干扰和电能损耗,能满足多种电除尘的要求。
Electrostatic precipitators with traditional thyristor phase-controlled power supplies have the problems of low efficiency and high energy consumption. This paper introduces a high-voltage pulse power supply to solve these problems. This power supply mainly consists of phase-shifted full-bridge inverter circuit and ten relatively independent pulse units. The phase-shifted full-bridge ZVT-PWM soft-switching technology is adopted to regulate the phase difference of driving signals between two bridges. With synchronous drive technology, the high-voltage pulse is generated by superimposing ten independent pulse voltages. The pulse voltage, frequency and pulse width are exactly controlled by DSP. Results show that the high-voltage pulse power supply can improve the efficiency of electrostatic precipitators, reduce power loss and interference on power grid, and meet the needs of electric precipitation under different conditions.
出处
《电测与仪表》
北大核心
2014年第6期81-84,100,共5页
Electrical Measurement & Instrumentation
关键词
电除尘器
同步驱动
脉冲叠加
ZVT-PWM
DSP
electrostatic precipitators
ZVT-PWM
synchronous drive
pulse superimposition
DSP