CN112757919B - Electric automobile driving and charging integrated circuit based on single-phase filter inductor - Google Patents

Electric automobile driving and charging integrated circuit based on single-phase filter inductor Download PDF

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CN112757919B
CN112757919B CN202110108932.8A CN202110108932A CN112757919B CN 112757919 B CN112757919 B CN 112757919B CN 202110108932 A CN202110108932 A CN 202110108932A CN 112757919 B CN112757919 B CN 112757919B
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contact
phase
converter
contact switch
bridge arm
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CN112757919A (en
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杜贵平
雷雁雄
李土焕
陈思强
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

The invention discloses an electric automobile driving and charging integrated circuit based on a single-phase filter inductor, which is realized by a parallel connection mode and a serial connection mode. The parallel implementation mode comprises a power battery, a bidirectional DC/DC converter, a three-bridge-arm DC/AC converter, a three-phase motor, an auxiliary inductor, a conversion contact switch, a single-contact switch and an alternating current interface; the series connection type realization mode comprises a power battery, a bidirectional DC/DC converter, a three-bridge arm DC/AC converter, a three-phase motor, an auxiliary inductor, a conversion contact switch, a first single-contact switch, a second single-contact switch and an alternating current interface. The circuit can realize three-phase input quick charging only by externally connecting a one-phase filter inductor, greatly reduces the volume and weight of a charging system, and has the advantages of high power density, simple principle and high reliability; in addition, the circuit is flexible in implementation mode and wide in application range: the parallel implementation mode uses fewer change-over switches, the circuit is simpler, the serial implementation mode has large equivalent inductance, and the filtering effect is better.

Description

Electric automobile driving and charging integrated circuit based on single-phase filter inductor
Technical Field
The invention relates to the technical field of charging of new energy automobiles, in particular to an electric automobile driving and charging integrated circuit based on single-phase filter inductance.
Background
It is well known in the art that high power density and high reliability motor drive and battery charging systems are key technology platforms supporting the development of electric vehicles. At present, a three-phase permanent magnet synchronous motor or a three-phase induction motor is mostly adopted as a driving motor of an electric automobile; there are two main types of battery charging systems: the non-vehicle charging type and the vehicle charging type are characterized in that the charging pile is built outside the vehicle and can directly provide direct current to a power battery of the electric vehicle, the volume of the non-vehicle charging type and the weight of the vehicle are not occupied, and therefore the non-vehicle charging type and the vehicle charging type can be designed to be in a higher power level and used for quick charging of the battery. The vehicle-mounted charger is installed in the vehicle, can directly get electricity from an alternating current power grid, has small dependence on external facilities, can increase the volume and the weight of the vehicle, influences the endurance of the electric vehicle, and has small general charging power. As the motor driving system and the vehicle-mounted charging system of the electric automobile work in a time-sharing mode, and the circuit structure, the used devices and the like are similar, students propose that the motor driving system is utilized to realize the battery charging function, and an electric automobile driving and charging integrated circuit is constructed to realize three-phase input quick charging.
Based on a three-phase permanent magnet synchronous motor or a three-phase induction motor driving system, the following two driving and charging integrated schemes compatible with three-phase alternating current input quick charging are mainly adopted at present: (1) the three-phase filter inductor is externally connected, only three switch bridge arms are shared, the driving inverter is reused as a three-phase rectifier, and a three-phase motor is idle during charging; (2) the three-phase motor is used as the other phase filter inductor, and the three stator windings of the motor flow into the same phase current, so that the torque of the motor can be eliminated, and the static charging of the automobile can be kept. The inductor is a key element influencing the volume, weight and cost of the charger, the external inductor is more in the scheme, the volume and weight of the system are increased, and the integration level is not high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a safe and reliable electric automobile driving and charging integrated circuit based on single-phase filter inductance with higher power density.
In order to achieve the above purpose, the invention provides a technical scheme as follows: the electric automobile driving and charging integrated circuit based on the single-phase filter inductor comprises a power battery, a bidirectional DC/DC converter, a three-bridge-arm DC/AC converter, a three-phase motor, an auxiliary inductor, a conversion contact switch, a single-contact switch and an alternating-current interface;
three bridge arms of the three-bridge-arm DC/AC converter are respectively a first bridge arm, a second bridge arm and a third bridge arm; the three-phase motor comprises three stator windings, namely a first stator winding, a second stator winding and a third stator winding, wherein each stator winding is provided with two wiring terminals; the conversion contact switch comprises a common contact and two conversion contacts which are respectively a first contact and a second contact; the alternating current interface is provided with three wiring terminals, namely a first wiring terminal, a second wiring terminal and a third wiring terminal;
the positive electrode and the negative electrode of the low-voltage side of the bidirectional DC/DC converter are respectively connected with the positive electrode and the negative electrode of the power battery, and the positive electrode and the negative electrode of the high-voltage side of the bidirectional DC/DC converter are respectively connected with the positive electrode and the negative electrode of the three-bridge-arm DC/AC converter;
two ends of a first stator winding of the three-phase motor are respectively connected with a first bridge arm midpoint of the three-bridge arm DC/AC converter and a first connecting terminal of the AC interface, two ends of a second stator winding of the three-phase motor are respectively connected with a common contact of the transfer contact switch and a second connecting terminal of the AC interface, and two ends of a third stator winding of the three-phase motor are respectively connected with a third bridge arm midpoint of the three-bridge arm DC/AC converter and a second connecting terminal of the AC interface; the three wiring terminals connected with the alternating current interface of the three-phase motor are a group of homonymous terminals, and the other three wiring terminals of the three-phase motor are another group of homonymous terminals;
two ends of the auxiliary inductor are respectively connected with the middle point of a second bridge arm of the three-bridge-arm DC/AC converter and a third connecting terminal of the alternating current interface;
the first contact and the second contact of the conversion contact switch are respectively connected with the middle point of a second bridge arm and the middle point of a third bridge arm of the three-bridge-arm DC/AC converter; and two ends of the single-contact switch are respectively connected with a first wiring terminal and a second wiring terminal of the alternating current interface.
Further, when the first contact of the conversion contact switch is closed, the second contact is disconnected, and the single contact switch is closed, the circuit works in a motor driving mode; when the first contact of the changeover contact switch is opened, the second contact of the changeover contact switch is closed and the single-contact switch is opened, the circuit works in a battery charging mode, and two stator windings of the three-phase motor are connected in parallel.
Further, in the battery charging mode, when the input source is a three-phase power grid, three connection terminals of the alternating current interface are connected with the power grid, and when the input source is a single-phase power grid, any two connection terminals of the alternating current interface are connected with the power grid.
Further, the three-phase motor is a three-phase permanent magnet synchronous motor or a three-phase induction motor with wires led out from two ends of three stator windings.
The other technical scheme provided by the invention is as follows: the electric automobile driving and charging integrated circuit based on the single-phase filter inductor comprises a power battery, a bidirectional DC/DC converter, a three-bridge-arm DC/AC converter, a three-phase motor, an auxiliary inductor, a conversion contact switch, a first single-contact switch, a second single-contact switch and an alternating current interface;
three bridge arms of the three-bridge-arm DC/AC converter are respectively a first bridge arm, a second bridge arm and a third bridge arm; the three-phase motor comprises three stator windings, namely a first stator winding, a second stator winding and a third stator winding, wherein each stator winding is provided with two wiring terminals; the conversion contact switch comprises a common contact and two conversion contacts which are respectively a first contact and a second contact; the alternating current interface is provided with three wiring terminals, namely a first wiring terminal, a second wiring terminal and a third wiring terminal;
the positive electrode and the negative electrode of the low-voltage side of the bidirectional DC/DC converter are respectively connected with the positive electrode and the negative electrode of the power battery, and the positive electrode and the negative electrode of the high-voltage side of the bidirectional DC/DC converter are respectively connected with the positive electrode and the negative electrode of the three-bridge-arm DC/AC converter;
two ends of a first stator winding of the three-phase motor are respectively connected with a first bridge arm midpoint of the three-bridge arm DC/AC converter and a first connecting terminal of the AC interface, two ends of a second stator winding of the three-phase motor are respectively connected with a common contact of the change-over contact switch and a second connecting terminal of the AC interface, and two ends of a third stator winding of the three-phase motor are respectively connected with a third bridge arm midpoint of the three-bridge arm DC/AC converter and a second contact of the change-over contact switch; the three wiring terminals of the three-phase motor, which are connected with the first wiring terminal, the second wiring terminal of the alternating current interface and the second contact of the change-over contact switch, are a group of homonymous terminals, and the other three wiring terminals of the three-phase motor are another group of homonymous terminals;
two ends of the auxiliary inductor are respectively connected with the middle point of a second bridge arm of the three-bridge-arm DC/AC converter and a third connecting terminal of the alternating current interface;
a first contact of the conversion contact switch is connected with a middle point of a second bridge arm of the three-bridge arm DC/AC converter; two ends of the first single-contact switch are respectively connected with a first connecting terminal and a second connecting terminal of the alternating current interface; and two ends of the second single-contact switch are respectively connected with a second wiring terminal of the alternating current interface and a second contact of the conversion contact switch.
Further, when the first contact of the conversion contact switch is closed, the second contact of the conversion contact switch is opened, and the first single-contact switch and the second single-contact switch are both closed, the circuit works in a motor driving mode; when the first contact of the changeover contact switch is opened, the second contact of the changeover contact switch is closed, and the first single-contact switch and the second single-contact switch are both opened, the circuit works in a battery charging mode, and at the moment, two stator windings of the three-phase motor are connected in series.
Further, in the battery charging mode, when the input source is a three-phase power grid, three connection terminals of the alternating current interface are connected with the power grid, and when the input source is a single-phase power grid, any two connection terminals of the alternating current interface are connected with the power grid.
Further, the three-phase motor is a three-phase permanent magnet synchronous motor or a three-phase induction motor with wires led out from two ends of three stator windings.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. low external inductance and high power density
Compared with the scheme of externally connecting a three-phase or two-phase filter inductor, the invention only needs to be externally connected with a one-phase filter inductor, has less externally added power devices, greatly reduces the volume and the weight of the charging system and has high power density.
2. Simple principle and high reliability
When the driving mode is switched to be consistent with that of a traditional three-phase motor driving circuit, the driving mode is controlled by adopting a traditional motor; when the charging mode is switched to, the three-phase PWM rectifier circuit is consistent with the traditional three-phase PWM rectifier circuit, only power factor correction control is needed, the parallel connection type utilizes the parallel connection of the two-phase motor stator windings to divide the current equally, the series connection type two-phase motor stator windings naturally flow the same current, the elimination of motor torque can be realized without additional current sharing control, and the reliability is high.
3. Flexible realization mode and wide application range
The invention has two realization modes of parallel connection and serial connection, and can be selected according to different requirements: the parallel implementation mode has smaller equivalent inductance and relatively larger current THD value, but uses less change-over switches, has simple circuit and is suitable for application occasions with higher power density requirements; although the number of the used change-over switches is relatively large, the equivalent inductance is large, the filtering effect is better, and the series connection type realization mode is suitable for occasions with higher THD requirements.
Drawings
Fig. 1 is a circuit schematic diagram of embodiment 1 of the present invention.
Fig. 2 is an equivalent circuit diagram of the embodiments 1 and 2 of the present invention when operating in the motor drive mode.
Fig. 3 is an equivalent circuit diagram of the embodiment 1 of the present invention operating in the three-phase input charging mode.
Fig. 4 is a diagram of DC terminal voltage, power battery terminal voltage and power battery charging current of a three-leg DC/AC converter operating in a three-phase input charging mode according to embodiment 1 of the present invention.
Fig. 5 is a diagram of three-phase input current and a-phase grid voltage when the embodiment 1 of the present invention operates in the three-phase input charging mode.
Fig. 6 is a diagram of three-phase input current THD when embodiment 1 of the present invention operates in a three-phase input charging mode.
Fig. 7 is a diagram showing currents flowing through stator windings of a three-phase motor when embodiment 1 of the present invention is operated in a three-phase input charging mode.
Fig. 8 is an electromagnetic torque diagram of a three-phase motor when the embodiment 1 of the present invention operates in a three-phase input charging mode.
Fig. 9 is a schematic circuit diagram according to embodiment 2 of the present invention.
Fig. 10 is an equivalent circuit diagram of the embodiment 2 of the present invention operating in the three-phase input charging mode.
Fig. 11 is a diagram of DC terminal voltage, power battery terminal voltage and power battery charging current of a three-leg DC/AC converter operating in a three-phase input charging mode according to embodiment 2 of the present invention.
Fig. 12 is a diagram of three-phase input current and a-phase grid voltage when the embodiment 2 of the present invention operates in the three-phase input charging mode.
Fig. 13 is a diagram of three-phase input current THD when embodiment 2 of the present invention operates in a three-phase input charging mode.
Fig. 14 is a diagram of currents flowing through stator windings of a three-phase motor when embodiment 2 of the present invention is operated in a three-phase input charging mode.
Fig. 15 is an electromagnetic torque diagram of a three-phase motor when the embodiment 2 of the present invention operates in a three-phase input charging mode.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Example 1
As shown in fig. 1, the electric vehicle driving and charging integrated circuit based on the single-phase filter inductor provided by this embodiment includes a power battery 1, a bidirectional DC/DC converter 2, a three-bridge arm DC/AC converter 3, a three-phase motor 4, an auxiliary inductor 5, a change-over contact switch 6, a single-contact switch 7, and an AC interface 8; three bridge arms of the three-bridge-arm DC/AC converter 3 are respectively a first bridge arm, a second bridge arm and a third bridge arm; the three-phase motor 4 comprises three stator windings, namely a first stator winding, a second stator winding and a third stator winding, wherein each stator winding is provided with two wiring terminals; the change-over contact switch 6 comprises a common contact and two change-over contacts, namely a first contact b1 and a second contact b 2; the alternating current interface 8 is provided with three connecting terminals, namely a first connecting terminal c1, a second connecting terminal c2 and a third connecting terminal c 3; the positive pole and the negative pole of the low-voltage side of the bidirectional DC/DC converter 2 are respectively connected with the positive pole and the negative pole of the power battery 1, and the positive pole and the negative pole of the high-voltage side of the bidirectional DC/DC converter 2 are respectively connected with the positive pole and the negative pole of the three-bridge-arm DC/AC converter 3; two ends of a first stator winding of the three-phase motor 4 are respectively connected with a first bridge arm midpoint a1 of the three-bridge arm DC/AC converter 3 and a first wiring terminal c1 of the AC interface 8, two ends of a second stator winding of the three-phase motor 4 are respectively connected with a common contact of the change-over contact switch 6 and a second wiring terminal c2 of the AC interface 8, and two ends of a third stator winding of the three-phase motor 4 are respectively connected with a third bridge arm midpoint a3 of the three-bridge arm DC/AC converter 3 and a second wiring terminal c2 of the AC interface 8; three wiring terminals connected with the alternating current interface 8 of the three-phase motor 4 are a group of homonymous terminals, and the other three wiring terminals of the three-phase motor 4 are another group of homonymous terminals; two ends of the auxiliary inductor 5 are respectively connected with a second bridge arm midpoint a2 of the three-bridge arm DC/AC converter 3 and a third connecting terminal c3 of the alternating current interface 8; the first contact b1 and the second contact b2 of the change-over contact switch 6 are respectively connected with the second bridge arm midpoint a2 and the third bridge arm midpoint a3 of the three-bridge arm DC/AC converter 3; two ends of the single-contact switch 7 are respectively connected with a first connection terminal c1 and a second connection terminal c2 of the alternating current interface 8.
The parallel implementation of the circuit is as follows: when the first contact b1 of the change-over contact switch 6 is closed, the second contact b2 is open, and the single-contact switch 7 is closed, the circuit works in a motor driving mode, an equivalent circuit is shown in fig. 2, the principle of the equivalent circuit is consistent with that of a traditional three-phase motor, and the embodiment is not specifically analyzed; when the first contact b1 of the change-over contact switch 6 is open, the second contact b2 is closed, and the single-contact switch 7 is open, the circuit operates in a battery charging mode, in which two of the stator windings of the three-phase motor 4 are connected in parallel.
In the battery charging mode, when the input source is a three-phase grid, three terminals of the ac interface 8 are connected to the grid, and when the input source is a single-phase grid, any two terminals of the ac interface 8 are connected to the grid.
The three-phase motor 4 is a three-phase permanent magnet synchronous motor or a three-phase induction motor with wires led out from two ends of three stator windings.
The torque cancellation principle of the three-phase input charging mode is analyzed, the equivalent circuit is shown in fig. 3, the analysis of the single-phase input condition is similar to the three-phase input, and the details are not repeated in this embodiment.
The three-phase power grid current is:
Figure BDA0002918552980000081
wherein, ImAnd the amplitude of the grid current is shown, and the omegat is the phase of the grid current.
According to the circuit connection mode, the currents of the three stator windings of the three-phase motor 4 can be obtained as follows:
Figure BDA0002918552980000082
the following can be obtained by performing power conversion such as clark on equation (2):
Figure BDA0002918552980000083
wherein the content of the first and second substances,
Figure BDA0002918552980000084
the stator winding current only has an alpha direction component, only can generate a unidirectional pulsating magnetic field, and cannot generate a rotating magnetic field to rotate the rotor, so that the electric automobile can be stopped at a fixed position and is statically charged.
Taking a surface-mounted permanent magnet synchronous motor as an example, the torque thereof is as follows:
Te＝npψfiq＝npψf(-sinθriα+cosθriβ) (4)
wherein n ispIs the number of pole pairs, psi, of the rotorfFor rotor flux linkage iqFor the q-axis current after Park conversion, thetarIs the angle between the d-axis of the rotor and the d-axis of the stator, when thetarWhen 0, TeAt 0, no starting torque is generated.
The simulation test was performed on the parallel implementation three-phase input charging mode in MATLAB/Simulink, and the results are shown in fig. 4 to 8. Setting the DC terminal voltage of a three-bridge arm DC/AC converter 3 to be 800V, the terminal voltage of a power battery 1 to be 400V, and the charging current of the power battery 1 to be 100AFrom fig. 4, it can be seen that the DC terminal voltage U of the three-leg DC/AC converter 3 isdcStabilized at 800V, terminal voltage U of power battery 1bStabilized at 400V, charging current I of power battery 1bThe tracking effect is good when the tracking speed is stabilized at 100A; it can be seen from fig. 5 that the circuit achieves unity power factor; FIG. 6 shows the THD value of the three-phase input current, with small current distortion; it can be seen from fig. 7 that the amplitudes and phases of the three stator winding currents of the three-phase motor 4 are consistent with the theoretical analysis of equation (2); it can be seen from fig. 8 that the electromagnetic torque of the three-phase motor 4 during charging is 0, and torque cancellation is achieved.
Example 2
As shown in fig. 9, the electric vehicle driving and charging integrated circuit based on the single-phase filter inductor provided in this embodiment includes a power battery 1, a bidirectional DC/DC converter 2, a three-bridge arm DC/AC converter 3, a three-phase motor 4, an auxiliary inductor 5, a change-over contact switch 6, a first single-contact switch 7A, a second single-contact switch 7B, and an AC interface 8; three bridge arms of the three-bridge-arm DC/AC converter 3 are respectively a first bridge arm, a second bridge arm and a third bridge arm; the three-phase motor 4 comprises three stator windings, namely a first stator winding, a second stator winding and a third stator winding, wherein each stator winding is provided with two wiring terminals; the change-over contact switch 6 comprises a common contact and two change-over contacts, namely a first contact b1 and a second contact b 2; the alternating current interface 8 is provided with three connecting terminals, namely a first connecting terminal c1, a second connecting terminal c2 and a third connecting terminal c 3; the positive pole and the negative pole of the low-voltage side of the bidirectional DC/DC converter 2 are respectively connected with the positive pole and the negative pole of the power battery 1, and the positive pole and the negative pole of the high-voltage side of the bidirectional DC/DC converter 2 are respectively connected with the positive pole and the negative pole of the three-bridge-arm DC/AC converter 3; two ends of a first stator winding of the three-phase motor 4 are respectively connected with a first bridge arm midpoint a1 of the three-bridge arm DC/AC converter 3 and a first wiring terminal c1 of the AC interface 8, two ends of a second stator winding of the three-phase motor 4 are respectively connected with a common contact of the change-over contact switch 6 and a second wiring terminal c2 of the AC interface 8, and two ends of a third stator winding of the three-phase motor 4 are respectively connected with a third bridge arm midpoint a3 of the three-bridge arm DC/AC converter 3 and a second contact b2 of the change-over contact switch 6; three wiring terminals of the three-phase motor 4, which are connected with the first wiring terminal c1 and the second wiring terminal c2 of the alternating-current interface 8 and the second contact b2 of the change-over contact switch 6, are a group of homonymous terminals, and the other three wiring terminals of the three-phase motor 4 are another group of homonymous terminals; two ends of the auxiliary inductor 5 are respectively connected with a second bridge arm midpoint a2 of the three-bridge arm DC/AC converter 3 and a third connecting terminal c3 of the alternating current interface 8; the first contact b1 of the change-over contact switch 6 is connected with the second bridge arm midpoint a2 of the three-bridge arm DC/AC converter 3; two ends of the first single-contact switch 7A are respectively connected with a first connection terminal c1 and a second connection terminal c2 of the alternating current interface 8; two ends of the second single-contact switch 7B are respectively connected with the second connection terminal c2 of the ac interface 8 and the second contact B2 of the change-over contact switch 6.
The serial implementation of the circuit: when the first contact B1 of the change-over contact switch 6 is closed, the second contact B2 is open, and the first single-contact switch 7A and the second single-contact switch 7B are both closed, the circuit works in a motor driving mode, an equivalent circuit is shown in fig. 2, the principle of the equivalent circuit is consistent with that of a traditional three-phase motor, and the embodiment is not specifically analyzed; when the first contact B1 of the change-over contact switch 6 is open, the second contact B2 is closed, and both the first and second single-contact switches 7A, 7B are open, the circuit operates in a battery charging mode, in which two of the stator windings of the three-phase motor 4 are connected in series.
In the battery charging mode, when the input source is a three-phase grid, three terminals of the ac interface 8 are connected to the grid, and when the input source is a single-phase grid, any two terminals of the ac interface 8 are connected to the grid.
The three-phase motor 4 is a three-phase permanent magnet synchronous motor or a three-phase induction motor with wires led out from two ends of three stator windings.
The torque cancellation principle of the three-phase input charging mode is analyzed, the equivalent circuit is shown in fig. 10, the analysis of the single-phase input condition is similar to the three-phase input, and the description of this embodiment is omitted.
The three-phase power grid current is:
Figure BDA0002918552980000111
according to the circuit connection mode, the currents of the three stator windings of the three-phase motor 4 can be obtained as follows:
Figure BDA0002918552980000112
the following can be obtained by performing power conversion such as clark on equation (6):
Figure BDA0002918552980000113
the stator winding current only has an alpha direction component, only can generate a unidirectional pulsating magnetic field, and cannot generate a rotating magnetic field to rotate the rotor, so that the electric automobile can be stopped at a fixed position and is statically charged.
Taking a surface-mounted permanent magnet synchronous motor as an example, the torque thereof is as follows:
Te＝npψfiq＝npψf(-sinθriα+cosθriβ) (8)
when theta isrWhen equal to 0, TeAt 0, no starting torque is generated.
From equation (3), the parallel implementation iαHas an amplitude of
Figure BDA0002918552980000114
From equation (7), the tandem implementation iαHas an amplitude of
Figure BDA0002918552980000115
The alpha direction current of the serial connection type realization mode is larger, so that the excited pulsating magnetic field is stronger, the inductance value generated on each stator winding is larger, and the filtering effect is better.
Simulation tests were performed on the series implementation three-phase input charging mode in MATLAB/Simulink, with the results shown in fig. 11-15. The DC terminal voltage of the three-leg DC/AC converter 3 is 800V, the terminal voltage of the power battery 1 is 400V, the charging current of the power battery 1 is 100A, and it can be seen from fig. 11 that the DC terminal voltage U of the three-leg DC/AC converter 3 is setdcStabilized at 800V after 0.1s, terminal voltage U of power battery 1bStabilized at 400V, charging current I of power battery 1bThe tracking effect is good when the tracking speed is stabilized at 100A; it can be seen from fig. 12 that the circuit achieves unity power factor; FIG. 13 is a THD value for a three-phase input current, which is smaller than that of FIG. 6, illustrating the better filtering effect of the series implementation; it can be seen from fig. 14 that the amplitudes and phases of the three stator winding currents of the three-phase motor 4 are consistent with the theoretical analysis of equation (6); it can be seen from fig. 15 that the electromagnetic torque of the three-phase motor 4 during charging is 0, and torque cancellation is achieved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (8)

1. Electric automobile drive and integrated circuit that charges based on single-phase filter inductance, its characterized in that: the system comprises a power battery (1), a bidirectional DC/DC converter (2), a three-bridge-arm DC/AC converter (3), a three-phase motor (4), an auxiliary inductor (5), a conversion contact switch (6), a single-contact switch (7) and an alternating current interface (8);
three bridge arms of the three-bridge-arm DC/AC converter (3) are respectively a first bridge arm, a second bridge arm and a third bridge arm; the three-phase motor (4) comprises three stator windings, namely a first stator winding, a second stator winding and a third stator winding, wherein each stator winding is provided with two wiring terminals; the change-over contact switch (6) comprises a common contact and two change-over contacts, namely a first contact (b1) and a second contact (b 2); the alternating current interface (8) is provided with three connecting terminals, namely a first connecting terminal (c1), a second connecting terminal (c2) and a third connecting terminal (c 3);
the positive pole and the negative pole of the low-voltage side of the bidirectional DC/DC converter (2) are respectively connected with the positive pole and the negative pole of the power battery (1), and the positive pole and the negative pole of the high-voltage side of the bidirectional DC/DC converter (2) are respectively connected with the positive pole and the negative pole of the three-bridge-arm DC/AC converter (3);
two ends of a first stator winding of the three-phase motor (4) are respectively connected with a first bridge arm midpoint (a1) of the three-bridge arm DC/AC converter (3) and a first wiring terminal (c1) of the AC interface (8), two ends of a second stator winding of the three-phase motor (4) are respectively connected with a common contact of the transfer contact switch (6) and a second wiring terminal (c2) of the AC interface (8), and two ends of a third stator winding of the three-phase motor (4) are respectively connected with a third bridge arm midpoint (a3) of the three-bridge arm DC/AC converter (3) and a second wiring terminal (c2) of the AC interface (8); three wiring terminals connected with the alternating current interface (8) of the three-phase motor (4) are a group of homonymous terminals, and the other three wiring terminals of the three-phase motor (4) are the other group of homonymous terminals;
two ends of the auxiliary inductor (5) are respectively connected with a second bridge arm midpoint (a2) of the three-bridge arm DC/AC converter (3) and a third connecting terminal (c3) of the alternating current interface (8);
a first contact (b1) and a second contact (b2) of the change-over contact switch (6) are respectively connected with a second bridge arm midpoint (a2) and a third bridge arm midpoint (a3) of the three-bridge arm DC/AC converter (3); two ends of the single-contact switch (7) are respectively connected with a first connecting terminal (c1) and a second connecting terminal (c2) of the alternating current interface (8).
2. The integrated driving and charging circuit for the electric vehicle based on the single-phase filter inductor as claimed in claim 1, wherein when the first contact (b1) of the change-over contact switch (6) is closed, the second contact (b2) is opened, and the single-contact switch (7) is closed, the circuit operates in a motor driving mode; when the first contact (b1) of the change-over contact switch (6) is open, the second contact (b2) is closed and the single-contact switch (7) is open, the circuit operates in a battery charging mode, in which two of the stator windings of the three-phase motor (4) are connected in parallel.
3. The integrated circuit for driving and charging an electric vehicle based on single-phase filter inductance according to claim 2, wherein in the battery charging mode, when the input source is a three-phase grid, three terminals of the alternating current interface (8) are connected with the grid, and when the input source is a single-phase grid, any two terminals of the alternating current interface (8) are connected with the grid.
4. The electric vehicle driving and charging integrated circuit based on the single-phase filter inductor as claimed in claim 1, wherein the three-phase motor (4) is a three-phase permanent magnet synchronous motor or a three-phase induction motor with two ends of three stator windings connected by wires.
5. The electric automobile driving and charging integrated circuit based on the single-phase filter inductor is characterized by comprising a power battery (1), a bidirectional DC/DC converter (2), a three-bridge-arm DC/AC converter (3), a three-phase motor (4), an auxiliary inductor (5), a conversion contact switch (6), a first single-contact switch (7A), a second single-contact switch (7B) and an alternating current interface (8);
three bridge arms of the three-bridge-arm DC/AC converter (3) are respectively a first bridge arm, a second bridge arm and a third bridge arm; the three-phase motor (4) comprises three stator windings, namely a first stator winding, a second stator winding and a third stator winding, wherein each stator winding is provided with two wiring terminals; the change-over contact switch (6) comprises a common contact and two change-over contacts, namely a first contact (b1) and a second contact (b 2); the alternating current interface (8) is provided with three connecting terminals, namely a first connecting terminal (c1), a second connecting terminal (c2) and a third connecting terminal (c 3);
the positive pole and the negative pole of the low-voltage side of the bidirectional DC/DC converter (2) are respectively connected with the positive pole and the negative pole of the power battery (1), and the positive pole and the negative pole of the high-voltage side of the bidirectional DC/DC converter (2) are respectively connected with the positive pole and the negative pole of the three-bridge-arm DC/AC converter (3);
two ends of a first stator winding of the three-phase motor (4) are respectively connected with a first bridge arm midpoint (a1) of the three-bridge arm DC/AC converter (3) and a first wiring terminal (c1) of the AC interface (8), two ends of a second stator winding of the three-phase motor (4) are respectively connected with a common contact of the transfer contact switch (6) and a second wiring terminal (c2) of the AC interface (8), and two ends of a third stator winding of the three-phase motor (4) are respectively connected with a third bridge arm midpoint (a3) of the three-bridge arm DC/AC converter (3) and a second contact (b2) of the transfer contact switch (6); three wiring terminals of the three-phase motor (4), which are connected with a first wiring terminal (c1), a second wiring terminal (c2) and a second contact (b2) of the change-over contact switch (6) of the alternating current interface (8), are a group of homonymous terminals, and the other three wiring terminals of the three-phase motor (4) are another group of homonymous terminals;
two ends of the auxiliary inductor (5) are respectively connected with a second bridge arm midpoint (a2) of the three-bridge arm DC/AC converter (3) and a third connecting terminal (c3) of the alternating current interface (8);
a first contact (b1) of the change-over contact switch (6) is connected with a second bridge arm midpoint (a2) of the three-bridge arm DC/AC converter (3); two ends of the first single-contact switch (7A) are respectively connected with a first connection terminal (c1) and a second connection terminal (c2) of the alternating current interface (8); and two ends of the second single-contact switch (7B) are respectively connected with a second connection terminal (c2) of the alternating current interface (8) and a second contact (B2) of the change-over contact switch (6).
6. The integrated driving and charging circuit for the electric vehicle based on the single-phase filter inductor as claimed in claim 5, wherein when the first contact (B1) of the change-over contact switch (6) is closed, the second contact (B2) is opened, and the first and second single-contact switches (7A, 7B) are both closed, the circuit operates in a motor driving mode; when the first contact (B1) of the change-over contact switch (6) is opened, the second contact (B2) is closed, and the first and second single-contact switches (7A) and (7B) are both opened, the circuit works in a battery charging mode, wherein two stator windings of the three-phase motor (4) are connected in series.
7. The integrated circuit for driving and charging an electric vehicle based on single-phase filter inductance according to claim 6, wherein in the battery charging mode, when the input source is a three-phase grid, three terminals of the AC interface (8) are connected with the grid, and when the input source is a single-phase grid, any two terminals of the AC interface (8) are connected with the grid.
8. The electric vehicle driving and charging integrated circuit based on the single-phase filter inductor as claimed in claim 5, wherein the three-phase motor (4) is a three-phase permanent magnet synchronous motor or a three-phase induction motor with two ends of three stator windings connected by wires.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11187683A (en) * 1997-12-24 1999-07-09 Sony Corp Motor start controller
US6339301B1 (en) * 2000-10-02 2002-01-15 Errol E. Wallingford AC motor control for a vehicle having a multi-speed transmission—II
FR2823384A1 (en) * 2001-04-09 2002-10-11 Renault Sas Electronic actuator for robotic all electric gear box, use H type transistor bridge with actuators in series or parallel across bridge center
CN108123491A (en) * 2017-11-24 2018-06-05 南京航空航天大学 A kind of highly integrated motor driving and charge and discharge electric appliance integration topology
CN109361255A (en) * 2018-10-19 2019-02-19 南京航空航天大学 A kind of charge-discharge circuit topology based on machine winding open circuit
CN109687722A (en) * 2019-02-01 2019-04-26 华南理工大学 A kind of integrated multi-mode power converter for electric vehicle and its control method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11187683A (en) * 1997-12-24 1999-07-09 Sony Corp Motor start controller
US6339301B1 (en) * 2000-10-02 2002-01-15 Errol E. Wallingford AC motor control for a vehicle having a multi-speed transmission—II
FR2823384A1 (en) * 2001-04-09 2002-10-11 Renault Sas Electronic actuator for robotic all electric gear box, use H type transistor bridge with actuators in series or parallel across bridge center
CN108123491A (en) * 2017-11-24 2018-06-05 南京航空航天大学 A kind of highly integrated motor driving and charge and discharge electric appliance integration topology
CN109361255A (en) * 2018-10-19 2019-02-19 南京航空航天大学 A kind of charge-discharge circuit topology based on machine winding open circuit
CN109687722A (en) * 2019-02-01 2019-04-26 华南理工大学 A kind of integrated multi-mode power converter for electric vehicle and its control method

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