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公开(公告)号：US20140203751A1
公开(公告)日：2014-07-24
申请号：US14087237
申请日：2013-11-22
Applicant: Renesas Electronics Corporation
Inventor： Minoru KUROSAWA , Kenji YOSHIDA , Osamu YAMASHITA
IPC: H02P25/02
CPC classification number: H02P25/028 , H02P25/034
Abstract: A motor driver controller including a difference control section; a driver output section; a drive current detection amplifier; and a load short-circuit detection circuit. A motor and sensing resistor is coupled in series and coupled to an output terminal of the driver output section. The difference control section generates a drive voltage command signal in response to a drive current command value and a drive current detection signal. The driver output section drives the motor and sensing resistor, in response to the drive voltage command signal, and a drive current detection amplifier generates a signal fed to the difference control section, in response to a drive current of the sensing resistor. The load short-circuit detection circuit detects an abnormal oscillation waveform signal caused by a short-circuit state between the both ends of the motor.
Abstract translation: 一种电机驱动器控制器，包括差分控制部分; 驱动器输出部分; 驱动电流检测放大器; 和负载短路检测电路。 电动机和感测电阻器串联耦合并耦合到驱动器输出部分的输出端子。 差分控制部分根据驱动电流指令值和驱动电流检测信号产生驱动电压指令信号。 响应于驱动电压指令信号，驱动器输出部驱动电动机和感测电阻，并且驱动电流检测放大器响应于感测电阻器的驱动电流产生馈送到差分控制部分的信号。 负载短路检测电路检测由电动机的两端之间的短路状态引起的异常振荡波形信号。
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2.发明申请公开(公告)号：US20180096704A1
公开(公告)日：2018-04-05
申请号：US15717035
申请日：2017-09-27
Applicant: Renesas Electronics Corporation
Inventor： Minoru KUROSAWA , Kichiya ITAGAKI , Seigi ISHIJI
CPC classification number: G11B19/2063 , G11B5/54 , G11B19/04 , G11B19/2081 , G11B21/02 , G11B21/12
Abstract: A control device is provided which can perform a retraction operation of a head included in a disk storage device with lower power consumption.The control device of the disk storage device includes a control unit that controls a motor and retracts the head from over a disk to a ramp mechanism when power supply is shut down, an acquisition unit that acquires information related to a moving distance of the head that retracts to the ramp mechanism, and a calculation unit that calculates the moving distance of the head based on the information acquired by the acquisition unit. The control unit switches an operation of the motor from a first retract operation to a second retract operation when determining that the head reaches a first position after passing through an inclined surface of the ramp mechanism based on the moving distance calculated by the calculation unit.
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3.发明申请公开(公告)号：US20140084889A1
公开(公告)日：2014-03-27
申请号：US14030055
申请日：2013-09-18
Applicant: Renesas Electronics Corporation
Inventor： Hiroshi KUROIWA , Osamu YAMASHITA , Masahiro ISHIHARA , Minoru KUROSAWA
IPC: H02M3/157
CPC classification number: H02M3/157 , H02M3/158 , H02M2001/009
Abstract: A power supply device is responsive to load changes. The power supply device includes a switch control circuit, a charge control circuit, and a discharge control circuit. The switch control circuit controls switches so that electrical power is charged into an inductor, discharged from the inductor, and distributed to first and second capacitors in a time-division manner based on a switching cycle. The charge control circuit controls the amount of electrical power to be charged into the inductor based on a first amount of error between a first output power supply voltage and its target value and a second amount of error between a second output power supply voltage and its target value. The discharge control circuit controls a distribution ratio at which the electrical power discharged from the inductor is distributed to the first and second capacitors based on the ratio between the first and second amounts of error.
Abstract translation: 电源设备响应负载变化。 电源装置包括开关控制电路，充电控制电路和放电控制电路。 开关控制电路控制开关，使得电力从电感器放电到电感器中，并且基于开关周期以时分方式分配给第一和第二电容器。 充电控制电路基于第一输出电源电压与其目标值之间的第一误差误差和第二输出电源电压与其目标之间的第二误差量来控制要充入电感器的电力量 值。 放电控制电路基于第一误差量和第二误差量之比来控制从电感器放电的电力分配给第一和第二电容器的分配比。
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公开(公告)号：US20130193899A1
公开(公告)日：2013-08-01
申请号：US13755467
申请日：2013-01-31
Applicant: RENESAS ELECTRONICS CORPORATION
Inventor： Minoru KUROSAWA
IPC: H02P21/00
Abstract: The present invention properly starts up various types of motors under operating conditions where motor operations are performed in a wide range of temperature and power supply voltage. Output drive controllers supply PWM drive output signals to the output pre-driver in such a manner as to minimize the error between a current instruction signal and a current detection digital signal. In response to a detected induced voltage generated from a voltage detector upon startup of a motor, an initial acceleration controller supplies initial acceleration output signals specifying a conducting phase for initial acceleration of the motor to the output drive controllers. The initial acceleration controller, the output drive controllers, and an output driver make a conducting phase change and perform a PWM drive to provide the initial acceleration of the motor in response to the detected induced voltage and to an error upon startup of the motor. Upper-limit duty values for the PWM drive output signals to be supplied from the output drive controllers to the output pre-driver during the period of the initial acceleration can be arbitrarily set in the output drive controllers.
Abstract translation: 本发明在电动机操作在宽范围的温度和电源电压下进行的操作条件下适当启动各种类型的电动机。 输出驱动控制器以这样的方式将PWM驱动输出信号提供给输出预驱动器，以使当前指令信号和电流检测数字信号之间的误差最小化。 响应于在电动机启动时从电压检测器产生的检测到的感应电压，初始加速度控制器向初始加速度输出信号提供指定电动机的初始加速的导通相位到输出驱动控制器的初始加速度输出信号。 初始加速度控制器，输出驱动控制器和输出驱动器进行导通相位改变，并且执行PWM驱动以响应于检测到的感应电压和启动电动机时的误差来提供电动机的初始加速度。 可以在输出驱动控制器中任意设定在初始加速期间从输出驱动控制器向输出预驱动器供给的PWM驱动输出信号的上限值。
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公开(公告)号：US20190199265A1
公开(公告)日：2019-06-27
申请号：US16189183
申请日：2018-11-13
Applicant: RENESAS ELECTRONICS CORPORATION
Inventor： Minoru KUROSAWA , Kichiya ITAGAKI
IPC: H02P27/08 , G11B19/20 , H02P6/182 , H02M7/5387
Abstract: An output control unit controls a drive terminal for a BEMF detection object phase to a high-impedance state in a mask term. A BEMF detection unit detects a voltage of the drive terminal for the detection object phase when a center tap voltage is set as a reference as BEMF in a PWM on-term for remaining two phases per PWM period in the mask term and asserts a zero-crossing signal when the voltage is reduced to zero. A PWM fixing unit fixes the remaining two phases to the PWM on-terms in a first term from a predetermined timing after an amplitude level of BEMF becomes smaller than a BEMF threshold amplitude to assertion of the zero-crossing signal. The BEMF detection unit continuously detects BEMF in the first term.
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Patent Agency Ranking
公开(公告)号：US20190006964A1
公开(公告)日：2019-01-03
申请号：US16004494
申请日：2018-06-11
Applicant: Renesas Electronics Corporation
Inventor： Minoru KUROSAWA , Seigi ISHIJI
CPC classification number: H02P3/12 , G11B5/54 , G11B15/46 , G11B19/2009 , G11B19/28 , H02P3/22 , H02P6/24 , H02P7/025 , H02P7/29 , H02P7/293 , H02P29/68 , H02P2205/01
Abstract: A PWM modulation circuit controls low-side transistors of three phases (u, v, and w) all to be into an ON state, when a brake current flows, controls, in a period in which a brake current flows in one phase, a transistor for sensing (u, v, and w) of this one phase to be into an ON state, and controls, in a period of two phases, the transistor for sensing (u, v, and w) of three phases to be into an OFF state. When the brake current is to flow, sense-phase control circuits of three phases controls a transistor for sensing (u, v, and w), in a phase in which the brake current is in a sink direction, to be into an ON state, and controls the transistor for sensing (u, v, and w) in a phase in which it is in an opposite direction, to be into an OFF state.
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公开(公告)号：US20180083557A1
公开(公告)日：2018-03-22
申请号：US15674685
申请日：2017-08-11
Applicant: Renesas Electronics Corporation
Inventor： Minoru KUROSAWA , Kichiya ITAGAKI , Yusuke YASUMA
CPC classification number: H02P6/10 , G11B19/2009 , G11B19/28 , H02P6/157 , H02P6/182
Abstract: There are provided a motor drive device and a motor system that can reduce the torque ripple of a motor. An SPM drive unit includes a plurality of high side transistors and low side transistors coupled to drive terminals of multiple phases respectively, and applies drive voltages to the drive terminals, using a PWM signal. A back electromotive force voltage phase detection unit detects each of back electromotive force voltage phases of the multiple phases. A drive voltage phase generation unit determines one of drive voltage phases in each of the multiple phases at the time of applying the drive voltages so that each of drive current phases of the multiple phases has a phase variation opposite in direction and equal to each of relative phase variations of the back electromotive force voltage phases of the multiple phases.
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公开(公告)号：US20150123576A1
公开(公告)日：2015-05-07
申请号：US14597385
申请日：2015-01-15
Applicant: RENESAS ELECTRONICS CORPORATION
Inventor： Minoru KUROSAWA , Yuki MATSUYA
IPC: H02P25/02
CPC classification number: H02P25/028 , G11B5/5534 , H02P25/034
Abstract: When a motor drive control device is integrated in a semiconductor integrated circuit having a small chip area, calibration for improving the accuracy of detection of a counter electromotive voltage, which is for detecting the speed of a motor, is enabled. A first multiplier performs multiplication between a drive current detection signal and first gain information in a first register. A subtractor performs subtraction between a drive voltage command signal and a first multiplication result in the first multiplier. A second multiplier performs multiplication between a subtraction result in the subtractor and second gain information in a second register to generate counter electromotive voltage information as information on a second multiplication result. The drive voltage command signal in a control unit is set to a predetermined value to generate a condition which maintains the speed of the motor and a counter electromotive voltage at substantially zero.
Abstract translation: 当电动机驱动控制装置集成在具有小芯片面积的半导体集成电路中时，能够提高用于检测电动机速度的反电动势电压的检测精度的校准。 第一乘法器在第一寄存器中执行驱动电流检测信号和第一增益信息之间的乘法。 减法器在第一乘法器中执行驱动电压命令信号和第一相乘结果之间的减法。 第二乘法器在减法器的减法结果和第二寄存器中的第二增益信息之间进行乘法，以产生作为关于第二乘法结果的信息的反电动势电压信息。 控制单元中的驱动电压指令信号被设置为预定值，以产生维持电动机的速度和基本为零的反电动势的条件。
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公开(公告)号：US20230238902A1
公开(公告)日：2023-07-27
申请号：US18089281
申请日：2022-12-27
Applicant: Renesas Electronics Corporation
Inventor： Minoru KUROSAWA , Satoshi NARUMI , Takeshi OHTSUKI
IPC: H02P6/18
CPC classification number: H02P6/186
Abstract: The semiconductor device includes: a current detection circuit configured to detect a current flowing through a three-phase motor by driving of a drive circuit; and a controller configured to control the drive circuit, based on the detected current. The controller is configured to control, when the three-phase motor is stationary, an energization pattern in such a way that a wave detection current sequentially flows from the drive circuit to each phase of the three-phase motor, to obtain, from the wave detection current detected by the current detection circuit, a first, a second and a third interphase current differences, each of which is a difference among wave detection currents flowing in directions opposite to one another, to determine the energization pattern based on a magnitude relationship among the first, the second and the third interphase current differences.
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公开(公告)号：US20220103100A1
公开(公告)日：2022-03-31
申请号：US17479185
申请日：2021-09-20
Applicant: RENESAS ELECTRONICS CORPORATION
Inventor： Satoshi NARUMI , Minoru KUROSAWA , Takeshi OHTSUKI
Abstract: The magnetic pole position of the rotor is estimated with high accuracy at the initial start of a three-phase motor of the sensorless system. Semiconductor device for driving and controlling the three-phase motor of the sensorless system have a detector connected to the three-phase output nodes of the inverter circuit and the virtual neutral point (or neutral point), and detecting a voltage generated in the output node of the non-energized phase of the three-phase. Controller applies the initial drive voltage by the inverter circuit to any two phases of the three-phase motor based on the estimated position of the magnetic pole of the rotor in the stop state. Controller estimates the position of the rotor based on a difference voltage detected by the detector in a driving voltage applying period and a regeneration period immediately after or immediately before the driving voltage applying period.
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