33results about How to "High speed adaptability" patented technology

The invention relates to a bearingless switched reluctance motor with a composite rotor structure and belongs to the field of magnetic levitation switched reluctance motors of motors, a set of windings are wound on stator teeth of a stator; rotors consist of a torque rotor and a levitation force rotor; the torque rotor and the levitation force rotor are arranged in the stator in an axial superposition manner; the torque rotor is used for generating the torque; the levitation force rotor is used for generating a levitation force and part of torque. According to the bearingless switched reluctance motor provided by the invention, only one winding is wound on the stator teeth; and compared with the traditional dual-winding bearingless switched reluctance motor, the bearingless switched reluctance motor disclosed by the invention has the advantages that the structure is simple, the coil space factor is high, copper and silicon steel sheets are saved and the manufacturing cost of a motor can be reduced. In the structure, the levitation force and the torque are decoupled, a control method is simple and the levitation performance of the motor is good. The levitation control is realized by using a smallest inductance zone; the influence of levitation current on torque current is small; and the alternate coupling action is small. In addition, the bearingless switched reluctance motor has the characteristics of high utilization rate of the winding, high power density and strong high-speed adaptability.

The invention discloses a three-freedom-degree magnetic levitation switch reluctance motor of a 12 / 4 pole structure. One three-phase 12 / 4 pole radial magnetic field bearing-free switch reluctance motor and two three-phase 12 / 4 pole axial magnetic field bearing-free switch reluctance motors are integrated. The three-freedom-degree magnetic levitation switch reluctance motor of the 12 / 4 pole structure comprises a radial magnetic field motor stator core (1), a radial magnetic field motor rotor core (2), an axial magnetic field motor rotor core (3), a radial magnetic field motor winding (4), an axial magnetic field stator core (5) and an axial magnetic field motor winding (6). The functions of a bearing-free motor and the functions of an axial magnetic levitation bearing are integrated, integration is high, radial suspension force, axial suspension force and torque are completely decoupled on the structure, the control method is simple, the suspension performance is good, the torque pulsation is small, the power density is high, and the high-speed adaptability is strong.

The invention discloses a truncated conical solid cylinder bearingless switched reluctance motor, which comprises a first stator and a rotor, a second stator and a rotor, a truncated conical solid cylinder; each tooth pole of the first and second stators There are first and second radial excitation windings on the top, these windings are independently controlled, and the axial excitation windings are connected in series on each tooth pole of the first and second stators; there is a conical outer chamfer on the axial inner side of the two stators Structure; the tooth poles of the first and second rotors have a 15° rotation mechanical angle difference; the first and second rotors share a rotating shaft with the truncated conical solid cylinder, and the outer chamfers of the truncated conical solid cylinder and the two stators There is an air gap length between them, when the first and second radial field windings conduct current, the first and second rotors provide radial levitation force, and at the same time the axial field windings conduct to control the magnetic flux in the stator teeth Density, so that the solid cylinder obtains a set of magnetic pulling force, and extracts the axial component of this set of magnetic pulling force to realize axial levitation control, and finally realizes five-degree-of-freedom levitation.

The invention relates to a method for weaving variable warp rib fabrics with an air-jet loom. The method comprises: a weft insertion system of the prior air-jet loom is additionally provided with a weft yarn detection device; during weaving, a plain weave cam opening mechanism and a four-color weft selection air-jet loom provided with an electric reeling and electric run-in warp device with changed weft density are used. The warp run-in and the reeling amount of the loom change according to a set rule. With the change of the warp run-in and the reeling amount, in each opening, different number of weft yarn is led in according to the set weft insertion order, so the loom realizes the weaving of the changed weft rib fabric. The method has the advantages that: the variable warp rib fabrics is made by a method of introducing a different number of weft yarn in each opening, so the running speed of the loom is improved, the filling insertion rate and the yield is improved, the production cost is reduced and economic benefits of a weaving company is improved.

The invention discloses a hybrid radial conical magnetic bearing switch reluctance machine and a control method. The machine comprises a switch reluctance machine, two radial magnetic bearings and two conical magnetic bearings, wherein one of the radial magnetic bearings and one of the conical magnetic bearings are arranged at one side of the switch reluctance machine, the other two bearings are arranged at the other side of the switch reluctance machine, bias windings of four magnetic bearings are connected in series with a winding of the switch reluctance machine to form an m-phase torque winding, torque control is the same as a traditional control mode of the switch reluctance machine, five directional suspension forces are only related to a current of the m-phase torque winding and a current of each directional suspension winding, the suspension forces are decoupled to one another, and the torque and the suspension forces can be in decoupling control. The machine and the control machine are high in integration, a few in control variable and simple in suspension control, and a suspension system power converter is low in cost.

The invention discloses a five-degree-of-freedom co-excited bearing-less switched reluctance motor system and a control method. The system is composed of a switch reluctance motor, a hybrid magnetic bearing and a radial magnetic bearing, wherein bias windings of the two bearings and an m-phase armature winding of the switch reluctance motor share the same set of power converter; with the adoptionof a co-excited manner, biased magnetic flux is generated in the two bearings when torque is generated in the switch reluctance motor; the m-phase armature winding adopts the traditional switch reluctance drive mode; and the current of the bias winding is only related to working conditions of the switch reluctance motor, and no control is performed. In addition, current of five suspending windingsis reasonably controlled by combining with the current of the bias winding collected in real time, so that five-degree-of-freedom suspension operation can be realized. According to the system disclosed by the invention, suspension force is decoupled, the suspension force and the torque are also decoupled, the control variable is less, the suspension control is simple, the integration level is high, the reliability is high, no permanent magnet exists in the system, the environmental suitability is high, and the system has unique advantages in high-speed or ultra-high-speed application occasions.

The invention relates to a three-degree-of-freedom magnetic suspension switched reluctance motor, which belongs to the field of magnetic suspension switched reluctance motors and magnetic suspension bearings. The motor stator is composed of a radial magnetic field motor stator and two magnetic bearing stators. Both the radial magnetic field motor stator and the two magnetic bearing stators have a salient pole structure. Each stator tooth of the radial magnetic field motor stator is wound with a motor winding. A magnetic bearing winding is wound on each stator tooth of the magnetic bearing stator; the rotor is composed of a salient pole rotor and two cylindrical rotors axially superimposed, the salient pole rotor is located between the two cylindrical rotors, and the salient pole rotor is used to generate torque , a cylindrical rotor is used to generate radial and axial suspension forces. The invention provides a three-degree-of-freedom magnetic suspension switched reluctance motor, which integrates a bearingless switched reluctance motor and an axial magnetic suspension bearing, and is highly integrated; there is only one set of windings on the stator teeth of the axial magnetic bearing, and the stator is convex. Pole structure, there are many optional structures; the levitation control is implemented by using the minimum inductance area, the levitation current has little influence on the torque current, and the phase-to-phase coupling effect is small.

The invention discloses a 12 / 4 pole single winding bearingless switch reluctance motor and a control method thereof. The motor comprises a stator with 12 gear poles and a rotor with 4 gear poles; each pole of the stator winds a set of excitation windings; the rotor winds no winding; the rotor gear is wider than the stator gear by 30 degrees to enable each inductance to have a maximum induction flat-top area with 1 / 3 period. When the motor is in motor-driven operation, if the two phases in an inductance rising area and an inductance flat-top area are communicated simultaneously, the phase in the inductance rising area can produce a torque, and the phase in the inductance flat-top area can produce a suspension force; when the motor is in motor-driven operation, if only the phase in the inductance flat-top area is communicated, four windings of the phase are individually controlled to produce the suspension force and to provide excitation for the electricity generation stage, and later to generate electricity in an inductance drop area with follow current. The method controls the suspension force and the torque regionally, realizes the decoupling of the suspension force and the torque, simplifies the control algorithm, improves the radial bearing capacity and the high-speed adaptability of the motor, has generality and popularization in structure, and enables the field of the bearingless switch reluctance motor to gain a new development.

The invention discloses a switch reluctance motor without bearings. The number of teeth of a suspension stator of the reluctance motor is four, the number of teeth of a torque stator is four times of a phase number m, the number of teeth of a rotor is integral times of four, four suspension stator teeth stretch out of a stator yoke of the rotor, then the phase number m teeth of the torque stator stretch out of each tooth of the suspension stator again, a torque winding winds on each tooth of the torque stator, a suspension winding winds on each tooth of the suspension stator, currents of the torque windings and the suspension windings are controlled respectively, and suspension force and torque are produced at the same time. According to the switch reluctance motor without the bearings, only one winding is arranged on the teeth of the torque stator and the teeth of the suspension stator respectively, relative to a traditional duplex winding switch reluctance motor without the bearings, the torque is not contacted with the suspension windings, a groove full rate is high, a utilization rate of the windings is high, the suspension force and torque force are completely decoupled structurally, a control method is simple, suspension performance of the motor is good, systematic cost is low, and high-speed adaptability is strong.

The invention discloses a four-degree-of-freedom composite structure bearingless switch reluctance machine and a controlling method thereof. The motor is composed of a switch reluctance machine and two radial magnetic bearings. Each magnetic bearing stator is formed by four E-type structures; one suspension winding and one armature winding wind around a middle tooth of each E-type structure; and one bias winding and one armature winding wind around two tooth windings. One armature winding winds around each tooth of the switch reluctance machine and crosses over the two magnetic bearing stators and a switch reluctance machine stator. An A-phase armature winding forms one phase; and B-phase and C-phase armature windings and bias windings are connected in series to form another two phases. A torque controlling way is identical with a traditional switch reluctance machine controlling way. The suspension force at a certain direction of each magnetic bearing is only related with a three-phase armature winding current and a suspension current at the direction; and the torque and the suspension force as well as the torque and the radial suspension force is in decoupling controlling. The suspension controlling becomes simple; and the outputs of the suspension forces are balanced and symmetric.

The invention discloses an axial parallel mixed structure bearingless switched reluctance motor and its control method. The motor stator is composed of a reluctance motor stator and a magnetic bearing stator, the rotor is composed of a salient pole rotor and a cylindrical rotor, and the winding is composed of a rotating The torque winding is composed of the reluctance motor winding and the wide-tooth winding, and the number is the same as the number of phases m; the suspension winding is composed of two radial direction suspension windings; the magnetic bearing stator is composed of 4 E-shaped structures Composition, the middle tooth width is twice the rest; the motor calculates the levitation current according to the direction of the levitation force; independently controls the torque winding current and the opening and closing angle of the power circuit, and controls the speed and torque in real time; independently controls the current of the two levitation windings , adjust the suspension force in real time, decoupling between rotation and suspension. The motor and the control method of the invention have less control variables, simple suspension control, and low cost of the power converter of the suspension system.

The present invention discloses a taper magnetic bearing switched reluctance motor and a control method thereof. The motor is composed of a switched reluctance motor and two taper magnetic bearings; the bias windings of the two taper magnetic bearings are connected in series with the winding of the switched reluctance motor to a form m-phase torque winding; two vertical suspension windings of each taper magnetic bearing are configured to control the suspension with two degrees of freedom, have four vertical degrees of freedom and are able to perform decoupling control; the axial suspension windings of the two taper magnetic bearings are connected in series to form an axial suspension winding for controlling the axial suspension; the motor is able to independently control the opening and closing angles of a torque winding current and power circuit to control the rotating speed and the torque in real time; and the motor is able to control five suspension winding currents to regulate the suspension forces in five directions so as to realize the suspension with five degrees of freedom. The taper magnetic bearing switched reluctance motor and the control method thereof are small in control variables, simple in suspension control and low in cost of a suspension system power converter.

The present invention proposes a permanent magnet bias hybrid magnetic bearing switched reluctance motor, in which the torque stator and the levitation force stator of the motor are axially superimposed, and the torque rotor and the levitation force rotor are axially superimposed; the torque stator, the levitation force The force stator is a salient pole structure with 12 teeth; the torque rotor is a salient pole structure with 8 teeth, and the suspension force rotor is a cylindrical structure; each winding is wound on a torque stator and a suspension force stator. There are 12 stator teeth in total; 1 ring-magnetized permanent magnet is placed on each of the 12 stator yokes, or 1 radial-magnetized permanent magnet is placed on each of the 12 levitation force stator teeth. The motor of the present invention realizes the decoupling of torque and levitation force in structure, and is convenient to control; the permanent magnet provides bias magnetic flux, and the radial bearing capacity is large; the influence of motion electromotive force on current chopping control is eliminated, and the current control effect is good , High-speed adaptability.

The invention discloses an electromagnetic bearing switch magnetic resistance motor system and a control method. The motor system comprises a switch magnetic resistance motor, a three-DOF magnetic bearing and a radial magnetic bearing. Bias windings of the two magnetic bearings are connected in series and are then connected with DC buses of asymmetric half-bridge power converters of m phase armature windings of a switch magnetic resistance motor through four diodes, the m phase armature windings employ a traditional switch magnetic resistance driving mode, under the rectification effect of thefour diodes, a continuous invariant current is generated in a bias winding to provide bias magnetic flux for the two magnetic bearings; through reasonable control on currents of the five suspension windings, five-DOF suspension operation can be realized, mutual decoupling among five suspension forces is carried out, and decoupling between the suspension forces and torques is carried out. The motor system is advantaged in that the integration degree is high, the dynamo-electric energy conversion utilization rate is high, control variables are in a small quantity, suspension control is simple,reliability is high, the motor system has no permanent magnet, so working environment adaptability is strong, and the motor system is especially suitable for high-speed or super-speed application occasions.

The invention discloses a duplex-winding bearing-free switched reluctance motor of a composite structure. The motor comprises a motor stator, a motor rotor and motor windings. The motor stator is composed of a reluctance motor stator, a magnetic separation disc stator and a magnetic bearing stator. The motor rotor is composed of a reluctance motor rotor, a magnetic separation disc rotor and a magnetic bearing rotor. The magnetic bearing stator is of a [-shaped structure, and the magnetic bearing rotor is of a cylindrical structure. The reluctance motor stator and the reluctance motor rotor are both of a salient pole structure. The motor windings comprise the torque winding and the suspension force winding. The torque winding is wound on one tooth of a [-shaped iron core of the reluctance motor stator, one tooth of a [-shaped iron core of the magnetic separation disc stator and one tooth of a [-shaped iron core of the magnetic bearing stator. The suspension force winding is wound on the other tooth of the [-shaped iron core of the magnetic bearing stator. According to the duplex-winding bearing-free switched reluctance motor of the composite structure, the reluctance motor rotor generates torque, suspension force rotors generate suspension force, and decoupling of the torque and the suspension force is achieved structurally; motional electromotive force is zero in a suspension breakover interval, influences of the motional electromotive force on current chopped waves are eliminated, and the current real-time control effect is improved.