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    • 13. 发明授权
    • Stationary position detection circuit and motor drive circuit
    • 固定位置检测电路和电机驱动电路
    • US07176677B2
    • 2007-02-13
    • US11476052
    • 2006-06-28
    • Satoshi NarumiMasaharu HoashiToshiya SuzukiDaisuke SuetsuguHikaru Nakamura
    • Satoshi NarumiMasaharu HoashiToshiya SuzukiDaisuke SuetsuguHikaru Nakamura
    • G01B7/30G05D3/00
    • G01D5/208
    • A stationary position detection circuit and a motor drive circuit capable of more properly detecting the rotor position are disclosed. The stationary position detection circuit supplies an alternating current to each phase load of the motor. The time during which the current flows in a first direction and the time during which the current flows in a second direction opposite to the first direction are converted into electrical signals and amplified. In accordance with the value of the electrical signals, the position of the motor rotor in stationary mode is determined. The use of the alternating current, unlike the kickback voltage, makes it possible to improve the detection accuracy by amplifying the electrical signals with an increased number of alternations. An increased number of alternations can amplify the electrical signals without increasing the value of the alternating current, and therefore, unlike in the case of the kickback voltage, the alternating current of a large value is not required. As a result, the alternating current can be reduced to a small value and the vibration can be suppressed.
    • 公开了能够更适当地检测转子位置的静止位置检测电路和电动机驱动电路。 静止位置检测电路向电机的各相负载提供交流电。 电流沿第一方向流动的时间和电流沿与第一方向相反的第二方向流动的时间被转换成电信号并被放大。 根据电信号的值,确定电机转子在静止模式下的位置。 与反冲电压不同,使用交流电可以通过以增加的交替次数放大电信号来提高检测精度。 增加的交替数量可以放大电信号而不增加交流电流的值,因此与反冲电压不同,不需要大值的交流电。 结果,可以将交流电流减小到较小的值,并且可以抑制振动。
    • 17. 发明申请
    • STATIONARY POSITION DETECTION CIRCUIT AND MOTOR DRIVE CIRCUIT
    • 静态位置检测电路和电机驱动电路
    • US20070001669A1
    • 2007-01-04
    • US11476052
    • 2006-06-28
    • Satoshi NarumiMasaharu HoashiToshiya SuzukiDaisuke SuetsuguHikaru Nakamura
    • Satoshi NarumiMasaharu HoashiToshiya SuzukiDaisuke SuetsuguHikaru Nakamura
    • G01B7/30
    • G01D5/208
    • A stationary position detection circuit and a motor drive circuit capable of more properly detecting the rotor position are disclosed. The stationary position detection circuit supplies an alternating current to each phase load of the motor. The time during which the current flows in a first direction and the time during which the current flows in a second direction opposite to the first direction are converted into electrical signals and amplified. In accordance with the value of the electrical signals, the position of the motor rotor in stationary mode is determined. The use of the alternating current, unlike the kickback voltage, makes it possible to improve the detection accuracy by amplifying the electrical signals with an increased number of alternations. An increased number of alternations can amplify the electrical signals without increasing the value of the alternating current, and therefore, unlike in the case of the kickback voltage, the alternating current of a large value is not required. As a result, the alternating current can be reduced to a small value and the vibration can be suppressed.
    • 公开了能够更适当地检测转子位置的静止位置检测电路和电动机驱动电路。 静止位置检测电路向电机的各相负载提供交流电。 电流沿第一方向流动的时间和电流沿与第一方向相反的第二方向流动的时间被转换成电信号并被放大。 根据电信号的值,确定电机转子在静止模式下的位置。 与反冲电压不同,使用交流电可以通过以增加的交替次数放大电信号来提高检测精度。 增加的交替数量可以放大电信号而不增加交流电流的值,因此与反冲电压不同,不需要大值的交流电。 结果,可以将交流电流减小到较小的值,并且可以抑制振动。
    • 19. 发明申请
    • NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY
    • 用于锂离子二次电池和锂离子二次电池的负极
    • US20110250501A1
    • 2011-10-13
    • US13140706
    • 2010-09-27
    • Noriyuki UchidaNoriaki AmoDaisuke Suetsugu
    • Noriyuki UchidaNoriaki AmoDaisuke Suetsugu
    • H01M4/70
    • H01M4/134H01M4/1395H01M4/70H01M10/052
    • A lithium ion secondary having a high capacity in which decrease in the cycle characteristics is suppressed is provided by reducing cracks formed by repetition of charge and discharge. A negative electrode for a lithium ion secondary battery, including: a current collector sheet and a negative electrode active material layer supported on the current collector sheet; the current collector sheet including protruding portions arranged according to a regular pattern and flat portions existing between the protruding portions, wherein the negative electrode active material layer includes columnar bodies having a roughly spindle shape supported on the protruding portions, and bumps supported on the flat portions, the columnar bodies and the bumps are composed of an alloy-based negative electrode active material, the bumps have a height lower than a height of a position in which the columnar bodies adjacent to each other are the closest to each other, and in a vertical cross section made by supposedly cutting from a supposed straight line passing through each center of two adjacent columnar bodies and a center of the bump sandwiched between the columnar bodies toward a surface of the current collector sheet, a sectional area of the bump accounts for 25% or more, on average, of a sectional area of a space defined by a line segment connecting positions in which the two adjacent columnar bodies are the closest to each other, a surface of the flat portion, and two side surfaces of the two columnar bodies.
    • 通过减少重复充放电形成的裂纹,提供了具有抑制循环特性降低的高容量的锂离子二次电池。 一种锂离子二次电池用负极,其特征在于,包括:集电体片和负极活性物质层,其负载在所述集电体片上; 所述集电体片包括根据规则图案布置的突出部分和存在于所述突出部分之间的平坦部分,其中所述负极活性物质层包括支撑在所述突出部分上的具有大致心轴形状的柱状体,以及支撑在所述平坦部分上的凸起 柱状体和凸起由合金系负极活性物质构成,凸块的高度比彼此相邻的柱状体最靠近的位置的高度低, 通过假设从通过两个相邻柱状体的每个中心的直线切割而制成的垂直横截面和夹在柱状体之间的凸块的中心朝向集电体片的表面,该凸起的截面积为25 平均来说,由连接w位置的线段限定的空间的截面面积的平均百分比 两个相邻的柱状体彼此最接近,平坦部分的表面和两个柱状体的两个侧表面。