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1. 发明授权

US06396225B1 DC current brushless motor driving apparatus and air conditioner with using thereof 失效
标题翻译：直流电流无刷电动机驱动装置及其使用的空调装置
公开(公告)号：US06396225B1
公开(公告)日：2002-05-28
申请号：US09557219
申请日：2000-04-25
申请人： Toyomitsu Wakui , Kouji Katou , Atsushi Okuyama , Hideki Terauchi , Minoru Makita , Kisasu Kaneko , Masayuki Iwasaki , Kenji Tamura
发明人： Toyomitsu Wakui , Kouji Katou , Atsushi Okuyama , Hideki Terauchi , Minoru Makita , Kisasu Kaneko , Masayuki Iwasaki , Kenji Tamura
IPC分类号： H02K2300
CPC分类号： H02P6/185 , H02P6/085 , H02P6/20
摘要： For detecting commutation timing of an inverter when operating a DC brushless motor under a starting thereof or a light load condition, with certainty, a micro-computer generates driving signals so as to drive switching elements of the inverter by PWM signals of those driving signals, in a predetermined order by every turn-on interval, thereby supplying driving current to the DC brushless motor, wherein a timing for exchange between the turn-on intervals (i.e., the commutation timing) is detected by detection of level of magnetic pole position detecting signals upon a basis of the PWM signals. Here, the minimum ON time of the PWM signals is set at a time being detectable in the level of the magnetic pole position detecting signals, however the frequency of the PWM signals is lowered when the DC brushless motor is operated in starting or under a light load condition, so as to make duty ratio of the PWM signals fit to the operation in the starting or under the light load condition, thereby enabling to ensure the minimum ON time of the PWM signals.
摘要翻译：为了检测在起动或轻负载条件下操作DC无刷电动机时逆变器的换向定时，微计算机确定地产生驱动信号，以便通过那些驱动信号的PWM信号驱动逆变器的开关元件，按照每个接通间隔的预定顺序，由此向DC无刷电动机提供驱动电流，其中通过检测磁极位置检测电平来检测接通间隔（即，换向定时）之间的交换定时信号基于PWM信号。这里，PWM信号的最小导通时间在磁极位置检测信号的电平中被设定为可以检测的时间，但是当直流无刷电动机在启动时或在光照下操作时，PWM信号的频率降低负载状态，使PWM信号的占空比适应于起动时或轻负载条件下的工作，从而能够确保PWM信号的最小导通时间。

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