基于重复窄短路脉冲与高阶锁相的永磁同步电机带速重投策略  

Restart Strategyof Permanent Magnet Synchronous MotorBased on Repetitive Narrow Short-Circuit Pulses and High-Order Phase-Locked Loop

作　　者：吴春 康李佳 郑露华 吴辰浩 Wu Chun;Kang Lijia;Zheng Luhua;Wu Chenhao(CollegeofInformationEngineering Zhejiang University of Technology,Hangzhou 310023 China)

机构地区：[1]浙江工业大学信息工程学院,杭州310023

出　　处：《电工技术学报》2024年第S1期64-76,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52007169);浙江省自然科学基金(LY23E070004)资助项目。

摘　　要：针对永磁同步电机传统双脉冲和多脉冲注入带速重投方法在位置、转速估计方面存在稳态精度低、转速跟踪慢等问题,提出一种重复窄短路脉冲与高阶锁相的带速重投策略。通过提高带速重投过程的脉冲宽度调制(PWM)频率,实现更窄的短路脉冲输出,更准确地控制电流幅值。为了解决传统固定脉冲宽度带来的高速电流纹波大的问题,根据两个测试短路脉冲的电流幅值信息自适应调整短路脉冲宽度和时间间隔,保证全速范围的短路脉冲幅值小且受控。同时为了提高电流采样信噪比,采用电流过采样技术,多次采集相电流后求平均值,进一步提升位置估计精度。并设计三阶锁相环实现短路电流快速准确锁相,实现转子位置和转速的连续估计。实验结果表明,所提出策略在全速范围将电流幅值控制在额定电流的5%以内,减小电流纹波,降低母线电压泵升速率,提高位置和转速估计精度,从而实现快速、无电流冲击的带速重投。In some applications with large momentof inertia,permanent magnet synchronous motor(PMSM)drive systemsarealways required to be capable of a rapid startup when the power source is shut downand then is turned on againduring a short time,such as tens of milliseconds.In recent years,scholars have put forward several methods for fast restarting of PMSM drives.However,these methods have not fully consideredthe rapidity of the restarting process,direct current-bus(dc-bus)voltage pumping up and inrush current influences comprehensively.To address these issues,this article proposes a restart strategy based on repetitive narrow short-circuit pulses and a high-order phase-locked loop(PLL).In the restarting process,the small current magnitude can be controlled by increasing the frequency of the pulse-width modulation(PWM),which can reduce the short-circuit voltage pulse action time and decrease the pumping rate of dc-bus voltage.In addition,the high-order PLLreduces the tracking error of position and speed estimation during acceleration and deceleration processes.First,the increase in the PWM frequency generates narrower short-circuit voltage pulses and smaller current amplitude.Second,by settinga current reference and usingtwo test voltage pulses,the period and the interval of the short-circuit voltage pulsescan be adjusted,which can solve the problem of large current ripple due to the traditional fixed voltage pulsesat highspeeds,and realize that the induced current ripple amplitude is small and controllable in full-speed operations.Third,thethird-order PLL is designed to facilitate a rapid and accurateposition tracking,as well as continuous estimation of position and speed.Fourth,a current oversampling method is adopted to average phase currents,thereby improving the signal-to-noise ratio of current sampling and the accuracy of position estimation.The experimental results demonstrate that at 2400 r/min,the pumping dc-bus voltagesof the conventional double-pulse and the multi-pulse methods within 2.4 ms are 22 V and 7 V,re

关 键 词：永磁同步电机 重投策略 重复窄脉冲 电流过采样 三阶锁相环 

分 类 号：TM351[电气工程—电机]