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1. 发明授权

US4584505A Torque-speed control system for asynchronous D.C. brushless motor 失效
标题翻译：异步直流无刷电机转矩控制系统
公开(公告)号：US4584505A
公开(公告)日：1986-04-22
申请号：US620586
申请日：1984-06-14
申请人： Yeongchoon Chung , Myunghwan Kim
发明人： Yeongchoon Chung , Myunghwan Kim
IPC分类号： H02P6/06 , H02P6/02
CPC分类号： H02P6/06
摘要： A closed loop, asynchronous control circuit for a brushless D. C. motor is disclosed. The motor includes a stator having two-phase windings and a permanent magnet rotor. A binary code corresponding to the stator poles is carried by the rotor, and is detected by a sensor upon rotation of the rotor. The sensor provides a feedback signal comprising a train of pulses having a repetition rate, or pulse width, proportional to the rotor speed. The feedback signal is supplied to a delay circuit, and a delayed control pulse train is supplied to a logic circuit which produces a two-phase output. The logic circuit output charges the polarities of the motor stator windings in accordance with the transitions of the control pulse train between high and low values, to thereby control the motor speed.The delay circuit is variable to control the speed of the motor. A variable supply provides a controlled voltage level to switching circuits which drive the motor under the control of the two-phase logic circuit output. The voltage level is varied inversely with the delay time of the delay circuit to control the motor torque-speed characteristic.
摘要翻译：公开了一种用于无刷直流电动机的闭环异步控制电路。电动机包括具有两相绕组的定子和永磁转子。对应于定子极的二进制码由转子承载，并且在转子旋转时由传感器检测。传感器提供包括与转子速度成比例的重复频率或脉冲宽度的脉冲串的反馈信号。将反馈信号提供给延迟电路，延迟的控制脉冲串被提供给产生两相输出的逻辑电路。逻辑电路输出根据控制脉冲序列在高值和低值之间的转变，对电机定子绕组的极性进行充电，从而控制电机转速。延迟电路是可变的，以控制电机的速度。可变电源为在两相逻辑电路输出的控制下驱动电动机的开关电路提供受控的电压电平。电压电平与延迟电路的延迟时间反向变化，以控制电机转矩 - 转速特性。

2. 发明授权

US08447036B2 Multi-party key agreement method using bilinear map and system therefor 失效
标题翻译：使用双线性映射及其系统的多方密钥协商方法
公开(公告)号：US08447036B2
公开(公告)日：2013-05-21
申请号：US12179652
申请日：2008-07-25
申请人： Namsu Jho , Dowon Hong , Myunghwan Kim , Byunggil Lee
发明人： Namsu Jho , Dowon Hong , Myunghwan Kim , Byunggil Lee
IPC分类号： H04L9/00
CPC分类号： H04L9/3073 , H04L9/083
摘要： The present invention provides an efficient method and system in which a plurality of participants share a secret key in a communication environment that is not ensured. According to an embodiment of the invention, each of the participants is assigned with a secret key from a key generation party, generates exchange information, and transmits its own exchange information to the other participant to exchange the exchange information with each other. Each of the participants generates a shared key on the basis of the exchange information and its own secret key.
摘要翻译：本发明提供了一种有效的方法和系统，其中多个参与者在不能确保的通信环境中共享秘密密钥。根据本发明的一个实施例，从密钥生成方分配了每个参与者的秘密密钥，产生交换信息，并将其自己的交换信息发送给另一个参与者以交换彼此的交换信息。每个参与者基于交换信息及其自己的秘密密钥生成共享密钥。

3. 发明授权

US5140511A Switched mode power supply having a discharge circuit for an auxiliary power source 失效
标题翻译：具有辅助电源的放电电路的开关模式电源
公开(公告)号：US5140511A
公开(公告)日：1992-08-18
申请号：US694632
申请日：1991-05-02
申请人： Intae Lee , Myunghwan Kim
发明人： Intae Lee , Myunghwan Kim
IPC分类号： H02H7/12 , H02M3/28 , H02M3/335 , H02M7/06 , H02M7/12
CPC分类号： H02H7/12 , H02H7/1213 , H02M3/335 , H02M3/33553
摘要： A switched-mode power supply including a primary rectifying circuit connected to an AC power supply, a transformer connected to the primary rectifying circuit, a secondary rectifying circuit connected to the secondary side of the transformer, a voltage fluctuation detector for sensing fluctuation in the output voltage, a signal generator for generating switching signals in response to the fluctuation detector, a switching tansistor for shunting the transformer to ground in response to the switching signals, a protective circuit responsive to the output voltage for stopping any abnormal operation of the switching signal generator, and an auxiliary power circuit for supplying power to the switching signal generator and to the protective circuit. The power supply further comprises an AC power cut-off detecting circuit for detecting whether the AC power is interrupted and a discharge circuit for discharging any residual electric charge of the auxiliary power circuit according to the output of the detecting circuit.
摘要翻译：一种开关电源，包括连接到AC电源的初级整流电路，连接到初级整流电路的变压器，连接到变压器的次级侧的次级整流电路，用于感测输出的波动的电压波动检测器电压，用于响应于波动检测器产生开关信号的信号发生器，用于响应于开关信号将变压器分流到地的开关变阻器;响应于输出电压的保护电路，用于停止开关信号发生器的任何异常操作以及用于向开关信号发生器和保护电路供电的辅助电源电路。电源还包括用于检测AC电力是否中断的AC电力切断检测电路和用于根据检测电路的输出放出辅助电力电路的剩余电荷的放电电路。

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