CN112389230A - Energy conversion device and vehicle - Google Patents

Energy conversion device and vehicle Download PDF

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Publication number
CN112389230A
CN112389230A CN201910755479.2A CN201910755479A CN112389230A CN 112389230 A CN112389230 A CN 112389230A CN 201910755479 A CN201910755479 A CN 201910755479A CN 112389230 A CN112389230 A CN 112389230A
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CN
China
Prior art keywords
direct current
switch
winding unit
energy conversion
conversion device
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Granted
Application number
CN201910755479.2A
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Chinese (zh)
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CN112389230B (en
Inventor
凌和平
李吉成
潘华
黄日
杨宁
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN201910755479.2A priority Critical patent/CN112389230B/en
Publication of CN112389230A publication Critical patent/CN112389230A/en
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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
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides an energy conversion device and a vehicle, and the energy conversion device comprises a reversible PWM rectifier and a motor coil, wherein the motor coil comprises at least two sets of winding units, each set of winding is connected with the reversible PWM rectifier, an external first direct current port forms a direct current charging circuit or a direct current discharging circuit with an external battery through the energy conversion device, and the external battery forms a driving circuit with the reversible PWM rectifier and the motor coil in the energy conversion device; the driving circuit drives the motor to output power, and the direct current discharging circuit or the direct current charging circuit discharges or receives charging to the outside, so that the charging of the direct current power supply equipment is received when the external battery electric quantity is insufficient, and the discharging is performed on the direct current power equipment when the external battery electric quantity is sufficient.

Description

Energy conversion device and vehicle
Technical Field
The application relates to the technical field of vehicles, in particular to an energy conversion device and a vehicle.
Background
With the continuous popularization of electric vehicles, more and more electric vehicles enter the society and families, great convenience is brought to people going out, relevant subsidy policies built for charging stations in various regions are planned and even come out, and the quantity and distribution range of charging infrastructure are greatly improved. However, due to the limitation of the driving range of the pure electric vehicle, the vehicle user is very concerned about the problem that the vehicle is anchored due to the exhaustion of the power supply. Although many vehicle manufacturing enterprises remind the vehicle driver of the information of the remaining battery capacity and the warning information of the low battery capacity through a vehicle meter or other methods, the situation that the remaining battery capacity of the vehicle cannot meet the requirement of driving the vehicle to a charging facility position or the situation that the vehicle is exhausted by the driver unconsciously can occur inevitably.
In order to avoid the problem that the experience of a vehicle user on the use of the pure electric vehicle is influenced, and even the use and popularization of the pure electric vehicle are influenced, it is necessary to develop a technology for charging the vehicle by using the mobile charging equipment, and the requirement that the vehicle supplements electric energy to the vehicle under the condition that the electric quantity is exhausted or the electric quantity is low until the vehicle energy storage device does not output any more is met.
Disclosure of Invention
An object of the present application is to provide an energy conversion device and a vehicle, which can discharge electric equipment and receive charging of charging equipment.
The present application is achieved in this way, in a first aspect, there is provided an energy conversion apparatus, comprising a reversible PWM rectifier and a motor coil, wherein the motor coil comprises at least two sets of winding units, and each set of winding is connected to the reversible PWM rectifier;
the external first direct current port forms a direct current charging circuit or a direct current discharging circuit with an external battery through the energy conversion device, and the external battery forms a driving circuit with the reversible PWM rectifier and the motor coil in the energy conversion device; the reversible PWM rectifier further comprises a first bus end and a second bus end, the first end of the external first direct current port is connected with a neutral line led out by at least one set of winding units of the motor coil, the second end of the external first direct current port is connected with the second bus end, the positive end of the external battery is connected with the first bus end, and the negative end of the external battery is connected with the second bus end.
A second aspect of the present application provides an energy conversion apparatus, comprising:
an energy storage connection comprising a first energy storage connection and a second storage connection;
a first bus end of the reversible PWM rectifier is connected with the first energy storage connecting end, and a second bus end of the reversible PWM rectifier is connected with the second energy storage connecting end;
the motor comprises a plurality of sets of winding units, and the motor coil is connected with the reversible PWM rectifier;
and the charging connection end group comprises a first charging connection end and a second charging connection end, the first charging connection end is connected with at least one set of winding unit of the motor coil, and the second charging connection end is connected with the second confluence end.
A third aspect of the present application provides a vehicle further including the energy conversion apparatus provided in the first aspect or the second aspect.
The application provides an energy conversion device and vehicle's technical effect lies in: by adopting the energy conversion device comprising the reversible PWM rectifier and the motor coil, the energy conversion device works in a driving mode, a direct current charging mode and a direct current discharging mode, when the energy conversion device works in the driving mode, an external battery and the reversible PWM rectifier and the motor coil in the energy conversion device form a driving circuit, when the energy conversion device works in the charging mode, an external first direct current port forms a direct current charging circuit with the external battery through the energy conversion device, when the energy conversion device works in the discharging mode, the external battery forms a direct current discharging circuit with the external first direct current port through the energy conversion device, the driving circuit drives the motor to output power, and the direct current power supply device is discharged or charged through the direct current discharging circuit or the direct current charging circuit, so that the charging of the direct current power supply device is received when the external battery is insufficient, and the direct current power utilization device is discharged when the external battery is sufficient, and motor coils are adopted in the driving circuit, the direct current charging loop and the direct current discharging loop, so that the circuit structure is simplified, the integration level is improved, the purposes of volume reduction and cost reduction are achieved, and the problems that the existing overall control circuit comprising the battery charging circuit and the motor driving circuit is complex in structure, low in integration level, large in size and high in cost are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 2 is another schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 3 is another schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 4 is another schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 5 is another schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 6 is another schematic structural diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electric machine in an energy conversion device according to an embodiment of the present application;
fig. 8 is a circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 9 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 10 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 11 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 12 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 13 is another circuit diagram of an energy conversion device according to an embodiment of the present disclosure;
fig. 14 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 15 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 16 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 17 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 18 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 19 is another circuit diagram of an energy conversion device according to an embodiment of the present application;
fig. 20 is a current flow diagram of an energy conversion device according to an embodiment of the present application;
fig. 21 is another current flow diagram of an energy conversion device provided in an embodiment of the present application;
fig. 22 is another current flow diagram of an energy conversion device provided in accordance with an embodiment of the present application;
fig. 23 is another current flow diagram of an energy conversion device provided in accordance with an embodiment of the present application;
fig. 24 is another current flow diagram of an energy conversion device provided in accordance with an embodiment of the present application;
fig. 25 is another current flow diagram of an energy conversion device provided in accordance with an embodiment of the present application;
fig. 26 is a schematic structural diagram of an energy conversion device according to a second embodiment of the present application;
fig. 27 is a schematic structural diagram of a vehicle according to a third embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to explain the technical means of the present application, the following description will be given by way of specific examples.
An energy conversion device is provided in an embodiment of the present application, as shown in fig. 1, and includes a reversible PWM rectifier 102 and a motor coil 103, where the motor coil 103 includes at least two sets of winding units, and each set of winding is connected to the reversible PWM rectifier 102;
the external first direct current port forms a direct current charging circuit or a direct current discharging circuit with an external battery 101 through the energy conversion device, and the external battery 101 forms a driving circuit with a reversible PWM rectifier 102 and a motor coil 103 in the energy conversion device; the reversible PWM rectifier 102 further includes a first bus terminal and a second bus terminal, a first terminal of the external first dc port is connected to a neutral line led out from at least one set of winding units of the motor coil 103, a second terminal of the external first dc port is connected to the second bus terminal, a positive terminal of the external battery 101 is connected to the first bus terminal, and a negative terminal of the external battery 101 is connected to the second bus terminal.
The motor can be a synchronous motor (including a brushless synchronous motor) or an asynchronous motor, the number of phases of the motor coil 103 is more than or equal to 2 (such as a three-phase motor, a five-phase motor, a six-phase motor, a nine-phase motor, a fifteen-phase motor and the like), the neutral line led out from the neutral point is formed by the connection points of the motor coil 103, the neutral line of the motor coil 103 can be led out by a plurality of numbers, the number of the connection points of the specific motor coil 103 depends on the winding parallel structure in the motor, and the number of the parallel connection points of the motor coil 103 in the motor and the number of the neutral line led out from the neutral point formed by the connection points are; the reversible PWM rectifier 102 comprises a multi-phase bridge arm, the number of the bridge arms is configured according to the number of phases of the motor, each phase of inverter bridge arm comprises two power switch units, the power switch units can be of the types of transistors, IGBTs, MOSFET tubes, SiC tubes and other devices, the connection point of the two power switch units in the bridge arm is connected with one phase coil in the motor, and the power switch units in the reversible PWM rectifier 102 can be switched on and off according to an external control signal; the energy conversion device further comprises a control module, the control module is respectively connected with the reversible PWM rectifier 102 and sends a control signal to the reversible PWM rectifier 102, the control module CAN comprise a vehicle control unit, a control circuit of the reversible PWM rectifier 102 and a BMS battery manager circuit, the control module, the reversible PWM rectifier 102 and the BMS battery manager circuit are connected through a CAN line, and different modules in the control module control the conduction and the disconnection of a power switch unit in the reversible PWM rectifier 102 according to the acquired information so as to realize the conduction of different current loops.
Wherein, this energy conversion device can work in drive mode, direct current charge mode and direct current discharge mode:
when the energy conversion device works in a driving mode, an external battery 101, a reversible PWM rectifier 102 and a motor coil 103 in the energy conversion device form a driving circuit, the external battery 101 supplies direct current to the reversible PWM rectifier 102, the reversible PWM rectifier 102 inverts the direct current into three-phase alternating current, and the three-phase alternating current is input to the motor coil 103 to drive the motor to run.
When the energy conversion device works in a direct current charging mode, the external first direct current port, the energy conversion device and the external battery 101 form a direct current charging circuit, the external charging and discharging port is connected with a direct current power supply device and provides a direct current power supply for the direct current charging circuit, when the energy conversion device works in a direct current discharging mode, the external charging and discharging port, the energy conversion device and the external battery 101 form a direct current discharging circuit, the external charging and discharging port is connected with a direct current electric device, and the direct current discharging circuit provides the direct current power supply for the direct current electric device.
The technical effect of the energy conversion device in the embodiment of the application is as follows: by adopting the energy conversion device comprising the reversible PWM rectifier 102 and the motor coil 103, the energy conversion device is enabled to work in a driving mode, a DC charging mode and a DC discharging mode, when the energy conversion device works in the driving mode, the external battery 101, the reversible PWM rectifier 102 and the first winding unit in the energy conversion device form a driving circuit, when the energy conversion device works in the charging mode, the external first DC port forms a DC charging circuit with the external battery 101 through the energy conversion device, when the energy conversion device works in the discharging mode, the external battery 101 forms a DC discharging circuit with the external first DC port through the energy conversion device, the driving circuit drives the motor to output power, and the DC discharging circuit or the DC charging circuit discharges or receives and charges the external battery 101, so that the charging of the DC power supply equipment is received when the external battery 101 is insufficient in charge, and when the electric quantity of the external battery 101 is sufficient, discharging is carried out on the direct current electric equipment, and the motor coil 103 is adopted in the driving circuit, the direct current charging loop and the direct current discharging loop, so that the circuit structure is simplified, the integration level is improved, the purposes of volume reduction and cost reduction are achieved, and the problems that the existing overall control circuit comprising the battery 101 charging circuit and the motor driving circuit is complex in structure, low in integration level, large in size and high in cost are solved.
As an embodiment, as shown in fig. 2, the energy conversion device further includes a first switch 105, the motor coil 103 includes a first winding unit and a second winding unit, the first winding unit is connected to the reversible PWM rectifier 102, the second winding unit is connected to the reversible PWM rectifier 102, the first winding unit leads out a first neutral line, and the first neutral line is connected to a first end of the external first dc port through the first switch 105.
Part of or all of the coil branches of the motor coil 103 at least form a first winding unit and a second winding unit, the first winding unit includes at least two phase endpoints and at least one neutral point, one neutral point leads out a first neutral line, the second winding unit includes at least two phase endpoints and at least one neutral point, one neutral point leads out a second neutral line, the first winding unit and the second winding unit have different phase endpoints, the first winding unit and the second winding unit are connected with the reversible PWM rectifier 102 through the phase endpoints, the first neutral line of the first winding unit is connected with an external first direct current port through a first switch 105, and the second winding unit is in a suspended state.
In this embodiment, the motor coil 103 is divided into the first winding unit and the second winding unit, so that the energy conversion device can form different charging and discharging loops with the external battery 101 and the external first dc port through the first winding unit and the second winding unit, thereby increasing the number of charging and discharging circuits, and further realizing different functions.
When the external first dc port is connected to the dc power supply device, the first switch 105, the first winding unit, the reversible PWM rectifier 102, and the external battery 101 form a first dc charging circuit.
In the charging mode, the direct current supply device, the first switch 105, the first winding unit, the reversible PWM rectifier 102 and the external battery 101 form a first direct current charging circuit, the direct current supply device, the first switch 105, the first winding unit and the reversible PWM rectifier 102 form a first direct current charging energy storage loop, and the direct current supply device, the first switch 105, the first winding unit and the reversible PWM rectifier 102 form a first direct current charging energy storage release loop; in the working process of the first direct current charging energy storage loop, the direct current power supply equipment outputs electric energy to the first direct current charging energy storage loop to store the electric energy in the first winding unit, in the working process of the first direct current charging energy storage release loop, the direct current power supply equipment and the first winding unit charge the external battery 101 through the energy storage release loop together, the first direct current charging energy storage loop and the first direct current charging energy storage release loop can work alternately by sending a PWM control signal to the reversible PWM rectifier 102, and the process that the direct current power supply equipment charges the external battery 101 through the first direct current charging circuit is further realized.
When the external first dc port is connected to the dc power device, the external battery 101, the reversible PWM rectifier 102, the first winding unit, the first switch 105, and the dc power device form a first dc discharge circuit.
In the direct current discharging mode, the external battery 101, the reversible PWM rectifier 102, the first winding unit, the first switch 105 and the external direct current port form a first direct current discharging circuit, in the discharging mode, the external direct current port is connected with the direct current electric equipment, the external battery 101 provides direct current power for the direct current electric equipment through the first direct current discharging circuit, the external battery 101, the reversible PWM rectifier 102, the first winding unit, the first switch 105 and the direct current electric equipment form a first direct current discharging energy storing loop, the first winding unit, the first switch 105, the direct current electric equipment and the reversible PWM rectifier 102 form a first direct current discharging energy storing and releasing loop, the first direct current discharging circuit comprises a first direct current discharging energy storing loop and a first direct current discharging energy storing and releasing loop, in the working process of the first direct current discharging energy storing loop, the external battery 101 outputs electric energy to the first direct current discharging energy storing loop and stores the electric energy in the first winding unit, in the working process of the first direct-current discharging energy-storing releasing loop, the first winding unit discharges for the direct-current electric equipment through the first direct-current discharging energy-storing releasing loop, and the process that the external battery 101 discharges for the direct-current electric equipment through the first direct-current discharging circuit is achieved.
The external battery 101, the reversible PWM rectifier 102, the first winding unit, the first switch 105 and the dc electric device form a first dc charging circuit, and the external battery 101, the reversible PWM rectifier 102, the first winding unit, the first switch 105 and the external dc port form a first dc discharging circuit, so that the charging of the dc electric device is received by the first dc charging circuit when the external battery 101 is insufficient in power, and the discharging of the dc electric device is performed by the first dc discharging circuit when the external battery 101 is sufficient in power.
As an embodiment, as shown in fig. 3, the energy conversion device further includes a first switch 105, the motor coil 103 includes a first winding unit and a second winding unit, the first winding unit is connected to the reversible PWM rectifier 102, the second winding unit is connected to the reversible PWM rectifier 102, the first winding unit leads out a first neutral line, the second winding unit leads out a second neutral line, and the second neutral line is connected to the first end of the external first dc port through the first switch 105.
When the external first dc port is connected to the dc power supply device, the first switch 105, the second winding unit, the reversible PWM rectifier 102, and the external battery 101 form a second dc charging circuit.
In the charging mode, the direct current supply device provides a direct current power supply for the direct current charging circuit, the direct current supply device, the first switch 105, the second winding unit, the reversible PWM rectifier 102 form a second direct current charging energy storage loop, and the direct current supply device, the first switch 105, the second winding unit, the reversible PWM rectifier 102 form a second direct current charging energy storage release loop with the external battery 101; in the working process of the second direct current charging energy storage loop, the direct current power supply equipment outputs electric energy to the second direct current charging energy storage loop to store the electric energy in the second winding unit, in the working process of the second direct current charging energy storage release loop, the direct current power supply equipment and the second winding unit charge the external battery 101 through the second direct current charging energy storage release loop together, the second direct current charging energy storage loop and the second direct current charging energy storage release loop can work alternately by sending a PWM control signal to the reversible PWM rectifier 102, and therefore the process that the direct current power supply equipment charges the external battery 101 through the second direct current charging circuit is achieved.
In one embodiment, when the dc power device is connected to the external first dc port, the external battery 101, the reversible PWM rectifier 102, the second winding unit, the first switch 105, and the dc power device form a second dc discharge circuit.
In the direct current discharging mode, a first direct current discharging circuit is formed by the external battery 101, the reversible PWM rectifier 102, the second winding unit, the first switch 105 and the external direct current port, in the discharging mode, the external direct current port is connected with the direct current electric equipment, the external battery 101 provides direct current power for the direct current electric equipment through a second direct current discharging circuit, the external battery 101, the reversible PWM rectifier 102, the second winding unit, the first switch 105 and the direct current electric equipment form a second direct current discharging energy storage loop, the second winding unit, the first switch 105, the direct current electric equipment and the reversible PWM rectifier 102 form a second direct current discharging energy storage and release loop, the second direct current discharging circuit comprises a second direct current discharging energy storage loop and a second direct current discharging energy storage and release loop, in the working process of the second direct current discharging energy storage loop, the external battery 101 outputs electric energy to the second direct current discharging energy storage loop and stores the electric energy in the second winding unit, in the working process of the second direct-current discharging energy storage and release circuit, the second winding unit discharges for the direct-current electric equipment through the second direct-current discharging energy storage and release circuit, and the process that the external battery 101 discharges for the direct-current electric equipment through the second direct-current discharging circuit is achieved.
In the above embodiment, the external battery 101, the reversible PWM rectifier 102, the second winding unit, the first switch 105 and the dc electric device form a second dc charging circuit, and the external battery 101, the reversible PWM rectifier 102, the second winding unit, the first switch 105 and the external dc port form a second dc discharging circuit, so that the charging of the dc electric device by the second dc charging circuit is received when the external battery 101 is insufficient in electric quantity, and the discharging of the dc electric device by the second dc discharging circuit is performed when the external battery 101 is sufficient in electric quantity.
As an embodiment, as shown in fig. 4, the energy conversion device further includes a first switch 105, the motor coil 103 includes a first winding unit and a second winding unit, the first winding unit is connected to the reversible PWM rectifier 102, the second winding unit is connected to the reversible PWM rectifier 102, the first winding unit leads out a first neutral line, the second winding unit leads out a second neutral line, and the first neutral line and the second neutral line are connected in common and then connected to a first end of the external first dc port through the first switch 105.
The present embodiment is different from the above-described embodiments in that: the first winding unit and the second winding unit are connected with the first switch 105 at the same time, when the first switch 105 is controlled to be conducted, the first winding unit and the second winding unit are connected into the direct current charging circuit and the direct current discharging circuit at the same time, and the first winding unit and the second winding unit are connected into the circuit in parallel, so that the current conducting capacity in the charging and discharging processes of the direct current charging circuit and the direct current discharging circuit is increased.
As an embodiment, as shown in fig. 5, the energy conversion device further includes a first switch 105 and a second switch 106, the motor coil 103 includes a first winding unit and a second winding unit, the first winding unit is connected to the reversible PWM rectifier 102, the second winding unit leads out a second neutral line, the first neutral line is connected to the first end of the external first dc port through the first switch 105, and the second neutral line is connected to the first end of the external first dc port through the second switch 106.
In this embodiment, compared to the above-mentioned embodiments, two switches, a first switch 105 and a second switch 106 are provided and connected to the first winding unit and the second winding unit, respectively, when the dc power supply apparatus is connected to the first dc port, the dc power supply apparatus, the first switch 105, the first winding unit, the reversible PWM rectifier 102 and the external battery 101 form a first dc charging circuit, when the dc power supply apparatus is connected to the first dc port, the dc power supply apparatus, the second switch 106, the second winding unit, the reversible PWM rectifier 102 and the external battery 101 form a third dc charging circuit, when the first dc port is connected to the dc power supply apparatus, the first dc charging circuit, the third dc charging circuit, or the first dc charging circuit and the third dc charging circuit are operated simultaneously, when the dc power supply apparatus is connected to the first dc port, the external battery 101, the reversible PWM rectifier 102, the first winding unit, the reversible PWM rectifier 102, the reversible dc charging circuit, the reversible PWM rectifier, The first switch 105 and the external direct current port form a first direct current discharge circuit, the external battery 101, the reversible PWM rectifier 102, the second winding unit, the second switch 106 and the external direct current port form a third direct current discharge circuit, and the first switch 105 and the second switch 106 can be controlled to realize the operation of the first direct current discharge circuit and the operation of the third direct current discharge circuit or the simultaneous operation of the first direct current discharge circuit and the third direct current discharge circuit.
As an embodiment, in addition to the above embodiment, the energy conversion device includes a first inductor, a first end of the first switch 105 is connected to the first neutral line, a first end of the second switch 106 is connected to the second neutral line, a second end of the first switch 105 and a second end of the second switch 106 are connected to the first end of the first inductor after being connected in common, and a second end of the second inductor is connected to a first end of the external first dc port.
In this embodiment, by increasing the first inductor, no matter the first switch 105 or the second switch 106 is controlled to be turned on, the inductance in the charging and discharging circuit during the charging and discharging process can be increased, and further, the energy value stored in the energy storage loop can be increased, so that the large-current charging and discharging of the charging and discharging circuit during the charging and discharging process can be realized.
As an embodiment, the energy conversion device includes a second inductor and a third inductor, a first terminal of the first switch 105 is connected to the first neutral line, a second terminal of the first switch 105 is connected to a first terminal of the second inductor, a first terminal of the second switch 106 is connected to the second neutral line, a second terminal of the second switch 106 is connected to a first terminal of the second inductor, and a second terminal of the first inductor and a second terminal of the second inductor are connected in common and then connected to a first terminal of the external first dc port.
Compared with the previous embodiment, when the first switch 105 and the second switch 106 are turned on simultaneously, the inductance in the charge and discharge circuit during the charge and discharge process is further increased, and the energy value stored in the energy storage loop is further increased, so that the large-current charge and discharge of the charge and discharge circuit during the charge and discharge process can be realized.
As an implementation manner, the energy conversion apparatus further includes a first switch 105 module, a second switch 106 module, a third switch module, and a first capacitor, a positive terminal and a negative terminal of the external battery 101 are respectively connected to a first terminal and a second terminal of the first switch 105 module, a third terminal of the first switch 105 module is connected to a first terminal and a first bus terminal of the first capacitor, a fourth terminal of the first switch 105 module is connected to a second terminal and a second bus terminal of the first capacitor, a first terminal of the second switch 106 module is connected to the second switch 106, a second terminal of the second switch 106 module is connected to the second bus terminal, a third terminal and a fourth terminal of the second switch 106 module are respectively connected to a first terminal and a second terminal of the first dc port, and the external second dc port 110 is connected to the first bus terminal and the second bus terminal through the third switch module.
The first switch 105 module includes a third switch, a fourth switch, a resistor, and a fifth switch, a positive terminal of the external battery 101 is connected to a first terminal of the third switch and a first terminal of the fourth switch, a second terminal of the third switch is connected to a first terminal of the first capacitor and a first terminal of the first inductor, a second terminal of the fourth switch is connected to a first terminal of the resistor, a second terminal of the resistor is connected to a first terminal of the third capacitor, a negative terminal of the external battery 101 is connected to a first terminal of the fifth switch, and a second terminal of the fifth switch is connected to a second terminal of the third capacitor and a second terminal of the first capacitor.
This embodiment has increased a branch road, is equipped with fourth switch and resistance on this branch road, and this branch road is used for realizing that outside battery 101 charges in advance to first energy storage module, switches on the fourth switch earlier promptly and makes outside battery 101 charge to first electric capacity, owing to set up resistance, can control the electric current size of precharging, controls the third switch after the completion of precharging switches on again, controls the fourth switch again and turns off the switch.
The technical effects of the embodiment are as follows: through set up the branch road that is used for carrying on the precharge in first switch 105 module, realized the control of the charging current of outside battery 101 output to first electric capacity, reduce the impact current when the energy storage module is electrified, promoted the charging safety and the life of first electric capacity of outside battery 101 and first electric capacity in the charging process.
The second switch 106 module includes a sixth switch, a seventh switch and a second capacitor, a first end of the sixth switch and a first end of the second capacitor are connected in common and constitute a first end of the second switch 106 module, a second end of the second capacitor and a first end of the seventh switch are connected in common and constitute a second end of the second switch 106 module, a second end of the sixth switch is a third end of the second switch 106 module, and a second end of the seventh switch is a fourth end of the second switch 106 module.
In this embodiment, by providing the second capacitor, the voltage values of the dc power consumption device and the dc discharge device connected to the external dc charge/discharge port can be obtained according to the second capacitor, and the connection or disconnection between the energy conversion device and the external dc charge/discharge port can be realized by controlling the connection or disconnection of the sixth switch and the seventh switch.
The second switch 106 module includes a sixth switch and a second capacitor, a first end of the second capacitor is a first end and a third end of the second switch 106 module, a second end of the sixth switch and a first end of the second capacitor are connected in common and form a second end of the second switch 106 module, and a second end of the sixth switch is a fourth end of the switch module.
Compared with the previous embodiment, the embodiment reduces the number of sixth switches, can achieve the same effect through one fifth switch, and saves the cost of the whole device.
The third switch module comprises an eighth switch and a ninth switch, the first end and the second end of the eighth switch are respectively the first end and the third end of the third switch module, and the first end and the second end of the ninth switch are respectively the second end and the fourth end of the third switch module.
In the above embodiment, the first switch 105 module is controlled to enable the external battery 101 to be connected to and disconnected from the energy conversion device, the second switch 106 module is controlled to enable the first dc charging port to be connected to and disconnected from the energy conversion device, the third switch module is controlled to enable the second dc charging port to be connected to and disconnected from the energy conversion device, and the first switch 105 module, the second switch 106 module and the third switch module are controlled to enable different charging and discharging loops to work.
As an embodiment, the energy conversion device further includes a first switch 105 and a second switch 106, the motor coil 103 includes a first winding unit and a second winding unit, the first winding unit is connected to the reversible PWM rectifier 102, the second winding unit leads out a second neutral line, the first neutral line is connected to the first end of the external first dc port through the first switch 105, and the second neutral line is connected to the first end of the external first dc port through the second switch 106.
When the external first direct current port is connected with first direct current power supply equipment, the first direct current power supply equipment and an external battery 101 form a first direct current charging circuit through a motor coil 103 and a reversible PWM rectifier 102 in the energy conversion device;
when the external second dc port 110 is connected to the second dc power supply device, the second dc power supply device forms a third dc charging circuit with the external battery 101 through the motor coil 103 and the reversible PWM rectifier 102 in the energy conversion device;
the energy conversion device selects the first direct current charging circuit or the third direct current charging circuit to work according to an external control signal;
or the energy conversion device selects the first direct current charging circuit and the third direct current charging circuit to work simultaneously or in a time-staggered mode according to an external control signal.
The energy conversion device selects the first direct current charging circuit to work or the third direct current charging circuit to work or the first direct current charging circuit and the third direct current charging circuit to work simultaneously according to the external control signal, which means that the energy conversion device selects the first direct current charging circuit and the third direct current charging circuit to work and the first direct current charging circuit and the third direct current charging circuit to work simultaneously by controlling the reversible PWM rectifier 102 according to the external control signal.
Figure BDA0002168572000000141
TABLE 1
As shown in table 1, the first embodiment, which is implemented by controlling the reversible PWM rectifier 102 to select the first dc charging circuit to operate according to the external control signal, includes:
in the first case, the energy conversion device controls the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 to be turned on to operate the first dc charging circuit in the same phase according to the external control signal, and controls the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 to be turned off to stop the third dc charging circuit from operating.
In the second case, the energy conversion device controls the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 to be turned on to operate the first dc charging circuit according to the external control signal, and controls the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 to be turned off to stop the third dc charging circuit.
The second embodiment is that the energy conversion device realizes the selection of the third dc charging circuit operation by controlling the reversible PWM rectifier 102 according to the external control signal, and includes:
in the third situation, the energy conversion device controls the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 to be turned on in phase according to the external control signal, so that the third dc charging circuit operates, and controls the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to be turned off, so that the first dc charging circuit stops operating.
In the fourth situation, the energy conversion device controls the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 to be turned on to enable the second dc charging circuit to operate according to the external control signal phase error, and controls the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to be turned off to enable the first dc charging circuit to stop operating.
In the four cases, synchronous control, namely synchronous on and synchronous off, can be performed on the bridge arms in the reversible PWM rectifier 102, so that the current of the motor is simultaneously increased when the motor is synchronously turned on and simultaneously decreased when the motor is synchronously turned off, and the current of the motor tends to be equal at any moment, so that the synthetic magnetomotive force of the motor tends to be zero, the magnetic field of the stator tends to be zero, and the motor basically has no torque. When the inductance of the motor does not meet the ripple requirement, the bridge arms in the reversible PWM rectifier 102 may be subjected to phase-staggered control, where the staggered angle is 360/motor phase, for example, the three-phase bridge arms are staggered by about 120 degrees in phase control, so that positive and negative ripples of the three-phase coil are mutually overlapped and mutually offset, and thus the total ripple is greatly reduced, for example, the two-phase is staggered by about 180 degrees in phase control, so that positive and negative ripples of the two-phase coil are mutually overlapped and mutually offset, so that the total ripple is greatly reduced, but there may be a certain torque ripple.
Figure BDA0002168572000000151
Figure BDA0002168572000000161
TABLE 2
The third embodiment is to control the reversible PWM rectifier 102 to make the first dc charging circuit and the third dc charging circuit operate simultaneously, and includes the following 8 cases:
in the fifth case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 in phase according to the external control signal, so that the first dc charging circuit and the third dc charging circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in phase;
in the sixth case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 in phase according to the external control signal, so that the first dc charging circuit and the third dc charging circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in phase-shifted manner;
in a seventh case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 in phase according to the external control signal, so that the first dc charging circuit and the third dc charging circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in phase, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in a phase-shifted manner;
in the eighth case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 in phase according to the external control signal, so that the first dc charging circuit and the third dc charging circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in a phase-staggered manner;
in the ninth case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 in a phase-staggered manner according to the external control signal, so that the first dc charging circuit and the third dc charging circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in phase;
in the tenth case, the energy conversion device controls the bridge arm connected with the first winding unit and the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error to enable the first dc charging circuit and the third dc charging circuit to operate simultaneously, and enables the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to be conducted in phase error and enables the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to be conducted in phase;
in the eleventh case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error so that the first dc charging circuit and the third dc charging circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in phase error;
in a twelfth case, the energy conversion device controls the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error to enable the first dc charging circuit and the third dc charging circuit to operate simultaneously, and enables the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 to be conducted in a phase error manner and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 to be conducted in a phase error manner.
In the above eight cases, the reversible PWM rectifier 102 may be controlled by in-phase control, or by phase-staggered control, that is, by a certain angle, for example, the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 are staggered by 180 degrees or 90 degrees, preferably 180 degrees; the bridge arm switch corresponding to each winding unit can adopt in-phase control and staggered phase control respectively.
The technical effects of the embodiment are as follows: when an external charging port is connected with a direct current power supply device, a first direct current charging circuit is formed by the direct current power supply device, the reversible PWM rectifier 102, the first winding unit and the external battery 101, a third direct current charging circuit is formed by the direct current power supply device, the reversible PWM rectifier 102, the second winding unit and the external battery 101, the first direct current charging circuit or the third direct current charging circuit can be selected to work according to different requirements, or the first direct current charging circuit and the third direct current charging circuit work simultaneously, when the first direct current charging circuit and the third direct current charging circuit are used simultaneously, the equivalent inductance of a motor winding during use is increased, the charging and discharging ripple is small, the control mode is simple, the inductance is omitted, the quality of an external controller is saved, the multi-dimensional multiplexing of the motor is realized, and the integration level is high.
In addition, the same phase or staggered phase control can be adopted between the multi-phase bridge arms of the reversible PWM rectifier 102 in the first direct current charging circuit and the second direct current charging circuit, the same phase control means controlling the multi-phase bridge arms to be conducted simultaneously, the staggered phase control means controlling the multi-phase bridge arms to be conducted in a staggered mode, and keeping the periods consistent, when the same phase control is adopted, the current of each phase winding of the motor is basically consistent, the synthesized magnetic field intensity generated by all windings of the same-phase motor is basically zero, the risk of demagnetization of a motor rotor does not exist, the motor does not output torque, the synthesized magnetic field intensity is basically zero, the iron loss of the motor is greatly reduced, the efficiency during charging and discharging is improved, and the current during charging and discharging can be continuously sampled by using the; when the phase-staggered control is adopted, the equivalent inductance of the motor during charging and discharging can be further increased, the current of each phase winding of the motor is basically consistent, the phase windings of the motor are staggered in a certain phase, the synthesized magnetic field intensity generated by all the windings of the motor is not zero, a high-frequency rotating magnetic field exists in the motor, and the phase current of the motor can be continuously used for sampling the current during charging and discharging by using a Hall.
It should be noted that, regardless of the in-phase or out-of-phase control adopted by the first dc charging circuit and the third dc charging circuit, the cooperative control of charging and discharging of the battery 101, heating of the battery 101, and torque output of the motor can be simultaneously realized.
In one embodiment, when the first dc port is connected to the first dc power consuming device, the external battery 101 forms a first dc discharging circuit with the first dc power supplying device through the reversible PWM rectifier 102 and the motor coil 103 in the energy conversion device;
when the external second dc port 110 is connected to the second dc power consuming device, the external battery 101 forms a third dc discharging circuit with the second dc power supplying device through the reversible PWM rectifier 102 and the motor coil 103 in the energy conversion device;
the energy conversion device selects the first direct current discharge circuit or the third direct current discharge circuit to work according to an external control signal;
or the energy conversion device selects the first direct current discharge circuit and the third direct current discharge circuit to work simultaneously or in a time-staggered mode according to an external control signal.
The energy conversion device selects the first direct current discharge circuit to work or the third direct current discharge circuit to work or the first direct current discharge circuit and the third direct current discharge circuit to work simultaneously according to the external control signal, which means that the energy conversion device selects the first direct current discharge circuit to work and the third direct current discharge circuit and the first direct current discharge circuit and the third direct current discharge circuit to work simultaneously by controlling the reversible PWM rectifier 102 according to the external control signal.
The first embodiment is that the energy conversion device realizes the selection of the first direct current discharge circuit operation by controlling the reversible PWM rectifier 102 according to the external control signal, and includes:
in the first case, the energy conversion device controls the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 to be turned on in phase according to the external control signal, so that the first dc discharge circuit operates, and controls the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 to be turned off, so that the second dc discharge circuit stops operating.
In the second case, the energy conversion device controls the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to be turned on to operate the first dc discharging circuit according to the external control signal phase error, and controls the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 to be turned off to stop the second dc discharging circuit.
The second embodiment is that the energy conversion device realizes the selection of the second dc discharge circuit operation by controlling the reversible PWM rectifier 102 according to the external control signal, and includes:
in the third situation, the energy conversion device controls the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 to conduct and conduct according to the external control signal in phase to enable the second dc discharge circuit to operate, and controls the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to conduct and enable the first dc discharge circuit to stop operating.
In the fourth situation, the energy conversion device controls the conduction of the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error to make the second discharge circuit work, and controls the conduction of the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 to make the first discharge circuit stop working.
The third embodiment is to control the reversible PWM rectifier 102 to make the first dc discharging circuit and the second dc discharging circuit operate simultaneously, and includes the following 8 cases:
in the fifth case, the energy conversion device controls the conduction of the bridge arm connected with the first winding unit and the conduction of the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 in phase according to the external control signal, so that when the first dc discharge circuit and the second dc discharge circuit operate simultaneously, the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 is conducted in phase, and the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 is conducted in phase;
in the sixth case, the energy conversion device controls the conduction of the bridge arm connected with the first winding unit and the conduction of the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 in the same phase according to the external control signal, so that when the first dc discharge circuit and the second dc discharge circuit operate simultaneously, the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 is conducted in the wrong phase, and the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 is conducted in the same phase;
in the seventh case, the energy conversion device controls in-phase conduction of the bridge arm connected to the first winding unit and conduction of the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 according to the external control signal, so that when the first dc discharge circuit and the second dc discharge circuit operate simultaneously, the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is in-phase conduction, and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 is in phase-shifted conduction;
in the eighth case, the energy conversion device controls the conduction of the bridge arm connected to the first winding unit and the conduction of the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 in the same phase according to the external control signal, so that when the first dc discharge circuit and the second dc discharge circuit operate simultaneously, the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in a phase-staggered manner, and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 is conducted in a phase-staggered manner;
in the ninth case, the energy conversion device controls the conduction of the bridge arm connected with the first winding unit and the conduction of the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error, so that when the first dc discharge circuit and the second dc discharge circuit operate simultaneously, the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 is conducted in phase, and the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 is conducted in phase;
in the tenth case, the energy conversion device controls the conduction of the bridge arm connected with the first winding unit and the conduction of the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error so that the first dc discharge circuit and the second dc discharge circuit work simultaneously, and makes the bridge arm connected with the first winding unit in the reversible PWM rectifier 102 phase error conductive and makes the bridge arm connected with the second winding unit in the reversible PWM rectifier 102 in phase-error conductive;
in the eleventh case, the energy conversion device controls the conduction of the bridge arm connected to the first winding unit and the conduction of the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error so that the first dc discharge circuit and the second dc discharge circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in the same phase, and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 is conducted in the phase error;
in the twelfth case, the energy conversion device controls the conduction of the bridge arm connected to the first winding unit and the conduction of the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 according to the external control signal phase error, so that the first dc discharge circuit and the second dc discharge circuit operate simultaneously, and the bridge arm connected to the first winding unit in the reversible PWM rectifier 102 is conducted in the phase error, and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 is conducted in the phase error.
In the above eight cases, the bridge arm connected to the first winding unit and the bridge arm connected to the second winding unit in the reversible PWM rectifier 102 may be controlled in phase, or may be controlled in phase-staggered manner, that is, staggered by a certain angle, for example, 180 degrees or 90 degrees, preferably 180 degrees; the bridge arm switch connected with each winding unit can adopt in-phase control and staggered phase control respectively.
The second embodiment of the application has the technical effects that: when the external charging and discharging port is connected with the direct-current electric equipment, a first direct-current discharging circuit is formed by the external battery 101, the reversible PWM rectifier 102, the first winding unit and the direct-current electric equipment, a third discharging circuit is formed by the external battery 101, the reversible PWM rectifier 102, the second winding unit and the direct-current electric equipment, and the first discharging circuit or the third discharging circuit can be selected to work according to different requirements.
In addition, the technical effects brought by the connection mode of the winding unit in the first dc charging circuit and the first dc discharging circuit and the control of the reversible PWM rectifier 102 are the same, and the technical effects brought by the connection mode of the winding unit in the third dc charging circuit and the third dc discharging circuit and the control of the reversible PWM rectifier 102 are the same, which can refer to the technical effects of the first dc charging circuit and the third dc charging circuit, and are not described herein again.
As a third embodiment, when the external dc port connects the dc power supply device and the dc power consuming device, the dc power supply device forms a first dc charging circuit with the external battery 101 through the reversible PWM rectifier 102 and the first winding unit in the energy conversion device;
the external battery 101 forms a third direct current discharge circuit with the direct current electric equipment through the reversible PWM rectifier 102 and the second winding unit in the energy conversion device;
the energy conversion device selects the first direct current charging circuit to work or the third direct current discharging circuit to work or the first direct current charging circuit and the third direct current discharging circuit to work simultaneously according to an external control signal.
Wherein, in the direct current charging mode, the external charging and discharging port is connected with the direct current power supply equipment, the direct current power supply equipment and the external battery 101 form a first direct current charging circuit through the reversible PWM rectifier 102 and the first winding unit in the energy conversion device, when the first direct current charging circuit works, the direct current power supply equipment provides direct current power for the first direct current charging circuit, the direct current power supply equipment, the first winding unit and the reversible PWM rectifier 102 form a first direct current charging energy storage loop, the direct current power supply equipment, the first winding unit, the reversible PWM rectifier 102 and the external battery 101 form a first direct current charging energy storage release loop, the first direct current charging circuit comprises a first direct current charging energy storage loop and a first direct current charging energy storage release loop, in the working process of the first direct current charging energy storage loop, the direct current power supply equipment stores the electric energy in the first winding unit by outputting the electric energy to the first direct current charging energy storage loop, in the working process of the first direct current charging energy storage release loop, the direct current power supply equipment and the first winding unit charge the external battery 101 together through the first direct current charging energy storage release loop, so that the process that the direct current power supply equipment charges the external battery 101 through the first direct current charging circuit is realized.
In the direct-current discharging mode, the external battery 101, the reversible PWM rectifier 102, the second winding unit and the direct-current electric equipment form a third direct-current discharging circuit, the external battery 101, the reversible PWM rectifier 102, the second winding unit and the direct-current electric equipment form a third direct-current discharging energy storage loop, the second winding unit, the reversible PWM rectifier 102 and the direct-current electric equipment form a third direct-current discharging energy storage and release loop, the third discharging circuit comprises a third direct-current discharging energy storage loop and a third direct-current discharging energy storage and release loop, in the working process of the third direct-current discharging energy storage loop, the external battery 101 outputs electric energy to the third direct-current discharging energy storage loop to store the electric energy in the second winding unit and discharge the direct-current electric equipment at the same time, in the working process of the third direct-current discharging energy storage and release loop, the second winding unit discharges the direct-current electric equipment through the third direct-current discharging energy storage loop, the process that the external battery 101 discharges the direct-current electric equipment through the third direct-current discharge circuit is realized.
The third embodiment of the present application has the technical effects that: when the external charging and discharging port is connected with the direct current power supply device and the direct current power consumption device, the direct current power supply device, the reversible PWM rectifier 102 and the first winding unit form a first direct current charging circuit with the external battery 101, and a third direct current discharging circuit is formed by the external battery 101, the reversible PWM rectifier 102, the second winding unit and the direct current power consumption device, so that the direct current power supply device can be selected to charge the external battery 101 according to different requirements, or the external battery 101 discharges the direct current power consumption device.
As a fourth embodiment, an external battery 101 forms a first dc discharge circuit with a dc power consuming device through a reversible PWM rectifier 102, a first winding unit, and a dc power converter;
the direct current power supply equipment forms a third direct current charging circuit with an external battery 101 through a reversible PWM rectifier 102 and a second winding unit in the energy conversion device;
the energy conversion device selects the first direct current discharging circuit to work or the third direct current charging circuit to work or the first direct current discharging circuit and the third direct current charging circuit to work simultaneously according to an external control signal.
In the direct current discharging mode, the external battery 101, the reversible PWM rectifier 102, the first winding unit and the direct current electric equipment form a first direct current discharging circuit, the external battery 101, the reversible PWM rectifier 102, the first winding unit and the direct current electric equipment form a first direct current discharging energy storage loop, the first winding unit, the reversible PWM rectifier 102 and the direct current electric equipment form a first direct current discharging energy storage releasing loop, the first discharging circuit comprises a first direct current discharging energy storage loop and a first direct current discharging energy storage releasing loop, in the working process of the first direct current discharging energy storage loop, the external battery 101 outputs electric energy to the first direct current discharging energy storage loop to store the electric energy in the first winding unit and simultaneously discharge the direct current electric equipment, in the working process of the first direct current discharging energy storage releasing loop, the first winding unit discharges the direct current electric equipment through the first direct current discharging energy storage storing loop, the process that the external battery 101 discharges the direct-current electric equipment through the first direct-current discharge circuit is realized.
Wherein, in the direct current charging mode, the external charging and discharging port is connected with the direct current power supply device, the reversible PWM rectifier 102, the second winding unit and the external battery 101 form a third direct current charging circuit, when the third direct current charging circuit works, the direct current power supply device provides direct current power supply for the third direct current charging circuit, the direct current power supply device, the second winding unit and the reversible PWM rectifier 102 form a second direct current charging energy storage loop, the direct current power supply device, the second winding unit, the reversible PWM rectifier 102 and the external battery 101 form a third direct current charging energy storage and release loop, the third direct current charging circuit comprises a third direct current charging energy storage loop and a third direct current charging energy storage and release loop, in the working process of the third direct current charging energy storage loop, the direct current power supply device stores the electric energy in the second winding unit by outputting the electric energy to the third direct current charging energy storage loop, in the working process of the third dc charging energy storage release circuit, the dc power supply device and the second winding unit charge the external battery 101 through the third dc charging energy storage release circuit together, so that the process that the dc power supply device charges the external battery 101 through the third dc charging circuit is realized.
The fourth embodiment of the present application has the technical effects that: when the external charging and discharging port is connected with the direct current power supply device and the direct current power consumption device, the external battery 101, the reversible PWM rectifier 102, the first winding unit and the direct current power consumption device form a first direct current discharging circuit, and a third direct current charging circuit is formed by the direct current power supply device, the reversible PWM rectifier 102, the second winding unit and the external battery 101, so that the direct current power supply device can be selected to charge the external battery 101 according to different requirements, or the external battery 101 discharges the direct current power consumption device.
As a fifth embodiment, when the external charging/discharging port and the energy conversion device form a heating circuit, the external charging/discharging port and the reversible PWM rectifier 102 and the first winding unit in the energy conversion device form a first heating circuit, the external charging/discharging port and the reversible PWM rectifier 102 and the second winding unit in the energy conversion device form a second heating circuit, the external charging/discharging port and the reversible PWM rectifier 102 and the first winding unit in the energy conversion device form a third driving circuit, the external charging/discharging port and the reversible PWM rectifier 102 and the second winding unit in the energy conversion device form a fourth driving circuit, and the reversible PWM rectifier 102 controls the first dc discharging circuit and the second heating circuit to cooperate with each other, or the third dc discharging circuit and the first heating circuit to cooperate with each other, or the first dc discharging circuit to cooperate with each other, according to the external control signal, The second heating circuit and the third driving circuit cooperate with each other, or the third DC discharging circuit, the first heating circuit and the fourth driving circuit cooperate with each other.
When the energy conversion device controls the first heating loop or the second heating loop to work according to an external control signal, the direct current supply equipment outputs current to the first heating loop or the second heating loop, the current flows through the motor coil 103 to enable the motor coil 103 to consume electricity to generate heat, the generated heat can be used for heating the battery 101 or seat waiting heating equipment, and the cooperative work of the heating loop and the charging circuit and the cooperative work of the heating loop, the charging circuit and the driving circuit are realized.
As a seventh embodiment, when the battery 101 and the energy conversion device form a heating circuit, the external battery 101, the reversible PWM rectifier 102 and the first winding unit in the energy conversion device form a third heating circuit, the external battery 101, the reversible PWM rectifier 102 and the second winding unit in the energy conversion device form a fourth heating circuit, and the reversible PWM rectifier 102 controls to make the first dc charging circuit and the fourth heating circuit cooperate with each other, or make the third dc charging circuit and the third heating circuit cooperate with each other, or make the first dc charging circuit, the fourth heating circuit and the first driving circuit cooperate with each other, or make the third dc charging circuit, the third heating circuit and the second driving circuit cooperate with each other according to the external control signal.
When the energy conversion device controls the third heating circuit or the fourth heating circuit to work according to the external control signal, the external battery 101 outputs current to the third heating circuit or the fourth heating circuit, the current flows through the motor coil 103 to enable the motor coil 103 to consume electricity to generate heat, the generated heat can be used for heating the battery 101 or seat waiting heating equipment, and the heating circuit and the discharging circuit can work cooperatively and the heating circuit, the discharging circuit and the driving circuit can work cooperatively.
As an embodiment, the energy conversion device includes a first switch 105 module, a second switch 106 module, a third switch module, a fourth switch module, and a first capacitor, wherein the positive terminal and the negative terminal of the external battery 101 are respectively connected to the first terminal and the second terminal of the first switch 105 module, the third terminal of the first switch 105 module is connected to the first terminal and the first sink terminal of the first capacitor, the fourth terminal of the first switch 105 module is connected to the second terminal and the second sink terminal of the first capacitor, the first terminal of the second switch 106 module is connected to the first switch 105, the second terminal of the second switch 106 module is connected to the second sink terminal, the third terminal and the fourth terminal of the second switch 106 module are respectively connected to the first terminal and the second terminal of the external first dc port, the first terminal and the second terminal of the external second dc port 110 are respectively connected to the first terminal and the second terminal of the third switch module, the third terminal and the fourth terminal of the third switch module are respectively connected to the first sink terminal and the second sink terminal, a first end of the fourth switch module is connected to the second switch 106, a second end of the fourth switch module is connected to the second bus, and a third end and a fourth end of the fourth switch module are respectively connected to a first end and a second end of the external third dc port 105.
The fourth switch module comprises a tenth switch, an eleventh switch and a third capacitor, a first end of the tenth switch and a first end of the third capacitor are connected in common and form a first end of the fourth switch module, a second end of the third capacitor and a first end of the eleventh switch are connected in common and form a second end of the fourth switch module, a second end of the tenth switch is a third end of the fourth switch module, and a second end of the eleventh switch is a fourth end of the second switch 106 module.
In this embodiment, by providing the third capacitor, the voltage values of the dc power device and the dc discharging device connected to the external dc port can be obtained according to the third capacitor, and the energy conversion device can be connected to or disconnected from the external dc charging/discharging port by controlling the tenth switch and the eleventh switch to be connected to or disconnected from each other.
The fourth switch module can further comprise a tenth switch and a third capacitor, the first end of the third capacitor is the first end and the third end of the fourth switch module, the second end of the tenth switch and the first end of the third capacitor are connected in common and form the second end of the fourth switch module, and the second end of the tenth switch is the fourth end of the fourth switch module.
Compared with the previous embodiment, the embodiment reduces the eleventh switch, can achieve the same effect through the tenth switch, and saves the cost of the whole device.
For the reversible PWM rectifier 102, as an embodiment, as shown in fig. 7, the reversible PWM rectifier 102 includes a set of M1The motor coil 103 comprises a first winding unit and a second winding unit;
the first winding unit comprises a set of m1Phase winding, m1Each of the phase windings includes n1A coil branch of n for each phase winding1The coil branches are connected together to form a phase terminal m1Phase end point and M of phase winding1M in road bridge arm1The middle points of each path of bridge arm of the path bridge arms are connected in one-to-one correspondence, and m is1N of each of the phase windings1One of the coil branches is also respectively connected with n of other phase windings1One of the coil branches is connected to form n1A connection point, n1A connection point forming T1A neutral point, T1Each neutral point leads out a first neutral line, where m1≥2，n1≥T1N is not less than 11，m1，T1Are all integers;
the second winding unit comprises a set of m2Phase winding, m2Each of the phase windings includes n2A coil branch of n for each phase winding2The coil branches are connected together to form a phase terminal m2Phase end point and M of phase winding1M in road bridge arm2The middle points of each path of bridge arm of the path bridge arms are connected in one-to-one correspondence, and m is2N of each of the phase windings2One of the coil branches is also respectively connected with n of other phase windings2One of the coil branches is connected to form n2A connection point, n2A connection point forming T2A neutral point, T2A second neutral line is led out from the neutral point, wherein m2≥2，M1≥m1+m2，n2≥T2N is not less than 11，m1，M1，T2Are all integers.
As an implementation, n1＝n2And when the voltage is more than or equal to 2, the first winding unit comprises two connection points, wherein 1 connection point forms a first independent neutral point, a first neutral line is led out from the first independent neutral point, the second winding unit comprises two connection points, a second independent neutral point is formed from 1 connection point, and a second neutral line is led out from the second independent neutral point.
FIG. 8 is a circuit diagram of an energy conversion device according to the present embodiment, where m is1＝M1＝3，n1＝n2As an example, the energy conversion device includes a reversible PWM rectifier 102, a motor coil 103, a switch K3, a switch K4, a resistor R, a switch K5, and a capacitor C1, wherein a positive electrode of an external battery 101 is connected to a first end of the switch K3 and a first end of the switch K4, a second end of the switch K4 is connected to a first end of the resistor R, a second end of the switch K3 and a second end of the resistor R are connected to a first end of the capacitor C1, a negative electrode of the battery 101 is connected to a first end of the switch K5, a second end of the switch K5 is connected to a second end of the capacitor C1, the reversible PWM rectifier 102 includes a six-phase bridge arm, the first-phase bridge arm includes a first power switch unit and a second power switch unit connected in series, the second-phase bridge arm includes a third power switch unit and a fourth power switch unit connected in series, the third-phase bridge arm includes a fifth power switch unit and a sixth power switch unit connected in, the fourth phase bridge arm comprises a seventh power switch unit and an eighth power switch unit which are connected in series, the fifth phase bridge arm comprises a ninth power switch unit and a tenth power switch unit which are connected in series, and the sixth phase bridge arm comprises an eleventh power switch unit which is connected in seriesAnd a twelfth power switch unit, an input terminal of the first power switch unit, an input terminal of the third power switch unit, an input terminal of the fifth power switch unit, an input terminal of the seventh power switch unit, an input terminal of the ninth power switch unit, and an input terminal of the eleventh power switch unit being commonly connected to a first terminal of the capacitor C1 and forming a first bus terminal, an output terminal of the second power switch unit, an output terminal of the fourth power switch unit, an output terminal of the sixth power switch unit, an output terminal of the eighth power switch unit, an output terminal of the tenth power switch unit, and an output terminal of the twelfth power switch unit being commonly connected to a second terminal of the capacitor C1 and forming a second bus terminal, the first power switch unit including a first upper bridge arm VT1 and a first upper bridge diode VD1, the second power switch unit including a second lower bridge arm VT2 and a second lower bridge diode VD2, the third power switch unit including a third upper bridge arm 3 and a third upper bridge diode VD3, the fourth power switch unit comprises a fourth lower bridge arm VT4 and a fourth lower bridge diode VD4, the fifth power switch unit comprises a fifth upper bridge arm VT5 and a fifth upper bridge diode VD5, the sixth power switch unit comprises a sixth lower bridge arm VT6 and a sixth lower bridge diode VD6, the seventh power switch unit comprises a seventh upper bridge arm VT7 and a seventh upper bridge diode VD7, the eighth power switch unit comprises an eighth lower bridge arm VT8 and an eighth lower bridge diode VD8, the ninth power switch unit comprises a ninth upper bridge arm VT9 and a ninth upper bridge diode VD9, the tenth power switch unit comprises a tenth lower bridge arm VT10 and a tenth lower bridge diode VD10, the eleventh power switch unit comprises an eleventh upper bridge arm VT11 and an eleventh upper bridge diode VD11, the twelfth power switch unit comprises a twelfth lower bridge arm VT12 and a twelfth lower bridge diode VD12, the first power switch unit comprises a set of three-phase coils, each phase winding comprises two coils, a coil U1 and a coil U2 in the first-phase coil are connected to a midpoint U of the fourth-phase arm in a sharing mode, a coil V1 and a coil V2 in the second-phase coil are connected to a midpoint V of the fifth-phase arm in a sharing mode, a coil W1 and a coil W2 in the third-phase coil are connected to a midpoint W of the sixth-phase arm in a sharing mode, a coil U2, a coil V2 and a coil W2 in the third-phase coil are connected in a sharing mode to form a first connection point n1, a first connection point n1 forms a first independent neutral point, a coil U1, a coil V1 and a coil W1 in the sharing mode to form a second connection point n2, andn2 forms a second independent neutral point, the second winding unit 132 is provided with a set of three-phase windings, each phase winding comprises two coils, a coil a1 and a coil a2 in the first phase coil are connected to the midpoint a of the first phase bridge arm, a coil B1 and a coil B2 in the second phase coil are connected to the midpoint B of the second phase bridge arm, a coil C1 and a coil C2 in the third phase coil are connected to the midpoint C of the third phase bridge arm, a coil a1, a coil B1 and a coil C1 are connected to form a fourth connection point n4, a coil a2, a coil B2 and a coil C2 are connected to form a third connection point n3, a third connection point n3 forms a third independent neutral point, the third independent neutral point leads out a first neutral line, the energy conversion module further comprises a switch K9, a switch K6, a switch K7 and a capacitor C2, a first end and a second end of an external direct current port are respectively connected to a second end of a switch K6 and a second end of a switch K7, a second end of a switch K867, a capacitor C87458 and a capacitor C2, a first terminal of the switch K1 is connected to the first neutral line, and a second terminal of the switch K7 is connected to the second terminal of the capacitor C2 and the second bus terminal of the reversible PWM rectifier 102.
As shown in fig. 9, the difference from fig. 8 is that the first connection point n1 forms a neutral point and leads out a first neutral line, which is connected to the first end of the switch K4.
As shown in fig. 10, the difference from fig. 8 is that the first connection point n1 and the third connection point n3 are connected together to form a neutral point and a first neutral line is drawn out, and the first neutral line is connected to a first end of the switch K4.
As shown in fig. 11, the difference from fig. 8 lies in that the energy conversion device further includes a switch K8 and a switch K9, a first end of the third dc charge/discharge port is connected to a first end of the switch K8, a second end of the switch K8 is connected to a first end of the capacitor C1, a second end of the third dc charge/discharge port is connected to a first end of the switch K9, and a second end of the switch K9 is connected to a second end of the capacitor C1.
As shown in fig. 12, the energy conversion apparatus is different from fig. 8 in that the energy conversion apparatus further includes a switch K2, a switch K10, a switch K11, and a capacitor C3, the first connection point n1 forms a first neutral point and leads out a first neutral line, the first neutral line is connected to a first end of the switch K1, the third connection point forms a second neutral point and leads out a second neutral line, the second neutral line is connected to a first end of the switch K2, a second end of the switch K2 is connected to a first end of the capacitor C3 and a first end of the switch K10, a second end of the switch K10 is connected to a first end of the third dc port 105, a second end of the capacitor C3 is connected to a first end of the switch K11 and a second sink, and a second end of the switch K11 is connected to a second end of the second dc port 110.
As shown in fig. 13, the energy conversion device is different from that shown in fig. 12 in that the energy conversion device further includes a switch K8 and a switch K9, a first end of the second dc charge/discharge port is connected to a first end of the switch K8, a second end of the switch K8 is connected to a first end of the capacitor C1, a second end of the second dc charge/discharge port is connected to a first end of the switch K9, and a second end of the switch K9 is connected to a second end of the capacitor C1.
As shown in fig. 14, the difference from fig. 8 is that: the first winding unit is a first three-phase winding, each phase winding only comprises one phase coil, the three-phase coils form a first connecting point n1, the second winding unit is a second three-phase winding, each phase winding only comprises one phase coil, the three-phase coils form a first connecting point n2, the first connecting point n1 and the second connecting point n2 are connected together to form a neutral point, a first neutral line is led out, and the first neutral line is connected with the first end of the switch K1.
As shown in fig. 15, the difference from fig. 14 is that: the switch K6 is not provided, and the first connection point n1 forms a first neutral point and leads out a first neutral line, the first neutral line is connected with a first end of the switch K1, the second connection point n2 forms a second neutral point and leads out a second neutral line, the second neutral line is connected with a first end of the switch K2, and a second end of the switch K1 and a second end of the switch K2 are connected in common with a first end of the first dc port.
As shown in fig. 16, the difference from fig. 14 is that an inductor L1 is further included, the first connection point n1 forms a first neutral point and leads out a first neutral line, the first neutral line is connected to a first end of a switch K1, the second connection point n2 forms a second neutral point and leads out a second neutral line, the second neutral line is connected to a first end of a switch K2, a second end of a switch K1 and a second end of a switch K2 are connected to a first end of the inductor L1 in common, and a second end of the inductor L1 is connected to a first end of a switch K6.
As shown in fig. 17, the difference from fig. 14 lies in that an inductor L1 and an inductor L2 are further included, a first connection point n1 forms a first neutral point and leads out a first neutral line, the first neutral line is connected with a first end of a switch K1, a second end of the switch K1 is connected with a first end of an inductor L1, a second connection point n2 forms a second neutral point and leads out a second neutral line, the second neutral line is connected with a first end of a switch K2, a second end of the switch K2 is connected with a first end of an inductor L2, and a first end of the inductor L1 and a second end of the inductor L1 are connected with the first end of the switch K6.
As shown in fig. 18, the difference from fig. 15 is that the second terminal of the switch K1 is connected to the first terminal of the first dc port, and the second terminal of the switch K2 is connected to the first terminal of the third dc port 105.
As shown in fig. 19, the energy conversion device is different from that shown in fig. 18 in that the energy conversion device further includes a switch K8 and a switch K9 in that a first end of the second dc charge/discharge port is connected to a first end of a switch K8, a second end of the switch K8 is connected to a first end of a capacitor C1, a second end of the second dc charge/discharge port is connected to a first end of a switch K9, and a second end of the switch K9 is connected to a second end of a capacitor C1.
The following describes the technical solution of the embodiment of the present application in detail through a specific circuit structure:
as shown in fig. 20 and fig. 21, when it is detected that the first dc port is connected to the first dc power supply device, the second dc port 110 is connected to the second dc power supply device, and the first dc power supply device and the second dc power supply device simultaneously perform dc charging on the energy conversion apparatus, the in-phase control reversible PWM rectifier 102 operates, which is implemented as follows:
controlling the switch K4 and the switch K5 to be conducted to precharge the capacitor C1, keeping the switch K1, the switch K2, the switch K3, the switch K6, the switch K7, the switch K10 and the switch K11 to be disconnected, after the precharge is finished, controlling the switch K3 to be conducted, controlling the switch K4 to be disconnected, after receiving a target voltage range value sent by a battery 101 manager, controlling the switches K1 and K2 to be closed, performing voltage control on the capacitor C1 and the capacitor C2, after a set voltage is reached, controlling the switches K6, K7, K10 and K11 to be closed, and controlling the first direct current power supply device and the second direct current power supply device to start charging when the voltage sampling U on the capacitor C1 and the capacitor C2 is judged to be within the formal sent target value range, otherwise, disconnecting all the switches and stopping charging.
As shown in fig. 20, the second lower bridge arm VT2, the fourth lower bridge arm VT4 and the sixth lower bridge arm VT6 are controlled to be turned on, the first upper bridge arm VT1, the third upper bridge arm VT3 and the fifth upper bridge arm VT5 are controlled to be turned off, the seventh upper bridge arm VT7, the ninth upper bridge arm VT9 and the eleventh upper bridge arm VT11 are controlled to be turned off, the eighth lower bridge arm VT8, the tenth lower bridge arm VT10 and the twelfth lower bridge arm VT12 are controlled to be turned off, and the first dc power supply device, the switch K6, the switch K1, the first winding unit, the reversible PWM rectifier 102 (a seventh upper bridge diode VD7, a ninth upper bridge diode VD9 and an eleventh upper bridge diode VD11), the switch K3, the external battery 101, the switch K5 and the switch K7 constitute a first dc charging energy storage and release circuit; meanwhile, the second direct-current power supply device, the switch K10, the switch K2, the second winding unit, the reversible PWM rectifier 102 (the second lower bridge arm VT2, the fourth lower bridge arm VT4, the sixth lower bridge arm VT6), and the switch K11 form a second direct-current charging energy storage loop, and the energy conversion device enables the first direct-current charging energy storage release loop and the second direct-current charging energy storage loop to simultaneously work according to an external control signal.
As shown in fig. 21, the second lower bridge arm VT2, the fourth lower bridge arm VT4 and the sixth lower bridge arm VT6 are controlled to be turned off, the first upper bridge arm VT1, the third upper bridge arm VT3 and the fifth upper bridge arm VT5 are controlled to be turned off, the seventh upper bridge arm VT7, the ninth upper bridge arm VT9 and the eleventh upper bridge arm VT11 are controlled to be turned off, the eighth lower bridge arm VT8, the tenth lower bridge arm VT10 and the twelfth lower bridge arm VT12 are controlled to be turned on, the first dc power supply device, the switch K6, the switch K1, the first winding unit, the reversible PWM rectifier 102 (the eighth lower bridge arm VT8, the tenth lower bridge arm VT10 and the twelfth lower bridge arm VT12), the switch K7 form a first dc charging energy storage loop, and the second dc power supply device, the switch K10, the switch K2, the second winding unit, the reversible PWM rectifier 102 (the first upper bridge diode 36vd 58, the third upper bridge arm VT 36vd 72, the fifth upper bridge diode VD 3), the second dc battery 3 and the second dc storage switch 3 and the switch 36k 3, the energy conversion device enables the second direct current charging energy storage release circuit and the first direct current charging energy storage circuit to work simultaneously according to the external control signal.
The energy conversion device controls the first direct current charging energy storage loop and the first direct current charging energy storage release loop to work alternately according to an external control signal to realize that the first direct current power supply equipment charges the battery 101 through the energy conversion device, controls the second direct current charging energy storage loop and the second direct current charging energy storage release loop to work alternately according to the external control signal to realize that the second power supply equipment charges the battery 101 through the energy conversion device, enables the first direct current charging energy storage release loop and the second direct current charging energy storage loop to work simultaneously through phase-staggered control, enables the second direct current charging energy storage release loop and the first direct current charging energy storage loop to work simultaneously, and further realizes that the first direct current power supply equipment and the second direct current power supply equipment charge the external battery 101 through the energy conversion device simultaneously.
As shown in fig. 22 and 23, the first dc port is connected to the dc power consuming device, the second dc port 110 is connected to the dc charging device, the external battery 101 is discharged to the dc power consuming device through the energy conversion device, and the dc charging device is charged by the external battery 101 through the energy conversion device, which is implemented as follows:
as shown in fig. 22, the second lower bridge arm VT2, the fourth lower bridge arm VT4 and the sixth lower bridge arm VT6 are controlled to be on, the first upper bridge arm VT1, the third upper bridge arm VT3 and the fifth upper bridge arm VT5 are controlled to be off, meanwhile, the seventh upper bridge arm VT7, the ninth upper bridge arm VT9 and the eleventh upper bridge arm VT11 are controlled to be turned off, the eighth lower bridge arm VT8, the tenth lower bridge arm VT10 and the twelfth lower bridge arm VT12 are controlled to be turned off, the first winding unit, the switch K1, the switch K6, the direct current electric equipment, the switch K7 and the reversible PWM rectifier 102 (an eighth lower bridge diode VD8, a tenth lower bridge diode VD10 and a twelfth lower bridge diode VD12) form a direct current discharge energy storage and release loop, meanwhile, the direct-current charging equipment, the switch K10, the switch K2, the second winding unit, the reversible PWM rectifier 102 (the second lower bridge arm VT2, the fourth lower bridge arm VT4 and the sixth lower bridge arm VT6) and the switch K11 form a direct-current charging energy storage loop, and the energy conversion device enables the direct-current discharging energy storage release loop and the direct-current charging energy storage loop to work simultaneously according to an external control signal.
As shown in fig. 23, the second lower bridge arm VT2, the fourth lower bridge arm VT4, the sixth lower bridge arm VT6 are controlled to be turned off, the first upper bridge arm VT1, the third upper bridge arm VT3, the fifth upper bridge arm VT5 are controlled to be turned off, the seventh upper bridge arm VT7, the ninth upper bridge arm VT9, the eleventh upper bridge arm VT11 are controlled to be turned on, the eighth lower bridge arm VT 28, the tenth lower bridge arm VT10, the twelfth lower bridge arm VT12 are controlled to be turned off, the capacitor C1, the reversible PWM rectifier 102 (the seventh upper bridge arm VT7, the ninth upper bridge arm VT9, the eleventh upper bridge arm VT11), the first winding unit, the switch K1, the switch K6, the dc-using device, the switch K7 form a dc discharging energy storage and release circuit, and the dc charging device, the switch K7, the second winding unit, the reversible rectifier 102 (the first upper bridge diode VD7, the third upper bridge diode 7, the dc charging switch 7, the dc storage battery 7), the energy conversion device enables the direct current discharging energy storage release loop and the direct current charging energy storage loop according to an external control signal.
The energy conversion device controls the direct-current charging energy storage loop and the direct-current charging energy storage release loop to work alternately according to an external control signal to realize that the direct-current power supply equipment charges the battery 101 through the energy conversion device, controls the direct-current discharging energy storage loop and the direct-current discharging energy storage release loop to work alternately according to the external control signal to realize that the external battery 101 discharges the direct-current power utilization equipment through the energy conversion device, controls the direct-current charging energy storage release loop and the direct-current discharging energy storage loop to work simultaneously through phase error control, enables the direct-current charging energy storage release loop and the direct-current discharging energy storage loop to work simultaneously, and further realizes that the direct-current power supply equipment charges the external battery 101 through the energy conversion device and the external battery 101 discharges the direct-current power utilization equipment through the energy conversion device simultaneously.
As shown in fig. 24 and 25, the first dc port is connected to the first dc power consuming device, the second dc port 110 is connected to the second dc power consuming device, the external battery 101 discharges to the first dc power consuming device through the energy conversion device, and at the same time, the external battery 101 discharges to the second dc power consuming device through the energy conversion device, which is implemented as follows:
as shown in fig. 24, the second lower bridge arm VT2, the fourth lower bridge arm VT4 and the sixth lower bridge arm VT6 are controlled to be turned off, the first upper bridge arm VT1, the third upper bridge arm VT3 and the fifth upper bridge arm VT5 are controlled to be turned on, the seventh upper bridge arm VT7, the ninth upper bridge arm VT9 and the eleventh upper bridge arm VT11 are controlled to be turned off, the eighth lower bridge arm VT8, the tenth lower bridge arm VT10 and the twelfth lower bridge arm VT12 are controlled to be turned off, the external battery 101, the reversible PWM rectifier 102 (the seventh upper bridge arm VT7, the ninth upper bridge arm VT9 and the eleventh upper bridge arm VT 42), the first winding unit, the switch K1, the switch K6, the first dc power device, the switch K7 and the switch K3 form a first dc discharging energy storage circuit, and the second winding unit, the switch K2, the switch K10, the second dc power device, the switch K11, the reversible lower bridge rectifier 102 (the sixth lower bridge arm VT2 and the fourth dc discharging energy storage diode VD 4), the energy conversion device enables the first direct current discharge energy storage circuit and the second direct current discharge energy storage release circuit to work simultaneously according to an external control signal.
As shown in fig. 25, the second lower bridge arm VT2, the fourth lower bridge arm VT4 and the sixth lower bridge arm VT6 are controlled to be turned off, the first upper bridge arm VT1, the third upper bridge arm VT3 and the fifth upper bridge arm VT5 are controlled to be turned on, the seventh upper bridge arm VT7, the ninth upper bridge arm VT9 and the eleventh upper bridge arm VT11 are controlled to be turned off, the eighth lower bridge arm VT8, the tenth lower bridge arm VT10 and the twelfth lower bridge arm VT12 are controlled to be turned off, the first winding unit, the switch K1, the switch K6, the first dc power consumption device, the switch K7, the reversible PWM rectifier 102 (the second lower bridge diode VD2, the fourth lower bridge diode 4 and the sixth lower bridge diode VD6) form a first dc discharging energy storage and release circuit, and the battery 101, the switch K3, the reversible PWM rectifier 102 (the first upper bridge arm VT1, the third upper bridge arm 3, the fifth upper bridge arm VT5), the second dc power storage and the second dc power discharge circuit 5 are formed by the switch VT5 and the switch K5, the energy conversion device enables the first direct current discharge energy storage release loop and the second direct current discharge energy storage loop to work simultaneously according to an external control signal.
The energy conversion device controls the first direct current discharge energy storage loop and the first direct current discharge energy storage release loop to work alternately according to an external control signal to realize that the external battery 101 discharges the first direct current electric equipment through the energy conversion device, controls the second direct current discharge energy storage loop and the second direct current discharge energy storage release loop to work alternately according to the external control signal to realize that the external battery 101 discharges the second direct current electric equipment through the energy conversion device, enables the first direct current discharge energy storage loop and the second direct current discharge energy storage release loop to work simultaneously through phase-staggered control, enables the second direct current discharge energy storage loop and the first direct current discharge energy storage release loop to work simultaneously, and further realizes that the external battery 101 discharges the first direct current electric equipment and the second direct current electric equipment simultaneously through the energy conversion device.
An embodiment of the present invention provides an energy conversion apparatus, as shown in fig. 26, including:
an energy storage connection comprising a first energy storage connection and a second storage connection;
a first bus end of the reversible PWM rectifier 102 is connected with the first energy storage connecting end, and a second bus end of the reversible PWM rectifier 102 is connected with the second energy storage connecting end;
the motor comprises a motor coil 103, the motor comprises a plurality of sets of winding units, and the motor coil 103 is connected with the reversible PWM rectifier 102;
and the charging connection end group comprises a first charging connection end and a second charging connection end, the first charging connection end is connected with at least one set of winding unit of the motor coil 103, and the second charging connection end is connected with the second confluence end.
The energy storage connection terminal set is used for connecting an external battery 101, and the charging or discharging connection terminal set is used for connecting an external charging port.
The third embodiment of the application provides a vehicle, and the vehicle further comprises the energy conversion device provided by the first embodiment.
As shown in fig. 27, the heating and cooling circuit of the battery 101 pack includes the following circuits: a motor drive system cooling circuit, a battery 101 cooling system circuit, and an air conditioning system cooling circuit. A cooling system loop of the battery 101 is fused with an air-conditioning cooling system through a heat exchange plate; the battery 101 cooling system loop is communicated with the motor driving system cooling loop through the four-way valve. The motor drive system cooling circuit connects and disconnects the radiator by switching of the three-way valve. The motor driving system cooling loop and the battery 101 cooling loop are switched through the valve body, the flow direction of cooling liquid in the pipeline is changed, the flow direction of the cooling liquid heated by the motor driving system is enabled to flow to the battery 101 cooling system, and heat is transferred from the motor driving system to the battery 101 for cooling; when the motor driving system is in a non-heating mode, the cooling liquid of the motor driving system flows through a loop A and the cooling liquid of the battery 101 cooling system flows through a loop C by switching the three-way valve and the four-way valve; when the motor is in a heating mode, the cooling liquid of the motor driving system flows through a loop B by switching the three-way valve and the four-way valve, so that the cooling liquid heated by the motor driving system flows to a cooling loop of the battery 101 bag to heat the battery 101.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (20)

1. An energy conversion device is characterized by comprising a reversible PWM rectifier and a motor coil, wherein the motor coil comprises at least two sets of winding units, and each set of winding is connected with the reversible PWM rectifier;
the external first direct current port forms a direct current charging circuit or a direct current discharging circuit with an external battery through the energy conversion device, and the external battery forms a driving circuit with the reversible PWM rectifier and the motor coil in the energy conversion device; the reversible PWM rectifier further comprises a first bus end and a second bus end, the first end of the external first direct current port is connected with a neutral line led out by at least one set of winding units of the motor coil, the second end of the external first direct current port is connected with the second bus end, the positive end of the external battery is connected with the first bus end, and the negative end of the external battery is connected with the second bus end.
2. The energy conversion device according to claim 1, wherein the energy conversion device further comprises a first switch, the motor coil comprises a first winding unit and a second winding unit, the first winding unit is connected with the reversible PWM rectifier, the second winding unit is connected with the reversible PWM rectifier, the first winding unit leads out a first neutral wire, and the first neutral wire is connected with a first end of the external first dc port through the first switch.
3. The energy conversion device according to claim 2, wherein when an external first dc port is connected to a dc power supply, the first switch, the first winding unit, the reversible PWM rectifier and an external battery form a first dc charging circuit;
when the external first direct current port is connected with the direct current electric equipment, the external battery, the reversible PWM rectifier, the first winding unit, the first switch and the direct current electric equipment form a first direct current discharging circuit.
4. The energy conversion device according to claim 1, further comprising a first switch, wherein the motor coil comprises a first winding unit and a second winding unit, the first winding unit is connected with the reversible PWM rectifier, the second winding unit is connected with the reversible PWM rectifier, the first winding unit leads out a first neutral wire, the second winding unit leads out a second neutral wire, and the second neutral wire is connected with a first end of the external first dc port through the first switch.
5. The energy conversion device according to claim 1, wherein the energy conversion device further comprises a first switch, the motor coil comprises a first winding unit and a second winding unit, the first winding unit is connected with the reversible PWM rectifier, the second winding unit is connected with the reversible PWM rectifier, the first winding unit leads out a first neutral line, the second winding unit leads out a second neutral line, and the first neutral line and the second neutral line are connected in common and then connected with a first end of an external first dc port through the first switch.
6. The energy conversion device according to claim 1, further comprising a first switch and a second switch, wherein the motor coil comprises a first winding unit and a second winding unit, the first winding unit is connected with the reversible PWM rectifier, the second winding unit leads out a second neutral wire, the first neutral wire is connected with a first end of the external first dc port through the first switch, and the second neutral wire is connected with a first end of the external first dc port through the second switch.
7. The energy conversion device according to claim 6, wherein when the external first dc port is connected to a dc power supply, the first switch, the first winding unit, the reversible PWM rectifier and an external battery form a first dc charging circuit;
the direct current power supply equipment, the second switch, the second winding unit, the reversible PWM rectifier and an external battery form a third direct current charging circuit;
the energy conversion device controls the first direct current charging circuit to work or controls the third direct current charging circuit to work or controls the first direct current charging circuit and the third direct current charging circuit to work simultaneously according to an external control signal;
when the first external direct current port is connected with direct current electric equipment, a first direct current discharging circuit is formed by an external battery, the reversible PWM rectifier, the first winding unit, the first switch and the direct current electric equipment;
the external battery, the reversible PWM rectifier, the second winding unit, the second switch and the direct current electric equipment form a third-year direct current discharge circuit;
the energy conversion device controls the first direct current discharge circuit to work or controls the third direct current discharge circuit to work or controls the first direct current discharge circuit and the third direct current discharge circuit to work simultaneously according to an external control signal.
8. The energy conversion device according to claim 7, wherein the energy conversion device comprises a first inductor, a first terminal of the first switch is connected to the first neutral line, a first terminal of the second switch is connected to the second neutral line, a second terminal of the first switch and a second terminal of the second switch are connected to a first terminal of the first inductor, and a second terminal of the second inductor is connected to a first terminal of an external first dc port.
9. The energy conversion device according to claim 7, wherein the energy conversion device comprises a second inductor and a third inductor, the first terminal of the first switch is connected to the first neutral line, the second terminal of the first switch is connected to the first terminal of the second inductor, the first terminal of the second switch is connected to the second neutral line, the second terminal of the second switch is connected to the first terminal of the second inductor, and the second terminal of the first inductor and the second terminal of the second inductor are connected in common and then connected to the first terminal of the external first dc port.
10. The energy conversion device according to any one of claims 1 to 9, the energy conversion device also comprises a first switch module, a second switch module and a first capacitor, wherein the positive pole end and the negative pole end of an external battery are respectively connected with the first end and the second end of the first switch module, the third end of the first switch module is connected with the first end of the first capacitor and the first bus end, the fourth end of the first switch module is connected with the second end of the first capacitor and the second bus end, the first end of the second switch module is connected with the second switch, the second end of the second switch module is connected with the second junction end, and the third end and the fourth end of the second switch module are respectively connected with the first end and the second end of the first direct current port, and the external second direct current port is connected with the first junction end and the second junction end through the third switch module.
11. The energy conversion device according to claim 1, wherein the energy conversion device comprises a first switch and a second switch, the motor coil comprises a first winding unit and a second winding unit, the first winding unit is connected with the reversible PWM rectifier, the second winding unit is connected with the reversible PWM rectifier, the first winding unit leads out a first neutral line, the second winding unit leads out a second neutral line, a first end of an external first dc port is connected with the first neutral line, a second end of the external first dc port is connected with the second bus terminal, an external third dc port is connected with the second neutral line, and a second end of the external third dc port is connected with the second bus terminal.
12. The energy conversion device according to claim 11, wherein when an external first dc port is connected to a first dc supply device, the first dc supply device forms a first dc charging circuit with an external battery through the motor coil and the reversible PWM rectifier in the energy conversion device;
when an external third direct current port is connected with second direct current power supply equipment, the second direct current power supply equipment and an external battery form a third direct current charging circuit through the motor coil and the reversible PWM rectifier in the energy conversion device;
the energy conversion device selects the first direct current charging circuit or the third direct current charging circuit to work according to an external control signal;
or the energy conversion device selects the first direct current charging circuit and the third direct current charging circuit to work simultaneously or in a time-staggered mode according to an external control signal.
13. The energy conversion device of claim 11, wherein when an external first dc port is connected to a first dc power device, the external battery forms a first dc discharge circuit with the first dc power device through the reversible PWM rectifier, the motor coil, and the first dc power device in the energy conversion device;
when an external third direct current port is connected with second direct current electric equipment, a third direct current discharge circuit is formed by the external battery and the second direct current electric equipment through the reversible PWM rectifier, the motor coil and the energy conversion device;
the energy conversion device selects the first direct current discharge circuit or the third direct current discharge circuit to work according to an external control signal;
or the energy conversion device selects the first direct current discharge circuit and the third direct current discharge circuit to work simultaneously or in a time-staggered mode according to an external control signal.
14. The energy conversion device according to claim 11, wherein the energy conversion device comprises a first switch module, a second switch module, a third switch module, a fourth switch module and a first capacitor, wherein the positive terminal and the negative terminal of the external battery are respectively connected to the first terminal and the second terminal of the first switch module, the third terminal of the first switch module is connected to the first terminal and the first bus terminal of the first capacitor, the fourth terminal of the first switch module is connected to the second terminal and the second bus terminal of the first capacitor, the first terminal of the second switch module is connected to the first switch, the second terminal of the second switch module is connected to the second bus terminal, the third terminal and the fourth terminal of the second switch module are respectively connected to the first terminal and the second terminal of the external first dc port, and the first terminal and the second terminal of the external second dc port are respectively connected to the first terminal and the second terminal of the third switch module, the third end and the fourth end of the third switch module are respectively connected with the first bus end and the second bus end, the first end of the fourth switch module is connected with the second switch, the second end of the fourth switch module is connected with the second bus end, and the third end and the fourth end of the fourth switch module are respectively connected with the first end and the second end of an external third direct current port.
15. The energy conversion device of claim 1, wherein the reversible PWM rectifier comprises a set of M1The motor coil comprises a first winding unit and a second winding unit;
the first winding unit comprises a set of m1A phase winding of m1Each of the phase windings includes n1A coil branch of n for each phase winding1The coil branches are connected together to form a phase terminal point, m1Phase end point of phase winding and M1M in road bridge arm1The middle points of each path of bridge arm of the path bridge arms are connected in a one-to-one correspondence manner, and m is1N of each of the phase windings1One of the coil branches is also respectively connected with n of other phase windings1One of the coil branches is connected to form n1A connection point, said n1A connection point forming T1A neutral point, said T1Each neutral point leads out a first neutral line, where m1≥2，n1≥T1N is not less than 11，m1，T1Are all integers;
the second winding unit comprises a set of m2A phase winding of m2Each of the phase windings includes n2A coil branch of n for each phase winding2The coil branches are connected together to form a phase terminal point, m2Phase end point of phase winding and M1M in road bridge arm2The middle points of each path of bridge arm of the path bridge arms are connected in a one-to-one correspondence manner, and m is2N of each of the phase windings2One of the coil branches is also respectively connected with n of other phase windings2One of the coil branches is connected to form n2A connection point, said n2A connection point forming T2A neutral point, said T2A second neutral line is led out from the neutral point, wherein m2≥2，M1≥m1+m2，n2≥T2N is not less than 11，m1，M1，T2Are all integers.
16. The energy conversion device of claim 15, wherein n is1＝n2When 1, the first winding unit comprises a first connection point, the first connection point forms a first independent neutral point, the first independent neutral point leads out a first neutral line, the second winding unit comprises a second connection point, the second connection point forms a second independent neutral point, and the second independent neutral point leads out a second neutral line.
17. The energy conversion device of claim 15, wherein n is1＝n2And when the current is more than or equal to 2, the first winding unit comprises two connection points, wherein 1 connection point forms a first independent neutral point, a first neutral line is led out from the first independent neutral point, the second winding unit comprises two connection points, a second independent neutral point is formed from 1 connection point, and a second neutral line is led out from the second independent neutral point.
18. The energy conversion device of claim 15, wherein a neutral point of the first winding unit is connected with a neutral point of the second winding unit in a common way, and then a neutral line is led out to be connected with the external first direct current port.
19. An energy conversion device, comprising:
an energy storage connection comprising a first energy storage connection and a second storage connection;
a first bus end of the reversible PWM rectifier is connected with the first energy storage connecting end, and a second bus end of the reversible PWM rectifier is connected with the second energy storage connecting end;
the motor comprises a plurality of sets of winding units, and the motor coil is connected with the reversible PWM rectifier;
and the charging connection end group comprises a first charging connection end and a second charging connection end, the first charging connection end is connected with at least one set of winding unit of the motor coil, and the second charging connection end is connected with the second confluence end.
20. A vehicle characterized by further comprising the energy conversion apparatus of any one of claims 1 to 19.
CN201910755479.2A 2019-08-15 2019-08-15 Energy conversion device and vehicle Active CN112389230B (en)

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CN105991040A (en) * 2015-02-10 2016-10-05 神华集团有限责任公司 Frequency converter power unit and frequency converter
CN106394277A (en) * 2015-07-30 2017-02-15 Ls 产电株式会社 Apparatus for controlling charging/discharging of battery
CN107627881A (en) * 2017-09-18 2018-01-26 电子科技大学 A kind of discharge and recharge of electric automobile and motor driving integrated apparatus
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013011483A1 (en) * 2012-07-17 2014-01-23 Fanuc Corporation Drive device for a motor with a storage unit for electrical energy
CN105991040A (en) * 2015-02-10 2016-10-05 神华集团有限责任公司 Frequency converter power unit and frequency converter
CN106394277A (en) * 2015-07-30 2017-02-15 Ls 产电株式会社 Apparatus for controlling charging/discharging of battery
CN107627881A (en) * 2017-09-18 2018-01-26 电子科技大学 A kind of discharge and recharge of electric automobile and motor driving integrated apparatus
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