【作者】 孙俊；

【导师】 韩雁；

【作者基本信息】 浙江大学 ， 电子科学与技术， 2015， 硕士

【摘要】 整流电路作为电力电子技术中最基本的变流电路,在直流电机调速、电解电镀、中频感应加热等领域具有广泛的应用。其中,三相桥式全控整流电路输出直流电压脉动小、易滤波,因而应用最为广泛。控制电路,作为整流电路的核心部件,也称为触发电路,用于实现整流输出电压的相位控制,其稳定性和可靠性直接影响整流电路的性能。本文对三相桥式全控整流电路的工作原理进行了深入的分析,在了解用户实际需求的基础上,设计出了一款三相晶闸管整流控制电路专用芯片,旨在解决目前市场上现有整流控制电路普遍存在的一致性差、抗干扰能力弱、调试和维护困难等问题。论文在实现整流控制芯片基本功能的基础上,着重加强了工业界特别关注的稳定性与可靠性方面的设计。本文的主要工作和创新点包括：1、详细分析了三相桥式全控整流电路的工作原理,根据整流电路对触发脉冲的基本要求,提出了触发电路的系统解决方案。2、提出了一种新颖的数字去抖动方案。实际工业应用环境中普遍存在各种干扰和噪声,使用迟滞比较器虽然可以有效去除噪声,但同时会带来相位延迟问题。本论文提出的数字去抖动方案,在可靠去除噪声的同时,保证了触发的精度。3、提出了一种振荡器片上自修调技术。芯片中的压控振荡器的压控特性是芯片移相控制特性的决定因素,但是受CMOS集成电路制造过程中各种工艺涨落因素的影响,片上集成振荡器输出频率的一致性比较差。针对这一问题,本论文利用电网频率进行芯片的片上自修调,有效解决了压控振荡器输出频率离散问题,同时压控振荡器的温度特性也得到了改善。4、采用CSMC0.5-μm标准CMOS工艺实现了整流控制芯片。在Cadence软件环境下,完成了各个子模块电路的设计与仿真。芯片已通过MPW(多项目晶圆)流片成功。测试结果表明,该芯片完全达到了预期设计目标。更多还原

【Abstract】 As the basic converter circuit in power electronics technology, rectifier circuit is widely used in the fields of DC-motor speed control, electrolytic plating, medium frequency induction heating, etc. With the advantages of small voltage ripple and easy to filter, the three-phase full-controlled bridge rectifier circuit gains the most popularity. As the core component of the rectifier circuit, the control circuit, also known as the trigger circuit, is used to control rectifier’s output voltage by phase. Its stability and reliability will directly affect the performance of the rectifier circuit.This thesis analyzed the operating principle of the three-phase full-controlled bridge rectifier circuit in depth and designed an ASIC for three-phase thyristor rectifier’s control according to the users’actual requirement, aimed at resolving problems like sensitivity to process fluctuation, weak anti-interference ability and difficulty in debugging and maintenance, which commonly exist in the available trigger circuits in the market. This thesis focused on the stability and reliability of the circuit while realized the basic function of the trigger circuit. The main work and innovation include:1. The operating principle of the three-phase full-controlled bridge rectifier circuit was analyzed in detail and a system solution for trigger circuit was proposed according to the requirement of the rectifier circuit.2. A novel digital de-jitter solution was presented. All kinds of interference and noise are widespread in practical industry applications. The employment of hysteresis comparator in conventional ways can eliminate noise effectively but will introduce phase delay simultaneously. The proposed digital de-jitter solution can not only remove noise reliably but also guarantee the precision of the phase shift.3. A self-calibration technique for on-chip precise clock generator was proposed. The voltage-controlled oscillator is the determinant of the characteristic of the chip’s phase shift control, however, the on-chip oscillator was sensitive to the CMOS fabrication process fluctuation. Concerning this issue, the operating frequency of the power grid is employed as the frequency reference to eliminate the frequency variation in this technique, which solved the output frequency variation of the voltage controlled oscillator effectively. Moreover, this technique also improved the temperature stability of the oscillator.4. The rectifier control chip was implemented in CSMC0.5-μm CMOS process. The entire system including the main circuits and the sub circuits is designed and simulated by Cadence. The chip was successfully taped out by MPW, test results show that the desired goals have been achieved.更多还原