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公开(公告)号：US5021700A
公开(公告)日：1991-06-04
申请号：US410035
申请日：1989-09-21
摘要： A driving apparatus for an ultrasonic motor which generates a driving force by using a piezoelectric member, wherein an oscillation frequency fd is varied so as to follow a driving frequency fm which is particular to a mechanical resonance frequency fro when the mechanical resonance frequency fro varies by influence of environment. For this purpose, current and voltage detectors are provided for respectively detecting the current corresponding to the mechanical vibration of the piezoelectric member and the voltage impressed on the piezoelectric member. The phase difference between the detected current and voltage is detected, and this phase difference is used to drive a variable frequency oscillator so as to maintain the phase difference constant. The output of the variable frequency oscillator is then used to drive the driving circuit for the piezoelectric member of the ultrasonic motor.
摘要翻译： 一种用于通过使用压电元件产生驱动力的超声波马达的驱动装置，其中振荡频率fd变化，以便遵循当机械共振频率变化时的机械共振频率特定的驱动频率fm 环境影响。 为此，提供电流和电压检测器，用于分别检测与压电元件的机械振动相对应的电流和压在压电元件上的电压。 检测检测到的电流和电压之间的相位差，并且该相位差用于驱动可变频率振荡器，以保持相位差恒定。 然后，可变频率振荡器的输出用于驱动超声波马达的压电元件的驱动电路。
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公开(公告)号：US4853578A
公开(公告)日：1989-08-01
申请号：US141036
申请日：1988-01-05
摘要： In a driving circuit for a piezoelectric ultrasonic motor (23) supplying driving signal from an astable oscillator (51), which comprises an oscillation IC (49), a capacitor (48) and charge-discharge resistors (45, 46, 47), is controlled by controlling leakage current through a leakage resistor (47) to a point E, through controlling of the voltage of the point E by a temperature-dependent voltage producing circuit 52.
摘要翻译： 在由包括振荡IC（49），电容器（48）和充放电电阻（45,46,47）的异常振荡器（51）提供驱动信号的压电超声波马达（23）的驱动电路中， 通过控制通过温度相关的电压产生电路52的点E的电压，通过泄漏电阻器（47）将泄漏电流控制到点E来控制。
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公开(公告)号：US4833359A
公开(公告)日：1989-05-23
申请号：US143093
申请日：1988-01-12
摘要： In a driving apparatus for an ultrasonic motor, which motor has a stator comprising a pair of piezoelectric members for generating travelling mechanical vibrations, the driving apparatus has an oscillator, a phase shift circuit, and delay circuits. By deferring phases of two control signals for two switching devices, there is no fear of dangerous simultaneous turn-ons of the switching devices.
摘要翻译： 在一种用于超声波电动机的驱动装置中，该电动机具有包括用于产生行进机械振动的一对压电元件的定子，该驱动装置具有振荡器，相移电路和延迟电路。 通过推迟两个开关装置的两个控制信号的相位，不必担心开关装置的同时导通。
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公开(公告)号：US20100047645A1
公开(公告)日：2010-02-25
申请号：US12529146
申请日：2008-12-18
CPC分类号： H01M8/04373 , F24D11/005 , F24D12/02 , F24D17/001 , F24D19/1015 , F24D19/1021 , F24D19/1024 , F24D2200/16 , F24D2200/19 , F24D2200/24 , H01M8/04597 , H01M2250/405 , Y02B30/14 , Y02B30/18 , Y02B90/16 , Y02E60/50
摘要： A cogeneration system (100) is provided which has an inverter cooling configuration that enables effective utilization of energy and contributes to an improvement in energy saving performance. To this end, the cogeneration system has a power generator (1); an electric power converter (3); a heat medium path (2) configured to flow a heat medium therein so as to recover exhaust heat from the electric power converter through its cooler (4) and so as to recover exhaust heat from the power generator; a bypass path (8) configured to flow the heat medium, bypassing the cooler; a switch (7); and a controller (12). The controller controls the switch so as to switch the destination of the heat medium from the heat medium path to the bypass path, in a start-up operation or shut-down operation of the cogeneration system, or if the amount of exhaust heat of the electric power converter is smaller than a predetermined exhaust heat amount threshold value.
摘要翻译： 提供一种具有能够有效利用能量并有助于提高节能性能的逆变器冷却结构的热电联产系统（100）。 为此，热电联产系统具有发电机（1）; 电力转换器（3）; 热介质路径（2），其构造为使热介质流过其中，以通过其冷却器（4）从所述电力转换器回收排气热量，以便从所述发电机回收废热; 旁路路径（8），其构造成绕过所述冷却器流动所述热介质; 开关（7）; 和控制器（12）。 控制器控制开关，以便在热电联产系统的启动操作或关闭操作中将热介质的目的地从热介质路径切换到旁通路径，或者如果热源的排热量 电力转换器小于预定的排气热量阈值。
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