-
1.发明授权Automatic adjustment of commutation delay for brushless DC motor for improved efficiency 失效自动调整无刷直流电机的换向延迟，提高效率
公开(公告)号：US5285135A
公开(公告)日：1994-02-08
申请号：US949732
申请日：1992-09-23
摘要： A circuit and method are provided for automatically adjusting a commutation delay from events indicating a position of a polyphase dc motor. The circuit includes a driver to supply drive current to selected stator coils of said motor. A sequencer is connected to control the driver to apply drive current to selected motor coils to rotate the motor. Motor position detecting circuitry is connected to detect the events indicating the position of the motor. A commutation delay circuit is connected to increment the sequencer in response to the detection of the events indicating the position of the motor detected by the motor position detecting circuitry. A circuit for adjusting the delay of said commutation delay circuit between each event and each sequencer commutation provides optimum motor commutation for maximum power efficiency.According to the method, drive current is supplied to selected stator coils of said motor in predetermined commutated sequences to rotate the motor. Events are detected indicating the position of the motor, and the delay between each position indicating event and each commutation sequence is automatically adjusted to provide optimum motor commutation for maximum power efficiency.
摘要翻译： 提供一种电路和方法，用于根据指示多相直流电动机的位置的事件自动调整换向延迟。 电路包括驱动器，用于向所述电动机的选定的定子线圈提供驱动电流。 连接定序器以控制驱动器，以将驱动电流施加到所选择的电动机线圈以使电动机旋转。 电机位置检测电路被连接以检测指示电机位置的事件。 连接换向延迟电路以响应于检测到由电动机位置检测电路检测到的电动机的位置的事件的检测来增加定序器。 用于调整每个事件和每个定序器换向之间的所述换向延迟电路的延迟的电路为最大功率效率提供最佳的电机换向。 根据该方法，以预定的整流顺序将驱动电流提供给所述电动机的选定定子线圈，以使电动机旋转。 检测到指示电机的位置的事件，并且自动调整每个位置指示事件和每个换向顺序之间的延迟，以提供最佳的电动机换向以实现最大功率效率。
-
公开(公告)号：US5306988A
公开(公告)日：1994-04-26
申请号：US770577
申请日：1991-10-03
摘要： A circuit for operating a polyphase dc motor, for example of the type having a plurality of "Y" connected stator coils, has circuitry for unambiguously determining the actual instantaneous position of the rotor of the motor, circuitry for determining a desired rotor position precedent to executing a desired commutation sequence, and circuitry for executing the desired commutation sequence when the circuit for determining the actual instantaneous position of the rotor detects that the rotor is actually in the desired rotor position. The circuitry for unambiguously determining the actual instantaneous position of the rotor includes a back emf amplifier switchably connected to at least one floating coil, and circuitry for determining when the voltage received by the back emf amplifier crosses a reference voltage from a predetermined direction. In one embodiment, the circuit, includes mask circuitry for inhibiting the reference voltage crossing detection circuitry for a predetermined time after a change in the commutation sequence. The mask circuitry includes clocked up and first and second down counters, the second down counter being inhibited to be clocked until the first down counter has reached a predetermined count, and the reference voltage crossing circuitry being inhibited until at least the second down counter has completed its count. When a reference voltage crossing is detected, the count of the up counter is loaded into both the first and second down counters, then the up counter is reset to begin a new commutation period count.
摘要翻译： 用于操作多相直流电动机的电路，例如具有多个“Y”个连接的定子线圈的类型的电路具有用于明确地确定电动机的转子的实际瞬时位置的电路，用于确定期望的转子位置先例的电路 执行期望的换向序列，以及用于当用于确定转子的实际瞬时位置的电路检测到转子实际上处于期望的转子位置时执行所需换向序列的电路。 用于明确地确定转子的实际瞬时位置的电路包括可切换地连接到至少一个浮动线圈的反电动势放大器，以及用于确定由反电动势放大器接收的电压何时从预定方向穿过参考电压的电路。 在一个实施例中，电路包括用于在换向序列改变之后的预定时间内禁止参考电压交叉检测电路的掩模电路。 掩模电路包括时钟提供和第一和第二下计数器，第二向下计数器被禁止被计时直到第一递减计数器达到预定计数，并且参考电压交叉电路被禁止，直到至少第二递减计数器已经完成 它的数量。 当检测到参考电压交叉时，向上计数器的计数被加载到第一和第二递减计数器中，然后上升计数器被复位以开始新的换向周期计数。
-
3.发明授权Automatic adjustment of commutation delay for brushless DC motor for improved efficiency 失效自动调整无刷直流电机的换向延迟，提高效率
公开(公告)号：US5428276A
公开(公告)日：1995-06-27
申请号：US186662
申请日：1994-01-24
摘要： A circuit and method are provided for automatically adjusting a commutation delay from events indicating a position of a polyphase dc motor. The circuit includes a driver to supply drive current to selected stator coils of said motor. A sequencer is connected to control the driver to apply drive current to selected motor coils to rotate the motor. Motor position detecting circuitry is connected to detect the events indicating the position of the motor. A commutation delay circuit is connected to increment the sequencer in response to the detection of the events indicating the position of the motor detected by the motor position detecting circuitry. A circuit for adjusting the delay of said commutation delay circuit between each event and each sequencer commutation provides optimum motor commutation for maximum power efficiency.According to the method, drive current is supplied to selected stator coils of said motor in predetermined commutated sequences to rotate the motor. Events are detected indicating the position of the motor, and the delay between each position indicating event and each commutation sequence is automatically adjusted to provide optimum motor commutation for maximum power efficiency.
摘要翻译： 提供一种电路和方法，用于根据指示多相直流电动机的位置的事件自动调整换向延迟。 电路包括驱动器，用于向所述电动机的选定的定子线圈提供驱动电流。 连接定序器以控制驱动器，以将驱动电流施加到所选择的电动机线圈以使电动机旋转。 电机位置检测电路被连接以检测指示电机位置的事件。 连接换向延迟电路以响应于检测到由电动机位置检测电路检测到的电动机的位置的事件的检测来增加定序器。 用于调整每个事件和每个定序器换向之间的所述换向延迟电路的延迟的电路为最大功率效率提供最佳的电机换向。 根据该方法，以预定的整流顺序将驱动电流提供给所述电动机的选定定子线圈，以使电动机旋转。 检测到指示电机的位置的事件，并且自动调整每个位置指示事件和每个换向顺序之间的延迟，以提供最佳的电动机换向以实现最大功率效率。
-
4.发明授权Method and apparatus for determining reverse rotation of a polyphase DC motor 失效用于确定多相直流电动机的反向旋转的方法和装置
公开(公告)号：US5512805A
公开(公告)日：1996-04-30
申请号：US218466
申请日：1994-03-28
摘要： A circuit for operating a polyphase dc motor that has a plurality of driving coils has circuitry for receiving the back emf of at least one of the driving coils at a time when the at least one of the driving coils is in a floating state prior to the desired commutation sequence. Circuitry is provided for determining an anticipated direction the back emf will cross a reference voltage based upon the desired commutation sequence. And circuitry is also provided for determining if the back emf received by the circuitry for receiving the back emf crosses a reference voltage from other than the anticipated direction.In addition, a method for operating a polyphase dc motor having a plurality of driving coils includes determining the actual instantaneous position of the rotor of the motor by determining when the back emf of at least one coil at a time when the at least one coil is in a floating state prior to the desired commutation sequence crosses a reference voltage from a predetermined direction. A desired rotor position precedent to executing a desired commutation sequence is determined, and the desired commutation sequence is executed when the circuit for determining the actual instantaneous position of the rotor detects that the rotor is actually in the desired rotor position. A signal is generated if the back emf of the at least one coil in a floating state crosses the reference voltage from other than the predetermined direction.
摘要翻译： 用于操作具有多个驱动线圈的多相直流电动机的电路具有用于在至少一个驱动线圈处于浮动状态之前接收至少一个驱动线圈的反电动势的电路， 所需换向序列。 电路被提供用于基于期望的换向序列确定反电动势将跨越参考电压的预期方向。 并且还提供电路以确定由用于接收反电动势的电路接收的反电动势是否与预期方向以外的参考电压相交。 另外，一种用于操作具有多个驱动线圈的多相直流电动机的方法包括通过确定当至少一个线圈是至少一个线圈时至少一个线圈的反电动势时，确定电机的转子的实际瞬时位置 在期望的换向序列之前的浮置状态从预定方向穿过参考电压。 确定执行期望的换向序列的期望的转子位置，并且当用于确定转子的实际瞬时位置的电路检测到转子实际上处于期望的转子位置时，执行期望的换向顺序。 如果浮置状态下的至少一个线圈的反电动势与预定方向以外的参考电压相交，则产生信号。
-
5.发明授权Amplifier and method for detecting the bemf of a coil of a polyphase sensorless DC motor 失效用于检测多相无传感器直流电动机的线圈的放大器和方法
公开(公告)号：US5481167A
公开(公告)日：1996-01-02
申请号：US236668
申请日：1994-05-02
CPC分类号： H02P6/182
摘要： A circuit and method for detecting when the back emf of a motor coil passes a predetermined level includes circuitry for providing a voltage proportional to the back emf of the motor coil, and circuitry for providing a voltage proportional to a reference potential. A first bias voltage is added to the voltage proportional to the back emf to produce a first added voltage, and a second bias voltage is added to the reference potential when the back emf of the motor coil is expected to change in a predetermined direction to produce a second added voltage. A comparator produces an output change when the first added voltage becomes larger than the second added voltage at the predetermined level.
摘要翻译： 用于检测电动机线圈的反电动势何时通过预定水平的电路和方法包括用于提供与电动机线圈的反电动势成比例的电压的电路以及用于提供与参考电位成比例的电压的电路。 将第一偏置电压加到与反电动势成正比的电压上以产生第一相加电压，并且当预期电动机线圈的反电动势预期沿预定方向变化时，将第二偏置电压加到参考电位上 第二加电压。 当第一加法电压变得大于预定电平的第二加法电压时，比较器产生输出变化。
-
公开(公告)号：US5349521A
公开(公告)日：1994-09-20
申请号：US981819
申请日：1992-11-25
申请人： Paolo Menegoli , Mark E. Rohrbaugh
发明人： Paolo Menegoli , Mark E. Rohrbaugh
摘要： A full wave rectifier includes an amplifier having a minus input, a plus input and an amplifier output; an input resistor connected between a circuit input and the minus input; and a current bridge having an output terminal connected to the circuit output, a first terminal connected to the minus input and a second terminal connected to the amplifier output. The current bridge includes a first current mirror circuit and a second current mirror circuit. The first current mirror circuit includes a first current source and a second current source, a source end of each current source of the first and second current sources being connected to the first terminal, a drain end of the first current source being connected to the second terminal and a drain end of the second current source being connected to the output terminal. The second current mirror circuit includes a third current source and fourth current source, a source end of each current source of the third and fourth current sources being connected to the second terminal, a drain end of the third current source being connected to the first terminal and a drain end of the fourth current source being connected to the output terminal.
摘要翻译： 全波整流器包括具有负输入，正输入和放大器输出的放大器; 连接在电路输入和负输入之间的输入电阻; 以及具有连接到电路输出的输出端的电流桥，连接到负输入的第一端和连接到放大器输出的第二端。 电流桥包括第一电流镜电路和第二电流镜电路。 第一电流镜电路包括第一电流源和第二电流源，第一和第二电流源的每个电流源的源极端连接到第一端子，第一电流源的漏极端连接到第二电流源 端子和第二电流源的漏极端连接到输出端子。 第二电流镜电路包括第三电流源和第四电流源，第三和第四电流源的每个电流源的源极端连接到第二端子，第三电流源的漏极端连接到第一端子 并且第四电流源的漏极端连接到输出端子。
-
公开(公告)号：US5477171A
公开(公告)日：1995-12-19
申请号：US271043
申请日：1994-07-06
申请人： Paolo Menegoli , Mark E. Rohrbaugh
发明人： Paolo Menegoli , Mark E. Rohrbaugh
摘要： A full wave rectifier includes an amplifier having a minus input, a plus input and an amplifier output; an input resistor connected between a circuit input and the minus input; and a current bridge having an output terminal connected to the circuit output, a first terminal connected to the minus input and a second terminal connected to the amplifier output. The current bridge includes a first current mirror circuit and a second current mirror circuit. The first current mirror circuit includes a first current source and a second current source, a source end of each current source of the first and second current sources being connected to the first terminal, a drain end of the first current source being connected to the second terminal and a drain end of the second current source being connected to the output terminal. The second current mirror circuit includes a third current source and fourth current source, a source end of each current source of the third and fourth current sources being connected to the second terminal, a drain end of the third current source being connected to the first terminal and a drain end of the fourth current source being connected to the output terminal.
摘要翻译： 全波整流器包括具有负输入，正输入和放大器输出的放大器; 连接在电路输入和负输入之间的输入电阻; 以及具有连接到电路输出的输出端的电流桥，连接到负输入的第一端和连接到放大器输出的第二端。 电流桥包括第一电流镜电路和第二电流镜电路。 第一电流镜电路包括第一电流源和第二电流源，第一和第二电流源的每个电流源的源极端连接到第一端子，第一电流源的漏极端连接到第二电流源 端子和第二电流源的漏极端连接到输出端子。 第二电流镜电路包括第三电流源和第四电流源，第三和第四电流源的每个电流源的源极端连接到第二端子，第三电流源的漏极端连接到第一端子 并且第四电流源的漏极端连接到输出端子。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.019 秒)
