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    • 2. 发明申请
    • DRIVING APPARATUS OF SENSORLESS BRUSHLESS MOTOR
    • 无传感电机驱动装置
    • US20120200244A1
    • 2012-08-09
    • US13353730
    • 2012-01-19
    • Masaya OTOKAWAKoichi SAIKIKoma EIHATA
    • Masaya OTOKAWAKoichi SAIKIKoma EIHATA
    • H02P7/29
    • H02P27/085H02P6/153H02P6/182H02P6/28
    • A driving apparatus of a sensorless brushless motor includes an inverter circuit supplying a power supply voltage, of which duty ratios is variably controlled by a pulse-width modulation method, a PWM generator circuit generating a pulse-width modulation signal, a position detection circuit operating at a predetermined phase of the pulse-width modulation signal and detecting a rotational position of the rotor, and an inverter control circuit transmitting an energization control signal determined based on the pulse-width modulation signal to the inverter circuit. The PWM generator circuit provides a stepwise increase and decrease of a pulse-width modulation frequency in a normal PWM frequency, a low-speed PWM frequency, and a high-speed PWM frequency in response to an increase and decrease of one of following parameters; the commanded duty ratio, the commanded number of rotations of the motor, a detected duty ratio, and a detected number of rotations of the motor.
    • 无传感器无刷电动机的驱动装置包括:逆变器电路,其提供其脉冲宽度调制方式可变地控制占空比的电源电压;产生脉宽调制信号的PWM发生器电路;位置检测电路, 在脉冲宽度调制信号的预定相位处,检测转子的旋转位置,以及逆变器控制电路,将根据脉宽调制信号确定的通电控制信号发送到逆变器电路。 PWM发生器电路响应于以下参数中的一个的增加和减少,在正常PWM频率,低速PWM频率和高速PWM频率中逐步增加和减小脉宽调制频率; 指令占空比,电动机的指令转数,检测到的占空比和检测到的电动机的转数。
    • 5. 发明授权
    • Air-fuel ratio control system for internal combustion engines
    • 内燃机空燃比控制系统
    • US5732689A
    • 1998-03-31
    • US606382
    • 1996-02-23
    • Hiroshi OhnoKoichi SaikiYukio NodaShusuke AkazakiYoshitaka TakasukaYusuke Hasegawa
    • Hiroshi OhnoKoichi SaikiYukio NodaShusuke AkazakiYoshitaka TakasukaYusuke Hasegawa
    • F02D41/00F02D41/14F02D41/34F02D41/22
    • F02D41/008F02D41/1441F02D41/2454F02D41/2474F02B2275/18F02D41/1456F02D41/2477
    • An air-fuel ratio control system for an internal combustion engine has an air-fuel ratio sensor arranged in an exhaust passage of the engine for detecting an air-fuel ratio of exhaust gases emitted from a plurality of cylinders. An output from the air-fuel ratio sensor is sampled whenever the engine rotates through a predetermined crank angle, and sampled values of the output from the air-fuel ratio sensor are sequentially stored. An output characteristic of the air-fuel ratio sensor is detected. One of the sampled values of the output from the air-fuel ratio sensor is selected at least depending on the output characteristic of the air-fuel ratio sensor. An air-fuel ratio of a mixture supplied to each of the cylinders is estimated, separately from other ones of the cylinders, based on selected ones of the sampled values of the output from the air-fuel ratio sensor and a model representative of a behavior of the exhaust passage. The air-fuel ratio of the mixture supplied to the each of the cylinders is controlled in a feedback manner responsive to the estimated air-fuel ratio of the mixture such that the estimated air-fuel ratio of the mixture supplied to the each of the cylinders is converged to a desired air-fuel ratio.
    • 用于内燃机的空燃比控制系统具有布置在发动机的排气通道中的空燃比传感器,用于检测从多个气缸排出的废气的空燃比。 每当发动机旋转预定的曲柄角时,对空燃比传感器的输出进行采样,依次存储来自空燃比传感器的输出的采样值。 检测空燃比传感器的输出特性。 至少根据空燃比传感器的输出特性来选择空燃比传感器的输出的取样值之一。 基于来自空燃比传感器的输出的取样值和代表行为的模型中的选定的一个来估计提供给每个气缸的混合物的空燃比与其它气缸分开地估计 的排气通道。 供给到每个气缸的混合物的空燃比以响应于混合物的估计空燃比的反馈方式进行控制,使得供给到每个气缸的混合物的估计空燃比 收敛到期望的空燃比。
    • 7. 发明申请
    • DRIVING APPARATUS OF SENSORLESS BRUSHLESS MOTOR
    • 无传感电机驱动装置
    • US20120181959A1
    • 2012-07-19
    • US13352974
    • 2012-01-18
    • Masaya OTOKAWAKoma EIHATAKoichi SAIKI
    • Masaya OTOKAWAKoma EIHATAKoichi SAIKI
    • H02P6/16
    • H02P6/182H02P6/15H02P2209/07
    • A driving apparatus of a sensorless brushless motor includes an inverter circuit supplying a power supply voltage to three phase terminals of three phase armature windings of the sensorless brushless motor provided with a stator and with a rotor including a pair of magnetic poles, a PWM generator circuit generating a pulse-width modulation signal, a position detection circuit operating at a particular phase of the pulse-width modulation signal, detecting an induced voltage induced at the terminal that is in a non-energization time zone and detecting a rotational position of the rotor, an inverter control circuit determining an energization time zone and transmitting an energization control signal to the inverter circuit, and a PWM delay circuit generating a pulse-width modulation signal for position detection by delaying the pulse-width modulation signal, wherein the position detection circuit operates at a particular phase of the pulse-width modulation signal for position detection.
    • 无传感器无刷电动机的驱动装置包括向设置有定子的无传感器无刷电动机的三相电枢绕组的三相端子提供电源电压的逆变器电路和具有一对磁极的转子,PWM发电机电路 产生脉冲宽度调制信号,在脉冲宽度调制信号的特定相位工作的位置检测电路,检测在非通电时间段的端子感应出的感应电压,并检测转子的旋转位置 确定通电时间段的逆变器控制电路和向逆变器电路发送通电控制信号;以及PWM延迟电路,通过延迟脉宽调制信号产生用于位置检测的脉冲宽度调制信号,其中,位置检测电路 在脉冲宽度调制信号的特定相位进行位置检测。