公开(公告)号：US08531139B2

公开(公告)日：2013-09-10

申请号：US13107059

申请日：2011-05-13

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02K33/00

CPC分类号： H02P3/10 ,  H02P25/032

摘要： In a drive control circuit of a linear vibration motor, a differential amplifier circuit includes an operational amplifier in which an P-channel type transistor is used as a transistor that receives an input voltage, and the differential amplifier circuit detects an induced voltage occurring in a coil. Before the H-bridge circuit is controlled to a high impedance state, a drive signal generating unit turns on a first transistor and a second transistor, and delivers a regenerative current through the coil, the first transistor, the second transistor and the power supply potential.

摘要翻译： 在线性振动电动机的驱动控制电路中，差分放大电路包括运算放大器，其中使用P沟道型晶体管作为接收输入电压的晶体管，差分放大电路检测在 线圈 在H桥电路被控制到高阻抗状态之前，驱动信号生成单元接通第一晶体管和第二晶体管，并且通过线圈，第一晶体管，第二晶体管和电源电位传递再生电流 。

公开(公告)号：US08519645B2

公开(公告)日：2013-08-27

申请号：US13013263

申请日：2011-01-25

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02P1/00

CPC分类号： H02P25/027 ,  H02P25/028 ,  H02P25/032 ,  H02P25/034

摘要： A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. The drive signal is such that nonconducting periods are set before and after a positive current conducting period and the nonconducting periods are set before and after a negative current conducting period. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and then supplies the drive current to the coil. The drive signal generating unit sets the width of a nonconducting period such that, after the drive start of the linear vibration motor, the width of a nonconducting period to be set before at least the first conducting period of the drive signal is shorter than the width of a nonconducting period to be set before each conducting period during steady operation of the linear vibration motor.

摘要翻译： 驱动信号生成单元生成用于交替地向线圈传送正电流和负电流的驱动信号。 驱动信号使得在正电流导通时段之前和之后设置非导通周期，并且在负电流导通周期之前和之后设置非导通周期。 驱动器单元响应于由驱动信号产生单元产生的驱动信号产生驱动电流，然后将驱动电流提供给线圈。 驱动信号发生单元设定非导通周期的宽度，使得在线性振动马达的驱动启动之后，至少在驱动信号的第一导通周期之前要设置的非导通周期的宽度比宽度 在线性振动电动机的稳定运行期间在每个传导期间之前设定的非导通时段。

公开(公告)号：US20130002180A1

公开(公告)日：2013-01-03

申请号：US13523450

申请日：2012-06-14

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02P6/14

CPC分类号： H02P31/00 ,  H02P6/182 ,  H02P6/26

摘要： A driving circuit for a single-phase-brushless motor includes a driving-signal-generating circuit to generate a driving signal for supplying, to a driving coil of the single-phase-brushless motor, first- and second-driving currents alternately with a de-energized period therebetween, an output circuit, and a zero-cross-detecting circuit. While measuring a driving cycle from a start of an energized period, during which the output circuit supplies the first- or the second-driving current to the driving coil, to a time when the zero-cross-detecting circuit detects a zero cross of an induced voltage, generated across the driving coil, during the de-energized period, the driving-signal-generating circuit determines a length of a subsequent energized period based on the measured driving cycle, when the zero-cross-detecting circuit detects the zero-cross, and the driving-signal-generating circuit determines a length of an immediately previous energized period as a length of a subsequent energized period, when the zero-cross-detecting circuit does not detect the zero-cross.

摘要翻译： 用于单相无刷电动机的驱动电路包括：驱动信号发生电路，用于产生用于向单相无刷电动机的驱动线圈提供第一和第二驱动电流的驱动信号， 断电期间，输出电路和零交叉检测电路。 在从通电期间开始测量驱动周期期间，输出电路将第一或第二驱动电流提供给驱动线圈，直到零交叉检测电路检测到零交叉检测电路的零交叉 在去激励期间，在驱动线圈两端产生的感应电压，驱动信号发生电路基于测量的驱动周期来确定随后的通电时段的长度，当零交叉检测电路检测到零时， 并且当零交叉检测电路未检测到零交叉时，驱动信号发生电路将紧接在前的通电时段的长度确定为随后的通电时段的长度。

公开(公告)号：US08283885B2

公开(公告)日：2012-10-09

申请号：US12821547

申请日：2010-06-23

申请人： Takashi Ogawa ,  Tsutomu Murata

发明人： Takashi Ogawa ,  Tsutomu Murata

IPC分类号： H02P5/40 ,  H02P7/00

CPC分类号： H02P8/34

摘要： A drive control signal is effectively obtained. An offset control circuit (32) adds an offset to a rotational state signal. An added signal is obtained by adding an offset to the rotational state signal by repeating a process in which, when it is detected that an added signal in which a predetermined offset amount is added to the rotational state signal on a side approaching a reference value becomes the reference value from one direction at a first time, the offset amount is added to the rotational state signal in a direction returning from the reference value, when it is detected that the obtained added signal becomes the reference value from the one direction at a second time, no value is added to the signal, and, when it is detected that the added signal becomes the reference value at a first time from another direction which is a direction opposite to the one direction and which reaches the reference value, the offset amount is added to the rotational state signal on a side approaching the reference value. A drive control signal is generated in which the level is reduced compared to the sine wave shape signal for a predetermined period of the obtained added signal between the reference value at the second time and a reference value at a next time.

摘要翻译： 有效地获得驱动控制信号。 偏移控制电路（32）将偏移量加到旋转状态信号上。 通过重复一个处理来获得附加的信号，该处理是当检测到在接近参考值的一侧将与旋转状态信号相加的预定偏移量的附加信号变为 从第一次的一个方向的参考值，当从所述参考值返回的方向上将所述偏移量加到所述旋转状态信号中，当检测到所获得的相加信号在一秒钟内从所述一个方向变为参考值时 时间，不向信号添加值，并且当检测到相加信号在第一时间从作为与该一个方向相反的方向的另一方向成为参考值并且达到参考值时，偏移量 被添加到接近参考值的一侧的旋转状态信号。 产生驱动控制信号，其中在所获得的相加信号的预定时间段的第二时间的参考值和下一个参考值之间，与正弦波形状信号相比，电平被减小。

公开(公告)号：US20120081049A1

公开(公告)日：2012-04-05

申请号：US13247050

申请日：2011-09-28

申请人： Takashi Ogawa ,  Takahisa Nakai ,  Tsutomu Murata

发明人： Takashi Ogawa ,  Takahisa Nakai ,  Tsutomu Murata

IPC分类号： H02P6/08

CPC分类号： H02P6/085 ,  H02P6/26

摘要： PWM conversion is efficiently executed. An output control circuit comprises a flip-flop which reads crossing of a reference value by a rotational state signal from a motor, and generates a motor drive control signal according to a state of the flip-flop. A clock generator generates a clock which defines a time of reading data in the flip-flop of the output control circuit. A PWM conversion circuit PWM-converts the drive control signal using the clock as a PWM signal.

摘要翻译： PWM转换有效执行。 输出控制电路包括触发器，其触发参考值与来自电动机的旋转状态信号的交叉，并根据触发器的状态生成电动机驱动控制信号。 时钟发生器产生定义在输出控制电路的触发器中读取数据的时间的时钟。 PWM转换电路使用时钟作为PWM信号对驱动控制信号进行PWM转换。

公开(公告)号：US09319777B2

公开(公告)日：2016-04-19

申请号：US13228156

申请日：2011-09-08

申请人： Daisuke Aoki ,  Tsutomu Murata

发明人： Daisuke Aoki ,  Tsutomu Murata

IPC分类号： H04R3/00 ,  H04R29/00 ,  H04R9/02 ,  H04R9/10

CPC分类号： H04R3/00 ,  H04R9/025 ,  H04R9/10 ,  H04R2400/01

摘要： A drive signal generating unit generates a drive signal having a cyclic waveform containing a zero period in a vibration mode. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit so as to supply the drive current to a voice coil. An induced voltage detector detects the induced voltage occurring in the voice coil during a nonconducting period. A zero-cross detector detects the zero cross of the induced voltage detected by the induced voltage detector. The drive signal generating unit estimates the eigen-frequency of a vibration speaker from a detected position of the zero cross and brings the frequency of the drive signal close to the estimated eigen-frequency.

摘要翻译： 驱动信号生成单元生成在振动模式中具有包含零周期的循环波形的驱动信号。 驱动器单元响应于由驱动信号产生单元产生的驱动信号产生驱动电流，以将驱动电流提供给音圈。 感应电压检测器检测在非传导期间在音圈中发生的感应电压。 零交叉检测器检测由感应电压检测器检测到的感应电压的零交叉。 驱动信号生成单元从检测到的零交叉位置估计振动扬声器的本征频率，并使驱动信号的频率接近估计的本征频率。

公开(公告)号：US08736201B2

公开(公告)日：2014-05-27

申请号：US13107320

申请日：2011-05-13

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02K33/00

CPC分类号： H02P3/10 ,  H02P25/032

摘要： In a drive control circuit of a linear vibration motor, a drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. An induced voltage detector detects an induced voltage occurring in the coil. After a running of the linear vibration motor has terminated, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. The induced voltage detector detects the induced voltage occurring in the coil during the high impedance period.

摘要翻译： 在线性振动电动机的驱动控制电路中，驱动信号生成单元生成用于交替地向线圈递送正电流和负电流的驱动信号。 驱动器单元响应于由驱动信号产生单元产生的驱动信号产生驱动电流，并将驱动电流提供给线圈。 感应电压检测器检测线圈中产生的感应电压。 在线性振动电动机的运转结束之后，驱动信号生成部生成与电动机运转时产生的驱动信号相反的驱动信号， 该相位相的驱动信号包括驱动器单元被控制到高阻抗状态的高阻抗周期。 感应电压检测器在高阻抗时段期间检测线圈中产生的感应电压。

公开(公告)号：US08698431B2

公开(公告)日：2014-04-15

申请号：US13012577

申请日：2011-01-24

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02P1/00

CPC分类号： H02P3/20 ,  H02P25/032 ,  H02P25/034

摘要： A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. After the drive termination of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to the phase of the drive signal generated during the motor running. The driver unit quickens the stop of the linear vibration motor by supplying to the coil the drive current of opposite phase according to the drive signal of opposite phase.

摘要翻译： 驱动信号生成单元生成用于交替地向线圈传送正电流和负电流的驱动信号。 驱动器单元响应于由驱动信号产生单元产生的驱动信号产生驱动电流，并将驱动电流提供给线圈。 在线性振动电动机的驱动终止之后，驱动信号产生单元产生与电动机运行期间产生的驱动信号的相位相反的驱动信号。 驱动单元根据相位驱动信号，向线圈供给反相驱动电流，加快线性振动电机的停止。

公开(公告)号：US08692494B2

公开(公告)日：2014-04-08

申请号：US13523450

申请日：2012-06-14

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02P6/00 ,  H02P6/18 ,  H02P7/00

CPC分类号： H02P31/00 ,  H02P6/182 ,  H02P6/26

摘要： A driving circuit for a single-phase-brushless motor includes a driving-signal-generating circuit to generate a driving signal for supplying, to a driving coil of the single-phase-brushless motor, first- and second-driving currents alternately with a de-energized period therebetween, an output circuit, and a zero-cross-detecting circuit. While measuring a driving cycle from a start of an energized period, during which the output circuit supplies the first- or the second-driving current to the driving coil, to a time when the zero-cross-detecting circuit detects a zero cross of an induced voltage, generated across the driving coil, during the de-energized period, the driving-signal-generating circuit determines a length of a subsequent energized period based on the measured driving cycle, when the zero-cross-detecting circuit detects the zero-cross, and the driving-signal-generating circuit determines a length of an immediately previous energized period as a length of a subsequent energized period, when the zero-cross-detecting circuit does not detect the zero-cross.

摘要翻译： 用于单相无刷电动机的驱动电路包括：驱动信号发生电路，用于产生用于向单相无刷电动机的驱动线圈提供第一和第二驱动电流的驱动信号， 断电期间，输出电路和零交叉检测电路。 在从通电期间开始测量驱动周期期间，输出电路将第一或第二驱动电流提供给驱动线圈，直到零交叉检测电路检测到零交叉检测电路的零交叉 在去激励期间，在驱动线圈两端产生的感应电压，驱动信号发生电路基于测量的驱动周期来确定随后的通电时段的长度，当零交叉检测电路检测到零时， 并且当零交叉检测电路未检测到零交叉时，驱动信号发生电路将紧接在前的通电时段的长度确定为随后的通电时段的长度。

公开(公告)号：US08547048B2

公开(公告)日：2013-10-01

申请号：US13013234

申请日：2011-01-25

申请人： Tsutomu Murata

发明人： Tsutomu Murata

IPC分类号： H02K33/16

CPC分类号： H02P25/034

摘要： A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil with a nonconducting period inserted between conducting periods. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to a coil. The drive signal generating unit estimates the eigen frequency of a linear vibration motor based on a detected position of the zero cross occurring in the coil during the nonconducting period, and the frequency of the drive signal is brought close to the estimated eigen frequency. The zero-cross detecting unit sets a detection window for avoiding the detection of zero cross of voltages other than the induced voltage. The zero-cross detecting unit enables a zero cross detected within the detection window and disables a zero cross detected outside the detection window.

摘要翻译： 驱动信号生成单元生成用于交替地将正电流和负电流递送到线圈的驱动信号，该线圈具有插入导通周期之间的非导通时段。 驱动器单元响应于由驱动信号生成单元产生的驱动信号产生驱动电流，并将驱动电流提供给线圈。 驱动信号生成单元基于在非导通时段期间在线圈中发生的零交叉的检测位置来估计线性振动电动机的本征频率，并且使驱动信号的频率接近估计的本征频率。 零交叉检测单元设置用于避免检测除感应电压以外的电压的零交叉的检测窗口。 零交叉检测单元使得能够在检测窗口内检测到零交叉，并禁止在检测窗口外部检测到零交叉。