公开(公告)号：US09391551B2

公开(公告)日：2016-07-12

申请号：US14307643

申请日：2014-06-18

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Michele Boscolo Berto ,  Federico Magni

IPC: H02P6/18

CPC classification number: H02P6/182

Abstract: A device may detect the zero-cross event of a BEMF of an electric motor with first, second, and third phase windings driven by respective first, second, and third power driving stages. The device may include a control circuit configured to place at an impedance state the third power driving stage relative to the third phase winding, the third phase winding being coupled to a zero-cross detecting circuit, introduce a masking signal to mask an output signal of the zero-cross detecting circuit in correspondence with each rising edge of a first driving signal of the first power driving stage relative to the first phase winding, and determine whether a first duty-cycle of the first driving signal is such that a duration of a masking window of the masking signal is greater than an on-time period of the first driving signal.

Abstract translation: 装置可以检测由相应的第一，第二和第三电力驱动级驱动的第一，第二和第三相绕组的电动机的BEMF的零交叉事件。 该装置可以包括控制电路，其被配置为将第三功率驱动级相对于第三相绕组处于阻抗状态，第三相绕组耦合到零交叉检测电路，引入屏蔽信号以屏蔽 所述过零检测电路对应于所述第一驱动级相对于所述第一相绕组的第一驱动信号的每个上升沿，并且确定所述第一驱动信号的第一占空比是否为 屏蔽信号的屏蔽窗口大于第一驱动信号的接通时间段。

公开(公告)号：US09294030B2

公开(公告)日：2016-03-22

申请号：US14168171

申请日：2014-01-30

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Pascale ,  Federico Magni ,  Ezio Galbiati ,  Giuseppe Maiocchi ,  Michele Berto Boscolo

IPC: G05B19/40 ,  H02P23/00 ,  H02P6/14

CPC classification number: H02P23/0031 ,  H02P6/14 ,  H02P23/0004

Abstract: A method of PWM regulating a motor through a half-bridge drive stage includes sampling the motor current to obtain sampled values during driving intervals or during current decay intervals, and comparing a last sampled value with a current threshold. The motor is coupled in a slow decay electrical path for the duration of a current decay interval if the last sampled value does not exceed the current threshold. Otherwise the motor is coupled in a fast decay electrical path for a portion of the duration of the current decay interval, and is coupled in the slow decay electrical path for a remaining part of the duration of the same current decay interval.

Abstract translation: 通过半桥驱动级PWM调节电动机的方法包括：在驱动间隔期间或电流衰减间隔期间对电动机电流进行采样以获得采样值，并将最后采样值与电流阈值进行比较。 如果最后一个采样值不超过当前阈值，则电机在电流衰减间隔的持续时间内以慢衰减电路连接。 否则，电动机在电流衰减区间的持续时间的一部分中以快速衰减电路连接，并且在慢衰减电路中被耦合在相同电流衰减间隔的持续时间的剩余部分中。

公开(公告)号：US09257920B2

公开(公告)日：2016-02-09

申请号：US14327048

申请日：2014-07-09

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Michele Berto Boscolo ,  Federico Magni ,  Paolo Pascale ,  Ezio Galbiati

IPC: H02P6/08 ,  H02P6/00 ,  H02P6/18

CPC classification number: H02P6/002 ,  H02P6/085 ,  H02P6/182 ,  H02P6/28 ,  H02P6/34

Abstract: A method of driving a permanent magnet synchronous electric motor includes sensing or estimating a back electromotive force induced in at least a winding of the motor by the rotation of a rotor of the motor; and reading, from a memory, values of a first voltage waveform having a phase angle with respect to the back electromotive force. The method also includes generating a driving voltage corresponding to the sum of values of a control voltage, obtained as product of the values of the first voltage waveform by a first coefficient determined as a function of a desired value of motor torque, and values of a cancelation voltage of the back electromotive force. The method also includes applying the driving voltage at the motor winding.

Abstract translation: 驱动永久磁铁同步电动机的方法包括通过电动机的转子的旋转感测或估计在电动机的至少一个绕组中感应的反电动势; 以及从存储器读取具有相对于所述反电动势的相位角的第一电压波形的值。 该方法还包括产生与作为第一电压波形的值的乘积的控制电压的值的和相对应的驱动电压，该第一系数作为电动机转矩的期望值确定的第一系数，以及 背电动势的取消电压。 该方法还包括在电动机绕组处施加驱动电压。