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1. 发明授权

US06528968B2 Brushless-motor driver in PWM mode 有权
标题翻译： PWM模式下的无刷电机驱动器
公开(公告)号：US06528968B2
公开(公告)日：2003-03-04
申请号：US10094250
申请日：2002-03-08
申请人： Toshiaki Seima , Yoshiaki Iwayama
发明人： Toshiaki Seima , Yoshiaki Iwayama
IPC分类号： H02P540
CPC分类号： H02P6/085
摘要： In a driver of a brushless motor performing synchronous rectification PWM operation, switching is performed at an arbitrary timing between a synchronous rectification PWM operation and one-way PWM operation to prevent a negative current for the power supply, and thus preventing increase of a power supply voltage due to the negative current, thereby implementing high performance and high reliability.
摘要翻译：在执行同步整流PWM操作的无刷电动机的驱动器中，在同步整流PWM操作和单向PWM操作之间的任意定时进行切换，以防止电源的负电流，从而防止电源的增加电压由于负电流，从而实现高性能和高可靠性。

2. 发明授权

US6020715A Control device for a brushless motor 失效
标题翻译：无刷电机控制装置
公开(公告)号：US6020715A
公开(公告)日：2000-02-01
申请号：US144017
申请日：1993-11-01
申请人： Masahiro Yasohara , Toshiki Tsubouchi , Hiromitsu Nakano , Toshiaki Seima
发明人： Masahiro Yasohara , Toshiki Tsubouchi , Hiromitsu Nakano , Toshiaki Seima
IPC分类号： H02P6/00 , H02P6/08 , H02P5/28
CPC分类号： H02P6/08 , H02P6/34
摘要： A motor driving power supplying section obtains an output voltage by switching-controlling a predetermined voltage outputted from a main power supply and smoothing a voltage thus switching-controlled. A driving transistor group includes a plurality of driving transistors, for supplying electric power based on the output voltage of the motor driving power supplying section to the motor driving coils of multiple phases. A commutation control section supplies conduction switching signals to the driving transistor group so as to switch successive conduction states of the motor driving coils. An output control section controls the output voltage of the motor driving power supplying section so that a collector-emitter voltage of at least one of the plurality of driving transistors included in the driving transistor group has a predetermined value. A torque control section controls conduction current intensity to the motor driving coils by controlling output currents of the plurality of driving transistors included in the driving transistor group.
摘要翻译：电动机驱动电力供给部通过切换控制从主电源输出的预定电压并对由此切换控制的电压进行平滑而获得输出电压。驱动晶体管组包括多个驱动晶体管，用于基于电动机驱动电力供给部的输出电压将电力提供给多相的电动机驱动线圈。换向控制部分向驱动晶体管组提供导通开关信号，以切换马达驱动线圈的连续导通状态。输出控制部分控制电动机驱动电力供给部的输出电压，使得驱动晶体管组中包含的多个驱动晶体管中的至少一个的集电极 - 发射极电压为规定值。转矩控制部通过控制包括在驱动晶体管组中的多个驱动晶体管的输出电流来控制对电动机驱动线圈的导通电流强度。

3. 发明授权

US06873125B2 Motor driving apparatus and motor using the same 有权
标题翻译：电机驱动装置和电动机采用相同的
公开(公告)号：US06873125B2
公开(公告)日：2005-03-29
申请号：US10446376
申请日：2003-05-28
申请人： Toshiaki Seima , Tomoharu Yokouchi
发明人： Toshiaki Seima , Tomoharu Yokouchi
IPC分类号： H02P6/08 , H02P1/40 , H02P6/00 , H02P6/18 , H02P6/20 , H02P6/24 , H02P7/00 , H02P27/06 , H02P27/08
CPC分类号： H02P27/08 , H02P1/40
摘要： A motor driving apparatus includes a pulse-width modulator and a PWM frequency switch for switching a carrier frequency of the modulator. The PWM frequency switch changes a carrier frequency in a start-up period of the motor to another frequency when the motor enters into a regular rotation. The carrier frequency in the start-up period is set at a lower level than that in the regular rotation period, so that the driving apparatus can reduce power-loss generated in the start-up period by switching actions of respective driving elements forming a first and a second drivers. In the regular rotation period, the driving apparatus performs PWM-driving with a high enough carrier frequency, so that the motor driven by this driving apparatus can realize accurate rotation.
摘要翻译：电动机驱动装置包括用于切换调制器的载波频率的脉冲宽度调制器和PWM频率开关。当电机进入正常旋转时，PWM频率开关将马达启动时段的载波频率改变为另一个频率。启动周期中的载波频率被设定在比正常旋转周期的载波频率更低的水平，从而驱动装置可以通过切换各个驱动元件的动作来减少启动周期中产生的功率损耗和第二个驱动程序。在常规旋转周期中，驱动装置以足够高的载波频率执行PWM驱动，使得由该驱动装置驱动的马达能够实现精确的旋转。

4. 发明授权

US4958948A System for driving a brushless motor 失效
标题翻译：无刷电机驱动系统
公开(公告)号：US4958948A
公开(公告)日：1990-09-25
申请号：US416538
申请日：1989-10-03
申请人： Toshiaki Seima , Susumu Yamamoto , Hiromitsu Nakano
发明人： Toshiaki Seima , Susumu Yamamoto , Hiromitsu Nakano
IPC分类号： H02P6/06 , H02P6/18
CPC分类号： H02P6/06 , H02P6/182 , H02P2209/07 , Y10S388/911
摘要： A system for driving a brushless motor comprises motor drive coils belonging to a plurality of phases respectively, a plurality of pairs of drive transistors connected to the drive coils respectively, a distribution circuit for sequentially distributing drive-coil energization switching signals to the plural drive transistors respectively, a slope synthesizer for smoothing leading and trailing slope portions of the drive-coil energization switching signals so as to apply the smoothed energization switching signals to the drive transistors respectively through the distribution circuit, a voltage-controlled oscillator for supplying a signal having a suitable frequency as an input to the slope synthesizer, a phase error detector for detecting the phase difference between counter-electromotive voltages induced in the drive coils and the drive-coil energization switching signals in a driver-coil energization pause period, and an error amplifier for amplifying the output signal of the phase error detector and applying the amplified phase error signal as an input to the voltage-controlled oscillator.

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