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公开(公告)号：US5610490A
公开(公告)日：1997-03-11
申请号：US548064
申请日：1995-10-25
CPC分类号： B60L15/025 , B60L3/00 , B60L2220/12 , Y02T10/643
摘要： A torque shudder protection device for an induction machine includes a flux command generator for supplying a steady state flux command and a torque shudder detector for supplying a status including a negative status to indicate a lack of torque shudder and a positive status to indicate a presence of torque shudder. A flux adapter uses the steady state flux command and the status to supply a present flux command identical to the steady state flux command for a negative status and different from the steady state flux command for a positive status. A limiter can receive the present flux command, prevent the present flux command from exceeding a predetermined maximum flux command magnitude, and supply the present flux command to a field oriented controller. After determining a critical electrical excitation frequency at which a torque shudder occurs for the induction machine, a flux adjuster can monitor the electrical excitation frequency of the induction machine and adjust a flux command to prevent the monitored electrical excitation frequency from reaching the critical electrical excitation frequency.
摘要翻译： 用于感应电动机的扭矩颤动器保护装置包括用于提供稳态通量指令的通量指令发生器和用于提供包括负状态的状态的扭矩颤抖检测器，以指示缺少扭矩颤抖和正状态以指示存在 扭矩颤抖。 磁通适配器使用稳态磁通指令，状态为负状态提供与稳态磁通指令相同的当前磁通指令，并且与稳态磁通指令不同于正状态。 限制器可以接收当前的磁通指令，防止当前的磁通指令超过预定的最大磁通指令量值，并将现在磁通指令提供给磁场定向控制器。 在确定感应电机发生扭矩颤动的临界电激励频率之后，磁通调节器可以监测感应电机的电激励频率并调整磁通指令，以防止监控的电激励频率达到临界电激励频率 。
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公开(公告)号：US5280421A
公开(公告)日：1994-01-18
申请号：US899807
申请日：1992-06-17
IPC分类号： H02M7/48 , H02M7/5387 , H02M7/44
CPC分类号： H02M7/53875 , H02M7/4826
摘要： A current regulator for a four-legged, three-phase inverter determines the next optimal, or near-optimal, inverter state in a relatively short time period based on phase current error signals and back-emf's, resulting in low harmonic distortion, reduced current ripple, minimal current stresses, and increased utilization of the available dc bus voltage over a high bandwidth.
摘要翻译： 四相三相逆变器的电流调节器基于相电流误差信号和反电动势在相对短的时间段内确定下一个最佳或接近最佳的逆变器状态，导致低谐波失真，减小的电流 纹波，最小电流应力，以及高带宽上可用的直流总线电压的利用率。
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3.发明授权Switched reluctance motor drive system and laundering apparatus employing same 失效开关磁阻电机驱动系统和使用该驱动系统的洗衣机
公开(公告)号：US4959596A
公开(公告)日：1990-09-25
申请号：US332205
申请日：1989-04-03
CPC分类号： H02P6/18 , D06F37/304
摘要： A microcomputer-based drive system for a switched reluctance motor requires no rotor position sensor and no discrete current sensors. Phase excitation is synchronized with rotor position by indirectly estimating rotor position according to instantaneous phase inductance. Current regulation is achieved by incorporating pilot devices for current sensing into the switching devices of the power converter and by employing a fixed off-time current chopping strategy. One application is for use in a laundering machine.
摘要翻译： 用于开关磁阻电机的基于微机的驱动系统不需要转子位置传感器，也不需要离散的电流传感器。 通过根据瞬时相电感间接估计转子位置，相位激励与转子位置同步。 通过将用于电流感测的导频装置并入功率转换器的开关装置并采用固定的关断时间电流斩波策略来实现电流调节。 一个应用程序用于洗衣机。
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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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公开(公告)号：US4713594A
公开(公告)日：1987-12-15
申请号：US915291
申请日：1986-10-03
申请人： Bimal K. Bose , Paul M. Szczesny
发明人： Bimal K. Bose , Paul M. Szczesny
CPC分类号： H02P1/163 , H02P25/092 , H02P25/0925
摘要： A start-up control for a switched reluctance motor employs an encloder for generating a rotor position information signal for each stator phase and a start-up signal processor. The processor receives the rotor position information signals and processes them in accordance with a direction command. To initiate forward rotation, the information signals are complemented; to initiate reverse rotation, the information signals for adjacent phases are AND-coupled.
摘要翻译： 用于开关磁阻电动机的启动控制采用包围器来产生每个定子相位的转子位置信息信号和启动信号处理器。 处理器接收转子位置信息信号并根据方向命令进行处理。 为了启动正向旋转，信息信号被补充; 为了启动反向旋转，相邻相位的信息信号被AND耦合。
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6.发明授权Adjustable speed AC drive system control for operation in pulse width modulation and quasi-square wave modes 失效可调速度交流驱动系统控制，用于脉宽调制和准方波操作
公开(公告)号：US4926104A
公开(公告)日：1990-05-15
申请号：US423169
申请日：1989-10-18
申请人： Robert D. King , Paul M. Szczesny
发明人： Robert D. King , Paul M. Szczesny
IPC分类号： H02M7/5387 , H02P27/04
CPC分类号： H02P23/08 , H02M7/53875 , H02P23/0027
摘要： A polyphase AC motor drive system comprises an electric power inverter and control means which enables operation in, and allows smooth transition between, a current controlled PWM mode and a quasi-square wave mode of operation. At low motor speeds, the system operates in PWM mode. At higher speeds, above the corner point speed of the motor, the system operates in a quasi-square wave mode. Smooth transitions between modes of operation are controlled by a microcomputer which counts the number of current chops made by a switching device in a preselected phase leg of the inverter over a time interval that varies with the desired fundamental period of the motor current. As speed increases and approaches the corner point, the number of chops decreases below a first predetermined number, and the system transitions from PWM to quasi-square wave mode. As speed decreases, the number of chops increases above a second predetermined number (larger than the first), and the system transitions back to PWM mode. A motor speed command is limited by an adjustable clamp circuit, depending upon the DC link voltage, resulting in a robust drive that is not affected by utility brownouts or line transients.
摘要翻译： 多相交流电动机驱动系统包括电力逆变器和控制装置，其能够在电流控制PWM模式和准方波操作模式之间操作并允许平滑过渡。 在低电机速度下，系统工作在PWM模式。 在更高的速度下，高于电机的角点速度，系统以准方波模式工作。 在操作模式之间的平滑转换由微计算机控制，该微型计算机在随着电动机电流的期望基频周期变化的时间间隔内，对由逆变器的预选相位段中的开关装置进行的电流斩波数进行计数。 随着速度增加并接近角点，斩波数减少到低于第一预定数量，并且系统从PWM转换为准方波模式。 当速度降低时，斩波数增加到超过第二预定数（大于第一个），并且系统转换回到PWM模式。 电机速度指令受可调钳位电路的限制，具体取决于直流母线电压，导致强大的驱动器不受实用电压或线路瞬变影响。
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公开(公告)号：US4739240A
公开(公告)日：1988-04-19
申请号：US44075
申请日：1987-04-29
CPC分类号： H02P25/0925
摘要： A commutator for a microcomputer based switched reluctance drive employs a selectively addressable non-volatile memory, e.g. a ROM, to store stator phase firing patterns and facilities selective adjustment of turn-on angle and pulsewidth of phase switching current pulses. Firing patterns differing only in pulsewidth of their respective pulses can be stored in different sections of the memory or in the same section where word bit width permits. The adjustment of pulse position and duration allows torque control of the motor over a very wide speed range.
摘要翻译： 用于基于微机的开关磁阻驱动器的换向器采用选择性寻址的非易失性存储器，例如， ROM，用于存储定子相点火模式和设备选择性地调节相切换电流脉冲的导通角和脉冲宽度。 可以在存储器的不同部分或字位宽度允许的相同部分中存储仅在各自脉冲的脉冲宽度上不同的发射模式。 脉冲位置和持续时间的调整允许电机在非常宽的速度范围内进行扭矩控制。
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