CN109713957B - Double-channel alternating current-direct current hybrid power supply starting power generation system - Google Patents
Double-channel alternating current-direct current hybrid power supply starting power generation system Download PDFInfo
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Abstract
The embodiment of the invention discloses a dual-channel alternating current-direct current hybrid power supply starting power generation system, which relates to the technical field of motor control. Specifically, a permanent magnet synchronous motor in a parallel hybrid excitation motor is provided with three sets of windings, an electric excitation double-salient-pole motor is provided with two sets of windings, the permanent magnet synchronous motor is used as a direct current power generation end, a parallel hybrid excitation alternating current power generation end and an excitation source, the excitation source is introduced into an independent exciter, a main power supply only has the problem of one power supply system, and a dual-channel alternating current and direct current hybrid power supply starter generator and a starter generator controller are integrated in a motor shell. The invention is suitable for starting control of the brushless motor.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a dual-channel alternating current and direct current hybrid power supply starting power generation system.
Background
The brushless direct current starting power generation technology is an important basis for improving the electrification degree of the airplane and realizing the target of a multi-electric/full-electric airplane. At present, both an alternating current network and a direct current network exist on most airplanes. The dual-channel alternating current and direct current hybrid power supply of the main power supply is realized in the starter generator, so that the structure of an on-board power supply system is simplified, the reliability of the system is improved, and different load requirements can be met.
In the similar scheme at present, a permanent magnet and variable reluctance parallel hybrid excitation brushless motor exists, the motor is a permanent magnet synchronous motor and a reluctance motor which are coaxially connected, the permanent magnet synchronous motor and the reluctance motor share one set of armature winding and can only realize the output of a single power system when used as a generator, and the reluctance motor part needs an external excitation source to provide excitation for the motor. In the similar scheme at present, there is also a double salient pole high voltage dc starting power generation scheme, where the starting generator includes a two-section type electric excitation double salient pole motor and a permanent magnet exciter which are coaxially connected, the permanent magnet exciter provides an excitation current for an excitation winding, and the electric excitation motor is used as a generator, and this scheme has a problem of low power density of the system, and there is a considerable distance in practical application.
Therefore, how to provide higher power density and operation efficiency compared with the current scheme of the electrically excited motor under the condition of ensuring simple system structure and simple control mode becomes a further research and development direction.
Disclosure of Invention
The embodiment of the invention provides a dual-channel alternating current and direct current hybrid power supply starting power generation system, starting control can be realized by using a traditional power converter in the starting stage of a motor, the technology is mature, the control is simple, and the power density and the efficiency are higher compared with those of a traditional electrically excited motor.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the double-channel alternating current and direct current hybrid power supply starting power generation system in the embodiment comprises a parallel hybrid excitation motor and a starting generator controller. The parallel hybrid excitation motor comprises an electro-magnetic doubly salient motor and a permanent magnet synchronous motor, wherein rotors of the electro-magnetic doubly salient motor are coaxially connected, the electro-magnetic doubly salient motor is provided with a set of armature windings and a set of excitation windings, and the permanent magnet synchronous motor is provided with three sets of armature windings. The output end of a first armature winding of the permanent magnet synchronous motor is connected with the alternating current end of the full-power converter, and the direct current end of the full-power converter is used as the starting input end and the direct current generating output end of the starting generating system; the output end of an armature winding of the electro-magnetic doubly salient motor is connected with the input end of a second armature winding of the permanent magnet synchronous motor in series and then is connected with an alternating current relay to serve as the alternating current power generation output end of a starting power generation system; and the output end of the third armature winding of the permanent magnet synchronous motor is connected with the rectifying and filtering unit and the excitation power circuit and is used as an excitation source of the electric excitation double-salient-pole motor.
Because the permanent magnet synchronous motor in the parallel hybrid excitation motor has three sets of windings, the electric excitation double salient pole motor has two sets of windings, the permanent magnet synchronous motor is used as a direct current power generation end, a parallel hybrid excitation alternating current power generation end and an excitation source, the problems that the power density of the electric excitation double salient pole motor is low, the excitation source is introduced into an independent exciter, and a main power supply only has one power supply system are solved.
And because of the existence of the permanent magnet synchronous motor, the starting control can be realized by using the traditional power converter in the starting stage, the technology is mature, and the control is simple. And the system structure and control are simple, and compared with the traditional electrically excited motor, the power density and efficiency are higher.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a structural diagram of a dual-channel AC/DC hybrid power supply starting power generation system of the present invention;
FIG. 2 is a schematic cross-sectional view of a dual-channel AC/DC hybrid power supply starting power generation system;
FIG. 3 is a schematic structural diagram of a parallel hybrid excitation motor;
FIG. 4 is a schematic structural diagram of an electrically excited doubly salient motor;
FIG. 5 is a schematic structural diagram of a permanent magnet synchronous motor;
FIG. 6 is a structural diagram of a full power converter of the dual-channel AC/DC hybrid power supply starting power generation system;
FIG. 7 is a structural diagram of a rectification filter unit of a dual-channel AC/DC hybrid power supply starting power generation system;
FIG. 8 is a diagram of an excitation power circuit of a dual-channel AC/DC hybrid power supply starting power generation system;
FIG. 9 is a starting control block diagram of the dual-channel AC/DC hybrid power supply starting power generation system;
FIG. 10 is a power generation control block diagram of a dual-channel AC/DC hybrid power supply starting power generation system;
FIG. 11 is a flow chart of a starting power generation control method of a double salient pole high voltage DC starting power generation system;
description of the various reference symbols in the drawings:
the permanent magnet synchronous motor comprises a rotating shaft (1), an excitation winding (2) of an electrically excited doubly salient motor, an armature winding (3) of the electrically excited doubly salient motor, a third armature winding (4) of the permanent magnet synchronous motor, a first armature winding (5) of the permanent magnet synchronous motor, a second armature winding (6) of the permanent magnet synchronous motor and a permanent magnet (7);
a rotor (8-1) of an electro-magnetic doubly salient motor and a rotor (8-2) of a permanent magnet synchronous motor;
a stator (9-1) of an electro-magnetic doubly salient motor and a stator (9-2) of a permanent magnet synchronous motor;
the system comprises an alternating current contactor (10), a full-power converter (11), a direct current contactor (12), a starting power generation control unit (13) and a starting contactor (14);
a front end cover (15-1), a middle end plate (15-2) and a rear end cover (15-3);
a housing (16), a bearing (17), an outlet groove (18), a notch region (19), a groove middle region (20), and a groove bottom region (21).
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the invention provides a dual-channel alternating current and direct current hybrid power supply starting power generation system, as shown in fig. 1 and 2, comprising:
the system consists of a parallel hybrid excitation motor and a starter generator controller.
The parallel hybrid excitation motor includes: the permanent magnet synchronous motor and the electric excitation double salient pole motor are coaxially connected with a rotor of the transmitter.
The starter generator controller includes: full power converter 11, rectification filter unit, excitation power circuit, detector group and starting power generation control unit 13.
The detector group is configured to detect an ac-side current of the full-power converter 11, an output current of the dc power generation output terminal of the system, an output voltage of the dc power generation output terminal of the system, an output current of the ac power generation output terminal of the system, an output voltage of the ac power generation output terminal of the system, a current of the excitation winding 2 of the doubly salient electro-magnetic motor, and a rotor position of the starter generator, and transmit detected data to the start power generation control unit 13. The starting power generation control unit 13 is connected with a second external power supply, and the starting power generation control unit 13 performs data interaction with external equipment through an external data bus.
Wherein the detector set includes sensors disposed in the system: the system comprises an alternating current end current sensor of a full power converter (11), a direct current generation output end current sensor of the system, a direct current generation output end voltage sensor of the system, an alternating current generation output end current sensor of the system, an alternating current generation output end voltage sensor of the system, a current sensor of an electro-magnetic doubly salient motor excitation winding (2) and a rotor position sensor of a starting generator.
The starting and power generation control unit (13) comprises a rectifying and filtering unit and an excitation power circuit.
As shown in fig. 3 to 5, the stator 9-2 of the permanent magnet synchronous motor is provided with three sets of armature windings, which includes: the permanent magnet synchronous motor comprises a permanent magnet synchronous motor first armature winding 5, a permanent magnet synchronous motor second armature winding 6 and a permanent magnet synchronous motor third armature winding 4.
Two sets of windings are arranged on a stator 9-1 of the electro-magnetic doubly salient motor, and the two sets of windings comprise: an electro-magnetic doubly salient motor armature winding 3 and an electro-magnetic doubly salient motor excitation winding 2.
Therefore, the dual-channel alternating current and direct current power supply system is integrated in the same starting power generation system, the starting power converter is multiplexed, the structure is simple, and the system power density is high.
In the present embodiment, the input end of the first armature winding 5 of the permanent magnet synchronous motor is connected in star connection, the output end of the first armature winding 5 of the permanent magnet synchronous motor is connected with the ac end of the full-power converter 11, and the dc positive end of the full-power converter 11 is connected with the first contact of the starting contactor 14 (for example, K in fig. 1)1I.e., as a starting contactor 14), the second contact of the starting contactor 14 constituting the positive starting input terminal of the dual channel ac/dc hybrid power supply starting power generation system, wherein the first and second contacts of the starting contactor (14) are understood to be the starting contactor K in fig. 11The left and right sides are respectively marked by hollow dots with numbers 1, 2. It should be noted that the star connection method refers to a connection method of a three-phase ac power supply and a three-phase electrical appliance, and belongs to the knowledge of common knowledge in the field. The input ends of the electric armature windings 3 of the electro-magnetic doubly salient motor are connected in a star connection mode, and the electric armature of the electro-magnetic doubly salient motorThe output end of the winding 3 is connected with the input end of a second armature winding 6 of the permanent magnet synchronous motor, the output end of the second armature winding 6 of the permanent magnet synchronous motor is connected with a first contact of an alternating current contactor 10, and a second contact of the alternating current contactor 10 forms the alternating current power generation output end of the system.
The input end of a third armature winding 4 of the permanent magnet synchronous motor is connected in a star connection mode, the output end of the third armature winding 4 of the permanent magnet synchronous motor is connected with a first contact of the excitation relay, a second contact of the excitation relay is connected with the input end of the rectification filter unit, the output end of the rectification filter unit is connected with the input end of the excitation power circuit, and the output end of the excitation power circuit is connected with two ends of an excitation winding 2 of the electrically excited doubly salient motor. The first and second contacts of the exciter relay can be understood as the starting contactor K in fig. 14Hollow dots marked on the left and right sides by numerals 1 and 2 respectively
For example, the parallel hybrid excitation motor shown in fig. 1 comprises a permanent magnet synchronous motor part and an electrically excited doubly salient motor part, wherein rotors of the permanent magnet synchronous motor part and the electrically excited doubly salient motor part are coaxially connected. Three sets of armature windings are arranged on a partial stator of the permanent magnet synchronous motor, namely a first armature winding W of the permanent magnet synchronous motora1Second armature winding W of permanent magnet synchronous motora2And a third armature winding W of the permanent magnet synchronous motora3. Two sets of windings are arranged on a partial stator of the electro-magnetic doubly salient motor, namely an electro-magnetic doubly salient motor armature winding WaAnd an electro-magnetic doubly salient motor excitation winding Wf. The starting generator controller comprises a full-power converter, a rectifying and filtering unit, an excitation power circuit, a detector group and a starting generation control unit.
First armature winding W of permanent magnet synchronous motora1One end of the permanent magnet synchronous motor is connected by star connection, and a first armature winding W of the permanent magnet synchronous motora1The output end is respectively connected with the alternating current end of the full-power converter, and the direct current positive end of the full-power converter is connected with the starting contactor K 11 st contact connection of, starting contactor K1The 2 nd contact of the double-channel alternating current and direct current hybrid power supply starting power generation system forms a starting input positive terminal, and the power is fullConverter direct current negative terminal constitutes the binary channels alternating current-direct current hybrid power supply starts power generation system's input negative terminal that starts, binary channels alternating current-direct current hybrid power supply start power generation system start the input positive terminal with binary channels alternating current-direct current hybrid power supply starts power generation system's the input negative terminal that starts constitutes binary channels alternating current-direct current hybrid power supply starts power generation system's the input that starts, binary channels alternating current-direct current hybrid power supply starts power generation system's the input that starts and is connected with power 1.
Direct-current positive end of full-power converter and direct-current contactor K 21 st contact connection, dc contactor K2The 2 nd contact constitute the positive end of binary channels alternating current-direct current hybrid power supply starts the direct current power generation output of power generation system, full power converter direct current negative terminal constitutes the binary channels alternating current-direct current hybrid power supply starts the direct current power generation output negative terminal of power generation system, the binary channels alternating current-direct current hybrid power supply start the direct current power generation output positive terminal of power generation system with the binary channels alternating current-direct current hybrid power supply starts the direct current power generation output negative terminal of power generation system and constitutes the binary channels alternating current-direct current hybrid power supply starts the direct current power generation output negative terminal of power generation system. The first and second contacts of the dc contactor can be understood as ac contactor K in fig. 14The left and right sides are respectively marked by hollow dots with numbers 1, 2.
Electro-magnetic doubly salient motor armature winding WaIs connected in star connection, and electrically excites the armature winding W of the doubly salient motoraThe output ends of the permanent magnet synchronous motors are respectively connected with a second armature winding W of the permanent magnet synchronous motora2Input end connected, second armature winding W of permanent magnet synchronous motora2The output terminals are respectively connected with an AC contactor K 31 st contact connection of, ac contactor K3The 2 nd contact of the double-channel alternating current and direct current hybrid power supply starting power generation system forms an alternating current power generation output end, wherein the first contact and the second contact of the alternating current contactor can be understood as an alternating current contactor K in figure 13The left and right sides are respectively marked by hollow dots with numbers 1, 2.
Third armature winding W of permanent magnet synchronous motora3One end of the permanent magnet synchronous motor is connected by adopting a star connection method, and a third armature winding W of the permanent magnet synchronous motora3The output ends are respectively connected with an excitation relay K 41 st contact connection of, excitation relay K4The 2 nd contact of the transformer is respectively connected with the input end of a rectifying and filtering unit, the output end of the rectifying and filtering unit is respectively connected with the input end of an excitation power circuit, and the output end of the excitation power circuit is respectively connected with an excitation winding W of an electro-magnetic doubly salient motorfTwo ends are connected.
The detector group is used for detecting the current i at the alternating current end of the full-power converteras,icsThe DC power generation output end of the dual-channel AC/DC hybrid power supply starting power generation system outputs current IdcAnd the DC power generation output end of the double-channel AC/DC hybrid power supply starting power generation system outputs voltage UdcAnd the AC power generation output end of the double-channel AC/DC hybrid power supply starting power generation system outputs current ia,icAnd the AC power generation output end of the double-channel AC/DC hybrid power supply starting power generation system outputs voltage ua,ucExcitation winding W of electro-magnetic doubly salient motorfCurrent IfAnd a starter generator rotor position theta is detected and transmitted to a starting power generation control unit. The starting power generation control unit is connected to the power supply 2, and communicates with an external data bus.
The permanent magnet synchronous motor in the embodiment has the excitation source winding besides the alternating current and direct current main power windings, can be used as an excitation source, and has the advantages of mutual independence between the windings, compact structure and flexible adjustment.
In the present embodiment, the dc negative terminal of the full power converter 11 serves as the start input negative terminal of the system, the start input positive terminal of the system and the start input negative terminal of the system serve as the start input terminal of the system, and the start input terminal of the system is connected to the first external power supply.
The direct current positive end of the full-power converter 11 is connected with the first contact of the direct current contactor 12, the second contact of the direct current contactor 12 is used as the direct current power generation output positive end of the system, the direct current negative end of the full-power converter 11 is used as the direct current power generation output negative end of the system, and the direct current power generation output positive end of the system and the direct current power generation output negative end of the system form the direct current power generation output negative end of the system.
Such as shown in fig. 2. The parallel hybrid excitation motor and the starting generator controller are arranged in the same shell, and the parallel hybrid excitation motor is separated from the alternating current contactor 10, the full-power converter 11, the direct current contactor 12, the starting power generation control unit, the rectifying and filtering unit and the excitation power circuit 13 by a middle end plate 15-2. The side-by-side hybrid excitation motor is located in a space between the front end cover 15-1 and the middle end plate 15-2 in the housing 16. The third armature winding 4 of the permanent magnet synchronous motor is connected with the input end of a rectifying and filtering unit on the rear end cover 15-3, three wire outlet grooves 18 are uniformly distributed on the excircle of the stator 9-2 of the permanent magnet synchronous motor, and the output end of the armature winding 3 of the electro-magnetic doubly salient motor respectively penetrates through the wire outlet grooves 18 and is connected with the output end of an excitation power circuit on the rear end cover 15-3. The full-power converter comprises an alternating current contactor 10, a direct current contactor 12, a space located between a middle end plate 15-2 and a rear end cover 15-3 in a shell 16, a full-power converter 11 is arranged on the middle end plate, and a starting power generation control unit, a rectifying and filtering unit and an excitation power circuit 13 are arranged on the rear end cover.
By integrating the parallel hybrid excitation motor and the starter generator controller in the same shell, the full-power converter 11 utilizes the motor shell 16 and the end cover to dissipate heat, thereby saving an independent radiator and improving the power density of the system. For example, fig. 6 is a structural diagram of a full power converter of a dual-channel ac/dc hybrid power supply starting power generation system. The starting circuit comprises six power switching tubes including T1, T2, T3, T4, T5 and T6, six diodes including D1, D2, D3, D4, D5 and D6, a capacitor C1, and a starting control unit for outputting a control signal PWMT1～T6And controlling the switching tubes T1-T6 of the full-power converter to chop.
Fig. 7 is a structural diagram of a rectifying and filtering unit of the dual-channel alternating current-direct current hybrid power supply starting power generation system. The LED comprises six diodes including D7, D8, D9, D10, D11 and D12, and a capacitor C2.
In addition, excitation is not required to be controlled in the starting stage, starting control can be achieved only by using the traditional full-power converter 11, control is simple, and system reliability is improved.
In this embodiment, three slots are uniformly distributed in the outer circle region of the stator 9-2 of the permanent magnet synchronous motor. The excitation winding 2 of the electric excitation double-salient pole motor is led out from the three grooves and is connected with the output end of the excitation power circuit, wherein the excitation winding of the double-salient pole motor needs to be connected with the output end of the excitation power circuit, so that lead-out wires are needed to be led out to the excitation power circuit.
Specifically, each stator slot of the permanent magnet synchronous motor in the parallel hybrid excitation motor is divided into a slot opening area 19, a middle slot area 20 and a slot bottom area 21. The first armature winding 5 of the permanent magnet synchronous motor is wound in the notch area 19 of each stator slot, the second armature winding 6 of the permanent magnet synchronous motor is wound in the middle slot area 20 of each stator slot, and the third armature winding 4 of the permanent magnet synchronous motor is wound in the slot bottom area 21 of each stator slot. For example: fig. 3 is a structural schematic diagram of a parallel hybrid excitation motor. The parallel hybrid excitation motor electro-magnetic doubly salient motor part rotor 8-1 is connected with the rotating shaft 1, and the permanent magnet synchronous motor part rotor 8-2 is connected with the rotating shaft 1. Fig. 4 is a schematic structural diagram of an electrically excited doubly salient motor. And fig. 5 is a schematic structural view of the permanent magnet synchronous motor. In which the notch region 19 houses the third armature winding W of the PMSMa3The first armature winding W of the permanent magnet synchronous motor is placed in the area 20 in the groovea1A second armature winding W of the permanent magnet synchronous motor is arranged in the groove bottom area 21a2。
Fig. 8 is a structure diagram of an excitation power circuit of a dual-channel ac/dc hybrid power supply starting power generation system. The power generation control circuit comprises four power switching tubes including T7, T8, T9 and T10, four diodes including D13, D14, D15 and D16, a capacitor C2, and a power generation control unit for outputting a control signal PWMT7～T10And controlling the chopping of the switch tubes T7-T10 of the excitation power circuit.
In a preferred aspect of this embodiment, the permanent magnet synchronous motor is a rotor permanent magnet synchronous motor. And the number of pole pairs of the permanent magnet synchronous motor is consistent with that of the rotor of the electro-magnetic doubly salient motor. The term "identical" means that the number of pole pairs of the permanent magnet synchronous motor is equal to the number of pole pairs of the rotor of the electrically excited doubly salient motor.
Based on the dual-channel alternating current-direct current hybrid power supply starting power generation system in the embodiment, a control method for the system is further provided, and the control method comprises the following steps:
after the dual-channel alternating current and direct current hybrid power supply starting and generating system receives a starting signal, a self-checking program is executed, after the self-checking is completed, the starting and generating control unit 13 outputs a switch control signal, the starting contactor 14 is closed, the starting generator controller carries out starting control to drive the engine to start, whether the rotating speed of the engine reaches a preset disengaging rotating speed or not is judged by detecting the feedback state quantity, if the rotating speed does not reach the preset disengaging rotating speed, the starting contactor 14 is disconnected, the starting program is stopped, after a preset waiting time, the dual-channel alternating current and direct current hybrid power supply starting and generating system receives the starting signal again, if the rotating speed reaches the disengaging rotating speed, a starting completion signal transmitted by a data bus connected with the starting/generating controller is received, if the starting completion signal is not received, the starting failure is indicated, the, and simultaneously stopping the starting procedure, receiving the starting signal again by the dual-channel alternating current and direct current hybrid power supply starting power generation system after the preset waiting time, if the starting completion signal is received, indicating that the starting is successful, disconnecting the starting contactor 14, and stopping the starting program, judging whether the rotating speed of the starting generator reaches the preset generating operation rotating speed or not by detecting the feedback state quantity, waiting for the rotating speed of the engine to continuously increase to the generating operation rotating speed if the rotating speed of the starting generator does not reach the generating operation rotating speed, waiting for receiving a loadable signal transmitted by a data bus connected with a controller of the starting generator if the rotating speed of the engine reaches the generating operation rotating speed, when the loadable signal is received, the power generation control unit outputs a switch control signal, closes the direct current contactor 12, the alternating current contactor 10 and the excitation relay, starts the generator controller to perform power generation control, and provides electric energy for the direct current load and the alternating current load.
The starting control is that the voltage signal of the third armature winding 4 of the permanent magnet synchronous motor is detected, the position signal and the rotating speed signal of the starter generator and the rotor of the engine are obtained through a non-position algorithm, the rotating speed signal of the starter generator is compared with the rotating speed given signal of the starter generator, the phase current given signal is obtained after P I adjusting links, the current signal of the alternating current end of the full-power converter 11 is obtained through a phase current adjusting link, the phase current adjusting signal is obtained after comparing the phase current adjusting signal with the phase current given signal, a phase current chopping control signal is generated through a PI adjusting link, the phase current control angle is generated by simultaneously passing the rotating speed signal of the starter generator and the engine, the rotor position signal of the starter generator and the direct current end voltage signal of the full-power converter 11 through a phase current control angle selecting link, the phase current control angle and the phase current chopping control signal are subjected to a phase current chopping phase-changing control algorithm together to generate a chopping control signal of a switching tube of the full-power converter 11, and the switching tube of the full-power converter 11 is controlled to chop, so that the phase current is controlled, the output torque and the starting rotating speed of the starter generator are controlled, and the engine is driven to start.
For example, fig. 9 is a start control block diagram of a dual-channel ac/dc hybrid power supply start power generation system. Detecting the obtained voltage signal u of the third armature winding of the permanent magnet synchronous motor3Obtaining a position signal and a rotating speed signal n of a rotor of the starter generator and the engine through a position-free algorithm, and obtaining a rotating speed signal n of the starter generator and a rotating speed given signal n of the starter generatorrefAfter comparison, a phase current given signal i is obtained after a PI regulation linkphrefDetecting the obtained AC end current signal i of the full-power converteras,icsObtaining a phase current conditioning signal i through a phase current conditioning linkphPhase current conditioning signal iphPhase current given signal iphrefAfter comparison, through PI regulation link, phase current chopping control signal PWM is generatediStarting generator and engine rotating speed signal n, starting generator rotor position signal and detected full power converter direct current end voltage signal usMeanwhile, through a phase current control angle selection link, a phase current control angle and a phase current chopping control signal PWM are generatediGenerating the chopping control signal PWM of the switching tube of the full-power converter through a phase current chopping commutation control algorithmT1～T6Controlling the chopping of the switching tube of the full-power converter, thereby controlling the phase current ias,icsSize, control starter generator output torque and startingAnd the engine is driven to start at the dynamic rotation speed n.
The power generation control is that the detected output voltage signal of the alternating current power generation output end is subjected to a voltage conditioning link to obtain a voltage conditioning signal of the alternating current power generation output end, the voltage conditioning signal is compared with a given output voltage signal of the alternating current power generation output end, an exciting winding current given signal is generated through a PI (proportional integral) conditioning link, the detected exciting winding current signal is compared with the given exciting winding current signal, a pulse width modulation signal controlled by chopping of an exciting power circuit switching tube is generated through the PI conditioning link and a chopping commutation control link, the switching state of the exciting power circuit switching tube is controlled, and therefore the alternating current output voltage of the dual-channel alternating current and direct current hybrid power supply starting power generation system is controlled. After the detected output voltage signal of the direct current power generation output end is compared with the given output voltage signal of the direct current power generation output end, a pulse width modulation signal controlled by the chopper of the switching tube of the full-power converter 11 is generated through a PI (proportion integration) adjusting link and a chopper commutation control link, and the switching state of the switching tube of the full-power converter 11 is controlled, so that the direct current output voltage of the dual-channel alternating current-direct current hybrid power supply starting power generation system is controlled.
For example, fig. 10 is a power generation control block diagram of a dual-channel ac/dc hybrid power supply starting power generation system. Detected output voltage signal u of alternating current power generation output enda,ucObtaining a voltage conditioning signal u at the output end of the alternating current power generation through a voltage conditioning linkphAnd output voltage given signal u of AC power generation output terminalphrefAfter comparison, an excitation winding current given signal i is generated through a PI regulation linkfrefDetecting the obtained excitation winding current signal ifWith excitation winding current given signal ifrefAfter comparison, through a PI regulation link and a chopping commutation control link, a pulse width modulation signal PWM controlled by chopping of a switching tube of the excitation power circuit is generatedT7～T10And the switch state of a switch tube of an excitation power circuit is controlled, so that the alternating current output voltage u of the dual-channel alternating current-direct current hybrid power supply starting power generation system is controlleda,uc. Detected output voltage signal U of direct current power generation output enddcAnd output with the output end of the DC power generationVoltage given signal UdcrefAfter comparison, through a PI regulation link and a chopping commutation control link, generating a Pulse Width Modulation (PWM) signal for chopping control of a switching tube of the full-power converterT1～T6And the switching state of a switching tube of the full-power converter is controlled, so that the direct-current output voltage U of the dual-channel alternating-current and direct-current hybrid power supply starting power generation system is controlleddc。
For example, fig. 11 is a flowchart of a start power generation control method of a double salient pole high-voltage dc start power generation system. After the double-channel alternating current-direct current hybrid power supply starting power generation system receives a starting signal, a self-checking program is executed, and after the self-checking is completed, the starting power generation control unit outputs a switch control signal SK1Closing the starting contactor K1Starting the generator controller to control the starting and drive the engine to start, and judging whether the rotating speed of the engine reaches the preset disengagement rotating speed v or not by detecting the feedback state quantity1If the preset disengagement speed v is not reached1Indicating failed start, starting contactor K1Disconnecting, simultaneously stopping the starting procedure, and then passing through a preset waiting time t1The double-channel AC/DC hybrid power supply starting power generation system receives the starting signal again, and if the starting signal reaches the disengagement rotating speed v1Waiting for receiving a starting completion signal transmitted by a data bus connected with a starting generator controller, if the starting completion signal is not received, indicating that the starting is failed, and starting a contactor K1Disconnecting, simultaneously stopping the starting procedure, and then passing through a preset waiting time t1The double-channel alternating current and direct current hybrid power supply starting power generation system receives the starting signal again, if the starting completion signal is received, the starting is successful, and the starting contactor K is started1Cutting off, stopping the starting program, and judging whether the rotating speed of the starting generator reaches the preset generating operation rotating speed v or not by detecting the feedback state quantity2If the rotational speed v of the generator is not reached2Waiting for the engine speed to continue to rise to the generating operation speed v2If the rotating speed reaches the generating operation rotating speed v2Waiting for receiving a loadable signal transmitted by a data bus connected to the starter generator controller, and outputting a switch control signal S by the generator control unit after receiving the loadable signalK2,SK3,SK4Closing DC contactor K2AC contactor K3Excitation relay K4And starting the generator controller to perform power generation control and provide electric energy for the direct current load and the alternating current load.
Therefore, the embodiment realizes that the starting control can be realized only by using the traditional full-power converter 11 without controlling the excitation in the starting stage, the control is simple, and the system reliability is high.
The embodiment provides a double-channel alternating current and direct current hybrid power supply starting power generation system. The permanent magnet synchronous motor in the parallel hybrid excitation motor is provided with three sets of windings, the electric excitation double salient pole motor is provided with two sets of windings, the permanent magnet synchronous motor is used as a direct current power generation end, a parallel hybrid excitation alternating current power generation end and an excitation source, the problems that the power density of the electric excitation double salient pole motor is low, an independent excitation source is introduced, and a main power supply is only provided with one power supply system are solved, and the dual-channel alternating current and direct current hybrid power supply starter generator and the starter generator controller are integrated in one motor shell 16, so that the integrated starting power generation system with high power density, compact structure and simple control is provided.
The hybrid excitation motor organically combines a permanent magnet synchronous motor and an electric excitation motor: due to the existence of the permanent magnet synchronous motor, the starting control can be realized by using the traditional power converter in the starting stage, the technology is mature, and the control is simple; the starting power converter can be used as a power generation controller in a power generation stage, and a control system outputs direct current to realize component multiplexing; due to the existence of the electric excitation motor, alternating current output voltage regulation can be realized only by regulating direct current excitation current. The system structure and control are simple, and compared with the traditional electrically excited motor, the power density and efficiency are higher.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A dual-channel alternating current-direct current hybrid power supply starting power generation system is characterized by comprising a parallel hybrid excitation motor and a starter generator controller;
the parallel hybrid excitation motor includes:
the permanent magnet synchronous motor and the electric excitation double salient pole motor are coaxially connected with a rotor of the starting generator;
the starter generator controller includes:
a full power converter (11), a detector group and a starting power generation control unit (13); the detector group is used for detecting alternating-current end current of a full-power converter (11), output current of a direct-current power generation output end of the system, output voltage of a direct-current power generation output end of the system, output current of an alternating-current power generation output end of the system, output voltage of an alternating-current power generation output end of the system, current of an excitation winding (2) of an electro-excitation double-salient motor and a rotor position of a starter generator, and transmitting detected data to a starting power generation control unit (13); the starting power generation control unit (13) is connected with a second external power supply, and the starting power generation control unit (13) performs data interaction with external equipment through an external data bus;
three sets of armature windings are arranged on a stator (9-2) of the permanent magnet synchronous motor, and the permanent magnet synchronous motor comprises: the permanent magnet synchronous motor comprises a first armature winding (5) of the permanent magnet synchronous motor, a second armature winding (6) of the permanent magnet synchronous motor and a third armature winding (4) of the permanent magnet synchronous motor;
two sets of windings are arranged on a stator (9-1) of the electric excitation doubly salient motor, and the electric excitation doubly salient motor comprises the following components: an electric excitation doubly salient motor armature winding (3) and an electric excitation doubly salient motor excitation winding (2);
the input end of a first armature winding (5) of the permanent magnet synchronous motor is connected in a star connection mode, the output end of the first armature winding (5) of the permanent magnet synchronous motor is connected with the alternating current end of a full-power converter (11), the direct current positive end of the full-power converter (11) is connected with a first contact of a starting contactor (14), and a second contact of the starting contactor (14) forms the starting input positive end of the system;
the input ends of the electric excitation double-salient motor armature winding (3) are connected in a star connection mode, the output end of the electric excitation double-salient motor armature winding (3) is connected with the input end of a second armature winding (6) of the permanent magnet synchronous motor, the output end of the second armature winding (6) of the permanent magnet synchronous motor is connected with a first contact of an alternating current contactor (10), and a second contact of the alternating current contactor (10) forms the alternating current power generation output end of the system;
the input end of a third armature winding (4) of the permanent magnet synchronous motor is connected in a star connection mode, the output end of the third armature winding (4) of the permanent magnet synchronous motor is connected with a first contact of an excitation relay, a second contact of the excitation relay is connected with the input end of a rectification filter unit, the output end of the rectification filter unit is connected with the input end of an excitation power circuit, and the output end of the excitation power circuit is connected with two ends of an excitation winding (2) of an electrically excited doubly salient motor;
the direct current negative end of the full-power converter (11) is used as the starting input negative end of the system, the starting input positive end of the system and the starting input negative end of the system are used as the starting input ends of the system, and the starting input ends of the system are connected with a first external power supply;
the direct-current positive end of the full-power converter (11) is connected with the first contact of the direct-current contactor (12), the second contact of the direct-current contactor (12) is used as the direct-current power generation output positive end of the system, the direct-current negative end of the full-power converter (11) is used as the direct-current power generation output negative end of the system, and the direct-current power generation output positive end of the system and the direct-current power generation output negative end of the system form the direct-current power generation output end of the system;
three stator slots are uniformly distributed in the outer circle region of a stator (9-2) of the permanent magnet synchronous motor;
an excitation winding (2) of the electrically excited doubly salient motor is led out from the three stator slots;
each stator slot of the permanent magnet synchronous motor in the parallel hybrid excitation motor is divided into a slot opening area (19), a slot middle area (20) and a slot bottom area (21);
a first armature winding (5) of the permanent magnet synchronous motor is wound in a notch area (19) of each stator slot, a second armature winding (6) of the permanent magnet synchronous motor is wound in a slot middle area (20) of each stator slot, and a third armature winding (4) of the permanent magnet synchronous motor is wound in a slot bottom area (21) of each stator slot;
the permanent magnet synchronous motor is a rotor permanent magnet synchronous motor;
the number of pole pairs of the permanent magnet synchronous motor is consistent with that of the rotor of the electro-magnetic doubly salient motor;
the parallel hybrid excitation motor and the starting generator controller are arranged in a shell of the same shell (16), and the parallel hybrid excitation motor is separated from the alternating current contactor (10), the full-power converter (11), the direct current contactor (12), the excitation power circuit, the rectification filter unit and the starting generation control unit (13) by a middle end plate (15-2);
the parallel hybrid excitation motor is positioned in a space between a front end cover (15-1) and a middle end plate (15-2) in the shell (16);
the alternating current contactor (10) and the direct current contactor (12) are positioned in a space between a middle end plate (15-2) and a rear end cover (15-3) in a shell (16), a full-power converter (11) is arranged on the middle end plate, and the excitation power circuit, the rectifying and filtering unit and the starting and power generation control unit (13) are arranged on the rear end cover;
by integrating the parallel hybrid excitation motor and the starter generator controller in the shell of the same shell (16), the full-power converter (11) utilizes the shell (16) and the end cover to dissipate heat.
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| CN111371225B (en) * | 2020-03-31 | 2021-08-31 | 南京航空航天大学 | Double-winding permanent magnet motor power generation system and control method thereof |
| CN113489271B (en) * | 2021-06-21 | 2022-06-10 | 南京航空航天大学 | AC-DC hybrid excitation type motor power generation system |
| CN113489201B (en) * | 2021-06-30 | 2022-07-29 | 南京师范大学 | Wide-high-efficiency-area hybrid linear concentrated winding permanent magnet motor system and control method |
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| WO2016084204A1 (en) * | 2014-11-27 | 2016-06-02 | 成田 憲治 | Synchronous motor |
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