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11. 发明专利

GB2402225A Method for measuring currents in a motor controller and motor controller using such method 未知
公开(公告)号：GB2402225A
公开(公告)日：2004-12-01
申请号：GB0419948
申请日：2003-04-11
申请人： DANFOSS DRIVES AS
发明人： ANDERSEN HENRIK ROSENDAL
IPC分类号： H02P7/29 , G01R19/00
摘要： The invention relates to a method for measuring currents in a motor controller. Some current sensing devices placed on the motor wires or inside the motor controller provide low amplitude output signals thus complicating sampling and data processing. In order to improve the signal/noise ratio, an oversampling technique is disclosed which makes used of a differential transmission of the output signal. Further, by applying intelligent sorting techniques on the sampled data, a substantial improvement in the signal/noise ratio can be obtained. The invention also concerns a motor controller using this method, and discloses the use of a power card and a control card, where the current sensing device is placed on the power card and a differential amplifier is placed on the control card. The gain of the differential amplifier is controlled by components placed on the power card as well as on the control card.

12. 发明专利

FI20041342A 未知
公开(公告)号：FI20041342A
公开(公告)日：2004-10-15
申请号：FI20041342
申请日：2004-10-15
申请人： DANFOSS DRIVES AS
发明人： ANDERSEN HENRIK ROSENDAL
IPC分类号： H02P7/29 , H02P
摘要： The invention relates to a method for measuring currents in a motor controller. Some current sensing devices placed on the motor wires or inside the motor controller provide low amplitude output signals thus complicating sampling and data processing. In order to improve the signal/noise ratio, an oversampling technique is disclosed which makes used of a differential transmission of the output signal. Further, by applying intelligent sorting techniques on the sampled data, a substantial improvement in the signal/noise ratio can be obtained. The invention also concerns a motor controller using this method, and discloses the use of a power card and a control card, where the current sensing device is placed on the power card and a differential amplifier is placed on the control card. The gain of the differential amplifier is controlled by components placed on the power card as well as on the control card.

13. 发明专利

DK200200572A 未知
公开(公告)号：DK200200572A
公开(公告)日：2003-10-18
申请号：DKPA200200572
申请日：2002-04-17
申请人： DANFOSS DRIVES AS
发明人： ANDERSEN HENRIK ROSENDAL
IPC分类号： H02P7/29 , H02P7/00 , G01R19/25 , H03H17/00
摘要： The invention relates to a method for measuring currents in a motor controller. Some current sensing devices placed on the motor wires or inside the motor controller provide low amplitude output signals thus complicating sampling and data processing. In order to improve the signal/noise ratio, an oversampling technique is disclosed which makes used of a differential transmission of the output signal. Further, by applying intelligent sorting techniques on the sampled data, a substantial improvement in the signal/noise ratio can be obtained. The invention also concerns a motor controller using this method, and discloses the use of a power card and a control card, where the current sensing device is placed on the power card and a differential amplifier is placed on the control card. The gain of the differential amplifier is controlled by components placed on the power card as well as on the control card.

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