Switched reluctance machines sensor redundancy system and automatic switching methodTechnical field
The invention belongs to electric machine speed regulation technical field, more particularly, to a kind of switched reluctance machines sensor redundancy system andAutomatic switching method.
Background technique
With the development of power electronic technique, control technology, switched reluctance machines speed regulating control technology is enable to send out rapidlyExhibition.The control of switched reluctance machines needs to obtain rotor-position.The magnetic resistance of each phase magnetic circuit of switched reluctance machines with rotor anglePosition and become, to make its normal work, it is necessary to open or turn off the electricity of corresponding phase winding when rotor goes to appropriate locationIt is synchronous with corresponding rotor-position to guarantee the electric current of each phase for stream, and in rotor rotation process always each phase of correct switch aroundGroup.Therefore the Angle Position detection of rotor is a very important link.Because of sensorless technology and immature, performance is notHeight, thus currently on the market switched reluctance machines product based on band position sensor product, and it is most of be optoelectronic switch (suddenlyYou switch) formula position sensor.Its principle is the number of phases according to switched reluctance machines, and the different several position sensors of setting are usedIn obtaining position of the rotor relative to stator, mutually exports and test the speed according to the control of the signal of sensor.However this sensor according toSo there is the deficiency of itself: 1, sensor guard grade is relatively low, and vulnerable to the influence of dust, rainwater, sensor is easy to aging, damagesIt is bad；
2, the machining accuracy that photoelectric sensor code-disc is depended on to the detection of motor position, when code-disc machining accuracy is not high, shadowThe precision that speed calculates and motor angle controls is rung, each phase current imbalance, motor oscillating, noise when motor control are easily led toGreatly, and controller power device is easily damaged.
Summary of the invention
Easy to operate the object of the present invention is to provide a kind of strong antijamming capability, error is small, and degree of protection is high, Ke YishiThe automatic switching function of existing fault sensor, improves the switched reluctance machines sensor redundancy of speed-regulating system non-failure operation timeSystem and automatic switching method.
The purpose of the present invention is what is realized by following technical proposals:
Switched reluctance machines sensor redundancy system of the invention, it is characterised in that the magnetic being connected including the motor shaft with motorRing supporting element, the fixed magnet ring on this magnet ring supporting element are fixed on the electric motor end cap and are located at the magnet ring peripherySeveral sensor boards, the interface card being connected with this several sensor board by signal wire are arranged in the sensor boardOn Ns Hall sensor, the signal output interface I on the sensor board upper edge is set, and setting is in the interface electricityA signal output interface II on the interface card is arranged in two signal input interfaces I on the edge Ban Liang of road, thisSignal output interface II is connected with motor control panel,
Be equipped in the interface card multiple selector, fault detection module, failure identification module, input switching switch andOutput dip switch, two signal input interfaces and a signal output interface II with the multiple selector phaseConnection.
The sensor board and interface card is integrated into sensor integration plate, thus the signal on sensor integration plateOutput interface III is connected with the motor control panel.
The number of the Ns Hall sensor is arranged according to the number of phases Ns of motor.
When the described number of motor phases Ns > 3, the number of Hall sensor can negate mode by signal symmetry and reduceNumber.
The magnet ring carries out 2Nr sections of radial magnetizings according to rotor number of poles Nr.
A kind of automatic switching method of switched reluctance machines sensor redundancy system, which is characterized in that the switching magnetic-resistanceElectromechanical transducer redundant system is any switched reluctance machines sensor redundancy system in the claims 1-5；InstituteThe method of stating includes:
It is magnetized magnet ring based on Hall sensor and radial square wave, carries out position detection, and generate detection information；
The motor control that speed, rotor-position signal pass through the signal output interface connection switch reluctance motor of interface cardPlate, to realize to motor speed closed-loop control；
Interface card circuit includes multiple selector, fault detection module, failure identification module, input switching switch, outputSwitching switch, signal input interface, signal output interface；It is closed output dip switch, operation input switching switch, which is in, not to be connectedState is connect, signal input interface, which receives, comes from two or more sensor signals, and two or more fault detection module judgements shouldWhether sensor is working properly, and output failure combinational logic is used for the selection signal of multiple selector, and selection one is trouble-freeOutput of the sensor signal as multiple selector, the motor control panel through signal output interface connection switch reluctance motor；
Output dip switch is opened, switch realization is switched by operation input and manually selects sensor.
The detection method of the fault detection module are as follows: judge input sensor signal whether simultaneously for height or simultaneouslyTo be low, if it is, latching the signal, output fault logic believes level number.
The failure identification module is one group of fixed logic level signal identical with sensor signal digit, when allInput sensor signal breaks down, multiple selector selection this group of signal of output, the motor control for switched reluctance machinesThe breakdown judge that making sheet fails to electromechanical transducer.
Advantages of the present invention:
Switched reluctance machines sensor redundancy system of the invention and automatic switching method, it is simple with extraneous line, it is anti-interferenceAbility is strong, easy to operate, and error is small, and due to no optical element, resistance to greasy dirt is firm, and entire detection device degree of protection is high, is suitble toFor bad environments occasion, the automatic switching function of fault sensor may be implemented, improve the failure-free operation of speed-regulating systemTime.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is switching circuit figure of the invention.
Fig. 3 is the structural schematic diagram of the embodiment of the present invention 2.
Fig. 4 is the switching circuit figure of the embodiment of the present invention 2.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figs 1-4, switched reluctance machines sensor redundancy system of the invention, it is characterised in that including with motorThe magnet ring supporting element 4 that motor shaft is connected, the fixed magnet ring 3 on this magnet ring supporting element 4, be fixed on the electric motor end cap andSeveral sensor boards 1 positioned at 3 periphery of magnet ring, the interface circuit being connected with this several sensor board 1 by signal wireThe Ns Hall sensor 5 on the sensor board 1 is arranged in plate 2, and the signal on 1 upper edge of sensor board is arranged inTwo signal input interfaces I 7 on 2 liang of edges of the interface card are arranged in output interface I 6, and setting is in the interface electricityA signal output interface II 8 on road plate 2, this signal output interface II 8 are connected with motor control panel 9,
It is equipped with multiple selector 10 in the interface card 2, fault detection module 11, failure identification module 12, inputs and cutsChange switch 13 and output dip switch 14, two signal input interfaces 7 and a signal output interface II 8 with it is describedMultiple selector 10 be connected.
The sensor board 1 and interface card 2 is integrated into sensor integration plate 15, thus on sensor integration plate 15Signal output interface III 16 be connected with the motor control panel 9.
The number of the Ns Hall sensor 5 is arranged according to the number of phases Ns of motor.
When the described number of motor phases Ns > 3, the number of Hall sensor 5 can negate mode by signal symmetry and reduceNumber.
The magnet ring 3 carries out 2Nr sections of radial magnetizings according to rotor number of poles Nr.
A kind of automatic switching method of switched reluctance machines sensor redundancy system, which is characterized in that the switching magnetic-resistanceElectromechanical transducer redundant system is any of the above-described switched reluctance machines sensor redundancy system；The described method includes:
It is magnetized magnet ring 3 based on Hall sensor 5 and radial square wave, carries out position detection, and generate detection information；
The motor control that speed, rotor-position signal pass through the signal output interface connection switch reluctance motor of interface card 2Plate 9, to realize to motor speed closed-loop control；
2 circuit of interface card includes multiple selector 10, and fault detection module 11, failure identification module 12, input, which switches, opensPass 13, output dip switch 14, signal input interface, signal output interface；It is closed output dip switch 14, operation input switchingSwitch 13 is in not-connected status, and signal input interface, which receives, comes from two or more sensor signals, two or more failuresDetection module 11 judges whether the sensor is working properly, and selection of the output failure combinational logic for multiple selector 10 is believedNumber, output of the trouble-free sensor signal as multiple selector 10 is selected, through signal output interface connection switch magneticHinder the motor control panel 9 of motor；
Output dip switch 14 is opened, the realization of switch 13 is switched by operation input and manually selects sensor.
The detection method of the fault detection module 11 are as follows: judge the sensor signal of input whether simultaneously to be high or sameWhen to be low, if it is, latching the signal, output fault logic believes level number.
The failure identification module 12 is one group of fixed logic level signal identical with sensor signal digit, works as instituteThere is output transducer to break down, selection this group of signal of output of multiple selector 10, the motor control for switched reluctance machinesThe breakdown judge that making sheet 9 fails to electromechanical transducer.
Embodiment 1: as depicted in figs. 1 and 2,
System is made of two sensor boards 1, interface card 2, magnet ring 3, magnet ring supporting element 4.According to motor on sensor board 1The number of phases arrange 3 Hall sensors 5 and its relevant signal processing circuit, the edges of boards of sensor board 1 are along arrangement signal outputInterface I 6.Sensor board 1 is connected to interface card 2 by signal wire, and there are two signal inputs to connect for arrangement on interface card 2Mouth I 7, faulty automatic switch-over circuit is arranged in a signal output interface II 8, and the feelings of 1 failure of sensor board all the way may be implementedUnder condition, spare sensor board 1 is automatically switched to.Magnet ring 3 connects according to 16 sections of radial magnetizings of rotor number of poles, sensor board 1Interface circuit board 2 is fixed on electric motor end cap；Magnet ring 3 is fixed on magnet ring supporting element 4, and magnet ring supporting element 4 connects motor shaft, with motorAxis rotates synchronously.Speed, rotor-position signal pass through the II 8 connection switch reluctance motor of signal output interface of interface card 2Motor control panel 9, thus realize to motor speed closed-loop control.
The switched reluctance machines sensor redundancy system of the embodiment of the present invention 1, it is automatic when may be implemented sensor faultSwitching, 2 circuit of interface card include multiple selector 10, and fault detection module 11, failure identification module 12, input, which switches, opensPass 13, output dip switch 14, signal input interface I 7, signal output interface II 8.Its working principle is that closure output switchingSwitch 14, operation input switching switch 13 are in not-connected status, and input interface, which receives, comes from two or more sensor signals,Two or more fault detection modules 11 judge whether the sensor is working properly, and output failure combinational logic is used for multi-path choiceThe selection signal of device 10 selects output of the trouble-free sensor signal as multiple selector 10, connects through signal outputThe motor control panel 9 of II 8 connection switch reluctance motors of mouth.Output dip switch 14 is opened, switch 13 is switched by operation inputAlso it may be implemented to manually select sensor.
Multiple selector 10 can be built by discrete devices such as data selectors, can also can be compiled using cpld or fpga etc.Journey device is realized.
The detection method of fault detection module 11 be judge input sensor signal whether for height or be simultaneously simultaneouslyLow, if it is, latching the signal, output fault logic believes level number.This module can realize with combinational logic gate circuit,It can also be realized with programmable logic circuit.
Failure identification module 12 is one group of fixed logic level signal identical with sensor signal digit, when all outputsSensor breaks down, selection this group of signal of output of multiple selector 10, and the motor control panel 9 for switched reluctance machines is rightThe breakdown judge of electromechanical transducer failure.
Automatic switch-over circuit can be individually placed in interface card 2, also be desirably integrated into sensor board 1, simplify installation knotStructure.
Embodiment 2: as shown in Figure 3 and Figure 4,
Sensor board 1 and interface card 2 are integrated into sensor integration plate 15, thus the signal on sensor integration plate 15 is defeatedOutgoing interface III 16 is connected with the motor control panel 9.
System is made of two sensor integration plates 15, magnet ring 3, magnet ring supporting element 4.According to electricity on sensor integration plate 15The number of phases of machine arranges 3 Hall sensors 5 and its relevant signal processing circuit, switching circuit, and edges of boards are along arrangement signal outputInterface III 16 and signal input interface II 17.Faulty automatic switch-over circuit is arranged in sensor integration plate 15, this biography may be implementedIn the case where 1 failure of sensor plate, backup sensors plate 1 is automatically switched to.Magnet ring 3 is filled according to 16 sections of radial directions of rotor number of polesMagnetic, sensor integration plate 15 are fixed on electric motor end cap；Magnet ring 3 is fixed on magnet ring supporting element 4, and magnet ring supporting element 4 connects motorAxis is rotated synchronously with motor shaft.Speed, rotor-position signal pass through the electricity of III 16 connection switch reluctance motor of signal output interfaceMachine control panel 9, to realize to motor speed closed-loop control.
The switched reluctance machines sensor redundancy system of the embodiment of the present invention 2, it is automatic when may be implemented sensor faultSwitching, switching circuit include multiple selector 10, and fault detection module 11, failure identification module 12, input switches switch 13, defeatedSwitch switch 14, signal input interface II 17, signal output interface III 16 out.II 17-1 of signal input interface is spare for connectingSensor board 1, II 17-2 of signal input interface are used to connect the sensor signal of current sensor plate 1, its working principle is that, it closesOutput dip switch 14 is closed, operation input switching switch 13 is in not-connected status, and signal input interface II 17, which receives, comes from twoA or multiple sensor signals, two or more fault detection modules 11 judge whether the sensor is working properly, export failureCombinational logic is used for the selection signal of multiple selector 10, selects a trouble-free sensor signal as multiple selector 10Output, the motor control panel 9 through III 16 connection switch reluctance motor of signal output interface.Output dip switch 14 is opened, is led toCrossing operation input switching switch 13 also may be implemented to manually select sensor.
Multiple selector 10 can be built by discrete devices such as data selectors, can also can be compiled using cpld or fpga etc.Journey device is realized.
The detection method of fault detection module 11 be judge input sensor signal whether for height or be simultaneously simultaneouslyLow, if it is, latching the signal, output fault logic believes level number.This module can realize with combinational logic gate circuit,It can also be realized with programmable logic circuit.
Failure identification module 12 is one group of fixed logic level signal identical with sensor signal digit, when all outputsSensor breaks down, and selection this group of signal of output of multiple selector 10 passes motor for switched Reluctance Motor Control plateThe breakdown judge of sensor failure.
Switched reluctance machines sensor redundancy system of the invention and automatic switching method, it is simple with extraneous line, resistInterference performance is strong, easy to operate, and error is small, and due to no optical element, resistance to greasy dirt is firm, and entire detection device degree of protection is high,Suitable for bad environments occasion, the automatic switching function of fault sensor may be implemented, improve the fault-free of speed-regulating systemRuning time.