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    • 22. 发明申请
    • MOTOR DRIVING APPARATUS, MOTOR DRIVING METHOD AND DISK DRIVING APPARATUS
    • 电动机驱动装置,电动机驱动方法和盘驱动装置
    • US20080018279A1
    • 2008-01-24
    • US11766884
    • 2007-06-22
    • Shingo FUKAMIZUYasunori YamamotoHideaki MoriShinichi Kuroshima
    • Shingo FUKAMIZUYasunori YamamotoHideaki MoriShinichi Kuroshima
    • H02P7/00H02P7/06
    • H02P6/182H02P6/185H02P6/22
    • A motor driving apparatus includes a virtual difference voltage detecting unit operable to detect a difference voltage between a virtual neutral point of a resistor circuit connected in parallel to motor coils and a terminal of a motor coil in non-conduction state, a rotor position detecting unit operable to detect a position of the rotor based on the difference voltage, and a controller operable to control commutation of an inverter based on the rotor position. The motor driving apparatus has a searching start mode for detecting the rotor position and energizes the coils, and a back electromotive voltage feedback mode for controlling commutation based on the back electromotive voltage. In the searching start mode, a rotor position searching process and a rotation start torque applying process are alternately performed.
    • 电动机驱动装置包括:虚拟差分电压检测单元,用于检测与电动机线圈并联连接的电阻电路的虚拟中性点与非导通状态的电动机线圈的端子之间的差分电压;转子位置检测单元 可操作以基于所述差电压检测所述转子的位置,以及控制器,其可操作以基于所述转子位置来控制逆变器的换向。 马达驱动装置具有用于检测转子位置并激励线圈的搜索启动模式,以及用于基于反电动势电压控制换向的反电动势电压反馈模式。 在搜索开始模式中,交替执行转子位置搜索处理和旋转启动转矩施加处理。
    • 23. 发明申请
    • MOTOR DRIVE DEVICE
    • 电机驱动装置
    • US20070194730A1
    • 2007-08-23
    • US11676644
    • 2007-02-20
    • Shingo FukamizuYasunori YamamotoShinichi Kuroshima
    • Shingo FukamizuYasunori YamamotoShinichi Kuroshima
    • H02P7/06
    • H02P6/182H02P6/21
    • Problems with accuracy reading position detection signal peaks and minute phase differences in the detection current make motor drive control easily susceptible to differences in motor characteristics. The rotor position is determined based on whether or not a neutral point difference voltage, which is the difference voltage between the neutral point voltage and the pseudo-neutral-point voltage when the motor phases are selectively energized, exceeds a specific threshold value. The phase energized to start the motor is determined based on this determination and the motor is energized accordingly to start. Instead of switching directly from the search step at the initial rotor position to the back-EMF voltage mode, a search and start mode that creates initial rotor speed sufficient to start the motor is executed before entering the back-EMF voltage mode.
    • 读取位置检测信号峰值和检测电流的微小相位差的问题使电机驱动控制容易受到电机特性的差异的影响。 转子位置是基于当电动机相位被选择性地通电时中性点电压和伪中性点电压之间的差分电压是否中性点差电压是否超过特定阈值来确定。 基于该确定确定启动电动机的相位,相应地启动电动机起动。 代替直接从初始转子位置处的搜索步骤切换到反电动势电压模式,在进入反电动势电压模式之前执行产生足以启动电动机的初始转子速度的搜索和启动模式。
    • 24. 发明授权
    • Stepping motor drive device and method
    • 步进电机驱动装置及方法
    • US07129671B2
    • 2006-10-31
    • US10971689
    • 2004-10-25
    • Shingo FukamizuKatsuhiro Onishi
    • Shingo FukamizuKatsuhiro Onishi
    • G05B19/40H02P8/12
    • H02P8/32
    • A reference signal generation unit 110a generates a reference signal VCA representing a limit indicator. Under the control of a PWM control unit 120a, a bridge rectification circuit 130a controls the current supplied to a coil 19a to the limit indicator, using a current chopper method. Therewith, the circuit 130a implements synchronous rectification where transistors 10 and 12 are brought into conduction when the current supply is stopped, forming a closed circuit with the coil 19a, and a regenerative current circulates in the closed circuit. During a time period when the reference signal is decreasing relatively rapidly, a SR prohibition unit 115a prohibits the transistor 10 or 12 from being brought into conduction when the current supply is stopped, and thereby the decay of regenerative current is accelerated.
    • 基准信号生成部110a生成表示极限指示符的基准信号VCA。 在PWM控制单元120a的控制下,桥式整流电路130a使用电流斩波方法将提供给线圈19a的电流控制到极限指示器。 因此,电路130a实现同步整流,其中当电流供应停止时晶体管10和12导通,与线圈21a形成闭合电路,并且再生电流在闭路中循环。 在参考信号相对快速地减小的时间段期间,当停止供电时,SR禁止单元115a禁止晶体管10或12导通,从而加速再生电流的衰减。
    • 25. 发明申请
    • Drive apparatus
    • 驱动装置
    • US20060208680A1
    • 2006-09-21
    • US11358523
    • 2006-02-21
    • Shingo FukamizuYasunori YamamotoShuji Tamaoka
    • Shingo FukamizuYasunori YamamotoShuji Tamaoka
    • G05B11/01
    • G11B7/0946G11B7/0948G11B7/0956G11B19/02
    • Optical disc drives designed for reduced power consumption switch the supply voltage in three stages between first, second, and third power supplies. The reduction in power consumption that is possible in the focusing and tracking drive circuits with three stage switching control is limited. This drive apparatus enables further reductions in power consumption. A drive output tracking signal is generated according to the drive conditions of the focusing or tracking drive circuit. The drive output tracking signal is applied to the drive circuit power supply, and the power supply is controlled according to the drive output tracking signal. A power supply change detector detects sudden changes in the drive output tracking signal, and inputs the detection signal to the DSP controlling the entire system. The DSP determines whether to improve the power supply response by comparison with predetermined conditions, and returns the result to the power supply.
    • 设计用于降低功耗的光盘驱动器将电源电压在第一,第二和第三电源之间分三级进行切换。 在具有三级切换控制的聚焦和跟踪驱动电路中可能的功耗的降低是有限的。 该驱动装置能够进一步降低功耗。 根据聚焦或跟踪驱动电路的驱动条件产生驱动输出跟踪信号。 驱动输出跟踪信号被施加到驱动电路电源,并且根据驱动输出跟踪信号来控制电源。 电源变化检测器检测驱动输出跟踪信号的突然变化,并将检测信号输入到控制整个系统的DSP。 DSP通过与预定条件相比较来确定是否改善电源响应,并将结果返回给电源。
    • 26. 发明授权
    • Stepping motor drive device and method
    • 步进电机驱动装置及方法
    • US06838853B2
    • 2005-01-04
    • US10651260
    • 2003-08-29
    • Hiroki MatsunagaShingo Fukamizu
    • Hiroki MatsunagaShingo Fukamizu
    • H02P8/12G05B19/40H02P8/18H03K7/08
    • H02P8/18G05B19/40G05B2219/41117G05B2219/42198G05B2219/42237H03K7/08
    • A reference signal generation unit integrates a staircase signal, to produce reference signal VCTA whose waveform has no abrupt changes in level and which shows a current limit value. A PWM reference signal generation unit generates a PWM reference signal. A supply current measurement unit measures a supply current to a coil. A PWM control unit compares reference signal VCTA with the measurement value of the supply current measurement unit in each period of the PWM reference signal, and sets each transistor in a bridge rectification circuit in a conducting state or a nonconducting state according to the comparison result. In this way, the supply current to the coil is controlled to approach the current limit value shown by reference signal VCTA.
    • 参考信号生成单元对阶梯信号进行积分,以产生其波形没有突然变化的参考信号VCTA,并且显示电流极限值。 PWM参考信号产生单元产生PWM参考信号。 电源电流测量单元测量线圈的电源电流。 PWM控制单元在PWM参考信号的每个周期中将参考信号VCTA与供电电流测量单元的测量值进行比较,并根据比较结果将桥式整流电路中的每个晶体管设置为导通状态或非导通状态。 以这种方式,控制到线圈的供电电流接近参考信号VCTA所示的电流极限值。