122 results about "Switched reluctance motor drive" patented technology

According to one embodiment of the invention, a method includes generating, by a computer, a phase current profile, generating a phase current according to the phase current profile, and applying the phase current to the switched reluctance motor drive. Generating the phase current profile includes initializing one or more first profile parameters which define at least a first portion of the phase current profile. Generating the phase current profile also includes determining whether a first performance criterion is satisfied based on operation of the switched reluctance motor drive using the first profile parameters. Generating the phase current profile also includes updating at least one the first profile parameters if the first performance criterion is not satisfied.

A switched reluctance motor includes an inner stator having a plurality of stator poles with coil windings, the inner stator having a plurality of stator phases, an outer rotor configured to rotate around the inner stator, the outer rotor having a plurality of rotor poles, at least one position sensor configured to detect a position of the outer rotor, and a DC supply configured to sequentially supply current to excite the stator phases.

The invention provides a power converting device integrated with switch magnetic resistance motor driving and cell charging. The power converting device comprises H-type asymmetric half bridges arranged at each motor winding, the windings are at least three phases, an asymmetric half bridge circuit formed by each motor winding is arranged at two ends of an energy storing module in parallel, a voltage stabilization capacitor is connected in parallel with the asymmetric half bridge circuits, two ends of the energy storing module are provided with charging capacitors in parallel, in one of the asymmetric half bridge circuits, a switch part is arranged between a second electrode of a first electric power electronic switch device and a cathode of a second diode, the voltage stabilization capacitor and the charging capacitors are respectively arranged at two sides of a contactor switch, and an alternating current electric network single-phase power source is respectively connected with the other two asymmetric half bridge circuits through electric network interfaces. The power converting device realizes dual function time division multiplexing of motor driving and cell charging, effectively avoids disadvantages of extra additionally-arranged devices, complex structure and high cost in the prior art and has advantages of simple structure, low cost and convenient use.

A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter. And a current control feedback loop (976) component that uses an established current control signal and a signal indicative of the current flowing through a stator winding (505,508) of the TPSRM to dynamically adjust a second parameter.

The invention discloses an SRM system based on a function integrated converter, and the system is suitable for a plug-in hybrid vehicle driven by an SRM. ON / OFF of switch tubes of a front-end circuit is controlled to realize multiple function and operation modes; in a generator power supply model, the winding voltage is improved by a battery pack; in a battery power supply model, the winding voltage is improved by a capacitor; and multi-level power supply is realized, and further winding excitation and demagnetization are accelerated. Due to the multi-level mode, the torque output capability of the motor is improved obviously. In the electric and braking process, the battery pack can realize charging via multiplexing of windings and control of the converter; and when the vehicle is static, the battery pack can be charged flexibly via an external power supply, and extra charging equipment is not needed. The switch tubes in the converter is controlled to realize energy conversion among the generator, the battery pack, the external power supply and the motor flexibly.

The invention relates to a power converter for a switched reluctance motor of a battery-supercapacitor electric vehicle. According to the invention, a power converter topology, in which a battery and a supercapacitor are cascaded with an asymmetry half-bridge circuit of the switched reluctance motor through a three-switch series dual-input DC-DC converter, is adopted to act a main power converter of a battery-supercapacitor hybrid power electric vehicle switched reluctance motor driving system, a source end DC-DC converter can realize dual-source access of the battery and the supercapacitor, a rear-stage asymmetry half-bridge power converter is enabled to be adjustable in bus voltage, and a rear-stage asymmetry half-bridge power circuit can realize driving control for the switched reluctance motor. The power converter provided by the invention can realize requirements of battery-supercapacitor dual-storage energy input control and switched reluctance motor driving control simultaneously. In addition, the power converter effectively saves switch tube resources, can further reduce the system cost and the size, and has the advantages of high integration, light weight, low cost and the like.

In the fast chopper circuit and method of the switched reluctance motor drive system, the current sampling circuit (4) collects the instantaneous value of the phase winding current of the motor, and transmits it to the microprocessor (1) in real time, and the microprocessor (1) judges the motor Whether the instantaneous value of the phase winding current needs chopping, and output the pulse width modulation signal and the chopping signal according to the judgment result. Control signal to control its upper switch tube. After the microprocessor (1) makes an internal judgment, it outputs the pulse width modulation signal and the chopping signal to the two-input AND gate (2) through the pulse width modulation module (11) and the input and output module (12): if the current is higher than the chopping signal If the current is lower than the lower limit of chopping, the chopping signal is set high to turn on the upper tube of the power converter (3). Control signal; realize fast chopping control of the power converter.

A propulsion unit for a watercraft including a prop which is adapted for producing thrust when rotated, and an electric motor drivingly coupled to the prop. The electric motor is of the switched reluctance type which includes a stator, formed of a plurality of windings, and a rotor having a plurality of poles about the circumference of the rotor. The stator windings are divided into a plurality of phases which are sequentially energized by electric current. A controller is coupled to the electric motor to determine the order and timing of phase energization. Proper sequencing of the phase energization creates a dynamic magnetic field inducing the rotor to rotate accordingly.

A quantitative evaluation method for the reliability of a Markov model switch reluctance motor system. The method comprises: solving a probability matrix P′T(t) of a switch reluctance motor system being in any survival state at any time t via a state conversion diagram of the switch reluctance motor system; calculating the sum of various elements of the probability matrix P′T(t) of the survival state, so that a reliability function R(t) is obtained; and thus calculating the average working time of the switch reluctance motor system before failure, thereby realizing the quantitative evaluation of the switch reluctance motor system and satisfying the requirements for the reliability analysis of a switch reluctance motor drive system. This disclosure has a good engineering application value.

The invention provides a conversion device capable of integrating drive and low-voltage battery charging of a switch reluctance motor. The conversion device capable of integrating drive and low-voltage battery charging of the switch reluctance motor comprises a high-voltage energy-storing module, a driving module which is connected with the high-voltage energy-storing module, a control module which is connected with the driving module, and also a direct current (DC)-direct current (DC) conversion module which is connected with the control module and the driving module, wherein low-voltage electric energy is stored in a low-voltage energy-storing module and used to supply power to low-voltage equipment. The control module is used to control operation of the driving module and the low-voltage energy-storing module according to preset procedures. The driving module drives operation of the switch reluctance motor, is used to receive a command of a control unit to drive the DC-DC conversion module, and charges the electric energy of the high-voltage energy-storing module to the low-voltage energy-storing module. Meanwhile, the function of the drive and low-voltage battery charging of the switch reluctance motor is integrated, not only is device space saved, but also time sharing multiplexing of the device is achieved. Cost of a component and complexity of wiring of a circuit board are greatly reduced so that a hardware structure is more compact.

The invention discloses a phase current reconstruction method for a switch reluctance machine based on a bus current sensor. A modular power converter in a switch reluctance machine drive system consists of one three-phase full-bridge switching module and one half-bridge switch module, wherein a motor winding is in star-shaped connection and a central line is led out. The method just needs one buscurrent sensor, and achieves the phase current reconstruction through the injection of a PWM signal into a switching tube and the decoupling of a bus current. The method can obtain a complete phase current waveform, and reduces the number of current sensors and the number of analog-digital converter channels. The employed modular power sensor facilitates the reduction of the cost of the drive system and the improvement of the integration degree and reliability of the system.

The invention provides a split-phase excitation power topological structure of a switched reluctance motor, and belongs to the field of motors. The structure aims to solve the problems that windings of each phase of an existing drive power structure of the switched reluctance motor feed back energy to a power supply in the free-wheeling switching off process, the voltage of the power supply does not rise, the free-wheeling time is short, and system work efficiency is low. The split-phase excitation power topological structure comprises an A-phase winding, a B-phase winding, a C-phase winding, a power supply filtering capacitor C0, a switching tube S1, a switching tube S2, a switching tube S3, a switching tube S4, a switching tube S5, a switching tube S6, a free-wheeling diode D1, a free-wheeling diode D3, a free-wheeling diode D5, a free-wheeling diode Dab, a free-wheeling diode Dbc, a free-wheeling diode Dca, an isolating anti-reflow diode D2, an isolating anti-reflow diode D4, an isolating anti-reflow diode D6, an A-phase winding bus capacitor Cca, a B-phase winding bus capacitor Cab and a C-phase winding bus capacitor Cbc. The switching tubes from S1 to S6 are identical in structure. The split-phase excitation power topological structure is used for the switched reluctance motor.

The invention pertains to the field of agricultural machinery, in particular to a mechanical ventilation dehumidifier used for plastic houses and greenhouses, which consists of air supply fans, air supply channels, a control device, a testing device and exhaust fans. Heaters are arranged in the air supply channels; the control device consists of switching groups, single board computers or control machines; the testing device comprises a thermometer, a hygrometer and a carbon dioxide analyzer; the heaters take fiber material as a heating body; the air supply fans and the exhaust fans use switched reluctance motors. By using sunlight shed chambers that are generally used at present, adopting advanced carbon fiber material as the heating body and being driven by switched reluctance motors with high efficiency and energy saving, the invention can realize double-machine synchronization, so as to achieve the purposes of energy saving with high heat efficiency, stability, reliability, and being free of maintenance, thus being capable of adjusting indoor humidity and air conditions. The invention can be broadly applied to sunlight sheds and livestock and poultry greenhouses.

A regenerative switched reluctance motor and a motor drive system therefor are provided. The motor has a rotor 33 with stacked rotor units 33a-33d each comprising 2n salient poles and a stator 31 with stacked stator units 31a-31d surrounding and corresponding to the rotor units and each comprising 4n magnetic poles to form a predetermined gap with the salient poles of the corresponding rotor unit. A first excitation coil 32(A) is wound on every other one of the 4n magnetic poles of each stator unit, while a second excitation coil 32(B) is wound on the remaining magnetic poles thereof. The rotor units are sequentially shifted by a predetermined angle in angular position relative to the stator units. The switched reluctance motor and the motor drive system can efficiently drive the motor and recover regenerative power with little torque ripple and noise.

A switched reluctance motor includes an inner stator having a plurality of stator poles with coil windings, the inner stator having a plurality of stator phases, an outer rotor configured to rotate around the inner stator, the outer rotor having a plurality of rotor poles, at least one position sensor configured to detect a position of the outer rotor, and a DC supply configured to sequentially supply current to excite the stator phases.

The invention provides a converter fault diagnosis method in the driving of a switched reluctance motor drive and a converter. The converter comprises a three-phase converter body circuit, a standby power switching device, and a relay network. The standby power switching device is electrically connected to the three-phase converter body circuit via the relay network. The method comprises controlling the on / off state of the power switching device of the converter by a control signal, adding a preset target signal to the control signal, acquiring the amplitude and frequency of a high-frequency current signal when the power switching device of the converter is in different states, and finally determining the fault type of the converter in the SRM drive system according to the magnitude and frequency of the high-frequency current signal. Therefore, no additional sensors are needed to detect the failure of the power switching device, the complexity of the system is reduced, and the fault type and the fault location of the converter can be determined in real time at high precision and high speed.

An electric grinder with a switched reluctance motor comprises a body, a transmission assembly, a grinding wheel, and a dust-proof assembly. The body includes a first casing and a second casing. The transmission assembly includes a switched reluctance motor disposed in the first casing, a driving module disposed in the second casing, a transmission shaft connected with the switched reluctance motor, and an assemblage seat disposed in the transmission shaft. The assemblage seat includes an assemblage member for assembling the grinding wheel. The dust-proof assembly includes a dust-proof hood disposed in the first casing. Because of being driven by the switched reluctance motor, the electric grinder of the present invention adapts to the cases of phase failure, frequent start-stop operations, and phase inversion.

The invention provides a switched reluctance type gearless tractor, which comprises an electric motor, a traction wheel, a sensor and at least two brakes, wherein the electric motor is a switched reluctance motor; the switched reluctance motor comprises an engine base, a rotor and a stator; the switched reluctance motor drives the traction wheel to rotate to provide a traction driving force for the running of an elevator; the rotor and the stator are installed on the engine base; the sensor is installed inside the engine base; a controller controls on-off of each phase winding of the stator according to a certain rule and position information of the rotor detected by the sensor to produce the electromagnetic torque to drive the rotor to rotate, so as to produce the driving force; and the brakes are installed on two sides of the engine base. The tractor of the invention adopts the switched reluctance motor to drive the traction wheel to rotate, and the rotor is formed by the overlapping of a rotating shaft and a salient pole silicon steel sheet. In comparison with the prior art, the tractor of the invention greatly simplifies the structure of the tractor, greatly reduces the cost of a complete machine, and is compact in structure and small in volume.

The invention provides a precision strike digital control method for a spindle press. The method is characterized by comprising the following steps: 1, inputting equipment data and operation data; 2, calculating the rotating speed omega of a switch reluctance machine and the rotating speed accuracy delta omega needed by an electric motor controller according to the formula: E=1 / eta(Wd+(F / 2C)), delta E=(F / eta C)delta F, omega=square root 2E / (J1+J2 / i) and delta omega=(delta E / (J1+J2 / i)omega) so as to control the action of the switch reluctance machine; and 3, driving a spindle press to act by the switch reluctance machine. The rotating speed omega and the rotating speed accuracy delta omega of a driving motor of the spindle press are directly controlled by the equipment data and the operation data, thereby effectively improving the strike precision of the spindle press, improving the quality and the consistence of workpieces, and prolonging the service life of a die.

The invention relates to a switched reluctance motor driving control system, an angle control device and a method. The switched reluctance motor angle control method comprises the following steps that: 1, a corresponding relationship table of the given torque value and the conduction width is set in advance under each rotating speed point; 2, the corresponding conduction width under the actual given torque value and the actual feedback rotating speed is calculated through an interpolation algorithm; and 3, the angle control is carried out according to the front displacement angle and the conduction width obtained through the calculation, wherein a turn-off angle is changed along with the rotating speed, during the electric control, the turn-off angle can be obtained by subtracting the front displacement angle from 180 degrees, and a turn-on angle can be obtained by subtracting the conduction width from the turn-off angle; and during the brake control, the turn-off angle can be obtained by subtracting the front displacement angle from 360 degrees, and the turn-on angle can be obtained by subtracting the conduction width from the turn-off angle. The switched reluctance motor driving control system, the angle control device and the method solve the problems that when the fixed conduction width is adopted in the existing full pulse width modulation (PWM) controller, too high temperature rise of switch semiconductor devices can be easily caused, and the efficiency in the full speed and the torque range cannot be integrally optimized.

The invention discloses a thyristor-based magnetic field modulation switched reluctance motor driving system, which belongs to the technical field of motors and comprises a direct-current power supply, a plurality of single-phase inversion units and a direct-current injection bridge arm, wherein each single-phase inversion unit comprises an upper thyristor, a lower thyristor, an intermediate switch tube and anti-parallel diodes thereof, and the upper thyristor, the lower thyristor, the intermediate switch tube and the anti-parallel diodes form an inversion circuit; the output port of each single-phase inversion unit is connected with one end of each phase winding of the switched reluctance motor, and sinusoidal current with direct current bias is injected into each phase winding of the switched reluctance motor; and the direct current injection bridge arm is connected with a motor winding neutral point and provides a circulation path for a direct current bias component of the sinusoidal current. By introducing the low-cost thyristor and the equivalent SVPWM modulation method, the number of IGBTs is reduced while the inversion function is achieved, and the system cost and the size are effectively reduced.

An electric vehicle switch reluctance motor driver possessing a charging function belongs to the switch reluctance motor technology field. The driver is characterized in that the driver comprises a direct-current power supply, a boost unit, a voltage reduction unit, multiphase winding control units and a control system which controls the boost unit, the voltage reduction unit and each phase of winding control unit; the direct-current power supply is connected to the boost unit and the voltage reduction unit simultaneously; the boost unit and the voltage reduction unit are connected to each phase of winding control unit simultaneously; each phase of winding control unit is connected to a corresponding winding in a switch reluctance motor respectively; and a charging interface is connected in parallel between each phase of winding control unit and the corresponding winding in the switch reluctance motor. Through the electric vehicle switch reluctance motor driver possessing the charging function of the invention, the switch reluctance motor can be driven to work; simultaneously, the direct-current power supply in the switch reluctance motor can be charged; and charging flexibility of an electric vehicle is increased, which is good for electric vehicle popularization.

Provided is a regenerative switched reluctance motor driving system which allows a motor to have a reduced size and weight and an increased efficiency as well as improved energy recovery efficiency at the time of regenerative braking without using a neodymium magnet. Based on an angular position of a rotor in the motor, a constant current flip-flop circuit 2 renders two current paths alternately conductive so as to allow a rectangular-wave current having a width of an electrical angle of 180° to alternately flow in two coils in the motor 3, and shifts the timing of rendering the two current paths alternately conductive, between when driving and when braking the motor 3, by a time during which the rotor is rotated by an angle corresponding to an electrical angle of 180°. When driving the motor, a DC constant current power supply unit 1 discharges a DC power supply, while when braking the motor, it receives an input current through a negative terminal of the DC power supply, and outputs a DC current to the constant current flip-flop circuit 2, and further outputs a DC current regenerated from the motor 3 through the constant current flip-flop circuit 2 to a positive terminal of, and thereby charges, the DC power supply.

A variable speed drive with a boost converter is provided for a chiller system driven by a switched reluctance motor. The boost converter can be a diode or thyristor rectifier followed by a boost DC / DC converter or a three-phase pulse width modulated boost converter. The boost converter provides a boosted voltage to the DC link, which results in a boosted voltage being applied to the switched reluctance motor by the inverter of the variable speed drive.

A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter. And a current control feedback loop (976) component that uses an established current control signal and a signal indicative of the current flowing through a stator winding (505,508) of the TPSRM to dynamically adjust a second parameter.

The invention relates to a three-level Markov model switch magnetic resistance motor system reliability quantitative evaluation method. According to the method, system operation states of a switch magnetic resistance motor-driven system in a first-level fault, a second-level fault and a third-level fault are analyzed to acquire that 4 valid states and 1 invalid state exist in the first-level fault, 14 valid states and 4 invalid states exist in the second-level fault, 43 valid states and 14 invalid states exist in the third-level fault, the initial normal state and a final invalid state are further considered, so 62 valid states and 20 invalid states exist in a three-level Markov model, a state transfer graph of the switch magnetic resistance motor system in the third-level faults is established, a state transfer matrix is acquired, a probability matrix P(t) of the system in the valid states can be acquired through operation, sum of elements of the valid state probability matrix P(t) is calculated, average faultless time is calculated through the reliability function R(t), and so reliability evaluation of the three-level Markov model quantitative analysis switch magnetic resistance motor system is realized. The method has great engineering application values.

The invention provides a weaving machine transmission and weaving machine position automatic calibration system driven by a switch reluctance motor. A motor stator of the switch reluctance motor is fixedly arranged on a machine frame, the motor rotor is fixedly connected with a main motor gear shaft supported on the machine frame through a bearing, one end of the main motor gear shaft is connected with a piston through a bearing, and the piston is fixedly connected with a movable insertion pin arranged in a guide hole formed in the machine frame, so the insertion pin forms cylinder pair connection with the machine frame, the piston is arranged in a piston cylinder fixedly arranged on the machine frame, in addition, the cylinder pair connection is formed, the piston is matched with the insertion pin, and can transversely move but cannot rotate; the main motor gear shaft is engaged with an opening transmission gear fixedly connected onto an opening transmission shaft through a shaft gear, the opening transmission shaft is fixedly connected with an armature of an opening brake through a spring, the two ends of the opening transmission shaft are respectively connected with an encoder and an opening mechanism, and a coil of the opening brake is fixedly connected with the machine frame. The weaving machine transmission and weaving machine position automatic calibration system has the characteristics that the mechanism is reasonable, the use is convenient and reliable, the speed of a weaving machine can be accelerated, the speed change and position calibration automation degree of the weaving machine can be improved, and the like.

The invention relates to a cable winding system, in particular to a cable drum driven by a switched reluctance motor speed regulating system. The cable drum comprises a cable drum body, the switched reluctance motor speed regulating system and a speed reducer. The switched reluctance motor speed regulating system comprises a switched reluctance motor, a controller and a position detector; the switched reluctance motor is connected with the speed reducer, and a spindle output end of the speed reducer is connected with the cable drum body; the switched reluctance motor drives the speed reducer to provide a driving force for the cable drum so as to drive the cable drum body to pay off and take up cables synchronously along with a cable drum on mobile equipment; the position detector is arranged at one end of the switched reluctance motor and used for detecting rotation speed and angular displacement of a rotor in the switched reluctance motor; the controller receives rotation speed signals and angular displacement signals detected by the position detector and adjusts rotation speed and rotation direction of the cable drum by the aid of peripheral operations. The cable drum has the advantages of low energy consumption, wide speed regulation range and effectiveness in cable protection.