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1. 发明申请

US20140300427A1 LOOKUP TABLE ASSISTED PULSE WIDTH MODULATION 有权
标题翻译： LOOKUP TABLE辅助脉冲宽度调制
公开(公告)号：US20140300427A1
公开(公告)日：2014-10-09
申请号：US14200877
申请日：2014-03-07
申请人： Hamilton Sundstrand Corporation
发明人： Alex Seguritan , Ravishankar Piramanayagam
IPC分类号： H03K3/017
CPC分类号： H03K3/017 , H02M7/5395 , H03C2200/0045 , H03F3/217 , H03K7/08
摘要： Embodiments are directed to modulating a pulse width modulation (PWM) signal, by initializing at least one phase index to an initial value, establishing a set of values in a lookup table that correspond to data points for PWM comparator values that correspond to a given number of samples of a single periodic waveform during a predetermined sampling rate that establishes a table resolution, repeatedly executing the following operations at the predetermined sampling rate: determining a value of a command signal frequency, setting a value to a jump factor equal to the quotient of the value of the command signal frequency divided by the table resolution, progressing the value of the phase index by the value of the jump factor, selecting a value of a commutation vector from the lookup table that corresponds to the phase index, and loading the value of the commutation vector into a corresponding PWM comparator.
摘要翻译：实施例涉及通过将至少一个相位索引初始化为初始值来调制脉冲宽度调制（PWM）信号，在查找表中建立一组对应于对应于给定数字的PWM比较器值的数据点的值在确定表分辨率的预定采样率期间，以预定采样率重复执行以下操作的单周期波形的样本：确定命令信号频率的值，将值设置为等于命令信号频率的值除以表分辨率，将相位索引的值推进跳跃因子的值，从对应于相位索引的查找表中选择换向向量的值，并加载该值的换向向量转换成相应的PWM比较器。

2. 发明授权

US09768755B2 Lookup table assisted pulse width modulation 有权
公开(公告)号：US09768755B2
公开(公告)日：2017-09-19
申请号：US14200877
申请日：2014-03-07
申请人： Hamilton Sundstrand Corporation
发明人： Alex Seguritan , Ravishankar Piramanayagam
IPC分类号： H03F3/217 , H03K3/017 , H03K7/08 , H02M7/5395
CPC分类号： H03K3/017 , H02M7/5395 , H03C2200/0045 , H03F3/217 , H03K7/08
摘要： Embodiments are directed to modulating a pulse width modulation (PWM) signal, by initializing at least one phase index to an initial value, establishing a set of values in a lookup table that correspond to data points for PWM comparator values that correspond to a given number of samples of a single periodic waveform during a predetermined sampling rate that establishes a table resolution, repeatedly executing the following operations at the predetermined sampling rate: determining a value of a command signal frequency, setting a value to a jump factor equal to the quotient of the value of the command signal frequency divided by the table resolution, progressing the value of the phase index by the value of the jump factor, selecting a value of a commutation vector from the lookup table that corresponds to the phase index, and loading the value of the commutation vector into a corresponding PWM comparator.

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