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1. 发明申请

US20120200244A1 DRIVING APPARATUS OF SENSORLESS BRUSHLESS MOTOR 审中-公开
标题翻译：无传感电机驱动装置
公开(公告)号：US20120200244A1
公开(公告)日：2012-08-09
申请号：US13353730
申请日：2012-01-19
申请人： Masaya OTOKAWA , Koichi SAIKI , Koma EIHATA
发明人： Masaya OTOKAWA , Koichi SAIKI , Koma EIHATA
IPC分类号： H02P7/29
CPC分类号： H02P27/085 , H02P6/153 , H02P6/182 , H02P6/28
摘要： 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.
摘要翻译：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。

2. 发明申请

US20120181959A1 DRIVING APPARATUS OF SENSORLESS BRUSHLESS MOTOR 审中-公开
标题翻译：无传感电机驱动装置
公开(公告)号：US20120181959A1
公开(公告)日：2012-07-19
申请号：US13352974
申请日：2012-01-18
申请人： Masaya OTOKAWA , Koma EIHATA , Koichi SAIKI
发明人： Masaya OTOKAWA , Koma EIHATA , Koichi SAIKI
IPC分类号： H02P6/16
CPC分类号： H02P6/182 , H02P6/15 , H02P2209/07
摘要： 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.
摘要翻译：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。

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