CN103475292B - A kind of switch reluctance generator system realizing quick-response excitation/demagnetization - Google Patents
A kind of switch reluctance generator system realizing quick-response excitation/demagnetization Download PDFInfo
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Abstract
The invention discloses a kind of switch reluctance generator system realizing quick-response excitation/demagnetization, comprise switched reluctance machines body, prime mover, position transducer, power inverter, DC power supply and controller, described power inverter is four level power converters.The present invention owing to adopting four level power converters, in the excitation stage, under Angle-domain imaging mode, the exciting current of phase winding is increased, magnetic field energy is increased, thus increases the power output of whole electricity generation system, make it easily reach rated power; Under Current cut control mode, excitation time will reduce, and can realize quick-response excitation, and the time of power generating stage is increased, and the energy output of motor increases, and the power output of system is increased; At power generating stage, when employing two voltage sources, quick demagnetization can be realized.
Description
Technical field
The invention belongs to the drived control of switch reluctance generator and the technical field of power inverter design, particularly a kind of switch reluctance generator system realizing quick-response excitation/demagnetization.
Background technology
Switched reluctance machines to be combined with traditional reluctance machine a kind of novel buncher grown up by power electronic technology, digital control technology, has that structure is simple, firm, cost is low, reliable operation, control is flexible, operational efficiency is high, detent torque is low, fault-tolerant ability is a strong feature.When switched reluctance machines is as generator operation, there is good adjusting function, can stable operation in wider velocity interval, export constant direct current, adapt to different load requests; Because the structure of switched reluctance machines is simple, the moment of inertia of rotor is little, and detent torque is low, makes it can make high-revolving Blast Furnace Top Gas Recovery Turbine Unit (TRT), and has higher efficiency and power density, is well suited for in wind power generation and aviation electricity generation system.Switch reluctance generator has stronger fault-tolerant operation ability, when certain breaks down mutually, still can stable operation, and greatly strengthen the reliability of whole electricity generation system, be particularly suitable for the occasion being used in some bad environments He there is particular/special requirement.
Switch reluctance generator system is primarily of switched reluctance machines body, prime mover, position transducer, power inverter, DC power supply and controller composition, and the structured flowchart of its system as shown in Figure 1.The power inverter used in typical switch reluctance generator system is asymmetrical half-bridge power inverter, its circuit topology as shown in Figure 2, according to the situation about turning on and off of two main switching devices of each phase upper and lower bridge arm, as shown in Figure 3, the state 1 shown in Fig. 3-1, Fig. 3-2 and Fig. 3-3, state 0 and state-1 three kind of different running status (for A phase) can often be had mutually.Wherein, state 1 is two main switching devices of upper and lower bridge arm situations when being simultaneously in conducting, and motor is in the excitation stage, and now the voltage at phase winding two ends is direct current power source voltage U
c; State 0 is that the main switching device of upper brachium pontis is in off state, the main switching device of lower brachium pontis is in situation during conducting state, now the voltage at phase winding two ends is 0, and motor is in freewheeling state, and phase current carries out afterflow by the main switching device of fly-wheel diode and lower brachium pontis; State-1 is the main switching device of upper and lower bridge arm situation when being simultaneously in shutoff, and now the voltage at winding two ends is-Uc, and motor is in power generating stage, and phase current forms feedback circuit by two fly-wheel diodes and DC power supply.
During switch reluctance generator system employing asymmetrical half-bridge power inverter, the magnitude of voltage at excitation stage phase winding two ends and the size of phase current proportional, exciting voltage is larger, the last exciting current of phase winding is larger, the energy that motor-field stores is more, more be conducive to generating, and when exciting voltage is larger, motor winding can realize quick-response excitation; And at power generating stage, if rotating speed is lower, generating voltage is greater than Based Motional Electromotive Force, phase current just can not continue to increase at power generating stage, generator system is caused effectively to generate electricity, so switch reluctance generator system will be made effectively to generate electricity, must ensure that generating voltage is less than Based Motional Electromotive Force.Because in asymmetrical half-bridge power inverter, the excitation stage is identical with the magnitude of voltage of power generating stage, independent regulation can not be carried out, be unfavorable for control and the effectively generating of switch reluctance generator, thus cause motor when rotating speed is lower, the power output of system is lower, does not reach the rated power of motor.
Summary of the invention
The present invention is directed to the deficiency of the switch reluctance generator system that existing asymmetrical half-bridge power inverter drives, provide a kind of novel switch reluctance generator system realizing quick-response excitation/demagnetization, for increasing the power output of generator system, under corresponding control strategy, make its power output reach the power-handling capability of motor, wherein power inverter adopts four novel level power converters.Within the system, exciting voltage and generating voltage can get different magnitudes of voltage, are convenient to regulating and controlling.Two voltage sources are adopted to power to motor winding in the excitation stage, thus realize quick-response excitation, increase the phase current rate of rise, and at power generating stage, dynamically select use voltage source according to the magnitude of voltage size of storage capacitor or use two voltage sources, when use two voltage sources, the motor demagnetization time can be reduced, realize demagnetizing fast.
The technical problem that the switch reluctance generator system driven to solve asymmetrical half-bridge power inverter exists, the present invention is achieved by the following technical solutions:
Realize a switch reluctance generator system for quick-response excitation/demagnetization, comprise switched reluctance machines body, prime mover, position transducer, power inverter, DC power supply and controller;
Described power inverter is four level power converters, comprises each phase winding m of DC power supply, switch reluctance generator, filter capacitor C
dc, storage capacitor C
dc1, device for power switching Q1 and the device for power switching Q be in series with each phase winding
mH, Q
mL, power diode D1 and form the power diode D of continuous current circuit with each phase winding
m2, power diode D
m3; Filter capacitor C
dcbe connected in parallel on DC bus end, and with storage capacitor C
dc1series connection;
Device for power switching Q in four described level power converters
mH, Q
mLdirectly be connected with each phase winding of switch reluctance generator; Device for power switching Q
mHfor the device for power switching of upper brachium pontis, device for power switching Q
mLfor the device for power switching of lower brachium pontis, the upper end of each winding of switch reluctance generator meets the device for power switching Q of corresponding upper brachium pontis respectively
mHemitter, the lower end of each winding of switch reluctance generator meets the device for power switching Q of corresponding lower brachium pontis respectively
mLcollector electrode, the device for power switching Q of upper brachium pontis
mHcollector electrode and storage capacitor C
dc1positive pole be connected, the device for power switching Q of lower brachium pontis
mLemitter connect the ground of DC power supply; Power diode D1, D
m2and D
m3for the fly-wheel diode of each winding of switch reluctance generator, every phase winding carries out afterflow with two power diodes respectively, power diode D
m2anode and power supply ground be connected, its negative electrode receives the device for power switching Q of the upper end of motor winding and the upper brachium pontis of this winding switching
mHemitter; Power diode D
m3anode and the device for power switching Q of the lower end of motor winding and the lower brachium pontis with this winding switching
mLcollector electrode be connected, the collector electrode of its negative electrode and device for power switching Q1 is connected with the anode of the power diode D1 shared; Share negative electrode and the storage capacitor C of power diode D1
dc1positive pole be connected; The emitter of device for power switching Q1 and the positive pole of power supply and storage capacitor C
dc1negative pole be connected, its collector electrode and power diode D
m3negative electrode be connected with the anode of power diode D1 shared.
It is use voltage fed or use two voltage feds that device for power switching Q1 determines switch reluctance generator winding two ends, wherein, phase winding in the excitation stage by two voltage feds, the phase current rate of climb is accelerated, current curve slope increases, when adopting Angle-domain imaging mode, magnetic field will increase in the energy storage in excitation stage, the initial current entering power generating stage will be increased, and generating voltage can dynamically be selected, so easily obtain desirable current waveform, the power output of system is increased; When adopting Current cut control mode, excitation time will reduce, and can realize quick-response excitation, the time of prolongation power generating stage, and the voltage of power generating stage also can Dynamic Selection, so the energy output of whole system and power output will be increased; At power generating stage, when employing two voltage sources time, the time used of demagnetizing will reduce, and can realize quick demagnetization.
The transient current of current sensor to each phase winding of motor and DC bus end can be adopted in four level power converters to detect, the voltage of voltage sensor to DC bus end and storage capacitor can be adopted to detect, realize voltage protection; The positional information of the pulse signal determination rotor of controller load position transducer; and with the voltage of the transient current of each phase winding of motor and storage capacitor for according to controlling motor; realize Current cut control; Angle ambiguity, the control strategy that PWM control and current/voltage protection etc. are relevant.
Owing to adopting technique scheme, a kind of switch reluctance generator system realizing quick-response excitation/demagnetization provided by the invention, compared with prior art, has such beneficial effect:
In the present invention, because switch reluctance generator system adopts four level power converters, its operating state has state 2, state 0, state-1 and state-2 four kinds of mode of operations (for A phase), thus control strategy is abundanter, adopt state 2 pairs of motor windings to carry out excitation in the excitation stage always, the phase current rate of climb is accelerated, and current curve slope increases; When adopting Angle-domain imaging mode, magnetic field energy increases, and the initial current entering power generating stage will be increased; When adopting Current cut control mode, excitation time will reduce, and realize quick-response excitation, extend the time of power generating stage; At power generating stage, whether the magnitude of voltage according to storage capacitor selects using state-1 or state-2 dynamically in normal range (NR), and when using state-1, generating voltage is less, switch reluctance generator system can be made relatively easily to realize effective generating, obtain desirable current waveform; When using state-2, winding current can be made to drop to zero rapidly, thus realize demagnetization fast.
The present invention is owing to adopting four level power converters, and under Angle-domain imaging mode, the exciting current of winding obtains increase, and magnetic field energy have also been obtained increase, thus can increase the power output of whole electricity generation system, makes it easily reach rated power; Under Current cut control mode, excitation time reduces, and the time of power generating stage obtains increase, and the energy output of motor increases, and the power output of system is increased.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of switch reluctance generator system;
Fig. 2 is the circuit topological structure of asymmetrical half-bridge power inverter;
Fig. 3 is three kinds of operating states of asymmetrical half-bridge power inverter, and wherein, Fig. 3-1 is state 1, Fig. 3-2 be state 0, Fig. 3-3 is state-1;
Fig. 4 is four level power converters that the present invention adopts;
Fig. 5 is four kinds of operating states of four level power converters that the present invention adopts, wherein: Fig. 5-1 is state 2, Fig. 5-2 be state 0, Fig. 5-3 be state-1, Fig. 5-4 is state-2;
Fig. 6 is when adopting Current cut control mode, a kind of control block diagram realizing the switch reluctance generator system of quick-response excitation/demagnetization of the present invention;
Fig. 7 is when adopting Angle-domain imaging mode, a kind of control block diagram realizing the switch reluctance generator system of quick-response excitation/demagnetization of the present invention;
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
Following examples for illustration of the present invention, but are not used for limiting the scope of application of the present invention.
A kind of switch reluctance generator system realizing encouraging fast/demagnetize that the present invention proposes, as shown in Figure 1, comprises switched reluctance machines body, prime mover, position transducer, power inverter, DC power supply and controller; Described switch reluctance generator is the energy converting between mechanical core of whole engine system, is electric energy by changes mechanical energy, and magnetic resistance minimum principle is followed in its operation; Described power inverter is the energy I/O channel of system, and described power inverter is four level power converters; Described position coder is for providing the positional information of rotor, described controller is the control axis of whole system, the feedback information of integrated treatment current sensor, voltage sensor and position coder, control the main switching device operating state in power inverter, realize the control to switch reluctance generator running status, described controller needs the rotor position information provided by position coder, in time the corresponding motor winding of turn-on and turn-off.
In the present invention, described motor is switched reluctance machines; In four described level power converters, adopt the transient current of current sensor to each phase winding of motor and DC bus end to detect, adopt the voltage of voltage sensor to DC bus end and storage capacitor to detect, realize voltage protection; The positional information of the pulse signal determination rotor of controller load position transducer; and with the voltage of the transient current of each phase winding of motor and storage capacitor for according to controlling motor; realize Current cut control; Angle ambiguity, the control strategy that PWM control and current/voltage protection etc. are relevant.
Four described level power converters as shown in Figure 4, comprising: each phase winding m of DC power supply, switch reluctance generator, filter capacitor C
dc, storage capacitor C
dc1, device for power switching Q1 and the device for power switching Q be in series with each phase winding
mH, Q
mL, power diode D1 and form the power diode D of continuous current circuit with each phase winding
m2, D
m3; Filter capacitor C
dcbe connected in parallel on DC bus end, and with storage capacitor C
dc1series connection.
As shown in Figure 4, the device for power switching Q in four described level power converters
mH, Q
mLdirectly be connected with each phase winding of switch reluctance generator; Device for power switching Q
mHfor the switching device of upper brachium pontis, device for power switching Q
mLfor the switching device of lower brachium pontis, the upper end of each winding of switch reluctance generator meets the device for power switching Q of corresponding upper brachium pontis respectively
mHemitter, the lower end of each winding of switch reluctance generator meets the device for power switching Q of corresponding lower brachium pontis respectively
mLcollector electrode, the device for power switching Q of upper brachium pontis
mHcollector electrode and storage capacitor C
dc1positive pole be connected, the device for power switching Q of lower brachium pontis
mLemitter connect the ground of DC power supply.
As shown in Figure 4, power diode D1, D in four described level power converters
m2and D
m3for the fly-wheel diode of each winding of switch reluctance generator; Every phase winding carries out afterflow with two power diodes respectively, power diode D
m2anode and power supply ground be connected, its negative electrode receives the device for power switching Q of the upper end of motor winding and the upper brachium pontis of this winding switching
mHemitter; Power diode D
m3anode and the device for power switching Q of the lower end of motor winding and the lower brachium pontis with this winding switching
mLcollector electrode be connected, the collector electrode of its negative electrode and device for power switching Q1 is connected with the anode of the power diode D1 shared; The negative electrode of the power diode D1 shared and storage capacitor C
dc1positive pole be connected.
As shown in Figure 4, it is use voltage fed or use two voltage feds that device for power switching Q1 determines switch reluctance generator winding two ends, the positive pole of its emitter and power supply and storage capacitor C
dc1negative pole be connected, collector electrode and power diode D
m3negative electrode be connected with the anode of power diode D1 shared.
In four level power converters, phase winding in the excitation stage by two voltage feds, the phase current rate of climb is accelerated, current curve slope increases, and when adopting Angle-domain imaging mode, magnetic field will increase in the energy storage in excitation stage, the initial current entering power generating stage will be increased, and generating voltage can dynamically be selected, so easily obtain desirable current waveform, the power output of system is increased; When adopting Current cut control mode, excitation time will reduce, and can realize quick-response excitation, the time of prolongation power generating stage, and the voltage of power generating stage also can Dynamic Selection, so the energy output of whole system and power output will be increased; At power generating stage, when employing two voltage sources time, the time used of demagnetizing will reduce, and can realize quick demagnetization.
Because power inverter conventional in prior art breaker in middle reluctance generator system is asymmetrical half-bridge power inverter, the magnitude of voltage at excitation stage phase winding two ends and the size of phase current proportional, exciting voltage is larger, the last exciting current of phase winding is larger, the energy that motor-field stores is more, more be conducive to generating, and when exciting voltage is larger, motor winding can realize quick-response excitation; And at power generating stage, if rotating speed is lower, generating voltage is greater than Based Motional Electromotive Force, phase current just can not continue to increase at power generating stage, generator system can not effectively generate electricity, so switch reluctance generator system will be made effectively to generate electricity, must ensure that generating voltage is less than Based Motional Electromotive Force.Because in asymmetrical half-bridge power inverter, the excitation stage is identical with the magnitude of voltage of power generating stage, independent regulation can not be carried out, be unfavorable for control and the effectively generating of switch reluctance generator, thus cause motor when rotating speed is lower, the power output of system is lower, does not reach the rated power of motor.For the deficiency of the switch reluctance generator system that existing asymmetrical half-bridge power inverter drives, a kind of switch reluctance generator system realizing quick-response excitation/demagnetization that the present invention proposes, for increasing the power output of generator system, under corresponding control strategy, make its power output reach the power-handling capability of motor, wherein power inverter adopts four novel level power converters, and its circuit topology as shown in Figure 4.In systems in which, exciting voltage and generating voltage can get different magnitudes of voltage, are convenient to regulating and controlling.Two voltage sources are adopted to power to motor winding in the excitation stage, thus realize quick-response excitation, increase the phase current rate of rise, and at power generating stage, use voltage source or two voltage sources are selected dynamically according to the size of the magnitude of voltage of storage capacitor, when use two voltage sources time, the motor demagnetization time can be reduced, realize demagnetizing fast
Four level power converters adopted in the present invention compared with asymmetrical half-bridge power inverter, many a device for power switching Q1, the storage capacitor C of a sustained diode 1 and a store electrical energy
dc1.This power inverter has four kinds of operating states, as shown in Figure 5, wherein: Fig. 5-1 is depicted as state 2, Fig. 5-2 is depicted as state 0, Fig. 5-3 is depicted as state-1, Fig. 5-4 is depicted as state-2.Now for A phase, it is analyzed, and is described in detail as follows:
As shown in fig. 5-1, state 2 turns off for device for power switching Q1, device for power switching Q
aH, Q
aLsituation when conducting simultaneously, now the voltage at winding two ends is V
dc+ V
dc1, namely two voltage sources are powered simultaneously, and this state is the unexistent operating state of asymmetrical half-bridge power inverter.When the excitation stage adopts state 2.Can quick-response excitation be realized, shorten the time of setting up required electric current, than the state 1 adopting asymmetrical half-bridge power inverter, larger phase current can be produced.
As shown in Fig. 5-2, state 0 is device for power switching Q
aH, Q
aLin any one be in conducting state, another is in off state, and situation time device for power switching Q1 is in shutoff, and now phase current carries out afterflow by fly-wheel diode, and phase winding is in freewheeling state, and the voltage at winding two ends is zero.
As shown in Fig. 5-3, state-1 is device for power switching Q1 conducting, device for power switching Q
aH, Q
aLall be in situation when shutoff, this state is traditional power generating stage, and now the voltage at winding two ends is negative supply voltage-V
dc, phase current forms feedback circuit by fly-wheel diode and DC power supply.
As shown in Fig. 5-4, state-2 is device for power switching Q1, Q
aH, Q
aLall be in situation when off state, now the voltage at winding two ends is-V
dc-V
dc1, this state is also power generating stage.Now switch reluctance generator is to storage capacitor C
dc1charge, capacitance voltage is constantly increased, until reach the desired value required for control.At power generating stage, adopt state-2, than the state-1 adopting asymmetrical half-bridge power inverter, can more promptly make phase current decay to 0, realize demagnetizing fast.
Known by analyzing, state-2 and state-1 can not occur simultaneously, and state 2 can occur with remaining various state simultaneously.
In switch reluctance generator system, adopt four level power converters in the present invention, realize encouraging fast/demagnetizing, increase the power output of system, its course of work is: first according to controlling object to storage capacitor C
dc1voltage value desired value, due to storage capacitor C
dc1be in continuous charge and discharge process, its magnitude of voltage should be the fluctuation up and down in desired value, namely there is a higher limit and lower limit.In the excitation stage, system adopts state 2 pairs of phase windings to carry out excitation always, realizes quick-response excitation; At power generating stage, then according to storage capacitor C
dc1the running status required for size selection of voltage, as storage capacitor C
dc1magnitude of voltage be less than desired value lower in limited time, using state-2, to storage capacitor C
dc1charge, make storage capacitor C
dc1voltage resume to normal range (NR), and realizes demagnetization fast; As storage capacitor C
dc1magnitude of voltage be greater than desired value upper in limited time, using state-1, due at excitation stage storage capacitor C
dc1excitation to be carried out to phase winding, have discharge process, so capacitance voltage will constantly decline, and then return to normal range (NR).As storage capacitor C
dc1magnitude of voltage when being between higher limit and lower limit, keep its original operating state constant.
When adopting Current cut control mode shown in Fig. 6, a kind of control block diagram realizing the switch reluctance generator system of quick-response excitation/demagnetization of the present invention.In the present embodiment, storage capacitor C is set
dc1the desired value of voltage and initial value are 100V, when its magnitude of voltage changes between 90V to 110V, regard it as normal range of operation.In the excitation stage, utilization state 2 pairs of phase windings carry out excitation, can realize quick-response excitation, make the current value that phase current reaches limited at short notice, shorten the excitation time of winding.When utilization state 2 pairs of windings carry out excitation, storage capacitor C
dc1to discharge, voltage will decline gradually; At power generating stage, according to storage capacitor C
dc1voltage swing dynamically selection mode-1 or state-2 control, as storage capacitor C
dc1magnitude of voltage lower than 90V time, select state-2 and state 0 pair of electric current to carry out chop control, storage capacitor C
dc1charge, its voltage will raise gradually, until 110V; As storage capacitor C
dc1voltage higher than 110V time, select state-1 and state 0 pair of electric current to carry out chop control, now storage capacitor C
dc1do not charged, and to phase winding excitation, discharge process will be had, storage capacitor C in the excitation stage
dc1voltage will decline gradually in this running, until 90V.Circulation like this repeatedly, storage capacitor C
dc1voltage will replace change between 90V to 110V, be namely in normal range of operation.As storage capacitor C
dc1voltage when normal range of operation, keep original operating state constant.
Operationally, storage capacitor C should be prevented
dc1there is overshoot phenomenon, avoid storage capacitor C
dc1overtension damage is caused to motor, setting storage capacitor C
dc1magnitude of voltage be overshoot more than during 120V.When capacitance voltage is too high, when being namely greater than 120V, the hard chopping way of state 2 and state-1 should be adopted at power generating stage, increase storage capacitor C
dc1electric discharge approach, make storage capacitor C
dc1magnitude of voltage rapidly drop to 110V, thus enable whole system keep normal operation, consider overshoot condition real be a kind of voltage protection strategy.
When adopting Angle-domain imaging mode shown in Fig. 7, a kind of control block diagram realizing the switch reluctance generator system of quick-response excitation/demagnetization of the present invention.In the present embodiment, storage capacitor C is set
dc1the desired value of voltage and initial value are 100V, when its magnitude of voltage changes between 90V to 110V, regard it as normal range of operation.In the excitation stage, utilization state 2 pairs of phase windings carry out excitation, and when the angle of flow is identical, the initial current that phase winding enters power generating stage will be increased, storage capacitor C
dc1voltage will decline gradually; At power generating stage, according to storage capacitor C
dc1voltage swing dynamically selection mode-1 or state-2 control, as storage capacitor C
dc1magnitude of voltage lower than 90V time, select state-2 pairs of electric currents to control, storage capacitor C
dc1charge, its voltage will raise gradually, until 110V; As storage capacitor C
dc1voltage higher than 110V time, select state-1 pair of electric current to carry out chop control, now storage capacitor C
dc1do not charged, and to phase winding excitation, discharge process will be had, storage capacitor C in the excitation stage
dc1voltage will decline gradually in this running, until 90V.Circulation like this repeatedly, storage capacitor C
dc1voltage will replace change between 90V to 110V, be namely in normal range of operation.As storage capacitor C
dc1voltage when normal range of operation, keep original operating state constant.
Analyze known phase current hangover the stage namely close the angle of rupture reduces to zero stage to electric current, the voltage at phase winding two ends is passive selections, determines, in time selecting state-2 by according to the state of adjacent phase, phase current can be made to reduce to zero rapidly, thus realize demagnetization fast.
Although invention has been described for composition graphs and specific embodiment above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; it should be pointed out that those skilled in the art are under enlightenment of the present invention, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (1)
1. realize a switch reluctance generator system for quick-response excitation/demagnetization, comprise switched reluctance machines body, prime mover, position transducer, power inverter, DC power supply and controller; It is characterized in that:
(1), described power inverter is four level power converters, comprises each phase winding m of DC power supply, switch reluctance generator, filter capacitor C
dc, storage capacitor C
dc1, device for power switching Q1 and the device for power switching Q be in series with each phase winding
mH, device for power switching Q
mL, power diode D1 and form the power diode D of continuous current circuit with each phase winding
m2, power diode D
m3; Filter capacitor C
dcbe connected in parallel on DC bus end, and with storage capacitor C
dc1series connection;
Device for power switching Q in four described level power converters
mHwith device for power switching Q
mLdirectly be connected with each phase winding of switch reluctance generator; Device for power switching Q
mHfor the device for power switching of upper brachium pontis, device for power switching Q
mLfor the device for power switching of lower brachium pontis, the upper end of each winding of switch reluctance generator meets the device for power switching Q of corresponding upper brachium pontis respectively
mHemitter, the lower end of each winding of switch reluctance generator meets the device for power switching Q of corresponding lower brachium pontis respectively
mLcollector electrode, the device for power switching Q of upper brachium pontis
mHcollector electrode and storage capacitor C
dc1positive pole be connected, the device for power switching Q of lower brachium pontis
mLemitter connect the ground of DC power supply; Power diode D1, D
m2and D
m3for the fly-wheel diode of each winding of switch reluctance generator, every phase winding carries out afterflow with two power diodes respectively, power diode D
m2anode and power supply ground be connected, its negative electrode receives the device for power switching Q of the upper end of motor winding and the upper brachium pontis of this winding switching
mHemitter; Power diode D
m3anode and the device for power switching Q of the lower end of motor winding and the lower brachium pontis with this winding switching
mLcollector electrode be connected, the collector electrode of its negative electrode and device for power switching Q1 is connected with the anode of the power diode D1 shared; Share negative electrode and the storage capacitor C of power diode D1
dc1positive pole be connected; The emitter of device for power switching Q1 and the positive pole of power supply and storage capacitor C
dc1negative pole be connected, its collector electrode and power diode D
m3negative electrode be connected with the anode of power diode D1 shared;
(2), in above-mentioned (1) four level power variators of carrying have state 2, state 0, state-1 and state-2 four kinds of mode of operations, and state 2 turns off for device for power switching Q1, device for power switching Q
aH, Q
aLsituation when conducting simultaneously; State 0 is device for power switching Q
aH, Q
aLin any one be in conducting state, another is in off state, and situation time device for power switching Q1 is in shutoff; State-1 is device for power switching Q1 conducting, device for power switching Q
aH, Q
aLall be in situation when shutoff; State-2 is device for power switching Q1, Q
aH, Q
aLall be in situation when off state; Wherein, state-2 and-1 can not occur simultaneously, and state 2 can occur with remaining various state simultaneously;
(3), described controller is current hysteresis-band control device, Angle-domain imaging device and voltage hysteresis controller, wherein current hysteresis-band control device and voltage hysteresis controller realize the switch reluctance generator system under Current cut control mode jointly, and Angle-domain imaging device and voltage hysteresis controller realize the switch reluctance generator system under Angle-domain imaging mode jointly;
Voltage hysteresis controller is used for stablizing storage capacitor C
dc1both end voltage V
dc1, in control procedure, have employed the cooperation control that four kinds of mode of operations of four level power converters are put forward by institute in (1) (2); Setting storage capacitor voltage V
dc1desired value, and set the change threshold that storage capacitor voltage allows; Under Current cut control mode, in the excitation stage, utilization state 2 pairs of phase windings carry out excitation, storage capacitor C
dc1to discharge, voltage will decline gradually; At power generating stage, according to storage capacitor C
dc1voltage swing dynamically selection mode-1 and state 0 pair of electric current carry out copped wave or state-2 and state 0 pair of electric current and carry out copped wave; Under Angle-domain imaging mode, in the excitation stage, utilization state 2 pairs of phase windings carry out excitation, and when the angle of flow is identical, the initial current that phase winding enters power generating stage will be increased, storage capacitor C
dc1voltage will decline gradually; At power generating stage, according to storage capacitor C
dc1voltage swing dynamically selection mode-1 or state-2 control; Namely the phase current hangover stage closes the angle of rupture reduces to zero stage to electric current, the voltage at phase winding two ends and the operating state of power inverter, according to the Determines of adjacent phase, are passive selections, in time selecting state-2, phase current can be made to reduce to zero rapidly, thus realize demagnetization fast.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310351840.8A CN103475292B (en) | 2013-08-13 | 2013-08-13 | A kind of switch reluctance generator system realizing quick-response excitation/demagnetization |
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| CN201310351840.8A CN103475292B (en) | 2013-08-13 | 2013-08-13 | A kind of switch reluctance generator system realizing quick-response excitation/demagnetization |
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| CN103475292A CN103475292A (en) | 2013-12-25 |
| CN103475292B true CN103475292B (en) | 2016-04-06 |
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