一种可实现单相电机对称运行的变频调速方法  

A method of adjustable frequency control for single-phase motor in symmetrical operation

作　　者：汤宁平[1] 洪长功[1] 林珍[1] 

机构地区：[1]福州大学电气工程系,福建福州350002

出　　处：《福州大学学报（自然科学版）》2003年第2期166-170,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省科技三项资助项目 (K0 2 0 0 6 )

摘　　要：根据单相电机对称运行时的合成电压矢量方程 ,提出了考虑单相电动机主、副绕组对称和不对称两种情况下产生圆形旋转磁场的电压矢量式PWM变频调速控制方法 .该方法在保证两相电压分量相位相差90度的条件下 ,使电压分量大小与绕组匝数成正比 ,然后合成为电压矢量 ,产生PWM变频控制信号 .计算机动态仿真结果表明该方法使单相电机产生圆形旋转磁场 ,实现对称运行是有效的 .样机的试验结果证明了用电压矢量式PWM变频控制方法实现单相电机宽范围调速的可行性 .According to the equation of voltage vector of single-phase motor operating in symmetrical condition, the paper presents a new voltage-vector PWM method of adjustable frequency control for single-phase motor. A rounding magnetic field in the motor can be got with symmetrical or asymmetrical windings of two phases by the method. PWM control signals are generated by a voltage vector composed with two voltages components of the magnitude in proportion to the winding turns and 90o phase displacement. Simulation of dynamic performance of single-phase motor shows that this method is availability for creating rounding magnetic field in single-phase motor. A prototype is made and the experiment results verify the feasibility of wide range of adjustable speed for single-phase motor using voltage-vector PWM frequency control.

关 键 词：对称运行 电压矢量 单相电机 PWM变频调速 工作原理 变频控制 

分 类 号：TM343.1[电气工程—电机]