公开(公告)号：US07439692B2

公开(公告)日：2008-10-21

申请号：US10790700

申请日：2004-03-03

Applicant: Kwang Woon Lee

Inventor： Kwang Woon Lee

IPC: H02K41/02

CPC classification number: F04B35/045 ,  F04B49/065 ,  F04B2201/0202 ,  F04B2203/0401 ,  F04B2203/0402

Abstract: A linear compressor and apparatus to control the linear compressor are provided which allows a frequency of a drive current supplied to a drive motor to synchronize with a resonance frequency varying according to a load fluctuation, in real time, thus obtaining a maximum efficiency of the linear compressor. The linear compressor includes a drive motor, a piston reciprocating by the drive motor and a control unit generating a reference current having a phase difference of 90° with respect to a displacement waveform of the piston and a frequency equal to the displacement waveform of the piston, and controls a drive current supplied to the drive motor to synchronize with a resonance frequency of the piston by synchronizing the drive current with the reference current.

Abstract translation: 提供了一种用于控制线性压缩机的线性压缩机和装置，其允许提供给驱动电动机的驱动电流的频率与根据负载波动变化的谐振频率实时同步，从而获得线性压缩机的最大效率 压缩机。 线性压缩机包括驱动电动机，由驱动电动机往复运动的活塞和控制单元，该控制单元生成相对于活塞的位移波形具有90°的相位差的参考电流，并且频率等于活塞的位移波形 并且通过使驱动电流与参考电流同步来控制提供给驱动电动机的驱动电流与活塞的共振频率同步。

公开(公告)号：US07095204B2

公开(公告)日：2006-08-22

申请号：US11183956

申请日：2005-07-19

Applicant: Kwang Woon Lee ,  Dae Kyong Kim ,  Sang Taek Lee ,  Hyen Young Choi

Inventor： Kwang Woon Lee ,  Dae Kyong Kim ,  Sang Taek Lee ,  Hyen Young Choi

IPC: H02P1/46

CPC classification number: H02P6/20 ,  H02P6/182

Abstract: A startup control method of a BLDC motor is disclosed. The method can control the BLDC motor to prevent the generation of a transient current such that the vibration of the BLDC motor can be reduced at the startup stage and perform a stable conversion into a sensorless operation mode such that the startup failure rate of the BLDC motor can be reduced. The startup control method includes commutating a current applied to stator windings according to a rotor position. The method of operating the BLDC motor includes a rotor position that is forcibly aligned and so that phase commutation is performed, a back-electromotive force (back-emf) is detected from a lead voltage of a phase of a voltage which is not applied thereto after performing phase commutation and a determination is performed as to whether the detected back-emf is in a rising interval. The lead voltage of the phase of the voltage which is not applied thereto is integrated, such that if the back-emf is in a rising interval and if an instance that the integration result is greater than a predetermined value a phase commutation time point is set and conversion into a sensorless operation mode is performed if the back-emf detected from the lead voltage is in a stable interval, based on a frequency of the voltage applied to the stator winding.

Abstract translation: 公开了一种BLDC电机的启动控制方法。 该方法可以控制BLDC电机，以防止瞬态电流的产生，从而可以在起动阶段减小BLDC电机的振动，并执行稳定转换为无传感器运行模式，使得BLDC电机的启动故障率 可以减少 启动控制方法包括根据转子位置对应用于定子绕组的电流进行换向。 操作BLDC电动机的方法包括被强制对准的转子位置，从而进行相位换向，从未施加到其上的电压的相位的引导电压检测反向电动势（反电动势） 在执行相位换向之后，执行关于所检测的反电动势是否处于上升间隔的确定。 未对其施加的电压的相位的引导电压被积分，使得如果反电动势处于上升间隔，并且如果积分结果大于预定值的情况，则设置相位换向时间点 并且如果从引线电压检测到的反电动势基于施加到定子绕组的电压的频率处于稳定的间隔，则执行转换为无传感器操作模式。