公开(公告)号：US6126138A

公开(公告)日：2000-10-03

申请号：US222955

申请日：1998-12-30

申请人： Shan-Chin Tsai

发明人： Shan-Chin Tsai

IPC分类号： F16H61/662 ,  F16H59/00 ,  B60K41/12 ,  F16K31/12

CPC分类号： F16H61/66272 ,  Y10T477/624

摘要： A pressure reducing valve and a continuously variable transmission comprising an output pressure feedback loop operatively connected to provide proportional control of an output pressure of a flow of fluid passing through the pressure reducing valve in response to an input signal applied to a pilot stage control valve of the pressure reducing valve from an external source. The pressure reducing valve includes a main stage two-way spool valve having a valve body and a valve spool movable within the valve body in response to an imbalance of forces on the valve spool. The valve body has a supply port for receiving pressurized fluid from a source of constant hydraulic pressure and a load port for communicating a load pressure and flow from the spool valve to an actuator of the secondary pulley of the transmission to maintain transmission belt tension while preventing or minimizing belt slippage. The open area of the load port is dependent on the position of the valve spool within the valve body.

摘要翻译： 一种减压阀和无级变速器，包括输出压力反馈回路，其可操作地连接以响应于施加到先导级控制阀的输入信号来提供通过减压阀的流体流的输出压力的比例控制 来自外部源的减压阀。 减压阀包括主级双向滑阀，其具有阀体和可在阀体内可响应于阀芯上的力不平衡的阀芯。 阀体具有用于从恒定液压源接收加压流体的供给口和负载端口，用于将负载压力和流量从滑阀传递到变速器的次级带轮的致动器，以保持传动带张力同时防止 或最小化皮带打滑。 负载端口的开放区域取决于阀芯在阀体内的位置。

公开(公告)号：US4458318A

公开(公告)日：1984-07-03

申请号：US257036

申请日：1981-04-24

申请人： Geoffrey N. Smit ,  Scott R. Anderson ,  Shan-Chin Tsai

发明人： Geoffrey N. Smit ,  Scott R. Anderson ,  Shan-Chin Tsai

IPC分类号： F16H9/18 ,  B60W30/18 ,  F16H9/00 ,  F16H37/02 ,  F16H61/00 ,  F16H61/66 ,  F16H61/662 ,  F16H63/02 ,  F16H63/06 ,  F16H63/46 ,  F16H11/06 ,  F16H55/54 ,  G05D17/02

CPC分类号： B60W30/18 ,  B60W10/02 ,  B60W10/04 ,  B60W10/10 ,  B60W10/101 ,  B60W30/1819 ,  F16H61/66 ,  F16H61/66259 ,  B60W2710/1005 ,  Y10T477/624 ,  Y10T477/62427

摘要： A continuously variable transmission (CVT) with adjustable width pulleys has its belt tension and ratio controlled by an electronic-hydraulic system. The CVT also has a fluid-cooled clutch on the output pulley shaft. The engine speed, transmission output speed, throttle position, and gearshift position are sensed, and signals representing this information are passed to a computer. The computer provides set point signals denoting desired engine speed, line pressure, and clutch cooling condition to a control system. An electromechanical valve assembly regulates fluid flow to the CVT primary sheave, to control CVT ratio as a function of the computer provided set engine speed signal. A second electromechanical valve assembly controls the line pressure in the hydraulic system, which is applied to the secondary pulley to maintain belt tension, as a function of the set pressure signal provided by the computer. A solenoid-operated valve, regulated by the control system, either returns waste fluid from the second valve assembly directly to sump, or passes the fluid to the clutch when cooling is indicated.

摘要翻译： 具有可调节宽度滑轮的无级变速器（CVT）具有由电子液压系统控制的皮带张力和比例。 CVT还在输出皮带轮轴上具有流体冷却离合器。 感测发动机速度，变速器输出速度，节气门位置和换档位置，并将代表该信息的信号传递到计算机。 计算机向控制系统提供表示所需发动机转速，管路压力和离合器冷却条件的设定点信号。 机电阀组件调节到CVT主滑轮的流体流量，以根据计算机提供的设定的发动机转速信号来控制CVT比。 第二机电阀组件根据由计算机提供的设定压力信号控制液压系统中施加到次级皮带轮以维持皮带张力的线路压力。 由控制系统调节的电磁阀可以将废液从第二阀组件直接返回到贮槽，或者在指示冷却时将流体传递到离合器。

公开(公告)号：US06099424A

公开(公告)日：2000-08-08

申请号：US222952

申请日：1998-12-30

申请人： Shan-Chin Tsai ,  William G. Durtschi

发明人： Shan-Chin Tsai ,  William G. Durtschi

IPC分类号： B62M9/06 ,  F16H61/662 ,  F16H59/00 ,  F16H9/00 ,  F16H61/00

CPC分类号： F16H61/662

摘要： A continuously variable transmission, and particularly a control arrangement thereof and a method for recovering belt slippage in the transmission, are disclosed. A source of hydraulic pressure is operatively connected for driving each of the hydraulically operated actuators for axially movable sheaves of primary and secondary pulleys of the transmission. A hydraulic pressure control loop controls the hydraulic pressure applied to the actuator of the secondary pulley as a function of the load of the device being driven on the transmission and the pitch radius of the secondary pulley. An output speed control loop controls the output speed of the transmission driving the device to be driven during normal operation of the transmission. Preferably, the output speed control loop may be set to control the output speed at a constant value for driving an aircraft electric generator. A belt speed matching loop overrides the output speed control loop for adjusting the transmission ratio when a condition of belt slipping is detected to recover from belt slipping.

摘要翻译： 公开了一种无级变速器，特别是其控制装置和用于在变速器中回收皮带打滑的方法。 可操作地连接液压源，用于驱动每个液压操作的致动器用于变速器的主轮和副皮带轮的可轴向移动的滑轮。 液压控制回路根据在变速器上驱动的装置的负载和次级带轮的节圆半径来控制施加到次级带轮的致动器的液压压力。 输出速度控制回路控制在变速器的正常运行期间驱动要驱动的装置的变速器的输出速度。 优选地，可以设置输出速度控制回路以将输出速度控制在用于驱动飞机发电机的恒定值。 当检测到皮带打滑状况从皮带打滑中恢复时，皮带速度匹配回路将覆盖用于调节传动比的输出速度控制回路。

公开(公告)号：US5953220A

公开(公告)日：1999-09-14

申请号：US217425

申请日：1998-12-21

申请人： Shan-Chin Tsai ,  Vietson M. Nguyen

发明人： Shan-Chin Tsai ,  Vietson M. Nguyen

IPC分类号： H02M7/48 ,  H02M7/537 ,  H02M1/12 ,  H03L7/00

CPC分类号： H02M7/48 ,  H02M7/537 ,  H02M2001/0022

摘要： In an inverting system, a reference V.sub.REF is coupled to an input of a predictor. The predictor has an output V.sub.P and a transfer function T.sub.P. An inverter of the inverting system has a pulse width modulator, a filter, and a transfer function T.sub.I. The transfer function T.sub.P is substantially equal to 1/T.sub.I. The inverter has an output V.sub.C, and the inverter is coupled to the output V.sub.P so that V.sub.C =V.sub.REF T.sub.P T.sub.I =V.sub.REF. In this manner, the output of the inverter tracks the reference without phase error.

摘要翻译： 在反相系统中，参考VREF耦合到预测器的输入端。 预测器具有输出VP和传递函数TP。 反相系统的反相器具有脉冲宽度调制器，滤波器和传递函数TI。 传递函数TP基本上等于1 / TI。 逆变器具有输出VC，并且反相器耦合到输出VP，使得VC = VREFTPTI = VREF。 以这种方式，逆变器的输出跟踪参考而没有相位误差。

公开(公告)号：US5779446A

公开(公告)日：1998-07-14

申请号：US553180

申请日：1995-11-07

申请人： Jon B. Althof ,  Shan-Chin Tsai ,  Teddy L. Jones

发明人： Jon B. Althof ,  Shan-Chin Tsai ,  Teddy L. Jones

IPC分类号： F01D7/00 ,  F01D7/02

CPC分类号： F01D7/02 ,  F01D7/00 ,  Y02T50/671 ,  Y02T50/673

摘要： An air driven turbine having variable pitched blades is provided that includes a pitch change mechanism and associated control circuits for automatically adjusting the pitch of the blades during either rotating or non-rotating operational modes of the air driven turbine. The pitch control mechanism includes a resettable overspeed protection device which is directly actuated by an overspeed condition of the turbine and operates independently from the pitch change mechanism to move the blades to a failsafe, feathered, or coarse pitch, low speed position. The pitch control mechanism utilizes a linear actuator in the form of an acme screw drive. The air driven turbine includes a ball ramp thrust bearing for attaching the blades to a hub of the turbine in such a manner that during rotation of the turbine actuation loads on the pitch change mechanism are reduced. The control circuits utilize simple on-off switching circuits for controlling blade pitch, thereby eliminating the need for more complex PID type control functions.

摘要翻译： 提供了具有可变倾斜叶片的空气驱动涡轮机，其包括桨距改变机构和相关联的控制回路，用于在空气驱动涡轮机的旋转或非旋转操作模式期间自动调节桨叶的桨距。 俯仰控制机构包括可重置的超速保护装置，其直接由涡轮机的超速状态致动，并且独立于桨距变化机构操作以将叶片移动到故障保护，羽化或粗桨距低速位置。 俯仰控制机构采用直角螺丝传动形式的线性致动器。 空气驱动涡轮机包括用于将叶片附接到涡轮机的轮毂的滚珠斜坡推力轴承，使得在叶轮变化机构上的涡轮致动负载的旋转减小时。 控制电路利用简单的开 - 关切换电路来控制叶片间距，从而无需更复杂的PID控制功能。

公开(公告)号：US5132894A

公开(公告)日：1992-07-21

申请号：US580076

申请日：1990-09-10

申请人： Gregory I. Rozman ,  Alexander Cook ,  Albert L. Markunas ,  Madan L. Bansal ,  Shan-Chin Tsai

发明人： Gregory I. Rozman ,  Alexander Cook ,  Albert L. Markunas ,  Madan L. Bansal ,  Shan-Chin Tsai

IPC分类号： H02J1/02 ,  H02M1/14

CPC分类号： H02J1/02 ,  H02M1/14

摘要： The problem of filtering DC power on a DC bus (46) in an electrical power generating system (10) is resolved using an active damper circuit (44). The active damper circuit (44) comprises a capacitor (CD) and a switching circuit (70) for alternately switching the capacitor (CD) into and out of parallel relationship with the DC bus (46).

摘要翻译： 使用主动阻尼电路（44）来解决在发电系统（10）中对DC总线（46）进行直流电力过滤的问题。 主动阻尼器电路（44）包括电容器（CD）和用于将电容器（CD）交换地切换成与DC母线（46）并联的关系的开关电路（70）。

公开(公告)号：US5049799A

公开(公告)日：1991-09-17

申请号：US528553

申请日：1990-05-25

申请人： Shan-Chin Tsai ,  Donald G. Kilroy

发明人： Shan-Chin Tsai ,  Donald G. Kilroy

IPC分类号： G05B19/23

CPC分类号： G05B19/232

摘要： In a control (100) for a variable displacement hydraulic motor (12) having an electrically controlled hydraulic servo valve (14) for controlling the displacement of a hydraulic motor by varying position of a wobbler (28) in response to a servo valve control signal, a velocity transducer (72), coupled to a shaft (30) driven by the motor, for providing a velocity signal representative of the velocity of the shaft, and a wobbler position sensor (84), coupled to the wobbler, for producing a wobbler position signal indicative of the position of the wobbler, an improvement in accordance with the invention includes a controller (100) for producing the servo valve control signal as a function of a wobbler position command specifying a position of the wobbler wherein the wobbler position command is a function of at least one of the velocity signal representative of the velocity of the shaft and the wobbler position signal.

摘要翻译： 在具有电控液压伺服阀（14）的可变排量液压马达（12）的控制装置（100）中，用于通过根据伺服阀控制信号改变摆臂（28）的位置来控制液压马达的位移 ，耦合到由所述电动机驱动的轴（30）的速度传感器（72），用于提供代表所述轴的速度的速度信号;以及耦合到所述摆动器的摆动位置传感器（84），用于产生 指示摆动器位置的摆动位置信号，根据本发明的改进包括：控制器（100），用于根据指定摆动器位置的摆动位置指令产生伺服阀控制信号，其中摆动位置指令 是代表轴的速度和摆动位置信号的速度信号中的至少一个的函数。

公开(公告)号：US06179739B2

公开(公告)日：2001-01-30

申请号：US09222948

申请日：1998-12-30

申请人： Shan-Chin Tsai ,  William G. Durtschi

发明人： Shan-Chin Tsai ,  William G. Durtschi

IPC分类号： F16H5900

CPC分类号： F16H61/66272 ,  B60W2710/025 ,  F16H2061/6618

摘要： A continuously variable transmission and method for preventing transmission belt slippage in the case of a sudden increase in load torque on the transmission involves both inserting a lag in the transmission to allow the control loops time to respond to the sudden increase in load torque and speeding up the responses of the control loops in response to the sudden increase in load torque. The transmission is used to drive an aircraft electrical generator at a constant speed in the disclosed embodiment.

摘要翻译： 在变速器上的负载转矩突然增加的情况下，用于防止传动带打滑的无级变速器和方法包括在变速器中插入滞后，以允许控制回路的时间响应负载转矩的突然增加和加速 响应于负载转矩突然增加的控制回路的响应。 在所公开的实施例中，变速器用于以恒定速度驱动飞行器发电机。

公开(公告)号：US5717585A

公开(公告)日：1998-02-10

申请号：US686648

申请日：1996-07-24

申请人： Vietson M. Nguyen ,  Shan-Chin Tsai

发明人： Vietson M. Nguyen ,  Shan-Chin Tsai

IPC分类号： H02M7/538 ,  H02M7/5387 ,  H02M7/539 ,  H02M3/24

CPC分类号： H02M7/53803 ,  H02M7/53871 ,  H02M7/539

摘要： An inverter system (10) in accordance with the invention includes an electrical load (R,L) having a direct current source (E) for providing direct current to at least one pair of inverter switches Q.sub.1 and Q.sub.2 with the at least one pair of switches being switched between conducting and non-conducting states to control a direction of flow of current pulses between the direct current source and the electrical load to cause the flow of alternating current through the electrical load; a source of a voltage reference (V.sub.ref) representing a desired form of the alternating current to flow through the electrical load; an error control signal generator (24) having a first input coupled to the electrical load and a second input coupled to the voltage reference for generating on an output (26) an error control voltage representing a difference between the first and second inputs; and an inverter controller (16), coupled to the output of the error control signal generator and to the inverter, for controlling a frequency of switching of the at least one pair of switches in response to the error control voltage to produce current pulses flowing through the electrical load occurring at a variable frequency which provides the alternating current flow through the electrical load.

摘要翻译： 根据本发明的逆变器系统（10）包括具有直流源（E）的电负载（R，L），用于向至少一对逆变器开关Q1和Q2提供直流电流，所述逆变器开关具有至少一对 开关在导通状态和非导通状态之间切换，以控制直流电源和电负载之间的电流脉冲的流动方向，以使交流电流流过电负载; 表示期望形式的交流电流流经电负载的电压基准源（Vref）; 误差控制信号发生器（24），其具有耦合到所述电负载的第一输入和耦合到所述电压参考的第二输入，用于在输出（26）上产生表示所述第一和第二输入之间的差的误差控制电压; 以及逆变器控制器（16），其耦合到所述误差控制信号发生器和所述逆变器的输出端，用于响应于所述误差控制电压来控制所述至少一对开关的切换频率，以产生流过的电流脉冲 以可变频率发生的电负载，其提供通过电负载的交流电流。

公开(公告)号：US4932435A

公开(公告)日：1990-06-12

申请号：US380882

申请日：1989-07-17

申请人： Mark S. Stroze ,  Shan-Chin Tsai

发明人： Mark S. Stroze ,  Shan-Chin Tsai

IPC分类号： F16K17/28 ,  G05D7/01

CPC分类号： F16K17/28 ,  G05D7/0126 ,  Y10T137/7792 ,  Y10T137/7847 ,  Y10T137/7869 ,  Y10T137/7905 ,  Y10T137/88022

摘要： The problem of controlling overspeed and/or oscillation of a variable displacement hydromechanical actuation system is solved by a multi-stage flow regulating valve (18) which includes a valve body (20, 22) having a fluid inlet (24) and a fluid outlet (26) defining a flow path (A,B) through the valve body. A first stage valve piston (30) is reciprocally mounted within a cylinder (28) in the valve body (20) in the flow path between the inlet and the outlet for restricting fluid flow in response to a first range of incoming fluid pressure. The first stage piston (30) has an inlet orifice (34) exposed to the incoming fluid and an outlet port (36) in registry with the outlet (26) of the valve body (20). A second stage valve piston (44) is reciprocally mounted within the first stage piston (30) and has an orifice plate (46) for covering the inlet orifice (34) of the first stage valve piston (30). The orifice plate has smaller orifices (48) for further restricting fluid flow through the valve body. The first stage piston is loaded by a spring (38) defining a first range of incoming fluid pressure and the reference pressure on the second stage valve piston defines a second range of incoming fluid pressure to provide a distinct multi-level range of regulating pressures.

摘要翻译： 通过多级流量调节阀（18）来解决控制可变排量液压机械致动系统的超速和/或振荡的问题，该多级流量调节阀包括具有流体入口（24）和流体出口（24）的阀体（20,22） （26）限定通过阀体的流动路径（A，B）。 第一级阀活塞（30）在入口和出口之间的流动路径中往复安装在阀体（20）内的气缸（28）中，用于响应于进入的流体压力的第一范围来限制流体流动。 第一级活塞（30）具有暴露于进入流体的入口孔（34）和与阀体（20）的出口（26）对准的出口端口（36）。 第二级阀活塞（44）往复安装在第一级活塞（30）内并具有用于覆盖第一级阀活塞（30）的入口孔（34）的孔板（46）。 孔板具有较小的孔口（48），用于进一步限制通过阀体的流体流动。 第一级活塞由限定第一入口流体压力范围的弹簧（38）加载，并且第二级阀活塞上的参考压力限定了进入流体压力的第二范围，以提供不同的多级调节压力范围。