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公开(公告)号：US20170257041A1
公开(公告)日：2017-09-07
申请号：US15506785
申请日：2015-08-25
申请人： Kevin LEE , Kai WANG , Wenxi YAO , Eaton Corporation
CPC分类号： H02K17/02 , H02P1/28 , H02P1/30 , H02P23/0031 , H02P27/047 , H02P2103/10
摘要： The present invention provides an acceleration method for V/f controlled induction motor in flux-weakening region, which comprises: acquiring no-load magnetizing current Im of the induction motor at current stator frequency; selecting a smaller one of 0.5·Im(1/σ+1) and (Im2+σ)/(Im+σIm) as magnetizing current set point, in which σ is an estimated total leakage inductance coefficient; getting an error signal by subtracting the magnetizing current of the induction motor from the magnetizing current set point; determining the stator frequency for the next control period according to the error signal which is provided as a controlling variable of negative feedback. The acceleration method of the present invention can provide the maximum output torque in flux-weakening region and has a larger tolerance for the error of the estimated leakage inductance.
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公开(公告)号：US08861238B2
公开(公告)日：2014-10-14
申请号：US13595883
申请日：2012-08-27
IPC分类号： H02M7/217
CPC分类号： H02M7/217
摘要： An alternating current-to-direct current (AC-DC) converter is provided. The converter may include a transformer having a primary side and a secondary side. A first bi-directional switch and a first inductor may be connected in series between a positive terminal of an AC source and a first terminal of the primary side of the transformer. A second bi-directional switch and a second inductor may be connected between the positive terminal of the AC source and a second terminal of the primary side of the transformer and connected in parallel with the first bi-directional switch.
摘要翻译： 提供交流电直流电（AC-DC）转换器。 转换器可以包括具有初级侧和次级侧的变压器。 第一双向开关和第一电感器可以串联连接在AC电源的正极端子和变压器初级侧的第一端子之间。 第二双向开关和第二电感器可以连接在AC源的正极端子和变压器初级侧的第二端子之间并与第一双向开关并联连接。
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公开(公告)号：US20130051102A1
公开(公告)日：2013-02-28
申请号：US13595883
申请日：2012-08-27
CPC分类号： H02M7/217
摘要： An alternating current-to-direct current (AC-DC) converter is provided. The converter may include a transformer having a primary side and a secondary side. A first bi-directional switch and a first inductor may be connected in series between a positive terminal of an AC source and a first terminal of the primary side of the transformer. A second bi-directional switch and a second inductor may be connected between the positive terminal of the AC source and a second terminal of the primary side of the transformer and connected in parallel with the first bi-directional switch.
摘要翻译： 提供交流电直流电（AC-DC）转换器。 转换器可以包括具有初级侧和次级侧的变压器。 第一双向开关和第一电感器可以串联连接在AC电源的正极端子和变压器初级侧的第一端子之间。 第二双向开关和第二电感器可以连接在AC源的正极端子和变压器初级侧的第二端子之间并与第一双向开关并联连接。
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