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发明授权
CN101071995B 双驱动足纵振模态叠加式直线型超声电机及工作模态和电激励方式 失效 - 权利终止 转让

双驱动足纵振模态叠加式直线型超声电机及工作模态和电激励方式
摘要：
一种双驱动足纵振模态叠加式直线型超声电机及工作模态和电激励方式，属超声电机。该电机的定子由两个相同压电振子对称联接而成，压电振子包括后端盖(11)、前端盖(41)、中间块(21)和压电陶瓷(31)。两个压电振子在有两个驱动足(42)的前端盖上对称联接成一体。该电机的动子为滑条(61)，在滑条表面上还粘接摩擦层(51)。工作模态是，定子两个压电振子做互为反相的纵向振动时，激发定子的反对称振动模态；压电振子做同相的纵向振动时，激发定子的对称振动模态；采用两个相位差为π/2的正弦信号同时激励定子两个压电振子，激发定子两个同频相位差π/2的振动模态，使定子上驱动足质点做椭圆运动推动动子连续直线运动。该直线超声电机可输出大力矩、高速度、高效率的直线运动。
摘要（英）：

Stator of motor is composed of two identical piezoelectric vibrators (PV) connected symmetrically. PV includes back end-cover, front end-cover, intermediate block, and piezoelectric ceramics. Two PVs are connected symmetrically on the front end-cover, where there are two drive feet. Movers of the motor are slide bars with friction layer on surface. Working states include modes: when two PVs do longitudinal vibrations (LV) inverted each other, anti symmetrical vibration (SV) mode of the stator is excitated; when two PVs of the stator do in phase LV, SV mode is excitated. Using two sinusoid signals with phase difference (PD) as pi /2 excites two PVs of stator simultaneously so as to excite mode of vibration of stator in co-frequency with PD as pi /2. Thus, the up drive foot of the stator drives particle of the drive foot to do elliptic motion so as to drive movers to do rectilinear motion (RM) continuously. Advantages are: outputting RM in large moment, high speed and high efficiency.

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