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    • 86. 发明申请
    • MOTOR DRIVE CIRCUIT AND ILLUMINATION APPARATUS AND METHOD
    • 电机驱动电路和照明装置和方法
    • US20140246995A1
    • 2014-09-04
    • US14279641
    • 2014-05-16
    • Semiconductor Components Industries, LLC
    • Tetsuya YoshitomiMasashi TanabeShunji Suzuki
    • H02P6/22
    • H02P6/22H02P6/30
    • A motor-drive circuit includes: an output transistor configured to supply a drive current to a motor for a cooling fan; a switching-control circuit configured to control switching of the output transistor so that the motor rotates in a first direction, or rotates in a second direction opposite to the first direction; and a switching circuit configured to, when a first time has elapsed since start of rotation of the motor in the first direction, cause the switching-control circuit to start switching control so that the motor stops rotating in the first direction and thereafter rotates in the second direction, and configured to, when a second time has elapsed since start of rotation of the motor in the second direction, cause the switching-control circuit to start switching control so that the motor stops rotating in the second direction and thereafter rotates in the first direction.
    • 电动机驱动电路包括:输出晶体管,被配置为向用于冷却风扇的电动机提供驱动电流; 开关控制电路,被配置为控制所述输出晶体管的开关,使得所述电动机沿第一方向旋转,或者沿与所述第一方向相反的第二方向旋转; 以及开关电路,其被配置为当从所述电动机沿所述第一方向旋转开始经过第一次时,使所述开关控制电路开始切换控制,使得所述电动机在所述第一方向上停止旋转,然后在所述第一方向上旋转 第二方向,并且被配置为当从第二方向的电动机的旋转开始经过第二次时,使开关控制电路开始切换控制,使得电动机在第二方向上停止旋转,然后在 第一个方向
    • 89. 发明授权
    • One-phase brushless motor
    • 单相无刷电机
    • US08294398B2
    • 2012-10-23
    • US12830492
    • 2010-07-06
    • Henry WeissbachJens Löffler
    • Henry WeissbachJens Löffler
    • H02P6/04
    • G01P13/04H02P6/182H02P6/22H02P6/26
    • An electronically commutated one-phase motor (20; 20′) has a stator having at least one winding strand (30, 32; 30′), and it has a permanent-magnet rotor (22) that induces, as it rotates, a voltage (uind) in the winding strand. The motor further has an electronic calculation device or microcontroller (26) which is configured to execute, during operation, the following steps repetitively: sampling the induced voltage (uind) in a currentless winding strand, for example, during a half-wave of the induced voltage, in order to obtain a plurality of analog voltage values; digitizing the analog voltage values in order to obtain a plurality of digitized voltage values; and processing the plurality of digitized voltage values to ascertain the instantaneous rotation direction of the motor rotor.The control circuit then can use these data to assure reliable motor start-up, regardless of any external driving forces which occur.
    • 电子换向单相电动机(20; 20')具有定子,该定子具有至少一个绕组(30,32; 30'),并且其具有永磁转子(22),该永磁转子 绕组中的电压(uind)。 电动机还具有电子计算装置或微控制器(26),其被配置为在操作期间重复地执行以下步骤:对无电流绕组中的感应电压(uind)进行采样,例如在半波 感应电压,以获得多个模拟电压值; 数字化模拟电压值以获得多个数字化电压值; 以及处理多个数字化电压值以确定电机转子的瞬时旋转方向。 然后,控制电路可以使用这些数据来确保可靠的电机启动,而不管发生什么外部驱动力。
    • 90. 发明申请
    • BRUSHLESS DC MOTOR STARTS FOR A BARRIER FREE MEDICAL TABLE
    • 无刷直流电机启动无障碍医疗表
    • US20120062011A1
    • 2012-03-15
    • US12878321
    • 2010-09-09
    • Chris JonesRodney Hyre
    • Chris JonesRodney Hyre
    • A61G15/10A61G15/02H02P6/22
    • A61G15/02A61G2203/12A61G2203/726H02P6/22
    • A boot-strap capacitor pre-charge algorithm prevents unwanted motions in an examination table using a brushless direct current motor. The motor is supplied with power by a motor drive circuit which includes a high-side transistor coupled to a high-side gate driver, a low-side transistor coupled to a low-side gate driver, and a boot-strap capacitor coupled with the high-side gate driver. A control panel is provided that communicates with a motor controller. When the motor controller receives an indication that the motor is to be started, the motor controller activates a low-side gate driver to switch on the low-side transistor, thereby causing the boot-strap capacitor to charge. The motor controller then deactivates the low-side gate driver to switch off the low-side transistor and activates the high-side gate driver to switch on the high-side transistor, causing a voltage to be supplied to a stator of the first motor and/or second motor.
    • 引导电容器预充电算法使用无刷直流电机防止检查台中的不必要的运动。 电动机由电动机驱动电路供电,电动机驱动电路包括耦合到高侧栅极驱动器的高侧晶体管,耦合到低侧栅极驱动器的低侧晶体管和耦合到低侧栅极驱动器的引导电容器 高边门驱动器。 提供与电机控制器通信的控制面板。 当电机控制器接收到电机启动指示时,电机控制器激活低侧栅极驱动器以接通低端晶体管,从而使引导电容器充电。 电动机控制器然后使低侧栅极驱动器去激活以关闭低侧晶体管,并激活高侧栅极驱动器以接通高边晶体管,从而将电压提供给第一电动机的定子,并且 /或第二电机。