CN113022481B - PMSC (permanent magnet synchronous motor) composite semi-active energy feedback system and working method thereof - Google Patents
PMSC (permanent magnet synchronous motor) composite semi-active energy feedback system and working method thereof Download PDFInfo
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- CN113022481B CN113022481B CN202110286860.6A CN202110286860A CN113022481B CN 113022481 B CN113022481 B CN 113022481B CN 202110286860 A CN202110286860 A CN 202110286860A CN 113022481 B CN113022481 B CN 113022481B
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- 239000002131 composite material Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000001360 synchronised effect Effects 0.000 title description 2
- 239000003990 capacitor Substances 0.000 claims abstract description 49
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
- B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The application discloses a PMSC composite semi-active energy feedback system and a working method thereof, wherein a rotating speed sensor is used for measuring the rotating speed of an inner rotor of a PMSC, an electronic control unit is used for judging the running working condition of a vehicle, and a PWM controller is used for controlling the working state of an IGBT so as to control the charge and discharge working mode of the energy feedback system; when the system is in a charging mode, the super capacitor is charged preferentially, and then the lithium battery is charged through the unidirectional DC/DC converter; when the system is in a discharging mode, the power output distribution of the super capacitor and the lithium battery is determined by the internal state of the super capacitor and the lithium battery, and the working mode is converted through the power diode. The semi-active composite energy feedback system composed of the super capacitor, the lithium battery, the unidirectional DC/DC converter and the power diode is used, so that the semi-active control of the energy feedback system with low cost and high efficiency is realized, and the energy-saving and high-efficiency power transmission is realized.
Description
Technical Field
The application belongs to the technical field of automobile energy storage, and particularly relates to a semi-active composite permanent magnet slip clutch energy feedback system consisting of a super capacitor and a lithium battery and a working method thereof
Background
Aiming at the defect that the boosting characteristic of a hydraulic power steering system (Hydraulic Power Steering System, HPS) which is commonly adopted by medium-heavy commercial vehicles is not changeable, a permanent magnet slip clutch type electric control hydraulic power steering system (P-ECHPS) is proposed, and the rotating speed of an inner rotor in a Permanent Magnet Slip Clutch (PMSC) which is a key component of the system is precisely controlled, so that good boosting control is realized on the whole P-ECHPS system, meanwhile, as a steering pump is driven to operate by the PMSC, the rotating speed of the steering pump can be controlled in an ideal range by adjusting the output rotating speed of the PMSC, a flow control valve in the traditional HPS is not needed, and overflow loss can be avoided.
Compared with a permanent magnet eddy current coupler, the slip energy of the PMSC is converted into slip electric energy in the outer rotor three-phase winding, the slip electric energy is not lost in the form of eddy current heat loss, and the slip electric energy can be recovered through an external control circuit, so that more energy-saving and efficient power transmission is realized.
The Chinese patent 201610101728.2 adopts a self-adaptive nonsingular terminal sliding mode control method, overcomes the problems of system parameter perturbation and external interference uncertainty, reduces buffeting, has strong robustness, realizes accurate control of the output rotating speed of the permanent magnet slip clutch, and ensures that tracking errors are converged to zero rapidly. But the recovery, storage and utilization of PMSC slip energy cannot be considered, including the problems of the design of a PMSC energy feed system, the working method thereof and the like.
Disclosure of Invention
Aiming at the defects existing in the prior art, the application provides a PMSC composite semi-active energy feedback system and a working method thereof; compared with other energy feeding systems, the energy feeding system has lower control complexity and can realize more energy-saving and efficient power transmission.
The technical scheme adopted by the application is as follows:
a PMSC composite semi-active energy feedback system comprises a PMSC external control circuit, an engine, a motor, a PMSC, a charge-discharge control system and a composite energy feedback system; the engine and the motor both provide power for the outer rotor of the PMSC; the PMSC outer control circuit is connected with the PMSC through an electric signal, and the PMSC outer control circuit controls the rotating speed of an outer rotor in the PMSC;
the charge and discharge control system comprises a rotation speed sensor, an electronic control unit, a charge control unit and a discharge control unit; the rotating speed sensor collects the rotating speed of the inner rotor of the PMSC and inputs the rotating speed into the electronic control unit, and the electronic control unit judges whether the vehicle is in a steering working condition according to the rotating speed difference of the inner rotor and the outer rotor; outputting a control instruction to a charging control unit and a discharging control unit according to the working condition of the vehicle; the discharge control unit is respectively connected with the motor and the compound energy feeding system; the charging control unit is respectively connected with the PMSC external control circuit and the composite energy feedback system.
Further, the discharge control unit comprises a first PWM controller, wherein the input end of the first PWM controller is connected with the output end of the electronic control unit and is used for receiving a control instruction output by the electronic control unit; the output end of the first PWM controller is connected with the IGBT 1 Control signal input terminal of (1), IGBT 1 The current input end of (1) is connected with a compound energy feedback system, IGBT 1 The current output end of the motor is connected with the motor; the first PWM controller controls the IGBT according to the control instruction sent by the electronic control unit 1 And further controls whether the motor is powered by the combined energy feed system.
Further, the charging control unit comprises a second PWM controller, and the input end of the second PWM controller is connected with the output end of the electronic control unit and is used for receiving a control instruction output by the electronic control unit; the output end of the second PWM controller is connected with the IGBT 2 Control signal input terminal of (1), IGBT 2 The current input end of (1) is connected with a PMSC external control circuit, IGBT 2 The current output end of the power supply is connected with a compound energy feeding system; the second PWM controller controls the IGBT according to the control instruction sent by the electronic control unit 2 And then controls whether to charge or not in the compound energy feed system.
Further, the composite energy feedback system comprises a super capacitor, a power diode, a unidirectional DC/DC converter and a lithium battery; the power diode is connected with the lithium battery in series and then connected with the super capacitor in parallel, and a unidirectional DC/DC converter is connected between the lithium battery and the super capacitor.
A working method of a PMSC composite semi-active energy feedback system comprises the following steps:
s1, judging whether a vehicle is in a steering working condition according to the rotating speed of an inner rotor of a PMSC;
s2, the electronic control unit outputs a control instruction according to the working condition of the vehicle;
s2.1, if the vehicle is in a steering working condition, the voltage of the PMSC external control circuit is lower than the circuit voltage of the composite energy feedback system, and the electronic control unit outputs a discharge control instruction to the discharge control unit and the charge control unit; the composite energy feedback system enters a discharging process;
s2.2, if the vehicle is in a straight running working condition, the voltage of the PMSC external control circuit is higher than the circuit voltage of the composite energy feeding system, and the electronic control unit outputs a charging control instruction to the discharging control unit and the charging control unit; the composite energy feedback system enters a charging process.
Further, the discharging process in S2.1 is as follows:
s2.1.1 after receiving the discharge control instruction, the discharge control unit and the charge control unit, the first PWM controller controls the IGBT 1 The second PWM controller is communicated with the IGBT 2 Disconnecting;
s2.1.2, judging whether the voltage of the super capacitor is larger than the voltage of the lithium battery; if the voltage of the super capacitor is higher than that of the lithium battery, the super capacitor bears all output power, and the super capacitor supplies power to the motor; when the voltage of the super capacitor drops to the voltage of the lithium battery, the power diode assists the lithium battery to output power together with the super capacitor to supply energy to the motor.
Further, the charging process in S2.2 is as follows:
s2.2.1 after receiving the charge control instruction, the discharge control unit and the charge control unit control the IGBT by the first PWM controller 1 The second PWM controller controls the IGBT to be disconnected 2 Communicating;
s2.2.2, judging whether the super capacitor is full; if the super capacitor is not fully charged, the PMSC external control circuit outputs slip electric energy in the outer rotor three-phase winding, and the slip electric energy is fully used for charging the super capacitor; and after the super capacitor is fully charged, the residual slip electric energy is fully charged to the lithium battery through the unidirectional DC/DC converter.
The application has the beneficial effects that:
the application recovers the slip electric energy of the PMSC by using the composite semi-active energy feeding system formed by the super capacitor and the lithium battery, and controls the charge and discharge states of the semi-active composite energy feeding system of the system in real time according to the running condition of the vehicle, thereby realizing more energy-saving and efficient power transmission. And because of using unidirectional DC/DC converter and power diode, make the energy feedback system control algorithm simple, compare with energy storage system of other configurations, have self-interacting, with low costs, control characteristics such as efficient.
Drawings
FIG. 1 is a block diagram of a semi-active PMSC composite energy feedback system of the present application;
FIG. 2 is a flow chart of a method for controlling a semi-active PMSC composite energy feedback system according to the present application;
in the figure, 1, PMSC external control circuit, 2, engine, 3, PMSC,4, motor, 5, rotation speed sensor, 6, electronic control unit, 7, charge-discharge control system, 8, first PWM controller, 9, IGBT 1 10, a second PWM controller, 11, IGBT 2 12, a composite energy feedback system, 13, a super capacitor, 14, a power diode, 15, a unidirectional DC/DC converter, 16 and a lithium battery.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
As shown in fig. 1, a PMSC composite semi-active energy feed system includes: the system comprises a PMSC external control circuit 1, an engine 2, a motor 4, a PMSC3 (i.e. a permanent magnet slip clutch), a charge-discharge control system 7 and a compound energy feedback system 12.
An output shaft of the engine 2 is connected with an outer rotor of the PMSC3, and the outer rotor of the PMSC3 is driven to rotate by the engine 2.
The PMSC external control circuit 1 is connected with the PMSC3 through an electric signal, and the PMSC external control circuit 1 controls the rotating speed of the external rotor in the PMSC 3.
The current input end of the motor 4 is connected with the compound energy feeding system 12 through a circuit, and the compound energy feeding system 12 supplies energy to the motor 4; the power output end of the motor 4 is connected with the outer rotor of the PMSC3 to assist the engine 2 to drive the outer rotor of the PMSC3 to rotate, so that the load of the engine 2 can be reduced, and the aim of saving energy is achieved.
The charge and discharge control system 7 comprises a rotation speed sensor 5, an electronic control unit 6, a charge control unit and a discharge control unit; the rotating speed sensor 5 is connected with the PMSC3 through an electric signal, and the rotating speed of the inner rotor of the PMSC3 is collected by the rotating speed sensor 5; the output end of the rotation speed sensor 5 is connected with the input end of the electronic control unit 6 through an electric signal, the rotation speed sensor 5 inputs the collected rotation speed of the inner rotor into the electronic control unit 6, and the output end of the electronic control unit 6 is respectively connected with the charging control unit and the discharging control unit. The electronic control unit 6 judges whether the vehicle is in a steering working condition according to the rotation speed difference of the inner rotor and the outer rotor; and outputting a control instruction according to the working condition of the vehicle.
The discharging control unit comprises a first PWM controller 8, wherein the input end of the first PWM controller 8 is connected with the output end of the electronic control unit 6 and is used for receiving a control instruction output by the electronic control unit 6; the output end of the first PWM controller 8 is connected with the IGBT 1 9, IGBT 1 9 is connected with a compound energy feedback system 12, IGBT 1 The current output end of 9 is connected with the motor 4; the first PWM controller 8 controls the IGBT according to the control instruction sent by the electronic control unit 6 1 9, and thus controls whether the motor 4 is powered by the compound energy feed system 12.
The charging control unit comprises a second PWM controller 10, wherein the input end of the second PWM controller 10 is connected with the output end of the electronic control unit 6 and is used for receiving a control instruction output by the electronic control unit 6; the output end of the second PWM controller 10 is connected with an IGBT 2 11, IGBT 2 11 is connected with the PMSC external control circuit 1, IGBT 2 The current output end of the power supply 11 is connected with a compound power supply system 12; the second PWM controller 10 controls the IGBT according to the control instruction sent by the electronic control unit 6 2 11, and further controls whether charging is performed in the composite energy feedback system 12.
The composite energy feedback system 12 comprises a super capacitor 13, a power diode 14, a unidirectional DC/DC converter 15 and a lithium battery 16; specifically, the power diode 14 is connected in series with the lithium battery 16 and then connected in parallel with the super capacitor 13, and a unidirectional DC/DC converter 15 is connected between the lithium battery 16 and the super capacitor 13. The super capacitor 13 in the composite energy feedback system 12 absorbs the impact of instantaneous high current by utilizing the characteristic of high power density, and protects the lithium battery 16, thereby prolonging the service life of the energy storage system, simultaneously releasing the high current in a short time and meeting the requirement of high torque of a steering system when the medium and heavy commercial vehicle steers in situ. The lithium battery 16 can utilize the characteristic of high energy density, increase the energy storage capacity of the energy feedback system, and make up the defect of low energy density of the super capacitor 13 so as to improve the energy storage economy. The unidirectional DC/DC converter 15 may only work when the super capacitor 13 is fully charged, and its main function is to store the remaining energy into the lithium battery, so that the composite energy feedback system 12 has the characteristics of low cost, high efficiency, and the like. The power diode 14 further reduces the operating frequency of the unidirectional DC/DC converter 15, and improves the system operating efficiency.
Based on the above-mentioned PMSC composite semi-active energy feeding system, the application also provides a working method of the PMSC composite semi-active energy feeding system, as shown in figure 2, comprising the following steps:
s1, the electronic control unit 6 judges whether the vehicle is in a steering working condition according to the rotating speed of the rotor in the PMSC3 measured by the rotating speed sensor 5; the basis for judging whether the vehicle is in the steering working condition is as follows: according to the rotational speed of the inner rotor of the PMSC3 measured by the rotational speed sensor 5, if the rotational speed of the inner rotor is less than or equal to 400rpm, judging that the vehicle is in a straight running working condition; and if the rotating speed of the inner rotor is greater than 400rpm, judging that the vehicle is in a steering working condition.
S2, according to the working condition of the vehicle, the composite energy feeding system 12 performs a discharging process or a charging process; in particular, the method comprises the steps of,
s2.1, if the vehicle is in a steering working condition, the voltage of the PMSC external control circuit 1 is lower than the circuit voltage of the composite energy feedback system 12, and the composite energy feedback system 12 enters a discharging process. The control method of the discharge process comprises the following steps:
s2.1.1 after the discharge control unit and the charge control unit receive the discharge control instruction, the first PWM controller 8 controls the IGBTs 1 9 are communicated, and the second PWM controller 10 controls the IGBT 2 11 is disconnected;
s2.1.2, judging whether the voltage of the super capacitor 13 is greater than the voltage of the lithium battery 16; if the voltage of the super capacitor 13 is higher than the voltage of the lithium battery 16, the super capacitor 13 bears the whole output power, and the super capacitor 13 supplies energy to the motor 4; when the voltage of the super capacitor 13 drops to the voltage of the lithium battery 16, the power diode 14 assists the lithium battery 16 to output power together with the super capacitor 13 to supply power to the motor 4; if the discharge state is the condition that the composite energy feeding system 12 is in the power shortage state, the engine 2 continues to drive the PMSC3 outer rotor to rotate.
S2.2, if the vehicle is in a straight running working condition, the voltage of the PMSC external control circuit 1 is higher than the circuit voltage of the composite energy feedback system 12, and the composite energy feedback system 12 enters a charging process. The control method of the charging process comprises the following steps:
s2.2.1 after the discharge control unit and the charge control unit receive the charge control instruction, the first PWM controller 8 controls the IGBTs 1 9 off, the second PWM controller 10 controls the IGBT 2 11 is communicated;
s2.2.2, judging whether the super capacitor 13 is full, if the super capacitor 13 is not full, outputting slip electric energy in the three-phase winding of the outer rotor by the PMSC external control circuit 1, and fully using the slip electric energy in the three-phase winding to charge the super capacitor 13; when the super capacitor 13 is fully charged, the remaining energy is fully charged to the lithium battery 16 through the unidirectional DC/DC converter 15.
The above embodiments are merely for illustrating the design concept and features of the present application, and are intended to enable those skilled in the art to understand the content of the present application and implement the same, the scope of the present application is not limited to the above embodiments. Therefore, all equivalent changes or modifications according to the principles and design ideas of the present application are within the scope of the present application.
Claims (6)
1. The PMSC composite semi-active energy feeding system is characterized by comprising a PMSC external control circuit (1), an engine (2), a motor (4), a PMSC (3), a charge and discharge control system (7) and a composite energy feeding system (12); the engine (2) and the motor (4) both provide power for the outer rotor of the PMSC (3); the PMSC outer control circuit (1) is connected with the PMSC (3) through an electric signal, and the PMSC outer control circuit (1) controls the rotating speed of an outer rotor in the PMSC (3);
the charge and discharge control system (7) comprises a rotation speed sensor (5), an electronic control unit (6), a charge control unit and a discharge control unit; the rotating speed sensor (5) collects the rotating speed of the inner rotor of the PMSC (3) and inputs the rotating speed into the electronic control unit (6), and the electronic control unit (6) judges whether the vehicle is in a steering working condition according to the rotating speed difference of the inner rotor and the outer rotor; outputting a control instruction to a charging control unit and a discharging control unit according to the working condition of the vehicle; the discharge control unit is respectively connected with the motor (4) and the compound energy feeding system (12); the charging control unit is respectively connected with the PMSC external control circuit (1) and the composite energy feeding system (12);
the discharging control unit comprises a first PWM controller (8), wherein the input end of the first PWM controller (8) is connected with the output end of the electronic control unit (6) and is used for receiving a control instruction output by the electronic control unit (6); the output end of the first PWM controller (8) is connected with the IGBT 1 (9) Control signal input terminal of (1), IGBT 1 (9) The current input end of (2) is connected with a compound energy feeding system (12), IGBT 1 (9) The current output end of the motor (4) is connected with the motor; the first PWM controller (8) controls the IGBT according to the control instruction sent by the electronic control unit (6) 1 (9) Thereby controlling whether the compound energy feeding system (12) supplies energy to the motor (4);
the charging control unit comprises a second PWM controller (10), wherein the input end of the second PWM controller (10) is connected with the output end of the electronic control unit (6) and is used for receiving a control instruction output by the electronic control unit (6); the output end of the second PWM controller (10) is connected with the IGBT 2 (11) Control signal input terminal of (1), IGBT 2 (11) The current input end of (1) is connected with the PMSC external control circuit, IGBT 2 (11) The current output end of the power supply is connected with a compound energy feeding system (12); the second PWM controller (10) controls the IGBT according to the control instruction sent by the electronic control unit (6) 2 (11) And further controls whether charging is performed in the composite energy feedback system (12).
2. The PMSC composite semi-active energy feed system of claim 1, wherein the composite energy feed system (12) comprises a super capacitor (13), a power diode (14), a unidirectional DC/DC converter (15) and a lithium battery (16); the power diode (14) is connected in series with the lithium battery (16) and then connected in parallel with the super capacitor (13).
3. A PMSC compound semi-active energy feed system according to claim 2, characterised in that a unidirectional DC/DC converter (15) is connected between the lithium battery (16) and the super capacitor (13).
4. A method of operation of a PMSC composite semi-active energy feed system according to claim 3, comprising the steps of:
s1, judging whether the vehicle is in a steering working condition or not according to the rotating speed of the inner rotor of the PMSC (3);
s2, the electronic control unit (6) outputs a control instruction according to the working condition of the vehicle;
s2.1, if the vehicle is in a steering working condition, the voltage of the PMSC external control circuit (1) is lower than the circuit voltage of the composite energy feeding system (12), and the electronic control unit (6) outputs a discharge control instruction to the discharge control unit and the charge control unit; the composite energy feeding system (12) enters a discharging process;
s2.2, if the vehicle is in a straight running working condition, the voltage of the PMSC external control circuit (1) is higher than the circuit voltage of the composite energy feeding system (12), and the electronic control unit (6) outputs a charging control instruction to the discharging control unit and the charging control unit; the hybrid energy feed system (12) enters a charging process.
5. The method for operating a PMSC composite semi-active energy feed system according to claim 4, wherein the discharging process in S2.1 is:
s2.1.1 after the discharge control unit and the charge control unit receive the discharge control instruction, the first PWM controller (8) controls the IGBT 1 (9) The second PWM controller (10) is communicated with the IGBT 2 (11) Disconnecting;
s2.1.2, judging whether the voltage of the super capacitor (13) is larger than the voltage of the lithium battery (16); if the voltage of the super capacitor (13) is higher than the voltage of the lithium battery (16), the super capacitor (13) bears all output power, and the super capacitor (13) supplies energy to the motor (4); when the voltage of the super capacitor (13) drops to the voltage of the lithium battery (16), the power diode (14) assists the lithium battery (16) to output power together with the super capacitor (13) to supply power to the motor (4).
6. The method for operating a PMSC composite semi-active energy feed system according to claim 4, wherein the charging process in S2.2 is:
after the discharging control unit and the charging control unit receive the charging control instruction, the first PWM controller (8) controls the IGBT 1 (9) The second PWM controller (10) controls IGBT to be disconnected 2 (11) Communicating;
judging whether the super capacitor (13) is full; if the super capacitor (13) is not fully charged, the PMSC external control circuit 1 outputs the slip electric energy in the three-phase winding of the outer rotor, and the slip electric energy is fully used for charging the super capacitor (13); when the super capacitor (13) is fully charged, the residual slip electric energy is fully charged to the lithium battery (16) through the unidirectional DC/DC converter (15).
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| CN113022481A (en) | 2021-06-25 |
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