59 results about "Doubly salient" patented technology

The invention discloses an electro-magnetic doubly salient motor torque ripple suppression method based on harmonic double closed-loop control, and the method comprises the steps: constructing the harmonic double closed-loop control of a torque ripple outer ring and a current harmonic inner ring in an electro-magnetic doubly salient motor current source type drive system of a multiplexing excitation winding; a torque pulsation outer ring observes electromagnetic torque through a model reference adaptive method, pulsation components of the torque pulsation outer ring are extracted in combination with an adaptive notch filter, and a current harmonic inner ring given value is output through closed-loop regulation; the current harmonic inner ring extracts harmonic current by constructing a harmonic space decoupling transformation matrix and combining with a rotating coordinate system of corresponding subharmonics, current harmonics counteracting torque pulsation of the electro-magnetic doubly salient motor are generated through closed-loop adjustment, and the output characteristic of the motor is improved. According to the method provided by the invention, the torque ripple amplitude can be suppressed in a closed-loop manner, the given value of the harmonic current can be automatically adjusted, specific current harmonic injection is realized, the output torque ripple of the electro-magnetic doubly salient motor is eliminated, and the problems that a traditional harmonic injection method is not matched under different operation conditions of the motor and depends on motor parameters are solved.

The invention discloses a fault diagnosis method for an H-bridge half-controlled rectifier of an electro-magnetic doubly salient generator, and relates to the field of electro-magnetic doubly salient generators, the method is developed based on an improved H-bridge half-controlled rectifier topological structure, and the improved H-bridge half-controlled rectifier topological structure is additionally provided with a current sensor for each phase of armature winding. The leads of the left and right bridge arms connected with each phase of armature winding are wound on the current sensor in a winding manner, so that each phase of current sensor can obtain more current information; open-circuit fault diagnosis can be realized through current measured by a current sensor wound by a working two-phase armature winding in each sector, the method is small in calculation amount and easy to realize, is not influenced by rotating speed or load change, is also not influenced by fault occurrence positions and conduction angle change, can realize single-tube, double-tube and multi-tube fault positioning, and can be applied to the field of fault diagnosis. The diagnosis effect is good; and the application range is wide.

An electric machine assembly including: a rotor; and a stator disposed concentrically about the rotor and separated from the rotor by a gap; where the rotor includes five rotor protrusions disposed concentrically about the rotor; where the stator includes two permanent magnets or direct current coils disposed concentrically about the stator and magnetized is opposing directions, where each of the permanent magnets or direct current coils provides an associated baseline magnetic flux that is adapted to interact with the rotor protrusions; and where the stator includes six stator poles disposed concentrically about the stator, where each of the stator poles is adapted to receive a current to provide an associated induced magnetic flux that is adapted to interact with the rotor protrusions. The stator is divided into two stator segments, where each stator segment includes three stator poles of the six stator poles, and where the two stator segments are separated by the two permanent magnets or direct current coils.

The invention discloses an electro-magnetic doubly salient motor instantaneous stator iron loss calculation method, which comprises the following steps of: replacing a flux linkage generated by exciting current with a flux linkage generated by each phase current according to an equivalent current principle, obtaining data of a phase equivalent flux linkage, a rotor angle and a phase equivalent current by utilizing finite element simulation, and combining magnetic circuit analysis to calculate the instantaneous stator iron loss of an electro-magnetic doubly salient motor. A flux density solving module of each region of the stator yoke is built by using a phase flux linkage look-up table model, and the data dimension is reduced. The method comprises the following steps: dividing stator pole regions according to the magnitude of the flux density of a stator pole, directly solving the data of the flux density, the rotor angle and the phase current of each region by finite element simulation, and constructing an instantaneous iron loss calculation model of the doubly salient electro-magnetic motor stator in combination with a time domain iron loss calculation formula. According to the modeling method, the used data amount is small, the time consumed in the modeling process is short, model calculation is accurate, the modeling method can operate along with a motor control model, the required operation time is greatly shortened compared with finite element joint simulation, and research on motor stator iron loss and control strategy optimization can be rapidly carried out.

The invention discloses an axial hybrid excitation doubly salient linear motor which comprises a primary, a secondary, an air gap between the primary and the secondary, permanent magnets, a primary pole and a secondary pole which adopt salient pole structures, an excitation winding and a three-phase armature winding are wound on primary teeth, the tooth pitch of the secondary teeth is larger than that of the primary teeth, the permanent magnets and the secondary pole are equal in length, and the length of the secondary pole can be larger than that of the primary. Magnetic fields generated by the permanent magnets and the electro-magnetic field form a main magnetic field of the motor. Exciting winding coils are wound on the primary teeth, and magnetic flux paths of all phases are the same. When the axial hybrid excitation doubly salient linear motor works, output torque pulsation can be reduced, the motor is novel in structure, reliable in performance and easy to control, and the axial hybrid excitation doubly salient linear motor is suitable for medium and small power generation or electric occasions such as the packaging industry, the numerical control machine tool field and a cordless elevator as a traditional radial linear motor. Therefore, the axial hybrid excitation doubly salient linear motor has a great application market.

The application discloses an efficiency optimization method of an electrically excited doubly salient wind power generator, and belongs to the technical field of motor control, and the technical scheme is as follows: step S1: a field-circuit combined simulation software Maxwell-Simplorer is used to establish a coupling model of a magnetic field and an electric field of an electrically excited doubly salient wind power generator system; step S2: loss distribution characteristics under different rotating speeds, load working conditions and conduction angles are obtained; step S3: a particle swarm optimization algorithm PSO is used to optimize a neural network BP, and loss data of the electrically excited doubly salient wind power generator system is trained; and step S4: the optimal conduction angle obtained in step S3 is applied to control of the electrically excited doubly salient wind power generator system. The application can obtain the optimal conduction angle in a wide rotating speed load range, realizes loss optimization of the motor, and improves the system efficiency.

This invention discloses a fault-tolerant control method for a modular bearingless electrically excited doubly salient pole motor under fault conditions, relating to the field of fault-tolerant control for bearingless electrically excited doubly salient pole motors. This scheme uses a three-phase full-bridge converter to control the switching transistors, enabling the three-phase full-bridge converter to operate alternately as a single-phase bridge inverter circuit under normal and fault conditions of the switching transistors, achieving fault tolerance of the switching transistors in the toroidal DC winding control circuit. Under the condition of open circuit and loss of excitation in the toroidal DC winding, fault-tolerant control of rotor levitation of the modular bearingless electrically excited doubly salient pole motor is achieved through the reuse of the armature winding. The method includes a three-phase full-bridge converter control strategy for fault-tolerant control of the modular bearingless electrically excited doubly salient pole motor and an armature winding reuse control strategy for fault-tolerant control of the modular bearingless electrically excited doubly salient pole motor. This further improves the fault tolerance capability of the modular bearingless electrically excited doubly salient pole motor.

Supercapacitor direct-connected energy feedback control method based on the external characteristics of the motor, the steps include: 1) Analyze the structural parameters of the electro-excited doubly salient motor, establish a field-circuit coupling model and the peripheral drive circuit; 2) Divide the data segments, obtain the external characteristic data of the output voltage and current of the motor under different excitation currents, speeds and loads through multi-condition simulations, and preprocess the data; 3) Initialize the multi-layer perceptron model, take the motor speed, the target feedback current and the supercapacitor voltage as the model inputs, and take the reference value of the excitation current as the output. 4) Deploy the optimal model to the DSP embedded system to construct an energy feedback control system with supercapacitor direct connection based on the external characteristics of the electro-excited doubly salient motor. The control method proposed by the present invention has faster control speed and accuracy compared with the traditional PID controller, effectively improving the energy feedback efficiency.

The invention relates to the field of motors, and discloses a magnetic suspension doubly salient permanent magnet motor, which comprises a rotating assembly, and is characterized in that the rotating assembly comprises a rotor shaft and a stator part arranged at the outer side of the rotor shaft; the radial suspension assembly is arranged on the outer side of the rotor shaft; the axial suspension assembly is arranged on the outer side of the rotor shaft; the permanent magnet is located between the radial suspension assembly and the axial suspension assembly; the equipment combines the characteristics of a magnetic bearing and a doubly salient motor, due to the magnetic isolation effect of the permanent magnets, the armature magnetic field of the motor and the magnetic suspension bearing control magnetic field do not influence each other, independent control of torque and suspension force can be realized without adding a decoupling algorithm, the advantages of no mechanical wear, long service life and the like of the magnetic suspension bearing are exerted, and the magnetic suspension bearing is more stable in performance. And the purposes of low energy consumption and high efficiency of the doubly salient motor are achieved.

The invention discloses a position-sensorless control method and system for an electro-magnetic doubly salient generator, and belongs to the technical field of motor control. The method comprises excitation control and armature control, the excitation control maintains the DC bus voltage stable through a voltage and current regulator closed loop, and the armature control only detects A and B phase voltages; according to the method, an electric cycle is divided into three sectors, the sectors correspond to different conduction switch tubes, the sectors are judged by calculating the two-phase voltage difference value in real time and according to threshold logic, the corresponding switch tubes are triggered to be combined and conducted according to the judgment result of the sectors, and a current loop is managed by combining the diode clamping effect. Meanwhile, DC bus voltage is continuously monitored for excitation dynamic adjustment, and a sector state flag bit is utilized to ensure synchronization of rotor position tracking and switch action; according to the method, the position of the rotor sector is mapped through the two-phase voltage difference value, a position sensor and a current sampling circuit are omitted, the complexity and cost of the system are reduced, and the control precision and the anti-interference capability are both considered.

The invention discloses a four-quadrant operation method under excitation loss fault tolerance of an electro-magnetic doubly salient motor, and belongs to the field of motor control. According to the operation method, a quadrant operation interval is determined through logical judgment of output polarity and rotation speed polarity of a rotation speed ring regulator. The torque pulsation problem existing during torque output is considered, a two-period twelve-state control strategy adopted during positive torque output is designed, and a designed two-period six-state control strategy is adopted during negative torque output. And switching back and forth between the two designed control strategies through designed quadrant judgment to realize torque commutation output. According to the method, smooth switching of the electrically excited doubly salient motor in the four-quadrant state can be achieved, torque ripple suppression can be achieved in the stable state, and the two designed strategies and methods are simple and convenient and high in portability.

This invention discloses an improved integrated winding structure for a bearingless electrically excited doubly salient pole motor, relating to the field of bearingless motor technology. It integrates the levitation winding and excitation winding of a traditional bearingless electrically excited doubly salient pole motor into an integrated levitation winding. A control method is provided to enable the integrated winding configuration of the bearingless electrically excited doubly salient pole motor for power generation and stable levitation. This control method includes a displacement control module, a levitation current calculation module, and a levitation current control module. Stable rotor levitation can be achieved by controlling the levitation winding current. This scheme optimizes the winding arrangement and achieves mutual scheduling of power generation and levitation capabilities through equivalent control. Compared to traditional bearingless doubly salient pole motors, the integrated winding configuration bearingless electrically excited doubly salient pole motor designed in this invention improves the utilization rate of slot space, expands the working range of the bearingless doubly salient pole motor, and its overall operating state is more flexible.

An embodiment of the present invention discloses a highly reliable modular hybrid excitation doubly salient motor for high-speed turbine power generation, which relates to the technical field of doubly salient motors. The motor stator core includes a first module stator core, a second module stator core, permanent magnets, and a magnetic isolation sleeve. The single-phase stator core is composed of two module stator cores, namely the first module stator core and the second module stator core. The three-phase module stator cores are fixed by being embedded in a magnetic isolation sleeve made of magnetic isolation material. An excitation coil and an armature coil are wound on the middle large tooth of the first module stator core, and only an armature coil is wound on the middle large tooth of the second module stator core, without an excitation coil. Both the motor stator core and the motor rotor core are of salient pole structures. The motor realizes the isolation of the magnetic flux paths between phases, ensuring that when a fault occurs in a certain phase winding, the influence of the faulty phase on other phases is relatively small.

The embodiment of the invention discloses a novel parallel hybrid excitation bearingless doubly salient motor, and relates to the technical field of bearingless motors. The side-by-side hybrid excitation bearingless doubly salient motor is composed of two parts of bearingless doubly salient motors which are coaxially arranged in parallel, one part is excited by a stator permanent magnet, the other part is excited by an excitation winding, and magnetic flux paths of the two parts are mutually independent and share one set of armature winding. Due to the fact that the two excitation modes of permanent magnet and electric excitation are adopted at the same time, the power density of the motor is remarkably improved, and the adjustment range needed by suspension current in the excitation current adjustment process is greatly reduced. In addition, when short circuit and other winding faults occur and field suppression is needed, the exciting current is reversed, the suspension force can still be stably generated by adjusting the two parts of current on the suspension winding, and the reliability of suspension operation of the system is improved.

This invention presents a method for improving the torque performance of an electrically excited doubly salient pole motor based on current-coordinated control. By analyzing the influence mechanism of excitation current and armature current on the magnetomotive force, the concept of equivalent current is proposed, and the excitation current and armature current are equivalently converted. Based on this, a current-torque model is established to derive the current distribution ratio that maximizes the output torque, optimizing the allocation of excitation current and armature current. Furthermore, this invention employs an asymmetric current control method, which effectively utilizes reluctance torque for compensation, further improving the average torque and significantly reducing torque ripple. This invention can calculate the optimal current distribution ratio in real time under low-speed and dynamic operating conditions, achieving dynamic adjustment of excitation current and armature current, and significantly improving the torque output capability of the electrically excited doubly salient pole motor. This invention is suitable for applications with stringent requirements for torque output performance, such as aircraft starting systems.

The utility model discloses a highly integrated single-phase doubly salient permanent magnet motor, and belongs to the technical field of doubly salient motors. A radial stator mainly comprises an outer shell and an inner shell, a first partition plate and a second partition plate are fixedly connected to gaps between the outer shell and the inner shell respectively, notches are formed in the ends of the first partition plate and the second partition plate, a water channel is formed between the first partition plate and the second partition plate, and heat conduction fins are integrally formed on the side wall of the water channel and the side wall of the inner shell respectively. The radial stator is designed into the outer shell and the inner shell, the heat dissipation cavity is formed in the outer shell, the staggered notches are formed between the outer shell and the inner shell, the cooling water tank capable of allowing cooling liquid to flow is formed, and the multiple heat dissipation fins are arranged on the side wall of the inner shell in the water channel, so that the contact area with the cooling liquid is increased, and the cooling effect is improved. Therefore, heat caused by long-time work of the motor in the inner shell can be taken away as much as possible, and the phenomenon that the motor is overheated and demagnetized after long-time use is prevented.

The invention discloses an electro-magnetic doubly salient generator voltage regulation strategy based on cooperative control of excitation current and armature current. According to the invention, the doubly salient electro-magnetic motor can always work at the minimum copper loss point during power generation operation, and the copper loss of a power generation system is reduced. And meanwhile, the armature current inner ring is used for replacing the exciting current inner ring, so that the dynamic performance of the power generation system is optimized. The method comprises the following steps of: off-line acquiring a combination of exciting current and armature current under different rotating speeds and loads under the same output voltage, calculating the copper loss based on the acquired combination of exciting current and armature current, and establishing a copper loss optimal exciting current analytic expression through data fitting. And taking the voltage outer loop output as a q-axis current reference value, and obtaining a reference value of the excitation current under the current working condition through a copper loss optimal excitation current analytic formula in combination with the rotating speed and the output power of the motor at the moment. And a three-phase current reference value is obtained by combining real-time rotor position information and a q-axis current reference value, and closed-loop control of armature current is realized through a controllable rectifier. And closed-loop control of the excitation current is realized through an asymmetric half-bridge circuit by combining the excitation current reference value and the actual excitation current.

The application relates to the technical field of axial flux double-field motor, and particularly discloses a modular double-ladder topology axial flux double-field motor which adopts an axial structure of double rotors plus a single stator, forms symmetrical air gaps, and is provided with a first rotor, a second rotor, permanent magnets which are respectively composed of a plurality of modular stator cores and are combined in a circumferential direction, and stator permanent magnets and rotor permanent magnets which are designed to be rectangular plus ladder structures along the circumferential direction after being chamfered, are loaded in accommodating grooves one and accommodating grooves two respectively formed in the stator cores and the rotor cores, form a double-ladder alternating pole topology structure of alternating permanent magnets and ferromagnetic materials, effectively overcome the constraint relationship between the ferromagnetic teeth and the permanent magnets, can realize optimal magnetic flux modulation effect when torque is generated, improve the utilization rate of the permanent magnets, and can strengthen multiple working subharmonics while enhancing the fundamental wave, realize multi-harmonic co-excitation, and further improve the motor torque density.

The invention discloses a fault-tolerant control method for an open-winding doubly salient reluctance motor, mainly relates to the field of doubly salient reluctance motor control, and can realize fault-tolerant control when an inverter power switch tube has an open-circuit fault. The control system mainly comprises a doubly salient reluctance motor, a converter, a direct current power supply and a sensor. Wherein the converter topology adopts a double-inverter topology and is formed by two groups of three-phase inverters. In a vector control mode with direct-current bias, the current stresses of upper and lower bridge arms are different, open-circuit faults are easy to occur, the output efficiency is greatly reduced, and even electrodes are damaged. In order to deal with the situation, the fault-tolerant control method provided by the invention can switch the control mode of the motor on line when the open-circuit fault of the power switch tube occurs, so that the stable operation of the motor is kept. According to the invention, the operation stability of the doubly salient reluctance motor in occasions with high safety requirements, such as automobiles, is improved.

This invention discloses a method for open-circuit fault diagnosis and fault tolerance in a four-arm converter with an electrically excited doubly salient pole motor. The method includes: establishing three locations—the DC bus input buses of the first three arms, the upper arm bus of the fourth arm, and the lower arm bus—to install current sensors; dividing the electrical angle period into six operating intervals based on the motor inductance curve to obtain the relationship between the drive signal and the phase current; introducing the power transistor drive signal as a fault characteristic, and locating open-circuit faults in all arms of the power transistors by detecting the amplitude, polarity, and zero-crossing state of the three current sensors; after fault diagnosis, employing a commutation angle optimization strategy for faults in the first three arms, a lower arm constant-on strategy for upper arm faults in the fourth arm, and a fault-tolerant strategy based on excitation polarity reconstruction and potential coordination for lower arm faults. This method requires only three current sensors to achieve full-coverage fault diagnosis and fault-tolerant operation, reducing hardware costs and improving system reliability.

This invention discloses a method for diagnosing open-circuit faults in an electrically excited doubly salient pole motor inverter and its phase windings, relating to the field of motor fault diagnosis. The method includes: calculating the midpoint voltage of the phase bridge arm in the faulty sector to determine whether the fault is an open circuit in the upper transistor, lower transistor, or phase winding; based on different open-circuit fault types, turning on the upper power transistor, lower power transistor, or upper power transistor in the corresponding conducting state of the preceding and following sectors; calculating the midpoint voltage of the phase bridge arm in the faulty sector under different conducting states; combining the changes in the line excitation back EMF of the faulty sector; and determining whether the fault is an open-circuit fault type I or open-circuit fault type II in the upper / lower / combined transistor in the corresponding conducting state of the faulty sector, or an open circuit in the phase winding where the current in the faulty sector flows in the forward or reverse direction. This invention is based on the changing trend of the line excitation back EMF in different sectors, is unaffected by changes in inductance and speed, and achieves multiple fault location methods.

The present invention discloses a three-phase hybrid excitation doubly salient motor and its control method. The minimum unit of the motor includes 9 armature teeth and 3 excitation teeth, and 1 excitation tooth is distributed every 3 armature teeth. The excitation elements are arranged on the dedicated excitation teeth, and the armature windings are arranged on the independent armature teeth; all armature coils are wound on the armature teeth in the same winding direction, and the in-phase armature coils are connected in series to form a phase armature winding; the excitation coils are wound on the excitation teeth, the adjacent excitation coils are wound in the same direction, and all the excitation coils are connected in series to form a single-phase excitation winding. The permanent magnets are surface-mounted on the surface of the excitation teeth facing the rotor, each permanent magnet is radially magnetized, and the magnetization directions are the same. In the three-phase hybrid excitation doubly salient motor of the present invention, the excitation teeth and the armature teeth are completely separated, with higher reliability, and the problem of tight slot fill factor of the armature-excitation slots in the doubly salient motor is solved. The shapes of the armature teeth in each phase are completely the same, and the magnetic circuits of each phase are symmetrical, improving the electromagnetic characteristics of the motor.

The invention relates to the field of motors, and discloses a doubly salient permanent magnet motor, which comprises a rotor part, and the rotor part comprises a rotating shaft, a rotor magnet yoke sleeving the axial surface of the rotating shaft, rotor salient poles uniformly arranged along the outer cylindrical surface in the axial direction of the rotor magnet yoke in a convex manner, and a plurality of rotating shaft salient poles uniformly arranged along the axial surface of the rotating shaft; the Hall sensor is integrated on the stator disc, and the rotating shaft salient poles and the rotating shaft are integrally designed, so that extra space occupation in the motor is ingeniously avoided, the space utilization efficiency of the motor is remarkably improved, and the motor is more compact in structure and more compact in structure. Mechanical loss caused by the fact that the rotor part of the Hall sensor is installed on the rotating shaft is effectively reduced, and the operation efficiency and reliability of the motor are improved. Besides, the position of the rotor can be accurately measured only through the Hall sensor on the disc, powerful support is provided for accurate control of the motor, and the performance of the motor is optimized.

According to the electric excitation doubly salient motor torque performance improving method based on current coordination control, the concept of equivalent current is provided by analyzing the influence mechanism of excitation current and armature current on magnetomotive force, and equivalent conversion is carried out on the excitation current and the armature current. On the basis, a current-torque model is established, so that the current distribution ratio enabling the output torque to be maximum is deduced, and distribution of exciting current and armature current is optimized. In addition, an asymmetric current control method is adopted, and the strategy effectively utilizes the reluctance torque for compensation, so that the average torque is further improved, and the torque pulsation is remarkably reduced. According to the method, the optimal current distribution ratio can be calculated in real time under the low-speed and dynamic working condition, dynamic adjustment of the exciting current and the armature current is achieved, and the torque output capacity of the electro-magnetic doubly salient motor is remarkably improved. The method is suitable for application occasions with strict requirements on torque output performance, such as an aviation starting system.

The present invention discloses a current source type driving and charging integrated system and control method for a double-salient-pole motor, comprising a battery, a bidirectional charging and discharging converter, a current source type converter, an electrically excited double-salient-pole motor, and a switching switch, wherein the two-section split excitation winding of the double-salient-pole motor is reused as the DC side energy storage inductor of the current source type converter. In the driving operation mode, the two sections of the excitation winding are connected in parallel in the same direction. By controlling the charge and discharge converter, a constant current can be provided to the DC side when the motor speed is low, and energy feedback can be achieved during the four-quadrant operation and braking of the motor. In the charging operation mode, the two sections of the excitation winding are connected in reverse series to achieve a demagnetization effect, thereby charging the battery while achieving zero torque output. The system is suitable for the driving and charging integrated system of electric vehicles, has the advantages of fewer switching devices and high reliability, saves space and cost, and reduces system losses.

According to the three-phase asymmetry control method for the doubly salient electro-magnetic generator based on the minimum loss, the influence of the load resistance on the fundamental wave flux density of the iron core and the influence of the conduction angle on the harmonic flux density are analyzed, and a more accurate iron loss calculation method is achieved. According to the method, the influence caused by asymmetry of three-phase magnetic circuits of the doubly salient electro-magnetic generator is considered, and the method for calculating the total loss on line under the condition of three-phase asymmetry is provided. A three-phase conduction angle asymmetry control method is provided, optimal efficiency control is realized based on a copper loss model and an iron loss model, and an optimal conduction angle and an optimal asymmetry conduction angle are determined through a disturbance observation method. According to the invention, the loss is effectively inhibited, and the overall efficiency of the power generation system is improved. The method is suitable for application occasions with strict requirements on efficiency, such as an aviation power generation system.

A super capacitor direct connection energy feedback control method based on motor external characteristics comprises the following steps: 1) analyzing structural parameters of an electro-magnetic doubly salient motor, and establishing a field-circuit coupling model and a peripheral driving circuit; 2) dividing data segments, obtaining motor external characteristic data of output voltage and current under different excitation currents, rotating speeds and loads through simulation of multiple working conditions, and preprocessing the data; and 3) initializing a multi-layer perceptron model, taking the motor rotating speed, the target feedback current and the super capacitor voltage as model input, and taking the excitation current reference value as output. 4) deploying the optimal model in a DSP embedded system, and constructing a super capacitor direct connection energy feedback control system based on the external characteristics of the electro-magnetic doubly salient motor. Compared with a traditional PID controller, the control method provided by the invention has the advantages that the control speed and precision are higher, and the energy feedback efficiency is effectively improved.

The invention discloses a six-phase doubly salient electro-magnetic wind generator open-circuit fault harmonic current suppression method, which belongs to the technical field of motor control, and comprises the following steps: firstly, based on full-order decoupling transformation fault-tolerant control, calculating a residual phase fault-tolerant current reference value under a single-phase open-circuit fault of a six-phase doubly salient electro-magnetic motor; secondly, performing positive and negative sequence separation on z1-z2 harmonic sub-plane current of the six-phase electro-magnetic doubly salient motor; then, designing a proportional double-resonance controller PDR; then, a positive and negative sequence rotation integrator is adopted to carry out discretization processing on a proportional double-resonance controller PDR; and finally, according to the z1-z2 harmonic sub-plane voltage signals uz1 and uz2 generated by the proportional double-resonance controller PDR and the alpha-beta plane voltage signals ualpha and ubeta, a converter power tube driving signal is generated. According to the invention, stable operation of the system can be maintained when the motor has a single-phase open-circuit fault, and harmonic current can be effectively suppressed.

The invention relates to the field of gravity energy storage, in particular to a doubly salient permanent magnet linear motor system for gravity energy storage and a motor control method. The stator module comprises a stator core, an armature winding and a permanent magnet; the mover module comprises a mover iron core and mover salient poles; the driving control module comprises an FOC controller, an SVPWM unit and a three-phase two-level inverter. Coordinate system current conversion is realized by the Clark conversion unit and the Park conversion unit; the double-closed-loop PI control unit generates a q-axis current reference value according to an actual speed and a given speed error; and an alpha-beta coordinate system voltage is generated through the inverse transformation unit and is input into the SVPWM unit. The energy conversion efficiency is improved structurally, friction and magnetic leakage loss are reduced, system stability is enhanced, rapid peak and frequency regulation, magnetic circuit optimization and end effect and energy loss reduction are realized through accurate control, accurate control of current and speed is realized in combination with a control circuit, the energy conversion efficiency and system stability are improved, and the energy conversion efficiency and the system stability are improved. The maintenance cost is reduced.

The embodiment of the invention discloses a high-speed electro-magnetic doubly salient motor control method based on a commutation angle closed loop, and relates to the field of electro-magnetic doubly salient motors. Obtaining the position of a three-phase back electromotive force waveform intersection point through simulation, and taking the position as a reference position; three-phase current is obtained through current sampling, and the position of a three-phase current waveform intersection point in each electric period is detected and fed back through the three-phase current waveform intersection point; comparing the position of the intersection point of the three-phase current waveform with a reference position; and adjusting the commutation angle parameter of the next electric period by using the difference between the feedback position and the reference position of the three-phase current waveform intersection point in the current electric period. By adopting commutation angle closed-loop control, the exciting current is determined by a variable step size disturbance and observation algorithm, and the exciting current and commutation angle parameters can be adaptively adjusted, so that the torque capability of the high-speed electro-magnetic doubly salient motor driving system is effectively improved.