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1. 发明授权

US10193476B1 Systems and methods for operating a brushless DC motor 有权
公开(公告)号：US10193476B1
公开(公告)日：2019-01-29
申请号：US15386491
申请日：2016-12-21
申请人： Marvell International Ltd.
发明人： Yichao Wang , Foo Leng Leong , Edy Susanto
IPC分类号： H02P6/28
摘要： A system for controlling operation of a brushless DC motor is provided. The system includes a memory, driving profile and motor controllers, and an inverter. The memory stores: a scaling factor indicative of how much to increase an operating parameter of a base driving profile; and the base driving profile indicative of speed over time of a drive cycle of the brushless DC motor. The driving profile controller generates a motor driving profile, indicating an operating parameter for driving the brushless DC motor, where the operating parameter is based on (i) the scaling factor, and (ii) the base driving profile. The controller generates a control signal based on the operating parameter of the motor driving profile. The inverter: receives a direct current from a DC source; responsively to the control signal, converts the direct current to an alternating current; and drives the brushless DC motor via the alternating current.

2. 发明授权

US09912267B1 Rotor lock detection 有权
公开(公告)号：US09912267B1
公开(公告)日：2018-03-06
申请号：US14997283
申请日：2016-01-15
申请人： Marvell International Ltd.
发明人： Edy Susanto , Foo Leng Leong
IPC分类号： H02P6/12 , H02P29/02 , H02P6/16 , H02P6/182
CPC分类号： H02P6/12 , H02P6/16 , H02P6/182 , H02P29/021
摘要： A circuit comprises a position sensing circuit to sense first and second position states of a rotating object, a first counter storing a first counter value, and a second counter storing a second counter value. The first counter value is incremented when the position states are the same, the second counter value is incremented when the position states indicate that the rotating object has rotated in a direction, and a fault is indicated when either counter value is equal to or greater than their respective limits. A method comprises sensing two position states of a rotating object, incrementing a first counter value when the position states are the same, incrementing a second counter value when the rotating object is determined, using the position states, to have rotated in a direction, and indicating a fault when either counter value is equal to or greater than their respective limits.

3. 发明授权

US09543863B1 Method to eliminate current surge during spindle spin up 有权
标题翻译：在主轴旋转时消除电流浪涌的方法
公开(公告)号：US09543863B1
公开(公告)日：2017-01-10
申请号：US13744043
申请日：2013-01-17
申请人： Marvell International Ltd.
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： G05B11/28 , H02P6/00
CPC分类号： H02P6/002 , H02P6/08 , H02P6/28 , H02P23/20
摘要： Systems and methods to eliminate current surge during spindle spin up, include, in at least one aspect, a method including: using a duty cycle with a spindle motor to spin-up the spindle motor to achieve a steady-state operating speed for the spindle motor, wherein the spindle motor comprises phase windings; and using an adjusted version of the duty cycle for a period during the spin-up to reduce current surge onto a supply capacitor associated with the spindle motor during phase switching for the phase windings.
摘要翻译：在主轴旋转期间消除电流浪涌的系统和方法在至少一个方面包括一种方法，包括：使用主轴电机的占空比来旋转主轴电机以实现主轴的稳态运行速度马达，其中所述主轴马达包括相绕组; 并且在相位绕组的相位切换期间，在升压期间使用调整版本的占空比在减少与主轴电动机相关联的电源电容器上的电流浪涌。

4. 发明授权

US08766583B1 Voltage mode using pseudo current limit 有权
标题翻译：电压模式使用伪电流限制
公开(公告)号：US08766583B1
公开(公告)日：2014-07-01
申请号：US13783569
申请日：2013-03-04
申请人： Marvell International Ltd.
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： G05B11/28
CPC分类号： H02P6/08 , H02P6/28 , H02P23/20
摘要： According to an aspect of the invention, an apparatus includes: a spindle motor; and circuitry configured to spin up the spindle motor by increasing a command voltage in small steps while monitoring a current flowing through the spindle motor. According to another aspect of the invention, a method includes: spinning up a spindle motor from a stationary state to a target speed using a voltage mode of operation for the spindle motor, wherein the spinning up includes supplying to the spindle motor a series of multiple discrete voltage levels ranging from a first voltage level to a second voltage level; and maintaining the spindle motor at the target speed.
摘要翻译：根据本发明的一个方面，一种装置包括：主轴电动机; 以及电路，被配置为通过在监视流过主轴电机的电流的同时以小步骤增加指令电压来旋转主轴电机。根据本发明的另一方面，一种方法包括：使用主轴电机的电压工作模式将主轴电机从静止状态旋转到目标速度，其中，所述旋转包括向主轴电动机供应一系列多个从第一电压电平到第二电压电平的离散电压电平; 并将主轴电机保持在目标速度。

5. 发明授权

US08497647B1 Motor spindle control system and method 有权
标题翻译：电机主轴控制系统及方法
公开(公告)号：US08497647B1
公开(公告)日：2013-07-30
申请号：US13663341
申请日：2012-10-29
申请人： Marvell International Ltd.
发明人： Ravishanker Krishnamoorthy , Foo Leng Leong
IPC分类号： H02P6/18
CPC分类号： H02P6/182 , G11B19/28 , H02P6/10
摘要： A control system and method for a multi-phase motor substantially reduces or eliminates jitter resulting from. drive mismatch by replacing a conventional trapezoidal drive profile with a drive profile that causes the voltage applied across active phases of the motor to match the back-EMF across those phases. In an ideal motor, the back-EMF is substantially sinusoidal, and although the drive profile applied to each phase is not truly substantially sinusoidal, the drive voltage across the active phases is substantially sinusoidal. In a non-ideal motor, the back-EMF is not truly sinusoidal and the drive profiles applied to each phase are calculated to cause the drive voltage across the active phases to match the back-EMF across those phases.
摘要翻译：用于多相电动机的控制系统和方法基本上减少或消除由此产生的抖动。通过用驱动轮廓代替常规的梯形驱动轮廓，使得在电动机的有效相上施加的电压与跨过这些相的反电动势匹配来实现驱动不匹配。在理想的电动机中，反电动势基本上是正弦的，并且虽然施加到每个相的驱动轮廓不是真正基本上是正弦的，但是有效相两端的驱动电压基本上是正弦的。在非理想电动机中，反电动势不是真正的正弦曲线，并且计算应用于每个相位的驱动器曲线，以使有源相之间的驱动电压与这些相位之间的反电动势匹配。

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