CN104935138A - Noise reduction and vibration reduction structure and method for switched reluctance motor - Google Patents
Noise reduction and vibration reduction structure and method for switched reluctance motor Download PDFInfo
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Abstract
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技术领域 technical field
本发明一种开关磁阻电机降噪减振结构及方法，用于降低开关磁阻电机的振动与噪声。 The invention discloses a structure and method for reducing noise and vibration of a switched reluctance motor, which is used for reducing the vibration and noise of the switched reluctance motor.
背景技术 Background technique
开关磁阻电机是利用磁阻最小原理，即磁通总是沿磁阻最小的路径闭合，利用定转子磁极之间的环向电磁力牵引转子旋转。然而，开关磁阻电机定转子之间除了驱动转子旋转的环向电磁力之外，还存在径向电磁力分量，其导致的定子椭圆变形是开关磁阻电机运行时振动与噪声较大的主要原因，这一问题制约了开关磁阻电机的广泛应用。 The switched reluctance motor uses the principle of minimum reluctance, that is, the magnetic flux is always closed along the path with the minimum reluctance, and the rotor is driven to rotate by the circular electromagnetic force between the stator and rotor poles. However, in addition to the circumferential electromagnetic force that drives the rotor to rotate, there is also a radial electromagnetic force component between the stator and rotor of the switched reluctance motor. This problem restricts the wide application of switched reluctance motors.
开关磁阻电机为双凸极结构，定子轭部较薄，高速运转时定子绕组中通入的是脉冲电流，产生脉冲转矩，依靠电磁力牵引转子转动。与传统中低转速电机相比，开关磁阻电机具有结构简单坚固、高功率密度、高容错性及高可靠性等特点，且其能适应高温等恶劣运行环境，因而在军事和民用领域有着良好的应用前景。然而，开关磁阻电机在运行过程中，除了产生牵引转子转动的环向电磁力之外，亦会产生一个径向电磁力分量；定转子之间的径向电磁力所致的定子椭圆变形是激发定子振动和噪声的主要来源。因此，减小径向电磁力是开关磁阻电机降噪减振的最有效的方法之一。 The switched reluctance motor has a double salient pole structure, and the stator yoke is thin. When the stator is running at high speed, the pulse current is passed into the stator winding to generate pulse torque, and the rotor is driven to rotate by electromagnetic force. Compared with traditional medium and low speed motors, switched reluctance motors have the characteristics of simple and firm structure, high power density, high fault tolerance and high reliability, and they can adapt to harsh operating environments such as high temperature, so they have a good reputation in military and civilian fields. application prospects. However, during the operation of the switched reluctance motor, in addition to the hoop electromagnetic force that pulls the rotor to rotate, it also generates a radial electromagnetic force component; the elliptical deformation of the stator caused by the radial electromagnetic force between the stator and rotor is Main source of excited stator vibration and noise. Therefore, reducing the radial electromagnetic force is one of the most effective methods for reducing noise and vibration of switched reluctance motors.
中国专利《降低噪音和转矩脉动的开关磁阻电动机》（专利号ZL 200520130139.4）提出一种由多层级联同轴安排的多个单相开关磁阻电动机构成的开关磁阻电动机构成的开关磁阻电动机，其通过在圆周上分散径向电磁力的方法降低噪音。然而这一专利并没有从本质上减小径向电磁力。 The Chinese patent "Switched Reluctance Motor for Reducing Noise and Torque Ripple" (Patent No. ZL 200520130139.4) proposes a switched reluctance motor composed of multiple single-phase switched reluctance motors arranged in multi-layer cascade coaxial arrangement. Resistance motor, which reduces noise by distributing radial electromagnetic force on the circumference. However, this patent does not substantially reduce the radial electromagnetic force.
中国专利《开关磁阻电机的降振减噪转子结构》（公开号 CN 101667757A）提出一种开关磁阻电机的降振减噪转子结构，其可以降低因为电机转子转动过程中达到转子沿与定子极沿重合时引起的径向电磁力。然而这一减小径向电磁力的方法仅从转子结构出发，减小的幅度并不明显。 The Chinese patent "Switched Reluctance Motor's Rotor Structure for Vibration and Noise Reduction" (publication number CN 101667757A) proposes a rotor structure for reducing vibration and noise of a switched reluctance motor, which can reduce the vibration caused by the rotor edge and the stator during the rotation of the motor rotor. The radial electromagnetic force caused by the coincidence of the poles. However, this method of reducing the radial electromagnetic force only starts from the structure of the rotor, and the magnitude of the reduction is not obvious.
发明内容 Contents of the invention
本发明提供了一种开关磁阻电机降噪减振方法，通过增加定子极对数以增大气隙磁通和环向电磁力，同时通过提前关断定子绕组电流以减小径向电磁力，这样既能增加开关磁阻电机的电磁转矩，又能减小开关磁阻电机的振动与噪声。本发明还提供了一种实现开关磁阻电机降噪减振的结构，主要包括定子、转子、定子磁极、转子磁极及定子绕组等，其中定子磁极的极对数为大于等于5的奇数，转子磁极的极对数为2。本发明提供的开关磁阻电机可在增加开关磁阻电机电磁转矩的同时，减小定转子之间的径向电磁力，可有效减小开关磁阻电机的振动与噪声。 The invention provides a noise reduction and vibration reduction method for a switched reluctance motor. The air gap magnetic flux and the circumferential electromagnetic force are increased by increasing the number of stator pole pairs, and the radial electromagnetic force is reduced by cutting off the stator winding current in advance. This can not only increase the electromagnetic torque of the switched reluctance motor, but also reduce the vibration and noise of the switched reluctance motor. The present invention also provides a structure for realizing noise reduction and vibration reduction of switched reluctance motors, which mainly includes stator, rotor, stator magnetic poles, rotor magnetic poles and stator windings, etc., wherein the number of pole pairs of stator magnetic poles is an odd number greater than or equal to 5, and the rotor The number of pole pairs of the magnetic poles is 2. The switched reluctance motor provided by the invention can increase the electromagnetic torque of the switched reluctance motor while reducing the radial electromagnetic force between the stator and the rotor, and can effectively reduce the vibration and noise of the switched reluctance motor.
本发明采取的技术方案为： The technical scheme that the present invention takes is:
一种开关磁阻电机降噪减振结构，开关磁阻电机的定子磁极的极对数Ns为大于等于5的奇数；开关磁阻电机的转子磁极的极对数Nr为2。 A switched reluctance motor noise reduction and vibration reduction structure, the number of pole pairs Ns of the stator magnetic poles of the switched reluctance motor is an odd number greater than or equal to 5; the number of pole pairs Nr of the rotor magnetic poles of the switched reluctance motor is 2.
一种开关磁阻电机降噪减振方法，增加开关磁阻电机的定子磁极的极对数Ns，以增大气隙磁通和环向电磁力；同时通过提前关断定子绕组电流以减小径向电磁力。 A method for noise reduction and vibration reduction of a switched reluctance motor, which increases the number of pole pairs Ns of the stator poles of the switched reluctance motor to increase the air gap magnetic flux and the hoop electromagnetic force; at the same time, the stator winding current is cut off in advance to reduce the diameter to the electromagnetic force.
一种开关磁阻电机降噪减振方法，当定子磁极的轴线与转子磁极的轴线之间的夹角α小于等于π/N s且大于π/2N s时，导通定子绕组电流； A method for noise reduction and vibration reduction of a switched reluctance motor, when the angle α between the axis of the stator magnetic pole and the axis of the rotor magnetic pole is less than or equal to π/ N s and greater than π/2 N s , the stator winding current is turned on;
当定子磁极的轴线与转子磁极的轴线之间的夹角α小于等于π/20N s且大于0时，关断定子绕组电流。 When the angle α between the axis of the stator pole and the axis of the rotor pole is less than or equal to π/20 N s and greater than 0, the stator winding current is turned off.
一种开关磁阻电机降噪减振方法，定子绕组通流时，转子转过的角度大于等于π/2N s。 A method for noise reduction and vibration reduction of a switched reluctance motor. When the stator winding is flowing, the rotor rotates at an angle greater than or equal to π/2 N s .
本发明一种开关磁阻电机降噪减振结构及方法，技术效果如下： The present invention provides a structure and method for reducing noise and vibration of a switched reluctance motor, and the technical effects are as follows:
1）、通过增加开关磁阻电机的定子磁极的极对数，使定子绕组通电时，定子磁极与转子磁极的轴线距离小，磁通密度增大，可有效增大环向电磁力，达到增加电磁转矩的目的。 1) By increasing the number of pole pairs of the stator poles of the switched reluctance motor, when the stator winding is energized, the axial distance between the stator poles and the rotor poles is small, and the magnetic flux density increases, which can effectively increase the hoop electromagnetic force and achieve an increase The purpose of electromagnetic torque.
2）、通过提前关断定子绕组电流以减小径向电磁力，以达到降振减噪的目的。 2) By cutting off the stator winding current in advance to reduce the radial electromagnetic force to achieve the purpose of reducing vibration and noise.
3）、定子绕组通流时，转子转过的角度大于等于π/2Ns。可保证每一个周期内总有定子绕组通电，使电磁力不间断。 3) When the stator winding is flowing, the rotor turns at an angle greater than or equal to π/2Ns. It can ensure that the stator winding is always energized in each cycle, so that the electromagnetic force is uninterrupted.
4）、开关磁阻电机的定子磁极的极对数的增多，使定子磁极与转子磁极的轴线距离小，磁通密度增大，可提高开关磁阻电机的运行效率。 4) The increase in the number of pole pairs of the stator poles of the switched reluctance motor makes the axial distance between the stator poles and the rotor poles smaller, and the magnetic flux density increases, which can improve the operating efficiency of the switched reluctance motor.
附图说明 Description of drawings
图 1 为开关磁阻电机结构示意图，图1 包括图1(a)、图1(b)两幅小图，其中：图1(a)为五相10/4开关磁阻电机结构示意图；图1(b)为七相14/4 开关磁阻电机结构示意图。 Figure 1 is a schematic diagram of the structure of the switched reluctance motor, and Figure 1 includes two small pictures of Figure 1(a) and Figure 1(b), in which: Figure 1(a) is a schematic diagram of the structure of a five-phase 10/4 switched reluctance motor; 1(b) is a schematic diagram of the structure of a seven-phase 14/4 switched reluctance motor.
图2 为五相10/4 开关磁阻电机定子通流时转子旋转角度等于π/2Ns 的电机运行示意图，图2 包括图2(a)~ 图2(f) 六幅小图，其中：图2(a)为五相10/4 开关磁阻电机αA=20°时A 相绕组导通时刻；图2(b)为五相10/4 开关磁阻电机αD=20°时D 相绕组导通、A 相绕组关断时刻；图2(c)为五相10/4 开关磁阻电机αB=20°时B 相绕组导通、D 相绕组关断时刻；图2(d)为五相10/4 开关磁阻电机αE=20°时E 相绕组导通、B 相绕组关断时刻；图2(e)为五相10/4 开关磁阻电机αC=20°时C 相绕组导通、E 相绕组关断时刻；图2(f)为五相10/4 开关磁阻电机αA=20°时A 相绕组导通、C 相绕组关断时刻。 Figure 2 is a schematic diagram of the operation of the motor with the rotor rotation angle equal to π/2Ns when the stator of the five-phase 10/4 switched reluctance motor is flowing. Figure 2 includes six small pictures from Figure 2(a) to Figure 2(f), where: 2(a) is the conduction moment of the A-phase winding of the five-phase 10/4 switched reluctance motor when αA=20°; Fig. 2(b) is the conduction moment of the D-phase winding of the five-phase 10/4 switched reluctance motor when αD=20° Turn-on and turn-off moments of the A-phase winding; Figure 2(c) is the moment when the B-phase winding is turned on and the D-phase winding is turned off when the five-phase 10/4 switched reluctance motor αB=20°; Figure 2(d) is the five-phase When the 10/4 switched reluctance motor αE=20°, the E-phase winding is turned on and the B-phase winding is turned off; Figure 2(e) shows the phase C winding of the five-phase 10/4 switched reluctance motor when αC=20°. , Turn-off time of phase E winding; Figure 2(f) shows the time when the phase A winding is turned on and the phase C winding is turned off when αA=20° of the five-phase 10/4 switched reluctance motor.
图3 为七相14/4 开关磁阻电机定子通流时转子旋转角度大于π/2Ns 的电机运行示意图，图3 包括图3(a)~ 图3(o)共 15 幅小图，其中： Figure 3 is a schematic diagram of the operation of a seven-phase 14/4 switched reluctance motor with a rotor rotation angle greater than π/2Ns when the stator is flowing. Figure 3 includes a total of 15 small pictures from Figure 3(a) to Figure 3(o), among which:
图3(a)为七相14/4 开关磁阻电机αA=18°时A 相绕组导通时刻。 Figure 3(a) shows the conduction moment of the A-phase winding of the seven-phase 14/4 switched reluctance motor when αA=18°.
图3(b)为七相14/4 开关磁阻电机αE=18°时E 相绕组导通时刻。 Figure 3(b) shows the conduction moment of the E-phase winding of the seven-phase 14/4 switched reluctance motor when αE=18°.
图3(c)为七相14/4 开关磁阻电机αA=2°时A 相绕组关断时刻。 Figure 3(c) shows the turn-off moment of the A-phase winding of the seven-phase 14/4 switched reluctance motor when αA=2°.
图3(d)为七相14/4 开关磁阻电机αB=18°时B 相绕组导通时刻。 Figure 3(d) shows the turn-on moment of the B-phase winding of the seven-phase 14/4 switched reluctance motor when αB=18°.
图3(e)为七相14/4 开关磁阻电机αE=2°时E 相绕组关断时刻。 Figure 3(e) shows the turn-off time of the E-phase winding of the seven-phase 14/4 switched reluctance motor when αE=2°.
图3(f)为七相14/4 开关磁阻电机αF=18°时F 相绕组导通时刻。 Figure 3(f) shows the turn-on moment of the F-phase winding of the seven-phase 14/4 switched reluctance motor when αF=18°.
图3(g)为七相14/4 开关磁阻电机αB=2°时B 相绕组关断时刻。 Figure 3(g) shows the turn-off time of the B-phase winding of the seven-phase 14/4 switched reluctance motor when αB=2°.
图3(h)为七相14/4 开关磁阻电机αC=18°时C 相绕组导通时刻。 Figure 3(h) shows the conduction moment of the C-phase winding of the seven-phase 14/4 switched reluctance motor when αC=18°.
图3(i)为七相14/4 开关磁阻电机αF=2°时F 相绕组关断时刻。 Figure 3(i) shows the turn-off time of the F-phase winding of the seven-phase 14/4 switched reluctance motor when αF=2°.
图3(j)为七相14/4 开关磁阻电机αG=18°时G 相绕组导通时刻。 Figure 3(j) shows the turn-on moment of the G-phase winding of the seven-phase 14/4 switched reluctance motor when αG=18°.
图3(k)为七相14/4 开关磁阻电机αC=2°时C 相绕组关断时刻。 Figure 3(k) shows the turn-off time of the C-phase winding of the seven-phase 14/4 switched reluctance motor when αC=2°.
图3(l)为七相14/4 开关磁阻电机αD=18°时D 相绕组导通时刻。 Figure 3(l) shows the conduction moment of the D-phase winding of the seven-phase 14/4 switched reluctance motor when αD=18°.
图3(m)为七相14/4 开关磁阻电机αG=2°时G 相绕组关断时刻。 Figure 3(m) shows the turn-off time of the G-phase winding of the seven-phase 14/4 switched reluctance motor when αG=2°.
图3(n)为七相14/4 开关磁阻电机αA=18°时A 相绕组导通时刻。 Figure 3(n) shows the conduction moment of the A-phase winding of the seven-phase 14/4 switched reluctance motor when αA=18°.
图3(o)为七相14/4 开关磁阻电机αD=2°时D 相绕组关断时刻。 Figure 3(o) shows the turn-off time of the D-phase winding of the seven-phase 14/4 switched reluctance motor when αD=2°.
其中：1 表示定子；2 表示转子；3 表示定子磁极；4 表示转子磁极； Among them: 1 means the stator; 2 means the rotor; 3 means the stator pole; 4 means the rotor pole;
α 表示定子绕组轴线与最近转子磁极轴线之间的夹角； α represents the angle between the axis of the stator winding and the axis of the nearest rotor pole;
αA 表示 A 相绕组轴线与最近转子磁极轴线之间的夹角； αA represents the angle between the phase A winding axis and the nearest rotor pole axis;
αB 表示B 相绕组轴线与最近转子磁极轴线之间的夹角； αB represents the angle between the phase B winding axis and the nearest rotor pole axis;
αC 表示 C 相绕组轴线与最近转子磁极轴线之间的夹角； αC represents the angle between the phase C winding axis and the nearest rotor pole axis;
αD 表示D 相绕组轴线与最近转子磁极轴线之间的夹角； αD represents the angle between the D-phase winding axis and the nearest rotor pole axis;
αE 表示 E 相绕组轴线与最近转子磁极轴线之间的夹角； αE represents the angle between the phase E winding axis and the nearest rotor pole axis;
αF 表示F 相绕组轴线与最近转子磁极轴线之间的夹角； αF represents the angle between the F-phase winding axis and the nearest rotor pole axis;
αG 表示 G 相绕组轴线与最近转子磁极轴线之间的夹角。 αG represents the angle between the G-phase winding axis and the nearest rotor pole axis.
具体实施方式 Detailed ways
开关磁阻电机包括定子1、转子2、定子磁极3、转子磁极4、定子绕组等。一种开关磁阻电机降噪减振结构，开关磁阻电机的定子磁极3的极对数Ns为大于等于5的奇数；开关磁阻电机的转子磁极4的极对数Nr为2。 A switched reluctance motor includes a stator 1, a rotor 2, a stator pole 3, a rotor pole 4, a stator winding, and the like. A switched reluctance motor noise reduction and vibration reduction structure, the number of pole pairs Ns of the stator magnetic pole 3 of the switched reluctance motor is an odd number greater than or equal to 5; the number of pole pairs Nr of the rotor magnetic pole 4 of the switched reluctance motor is 2.
一种开关磁阻电机降噪减振方法，增加开关磁阻电机的定子磁极3的极对数Ns，以增大气隙磁通和环向电磁力；同时通过提前关断定子绕组电流以减小径向电磁力。 A method for noise reduction and vibration reduction of a switched reluctance motor, which increases the number of pole pairs Ns of the stator pole 3 of the switched reluctance motor to increase the air gap magnetic flux and the hoop electromagnetic force; at the same time, the stator winding current is cut off in advance to reduce the radial electromagnetic force.
一种开关磁阻电机降噪减振方法，当定子磁极3的轴线与转子磁极4的轴线之间的夹角α小于等于π/Ns且大于π/2Ns时，导通定子绕组电流。当定子磁极3的轴线与转子磁极4的轴线之间的夹角α小于等于π/20Ns且大于0时，关断定子绕组电流。 A noise reduction and vibration reduction method for a switched reluctance motor. When the angle α between the axis of the stator pole 3 and the axis of the rotor pole 4 is less than or equal to π/Ns and greater than π/2Ns, the stator winding current is turned on. When the angle α between the axis of the stator pole 3 and the axis of the rotor pole 4 is less than or equal to π/20Ns and greater than 0, the stator winding current is turned off.
定子绕组通流时，转子2转过的角度大于等于π/2Ns。 When the stator winding flows through, the rotor 2 rotates through an angle greater than or equal to π/2Ns.
实施例1： Example 1:
图1（a）为五相10/4开关磁阻电机结构示意图，定子磁极的极对数为5，转子磁极的极对数为2。图2为这一电机定子通流时转子旋转角度等于π/2Ns的电机运行原理。首先，当检测到αA=20°时（图2（a）所示位置），A相绕组导通，产生电磁力驱动转子旋转；当转子旋转到αD=20°时（（图2（b）所示位置）），A相绕组关断、同时D相绕组导通，D相绕组产生电磁力驱动转子继续旋转；当转子旋转到αB=20°时（图2（c）所示位置），D相绕组关断、同时B相绕组导通，B相绕组产生电磁力驱动转子继续旋转；当转子旋转到αE=20°时（图2（d）所示位置），B相绕组关断、同时E相绕组导通，E相绕组产生电磁力驱动转子继续旋转；当转子旋转到αC=20°时（图2（e）所示位置），E相绕组关断、同时C相绕组导通，C相绕组产生电磁力驱动转子继续旋转；当转子旋转到αA=20°时（（图2（f）所示位置）），C相绕组关断、同时A相绕组导通，A相绕组产生电磁力驱动转子继续旋转；这样不停的重复上述过程，转子便持续地旋转。与传统开关磁阻电机相比，因定子极对数增多，αA=20°时（图2（a）所示位置）A相绕组即导通，此时定转子之间的磁路短，磁阻小，在相同励磁条件下可以获得更大的气隙磁通和电磁力，进而达到增大开关磁阻电机电磁转矩的目的。传统开关磁阻电机定子绕组电流关断点通常为αA=0°；本发明中，当转子旋转到αD=20°时（（图2（b）所示位置））A相绕组即关断，此时αA=2°；因为随着αA的减小，环向电磁力减小，径向电磁力急速增大，故本发明在αA=2°时提前关断定子绕组电流以抑制径向电磁力的增大，达到减小开关磁阻电机的振动与噪声的效果。 Figure 1(a) is a schematic diagram of the structure of a five-phase 10/4 switched reluctance motor. The number of pole pairs of the stator poles is 5, and the number of pole pairs of the rotor poles is 2. Figure 2 shows the operating principle of the motor whose rotor rotation angle is equal to π/2Ns when the motor stator is flowing. First, when αA=20° is detected (the position shown in Figure 2(a)), the phase A winding is turned on, generating electromagnetic force to drive the rotor to rotate; when the rotor rotates to αD=20° ((Figure 2(b) The position shown)), the A-phase winding is turned off, and the D-phase winding is turned on at the same time, and the D-phase winding generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αB=20° (the position shown in Figure 2(c)), The D-phase winding is turned off, while the B-phase winding is turned on, and the B-phase winding generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αE=20° (the position shown in Figure 2(d)), the B-phase winding is turned off, At the same time, the E-phase winding is turned on, and the E-phase winding generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αC=20° (the position shown in Figure 2(e)), the E-phase winding is turned off, and the C-phase winding is turned on , the C-phase winding generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αA=20° ((the position shown in Figure 2(f))), the C-phase winding is turned off, and the A-phase winding is turned on, and the A-phase winding Electromagnetic force is generated to drive the rotor to continue to rotate; in this way, the above process is repeated continuously, and the rotor continues to rotate. Compared with the traditional switched reluctance motor, due to the increase in the number of pole pairs of the stator, when αA=20° (the position shown in Figure 2(a)), the A-phase winding is turned on, and the magnetic circuit between the stator and the rotor is short at this time, and the magnetic The resistance is small, and under the same excitation conditions, greater air gap flux and electromagnetic force can be obtained, thereby achieving the purpose of increasing the electromagnetic torque of the switched reluctance motor. The current cut-off point of the stator winding of the traditional switched reluctance motor is usually αA=0°; in the present invention, when the rotor rotates to αD=20° ((the position shown in Figure 2(b))) the A-phase winding is turned off, At this time αA=2°; because the circumferential electromagnetic force decreases and the radial electromagnetic force increases rapidly with the decrease of αA, the present invention cuts off the stator winding current in advance when αA=2° to suppress the radial electromagnetic force. The increase of force can achieve the effect of reducing the vibration and noise of the switched reluctance motor.
实施例2： Example 2:
图1（b）为七相14/4开关磁阻电机结构示意图，定子磁极的极对数为7，转子磁极的极对数为2。图2为这一电机定子通流时转子旋转角度大于π/2Ns的电机运行原理。首先，当检测到αA=18°时（图3（a）所示位置），A相绕组导通，产生电磁力驱动转子旋转；当转子旋转到αE=18°时（图3（b）所示位置），E相绕组导通，此时A、E相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αA=2°时（图3（c）所示位置），A相绕组关断，E相绕组单独产生电磁力驱动转子继续旋转；当转子旋转到αB=18°时（图3（d）所示位置），B相绕组导通，此时B、E相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αE=2°时（图3（e）所示位置），E相绕组关断，B相绕组单独产生电磁力驱动转子继续旋转；当转子旋转到αF=18°时（图3（f）所示位置），F相绕组导通，此时B、F相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αB=2°时（图3（g）所示位置），B相绕组关断，F相绕组单独产生电磁力驱动转子继续旋转；当转子旋转到αC=18°时（图3（h）所示位置），C相绕组导通，此时C、F相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αF=2°时（图3（i）所示位置），F相绕组关断，C相绕组单独产生电磁力驱动转子继续旋转；当转子旋转到αG=18°时（图3（j）所示位置），G相绕组导通，此时C、G相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αC=2°时（图3（k）所示位置），C相绕组关断，G相绕组单独产生电磁力驱动转子继续旋转；当转子旋转到αD=18°时（图3（l）所示位置），D相绕组导通，此时D、G相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αG=2°时（图3（m）所示位置），G相绕组关断，D相绕组单独产生电磁力驱动转子继续旋转；当转子旋转到αA=18°时（图3（n）所示位置），A相绕组导通，此时A、D相绕组同时产生电磁力驱动转子继续旋转；当转子旋转到αD=2°时（图3（o）所示位置），D相绕组关断，A相绕组单独产生电磁力驱动转子继续旋转；这样不停的重复上述过程，转子便持续地旋转。与传统开关磁阻电机相比，因定子极对数增多，αA=18°时（图3（a）所示位置）A相绕组即导通，此时定转子之间的磁路短，磁阻小，在相同励磁条件下可以获得更大的气隙磁通和电磁力，进而达到增大开关磁阻电机电磁转矩的目的。传统开关磁阻电机定子绕组电流关断点通常为αA=0°；本发明中，当转子旋转到αA=2°时（（图3（b）所示位置））A相绕组即关断；因为随着αA的减小，环向电磁力减小，径向电磁力急速增大，故本发明在αA=0°提前关断定子绕组电流以减小径向电磁力，达到减小开关磁阻电机的振动与噪声的效果。 Figure 1(b) is a schematic diagram of the structure of a seven-phase 14/4 switched reluctance motor. The number of pole pairs of the stator poles is 7, and the number of pole pairs of the rotor poles is 2. Figure 2 shows the operating principle of the motor whose rotor rotation angle is greater than π/2Ns when the stator is flowing. First, when αA=18° is detected (the position shown in Figure 3(a)), the phase A winding is turned on, generating electromagnetic force to drive the rotor to rotate; when the rotor rotates to αE=18° (as shown in Figure 3(b) position), the E-phase winding is turned on, and the A and E-phase windings simultaneously generate electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αA=2° (the position shown in Figure 3(c)), the A-phase winding is turned off When the rotor is rotated to αB=18° (the position shown in Figure 3(d)), the phase B winding is turned on, and at this time, the B and E phase windings simultaneously generate electromagnetic force. The force drives the rotor to continue to rotate; when the rotor rotates to αE=2° (the position shown in Figure 3(e)), the E-phase winding is turned off, and the B-phase winding alone generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αF= At 18° (the position shown in Figure 3(f)), the F-phase winding is turned on, and at this time, the B and F-phase windings simultaneously generate electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αB=2° (Figure 3(g )), the B-phase winding is turned off, and the F-phase winding alone generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αC=18° (the position shown in Figure 3(h)), the C-phase winding is turned on, At this time, the C and F phase windings simultaneously generate electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αF=2° (the position shown in Figure 3(i)), the F phase winding is turned off, and the C phase winding alone generates electromagnetic force to drive The rotor continues to rotate; when the rotor rotates to αG=18° (the position shown in Figure 3(j)), the G-phase winding is turned on, and at this time, the C and G-phase windings simultaneously generate electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to When αC=2° (the position shown in Figure 3(k)), the C-phase winding is turned off, and the G-phase winding alone generates electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αD=18° (as shown in Figure 3(l) position), the D-phase winding is turned on, and the D and G-phase windings simultaneously generate electromagnetic force to drive the rotor to continue to rotate; when the rotor rotates to αG=2° (the position shown in Figure 3 (m)), the G-phase winding is turned off When the rotor rotates to αA=18° (the position shown in Figure 3(n)), the A-phase winding is turned on, and the A and D-phase windings simultaneously generate electromagnetic force. The force drives the rotor to continue to rotate; when the rotor rotates to αD=2° (the position shown in Figure 3(o)), the D-phase winding is turned off, and the A-phase winding alone generates electromagnetic force to drive the rotor to continue to rotate; thus repeating the above process, the rotor will continue to rotate. Compared with the traditional switched reluctance motor, due to the increase in the number of stator pole pairs, when αA=18° (the position shown in Figure 3 (a)), the A-phase winding is turned on, and the magnetic circuit between the stator and rotor is short at this time, and the magnetic The resistance is small, and under the same excitation conditions, greater air gap flux and electromagnetic force can be obtained, thereby achieving the purpose of increasing the electromagnetic torque of the switched reluctance motor. The current cut-off point of the stator winding of the traditional switched reluctance motor is usually αA=0°; in the present invention, when the rotor rotates to αA=2° ((the position shown in Figure 3(b))) the A-phase winding is turned off; Because with the decrease of αA, the circumferential electromagnetic force decreases, and the radial electromagnetic force increases rapidly, so the present invention cuts off the stator winding current in advance at αA=0° to reduce the radial electromagnetic force, so as to reduce the switching magnetic force. The effect of preventing vibration and noise of the motor.
Claims (4)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181303A (en) * | 2020-02-21 | 2020-05-19 | 苏州行至动力技术有限公司 | Shock-absorbing noise-reducing switched reluctance hub motor control system and working method thereof |
| CN116799980A (en) * | 2023-06-26 | 2023-09-22 | 上海理工大学 | Vibration reduction type stator modularized switch reluctance motor |
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| US5969454A (en) * | 1995-10-19 | 1999-10-19 | Tridelta Industries, Inc. | Switched reluctance motor |
| CN101404474A (en) * | 2008-11-11 | 2009-04-08 | 河北工业大学 | Operation method and implementing apparatus for switch reluctance motor |
| CN101847919A (en) * | 2008-11-14 | 2010-09-29 | 株式会社电装 | Has the reluctance motor that improves stator structure |
| CN204538924U (en) * | 2015-04-13 | 2015-08-05 | 三峡大学 | A kind of switched reluctance machines noise-reducing vibration-damping structure |
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| EP0571314A2 (en) * | 1992-05-18 | 1993-11-24 | Emerson Electric Co. | Redundant switched reluctance motor |
| US5969454A (en) * | 1995-10-19 | 1999-10-19 | Tridelta Industries, Inc. | Switched reluctance motor |
| CN101404474A (en) * | 2008-11-11 | 2009-04-08 | 河北工业大学 | Operation method and implementing apparatus for switch reluctance motor |
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| CN111181303A (en) * | 2020-02-21 | 2020-05-19 | 苏州行至动力技术有限公司 | Shock-absorbing noise-reducing switched reluctance hub motor control system and working method thereof |
| CN116799980A (en) * | 2023-06-26 | 2023-09-22 | 上海理工大学 | Vibration reduction type stator modularized switch reluctance motor |
| CN116799980B (en) * | 2023-06-26 | 2024-05-07 | 上海理工大学 | Vibration reduction type stator modularized switch reluctance motor |
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