公开(公告)号：EP0950281A1

公开(公告)日：1999-10-20

申请号：EP97911798.0

申请日：1997-10-20

申请人： Lear Automotive Dearborn, Inc.

发明人： DOYLE, Paul, C.

IPC分类号： H02P25 ,  G01R19

CPC分类号： H02P25/0925 ,  G01R19/0092

摘要： A current measuring apparatus measures current flowing through a phase winding (14a) of a switched reluctance motor while dissipating very little power. The apparatus includes a control (44a) for controlling the current flowing through the winding (14a). A gate (64) is operatively connected to the control (44a) for switching the current flowing through the winding (14a). The arrangement is such that in a first mode of the gate (64), the current flows through the phase winding (14a). In a second mode of the gate (64), flow of the current through the winding (14a) is inhibited. The gate (64) includes a sense means for sensing a fraction of the current when the gate (64) is in the first mode thereof. A resistor (52) of relatively high resistance is electrically connected in series with the sense means such that a voltage drop occurs across the resistor (52) when the gate (64) is in the first mode. The voltage drop signal is fed back to the control (44a) so that dependent on the signal, the current flowing through the phase winding (14a) of the motor is maintained in order to maximize motor efficiency.

公开(公告)号：EP0785615A4

公开(公告)日：1998-10-14

申请号：EP96925090

申请日：1996-07-25

申请人： SEKOH GIKEN KK

发明人： BAHN ITSUKI

IPC分类号： H02K19/10 ,  H02K29/00 ,  H02K29/12 ,  H02P25/08 ,  H02P7/00

CPC分类号： H02K29/12 ,  H02K19/103 ,  H02P25/08 ,  H02P25/0925

摘要： A reluctance motor comprising a fixed armature (1) and a rotor (5) of a magnetic substance disposed inside the armature (1) with a gap between them. Two salient poles (5a, 5b) having a width which is 2.5 times the angular pitch of slots (1a, 1b, ..., 1h) of the armature (1) are disposed round the outer peripheral portion of the rotor (5). A magnetic flux due to the excitation of armature coils (2h, 2d) of magnetic poles (4h, 4d) situated at positions at which no torque is generated is combined with the magnetic flux due to the excitation of armature coils (2a, 2e) of magnetic poles (4a, 4e) situated at positions in a direction of an arrow R at which a torque is generated. As a result, leakage fluxes Fa and Fb between the magnetic poles (4a, 4e) and the salient poles (5a, 5b) of the rotor (5) increase and the torque can be increased.

公开(公告)号：EP0632572B1

公开(公告)日：1998-01-21

申请号：EP93924186.5

申请日：1993-11-05

申请人： KABUSHIKIGAISHA SEKOGIKEN

发明人： BAHN, Itsuki

IPC分类号： H02P7/00

CPC分类号： H02P25/0925 ,  H02P25/092

摘要： The efficiency of a reluctance motor is enhanced, the noises and vibrations are reduced, and the cost, size and weight are reduced. For the reciprocating energization of the armature coil, one end of the coil of each phase, and the other are connected to the switching elements on the anode and cathode side through diodes connected in the forward direction. By this arrangement, the number of the switching elements required is reduced to half the number of switching elements of a conventional one.

公开(公告)号：EP0812057A1

公开(公告)日：1997-12-10

申请号：EP97113062.0

申请日：1996-02-01

申请人： A.O. Smith Corporation

发明人： Van Sistine, Thomas G. ,  Bartos, Ronald P. ,  Mehlhorn, William L. ,  Houle, Timothy H.

IPC分类号： H02P7/05

CPC分类号： H02P6/185 ,  H02P25/089 ,  H02P25/0925

摘要： A switched reluctance motor includes a rotor (14) mounted for rotation about an axis (18), and having a plurality of rotor poles (22, 26, 30, 34) and a stator (38) surrounding the rotor (14) and including first, second and third stator phases. The motor also includes energizing means for sequentially energizing the stator phases with an energy source to cause rotation of the rotor (14), based on rotor position information, the energizipg means causing one phase to be energized and then deenergized to a near zero current level prior to a point where the rotor pole breaks away from the stator pole. The energizing means further includes limited current turn on means connected to switch operating means for operating a switch on the one phase to permit flow of limited current through the one phase after it reaches a near zero current level but before the break away point. The first, second and third phases are arranged so that adjacent phases are conneted, alternately, between the positive supply voltage and the negative supply voltage.

公开(公告)号：EP0700594B1

公开(公告)日：1997-12-10

申请号：EP94917721.6

申请日：1994-05-27

申请人： THE UNIVERSITY OF WARWICK

发明人： WU, Chi Yao ,  POLLOCK, Charles

IPC分类号： H02P6/00

CPC分类号： H02P25/0925

摘要： A method of driving an electric motor having at least one coil winding comprising using a switching operation when the current (10) in the winding is to be switched from a first state to a second state. The switching operation has at least first and second switching steps, the interval between which is approximately equal to half the period of a dominant frequency of vibration of the motor (or to an integral multiple of the period plus a half). This reduces vibrations causing acoustic noise, enabling the motor to be operated more quietly. One or more intermediate steps may be included in the switching operation.

公开(公告)号：EP0778661A3

公开(公告)日：1997-08-20

申请号：EP96308168.2

申请日：1996-11-12

申请人： SWITCHED RELUCTANCE DRIVES LIMITED

发明人： Randall, Steven Paul

IPC分类号： H02P7/05

CPC分类号： H02P25/0925

摘要： A method of controlling a switched reluctance machine, having a rotor and a stator with at least one phase winding to reduce iron loss, whereby the phase winding is energized over a first angular period of the rotation of the rotor and then current in the phase winding is allowed through freewheel through the phase winding for a second angular period of rotor rotation where, in a first method, the second angular period is greater than the first angular period. Also a method of using freewheeling in high speed applications to reduce iron loss.

公开(公告)号：EP0765542A1

公开(公告)日：1997-04-02

申请号：EP94920927.0

申请日：1994-06-13

申请人： Daimler-Benz Aktiengesellschaft

发明人： ORTHMANN, Reinhard

IPC分类号： H02P25

CPC分类号： H02P25/0925

摘要： A process is disclosed for controlling the switching-off process of the branches of a reluctance engine whose stator is provided with windings to which are transmitted current pulses calculated as a function of angular position and speed of rotation of the rotor according to a predetermined algorithm. The excited branch is switched off when a switching-off angle (VP) is reached after a zero crossing (vo) reference angle. Two ranges of operation called 'chop' range and blocked voltage range must be differentiated. The switching-off angle (VP) for both ranges of operation of the reluctance engine is calculated according to the same algorithm and is set by a regulator. In the lower speed of rotation range, the 'chop' range, a pulse width modulated voltage is applied to the conductive branch and in the upper range, the blocked voltage range, a constant voltage is applied. In both ranges, the switching-off angle is calculated from engine parameters and actual operation values to maximise torque yield and to trigger the switching-off process by converting said values into a switching-off pulse that switches off the conductive branch.

公开(公告)号：EP0735653A1

公开(公告)日：1996-10-02

申请号：EP96301988.0

申请日：1996-03-22

申请人： SWITCHED RELUCTANCE DRIVES LTD

发明人： Sugden, David Mark

IPC分类号： H02K29/06 ,  H02P6/16

CPC分类号： G01D5/24461 ,  G01D3/08 ,  H02K29/06 ,  H02P6/12 ,  H02P6/16 ,  H02P25/0925

摘要： A failure detector for a position encoder which uses a plurality of position sensors (46a,46b,46c). The failure detector receives position signals from the plurality of position sensors. The position signals represent the rotor position for a switched reluctance machine, and the position signals have allowable states and allowable output state sequences that occur if the position encoder is operating properly. If one or more of the plurality of sensors fail or the rotating element of the position encoder is damaged, an illegal state occurs in the position signals from the position sensors. The failure detector produces a failure signal upon the occurrence of an illegal state. In addition, the failure detector monitors the sequence of the output states and generates a failure when the output states change in a sequence that is not one of the allowed sequences. The machine controller can respond to the failure signal to stop machine operation or trigger an alternate positioning scheme.

摘要翻译： 一种使用多个位置传感器（46a，46b，46c）的位置编码器的故障检测器。 故障检测器接收来自多个位置传感器的位置信号。 位置信号表示开关磁阻电机的转子位置，并且位置信号具有如果位置编码器正常工作时发生的允许状态和允许的输出状态序列。 如果多个传感器中的一个或多个发生故障或位置编码器的旋转元件损坏，则位置传感器的位置信号发生非法状态。 故障检测器在发生非法状态时产生故障信号。 此外，故障检测器监视输出状态的序列，并且当输出状态在不是允许的序列之一的序列中改变时产生故障。 机器控制器可以响应故障信号停止机器操作或触发替代定位方案。

公开(公告)号：EP0732801A2

公开(公告)日：1996-09-18

申请号：EP95307187.5

申请日：1995-10-11

申请人： A.O. Smith Corporation

发明人： van Sistine, Thomas G.

IPC分类号： H02P6/20

CPC分类号： H02P1/163 ,  H02P6/18 ,  H02P25/0925

摘要： A switched reluctance motor includes a rotor (14) mounted for rotation about an axis (18) and including a plurality of rotor poles (22, 26, 30, 34). A stator (38) surrounds the rotor (14) and includes at least three stator phases. The motor also includes a circuit (94) for controlling the motor, the circuit (94) including a pulse generator (126) for supplying a seek current to each of the phases of the motor without causing rotation of the rotor (14). The seek currents in the phases each have a respective seek current rise time which is a function of the proximity of the rotor poles (22, 26, 30, 34) to the respective phases. The circuit (94) includes a series of counters (110) for measuring the amount of time required for the seek current in each phase to reach a predetermined seek current threshold and a comparator (114) for comparing the seek current rise times and for establishing a priority sequence determined by which of the phases has the lowest seek rise time, the intermediate seek current rise time, and the highest seek current rise time. The circuit (94) also includes a run signal generator (122) connected to the comparator (114) for energizing a selected one of the phases based upon the priority sequence to cause rotation of the rotor (14).

摘要翻译： 电子电动机包括转子，其安装成围绕轴线旋转并且包括多个转子极点。 定子围绕转子并且包括至少三个定子相。 电动机还包括用于控制电动机的电路。 该电路包括脉冲发生器，用于向马达的每个相位提供寻道电流，而不引起转子的旋转。 相中的寻道电流各自具有相应的寻道电流上升时间。 上升时间是转子极接近各相的函数。 该电路包括一系列计数器，用于测量每相中寻找电流达到预定寻找电流阈值所需的时间量。 比较器比较寻找电流上升时间并建立由哪个相位确定的优先顺序具有最低寻找电流上升时间，中间寻道电流上升时间和最高寻道电流上升时间该电路还包括连接的运行信号发生器 涉及根据优先级序列对所选择的一个相位进行激励以使转子旋转的比较结构。

公开(公告)号：EP0105852B1

公开(公告)日：1986-05-07

申请号：EP83850249.0

申请日：1983-09-19

申请人： AKTIEBOLAGET ELECTROLUX

发明人： Moren, Lars Gunnar ,  Berg, Ulf Peter

IPC分类号： H02P1/18 ,  H02K19/06 ,  H02P7/00

CPC分类号： H02K19/06 ,  H02P1/163 ,  H02P25/092 ,  H02P25/0925