-
公开(公告)号：EP1208635A1
公开(公告)日：2002-05-29
申请号：EP00954729.0
申请日：2000-08-17
CPC分类号： H02P1/163 , H02P1/16 , H02P25/08 , H02P25/0925
摘要： An electrical machine comprises a rotor without windings, a stator having an armature winding (24, 25) and a field winding (10) for generating a magnetomotive force in a direction extending transversely of the magnetomotive force generated by the armature winding. An electronic circuit (40) is provided for controlling the current in the armature winding (24, 25) such that periods in which a magnetomotive force in one direction is associated with a first current pulse alternate with periods in which a magnetomotive force in the opposite direction is associated with a second current pulse. A position sensor is provided for monitoring the rotational position of the rotor and for supplying output signals at a rate dependent on the speed of rotation of the rotor. Furthermore a control system supplies control signals to the circuit (40) to control the current in the armature winding (24, 25) in response to the output signals. The control system uses a control signal of extended duration at the beginning of the first current pulse on start-up of the motor from rest as compared with the duration of the control signals produced over the remainder of the first current pulse during acceleration of the rotor. Such an arrangement produces efficient starting from rest, and enables control of acceleration, no-load speed, loaded torque-speed characteristics of the machine to be achieved with simple on-off control of armature and field switching devices, so that the control circuitry can be produced at relatively low cost. Simplification of the control circuitry is further ensured by the fact that such control can be effected without current sensing.
-
公开(公告)号：EP1208636B1
公开(公告)日：2004-01-21
申请号：EP00954730.8
申请日：2000-08-17
CPC分类号： H02P1/163 , H02P1/16 , H02P25/08 , H02P25/0925
摘要： An electrical machine comprises a rotor without windings, a stator having an armature winding (24, 25) and a field winding (10) for generating a magnetomotive force in a direction extending transversely of the magnetomotive force generated by the armature winding. An electronic circuit (40) is provided for controlling the current in the armature winding (24, 25) such that periods in which a magnetomotive force in one direction is associated with a first current pulse alternate with periods in which a magnetomotive force in the opposite direction is associated with a second current pulse. A position sensor is provided for monitoring the rotational position of the rotor and for supplying output signals dependent on the speed of rotation of the rotor. Furthermore a control system (32) supplies control signals to the circuit (40) to control the current in the armature winding (24, 25). In order to enhance the performance at high speed, the control signals are produced in response to sensor output signals which provide an advanced indication of the rotational position of the rotor. Furthermore, in order to prevent oscillation of the rotor on start-up, the control signals supplied to the circuit (40) during an initial start-up period are each produced after a time delay as compared with the production of the control signals over subsequent cycles of rotation during acceleration of the rotor. This can be achieved with simple on/off control of armature and field switching devices, so that the control circuitry can be produced at relatively low cost.
-
公开(公告)号：EP1208635B1
公开(公告)日：2005-11-02
申请号：EP00954729.0
申请日：2000-08-17
CPC分类号： H02P1/163 , H02P1/16 , H02P25/08 , H02P25/0925
-
公开(公告)号：EP1208636A1
公开(公告)日：2002-05-29
申请号：EP00954730.8
申请日：2000-08-17
CPC分类号： H02P1/163 , H02P1/16 , H02P25/08 , H02P25/0925
摘要： An electrical machine comprises a rotor without windings, a stator having an armature winding (24, 25) and a field winding (10) for generating a magnetomotive force in a direction extending transversely of the magnetomotive force generated by the armature winding. An electronic circuit (40) is provided for controlling the current in the armature winding (24, 25) such that periods in which a magnetomotive force in one direction is associated with a first current pulse alternate with periods in which a magnetomotive force in the opposite direction is associated with a second current pulse. A position sensor is provided for monitoring the rotational position of the rotor and for supplying output signals dependent on the speed of rotation of the rotor. Furthermore a control system (32) supplies control signals to the circuit (40) to control the current in the armature winding (24, 25). In order to enhance the performance at high speed, the control signals are produced in response to sensor output signals which provide an advanced indication of the rotational position of the rotor. Furthermore, in order to prevent oscillation of the rotor on start-up, the control signals supplied to the circuit (40) during an initial start-up period are each produced after a time delay as compared with the production of the control signals over subsequent cycles of rotation during acceleration of the rotor. This can be achieved with simple on/off control of armature and field switching devices, so that the control circuitry can be produced at relatively low cost.
摘要翻译： 一种电机包括一个无绕组的转子，一个具有电枢绕组（24,25）和一个励磁绕组（10）的定子，用于在横向于由电枢绕组产生的磁势的方向上产生磁动势。 提供电子电路（40），用于控制电枢绕组（24,25）中的电流，使得一个方向上的磁动势与第一电流脉冲相关联的时段与其中相反的磁动势 方向与第二电流脉冲相关联。 提供位置传感器用于监测转子的旋转位置并提供取决于转子旋转速度的输出信号。 此外，控制系统（32）向电路（40）提供控制信号以控制电枢绕组（24,25）中的电流。 为了提高高速性能，控制信号是响应传感器输出信号而产生的，这些信号提供转子旋转位置的高级指示。 此外，为了防止转子在启动时振荡，在初始启动时段期间提供给电路（40）的控制信号分别在时间延迟后产生，与通过随后的控制信号的产生相比 转子加速期间的旋转循环。 这可以通过电枢和现场开关装置的简单开/关控制来实现，使得控制电路可以以相对低的成本生产。
-
公开(公告)号：EP0836763B1
公开(公告)日：2001-06-20
申请号：EP96922147.2
申请日：1996-07-04
发明人： POLLOCK, Charles , BARNES, Mike
CPC分类号： B60L11/1803 , B60L11/1801 , B60L11/1811 , B60L11/1814 , B60L11/1816 , B60L15/007 , B60L2200/12 , B60L2200/34 , B60L2220/18 , B60L2220/54 , H02J7/02 , H02J7/025 , H02P25/08 , Y02T10/641 , Y02T10/644 , Y02T10/645 , Y02T10/7005 , Y02T10/7072 , Y02T10/92 , Y02T90/127 , Y02T90/14
摘要： PCT No. PCT/GB96/01597 Sec. 371 Date Feb. 23, 1998 Sec. 102(e) Date Feb. 23, 1998 PCT Filed Jul. 4, 1996 PCT Pub. No. WO97/02649 PCT Pub. Date Jan. 23, 1997A switched reluctance electrical machine system including a switched reluctance machine, a rechargeable DC energy store and principle voltage terminals connectable to an external power source. The switched reluctance machine comprises a rotor, a stator and windings wherein the windings include at least two closely-coupled coils and a power converter for controlling current flow in the windings. The power converter has first and second circuits. The first circuit contains one of the closely-coupled coils and the principle voltage terminals while the second circuit contains the other of the closely-coupled coils and the energy store. A first switching arrangement is connected in series with the coils in the first circuit and a second switching arrangement is connected in series with the coils in the second circuit. An electronic controller controls the switching arrangements so that, in a first operational mode, current flows in one direction in the coils during normal machine operation and, in a second operational mode, current flows in the coils in the opposite direction to charge the energy store from an external power source.
-
公开(公告)号：EP0700594A1
公开(公告)日：1996-03-13
申请号：EP94917721.0
申请日：1994-05-27
发明人： WU, Chi Yao , POLLOCK, Charles
IPC分类号： H02P25
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：EP0916178B1
公开(公告)日：2002-10-02
申请号：EP97933764.9
申请日：1997-07-28
-
公开(公告)号：EP0916178A1
公开(公告)日：1999-05-19
申请号：EP97933764.0
申请日：1997-07-28
摘要： An electrical machine comprises a four-pole stator (2) provided with a field winding (10) and an armature winding (11), each of the windings (10, 11) being split into two coils (22, 23 or 24, 25) closely coupled and wound so that diametrically opposite portions of both coils are disposed within diametrically opposite stator slots. A two-pole rotor (not shown) without windings is rotatable within the stator (2), and a circuit is provided for energising the armature coils (24 and 25) when direct current is supplied to terminals (26 and 27) of the circuit. Switches (28 and 29) in series with the coils (24 and 25) are switched alternately to effect alternate energisation of the coils (24 and 25) so as to generate, as a result of the opposite winding of the coils, magnetomotive forces in opposite directions. Since each of the closely coupled coils (24 and 25) generates a magnetomotive force in a respective direction, each coil needs to be energised with current in only one direction so that a relatively simple excitation circuit can be used.
-
公开(公告)号：EP0836763A1
公开(公告)日：1998-04-22
申请号：EP96922147.0
申请日：1996-07-04
发明人： POLLOCK, Charles , BARNES, Mike
CPC分类号： B60L11/1803 , B60L11/1801 , B60L11/1811 , B60L11/1814 , B60L11/1816 , B60L15/007 , B60L2200/12 , B60L2200/34 , B60L2220/18 , B60L2220/54 , H02J7/02 , H02J7/025 , H02P25/08 , Y02T10/641 , Y02T10/644 , Y02T10/645 , Y02T10/7005 , Y02T10/7072 , Y02T10/92 , Y02T90/127 , Y02T90/14
摘要： PCT No. PCT/GB96/01597 Sec. 371 Date Feb. 23, 1998 Sec. 102(e) Date Feb. 23, 1998 PCT Filed Jul. 4, 1996 PCT Pub. No. WO97/02649 PCT Pub. Date Jan. 23, 1997A switched reluctance electrical machine system including a switched reluctance machine, a rechargeable DC energy store and principle voltage terminals connectable to an external power source. The switched reluctance machine comprises a rotor, a stator and windings wherein the windings include at least two closely-coupled coils and a power converter for controlling current flow in the windings. The power converter has first and second circuits. The first circuit contains one of the closely-coupled coils and the principle voltage terminals while the second circuit contains the other of the closely-coupled coils and the energy store. A first switching arrangement is connected in series with the coils in the first circuit and a second switching arrangement is connected in series with the coils in the second circuit. An electronic controller controls the switching arrangements so that, in a first operational mode, current flows in one direction in the coils during normal machine operation and, in a second operational mode, current flows in the coils in the opposite direction to charge the energy store from an external power source.
摘要翻译： 开关磁阻电机系统具有电机，可再充电DC能量存储器（7），主电压端子（5,6）和控制器。 在机器是电动机的情况下，能够从DC能量存储器（7）以及从AC电源驱动电动机以及从AC电源为能量存储器（7）再充电是有利的。 充电所需的充电器由形成机器绕组的一对紧密耦合的线圈（2,3）以及具有包含线圈（2）的第一电路（9）和功率转换器 主电压端子（5,6）和具有线圈（3）和DC能量存储器（7）的第二电路（14），每个电路（9,14）包括开关（12,12'）的电子开关装置， ）和二极管（13,13'），该二极管反并联并且与线圈（2,3）串联连接以使电流能够在任一方向上流过每个线圈。 控制器操作转换器（4）的开关（12,12'）以提供所需的操作模式，而不需要手动重新配置系统。 充电器因此由现有组件形成，并且整个系统具有灵活性，使得机器也可以充当发电机。
-
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
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.
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.016 秒)
