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1. 发明申请

WO2015010234A1 HYBRID CONTROLLER FOR BRUSHLESS DC MOTOR 审中-公开
标题翻译：无刷直流电机混合控制器
公开(公告)号：WO2015010234A1
公开(公告)日：2015-01-29
申请号：PCT/CN2013/079780
申请日：2013-07-22
申请人： TEXAS INSTRUMENTS INCORPORATED , LU, Yisong , ZHANG, Ruochen , ZUO, Wei
发明人： LU, Yisong , ZHANG, Ruochen , ZUO, Wei
IPC分类号： H02P1/18 , H02P6/18
CPC分类号： H02P6/20 , H02P6/181 , H02P6/182 , H02P6/185 , H02P31/00 , H02P2207/05
摘要： A circuit includes a processor (230) that analyzes a pulse width modulated (PWM) signal feedback from a brushless DC motor (220) to determine a transition between a mutual inductance zero crossing condition and a Back Electro Motive Force (BEMF) zero crossing condition of the brushless DC motor (220). A mutual inductance controller (240) is executed by the processor (230) to commutate the brushless DC motor (220) at startup of the motor when the mutual inductance zero crossing condition is detected by the processor (230). A BEMF controller (250) is executed by the processor (230) to commutate the brushless DC motor (220) after startup of the motor when the BEMF zero crossing condition is detected by the processor (230). A method is also provided.
摘要翻译：电路包括处理器（230），其分析来自无刷直流电动机（220）的脉冲宽度调制（PWM）信号反馈，以确定互感零交叉条件和后电动力（BEMF）零交叉条件之间的转变的无刷直流电动机（220）。当处理器（230）检测到互感零交叉条件时，由电动机启动时，处理器（230）执行互感控制器（240）以换向无刷直流电动机（220）。当处理器（230）检测到BEMF过零状态时，BEMF控制器（250）由处理器（230）执行以在马达启动之后换向无刷直流电动机（220）。还提供了一种方法。

2. 发明申请

WO2013138990A1 PWM DUTY CYCLE SYNTHESIZER AND METHOD WITH ADJUSTABLE CORNER FREQUENCY 审中-公开
标题翻译： PWM占空比合成器和可调角度频率的方法
公开(公告)号：WO2013138990A1
公开(公告)日：2013-09-26
申请号：PCT/CN2012/072582
申请日：2012-03-20
申请人： TEXAS INSTRUMENTS INCORPORATED , TEXAS INSTRUMENTS JAPAN LIMITED , ZHANG, Ruochen , LU, Yisong , TAN, Pauy Guan
发明人： ZHANG, Ruochen , LU, Yisong , TAN, Pauy Guan
IPC分类号： H03K7/00
CPC分类号： H03K7/08
摘要： A PWM circuit for generating a PWM output signal (PWM OUT ) having an output frequency (f PWM ) in response to a PWM input signal (PWM IN ) having an input frequency (f PWMIN ) includes an algebraic summing circuit (3) for comparing the PWM output signal to the PWM input signal and producing an increment signal (INC) if a value of the PWM input signal exceeds a corresponding value of the PWM output signal and producing a decrement signal (DEC) if a value of the PWM input signal is less than a corresponding value of the PWM output signal. An integrator (5) produces a duty cycle signal (Duty[7:0]) representative of a duty cycle of the PWM input signal by producing an increase in value of the duty cycle signal in response to each increment signal produced by the algebraic summing circuit and by producing a decrease in value of the duty cycle signal in response to each decrement signal. A PWM generator circuit (9) produces the PWM output signal in response to the duty cycle signal to cause the duty cycle of the PWM output signal to precisely equal the duty cycle of the PWM input signal with no loss of duty cycle resolution.
摘要翻译：用于响应具有输入频率（fPWMIN）的PWM输入信号（PWMIN）产生具有输出频率（fPWM）的PWM输出信号（PWMOUT）的PWM电路包括用于将PWM输出信号（fPWM）进行比较的代数求和电路（3）如果PWM输入信号的值小于PWM输入信号的值，则PWM输入信号的值超过PWM输出信号的对应值并产生递减信号（DEC），并产生增量信号（INC），并产生递增信号（INC）相应的PWM输出信号值。积分器（5）通过响应由代数求和产生的每个增量信号产生占空比信号的值的增加来产生表示PWM输入信号的占空比的占空比信号（Duty [7：0]）并且通过响应于每个减量信号产生占空比信号的值的减小。 PWM发生器电路（9）响应于占空比信号产生PWM输出信号，以使PWM输出信号的占空比精确地等于PWM输入信号的占空比，同时不损耗占空比分辨率。

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