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公开(公告)号：US5524168A
公开(公告)日：1996-06-04
申请号：US398271
申请日：1995-03-03
CPC分类号： H02P6/06 , Y10S388/903 , Y10S388/909
摘要： In two embodiments of the present invention, the speed of a DC motor is determined by examining the signal at the negative terminal of the motor. The signal is high-pass-filtered to extract the AC component of the signal. The frequency of this signal is, in almost all cases, proportional to the speed of the motor. This signal is then fed into a comparator, which converts the signal into a square wave, which is then input into a microprocessor. The microprocessor determines the frequency of the square wave. If the frequency of the square wave is below a threshold of acceptable motor speed, the microprocessor can turn off the motor and provide a malfunction indication. If the frequency of the square wave is above a second threshold of acceptable motor speed, the microprocessor can likewise turn off the motor and provide a malfunction indication.
摘要翻译： 在本发明的两个实施例中，通过检查电动机的负极端子处的信号来确定直流电动机的转速。 信号被高通滤波以提取信号的交流分量。 在几乎所有情况下，该信号的频率与电动机的速度成比例。 然后将该信号馈送到比较器，该比较器将信号转换成方波，然后将其输入微处理器。 微处理器确定方波的频率。 如果方波频率低于可接受电机转速的阈值，则微处理器可以关闭电机并提供故障指示。 如果方波的频率高于可接受的电动机速度的第二阈值，则微处理器可以同样地关闭电动机并提供故障指示。
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公开(公告)号：US5313549A
公开(公告)日：1994-05-17
申请号：US893060
申请日：1992-06-03
申请人： Seppo J. Ovaska
发明人： Seppo J. Ovaska
CPC分类号： H03H17/02 , Y10S388/901
摘要： A procedure is disclosed for filtering the speed feedback signal in an elevator motor drive which is provided with a speed controller and in which the speed of rotation of the motor is measured. The procedure of the invention involves sampling the speed feedback signal, producing a prediction of the next sample by a predicting procedure that filters the noise in the speed feedback signal, and forming an estimate of the latest sample by delaying the prediction by a time corresponding to one sample.
摘要翻译： 公开了一种用于过滤设置有速度控制器的电梯电机驱动器中的速度反馈信号的过程，其中测量电动机的旋转速度。 本发明的过程涉及对速度反馈信号进行采样，通过对速度反馈信号中的噪声进行滤波的预测过程产生下一个采样的预测，并通过将预测延迟一个与 一个样本。
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3.发明授权
公开(公告)号：US6006008A
公开(公告)日：1999-12-21
申请号：US865431
申请日：1997-05-29
CPC分类号： H02P6/06 , Y10S388/911
摘要： A high resolution speed control for a DC or BLDC phase-locked-loop (PLL) motor is provided. A phase accumulator sends a time varying frequency reference to the PLL input, where the average frequency sets the motor speed with a high degree of accuracy. A post divider is used to reduce the number of circuits required to implement the function.
摘要翻译： 提供用于DC或BLDC锁相环（PLL）电机的高分辨率速度控制。 相位累加器向PLL输入发送时变频率参考，其中平均频率以高精度设置电机速度。 后置分频器用于减少实现功能所需的电路数量。
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公开(公告)号：US5335307A
公开(公告)日：1994-08-02
申请号：US021650
申请日：1993-02-01
申请人： William F. Sommer
发明人： William F. Sommer
CPC分类号： H02P7/2855
摘要： A system and method for controlling the speed of an electric motor compares the actual speed of the motor with the desired speed of the motor. A digital comparison of the desired speed of the electric motor with the actual speed of the electric motor provides an error signal indicative of the error between the desired speed and the actual speed. A large timing current from a programmed timing control will cause an increase in the speed of the motor, while a smaller timing current from the programmed timing control will cause a decrease in the speed of the motor. In this manner, the programmed timing control affects the actual speed of the motor 12 to approach the desired speed. The programmed timing control can also provide a ramping acceleration or deceleration as the motor speed changes to approach the desired speed. The speed control system can also include a programmed stall detector which can cause the operation of the electric motor to be ceased when a stalled motor condition is detected.
摘要翻译： 用于控制电动机速度的系统和方法将电动机的实际速度与电动机的期望速度进行比较。 电动机的期望速度与电动机的实际速度的数字比较提供了指示期望速度和实际速度之间的误差的误差信号。 来自编程的定时控制的大的定时电流将导致电动机的速度的增加，而来自编程的定时控制的较小的定时电流将导致电动机的速度的降低。 以这种方式，编程的定时控制影响马达12的实际速度以接近期望的速度。 编程的定时控制还可以随着电机速度的变化而接近所需的速度而提供斜坡加速或减速。 速度控制系统还可以包括编程失速检测器，当检测到停止的电动机状况时，该失速检测器可以导致电动机的操作停止。
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公开(公告)号：US5293445A
公开(公告)日：1994-03-08
申请号：US890944
申请日：1992-05-29
CPC分类号： H03L7/095 , H03L7/107 , Y10S388/911 , Y10S388/912
摘要： A circuit automatically changes the gain in a PLL for driving a motor of the type having a motor speed signal that indicates the speed of motor rotation. The circuit includes a phase detector for sensing a phase difference between the motor speed signal and a reference frequency and for producing an output signal of duration proportional to the sensed phase difference. A counter counts clock pulses throughout the duration of the output signal, and a motor driving circuit drives the motor in response to the count reached by the counter. A source of clock pulses provides clock signals at first and second frequencies, the second frequency being lower than the first frequency, and a lock range sense circuit produces a sense signal output that indicates when the PLL is within a predetermined phase difference range. A circuit responsive to the sense signal output selectively applies the first frequency to clock the counter when the PLL is within the predetermined phase difference range, and to apply the second frequency to clock the counter when the PLL is operating outside of the predetermined phase difference range.
摘要翻译： 电路自动改变PLL中的增益，用于驱动具有指示电动机旋转速度的电动机速度信号的类型的电动机。 电路包括用于感测电动机速度信号和参考频率之间的相位差的相位检测器，并用于产生与检测到的相位差成比例的持续时间的输出信号。 计数器在输出信号的持续时间内计数时钟脉冲，并且马达驱动电路响应于计数器达到的计数来驱动马达。 时钟脉冲源在第一和第二频率处提供时钟信号，第二频率低于第一频率，锁定范围读出电路产生一个感测信号输出，指示PLL何时在预定的相位差范围内。 响应于感测信号输出的电路选择性地施加第一频率以在PLL处于预定相位差范围内时对计数器进行计时，并且当PLL在预定相位差范围之外操作时施加第二频率来对计数器计时 。
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公开(公告)号：US20050053367A1
公开(公告)日：2005-03-10
申请号：US10655993
申请日：2003-09-05
申请人： Donald Fulton
发明人： Donald Fulton
IPC分类号： H02M7/5387 , H02P5/165
CPC分类号： H02M7/53875 , H02M2001/0009
摘要： A system is provided for sensing a motor current from a three phase inverter. A first resistor is coupled between a first transistor of the inverter and a supply voltage, and a second resistor is coupled between a second transistor of the inverter and ground. Circuitry coupled to the first and second resistors generates an upper and lower current. When the first transistor is active, the upper current is proportional to the sum of a reference voltage and a voltage across the first resistor, and the lower current is proportional to the reference voltage. When the second transistor is active, the upper current is proportional to the reference voltage, and the lower current is proportional to the sum of the reference voltage and a voltage across the second resistor. Based on the difference of the lower and upper currents, the circuitry provides an output current proportional to the motor current.
摘要翻译： 提供一种用于感测来自三相逆变器的电动机电流的系统。 第一电阻器耦合在逆变器的第一晶体管和电源电压之间，第二电阻器耦合在反相器的第二晶体管和地之间。 耦合到第一和第二电阻器的电路产生上和下电流。 当第一晶体管有效时，上电流与参考电压和第一电阻两端的电压之和成比例，而较低的电流与参考电压成比例。 当第二晶体管有效时，上限电流与参考电压成比例，而较低的电流与参考电压和第二个电阻两端的电压之和成比例。 基于下限和上限电流的差异，电路提供与电机电流成比例的输出电流。
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公开(公告)号：US5892885A
公开(公告)日：1999-04-06
申请号：US76559
申请日：1998-05-12
CPC分类号： H01H9/061 , H01H2009/065 , H01H2300/002 , H01H9/52 , Y10S388/937
摘要： A motor control circuit for a power tool includes a function switch which has a first battery contact, a speed control contact, a bypass contact and, a second battery contact connected in that order in a line. The function switch also has a movable contact which sequentially connects the first battery contact to the bypass contact, the speed control contact to the second battery contact, and the bypass contact to the second battery contact. A solid state switch has conduction path connecting the speed control contact to the second motor terminal wherein the conduction path is controlled in response to an oscillator signal.
摘要翻译： 一种用于电动工具的电动机控制电路包括功能开关，该功能开关具有第一电池触点，速度控制触点，旁路触点和沿着该线顺序连接的第二电池触点。 功能开关还具有将第一电池触点顺序地连接到旁路触点，到第二电池触点的速度控制触点和与第二电池触点的旁路触点的可动触点。 固态开关具有将速度控制触点连接到第二电动机端子的传导路径，其中响应于振荡器信号来控制导电路径。
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公开(公告)号：US5696871A
公开(公告)日：1997-12-09
申请号：US611052
申请日：1996-03-05
申请人： Michiaki Yama , Sachito Horiuchi
发明人： Michiaki Yama , Sachito Horiuchi
CPC分类号： H02P7/2855
摘要： A DC motor control circuit which contains a DC motor as a part of bridge resistance constituting a bridge circuit includes a first terminal connected to one end of the DC motor in the bridge circuit. A switching transistor is connected to the first terminal. A second terminal is connected to the other end of the DC motor. A switching control circuit detects an unbalanced condition of the bridge circuit via the second terminal and controls the switching period of the switching transistor so as to restore the bridge circuit to a predetermined unbalanced condition or balanced condition. A part of the bridge circuit, the switching transistor and the switching control circuit are integrated into an IC, thereby the number of terminals for the IC is reduced and a coil and an externally added capacitor both for smoothing are unnecessary.
摘要翻译： 包含作为构成桥接电路的桥电阻的一部分的直流电动机的直流电动机控制电路包括与桥式电路中的直流电动机的一端连接的第一端子。 开关晶体管连接到第一端子。 第二端子连接到直流电动机的另一端。 开关控制电路通过第二端子检测桥接电路的不平衡状态，并控制开关晶体管的开关周期，使桥接电路恢复到预定的不平衡状态或平衡状态。 桥接电路，开关晶体管和开关控制电路的一部分集成到IC中，因此IC的端子数量减少，并且不需要用于平滑的线圈和外部附加电容器。
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公开(公告)号：US5375186A
公开(公告)日：1994-12-20
申请号：US82040
申请日：1993-06-24
申请人： Gerd Schuettpelz
发明人： Gerd Schuettpelz
CPC分类号： G01P3/486 , G01P3/481 , H02P23/186 , Y10S388/901 , Y10S388/906 , Y10S388/911 , Y10S388/915
摘要： An apparatus for stabilizing the speed of a motor has a phase comparator that identifies a phase difference between a reference signal and a speed signal. The apparatus acquires the speed of the motor and generates an output signal proportional to the identified phase difference. A controller receives the output signal. A control circuit for the motor is connected to the controller. The phase comparator comprises a sample-and-hold element, a sampling pulse shaper that is connected thereto and is input with the speed signal, a pulse shaper input with the reference signal, and a signal generator connected to the output of the pulse shaper and to the input of the sample-and-hold element.
摘要翻译： 用于稳定电动机速度的装置具有识别参考信号和速度信号之间的相位差的相位比较器。 该装置获取电动机的速度并产生与所识别的相位差成比例的输出信号。 控制器接收输出信号。 用于电动机的控制电路连接到控制器。 相位比较器包括采样保持元件，连接到其上的采样脉冲整形器，并与速度信号一起输入，具有参考信号的脉冲整形器输入，以及连接到脉冲整形器的输出的信号发生器，以及 到采样保持元件的输入。
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