CN111490583A - Generator control method and device, power supply device and power supply system - Google Patents
Generator control method and device, power supply device and power supply system Download PDFInfo
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- CN111490583A CN111490583A CN202010296139.0A CN202010296139A CN111490583A CN 111490583 A CN111490583 A CN 111490583A CN 202010296139 A CN202010296139 A CN 202010296139A CN 111490583 A CN111490583 A CN 111490583A
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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
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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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
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1415—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with a generator driven by a prime mover other than the motor of a vehicle
-
- 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
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1469—Regulation of the charging current or voltage otherwise than by variation of field
- H02J7/1492—Regulation of the charging current or voltage otherwise than by variation of field by means of controlling devices between the generator output and the battery
Abstract
The embodiment of the invention provides a generator control method, a generator control device, a power supply device and a power supply system, and relates to the technical field of power supply control. The method comprises the following steps: acquiring the voltage amplitude, the output power and the real-time output current of the generator; obtaining the regulating opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage so as to enable the voltage amplitude to be the same as the target voltage; decoupling the real-time output current to obtain d-axis current and q-axis current; acquiring feedback voltage output by the power conversion module; and adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage. The generator control method, the generator control device, the power supply device and the power supply system provided by the invention can meet the charging requirements of the battery under different charging powers.
Description
Technical Field
The invention relates to the technical field of power supply control, in particular to a generator control method, a generator control device, a power supply device and a power supply system.
Background
Some electronic devices cannot supply power due to the fact that mains supply is inconvenient to use or the mains supply fails, and a generator mode can be adopted to charge batteries of the electronic devices.
However, in the conventional charging control method of the generator, when the charging power of the battery changes, adaptive charging adjustment cannot be made according to the change of the charging power.
Disclosure of Invention
In view of the above, the present invention provides a generator control method, a generator control device, a power supply device, and a power supply system, which can meet charging requirements of batteries at different charging powers.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment provides a generator control method applied to a controller, where the controller is electrically connected to a throttle of an engine, a generator and a power conversion module, and the method includes:
acquiring the voltage amplitude, the output power and the real-time output current of the generator;
obtaining the regulating opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage, so that the voltage amplitude is the same as the target voltage;
decoupling the real-time output current to obtain d-axis current and q-axis current;
acquiring a feedback voltage output by the power conversion module;
and adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage.
In a second aspect, an embodiment provides a generator control device applied to a controller, where the controller is electrically connected to a throttle of an engine, a generator and a power conversion module, and the device includes:
the acquisition module is used for acquiring the voltage amplitude, the output power and the real-time output current of the generator;
the accelerator adjusting module is used for obtaining the adjusting opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage so as to enable the voltage amplitude to be the same as the target voltage;
the decoupling module is used for decoupling the real-time output current to obtain d-axis current and q-axis current;
the obtaining module is further configured to obtain a feedback voltage output by the power conversion module;
and the charging adjusting module is used for adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage.
In a third aspect, an embodiment provides a power supply device, including a controller and a power conversion module, where the controller is electrically connected to a throttle of an engine, a generator and the power conversion module;
the controller is used for acquiring the voltage amplitude, the output power and the real-time output current of the generator;
the controller is further used for obtaining the adjusting opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage, so that the voltage amplitude is the same as the target voltage;
the controller is further used for decoupling the real-time output current to obtain d-axis current and q-axis current;
the controller is further used for acquiring a feedback voltage output by the power conversion module;
the controller is further configured to adjust on-time and off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current, and the q-axis current, so as to adjust the feedback voltage to be the same as the constant voltage.
In a fourth aspect, an embodiment provides a power supply system, which includes an engine, a generator, and the power supply device of the third aspect, wherein the generator is electrically connected to a battery through the power supply device, and the engine is electrically connected to the power supply device and the generator respectively.
According to the generator control method, the generator control device, the power supply device and the power supply system, the opening degree of the accelerator is adjusted through the voltage amplitude and the output power of the generator, so that the voltage amplitude of the generator is stabilized to be the value of the target voltage, and the voltage amplitude can follow the value of the target voltage no matter what kind of charging requirement is met by the battery, so that the charging requirements of the battery under different charging powers can be met. Meanwhile, a vector control strategy is realized according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current, and the constant-voltage constant-current charging requirement required by a charging curve of the battery can be met.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a power supply system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power supply device according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a power supply device according to an embodiment of the present invention;
FIG. 4 is a flow chart illustrating a generator control method according to an embodiment of the present invention;
FIG. 5 is a sub-flowchart of step S302 shown in FIG. 4;
FIG. 6 is a sub-flowchart of step S305 shown in FIG. 4;
FIG. 7 is a signal trend topology diagram of a generator control method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a generator control device according to an embodiment of the present invention.
The icon comprises a power supply system 10, a power supply device 11, a controller 111, a power conversion module 112, a first-phase driving unit 1121, a second-phase driving unit 1122, a third-phase driving unit 1123, an engine 12, a throttle 121, a generator 13, a generator control device 14, an acquisition module 141, a throttle adjusting module 142, a decoupling module 143, a charging adjusting module 144, a battery 20, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a fifth switch tube Q5, a sixth switch tube Q6, a first resistor R1, a second resistor R2, a third resistor R3, a first inductor L1, a first inductor L2, a second inductor R362, and a third inductor L3.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an implementation of the power supply system 10 according to the present embodiment. The power supply system 10 includes a power supply device 11, an engine 12 and a generator 13, wherein the generator 13 is electrically connected with a battery 20 through the power supply device 11, and the engine 12 is electrically connected with the power supply device 11 and the generator 13 respectively.
In the embodiment, the battery 20 is a battery 20 in the electronic device, the battery 20 may be a detachable battery, that is, the battery 20 may be detached from the electronic device, and the battery 20 may be plugged into the power supply system 10 to achieve electrical connection with the power supply apparatus 11. The battery 20 may also be a non-removable battery, i.e. the battery 20 may be integrated with the electronic device, and the battery 20 may be electrically connected to the power supply 11 via a power line. The electronic device may be an unmanned aerial vehicle, an unmanned vehicle, or the like.
The battery 20 may be a lithium battery, a secondary battery, or the like, and in the present embodiment, the battery 20 is exemplified as a lithium battery. The engine 12 may be a diesel engine. The generator 13 may be an alternator, and may specifically be a magneto (PGM). The engine 12 may be connected to the generator 13 through a rotating shaft.
When the battery 20 is electrically connected to the power supply device 11, the power supply device 11 is configured to convert the ac power output by the generator 13 into dc power and transmit the dc power to the battery 20, so as to charge the battery 20.
Fig. 2 is a schematic structural diagram of the power supply apparatus 11 shown in fig. 1. The power supply device 11 includes a controller 111 and a power conversion module 112, the controller 111 is electrically connected to a throttle 121 of the engine 12, the generator 13 and the power conversion module 112, and the generator 13 is electrically connected to the battery 20 through the power conversion module 112.
In the present embodiment, when the battery 20 is electrically connected to the power conversion module 112, the controller 111 is configured to obtain the voltage amplitude, the output power, and the real-time output current of the generator 13; the controller 111 is further configured to obtain an adjusted opening degree of the accelerator 121 according to the voltage amplitude, the output power, and a preset target voltage, so that the voltage amplitude is the same as the target voltage; the controller 111 is further configured to perform decoupling processing on the real-time output current to obtain a d-axis current and a q-axis current; the controller 111 is further configured to obtain a feedback voltage output by the power conversion module 112; the controller 111 is also configured to adjust the on-time and the off-time of the power conversion module 112 according to the feedback voltage, the preset constant voltage, the d-axis current, and the q-axis current to adjust the feedback voltage to be the same as the constant voltage. The alternating current output by the generator 13 includes a voltage amplitude and a real-time output current, and the direct current converted by the power supply device 11 includes a feedback voltage output by the power conversion module 112.
It can be understood that the controller 111 can adjust the mechanical energy generated by the engine 12 driving the generator 13 to rotate by adjusting the opening of the throttle 121, and thus adjust the rotation speed of the generator 13, and the change of the rotation speed of the generator 13 can correspondingly adjust the real-time output voltage.
In the present embodiment, the controller 111 employs a vector control strategy to regulate the feedback voltage to be the same as the constant voltage to achieve the charging control of the battery 20. The control of the charging power of the generator 13 by the controller 111 may be equivalent to the control of the output electromagnetic torque of the generator 13. The electromagnetic torque of the generator 13 can be calculated according to the following formula:
wherein, TeIs the electromagnetic torque, p is the pole pair number of the generator 13, phifIs the rotor flux linkage of the generator 13 isdFor the stator d-axis current, i, of the generator 13sqL for generator 13 stator q-axis currentsdL for stator d-axis inductance of generator 13sqIs the generator 13 stator q-axis inductance.
In the present embodiment, if a control strategy that the d-axis current is zero current, that is, a generator 13 rotor magnetic field orientation control strategy is adopted, an effect that the electromagnetic torque is proportional to the torque current, that is, an effect that the electromagnetic torque is proportional to the q-axis current can be obtained. Thus, the purpose of controlling the output electromagnetic torque of the generator 13 by controlling the q-axis current, namely, the purpose of controlling the charging efficiency of the generator 13 and the output electromagnetic torque by adjusting the q-axis current.
It can be seen that the opening degree of the accelerator 121 is adjusted by the voltage amplitude and the output power of the generator 13, so that the voltage amplitude of the generator 13 is stabilized to be the value of the target voltage, and the voltage amplitude can follow the value of the target voltage no matter which kind of battery 20 with the charging requirement is used, so that the charging requirements of the battery 20 under different charging powers can be met. Meanwhile, a vector control strategy is realized according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current, and the constant-voltage and constant-current charging requirement required by the charging curve of the battery 20 can be met.
Fig. 3 is a schematic circuit diagram of an implementation of the power conversion module 112 shown in fig. 2. The power conversion module 112 may adopt a three-phase six-way switch module; and the power conversion module 112 may also adopt a BOOST topology similar to a BOOST topology, and is configured to BOOST and convert the ac output by the generator 13 to obtain dc. Because the power conversion module 112 can adopt a BOOST topology similar to BOOST, the withstand voltage of devices such as power resistor-capacitor and the like can be selected to be a low withstand voltage value, so that the structure of the power supply device 11 is simple and the volume is smaller.
In this embodiment, the power conversion module 112 includes a first phase driving unit 1121, a second phase driving unit 1122, and a third phase driving unit 1123, the first phase driving unit 1121 includes a first switching tube Q1, a second switching tube Q2, and a first resistor R1, the second phase driving unit 1122 includes a third switching tube Q3, a fourth switching tube Q4, and a second resistor R2, and the third phase driving unit 1123 includes a fifth switching tube Q5, a sixth switching tube Q6, and a third resistor R3.
A first pin of a first switch tube Q1, a first pin of a second switch tube Q2, a first pin of a third switch tube Q3, a first pin of a fourth switch tube Q4, a first pin of a fifth switch tube Q5 and a first pin of a sixth switch tube Q6 are all electrically connected with the controller 111, a second pin of the first switch tube Q1, a second pin of the third switch tube Q3 and a second pin of the fifth switch tube Q5 are all electrically connected with the positive electrode of the battery 20, a second pin of the second switch tube Q2 is electrically connected with a third pin of the first switch tube Q1, a second pin of the fourth switch tube Q4 is electrically connected with a third pin of the third switch tube Q3, a second pin of the sixth switch tube Q6 is electrically connected with a third pin of the fifth switch tube Q5, a first phase port of the generator 13 is electrically connected between the third pin of the first switch tube Q1 and the second pin of the fourth switch tube Q3, and a second pin of the fourth switch tube Q68613, the third phase port of the generator 13 is electrically connected between the third pin of the fifth switch tube Q5 and the second pin of the sixth switch tube Q6, the third pin of the second switch tube Q2 is electrically connected to the negative electrode of the battery 20 through the first resistor R1, the third pin of the fourth switch tube Q4 is electrically connected to the negative electrode of the battery 20 through the second resistor R2, and the third pin of the sixth switch tube Q6 is electrically connected to the negative electrode of the battery 20 through the third resistor R3.
It can be understood that the controller 111 may generate six control signals to the first pin of the first switch tube Q1, the first pin of the second switch tube Q2, the first pin of the third switch tube Q3, the first pin of the fourth switch tube Q4, the first pin of the fifth switch tube Q5, and the first pin of the sixth switch tube Q6, so as to control on-time and off-time of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6, respectively, thereby achieving the same feedback voltage as the constant voltage.
The first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 may all adopt MOS transistors (metal-oxide semiconductor field effect transistors), the first pin of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 may be understood as the gate of the MOS transistor, the second pin of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 may be understood as the drain of the MOS transistor, and the source pin of the first switching tube Q1, the second switching tube Q2, the fifth switching tube Q5 and the sixth switching tube Q828653 may be understood as the source of the third switching tube Q828653 and the fourth switching tube Q862. A first phase port of the generator 13 may be set to the a-phase, a second phase port of the generator 13 may be set to the B-phase, and a third phase port of the generator 13 may be set to the C-phase.
Further, in this embodiment, the first phase driving unit 1121 further includes a first inductor L1, the second phase driving unit 1122 further includes a second inductor L2, the third phase driving unit 1123 further includes a third inductor L3, a first phase port of the generator 13 is electrically connected between the third pin of the first switching tube Q1 and the second pin of the second switching tube Q2 through the first inductor L1, a second phase port of the generator 13 is electrically connected between the third pin of the third switching tube Q3 and the second pin of the fourth switching tube Q4 through the second inductor L2, and a third phase port of the generator 13 is electrically connected between the third pin of the fifth switching tube Q5 and the second pin of the sixth switching tube Q6 through the third inductor L3.
It is understood that the first inductor L1, the second inductor L2 and the third inductor L03 are used for compensating the inductance of the generator 13 and/or the inductance of the battery 20. that is, the first inductor L11, the second inductor L2 and the third inductor L3 are used for storing electric energy to compensate the inductance of the generator 13 and/or the inductance of the battery 20. in this case, the first inductor L1, the second inductor L2 and the third inductor L3 may be determined according to the inductance of the generator 13 and the inductance of the battery 20. of course, the power conversion module 112 may also determine whether the first inductor L1, the second inductor L2 and the third inductor L3 are required to be provided according to the inductance of the generator 13 and the inductance of the battery 20.
Fig. 4 is a schematic flow chart of a generator control method according to an embodiment of the present invention. It should be noted that, the generator control method provided in the embodiment of the present invention is not limited by fig. 4 and the following specific sequence, and it should be understood that, in other embodiments, the sequence of some steps in the generator control method provided in the embodiment of the present invention may be interchanged according to actual needs, or some steps in the generator control method may be omitted or deleted. The generator control method can be applied to the controller 111 shown in fig. 2-3, and the specific flow shown in fig. 4 will be described in detail below.
Step S301, acquiring the voltage amplitude, the output power and the real-time output current of the generator.
In this embodiment, the voltage amplitude of the generator 13 is the amplitude of the ac voltage output by the generator 13, and the specific principle of obtaining the voltage amplitude is as follows: acquiring alternating voltage output by the generator 13 in real time; and carrying out amplitude calculation on the alternating voltage to obtain a voltage amplitude. The ac voltage output by the generator 13 in real time is a three-phase ac voltage.
In the present embodiment, the real-time output current is a three-phase alternating current of the generator 13, and the real-time output current includes a first-phase real-time current, a second-phase real-time current, and a third-phase real-time current. The first phase real-time current may be an a-phase real-time current, the second phase real-time current may be a b-phase real-time current, and the third phase real-time current may be a c-phase real-time current.
In this embodiment, the generator 13 may include a voltage collecting unit (not shown) and a current collecting unit (not shown), and both the voltage collecting unit and the current collecting unit are electrically connected to the controller 111. The voltage acquisition unit is configured to acquire an ac voltage output by the generator 13 in real time, and send the ac voltage output in real time to the controller 111. The current collecting unit is configured to collect the ac current output by the generator 13 in real time, and send the ac current output in real time to the controller 111. The controller 111 may calculate the output power according to the real-time output ac voltage and the real-time output ac current. The voltage acquisition unit can adopt a sampling resistor, and the current acquisition unit can adopt a mutual inductor.
And step S302, obtaining the regulating opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage, so that the voltage amplitude is the same as the target voltage.
In the present embodiment, the preset target voltage may be set according to the real-time charging voltage when the battery 20 is charged. The target voltage can be calculated by the following formula:
wherein, VrefFor representing a target voltage, VminFor representing a minimum target voltage; vmaxFor representing the maximum target voltage, VoutFor indicating the real-time charging voltage, k, of the battery 20 during charging1For representing the first coefficient.
It can be understood that the minimum target voltage VminAnd a maximum target voltage VmaxMay be determined by the minimum and maximum voltages at which the battery 20 is allowed to charge. Minimum target voltage VminAnd a maximum target voltage VmaxThe minimum voltage and the maximum voltage that can be allowed to be charged in the battery 20, respectively, can be obtained by multiplying the minimum voltage and the maximum voltage that can be allowed to be charged in the battery 20, respectively, by a coefficient. Real-time charging voltage V when charging battery 20outWhich may also be understood as the feedback voltage output by the power conversion module 112.
In the present embodiment, if the real-time charging voltage V isoutBy a first coefficient k1If it is less than or equal to the minimum target voltage VminA value of (1), thenNominal voltage VrefIs taken as the minimum target voltage VminThe value of (c). If the real-time charging voltage VoutBy a first coefficient k1If it is greater than the minimum target voltage VminIs less than the maximum target voltage VmaxOf (b), then the target voltage VrefIs taken as a real-time charging voltage VoutBy a first coefficient k1The value of (c). If the real-time charging voltage VoutBy a first coefficient k1If it is greater than or equal to the maximum target voltage VmaxOf (b), then the target voltage VrefIs taken as the maximum target voltage VmaxThe value of (c).
At a real-time charging voltage VoutBy a first coefficient k1If it is less than or equal to the minimum target voltage VminWhen the value of (1) is greater than the target voltage VrefIs set to the minimum target voltage VminA value of (d); and at a real-time charging voltage VoutBy a first coefficient k1If it is greater than or equal to the maximum target voltage VmaxWhen the value of (1) is greater than the target voltage VrefIs set to the maximum target voltage VmaxCan prevent the set target voltage VrefToo large or too small, thereby ensuring that the battery 20 is not damaged by overvoltage or undervoltage during charging.
Wherein the first coefficient k1The value of (d) may be set to less than 1. In particular, the first coefficient k1The value of (A) can be in the range of 0.5-0.9. In the present embodiment, the first coefficient k1Is set to 0.85. Because the power conversion module 112 is in a boost topology, the real-time charging voltage VoutShould be greater than the target voltage VrefValue of (1), first coefficient k1Should be set to less than 1. And to account for current relationships, duty cycle limits, control margins, etc. of the power conversion module 112 and to prevent the real-time charging voltage VoutAnd a target voltage VrefThe first coefficient k is too large because the power loss of the power conversion module 112 is too large1The value of (A) is set in the range of 0.5-0.9.
Step S303, decoupling the real-time output current to obtain d-axis current and q-axis current.
In this embodiment, the controller 111 sequentially performs Clark conversion and Park conversion (Park conversion) on the real-time output current to obtain a d-axis current and a q-axis current. When performing the Park conversion, the controller 111 also substitutes the phase angle of the generator 13 to obtain the d-axis current and the q-axis current.
The phase angle of the generator 13 can be calculated from the alternating voltage, the alternating current, and the rotation speed of the generator 13 by angle calculation. The generator 13 may further include a rotation speed collecting unit electrically connected to the controller 111, and the rotation speed collecting unit is configured to collect a rotation speed of the generator 13 and transmit the rotation speed to the controller 111. Wherein, the rotating speed acquisition unit can adopt a rotating speed sensor or a Hall sensor.
Step S304, obtaining the feedback voltage output by the power conversion module.
In this embodiment, the feedback voltage output by the power conversion module 112 may also be understood as a real-time charging voltage when the battery 20 is charged, and the feedback voltage output by the power conversion module 112 may also be understood as a dc voltage output by the power supply device 11.
The power supply device 11 further includes a voltage collector (not shown), the voltage collector is electrically connected to the controller 111, and the voltage collector is configured to collect the feedback voltage at the output end of the power conversion module 112 and transmit the feedback voltage to the controller 111. The voltage collector may employ a sampling resistor.
Step S305, adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage.
In this embodiment, the controller 111 may employ a vector control strategy to regulate the feedback voltage to be the same as the constant voltage to achieve the charging control of the battery 20.
In this embodiment, referring to fig. 5, the controller 111 obtains the adjusted opening degree of the accelerator 121 according to the voltage amplitude, the output power and the preset target voltage by the following steps:
and S401, obtaining the initial adjustment opening of the accelerator according to the difference value of the voltage amplitude and the target voltage.
In this embodiment, the controller 111 may calculate the difference between the voltage amplitude and the target voltage by a proportional control algorithm (also known as a P control algorithm) to obtain an initial adjustment opening of the accelerator 121.
It is understood that the voltage difference value and the adjustment opening degree of the accelerator 121 may be preset in correspondence. For example, the difference between the voltage amplitude and the target voltage is 1V, and the corresponding opening degree of the accelerator 121 may be 1 degree; the difference between the voltage amplitude and the target voltage is 2V, and the corresponding opening degree of the accelerator 121 may be 2 degrees. If the voltage amplitude is 2.5V different from the target voltage, the initial adjustment opening may correspond to 2.5 degrees.
And step S402, determining an adjusting opening according to the initial adjusting opening of the accelerator.
In the present embodiment, since the accelerator 121 is adjusted by a stepping motor, the adjustment of the opening degree of the accelerator 121 is small as the magnitude of the initial adjustment opening degree is small, and the engine 12 is in a stable state. Therefore, in order to prevent the accelerator 121 from greatly jumping, the magnitude of the initial adjustment opening needs to be compared with a preset limiting opening range, and if the magnitude of the initial adjustment opening is within the limiting opening range, the initial adjustment opening is used as the adjustment opening. If the initial adjustment opening degree is not within the amplitude limiting opening degree range, obtaining the maximum adjustable opening degree or the minimum adjustable opening degree according to the amplitude limiting opening degree range, and taking the maximum adjustable opening degree or the minimum adjustable opening degree as the adjustment opening degree.
It can be understood that the opening degree of the accelerator 121 of the engine 12 is changed according to the magnitude of the initial adjustment opening degree, and if the magnitude of the initial adjustment opening degree is within the range of the limit opening degree, the bounce width of the accelerator 121 is not calculated, and the engine 12 can be in a stable state. If the magnitude of the initial adjustment opening is not within the range of the limiter opening, it is considered that the bounce magnitude of the accelerator 121 is too large to allow the engine 12 to be in a stable state, and therefore the initial adjustment opening needs to be limited. The maximum adjustable opening degree can be the maximum value of the amplitude limiting opening degree range, and the minimum adjustable opening degree can be the minimum value of the amplitude limiting opening degree range. If the opening is adjusted to be positive, the controller 111 will increase the opening of the throttle 121; if the adjusted opening degree is negative, the controller 111 decreases the opening degree of the accelerator 121.
For example, the clipping opening degree range may be set to [ -Kmax，Kmax]If the opening K is initially adjustedFirst stageGreater than the maximum adjustable opening KmaxThen the maximum adjustable opening K is setmaxAs for adjusting the opening KRegulating device(ii) a If the opening K is initially adjustedFirst stageOpening less than minimum adjustable-KmaxThen the minimum adjustable opening-K is setmaxAs for adjusting the opening KRegulating device(ii) a If the opening K is initially adjustedFirst stageAt [ -K [ ]max，Kmax]Within the range, then the opening K will be initially adjustedFirst stageAs for adjusting the opening KRegulating device。
And S403, adjusting the adjusting opening degree of the accelerator according to the variable quantity of the output power to obtain the adjusting opening degree of the accelerator.
In this embodiment, while the controller 111 adjusts the opening degree of the accelerator 121 of the motor according to the real-time output voltage of the generator 13, the controller 111 may further perform a superimposed adjustment of the opening degree of the accelerator 121 of the motor according to the amount of change in the output power. The operation of the controller 111 adjusting the opening degree of the accelerator 121 of the motor based on the real-time output voltage and the operation of adjusting the opening degree of the accelerator 121 of the motor based on the amount of change in the output power are performed in parallel.
In the present embodiment, the specific principle of the controller 111 adjusting the adjustment opening of the accelerator 121 according to the variation of the output power is as follows: calculating to obtain the variable quantity of the output power through a preset sampling period; calculating to obtain a fine adjustment opening according to the variable quantity of the output power; and adjusting the adjusting opening according to the fine adjustment opening to obtain the adjusting opening of the accelerator 121.
It can be understood that the variation of the output power is obtained by subtracting the final output power corresponding to the final time of the sampling period from the initial output power corresponding to the initial time of the sampling period.
In this embodiment, the fine adjustment opening may be calculated by using the following formula:
Kpow＝k2*PΔ-Pmax≤PΔ≤Pmax；
wherein, KpowFor indicating the fine adjustment opening, k2For representing a second coefficient, PΔFor indicating the amount of change, P, in output powermaxFor representing a preset maximum variation of the output power.
It can be understood that if the output power changes by a certain amount PΔIf the opening degree is larger than 0, the controller 111 increases the opening degree of the throttle valve 121; if the variation P of the output powerΔEqual to 0, the opening of the throttle 121 remains unchanged; if the variation P of the output powerΔLess than 0, the controller 111 decreases the opening of the accelerator 121. The controller 111 synchronously adjusts the opening degree of the accelerator 121 when the output power of the generator 13 changes, so that the generator 13 tends to be in a stable state more easily.
Referring to fig. 6, the controller 111 adjusts the on-time and the off-time of the power conversion module 112 according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current, so as to adjust the feedback voltage to be the same as the constant voltage, which can be implemented by the following steps:
step S501, obtaining a target current of the generator according to the feedback voltage and the constant voltage.
In the present embodiment, the specific principle of the controller 111 obtaining the target current of the generator 13 according to the feedback voltage and the preset constant voltage is as follows: the controller 111 may calculate a difference between the feedback voltage and the constant voltage by a proportional-integral control algorithm (also known as a PI control algorithm) to obtain an initial target current; comparing the initial target current with a preset amplitude limiting current range, and if the initial target current is within the amplitude limiting current range, taking the initial target current as the target current; and if the initial target current is not within the amplitude limiting current range, obtaining the maximum adjustable current or the minimum adjustable current according to the amplitude limiting current range, and taking the maximum adjustable current or the minimum adjustable current as the target current.
In this embodiment, comparing the initial target current with the range of the limiting current can prevent the dc jitter output by the power supply device 11 from being too large.
It will be appreciated that the maximum adjustable current is the maximum value of the range of clipping current and the minimum adjustable current is the minimum value of the range of clipping current. For example, if the clipping current range is set to [0, I ]max]Then the maximum adjustable current is ImaxThe minimum adjustable current is 0. If the initial target current is larger than the maximum adjustable current ImaxThen the maximum adjustable current ImaxAs a target current; if the initial target current is smaller than the minimum adjustable current 0, taking the minimum adjustable current 0 as the target current; if the initial target current is [0, Imax]Within the range, the initial target current is taken as the target current.
In the present embodiment, when the feedback voltage is lower than the constant voltage, that is, the difference between the feedback voltage and the constant voltage is negative, the initial target current is a certain value, and the certain value may be set as the maximum current value allowed when the battery 20 is charged. When the feedback voltage is higher than or equal to the constant voltage, and the difference between the feedback voltage and the constant voltage is 0 or positive, the value of the initial target current may be determined according to the characteristics of the battery 20. For example, when the feedback voltage is higher than or equal to the constant voltage, and the difference between the feedback voltage and the constant voltage is 0 or positive, the value of the initial target current may be linearly related to the difference between the feedback voltage and the constant voltage.
Step S502, a q-axis target voltage is obtained according to the target current and the q-axis current.
In this embodiment, the controller 111 may calculate the difference between the target current and the q-axis current by a proportional-integral control algorithm to obtain the q-axis target voltage.
Step S503, obtaining a d-axis target voltage according to the d-axis current and preset current parameters; wherein, the value of the preset current parameter is zero.
In this embodiment, the controller 111 may calculate a difference between the preset current parameter and the d-axis current through a proportional-integral control algorithm to obtain a d-axis target voltage.
In order to prevent the direct current output by the power supply device 11 from having an excessively large jitter amplitude, the controller 111 may further perform amplitude limiting control on the d-axis target voltage, that is, compare the d-axis target voltage with a preset d-axis amplitude limiting voltage range, and if the d-axis target voltage is within the preset d-axis amplitude limiting voltage range, take the d-axis target voltage as a final d-axis target voltage; if the d-axis target voltage is not within the d-axis amplitude limiting voltage range, obtaining the maximum adjustable d-axis voltage or the minimum adjustable d-axis voltage according to the d-axis amplitude limiting voltage range, and taking the maximum adjustable d-axis voltage or the minimum adjustable d-axis voltage as the final d-axis target voltage.
In this embodiment, the preset current parameter is set to zero in order to implement a zero current control strategy. If the preset current parameter is zero, the controller 111 controls the d-axis current to follow the preset current parameter through a proportional-integral control algorithm, that is, the d-axis current is finally controlled to be zero. When the d-axis current is zero, that is, the magnetic field orientation of the rotor is indicated, so that the electromagnetic torque is in direct proportion to the q-axis current, and the q-axis current is controlled to follow the target current, so that the electromagnetic torque can be output by controlling the generator 13 to adjust the charging current of the battery 20.
Step S504, the on-time and the off-time of the power conversion module are adjusted according to the q-axis target voltage and the d-axis target voltage, so that the feedback voltage is adjusted to be the same as the constant voltage.
In the present embodiment, if the controller 111 performs the clip control on the d-axis target voltage, the controller 111 adjusts the on-time and the off-time of the power conversion module 112 according to the q-axis target voltage and the final d-axis target voltage. If the controller 111 does not perform the clipping control on the d-axis target voltage, the controller 111 performs the adjustment of the on-time and the off-time of the power conversion module 112 according to the q-axis target voltage and the d-axis target voltage.
In the present embodiment, the principle that the controller 111 adjusts the on-time and the off-time of the power conversion module 112 according to the q-axis target voltage and the d-axis target voltage is explained by taking the example that the controller 111 does not perform the clip control on the d-axis target voltage. The specific principle is as follows: the controller 111 performs reverse Clark change and reverse Park conversion on the q-axis target voltage and the d-axis target voltage to obtain a three-phase target voltage; the on-time and off-time of the power conversion module 112 are adjusted according to the three-phase target voltage and the voltage amplitude such that the voltage amplitude is the same as the three-phase target voltage. The phase angle is required to be substituted for calculation in the process that the controller 111 performs inverse and inverse Park conversion on the q-axis target voltage and the d-axis target voltage to obtain the three-phase target voltage.
It is understood that the three-phase target voltage includes a first-phase target voltage, a second-phase target voltage, and a third-phase target voltage, and the alternating-current voltage output by the generator 13 includes a first-phase alternating-current voltage, a second-phase alternating-current voltage, and a third-phase alternating-current voltage. The controller 111 adjusts the on-time and the off-time of the first-phase driving unit 1121 according to the first-phase target voltage and the first-phase alternating-current voltage so that the first-phase alternating-current voltage is the same as the first-phase target voltage; adjusting on-time and off-time of the second phase driving unit 1122 according to the second phase target voltage and the second phase ac voltage so that the second phase ac voltage is the same as the second phase target voltage; the on-time and off-time of the third phase drive unit 1123 are adjusted according to the third phase target voltage and the third phase alternating voltage so that the third phase alternating voltage is the same as the third phase target voltage.
Since the voltage amplitude is calculated from the alternating-current voltage, the adjustment of the voltage amplitude can be achieved by adjusting the first-phase alternating-current voltage, the second-phase alternating-current voltage, and the third-phase alternating-current voltage. Meanwhile, the power conversion module 112 can convert the ac power output by the generator 13 into dc power and supply the battery 20 with the dc power. Since the alternating current of the generator 13 comprises an alternating voltage, the direct current can be regulated by regulating the voltage amplitude. Since the direct current includes a feedback voltage, the feedback voltage can be adjusted by adjusting the direct current.
It can be understood that if the first-phase ac voltage is lower than the first-phase target voltage, the controller 111 correspondingly increases the on-time of the first-phase driving unit 1121, and decreases the off-time of the first-phase driving unit 1121. If the second-phase ac voltage is lower than the second-phase target voltage, the controller 111 may correspondingly increase the on-time of the second-phase driving unit 1122 and decrease the off-time of the second-phase driving unit 1122. If the third phase ac voltage is lower than the third phase target voltage, the controller 111 correspondingly increases the on-time of the third phase driving unit 1123 and decreases the off-time of the third phase driving unit 1123.
Referring to fig. 7, a signal trend topological graph for implementation of the generator control method provided in this embodiment is provided, and the working principle of the generator control method can be specifically divided into an accelerator 121 control part and a battery 20 charging control part. The specific working principle of the throttle 121 control part is as follows: according to the real-time charging voltage V when the battery 20 is chargedoutSetting a target voltage VrefAnd simultaneously according to the alternating voltage Vin acquired by the voltage acquisition unitabcAlternating current Iin acquired by the current acquisition unitabcAmplitude calculation is carried out to obtain real-time output voltage Vamp. And then calculating the difference value between the real-time output voltage and the target voltage through a proportional control algorithm to obtain the initial adjustment opening of the accelerator 121, and limiting the initial adjustment opening to determine the adjustment opening. And then the opening degree is adjusted according to the variation of the output power to obtain the adjusted opening degree of the accelerator 121.
The specific working principle of the charging control part of the battery 20 is as follows: the battery 20 charge control part mainly adopts a vector control strategy, firstly decouples the real-time output current to obtain a d-axis current Id and a q-axis current Iq, then performs proportional-integral control calculation on the d-axis current Id and a preset current parameter with a zero value to obtain a d-axis target voltage, and performs amplitude limiting control on the d-axis target voltage to obtain a final d-axis target voltage Vd. Meanwhile, the target current Iamp is obtained through calculation according to the voltage loop control looprefThe target current IamprefSpecifically, the feedback voltage V outputted by the power conversion module 112outAnd a constant voltage Vout determined according to the voltage of the battery 20refAnd calculating by a proportional integral control algorithm. Then, a q-axis target voltage Vq is obtained through calculation according to a current loop control loop, specifically, a target current Iamp is obtainedrefAnd calculating the difference value of the q-axis current Iq by a proportional integral control algorithm to obtain a q-axis target voltage Vq. Performing anti-Clark change and anti-Park conversion on the final d-axis target voltage Vd, q-axis target voltage and phase angle theta to obtain a three-phase target voltage, and adjusting the on-time and off-time of the power conversion module 112 according to the three-phase target voltage and the voltage amplitude to enable the voltage amplitude and the three-phase target voltageAnd the same is achieved in that the feedback voltage is the same as the constant voltage.
It can be seen that by controlling the constant voltage VoutrefAnd target current IamprefThe value of (d) can be controlled to control the constant voltage and the constant current for charging the battery 20, thereby realizing the constant voltage and constant current charging process of the battery 20. The constant voltage Vout is regulated for different types of batteries 20 and for different operating conditions of the batteries 20refAnd target current IamprefThe values of (d) can be matched to the charging requirements of the different power batteries 20.
In order to execute the corresponding steps in the above-described embodiment and each possible manner, an implementation manner of the generator control device 14 is given below, and optionally, the generator control device 14 may adopt the component structure of the controller 111 shown in fig. 2. Further, referring to fig. 8, fig. 8 is a functional block diagram of a generator control device 14 according to an embodiment of the present invention. It should be noted that the basic principle and the generated technical effect of the generator control device 14 provided in the present embodiment are the same as those of the above embodiments, and for the sake of brief description, no part of the present embodiment is mentioned, and corresponding contents in the above embodiments may be referred to. The generator control device 14 includes: an acquisition module 141, a throttle adjustment module 142, a decoupling module 143, and a charge adjustment module 144.
The obtaining module 141 is used for obtaining the voltage amplitude, the output power and the real-time output current of the generator 13.
The obtaining module 141 is further configured to obtain a feedback voltage output by the power conversion module 112.
It is understood that the obtaining module 141 may execute the contents of step S301 and step S304.
The accelerator adjusting module 142 is configured to obtain an adjusted opening degree of the accelerator 121 according to the voltage amplitude, the output power, and a preset target voltage, so that the voltage amplitude is the same as the target voltage.
The accelerator adjusting module 142 is configured to obtain an initial adjustment opening degree of the accelerator 121 according to a difference between the voltage amplitude and the target voltage; determining an adjusting opening according to the initial adjusting opening of the accelerator 121; and adjusting the adjusting opening according to the variable quantity of the output power to obtain the adjusting opening of the accelerator 121.
It is understood that the throttle 121 opening degree adjusting module may execute the contents of step S302, step S401, step S402 and step S403.
The decoupling module 143 is configured to decouple the real-time output current to obtain a d-axis current and a q-axis current.
It is understood that the decoupling module 143 can perform the above-mentioned step S303.
The charge adjusting module 144 is configured to adjust the on-time and the off-time of the power converting module 112 according to the feedback voltage, the preset constant voltage, the d-axis current, and the q-axis current, so as to adjust the feedback voltage to be the same as the constant voltage.
The charging regulation module 144 is configured to obtain a target current of the generator 13 according to the feedback voltage and the constant voltage; obtaining a q-axis target voltage according to the target current and the q-axis current; obtaining a d-axis target voltage according to the d-axis current and preset current parameters; wherein the preset current parameter value is zero; the on-time and off-time of the power conversion module 112 are adjusted according to the q-axis target voltage and the d-axis target voltage to adjust the feedback voltage to be the same as the constant voltage.
It is understood that the charging adjustment module 144 may execute the contents of step S305, step S501, step S502, step S503 and step S504.
Alternatively, the above modules may be stored in the controller 111 shown in fig. 2 in the form of software or Firmware (Firmware), and may be executed by the controller 111. Meanwhile, data, codes of programs, and the like required to execute the above modules may be stored in the controller 111.
In summary, according to the generator control method, the generator control device, the power supply device and the power supply system provided by the embodiment of the invention, the voltage amplitude, the output power and the real-time output current of the generator are obtained; obtaining the regulating opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage so as to enable the voltage amplitude to be the same as the target voltage; decoupling the real-time output current to obtain d-axis current and q-axis current; acquiring feedback voltage output by the power conversion module; and adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage. Therefore, the opening degree of the accelerator is adjusted through the voltage amplitude and the output power of the generator, so that the voltage amplitude of the generator is stabilized to be the value of the target voltage, and the voltage amplitude can follow the value of the target voltage no matter which kind of battery with the charging requirement is used, so that the charging requirements of the battery under different charging powers can be met. Meanwhile, a vector control strategy is realized according to the feedback voltage, the preset constant voltage, the d-axis current and the q-axis current, and the constant-voltage constant-current charging requirement required by a charging curve of the battery can be met.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A generator control method is applied to a controller, the controller is electrically connected with a throttle of an engine, a generator and a power conversion module, and the method comprises the following steps:
acquiring the voltage amplitude, the output power and the real-time output current of the generator;
obtaining the regulating opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage, so that the voltage amplitude is the same as the target voltage;
decoupling the real-time output current to obtain d-axis current and q-axis current;
acquiring a feedback voltage output by the power conversion module;
and adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage.
2. The generator control method according to claim 1, wherein the step of obtaining the adjusted opening degree of the throttle valve based on the voltage amplitude, the output power and a preset target voltage so that the voltage amplitude is the same as the target voltage comprises:
obtaining the initial adjustment opening degree of the accelerator according to the difference value of the voltage amplitude and the target voltage;
determining an adjusting opening according to the initial adjusting opening of the accelerator;
and adjusting the adjusting opening according to the variable quantity of the output power so as to obtain the adjusting opening of the accelerator.
3. The generator control method according to claim 2, wherein the step of determining the adjusted opening degree according to the magnitude of the initial adjustment opening degree of the accelerator includes:
comparing the initial adjustment opening degree with a preset amplitude limiting opening degree range, and if the initial adjustment opening degree is within the amplitude limiting opening degree range, taking the initial adjustment opening degree as the adjustment opening degree;
and if the initial adjustment opening is not within the amplitude limiting opening range, obtaining a maximum adjustable opening or a minimum adjustable opening according to the amplitude limiting opening range, and taking the maximum adjustable opening or the minimum adjustable opening as the adjustment opening.
4. The generator control method according to any one of claims 1 to 3, wherein the power conversion module is further electrically connected to a battery, the power conversion module being configured to charge the battery; the target voltage is calculated by the following formula:
wherein, VrefFor representing a target voltage, VminFor representing a minimum target voltage; vmaxFor representing the maximum target voltage, VoutFor watchesIndicating the real-time charging voltage, k, of the battery during charging1For representing the first coefficient.
5. The generator control method according to claim 2, wherein the step of adjusting the adjustment opening degree according to the amount of change in the output power to obtain the adjusted opening degree of the accelerator includes:
calculating to obtain the variable quantity of the output power through a preset sampling period;
calculating to obtain a fine adjustment opening according to the variable quantity of the output power;
and adjusting the adjusting opening according to the fine adjustment opening to obtain the adjusting opening of the accelerator.
6. The generator control method according to claim 5, wherein the fine adjustment opening degree is calculated using the following formula:
Kpow＝k2*PΔ-Pmax≤PΔ≤Pmax；
wherein, KpowFor indicating the fine adjustment opening, k2For representing a second coefficient, PΔFor representing the variation of said output power, PmaxFor representing a preset maximum variation of the output power.
7. The generator control method according to claim 1, wherein the step of adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current, and the q-axis current to adjust the feedback voltage to be the same as the constant voltage comprises:
obtaining a target current of the generator according to the feedback voltage and the constant voltage;
obtaining a q-axis target voltage according to the target current and the q-axis current;
obtaining a d-axis target voltage according to the d-axis current and preset current parameters; wherein the preset current parameter value is zero;
and adjusting the on-time and the off-time of the power conversion module according to the q-axis target voltage and the d-axis target voltage so as to adjust the feedback voltage to be the same as the constant voltage.
8. The generator control method according to claim 7, wherein the step of obtaining the target current of the generator from the feedback voltage and the constant voltage includes:
calculating the difference value of the feedback voltage and the constant voltage through a proportional-integral control algorithm to obtain an initial target current;
comparing the initial target current with a preset amplitude limiting current range, and if the initial target current is within the amplitude limiting current range, taking the initial target current as the target current;
if the initial target current is not within the amplitude limiting current range, obtaining a maximum adjustable current or a minimum adjustable current according to the amplitude limiting current range, and taking the maximum adjustable current or the minimum adjustable current as the target current.
9. The generator control method of claim 7, wherein the step of obtaining a q-axis target voltage from the target current and the q-axis current comprises:
and calculating the difference value of the target current and the q-axis current through a proportional-integral control algorithm to obtain the q-axis target voltage.
10. The generator control method of claim 7, wherein the step of obtaining a d-axis target voltage according to the d-axis current and a preset current parameter comprises:
and calculating the difference value of the preset current parameter and the d-axis current through a proportional-integral control algorithm to obtain the d-axis target voltage.
11. The generator control method of claim 7, wherein the step of adjusting the on-time and the off-time of the power conversion module according to the q-axis target voltage and the d-axis target voltage to adjust the feedback voltage to be the same as the constant voltage comprises:
performing reverse Clark conversion and reverse Park conversion on the q-axis target voltage and the d-axis target voltage to obtain a three-phase target voltage;
and adjusting the on-time and the off-time of the power conversion module according to the three-phase target voltage and the voltage amplitude so as to enable the voltage amplitude to be the same as the three-phase target voltage.
12. A generator control device is applied to a controller, the controller is electrically connected with a throttle of an engine, a generator and a power conversion module, and the device comprises:
the acquisition module is used for acquiring the voltage amplitude, the output power and the real-time output current of the generator;
the accelerator adjusting module is used for obtaining the adjusting opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage so as to enable the voltage amplitude to be the same as the target voltage;
the decoupling module is used for decoupling the real-time output current to obtain d-axis current and q-axis current;
the obtaining module is further configured to obtain a feedback voltage output by the power conversion module;
and the charging adjusting module is used for adjusting the on-time and the off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current and the q-axis current so as to adjust the feedback voltage to be the same as the constant voltage.
13. The power supply device is characterized by comprising a controller and a power conversion module, wherein the controller is electrically connected with an accelerator of an engine, a generator and the power conversion module;
the controller is used for acquiring the voltage amplitude, the output power and the real-time output current of the generator;
the controller is further used for obtaining the adjusting opening degree of the accelerator according to the voltage amplitude, the output power and a preset target voltage, so that the voltage amplitude is the same as the target voltage;
the controller is further used for decoupling the real-time output current to obtain d-axis current and q-axis current;
the controller is further used for acquiring a feedback voltage output by the power conversion module;
the controller is further configured to adjust on-time and off-time of the power conversion module according to the feedback voltage, a preset constant voltage, the d-axis current, and the q-axis current, so as to adjust the feedback voltage to be the same as the constant voltage.
14. A power supply system comprising an engine, a generator and a power supply device according to claim 13, the generator being electrically connected to a battery through the power supply device, the engine being electrically connected to the power supply device and the generator respectively.
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