st7mc或st8现在是无传感器BLDC项目

你好
 
 
我正在启动一个控制无传感器BLDC电机的项目。
 
我不确定什么是最好的芯片/套件，基于st7mc或st8的套件
 
我需要两个选项之间最可配置的平台，因为我正在尝试自行启动基于永磁体的交流发电机（最初设计为电机）
 
意见表示赞赏
 
谢谢
 
帕特里克
 
 
[此消息由以下人士编辑：circaeng于26-11-2009 04:25发表]
 
 
[此消息由以下人员编辑：circaeng于26-11-2009 04:34]



以下为原文




Hi


I am starting a project to control a sensorless BLDC motor.  

I am not sure what is the best chip/kit to start with, the st7mc or st8 based kit  

I need the most configurable platform between the two choices since I am trying to self start a permanent magnet based alternator ( not originally designed to be a motor)  

Opinions appreciated  

Thank You  

Patrick  


[ This message was edited by: circaeng on 26-11-2009 04:25 ]  


[ This message was edited by: circaeng on 26-11-2009 04:34 ]

这在很大程度上取决于您喜欢使用的方法：6步（称为梯形或块式换向）或正弦曲线，最大速度，传感器（霍尔，编码器）的可用性，极对数，您在电机调整方面的经验等。
 
 
ST7FMC几乎没有什么优势：传感器电路（z-crossing，退磁）由HW管理，存在可以帮助几乎实时调整应用程序的控制面板，并且可以在真正高速（最高200）下实现更好的控制kRPM *极对）。
 
STM8更便宜，因为它不会使用MC外设（;-)分配> 50％的硅，但所有传感器都通过ADC读数进行管理，从而在非常高的速度下降低了切换分辨率。
 
提供更多详细信息供讨论！



以下为原文




It highly depends on the method you like to use: 6-step (called trapeziodal, or block commutation) or sinusoidal, on the maximum speed, availability of sensors (hall, encoder), number of pole pairs, your experience in motor tuning etc.


The ST7FMC has few advantages: the sensor circuitry (z-crossing, demagnetization) is managed by HW, there exists control panel that can help to tune the application in almost real-time, and has better control in really high speeds (up to 200 kRPM * pole-pair).  

The STM8 is cheaper, because it doesn't allocate >50% of silicon with the MC peripheral (;-)), but all sensors are managed via ADC readings, thus decreasing switching resolution at very high speeds.  

Give more details for discussion!