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1.发明授权Circuit, motor, and method generating a signal representing back EMF in an energized motor winding 失效电路，电动机和方法产生表示在电动机绕组中的反电动势的信号
公开(公告)号：US5696430A
公开(公告)日：1997-12-09
申请号：US469200
申请日：1995-06-06
申请人： David M. Erdman , Eric R. Benedict
发明人： David M. Erdman , Eric R. Benedict
CPC分类号： H02P25/04 , F23N3/082 , H02K29/03 , H02P6/085 , H02P6/182 , H02P6/26 , F23N2025/04 , F23N2025/06 , F23N2033/04 , F23N5/18 , H02K2201/06 , H02P6/08
摘要： A motor includes a stationary assembly and a rotatable assembly in magnetic coupling relation thereto. The stationary assembly includes a winding, the rotation of the rotatable assembly inducing a back EMF in the winding. A power supply for supplying a voltage across the winding drives a current through the winding. A back EMF sensor connected to the winding generates a back EMF signal representative of the back EMF induced in the winding during periods of time when the voltage is being supplied across the winding. An inverter connected between the power supply and the winding commutates the winding as a function of the back EMF signal, whereby the rotatable assembly rotates. A method of operating the motor and a control circuit for the motor employ the back emf induced in the winding during periods when the voltage is being applied to the winding by the power supply.
摘要翻译： 电动机包括固定组件和与其耦合的磁耦合的可旋转组件。 固定组件包括绕组，可旋转组件的旋转引起绕组中的反电动势。 用于在绕组上提供电压的电源驱动通过绕组的电流。 连接到绕组的反电动势传感器产生表示在绕组上提供电压的时间段期间在绕组中感应的反电动势的反EMF信号。 连接在电源和绕组之间的逆变器根据反电动势信号将绕组换向，由此可旋转组件旋转。 在通过电源将电压施加到绕组的期间，操作电动机的方法和用于电动机的控制电路采用在绕组中感应的反电动势。
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公开(公告)号：US5796194A
公开(公告)日：1998-08-18
申请号：US680010
申请日：1996-07-15
申请人： William R. Archer , Roger C. Becerra , Brian L. Beifus , Mark A. Brattoli , David M. Erdman , Thomas M. Jahns , Gerald B. Kliman , Wen Liang Soong , Charles M. Stephens , Eric R. Benedict , Michael W. Degner
发明人： William R. Archer , Roger C. Becerra , Brian L. Beifus , Mark A. Brattoli , David M. Erdman , Thomas M. Jahns , Gerald B. Kliman , Wen Liang Soong , Charles M. Stephens , Eric R. Benedict , Michael W. Degner
摘要： A single phase permanent magnet motor includes a rotor, a stator, and a quadrature axis winding positioned out-of-phase from a main winding of the stator for generating an output signal representative of rotor angular position. An integrator can be coupled to the quadrature axis winding for phase retarding the output signal, and a comparator can be coupled to the integrator for detecting zero crossings of the phase retarded output signal to provide a commutation signal. The quadrature axis winding can be positioned about ninety electrical degrees out-of-phase from the main winding of the stator, and the integrator can be adapted to phase retard the output signal by a number of degrees which decreases as a speed of the motor increases. At low speeds the phase retard is preferably at about ninety degrees so that the phase retarded signal becomes in-phase with the main stator winding back EMF voltage. The motor may further include a rectifier coupled to the quadrature axis winding for rectifying the output signal, and a lowpass filter for filtering the rectified output signal to provide a signal proportional to velocity. Also the single phase motor is commutated for maximum torque production.
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3.发明授权
公开(公告)号：US5986419A
公开(公告)日：1999-11-16
申请号：US48946
申请日：1998-03-26
申请人： William R. Archer , Roger C. Becerra , Brian L. Beifus , Mark A. Brattoli , David M. Erdman , Thomas M. Jahns , Gerald B. Kliman , Wen Liang Soong , Charles M. Stephens , Eric R. Benedict , Michael W. Degner
发明人： William R. Archer , Roger C. Becerra , Brian L. Beifus , Mark A. Brattoli , David M. Erdman , Thomas M. Jahns , Gerald B. Kliman , Wen Liang Soong , Charles M. Stephens , Eric R. Benedict , Michael W. Degner
摘要： A single phase permanent magnet motor includes a rotor, a stator, and a quadrature axis winding positioned out-of-phase from a main winding of the stator for generating an output signal representative of rotor angular position. An integrator can be coupled to the quadrature axis winding for phase retarding the output signal, and a comparator can be coupled to the integrator for detecting zero crossings of the phase retarded output signal to provide a commutation signal. The quadrature axis winding can be positioned about ninety electrical degrees out-of-phase from the main winding of the stator, and the integrator can be adapted to phase retard the output signal by a number of degrees which decreases as a speed of the motor increases. At low speeds the phase retard is preferably at about ninety degrees so that the phase retarded signal becomes in-phase with the main stator winding back EMF voltage. The motor may further include a rectifier coupled to the quadrature axis winding for rectifying the output signal, and a lowpass filter for filtering the rectified output signal to provide a signal proportional to velocity. Also the single phase motor is commutated for maximum torque production.
摘要翻译： 单相永磁电动机包括转子，定子和与定子的主绕组不同相位置的正交绕组，用于产生表示转子角位置的输出信号。 积分器可以耦合到正交轴线圈，用于相位延迟输出信号，并且比较器可以耦合到积分器，用于检测相位延迟输出信号的过零点以提供换向信号。 正交绕组可以定位在与定子的主绕组相差大约九十度的位置上，并且积分器可以适合于将输出信号相位延迟多少度，随着电机速度的增加而减小 。 在低速时，相位延迟优选地在大约九十度，使得相位延迟信号与主定子绕组反电动势电压同相。 电动机还可以包括耦合到正交轴线圈的整流器，用于整流输出信号;以及低通滤波器，用于对整流的输出信号进行滤波以提供与速度成比例的信号。 单相电动机也可以进行换向，以实现最大扭矩产生。
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公开(公告)号：US5838127A
公开(公告)日：1998-11-17
申请号：US760470
申请日：1996-12-05
申请人： Glen C. Young , Brian L. Beifus , Robert K. Hollenbeck , Austars R. Schnore , Charles M. Stephens , Paul M. Szczesny , Thomas M. Jahns , Eric R. Benedict
发明人： Glen C. Young , Brian L. Beifus , Robert K. Hollenbeck , Austars R. Schnore , Charles M. Stephens , Paul M. Szczesny , Thomas M. Jahns , Eric R. Benedict
摘要： A motor system having a stationary assembly including a winding and a rotatable assembly in magnetic coupling relation to the stationary assembly. A power supply link having upper and lower rails supplied by a power supply provides power to the motor winding. The power supply link has power switches responsive to a motor control signal for selectively connecting the rails to the winding to energize the winding with a motor current whereby an electromagnetic field is produced for rotating the rotatable assembly. The power switches include a set of upper power switches and a set of lower power switches. Each of the power switches has a conducting state and a nonconducting state. The system includes a disable circuit for selectively generating a disable signal and a control circuit for generating the motor control signal to control the power switches. The control circuit is responsive to the disable signal for controlling the power switches so that the lower power switches become conducting and the upper power switches become nonconducting, or vice-versa, thereby de-energizing the winding to disable the motor. Other features are also disclosed including circuitry for commutating the motor in advance of zero crossings of the back electromotive force, correcting asymmetries in the commutation intervals and reversing the motor.
摘要翻译： 一种具有固定组件的电动机系统，其包括绕组和与固定组件磁耦合的可旋转组件。 具有由电源供应的上部和下部导轨的电源链路为电动机绕组提供电力。 电源链路具有响应于电动机控制信号的电力开关，用于选择性地将轨道连接到绕组，以利用电动机电流激励绕组，由此产生用于旋转可旋转组件的电磁场。 电源开关包括一组上电源开关和一组低功率开关。 每个电源开关具有导通状态和不导通状态。 该系统包括用于选择性地产生禁用信号的禁止电路和用于产生电动机控制信号以控制功率开关的控制电路。 控制电路响应于用于控制功率开关的禁用信号，使得下功率开关变为导通，并且上电源开关变为不导通，反之亦然，从而使绕组断电以禁用电动机。 还公开了其它特征，包括用于在反电动势的零交叉之前换向马达的电路，校正换向间隔中的不对称性并使马达反转。
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