CN117439358A - Vehicle-mounted alternating current-direct current composite power generation system and control method thereof - Google Patents
Vehicle-mounted alternating current-direct current composite power generation system and control method thereof Download PDFInfo
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- 238000010248 power generation Methods 0.000 title claims abstract description 49
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 56
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 238000011217 control strategy Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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Abstract
The invention discloses a vehicle-mounted alternating current-direct current composite power generation system and a control method thereof, wherein the power generation system comprises an engine and an axial magnetic field permanent magnet motor connected with the engine, and the axial magnetic field permanent magnet motor comprises a first stator component, a second stator component and a rotor component; the first stator component comprises a non-magnetic stator bracket, n first stator windings are distributed on the non-magnetic stator bracket along the circumferential direction, and the first stator windings are litz wire distributed windings; the second stator component includes a magnetically permeable stator core and a second stator winding. The power generation system provided by the invention optimizes the performance and the function of the motor by using the non-magnetic stator bracket and the magnetic stator core and by specially designed layout and installation of the stator winding and the permanent magnet, and particularly realizes high alternating current output power and voltage adjustment rate and high system power density by using double stators and double three-phase stator windings and controlling the lengths of two air gaps.
Description
Technical Field
The invention relates to a vehicle-mounted alternating current-direct current composite power generation system and a control method thereof.
Background
The power supply system of the military special mobile combat vehicle is required to be unique and urgent. These vehicles need an independent power supply system to get rid of the constraint of a large power grid and realize independent power supply, which plays an important role in special combat occasions. However, the loads in special combat situations are complex, and there are both ac and dc loads.
Therefore, the generator set needs to have a function of both dc output and ac output. Because the weight of the vehicle is severely demanded, the weight of the power generation system also needs to be controlled within a reasonable range. In addition, the AC/DC power generation system has higher requirements on the power quality. This requirement results in the need to configure the power generation system with capacitive and inductive components, the presence of which can affect the power density of the system. In addition, in the flux permanent magnet motor of the power supply system, stable output of the ac side voltage is difficult to achieve due to the influence of the armature reaction.
Disclosure of Invention
The invention mainly aims to provide a control method of a vehicle-mounted alternating-current and direct-current composite power generation system.
The aim of the invention can be achieved by adopting the following technical scheme:
the vehicle-mounted alternating current-direct current composite power generation system comprises an engine and an axial magnetic field permanent magnet motor connected with the engine, wherein the axial magnetic field permanent magnet motor comprises a first stator component, a second stator component and a rotor component;
the first stator component comprises a non-magnetic stator bracket, n first stator windings are distributed on the non-magnetic stator bracket along the circumferential direction, and the first stator windings are litz wire distributed windings;
the second stator component comprises a magnetic conduction stator iron core and a second stator winding, m magnetic conduction stator iron core teeth are distributed on the magnetic conduction stator iron core along the circumferential direction, the second stator winding is wound on the magnetic conduction stator iron core teeth, m and n are integers, and m is more than or equal to 2, and n is more than or equal to 2;
the rotor component is arranged between the first stator component and the second stator component, the rotor component comprises a rotor support, x permanent magnet grooves are formed in the side, close to the non-magnetic stator support, of the rotor support along the circumferential direction, y permanent magnet grooves are formed in the side, close to the magnetic stator core, of the rotor support along the circumferential direction, permanent magnets are arranged in the permanent magnet grooves, the magnetizing direction of the permanent magnets is along the axial direction of the motor, and N poles and S poles are alternately distributed;
a first air gap is arranged between the first stator component and the rotor component, a second air gap is arranged between the second stator component and the rotor component, and the length of the first air gap is smaller than that of the second air gap;
the three-phase wire is led out of the first stator winding and the second stator winding respectively, wherein the first stator winding is connected with an alternating current load, the second stator winding is connected with a controllable rectifier, the controllable rectifier is connected with a power battery and a direct current load, and the controllable rectifier adopts a control mode of id=0.
Preferably, the second stator winding is a concentrated winding or a distributed winding.
Preferably, the system further comprises an inverter connected to the controllable rectifier and to another ac load.
Preferably, the controllable rectifier is connected with a power battery.
A control method of a vehicle-mounted alternating current-direct current composite power generation system comprises the following steps:
step 1, starting an engine, and initializing a control system of an axial magnetic field permanent magnet motor and a controllable rectifier;
step 2, monitoring the alternating current load demand, and adjusting the running state of the engine according to the demand, so as to ensure that a first stator component of the axial magnetic field permanent magnet motor generates alternating current which adapts to the alternating current load change, wherein the alternating current load is connected with the first stator component of the axial magnetic field permanent magnet motor to form an alternating current side of the vehicle-mounted alternating current-direct current composite power generation system;
step 3, according to the demand of the direct current load, adjusting the control parameters of a controllable rectifier between the direct current load and a second stator component of the axial magnetic field permanent magnet motor to ensure the stability of direct current output, wherein the controllable rectifier adopts a control mode of id=0, and the direct current load forms the direct current side of the vehicle-mounted alternating current-direct current composite power generation system;
step 4, if faults occur on the alternating current side, immediately allowing the rotor of the axial magnetic field permanent magnet motor to idle, and fully introducing direct-axis current on the direct current side through the controllable rectifier to offset the magnetic field, so that counter electromotive force generated by idle is reduced, an inverter and the whole system connected with an alternating current load are protected, and fault tolerance and stability of the system are improved;
and 5, continuously monitoring the running state and the load demand of the power generation system, and dynamically adjusting the running states of the engine and the axial magnetic field permanent magnet motor according to the real-time demand and the system state to ensure the stable running of the system and meet the load demand.
The beneficial technical effects of the invention are as follows:
1. the power generation system provided by the invention optimizes the performance and the function of the motor by using the non-magnetic conductive stator bracket and the magnetic conductive stator iron core and by specially designed layout and installation of the stator winding and the permanent magnet, and particularly realizes high alternating current output power and voltage adjustment rate and high system power density by using the double stator and the double three-phase stator winding and controlling the lengths of two air gaps.
2. The power generation system provided by the invention can accurately control the direct current output voltage by using the controllable rectifier and adopting the control strategy of id=0, so as to realize stable direct current output, and the control strategy of id=0 simplifies the control strategy and improves the dynamic performance of the system by controlling the d-axis current to be zero under the synchronous rotation coordinate system.
3. The first stator component provided by the invention adopts the litz wire distributed winding, the design effectively increases the performance of output torque, has the characteristic of restraining torque pulsation, and effectively reduces the harmonic content of counter electromotive force, which is helpful for improving the stability of motor output, in addition, the length of the first air gap is far smaller than that of the second air gap, the smaller first air gap is helpful for improving alternating current output power, and further improving the power density of the system, the controllable rectifier connected with the winding of the second stator component adopts a control mode of id=0, the control logic of the power generation system is simplified, stable direct current output can be obtained, meanwhile, the reaction time of the power generation system is reduced, the dynamic performance is improved, and the system can maintain the high power density and the output torque through optimizing the control strategy and the structural design, and meanwhile, the problem of unstable alternating current side voltage output caused by the motor armature reaction is alleviated.
4. The control method of the power generation system provided by the invention allows the motor rotor to idle when the AC side fails, and counteracts the magnetic field by passing the direct-axis current through the DC side, so that the counter electromotive force is reduced to realize the protection of the inverter and the improvement of the fault tolerance of the system, and meanwhile, the strategy is also beneficial to maintaining the stable operation of the system and reducing the possibility of unstable voltage of the AC side caused by the failure.
Drawings
FIG. 1 is a schematic topology of an axial flux permanent magnet machine according to an embodiment of the present invention;
FIG. 2 is a schematic topology of an axial flux permanent magnet machine according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an axial flux permanent magnet machine according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a vehicle-mounted AC/DC hybrid power generation system according to an embodiment of the invention;
fig. 5 is an ac voltage measurement schematic diagram of the vehicle-mounted ac-dc composite power generation system according to an embodiment of the present invention.
In the figure: 100-first stator part, 200-second stator part, 300-rotor part, 400-alternating current load, 500-direct current load, 600-controllable rectifier, 700-first air gap, 800-air gap 2, 101-non-magnetic conductive stator support, 102-first stator winding, 201-magnetic conductive stator core, 202-second stator winding, 301-rotor support, 302-permanent magnet.
Detailed Description
In order to make the technical solution of the present invention more clear and obvious to those skilled in the art, the present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1 to 5, the vehicle-mounted ac/dc composite power generation system provided in this embodiment includes an engine, an axial field permanent magnet motor connected to the engine, where the axial field permanent magnet motor includes a first stator component 100-a second stator component 200 and a rotor component 300, and a crankshaft of the engine and a rotor shaft of the motor are connected through a coupling or through belt transmission;
the first stator component 100 comprises a non-magnetic stator support 101, n first stator windings 102 are uniformly distributed on the non-magnetic stator support 101 along the circumferential direction, and the first stator windings 102 are litz wire distributed windings, so that the design effectively increases the output torque performance, has the characteristic of suppressing torque pulsation, and effectively reduces the harmonic content of counter-potential, thereby improving the output stability of the motor;
the second stator component 200 comprises a magnetic conduction stator core 201 and a second stator winding 202, m magnetic conduction stator core teeth are uniformly distributed on the magnetic conduction stator core 201 along the circumferential direction, the second stator winding 202 is wound on the magnetic conduction stator core teeth, the second stator winding 202 can adopt concentrated windings or distributed windings to adapt to different application requirements and performance requirements, m and n are integers, and m is more than or equal to 2, and n is more than or equal to 2;
the first stator winding 102 on the first stator component 100 and the second stator winding 202 on the second stator component 200 respectively lead out three phase lines, wherein the first stator winding 102 on the first stator component 100 is directly connected with an alternating current load, the second stator winding 202 on the second stator component 200 is connected with a controllable rectifier, and then the controllable rectifier is connected with a direct current load through the controllable rectifier, and the controllable rectifier adopts a control mode of id=0, so that the control logic of the power generation system is simplified;
the direct current load is a power battery, the controllable rectifier adjusts the direct current output voltage according to the electric quantity condition of the power battery, when the electric quantity of the power battery is insufficient, the controllable rectifier controller outputs higher direct current output voltage so as to accelerate the charging speed of the power battery, wherein the controllable rectifier adopts a control mode of id=0, so that the reaction time of a power generation system can be reduced, the dynamic performance can be improved, and the charging efficiency of the power battery can be improved;
the power generation system also comprises an inverter, wherein the inverter is connected to the controllable rectifier and is connected with the alternating current load so as to convert direct current generated by the controllable rectifier into alternating current for other alternating current loads;
the controllable rectifier and its control mode (id=0 control mode) provide stability for the dc output, and by accurately controlling the current, the stability of the dc output can be ensured, and the requirements of the dc load of the vehicle are satisfied, specifically:
the control mode of id=0 means that under the synchronous rotation coordinate system, d-axis current (id) is controlled to be zero, under the control strategy, the rectifier only generates q-axis current (iq), which is helpful for reducing the reaction time of the power generation system and improving the dynamic performance, and through accurately controlling iq, the accurate control of direct current output voltage can be realized, so that stable direct current output is obtained;
for the control scheme, more specifically:
a) Converting the three-phase current into d-axis and q-axis currents using dq transformation (alternatively referred to as Park transformation), the d-axis and q-axis being related to the position of the magnetic field and the rotor, respectively, in a synchronous rotation coordinate system;
b) In the "control mode of id=0", the power generation system is controlled to zero d-axis current, which means that all currents are on q-axis, so that the control strategy can be simplified and focus on adjusting q-axis current to control output voltage, which is used to realize rapid and accurate voltage control of the power generation system of the vehicle, especially under dynamic conditions;
c) The controllable rectifier can rapidly respond to the change of the direct current load of the vehicle and the disturbance of the system by controlling the q-axis current, so that stable direct current output is realized;
the windings of the first stator component 100 are directly connected to an ac load, and because the litz wire distributed windings are adopted, the winding mode can effectively increase the performance of output torque, inhibit torque pulsation and reduce the harmonic content of counter electromotive force, thereby improving the stability of motor output, which means that the first stator component 100 is mainly used for generating stable ac output in a vehicle-mounted ac-dc composite power generation system;
the windings of the second stator part 200 are connected to a controllable rectifier, and then to a dc load through the controllable rectifier, the controllable rectifier functions to convert the ac power generated from the second stator part 200 into dc power for use by the dc load, and a stable dc output can be obtained by adjusting a control parameter (id=0 control mode) of the controllable rectifier;
the rotor component 300 is arranged between the first stator component 100 and the second stator component 200, and comprises a rotor support 301 and permanent magnets 302, wherein the rotor support can be a stainless steel support, x permanent magnet grooves are uniformly formed in the rotor support 301 at one side close to the non-magnetic stator support 101 along the circumferential direction, y permanent magnet grooves are uniformly formed in the rotor support 301 at one side close to the magnetic stator core 201 along the circumferential direction, the permanent magnets 302 are arranged in corresponding permanent magnet grooves, the magnetizing directions of the permanent magnets are alternately distributed along the axial direction of the motor, N poles and S poles are alternately distributed, so that stable magnetic fields can be generated, the interference of an external magnetic field on the magnetic field of the motor can be reduced by the alternately distributed N poles and S poles, the stability and reliability of the motor in a complex environment can be improved, and due to the high magnetic field utilization efficiency, the axially magnetized permanent magnets can provide larger output power under smaller volume and weight, and the power density of the motor can be improved;
the number of permanent magnets of the rotor member 300 satisfies the condition: y is larger than or equal to 2, and satisfies 6000/x relation, wherein x is the running speed of the engine so as to ensure that the alternating current side outputs 50Hz of alternating current output, and the alternating current side outputs voltage waveforms with the electric frequency of 50Hz, as shown in FIG. 5.
A first air gap 700 exists between the first stator part 100 and the rotor part 300, a second air gap 800 exists between the second stator part 200 and the rotor part 300 so as to form a double-stator double-three-phase stator winding, the length of the first air gap 700 is about 0.8 mm-1.3 mm, and the length of the second air gap 800 is about 3.0 mm-4.0 mm, so that the alternating current output power is improved, and the system power density is improved;
the difference in length of the first and second air gaps may optimize the performance of the axial field permanent magnet motor, the first air gap being a non-magnetic region between the first stator component 100 and the rotor component 300, the first air gap being smaller, the magnetic field energy being more efficiently transferred from the stator portion to the rotor portion than the second air gap, thereby improving the efficiency and output power of the motor, the smaller air gap also reducing the pulsation of the magnetic field, thereby enabling the power generation system to output a more stable voltage;
while a larger air gap reduces the density of the magnetic field, thereby reducing the loss and heat generated by the magnetic field, which helps to increase the power density (output power per unit volume or weight) of the motor, which is particularly important for meeting the weight of the vehicle, an axial field permanent magnet motor with high power density can be lighter at the same output power, thereby helping to reduce the weight of the vehicle.
In this embodiment, the magnetically conductive stator core 201 is made of silicon steel sheet, and the non-magnetically conductive stator support 101 is made of composite material, so that the design can meet the requirements of low harmonic and high output characteristics of alternating current and the requirements of high efficiency and high power density of the controllable rectifying direct current load.
In this embodiment, when the vehicle-mounted ac/dc composite power generation system fails, the motor rotor idles, the magnetic field of the permanent magnet generates a high no-load counter potential, the high counter potential generates high voltage impact on the switching device of the inverter and the load on the ac side, and in order to improve the safety, the direct-axis current is introduced into the dc side, and the principle of weak magnetic control is utilized to reduce the no-load counter potential impact, thereby playing a role in protecting the ac load and the inverter and improving the fault tolerance capability of the inverter.
In the embodiment, the vehicle-mounted alternating current-direct current composite power generation system realizes that one of stable alternating current and direct current is output at the running time of a vehicle or is output independently, meets the power supply requirement, is beneficial to improving the power density, simplifies the architecture of the system, has small cogging torque and greatly reduces vibration noise, and is particularly suitable for a mute unit.
In this embodiment, the motor used in the vehicle ac/dc hybrid power generation system includes two stator components and a rotor component, where the first stator component 100 and the second stator component 200 each have their own windings, and these windings generate electromotive force in response to the magnetic field change of the rotor component, and since the windings of the two stator components are separated, the two stator components can generate and adjust electromotive force, respectively, and one of them is connected to a controllable rectifier, so as to meet the requirements of ac and dc loads.
A control method of a vehicle-mounted alternating current-direct current composite power generation system comprises the following steps:
step 1, starting an engine, and initializing a control system of an axial magnetic field permanent magnet motor and a controllable rectifier;
step 2, monitoring the alternating current load demand, and adjusting the running state of the engine according to the demand, so as to ensure that a first stator component of the axial magnetic field permanent magnet motor generates alternating current which adapts to the alternating current load change, wherein the alternating current load is connected with the first stator component of the axial magnetic field permanent magnet motor to form an alternating current side of the vehicle-mounted alternating current-direct current composite power generation system;
step 3, according to the demand of the direct current load, adjusting the control parameters of a controllable rectifier between the direct current load and a second stator component of the axial magnetic field permanent magnet motor to ensure the stability of direct current output, wherein the controllable rectifier adopts a control mode of id=0, and the direct current load forms the direct current side of the vehicle-mounted alternating current-direct current composite power generation system;
step 4, if faults occur on the alternating current side, immediately allowing the rotor of the axial magnetic field permanent magnet motor to idle, and fully introducing direct-axis current on the direct current side through the controllable rectifier to offset the magnetic field, so that counter electromotive force generated by idle is reduced, an inverter and the whole system connected with an alternating current load are protected, and fault tolerance and stability of the system are improved;
and 5, continuously monitoring the running state and the load demand of the power generation system, and dynamically adjusting the running states of the engine and the axial magnetic field permanent magnet motor according to the real-time demand and the system state to ensure the stable running of the system and meet the load demand.
In summary, in this embodiment, the control method of the vehicle-mounted ac/dc hybrid power generation system provided in this embodiment allows the motor rotor to idle when the ac side fails, and counteracts the magnetic field by passing the direct-axis current through the dc side, so as to reduce the counter electromotive force, thereby protecting the inverter and improving the fault tolerance of the system.
The above description is merely a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art will be able to apply equivalents and modifications according to the technical solution and the concept of the present invention within the scope of the present invention disclosed in the present invention.
Claims (5)
1. The vehicle-mounted alternating current-direct current composite power generation system is characterized by comprising an engine and an axial magnetic field permanent magnet motor connected with the engine, wherein the axial magnetic field permanent magnet motor comprises a first stator component (100), a second stator component (200) and a rotor component (300);
the first stator component (100) comprises a non-magnetic stator support (101), n first stator windings (102) are distributed on the non-magnetic stator support (101) along the circumferential direction, and the first stator windings (102) are litz wire distributed windings;
the second stator component (200) comprises a magnetic conduction stator core (201) and a second stator winding (202), m magnetic conduction stator core teeth are distributed on the magnetic conduction stator core (201) along the circumferential direction, the second stator winding (202) is wound on the magnetic conduction stator core teeth, m and n are integers, and m is more than or equal to 2, n is more than or equal to 2;
the rotor component (300) is arranged between the first stator component and the second stator component, the rotor component (300) comprises a rotor support (301), x permanent magnet grooves are formed in the side, close to the non-magnetic stator support (101), of the rotor support (301) along the circumferential direction, y permanent magnet grooves are formed in the side, close to the magnetic stator core (201), of the rotor support (301), permanent magnets (302) are arranged in the permanent magnet grooves, the magnetizing direction of the permanent magnets is along the axial direction of the motor, and N poles and S poles are alternately distributed;
a first air gap (700) is arranged between the first stator component (100) and the rotor component (300), a second air gap (800) is arranged between the second stator component and the rotor component (300), and the length of the first air gap (700) is smaller than that of the second air gap (800);
the three-phase line type power supply is characterized in that three phase lines are led out of the first stator winding (102) and the second stator winding (202) respectively, wherein the first stator winding (102) is connected to an alternating current load, the second stator winding (202) is connected to a controllable rectifier, the controllable rectifier is connected to a power battery and a direct current load, and the controllable rectifier adopts a control mode of id=0.
2. A vehicle-mounted ac/dc hybrid power generation system according to claim 1, wherein the second stator winding (202) is a concentrated winding or a distributed winding.
3. The vehicle-mounted ac/dc hybrid power generation system of claim 2, further comprising an inverter coupled to the controllable rectifier and to another ac load.
4. A vehicle-mounted ac/dc hybrid power generation system according to claim 3, wherein the controllable rectifier is connected to a power battery.
5. A control method of a vehicle-mounted alternating current-direct current composite power generation system, which is characterized in that the vehicle-mounted alternating current-direct current composite power generation system is the vehicle-mounted alternating current-direct current composite power generation system according to any one of claims 1-4, and the control method comprises the following steps:
step 1, starting an engine, and initializing a control system of an axial magnetic field permanent magnet motor and a controllable rectifier;
step 2, monitoring the alternating current load demand, and adjusting the running state of the engine according to the demand, so as to ensure that a first stator component of the axial magnetic field permanent magnet motor generates alternating current which adapts to the alternating current load change, wherein the alternating current load is connected with the first stator component of the axial magnetic field permanent magnet motor to form an alternating current side of the vehicle-mounted alternating current-direct current composite power generation system;
step 3, according to the demand of the direct current load, adjusting the control parameters of a controllable rectifier between the direct current load and a second stator component of the axial magnetic field permanent magnet motor to ensure the stability of direct current output, wherein the controllable rectifier adopts a control mode of id=0, and the direct current load forms the direct current side of the vehicle-mounted alternating current-direct current composite power generation system;
step 4, if faults occur on the alternating current side, immediately allowing the rotor of the axial magnetic field permanent magnet motor to idle, and fully introducing direct-axis current on the direct current side through the controllable rectifier to offset the magnetic field, so that counter electromotive force generated by idle is reduced, an inverter and the whole system connected with an alternating current load are protected, and fault tolerance and stability of the system are improved;
and 5, continuously monitoring the running state and the load demand of the power generation system, and dynamically adjusting the running states of the engine and the axial magnetic field permanent magnet motor according to the real-time demand and the system state to ensure the stable running of the system and meet the load demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431628.2A CN117439358A (en) | 2023-10-31 | 2023-10-31 | Vehicle-mounted alternating current-direct current composite power generation system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431628.2A CN117439358A (en) | 2023-10-31 | 2023-10-31 | Vehicle-mounted alternating current-direct current composite power generation system and control method thereof |
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