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公开(公告)号：US09709533B2
公开(公告)日：2017-07-18
申请号：US13721721
申请日：2012-12-20
Applicant: STMicroelectronics S.r.l.
Inventor： Nicolo Nizza , Paolo Pascale , Andrea Diruzza , Michele Berto Boscolo
Abstract: A method determines a resonance frequency of a resonant device. The method includes stimulating the resonant device with a periodic input signal having a frequency in a frequency interval; determining a frequency value for said periodic input signal in said frequency interval for which a phase-difference between said periodic input signal and a corresponding periodic output signal of the resonant device is minimum; generating a flag indicating that a resonance frequency has been determined; and generating signals representing said resonance frequency as a value of the frequency of said periodic input signal.
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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
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。
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3.发明授权公开(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
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。
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4.发明申请公开(公告)号：US20130167643A1
公开(公告)日：2013-07-04
申请号：US13721721
申请日：2012-12-20
Applicant: STMicroelectronics S.r.l.
Inventor： Nicolo Nizza , Paolo Pascale , Andrea Diruzza , Michele Berto Boscolo
IPC: G01N29/36
Abstract: A method determines a resonance frequency of a resonant device. The method includes stimulating the resonant device with a periodic input signal having a frequency in a frequency interval; determining a frequency value for said periodic input signal in said frequency interval for which a phase-difference between said periodic input signal and a corresponding periodic output signal of the resonant device is minimum; generating a flag indicating that a resonance frequency has been determined; and generating signals representing said resonance frequency as a value of the frequency of said periodic input signal.
Abstract translation: 一种方法确定谐振装置的谐振频率。 该方法包括用具有频率间隔的频率的周期性输入信号来刺激谐振装置; 确定所述周期性输入信号和所述谐振装置的相应周期性输出信号之间的相位差最小的所述频率间隔中的所述周期性输入信号的频率值; 产生指示已经确定了共振频率的标志; 以及产生表示所述谐振频率的信号作为所述周期性输入信号的频率的值。
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