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公开(公告)号:US5285145A
公开(公告)日:1994-02-08
申请号:US474051
申请日:1990-04-24
IPC分类号: H02M7/5387 , H02P21/00 , H02P27/08 , H02P5/40
CPC分类号: H02P27/08 , H02M7/53873 , H02P21/00 , H02M2007/53876 , H02P27/047
摘要: A current transformer (4) detects the output currents of a voltage-type inverter (INV), and comparators (6) check whether the outputs from the current transformer exceed a predetermined limit value. The detected output currents are fed to a vector analyzer (8) to determine the location of the output current vector. A zone determining circuit (9) determines the location of the current vector in the zones. An output pattern generating circuit (10) responds to the output from the zone determining circuit (9) and provides a switching pattern corresponding to the voltage vector nearest to a vector having the direction opposite to that of the output current vector. A selector (2), being controlled by the comparator (6), selects a switching pattern from the output pattern generating circuit and provides it to the inverter (INV), when the comparator (6) detects that the magnitude of the current vector exceeds the predetermined limit value. The rate of change of the output current vector works so as to reduce the current regardless of whether the motor (IM) (a load of the inverter) is to be driven or braked, regardless of the location of the counter-electromotive force vector or the location of the voltage vector selected at that timing when the current limit enters into action. This ensures that the output current of the inverter (INV) will be reduced.
摘要翻译: PCT No.PCT / JP89 / 00889 Sec。 371日期:1990年04月24日 102(e)日期1990年04月24日PCT提交1989年8月30日PCT公布。 出版物WO90 / 02442 日期:1990年3月8日。电流互感器(4)检测电压型逆变器(INV)的输出电流,比较器(6)检查电流互感器的输出是否超过预定极限值。 检测到的输出电流被馈送到矢量分析器(8)以确定输出电流矢量的位置。 区域确定电路(9)确定区域中当前矢量的位置。 输出模式产生电路(10)响应于区域确定电路(9)的输出,并且提供与最接近于具有与输出电流矢量方向相反的方向的矢量的电压矢量对应的开关模式。 由比较器(6)控制的选择器(2)从输出模式发生电路中选择开关模式,并将其提供给逆变器(INV),当比较器(6)检测到电流矢量的大小超过 预定极限值。 无论电动势矢量的位置如何,输出电流矢量的变化率都可以工作,无论电动机(IM)(逆变器的负载)是被驱动还是制动,都可以减小电流,或者 当电流限制进入动作时,在该定时选择的电压矢量的位置。 这确保了逆变器(INV)的输出电流将被减小。
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公开(公告)号:US09484792B2
公开(公告)日:2016-11-01
申请号:US13533587
申请日:2012-06-26
申请人: Akihiro Utsumi , Yoshinobu Nagao , Hiroshi Katou
发明人: Akihiro Utsumi , Yoshinobu Nagao , Hiroshi Katou
CPC分类号: H02K15/03 , H02K1/276 , Y10T29/49012
摘要: A rotor has a rotor core arranged to radially face a stator. The rotor core has an accommodation hole extending axially from an axial end face of the rotor core. A magnet is received in the accommodation hole. A recess, which is dented in a direction separating from the magnet, is formed in an end surface of the accommodation hole. The recess has an opening facing the magnet. A pair of open distal portions are arranged at opposite sides of the opening and pressed against the magnet.
摘要翻译: 转子具有径向面对定子的转子芯。 转子芯具有从转子芯的轴向端面轴向延伸的容纳孔。 磁体被容纳在容纳孔中。 在与容纳孔分离的方向上凹陷的凹部形成在容纳孔的端面上。 凹部具有面向磁体的开口。 一对开口的远端部分布置在开口的相对两侧并压在磁体上。
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公开(公告)号:US20130002082A1
公开(公告)日:2013-01-03
申请号:US13533587
申请日:2012-06-26
申请人: Akihiro UTSUMI , Yoshinobu NAGAO , Hiroshi KATOU
发明人: Akihiro UTSUMI , Yoshinobu NAGAO , Hiroshi KATOU
CPC分类号: H02K15/03 , H02K1/276 , Y10T29/49012
摘要: A rotor has a rotor core arranged to radially face a stator. The rotor core has an accommodation hole extending axially from an axial end face of the rotor core. A magnet is received in the accommodation hole. A recess, which is dented in a direction separating from the magnet, is formed in an end surface of the accommodation hole. The recess has an opening facing the magnet. A pair of open distal portions are arranged at opposite sides of the opening and pressed against the magnet.
摘要翻译: 转子具有径向面对定子的转子芯。 转子芯具有从转子芯的轴向端面轴向延伸的容纳孔。 磁体被容纳在容纳孔中。 在与容纳孔分离的方向上凹陷的凹部形成在容纳孔的端面上。 凹部具有面向磁体的开口。 一对开口的远端部分布置在开口的相对两侧并压在磁体上。
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