42results about How to "Achieve brushless" patented technology

The invention relates to an electric excitation part double stator brushless mixed excitation synchronous generator. The generator is composed of a permanent magnet synchronous motor (17) and an electric excitation part (18), magnetic circuits of the two parts are mutually independently, and an armature winding (5) is arranged in a stator core (9) of the permanent magnet part and an outer stator core (12) of the electric excitation part. The electric excitation part is provided with the outer stator core (12) and an inner stator core (11), and a three phase or multiphase exciting winding (10)is placed in the inner stator core (11). Magnitude and phase of current in the exciting winding (10) are changed by virtue of a frequency converter, so as to regulate magnitude and phase of electric excitation electromotive force in the armature winding (5), thus achieving the aim of adjusting total electromotive force and output voltage. The electric excitation part has no air gap, and magnetomotive force required by electric excitation is small, thus field adjustment efficiency is high. The electric excitation magnetomotive force can not cause irreversible demagnetization on permanent magnet, and brushless alternating current excitation is adopted, thus reliability of motor is high.

The invention discloses a double-stator mixed excitation motor with a Halbach permanent magnet array. An intermediate rotor is coaxially installed between an outer stator and an inner stator, the inner stator is composed of 1 inner stator yoke, 12 inner stator teeth, 12 circular arc-shaped Halbach permanent magnet array modules, 12 inner stator slots and 12 non-magnetic-conduction circular arc-shaped brackets, a bracket is connected between two adjacent inner stator teeth, electric excitation magnetic poles, magnetic channels and mixed magnetic field magnetic poles are respectively arranged onthe inner stator teeth from the inside to the outside, the inner stator tooth portions having a gap between the two brackets form the magnetic channels, concentrated excitation windings are sleeved on the electric excitation magnetic poles, a Halbach permanent magnet array module is fixedly arranged on an outer wall of each bracket, and the Halbach permanent magnet array module is embedded between two mixed magnetic field magnetic poles; and by adoption of the Halbach array structure arrangement, the single-sided magnetic field shielding property and the single-sided magnetization property thereof are fully utilized, the magnetic flux leakage of a permanent magnet at the inner stator is effectively reduced, the utilization rate of the permanent magnet is improved, and the torque output capability is enhanced.

The invention discloses a squirrel-cage conductor rotor brushless power feedback type permanent magnet governor, which comprises an input shaft connected to a prime mover and an output shaft connected to a load arranged on the same central shaft, and a permanent magnet rotor is pierced on the input shaft , the output shaft is pierced with a squirrel-cage conductor rotor that can rotate concentrically; the outer side of the conductor rotor is surrounded by a three-phase winding stator fixed to the casing; the input shaft is connected to the casing through the first bearing, and the output shaft passes through The second bearing is connected with the casing, and the input shaft is connected and supported with the output shaft through the third bearing. This structure can realize the brushless transmission of the conductor rotor slip power to the stator side, realize the efficient operation of the speed control system within a wide speed control range, and improve the energy saving efficiency of the speed control system.

The invention discloses a double-mechanical port electromechanical energy converter, belongs to the technical field of motors, and aims to solve the problem of the conventional double-mechanical port electromechanical energy converter that a motor has low reliability and large size due to the existence of an electric brush and a sliding ring. A stator, an outer rotor and an inner rotor of the double-mechanical port electromechanical energy converter are coaxially arranged from outside to inside in sequence; an outer air gap is formed between the stator and the outer rotor; an inner air gap is formed between the outer rotor and the inner rotor; the inner rotor is connected with an inner rotary shaft; the outer rotor is connected with an outer rotary shaft; one end of the stator is connected with the inner rotary shaft through a bearing, and the other end of the stator is connected with the outer rotary shaft through a bearing; the stator comprises a stator iron core and a multi-phase stator symmetric winding; an outgoing line of the multi-phase stator symmetric winding is connected with the output end of an inverter; the inner rotor is of a surface permanent magnet rotor structure, an embedded permanent magnet rotor structure or a Halbach permanent magnet array type rotor structure; the outer rotor comprises an outer rotor iron core and an outer rotor winding; and the outer rotor winding is an m-phase short-circuit winding. The double-mechanical port electromechanical energy converter serves as an electromechanical energy converter.

The invention provides a direct-driven permanent magnet synchronization disc multi-combination large-power vertical type wind generating set which comprises a set base, a first shell, a second shell, a third shell, a fourth shell, a fifth shell, a set end cover, a set of power fan blades, a main control station arranged in the shells, a first set platform, a staircase, a second set platform, a third set platform, a hydraulic station platform, a hydraulic station and a main power shaft. Three pairs or multiple pairs of first sets, second sets and third sets are arranged on the two sides of the main power shaft, wherein the first sets, the second sets and the third sets are mutually matched. The sets are connected with the power fan blades through a first universal joint, a second universal joint and a third universal joint, and the five shells from the first one to the last one are fixedly connected through set screws. The direct-driven permanent magnet synchronization disc multi-combination large-power vertical type wind generating set is high in efficiency, the effect that a generator is brushless is achieved, the power factor of a power grid is improved, a gear box is removed, the efficiency and reliability of the wind generating set are improved, maintenance quantities of equipment are reduced, and noise pollution is reduced.

The invention discloses a parallel rotor structured hybrid-excited motor brushless electro-excitation rotor pole with an electro-excitation winding positioned on a rotor; the electro-excitation rotor pole is of nonsalient pole structure and is composed of a linear core pole and an end core pole positioned between a permanent magnet rotor and the linear core pole; the electro-excitation rotor pole is arranged coaxial to an exciter rotating armature and a permanent magnet rotor pole; a rotating rectifying power supply system of the electro-excitation winding combines a six-phase dual-Y-shift 30-DEG rotating armature winding and two three-phase rotating rectifying bridges, and direct current outputs of the two three-phase rotating rectifying bridges are connected in parallel; the brushless electro-excitation rotor pole makes full use of space between permanent magnets and an electro-excitation rotor in an existing parallel rotor structure, gap magnetic field adjusting capacity can be effectively enhanced, high-quality brushless power supply can be provided for the electro-excitation rotor, and the brushless electro-excitation rotor pole also has the function of fault redundant operation.

The invention discloses a hybrid vehicle brushless double-stator electric machine which includes an electric machine casing (5). A first stator (1), a magnetic adjusting ring (3) and a second stator (4) are arranged in order from left to right inside the electric machine casing (5). An internal rotor (2) is disposed inside the first stator (1). The internal rotor (2) is connected to an output shat (6) of an internal combustion engine. The output shaft (6) of the internal combustion engine is supported in a left side bearing hole of the electric machine casing (5). The magnetic adjusting ring (3) is connected to a primary decelerator input shaft (3-3) which is supported in a right side bearing hole of the electric machine casing (5). The shaft axes of the first stator (1), the internal rotor (2), and the magnetic adjusting ring (3) are overlapped with the shaft axis of the second stator (4). The electric machine herein has no brush or slip ring structures, can reduce structural complexity of electric machines, has increased reliability, reduces maintenance cost, can help winding heat dissipation and increase dynamic balance of rotors and increases working efficiency.

The invention relates to a parallel structural hybrid excitation synchronous generator without an electrical excitation rotor, comprising a permanent magnet motor (17) and an electrical excitation part (18) which are coaxially arranged in a case (13) in parallel, wherein the two parts of magnetic circuits are independent; an armature winding (5) is respectively arranged in stator cores of the twoparts, and another three-phase or multiphase excitation winding (10) is arranged in the electrical excitation stator core (12); a magnetic conductive ring (11) is arranged at the inner circle of the electrical excitation stator core (12) to provide a pathway for an electrical excitation magnetic field and an armature magnetic field; and the size and the phase of current in the excitation winding (10) are changed through a frequency converter to adjust the size and the phase of the electrical excitation electromotive force in the armature winding (5), thereby reaching the purpose of changing the output voltage size. Because the electrical excitation part has no air gap, the required magnetic motive force of the electrical excitation is little and the adjusting efficiency of the magnetic field is high. Irreversible demagnetization to a permanent magnet cannot be caused by the electrical excitation magnetic motive force; and the reliability of the motor is high by utilizing brushless alternating current excitation.

The invention discloses an axial and radial magnetic flux combined brushless power feedback type permanent magnet speed regulation device. The device comprises an axial and radial magnetic flux combined permanent magnet speed regulator and a slip power feedback control unit; the permanent magnet speed regulator comprises a permanent magnet rotor, a conductor rotor and a three-phase winding statorwhich are concentrically installed; the permanent magnet rotor is fixed to an input shaft and connected with a prime motor; the conductor rotor is fixed to an output shaft and connected with a load; the three-phase winding stator is fixed to a machine shell and connected with the output shaft through a bearing; an axial air gap and a radial air gap exist between the permanent magnet rotor and theconductor rotor; an axial air gap exists between the three-phase winding stator and the conductor rotor; and a stator side winding is connected with the slip power feedback control unit. The space utilization rate of the speed regulator is improved; the torque density of the speed regulator is correspondingly improved; the brushless transmission of the slip power of the conductor rotor to the three-phase winding stator is realized; and stator side power is fed back to a power grid; and the efficient operation of the speed regulator under any operation condition is realized.

The invention discloses a brushless double electromechanical port permanent magnet motor with high torque density, which comprises an annular stator core (1), a modulation rotor and a permanent magnet rotor, and is characterized in that the inner surface of the stator core (1) is provided with closed slots, the slots are internally provided with two sets of windings with the numbers of pole-pairs being unequal, one set of the windings are modulation windings (2), and the other set of the windings are permanent magnet windings (3); the modulation rotor comprises modulation rotor yokes (4), and the modulation rotor yokes (4) form a magnetic field modulation motor structure together with the modulation windings (2) and the permanent magnet rotor; the adjacent modulation rotor yokes (4) are provided with a modulation rotor permanent magnet (5) therebetween, each modulation rotor permanent magnet (5) is of a tangential excitation structure, and the modulation rotor permanent magnets (5) form a permanent magnet motor structure together with the permanent magnet windings (3). The invention further discloses a hybrid power automobile comprising the motor. The motor disclosed by the invention can realize independent control for the rotating speed and the torque of two mechanical ports, realizes blushless windings, is compact in structure and has large output torque.

The invention provides a low-cost driving system with three independent power supplies and for an electromobile. The system comprises the three independent power supplies, three switch tubes, a three-phase double-salient driving motor, a control system and the like. The system is characterized in that the three-phase double-salient driving motor is powered up by the three independent power supplies, a bridge arm is formed by connecting each independent power supply and a corresponding switch tube in series, three bridge arms are sequentially connected in an end-to-end mode in series in a triangle shape, and three connection points of the bridge arms are connected with a three-phase star-like winding of the double-salient driving motor respectively. The pole-arc coefficient of a stator core of the three-phase double-salient driving motor is 0.5, and the pole-arc coefficient of a rotor core of the three-phase double-salient driving motor is 0.333. The system is few in switching elements, low in cost, free of three-phase inverter direction connection and high in reliability and has high practicability.

The invention relates to a brushless parallel-structure hybrid excitation synchronous generator without an additional air gap. The generator is composed of two parts, namely a permanent magnet motor (18) and an electrical excitation motor (19), wherein the permanent magnet motor (18) and the electrical excitation motor (19) are coaxially arranged in a shell (14) in parallel, the magnetic circuitsof the two parts are mutually independent, and an armature winding (5) is arranged in the stator core of the two parts. A triphase or multiphase exciting winding (10) is also arranged in an electrical excitation stator core (13), and an electrical excitation rotor (11) is a smooth cylinder formed by laminating round silicon steel sheets. The purpose of changing total electromotive force and output voltage is realized by changing current and phase in the exciting winding (10) by a frequency converter to regulate the magnitude and phase of the electrical excitation induction electromotive forcein the armature winding (5). Because the electrical excitation part is not provided with an additional air gap, magnetomotive force required by electrical excitation is small, and the regulation efficiency of the magnetic field is high. The electrical excitation magnetomotive force does not cause irreversible demagnetization to a permanent magnet, and brushless AC excitation is adopted to improvethe reliability of the motor.