使用随机 SVPWM 塑造 PMSM 噪声频谱的选择性噪声抑制方法
Selective Noise Suppression Methods Using Random SVPWM to Shape the Noise Spectrum of PMSMs
AI总结：
针对交流电机随机脉宽调制引起的振动和声学噪声问题，提出两种选择性噪声抑制方法，通过随机化开关频率和脉冲位置塑造噪声频谱，有效消除指定频率电压谐波，为电机共振频率下的电磁和声学噪声消除提供参考。
摘要：
随机脉宽调制技术用于由两电平三相逆变器供电的交流电机，产生电压、电流和电磁力的宽带频谱。宽频范围内的电压分布可能增加电机的振动和声学噪声。本研究提出两种选择性噪声抑制（SNS）方法，以消除指定频率的电压谐波。第一种方法中，开关频率恒定，脉冲位置由当前开关周期的占空比计算。第二种方法同时随机化脉冲位置和开关频率，通过在开关频率、脉冲位置和占空比之间建立独特关系来塑造噪声频谱。计算机仿真和实验结果表明，两种方法均能在特定频率有效执行选择性噪声抑制。使用第二种 SNS 方法的功率谱密度（PSD）在开关频率的整数倍附近比使用随机脉宽调制技术或第一种 SNS 方法更为均匀。这些方法为消除电机共振频率下的电磁和声学噪声提供了有价值的参考。
英文摘要：
Random pulse width modulation techniques are used in AC motors powered by two-level three-phase inverters, which cause a broadband spectrum of voltage, current, and electromagnetic force. The voltage distribution across a wide range of frequencies may increase the vibration and acoustic noise of motors. This study proposes two selective noise suppression (SNS) methods to eliminate voltage harmonics for specified frequencies. In the first method, the switching frequency is constant. The pulse position is calculated by the duty cycle of the current switching cycle. Both the pulse position and switching frequency are randomized in the second method. This involves creating a unique relationship among the switching frequency, pulse position, and duty cycle to shape the noise spectrum. Computer simulation and experimental results show that both methods effectively perform selective noise suppression at a specific frequency. The power spectrum density (PSD) using the second SNS method is more uniform near integer multiples of the switching frequency than that using random pulse width modulation techniques or the first SNS method. These methods provide a valuable reference for eliminating electromagnetic and acoustic noises at resonant frequencies in motors.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
