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公开(公告)号：US09853478B2
公开(公告)日：2017-12-26
申请号：US13030045
申请日：2011-02-17
摘要： Exemplary embodiments are directed to detection and validation of wirelessly chargeable devices positioned within a charging region of a wireless power transmitter. A device may include a wireless power transmitter configured detect a change in at least one parameter at the transmitter. The transmitter may further be configured to determine whether at least one valid chargeable device is positioned within a charging region of the transmitter upon detecting the change in the at least one parameter.
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公开(公告)号：US20120025624A1
公开(公告)日：2012-02-02
申请号：US13030045
申请日：2011-02-17
IPC分类号： H01F38/14
摘要： Exemplary embodiments are directed to detection and validation of wirelessly chargeable devices positioned within a charging region of a wireless power transmitter. A device may include a wireless power transmitter configured detect a change in at least one parameter at the transmitter. The transmitter may further be configured to determine whether at least one valid chargeable device is positioned within a charging region of the transmitter upon detecting the change in the at least one parameter.
摘要翻译： 示例性实施例涉及位于无线功率发射器的充电区域内的无线可充电装置的检测和验证。 设备可以包括配置的无线电力发射器，其检测发射机处的至少一个参数的变化。 发射机还可以被配置为在检测到至少一个参数的变化时，确定至少一个有效可收费设备是否位于发射机的充电区域内。
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公开(公告)号：US10523276B2
公开(公告)日：2019-12-31
申请号：US13450369
申请日：2012-04-18
摘要： Systems, methods and apparatus are disclosed for wireless power transfer using multiple receive coils. In one aspect a wireless power receiver is provided that is configured to receive wireless power from a wireless power transmit coil. The wireless power receiver includes a first receive coil having a first mutual coupling with the transmit coil. The wireless power receiver further includes a second receive coil having a second mutual coupling with the transmit coil. The wireless power receiver further includes a load coupled to at least one of the first receive coil and the second receive coil for receiving the wireless power.
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公开(公告)号：US08928284B2
公开(公告)日：2015-01-06
申请号：US12850538
申请日：2010-08-04
CPC分类号： H02J7/025 , H02J17/00 , H02J50/80 , H04B5/0037
摘要： Exemplary embodiments are directed to variable power wireless power transmission. A method may include conveying wireless power to a device at a first power level during a time period. The method may further include conveying wireless power to one or more other devices at a second, different power level during another time period.
摘要翻译： 示例性实施例涉及可变功率无线电力传输。 一种方法可以包括在一段时间内以无线电力向第一功率电平传送无线电力。 该方法还可以包括在另一时间段期间以第二不同功率电平向一个或多个其他设备传送无线电力。
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公开(公告)号：US5859511A
公开(公告)日：1999-01-12
申请号：US723713
申请日：1996-09-27
CPC分类号： H02P6/14 , H03K17/063 , H03K17/163
摘要： A circuit for operating a polyphase DC motor, such as the type having a plurality of "Y" connected stator coils, has circuitry for charging the coils at a rate which will reduce EMI and other noise, while maintaining an acceptable charge rate. The gate of a selected high side driving transistor is charged at a relatively high rate during a ramping phase. During the ramping phase, the gates of the selected transistor is charged to a voltage near the voltage needed to form a channel in the transistor for conduction. After the ramping phase, the gates are charged at a lesser rate in order to control the rate of charging of the stator coils to prevent noise.
摘要翻译： 用于操作多相DC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以一定速率对线圈充电的电路，该速率将降低EMI和其它噪声，同时保持可接受的充电速率。 选择的高侧驱动晶体管的栅极在斜坡阶段以相对较高的速率充电。 在斜坡相位期间，所选择的晶体管的栅极被充电到靠近在晶体管中形成用于导通的沟道所需的电压的电压。 在斜坡阶段之后，为了控制定子线圈的充电速率以防止噪声，门以较小的速率充电。
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6.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。
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7.发明授权Method and apparatus for Kelvin current sensing in a multi-phase driver for a polyphase DC motor 失效用于多相直流电机的多相驱动器中的开尔文电流检测方法和装置
公开(公告)号：US5495154A
公开(公告)日：1996-02-27
申请号：US54615
申请日：1993-04-29
CPC分类号： H02P6/28
摘要： A kelvin current sensing circuit in an integrated control circuit that controls the current flowing through the driving coils of a polyphase DC motor. The invention provides for adjusting the voltage to the lower driver transistors of the control circuit by having the kelvin current sensing occur internally within the chip. A ground compatible differential amplifier circuit is used in one embodiment. Each of the lower transistors are connected to the base of respective PNP transistors, the emitters of which being connected together to control one side of the differential amplifier. A control voltage is applied to the other side of the differential amplifier. The output of a comparator, that is connected to the differential amplifier, is used to control the operation of the lower driver transistors. Therefore all of the sensing is done internally in the semiconductor chip. The voltages are taken at the source of each of the lower transistors. This eliminates the parasitic resistances associated with the connection between the transistors and the sense resistor attached externally to the device. Since the kelvin current sensing is done internally, the pin which connected the inverting input of the comparator to the sensing resistor has been eliminated.
摘要翻译： 集成控制电路中的开尔文电流感测电路，其控制流过多相直流电动机的驱动线圈的电流。 本发明提供了通过在芯片内部发生开尔文电流感测来调节控制电路的下驱动晶体管的电压。 在一个实施例中使用地面兼容的差分放大器电路。 每个下部晶体管连接到相应PNP晶体管的基极，各个PNP晶体管的发射极连接在一起以控制差分放大器的一侧。 控制电压施加到差分放大器的另一侧。 连接到差分放大器的比较器的输出用于控制下驱动晶体管的工作。 因此，所有的感测都是在半导体芯片内部完成的。 在每个下部晶体管的源极处获取电压。 这消除了与晶体管之间的连接和连接到器件外部的检测电阻相关联的寄生电阻。 由于开尔文电流检测是在内部完成的，所以将比较器的反相输入端连接到检测电阻器的引脚已被消除。
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8.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。
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公开(公告)号：US5450520A
公开(公告)日：1995-09-12
申请号：US203519
申请日：1994-02-28
CPC分类号： G01R19/0023
摘要： A circuit for sensing the current delivered to a load, or multiple loads, such presented by a polyphase DC motor, without significantly dissipating the energy delivered to the load, has a predriver circuit and a power delivery circuit for each load. The predriver circuit is connected in a series path between a voltage source and a control element of the power delivery circuit, and the power delivery circuit is connected between a connection node and a respective one of the loads. A sensing element is connected in a series path between the source of voltage and the power delivery circuit connection node. In a preferred embodiment, the sensing element is a resistor, the predriver circuit is a PNP transistor, and the power delivery circuit is an NPN transistor. The PNP and NPN transistors are connected to form a pseudo-Darlington transistor pair, with the collectors of the NPN transistors interconnected to enable a single sense resistor to be used to sense the current in each of the loads.
摘要翻译： 用于感测传送到负载的电流或由多相直流电动机呈现的多个负载而不显着消耗传递给负载的能量的电路具有用于每个负载的预驱动电路和功率输送电路。 预驱动电路连接在电源和电力输送电路的控制元件之间的串联路径中，并且电力输送电路连接在连接节点和相应负载之间。 感测元件连接在电压源和电力输送电路连接节点之间的串联路径中。 在优选实施例中，感测元件是电阻器，预驱动电路是PNP晶体管，并且功率输出电路是NPN晶体管。 PNP和NPN晶体管被连接以形成伪达林顿晶体管对，NPN晶体管的集电极被互连，以使得能够使用单个检测电阻来感测每个负载中的电流。
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10.发明授权Initialization circuit for automatically establishing an output to zero or desired reference potential 失效用于自动建立输出为零或所需参考电位的初始化电路
公开(公告)号：US5376834A
公开(公告)日：1994-12-27
申请号：US26986
申请日：1993-03-05
CPC分类号： G05F1/46
摘要： A circuit for initializing the output voltage of an analog circuit includes a switch operative to connect an input of the analog circuit to a first reference potential during an initializing period. A comparator is connected to compare the output voltage of the analog circuit with a second reference potential to produce an output representing the comparison. A resistor ladder having a plurality of voltage step output lines along its length is connected to inputs of a multiplexer, the multiplexer having an output connected to bias the analog circuit. A counter having a clock input and a count output is connected with the count output connected to operate the multiplexer to sequentially select among the steps of the resistor ladder. A circuit clocks the counter until the output of the comparator reaches a predetermined value, wherein a voltage step output line of the resistor ladder is selected to control the output of the multiplexer.
摘要翻译： 用于初始化模拟电路的输出电压的电路包括开关，其操作以在初始化期间将模拟电路的输入连接到第一参考电位。 连接比较器以将模拟电路的输出电压与第二参考电位进行比较，以产生表示比较的输出。 具有沿其长度的多个电压阶跃输出线的电阻梯连接到多路复用器的输入端，所述多路复用器具有连接以偏置模拟电路的输出。 具有时钟输入和计数输出的计数器与连接的计数输出连接以操作多路复用器以在电阻梯的步骤中顺序选择。 A电路对计数器进行计时直到比较器的输出达到预定值，其中选择电阻梯的电压阶跃输出线来控制多路复用器的输出。
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