公开(公告)号：US10084400B2

公开(公告)日：2018-09-25

申请号：US15266936

申请日：2016-09-15

Applicant: Renesas Electronics Corporation

Inventor： Minoru Kurosawa ,  Kichiya Itagaki

IPC: H02P6/18 ,  H02P21/22 ,  G11B19/20 ,  H02P27/08 ,  H02P6/182

CPC classification number: H02P6/182 ,  G11B19/20 ,  G11B19/2054 ,  G11B19/2072 ,  H02P21/22 ,  H02P27/08

Abstract: The phase of a drive current of a motor is optimized. The phase arithmetic unit PHCAL calculates a drive voltage phase θdrv to converge the phase difference between the reference voltage phase θbemf and the reference current phase θi to zero based on a prescribed arithmetic expression. The phase correction unit PHCP determines the phase θdrvR after the correction by adding a correction value to the phase θdrv, and the magnitude of the correction value is updated by a feedback control so as to converge to a prescribed value the phase difference between the reference voltage phase θbemf and the reference current phase θi which are inputted. A PWM controller shifts an energization control timing synchronized with the reference voltage phase θbemf based on the corrected phase θdrvR, and generates the PWM signal for controlling the drive voltage to a sine wave shape.

公开(公告)号：US09503011B2

公开(公告)日：2016-11-22

申请号：US14946671

申请日：2015-11-19

Applicant: Renesas Electronics Corporation

Inventor： Minoru Kurosawa ,  Kichiya Itagaki ,  Seigi Ishiji

IPC: H02P1/30 ,  H02P23/00 ,  H02P29/00

CPC classification number: H02P23/0077 ,  H02P6/10 ,  H02P29/00 ,  H02P29/50

Abstract: The present invention is intended to reduce noise and vibration of a motor. A first duty correction circuit generates a first corrected duty instruction value which changes with an increment same as an increment of a duty instruction value and in which an offset value as a constant is reflected. A second duty correction circuit generates a second corrected duty instruction value which changes with an increment different from an increment of the duty instruction value. A selector outputs, as the corrected duty instruction value, either one of the first corrected duty instruction value and the second corrected duty instruction value in accordance with a magnitude relation between the duty instruction value and a duty reference value.

Abstract translation: 本发明旨在减少电动机的噪声和振动。 第一占空比校正电路产生第一校正占空指令值，其以与占空指令值的增量相同的增量变化，并且其中反映作为常数的偏移值。 第二占空比校正电路产生以与占空指令值的增量不同的增量改变的第二校正占空比指令值。 A选择器根据占空指令值和占空比基准值之间的大小关系，输出第一校正占空指令值和第二校正占空指令值中的任何一个作为校正占空指令值。

公开(公告)号：US09496814B2

公开(公告)日：2016-11-15

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.

公开(公告)号：US11444557B2

公开(公告)日：2022-09-13

申请号：US17148402

申请日：2021-01-13

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Seigi Ishiji ,  Minoru Kurosawa

IPC: H02P6/182 ,  H02P6/28 ,  H02P6/18 ,  H02M7/5387

Abstract: A gate drive semiconductor device includes: external terminals to which PWM control signals are supplied; external terminals outputting a drive signal for driving a three-phase BLDC motor; external terminals to which the counter electromotive voltage generated by driving the three-phase BLDC motor is supplied; a zero-cross determination unit generating an interrupt signal indicating timing at which the counter electromotive voltage intersects with a midpoint potential of the three-phase BLDC motor based on the PWM control signal and the counter electromotive voltage; and an external terminal outputting the interrupt signal.

公开(公告)号：US10581364B2

公开(公告)日：2020-03-03

申请号：US16189183

申请日：2018-11-13

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Minoru Kurosawa ,  Kichiya Itagaki

IPC: H02P6/182 ,  H02P7/29 ,  H02P27/08 ,  G11B19/20 ,  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.

公开(公告)号：US10199963B2

公开(公告)日：2019-02-05

申请号：US15816702

申请日：2017-11-17

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Minoru Kurosawa ,  Kichiya Itagaki

IPC: H02K29/06 ,  H02P6/10 ,  H02P6/08 ,  H02P6/15 ,  H02P6/182 ,  H02P27/14

Abstract: A motor driving device and a motor system that can reduce a torque ripple of a motor are provided. The current control loop detects a drive current of the motor, detects an error between the detected value of the drive current and a current indication value as a target value of the drive current, and determines the duty of the PWM signal reflecting the error concerned. The back EMF phase detector detects the phase of a back electromotive force of each phase in the motor. The torque correction unit calculates a first torque correction coefficient of a periodic function based on the phase variations in the three phases of the back electromotive force, and corrects the current indication value superimposing the first torque correction coefficient on the current indication value.

公开(公告)号：US10784801B2

公开(公告)日：2020-09-22

申请号：US16400946

申请日：2019-05-01

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Minoru Kurosawa ,  Kichiya Itagaki

IPC: H02P6/182 ,  H02P21/22 ,  H02K5/24

Abstract: The phase error detection unit PHED detects the phase error PERR between the phase of the BEMF and the phase of the phase switching signal COMM (masking signal MSK) at each of a plurality of detection timings that become the zero crossing timings of the BEMF in the mechanical angular cycle. The PI compensator PICPa has a plurality of cycle setting registers REGN 0_0 to REGN 3_5 for each of a plurality of detection timings, and while switching the registers for each detection timing, the PI compensator determines the cycle setting value NCNTS for bringing the inputted phase error PERR close to zero by reflecting the previous cycle setting value NCNT stored in the register. The clock generation unit CGEN sequentially controls the phase switching signal COMM based on the cycle setting value NCNTS.

公开(公告)号：US10348220B2

公开(公告)日：2019-07-09

申请号：US16004494

申请日：2018-06-11

Applicant: Renesas Electronics Corporation

Inventor： Minoru Kurosawa ,  Seigi Ishiji

IPC: G11B19/20 ,  H02P3/12 ,  H02P7/025 ,  H02P7/293 ,  H02P29/68 ,  H02P7/29 ,  G11B19/28 ,  G11B5/54 ,  G11B15/46

Abstract: A PWM modulation circuit controls low-side transistors of three phases to all be in an ON state when a brake current flows; controls, in a period in which a brake current flows in a first direction in one phase, a transistor for sensing in that one phase to be in an ON state; and controls, in a period in which a brake current flows in the first direction in two phases, transistors for three phases to be in an OFF state. When the brake current is to flow, sense-phase control circuits for the three phases control a transistor for sensing, in a phase in which the brake current flows in a sink direction, to be into an ON state, and controls the transistor for sensing in a phase in which the brake current flows in an opposite direction, to be into an OFF state.

公开(公告)号：US09178462B2

公开(公告)日：2015-11-03

申请号：US14087237

申请日：2013-11-22

Applicant: Renesas Electronics Corporation

Inventor： Minoru Kurosawa ,  Kenji Yoshida ,  Osamu Yamashita

IPC: G05B23/02 ,  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。

公开(公告)号：US08816626B2

公开(公告)日：2014-08-26

申请号：US13755467

申请日：2013-01-31

Applicant: Renesas Electronics Corporation

Inventor： Minoru Kurosawa

IPC: H02P1/00

CPC classification number: H02P6/002 ,  H02P6/182 ,  H02P6/20 ,  H02P6/28

Abstract: Motor Drive Control Device configured to properly start up various types of motors under operating conditions where motor operations are performed in a wide range of temperature and power supply voltage, includes output drive controllers that supply PWM drive output signals to an 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.

Abstract translation: 电机驱动控制装置，配置为在各种温度和电源电压范围内执行电动机运行的运行条件下正确启动各种类型的电动机，包括输出驱动控制器，将PWM驱动输出信号提供给输出预驱动器 以最小化当前指令信号和当前检测数字信号之间的误差的方式。 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，并执行PWM驱动以提供电机的初始加速度。