公开(公告)号：US5646491A

公开(公告)日：1997-07-08

申请号：US439580

申请日：1995-05-11

申请人： David M. Erdman ,  James A. Beatty

发明人： David M. Erdman ,  James A. Beatty

IPC分类号： H02P6/18 ,  H02P7/00

CPC分类号： H02P6/182

摘要： A motor having a differential phase back EMF sensing circuit for sensing rotor position includes a stationary assembly with at least three windings. The rotation of the rotor induces a back EMF in the windings. A control circuit energizes each of the windings with a current according to a preselected sequence. A switch network is coupled to the windings and provides two back EMF signals as a function of the back EMF induced in two of the windings when the control circuit is energizing the third winding. A signal processor is coupled to the switch network and produces a difference signal representative of a difference between the two back EMF signals. An integrator integrates the difference signal to produce an integrated difference signal. The motor includes a reference signal generator which produces a reference signal and a comparator which produces a trigger signal when the integrated difference signal exceeds the reference signal. The motor also includes a one shot which produces a position signal as a function of the trigger signal and a position counter which produces a position count signal as a function of the position signal. The control circuit energizes each of the windings according to the preselected sequence as a function of the position count signal. Other circuits and methods control the motor. The trigger signal may be generated in response to a zero crossing detector and timer.

摘要翻译： 具有用于感测转子位置的差分反相EMF感测电路的电动机包括具有至少三个绕组的固定组件。 转子的旋转引起绕组中的反电动势。 控制电路根据预先选择的顺序用电流使每个绕组通电。 当控制电路对第三绕组通电时，开关网络耦合到绕组并提供两个反向EMF信号作为在两个绕组中感应的反电动势的函数。 信号处理器耦合到开关网络并产生表示两个反电动势信号之间的差的差信号。 积分器积分差分信号以产生积分差分信号。 电动机包括产生参考信号的参考信号发生器和当积分差分信号超过参考信号时产生触发信号的比较器。 电动机还包括一次，其产生作为触发信号的函数的位置信号，以及产生作为位置信号的函数的位置计数信号的位置计数器。 控制电路根据作为位置计数信号的函数的预选顺序使每个绕组通电。 其他电路和方法控制电机。 可以响应于过零检测器和定时器产生触发信号。

公开(公告)号：US5473497A

公开(公告)日：1995-12-05

申请号：US14327

申请日：1993-02-05

申请人： James A. Beatty

发明人： James A. Beatty

IPC分类号： H02H3/42 ,  H02H7/08 ,  H02H7/00

CPC分类号： H02H7/0827 ,  H02H7/0833 ,  H02H3/42

摘要： A device for measuring energy delivered by a motor to a load is adapted to be connected to the motor which is coupled to the load and connected to a power source through first and second power supply lines. The device includes a line voltage sensing circuit for sensing the voltage across the power supply lines, a line current sensing circuit for sensing the current flowing through the motor and a pulse width modulator which modulates the sensed voltage to produce a pulse width modulated first electrical signal. The device also includes a first switch, responsive to the pulse width modulated first electrical signal which modulates an output of the line current sensing circuit to produce a power waveform and an integrator which integrates the power waveform to produce an output signal indicative of the energy delivered by the motor to the load. The device further includes a switch controller which compares the output signal to a first reference signal to detect the existence of an overload condition and which compares the output signal to a second reference signal to detect the existence of an underload condition. The switch controller opens a second switch to disconnect the motor from the power source in response to either an overload condition or an underload condition.

摘要翻译： 用于测量由电动机传递到负载的能量的装置适于连接到电动机，该电动机耦合到负载并通过第一和第二电源线连接到电源。 该装置包括用于感测电源线两端的电压的线路电压检测电路，用于感测流过电动机的电流的线路电流检测电路和调制所感测的电压以产生脉宽调制的第一电信号的脉宽调制器 。 该装置还包括第一开关，响应脉冲宽度调制的第一电信号，其对线路电流检测电路的输出进行调制以产生功率波形;积分器，其对功率波形进行积分，以产生指示所输送能量的输出信号 由电机到负载。 该装置还包括开关控制器，其将输出信号与第一参考信号进行比较以检测过载状况的存在，并将输出信号与第二参考信号进行比较以检测欠载状况的存在。 开关控制器响应于过载状况或欠载状况，打开第二个开关以断开电动机与电源的连接。

公开(公告)号：USD253095S

公开(公告)日：1979-10-09

申请号：US759026

申请日：1977-01-13

申请人： James A. Beatty

设计人： James A. Beatty

公开(公告)号：US5023527A

公开(公告)日：1991-06-11

申请号：US515317

申请日：1990-04-18

申请人： David M. Erdman ,  James A. Beatty ,  Amritlal H. Patel

发明人： David M. Erdman ,  James A. Beatty ,  Amritlal H. Patel

IPC分类号： B60H1/32 ,  F23N3/08 ,  F25B49/02 ,  G05D23/19 ,  H02K29/06 ,  H02K29/10 ,  H02P6/08 ,  H02P6/14 ,  H02P6/16 ,  H02P6/18

CPC分类号： F23N3/082 ,  F25B49/025 ,  G05D23/19 ,  H02K29/06 ,  H02K29/10 ,  H02P6/085 ,  H02P6/14 ,  H02P6/16 ,  H02P6/182 ,  F23N2033/04 ,  F25B2600/021

摘要： Control circuit for an electronically commutated motor which has a rotatable assembly and further has a stationary assembly with a plurality of winding stages having terminals for energization, and switches for applying a voltage to one or more of the terminals of the winding stages at a time and commutating the winding stages in a preselected sequence to rotate the rotatable assembly. A preselected sequence of winding stages are left correspondingly unpowered so that a plurality of the winding stages are unpowered at some time. The winding stages generate back emf signals and also couple electrical signals from each energized winding stage to the unpowered winding stages which signals can interfere with detection of back emf for position sensing purposes. The control circuit includes a first circuit for selecting at least two of the unpowered winding stages which have electrical signals coupled to them that have a predetermined relationship in polarity and magnitude. A second circuit produces an electrical output from the voltages on the winding stage terminals of the winding stages selected, so that the electrical signals coupled from each energized winding stage are substantially canceled when they have the predetermined relationship while the back emf is preserved for position sensing substantially free from interference from the electrical signals that are coupled from each energized winding stage to the unpowered winding stages. Other control circuits, electronically commutated motor systems and methods of control and operation are also disclosed.

摘要翻译： 一种用于电子换向电动机的控制电路，其具有可旋转的组件，并且还具有具有多个具有用于通电的端子的绕组的静止组件，以及用于一次向一个或多个绕组的端子施加电压的开关，以及 以预选顺序对绕组段进行换向以旋转可旋转组件。 卷绕级的预选序列相应地没有动力，使得多个绕组段在某些时间没有动力。 绕组级产生反电动势信号，并且将来自每个带电绕组级的电信号耦合到无动力绕组级，这些信号可能干扰用于位置感测目的的反电动势的检测。 控制电路包括用于选择具有与其相连的电信号的至少两个未供电的绕组级的第一电路，其具有极性和大小的预定关系。 第二电路从所选择的绕组级的绕组级端子上的电压产生电输出，使得当它们具有预定关系时，从每个通电的绕组段耦合的电信号被基本上消除，同时保留用于位置感测的后电动势 基本上不受来自从每个带电绕组段耦合到无动力绕组级的电信号的干扰。 还公开了其他控制电路，电子换向电机系统以及控制和操作方法。