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    • 11. 发明申请
    • STATOR OF MOTOR AND MOTOR
    • 电机和电机定子
    • US20140055001A1
    • 2014-02-27
    • US14114290
    • 2012-04-18
    • Takashi OgawaYuichi YoshikawaIkuo OzakiToshiyuki TamamuraHirokazu Yamauchi
    • Takashi OgawaYuichi YoshikawaIkuo OzakiToshiyuki TamamuraHirokazu Yamauchi
    • H02K1/16
    • H02K1/165H02K1/146H02K2201/09
    • Provided is a stator of a motor which is capable of reducing a loss generated in a motor and thereby attaining a high-efficient motor, and a motor including the stator. A stator of a motor comprises a stator core (13) including a plurality of plate members (130) stacked together; the stator core (13) including: a yoke (11) of a tubular shape; and teeth (12) each of which includes an extending portion (123) extending inward in a radial direction of the yoke from the yoke (11) and an increased-width portion (122) formed at a tip end of the extending portion (123) so as to have a greater width than the extending portion (123) in a circumferential direction of the yoke; wherein the extending portion (123) has a constant-width portion (124) extending radially in a straight-line shape so as to have a constant circumferential width, a narrower portion (121) having a smaller circumferential width than the constant-width portion (124), and a clamp portion (125) for securing the plurality of plate members to each other; and wherein the clamp portion (125) is provided in the constant-width portion (124).
    • 本发明提供一种电动机的定子,其能够减少电动机中产生的损耗,从而获得高效率的电动机,以及包括该定子的电动机。 电动机的定子包括定子铁心(13),其包括堆叠在一起的多个板构件(130); 所述定子铁芯(13)包括:管状的轭(11); 和齿(12),每个齿(12)包括从轭(11)沿轭的径向向内延伸的延伸部分(123)和形成在延伸部分(123)的顶端处的增宽部分(122) ),以便在所述轭的圆周方向上具有比所述延伸部(123)更大的宽度; 其特征在于,所述延伸部(123)具有以直线状向径向延伸的恒定宽度部(124),具有恒定的周向宽度,具有比所述恒定宽度部更小的周向宽度的狭窄部(121) (124)和用于将所述多个板构件彼此固定的夹紧部分(125); 并且其中所述夹持部分(125)设置在所述恒定宽度部分(124)中。
    • 12. 发明授权
    • PWM signal output circuit
    • PWM信号输出电路
    • US08653870B2
    • 2014-02-18
    • US13617771
    • 2012-09-14
    • Takashi Ogawa
    • Takashi Ogawa
    • H03K5/04
    • H03K7/08
    • A PWM-signal-output circuit includes a first output unit to output a PWM signal with a first duty cycle, in a first period in which a motor starts rotating, a second output unit to output the PWM signal whose duty cycle increases toward a second duty cycle and decreases from the second duty cycle in a period from a logic level change in speed signal until its subsequent logic level change, in a second period following the first, the speed signal having a period corresponding to a motor-rotation speed and a logic level changing alternately, and a third output unit to output the PWM signal whose duty cycle increases toward that of the input signal and thereafter decreases from that of the input signal in a period from a logic level change in the speed signal until its subsequent logic level change, after the second period elapses.
    • PWM信号输出电路包括:第一输出单元,用于在电动机开始旋转的第一周期中输出具有第一占空比的PWM信号,第二输出单元输出其占空比向第二周期增加的PWM信号 占空比,并且从速度信号的逻辑电平变化到其随后的逻辑电平变化的期间中的第二占空比减小,在第一速度信号具有对应于电动机转速的周期的第二周期中, 逻辑电平交替变化,第三输出单元输出其占空比朝向输入信号的占空比增加的PWM信号,然后在从速度信号的逻辑电平变化到其后续逻辑的周期内从输入信号的输入信号中减去 水平变化,经过第二个时期。
    • 13. 发明授权
    • Drive control signal generating circuit
    • 驱动控制信号发生电路
    • US08648557B2
    • 2014-02-11
    • US13247050
    • 2011-09-28
    • Takashi OgawaTakahisa NakaiTsutomu Murata
    • Takashi OgawaTakahisa NakaiTsutomu Murata
    • H02K5/00
    • H02P6/085H02P6/26
    • A drive control signal generating circuit that generates a drive control signal for driving a motor includes an output control circuit that includes a flip-flop in which a state changes by a rotational state signal of the motor crossing a reference value and generates a motor drive control signal according to the state of the flip-flop, a clock generating circuit that generates a clock that defines a time of reading data in the flip-flop of the output control circuit; and a PWM conversion circuit that PWM-converts the drive control signal using the clock as a PWM signal. The clock has a frequency in which the output control circuit operates and has a duty ratio of the PWM signal.
    • 产生用于驱动电动机的驱动控制信号的驱动控制信号产生电路包括:输出控制电路,包括触发器,其中状态由电动机的旋转状态信号变化而与参考值相交,并产生电动机驱动控制 信号根据触发器的状态产生时钟产生电路,其生成定义在输出控制电路的触发器中读取数据的时间的时钟; 以及使用该时钟作为PWM信号对驱动控制信号进行PWM转换的PWM变换电路。 时钟具有输出控制电路工作的频率,并具有PWM信号的占空比。
    • 15. 发明申请
    • PWM SIGNAL OUTPUT CIRCUIT
    • PWM信号输出电路
    • US20130113401A1
    • 2013-05-09
    • US13617484
    • 2012-09-14
    • Takashi Ogawa
    • Takashi Ogawa
    • H02P6/14
    • H02P6/142H02P6/15H02P6/16H02P6/26
    • A PWM-signal-output circuit includes a detecting unit to detect time periods during which a speed signal with logic level changing alternately and having a period corresponding to a motor-rotation speed is at one and the other logic levels; a generating unit configured to, when the logic level of the speed signal changes, generate a signal to increase and thereafter decrease a current flowing through a motor coil within a first time period detected by the detecting unit, in a second time period occurring after the first time period; and a second generating unit configured to, when the first time period has elapsed after a change in the logic level of the speed signal but before a subsequent change in the logic level thereof in the second time period, generate the signal from when the first time period has elapsed until when the logic level thereof changes.
    • PWM信号输出电路包括:检测单元,用于检测具有逻辑电平交替变化并具有与电动机转速对应的周期的速度信号处于一个和另一个逻辑电平的时间段; 生成单元,其被配置为当所述速度信号的逻辑电平改变时,产生增加的信号,并且此后在由所述检测单元检测到的第一时间段内,在所述第二时间段内发生在所述第二时间段内发生的流过电动机线圈的电流, 第一时期; 以及第二生成单元,被配置为当在所述速度信号的逻辑电平改变之后但在所述第二时间段的逻辑电平的随后改变之后经过所述第一时间段时,从所述第一时间 时间已过,直到其逻辑电平变化。
    • 16. 发明申请
    • PWM SIGNAL OUTPUT CIRCUIT
    • PWM信号输出电路
    • US20130069580A1
    • 2013-03-21
    • US13618062
    • 2012-09-14
    • Takashi Ogawa
    • Takashi Ogawa
    • H02P7/06
    • H02P27/08H02P25/04H02P2209/07
    • A PWM-signal-output circuit includes a detecting unit to detect periods in which a speed signal with logic level changing alternately and having a period corresponding to a motor-rotation speed is at one and the other logic levels, a dividing unit to divide each of the periods into first to third periods; a first output unit to change a PWM-signal duty-cycle in a stepwise manner toward an input-signal duty-cycle in the first period, a second output unit to cause a PWM-signal duty-cycle to become equal to an input-signal duty-cycle, to maintain a current flowing through the motor coil constant, in the second period; and a third output unit to change a PWM-signal duty-cycle in a stepwise manner from an input-signal duty-cycle, to decrease a current flowing through the motor coil, in the third period.
    • PWM信号输出电路包括:检测单元,用于检测具有逻辑电平交替变化并且具有与电机转速对应的周期的速度信号处于一个和另一个逻辑电平的周期;划分单元,用于将每个 的期间进入第一至第三期; 第一输出单元,用于在第一周期中以逐步的方式向输入信号占空比改变PWM信号占空比;第二输出单元,用于使PWM信号占空比变得等于输入 - 信号占空比,在第二时段内保持电流通过电机线圈的电流恒定; 以及第三输出单元,用于在第三时段中从输入信号占空比逐步地改变PWM信号占空比,以减少流过电动机线圈的电流。
    • 19. 发明授权
    • Driver circuit
    • 驱动电路
    • US08283885B2
    • 2012-10-09
    • US12821547
    • 2010-06-23
    • Takashi OgawaTsutomu Murata
    • Takashi OgawaTsutomu Murata
    • H02P5/40H02P7/00
    • H02P8/34
    • 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.
    • 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。