CN116923135A - Vehicle-mounted integrated charging system and method for six-phase motor compatible AC/DC charging pile - Google Patents

Vehicle-mounted integrated charging system and method for six-phase motor compatible AC/DC charging pile Download PDF

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Publication number
CN116923135A
CN116923135A CN202311044605.6A CN202311044605A CN116923135A CN 116923135 A CN116923135 A CN 116923135A CN 202311044605 A CN202311044605 A CN 202311044605A CN 116923135 A CN116923135 A CN 116923135A
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CN
China
Prior art keywords
phase
bridge
phase half
switch tube
power switch
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CN202311044605.6A
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Chinese (zh)
Inventor
张千帆
魏振
邵猛
张熹
李翰林
光涵
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Zhengzhou Research Institute Of Harbin Institute Of Technology
Harbin Institute of Technology
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Zhengzhou Research Institute Of Harbin Institute Of Technology
Harbin Institute of Technology
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Priority to CN202311044605.6A priority Critical patent/CN116923135A/en
Publication of CN116923135A publication Critical patent/CN116923135A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • 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
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Inverter Devices (AREA)

Abstract

A vehicle-mounted integrated charging system and method for a six-phase motor compatible AC/DC charging pile relates to the field of AC/DC charging of six-phase motor winding multiplexing. The invention solves the problem that the inductance value of the equivalent filtering inductance at the network side of the traditional integrated charging system is smallerThe questions are given. The invention change-over switch K 1 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge; change-over switch K 2 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge in the second three-phase half-bridge inverter; in the charging mode, through the switching switch K 1 And K 2 The switching state of the power switch tube of the six-phase inverter and the switching state of the power switch tube of the six-phase inverter are controlled, the wiring mode between the six-phase inverter and the six-phase winding of the six-phase motor is changed, and the inductance value of the equivalent filter inductance at the network side in the charging mode is improved. The invention is mainly used for multiplexing the six-phase motor windings and is mainly used for multiplexing driving and charging.

Description

Vehicle-mounted integrated charging system and method for six-phase motor compatible AC/DC charging pile
Technical Field
The invention relates to the field of alternating current and direct current charging of six-phase motor winding multiplexing.
Background
For an integrated charging system which multiplexes a six-phase permanent magnet synchronous motor and a matched driving inverter thereof into a single-phase and direct-current input power supply compatible with a corresponding network-side filter inductor and a power converter in a charging mode, the prior art is that zero-sequence current is injected into six windings in the charging mode, so that the motor can be prevented from rotating during charging, and particularly, referring to fig. 3 and 4. The winding inductance acting as filtering action at the net side in the charging mode is winding leakage inductance of the motor, and for a three-parallel inverter system, the equivalent filtering inductance value at the net side is about two thirds of that of one winding leakage inductance value under the condition of single-phase and direct-current input power supply. An excessively low equivalent grid-side inductance will reduce the quality of the electrical energy injected into the grid, manifesting as an increase in the harmonics of the grid-side current, while excessively large current harmonics can exacerbate losses in switching devices such as motors and inverters. The above problems need to be solved.
Disclosure of Invention
The invention aims to solve the problem of smaller inductance value of equivalent filtering inductance at the network side of a traditional integrated charging system, and provides a vehicle-mounted integrated charging system and method for a six-phase motor compatible with an alternating-current/direct-current charging pile.
The vehicle-mounted integrated charging system of the six-phase motor compatible AC/DC charging pile comprises a battery, a bidirectional DC-DC converter and a capacitor C which are sequentially connected in parallel from left to right dc A six-phase inverter and a six-phase motor;
the six-phase inverter comprises two three-phase half-bridge inverters which are formed by power switching tubes and are connected in parallel, and the three-phase half-bridge inverters are respectively defined as a first three-phase half-bridge inverter and a second three-phase half-bridge inverter;
the charging system also comprises a change-over switch K 1 And K 2 ；
Change-over switch K 1 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge; change-over switch K 2 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge in the second three-phase half-bridge inverter;
change-over switch K 1 Crossing point between one end of the first half-bridge and the upper arm of the a-phase half-bridge in the first three-phase half-bridge inverter, and change-over switch K 2 The intersection point between one end of the (a) phase half bridge and the upper bridge arm of the a phase half bridge in the second three-phase half bridge inverter is respectively used as two charging ends of the charging system and is connected with two power supply ends of the charging pile; the charging pile is a single-phase alternating current power supply or a direct current power supply;
in the charging mode, through the switching switch K 1 And K 2 The switching state of the power switch tube of the six-phase inverter and the switching state of the power switch tube of the six-phase inverter are controlled, the wiring mode between the six-phase inverter and the six-phase winding of the six-phase motor is changed, and the inductance value of the net-side equivalent filter inductance in the charging mode is improved, wherein the leakage inductance of the six-phase winding of the six-phase motor is equivalent to the net-side equivalent filter inductance.
Preferably, when the charging system is in a charging mode and the charging piles connected to two charging ends of the charging system are single-phase alternating current power sources, the six-phase inverter is multiplexed into a rectifier bridge of single-phase PFC, and the whole formed by leakage inductance and resistance of six-phase windings of the six-phase inverter and the six-phase motor is multiplexed into an AC-DC converter;
when the charging system is in a charging mode and the charging piles connected to the two charging ends of the charging system are direct-current power sources, the whole formed by leakage inductance and resistance of the six-phase inverter and the six-phase winding of the six-phase motor is multiplexed into a boost DC-DC converter.
Preferably, the first and second three-phase half-bridge inverters each comprise an a-phase half-bridge, a b-phase half-bridge and a c-phase half-bridge connected in parallel;
the a-phase half bridge of the first three-phase half bridge inverter comprises a power switch tube S a1 And S' a1 Power switch tube S a1 Source electrode of (C) and power switch tube S' a1 The intersection point of the drain electrode connection of the first three-phase half-bridge inverter is taken as a bridge arm midpoint a of an a-phase half-bridge of the first three-phase half-bridge inverter 1 ；
The b-phase half-bridge of the first three-phase half-bridge inverter comprises a power switch tube S b1 And S' b1 Power switch tube S a1 Source electrode of (C) and power switch tube S' b1 The intersection of the drain connections of the first three-phase half-bridge inverter is taken as the bridge arm midpoint b of the b-phase half bridge of the first three-phase half-bridge inverter 1 ；
The c-phase half-bridge of the first three-phase half-bridge inverter comprises a power switch tube S c1 And S' c1 Power switch tube S c1 Source electrode of (C) and power switch tube S' c1 The intersection point of the drain electrode connection is taken as the bridge arm midpoint c of the c-phase half bridge 1 ；
Power switch tube S a1 Drain of (d) and switch K 1 The intersection point of the two is used as a charging end of the charging system; change-over switch K 1 And the other end of the power switch tube S b1 Drain electrode of (d) and power switch tube S c1 The drains of the two are connected at the same time;
power switch tube S' a1 Source electrode of (C) power switch tube S' b1 Source and power switch tube S' c1 The sources of the electrodes are connected at the same time;
the a-phase half bridge of the second three-phase half bridge inverter comprises a power switch tube S a2 And S' a2 Power switch tube S a2 Source electrode of (C) and power switch tube S' a2 Is connected with the drain electrode ofThe intersection point is taken as a bridge arm midpoint a of an a-phase half bridge of the second three-phase half bridge inverter 2 ；
The b-phase half-bridge of the second three-phase half-bridge inverter comprises a power switch tube S b2 And S' b2 Power switch tube S b2 Source electrode of (C) and power switch tube S' b2 The intersection of the drain connections of the second three-phase half-bridge inverter is taken as the bridge arm midpoint b of the b-phase half bridge of the second three-phase half-bridge inverter 2 ；
The c-phase half-bridge of the second three-phase half-bridge inverter comprises a power switch tube S c2 And S' c2 Power switch tube S c2 Source electrode of (C) and power switch tube S' c2 The intersection of the drain connections of the second three-phase half-bridge inverter is taken as the bridge arm midpoint c of the c-phase half bridge of the second three-phase half-bridge inverter 2 ；
Power switch tube S a2 Drain of (d) and switch K 2 The intersection point of the two is used as the other charging end of the charging system; change-over switch K 2 And the other end of the power switch tube S b2 Drain electrode of (d) and power switch tube S c2 The drains of the two are connected at the same time;
power switch tube S' a2 Source electrode of (C) power switch tube S' b2 Source and power switch tube S' c2 The sources of the electrodes are connected at the same time;
power switch tube S c1 Drain electrode of (d) and power switch tube S c2 Drain electrode connection of power switch tube S' c1 Source electrode of (C) and power switch tube S' c2 Is connected to the source of the (c).
Preferably, the six-phase motor is a six-phase permanent magnet synchronous motor, and leakage inductance of six-phase windings of the six-phase motor is L respectively eqa1 、L eqb1 、L eqc1 、L eqa2 、L eqb2 And L eqc2 The method comprises the steps of carrying out a first treatment on the surface of the The resistances of the six-phase windings of the six-phase motor are R respectively a1 、R b1 、R c1 、R a2 、R b2 And R is c2 ；
Bridge arm midpoint a of a-phase half bridge of a first three-phase half bridge inverter 1 And leakage inductance L eqa1 Is connected with one end of the leakage inductance L eqa1 And the other end of (2) is connected with resistor R a1 Is connected with one end of the connecting rod;
bridge arm midpoint b of b-phase half bridge of first three-phase half bridge inverter 1 And leakage inductance L eqb1 Is connected with one end of the leakage inductance L eqb1 And the other end of (2) is connected with resistor R b1 Is connected with one end of the connecting rod;
bridge arm midpoint c of c-phase half bridge of first three-phase half bridge inverter 1 And leakage inductance L eqc1 Is connected with one end of the leakage inductance L eqc1 And the other end of (2) is connected with resistor R c1 Is connected with one end of the connecting rod;
resistor R a1 The other end of (C) and the resistor R b1 And the other end of (2) and the resistor R c1 Is connected with the other end of the coil to serve as the first neutral point N of the six-phase winding of the six-phase motor 1 ；
Bridge arm midpoint a of a-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqa2 Is connected with one end of the leakage inductance L eqa2 And the other end of (2) is connected with resistor R a2 Is connected with one end of the connecting rod;
bridge arm midpoint b of the b-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqb2 Is connected with one end of the leakage inductance L eqb2 And the other end of (2) is connected with resistor R b2 Is connected with one end of the connecting rod;
bridge arm midpoint c of the c-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqc2 Is connected with one end of the leakage inductance L eqc2 And the other end of (2) is connected with resistor R c2 Is connected with one end of the connecting rod;
resistor R a2 The other end of (C) and the resistor R b2 And the other end of (2) and the resistor R c2 Is connected with the other end of the second neutral point N of the six-phase winding serving as the six-phase motor 2 。
Preferably, the charging system includes a driving mode and a charging mode;
when the switch K 1 Change-over switch K 2 All are in a closed state, and when each power switch tube in the six-phase inverter is in an on or off state, the charging system is in a driving mode;
when the switch K 1 Change-over switch K 2 All are in the off state, power switch tube S a1 And S is a2 All in a conducting state, power switch tube S' a1 And S' a2 And when the power switching tubes in the six-phase inverter are in the off state and the rest power switching tubes in the six-phase inverter are in the on or off state, the charging system is in a charging mode.
Preferably, the inductance value L of the net side equivalent filter inductance 1 ＝3L σs ；
Wherein L is σs The inductance value of the leakage inductance of any phase winding in the six-phase motor is the same.
Preferably, in the charging mode, the average torque of the six-phase motor is zero.
The charging method realized by the vehicle-mounted integrated charging system with the six-phase motor compatible with the AC/DC charging pile comprises the following steps:
make the change-over switch K 1 Change-over switch K 2 In an off state, power switching tube S a1 And S is a2 All in a conducting state, power switch tube S' a1 And S' a2 Each power switching tube remained in the six-phase inverter is in an on or off state and at the moment, the charging system is switched into a charging mode;
connecting two charging ends of the charging system with two power supply ends of the charging pile for charging; and under the condition that the rotor of the six-phase motor is not required to be positioned in the charging process, the rotor of the six-phase motor is ensured not to rotate.
The invention has the advantages that:
the invention improves the network side filter inductance of the integrated charging system based on the six-phase motor, and the method needs to additionally add two change-over switches. In the charging mode, a change-over switch is utilized to change the connection mode of six windings of the six-phase motor, so that the equivalent filter inductance at the network side is improved. The number of the additionally added change-over switches is small, and the switching process is simple.
According to the invention, after the connection mode of the six windings of the six-phase motor is changed, the motor windings are reconstructed, the value of the equivalent filter inductance at the net side in the charging mode can be improved, and meanwhile, the motor can be ensured not to rotate in the charging process without rotor positioning. The harmonic wave of the network side current can be restrained, meanwhile, the loss of the inside of the motor and the inverter switching device can be reduced, and the efficiency of the system is improved.
The change-over switch is arranged on the bridge arm of the inverter, the relatively fewer change-over switches can be used for carrying out winding reconstruction, and the equivalent filter inductance value after reconstruction is greatly improved. Nine-phase motor switches are arranged on a peripheral circuit, more switches are used for improving the inductance value of equivalent filtering waves, and only two extra switches are needed.
Compared with a net side equivalent filtering inductance value of a six-phase permanent magnet synchronous motor integrated charging system based on zero sequence current injection, the integrated charging system disclosed by the invention isThe lifting is 4.5 times.
The vehicle-mounted integrated charging system compatible with the alternating current and direct current charging piles for the six-phase motor supports the single-phase alternating current charging piles and the direct current charging piles. In the driving mode, switch K 1 And K 2 In the closed state, battery energy is supplied to the six-phase inverter through the bidirectional DC-DC converter to realize the drive of the six-phase motor. During charging, energy passes through a motor winding from a charging pile, and after bus voltage and input current are effectively controlled by a six-phase inverter, the energy is transmitted to a bidirectional DC-DC converter, and the bidirectional DC-DC converter provides wide-range voltage regulation capability and stably and safely transmits the input energy into a battery.
Drawings
Fig. 1 is a topology structure diagram of a vehicle-mounted integrated charging system of a six-phase motor compatible ac/dc charging pile according to the present invention;
FIG. 2 is a topologically equivalent inductance of the charging system of FIG. 1;
fig. 3 is a topology diagram of a conventional six-phase motor compatible ac/dc charging pile vehicle-mounted integrated charging system;
fig. 4 is a topologically equivalent inductance of the charging system shown in fig. 3.
FIG. 5 is a simulation result of motor torque under single phase AC power charging;
fig. 6 is a simulation result of motor torque under dc power charging.
In the accompanying drawings, u bat. For the voltage of the two ends of the battery, the bidirectional DC-DC converter consists of a capacitor C bat. Inductance L 0 Power switch tube S buck And S is boost Constitution, i L0 For flowing through inductance L 0 Current of u dc Is a capacitor C dc Bus voltage at both ends, i sa1 、i sb1 、i sc1 、i sa2 、i sb2 And i sc2 Leakage inductance L of six-phase windings respectively flowing through six-phase motor eqa1 、L eqb1 、L eqc1 、L eqa2 、L eqb2 And L eqc2 Current at P A And P B Respectively two charging ends of the charging system, P g1 And P g2 Two power supply ends, P, of a single-phase alternating current power supply respectively DC+ And P DC- Two power supply ends, i of the direct current power supply respectively DC I is the current output by the direct current power supply g The current output by the single-phase alternating current power supply is delta T, and the delta T is torque ripple peak value.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The vehicle-mounted integrated charging system compatible with the alternating current/direct current charging pile for the six-phase motor supports the single-phase alternating current charging pile and the direct current charging pile. In the driving mode, switch K 1 And K 2 In the closed state, battery energy is supplied to the six-phase inverter through the bidirectional DC-DC converter to realize the drive of the six-phase motor. During charging, energy passes through the motor winding from the charging pileAfter the six-phase inverter effectively controls bus voltage and input current, energy is transmitted to the bidirectional DC-DC converter, and the bidirectional DC-DC converter provides wide-range voltage regulation capability and stably and safely transmits the input energy into a battery.
Referring to fig. 1 and 2, a vehicle-mounted integrated charging system of the first embodiment, in which the six-phase motor compatible ac/DC charging pile includes a battery, a bidirectional DC-DC converter, and a capacitor C sequentially connected in parallel from left to right dc A six-phase inverter and a six-phase motor;
the six-phase inverter comprises two three-phase half-bridge inverters which are formed by power switching tubes and are connected in parallel, and the three-phase half-bridge inverters are respectively defined as a first three-phase half-bridge inverter and a second three-phase half-bridge inverter;
the charging system also comprises a change-over switch K 1 And K 2 ；
Change-over switch K 1 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge; change-over switch K 2 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge in the second three-phase half-bridge inverter;
change-over switch K 1 Crossing point between one end of the first half-bridge and the upper arm of the a-phase half-bridge in the first three-phase half-bridge inverter, and change-over switch K 2 The intersection point between one end of the (a) phase half bridge and the upper bridge arm of the a phase half bridge in the second three-phase half bridge inverter is respectively used as two charging ends of the charging system and is connected with two power supply ends of the charging pile; the charging pile is a single-phase alternating current power supply or a direct current power supply;
in the charging mode, through the switching switch K 1 And K 2 The switching state of the power switch tube of the six-phase inverter and the switching state of the power switch tube of the six-phase inverter are controlled, the wiring mode between the six-phase inverter and the six-phase winding of the six-phase motor is changed, and the inductance value of the net-side equivalent filter inductance in the charging mode is improved, wherein the leakage inductance of the six-phase winding of the six-phase motor is equivalent to the net-side equivalent filter inductance. Inductance value L of net side equivalent filter inductance 1 ＝3L σs The method comprises the steps of carrying out a first treatment on the surface of the Wherein L is σs Is the inductance value of the leakage inductance of any one phase winding in the six-phase motor, and the inductance of the leakage inductance of each phase winding in the six-phase motorThe values are all the same.
The power switching tube used by the six-phase inverter is an MOS tube.
In fig. 1, when the charging system is in a charging mode and the charging piles connected to two charging ends of the charging system are single-phase alternating current power sources, the six-phase inverter is multiplexed into a rectifier bridge of single-phase PFC, the whole formed by leakage inductance and resistance of six-phase windings of the six-phase inverter and the six-phase motor is multiplexed into an AC-DC converter, and alternating current is rectified into direct current; the bidirectional DC-DC converter has the function of regulating the output voltage of the battery side and adapting to batteries with different voltage classes.
When the charging system is in a charging mode and the charging piles connected to the two charging ends of the charging system are direct-current power sources, the whole formed by leakage inductance and resistance of the six-phase inverter and the six-phase winding of the six-phase motor is multiplexed into a boost DC-DC converter.
The bi-directional DC-DC converter of FIG. 1 includes a power switching tube S buck And S is boost Formed half-bridge module and capacitor C bat. And inductance L 0 The bi-directional DC-DC converter can provide a wide range of voltage regulation capability when the bus voltage u dc Higher than the battery voltage u bat When, S in half bridge module boost Keep off, S buck The switching operation is performed, and the bidirectional DC-DC converter is configured as a Buck circuit to reduce the bus voltage to the battery voltage to charge the battery.
In fig. 1, the six-phase inverter includes six half-bridges, a-phase, b-phase and c-phase half-bridges of the first and second three-phase half-bridge inverters, respectively;
the a-phase half bridge of the first three-phase half bridge inverter comprises a power switch tube S a1 And S' a1 Power switch tube S a1 Source electrode of (C) and power switch tube S' a1 The intersection point of the drain electrode connection of the first three-phase half-bridge inverter is taken as a bridge arm midpoint a of an a-phase half-bridge of the first three-phase half-bridge inverter 1 ；
The b-phase half-bridge of the first three-phase half-bridge inverter comprises a power switch tube S b1 And S' b1 Power switch tube S a1 Source electrode of (C) and power switch tube S' b1 As the first thirdBridge arm midpoint b of b-phase half bridge of phase half bridge inverter 1 ；
The c-phase half-bridge of the first three-phase half-bridge inverter comprises a power switch tube S c1 And S' c1 Power switch tube S c1 Source electrode of (C) and power switch tube S' c1 The intersection point of the drain electrode connection is taken as the bridge arm midpoint c of the c-phase half bridge 1 ；
Power switch tube S a1 Drain of (d) and switch K 1 The intersection point of the two is used as a charging end of the charging system; change-over switch K 1 And the other end of the power switch tube S b1 Drain electrode of (d) and power switch tube S c1 The drains of the two are connected at the same time;
power switch tube S' a1 Source electrode of (C) power switch tube S' b1 Source and power switch tube S' c1 The sources of the electrodes are connected at the same time;
the a-phase half bridge of the second three-phase half bridge inverter comprises a power switch tube S a2 And S' a2 Power switch tube S a2 Source electrode of (C) and power switch tube S' a2 The intersection point of the drain electrode connection of the second three-phase half-bridge inverter is taken as a bridge arm midpoint a of the a-phase half bridge of the second three-phase half-bridge inverter 2 ；
The b-phase half-bridge of the second three-phase half-bridge inverter comprises a power switch tube S b2 And S' b2 Power switch tube S b2 Source electrode of (C) and power switch tube S' b2 The intersection of the drain connections of the second three-phase half-bridge inverter is taken as the bridge arm midpoint b of the b-phase half bridge of the second three-phase half-bridge inverter 2 ；
The c-phase half-bridge of the second three-phase half-bridge inverter comprises a power switch tube S c2 And S' c2 Power switch tube S c2 Source electrode of (C) and power switch tube S' c2 The intersection of the drain connections of the second three-phase half-bridge inverter is taken as the bridge arm midpoint c of the c-phase half bridge of the second three-phase half-bridge inverter 2 ；
Power switch tube S a2 Drain of (d) and switch K 2 The intersection point of the two is used as the other charging end of the charging system; change-over switch K 2 And the other end of the power switch tube S b2 Drain electrode of (d) and power switch tube S c2 Drain of (2)Simultaneously connecting;
power switch tube S' a2 Source electrode of (C) power switch tube S' b2 Source and power switch tube S' c2 The sources of the electrodes are connected at the same time;
power switch tube S c1 Drain electrode of (d) and power switch tube S c2 Drain electrode connection of power switch tube S' c1 Source electrode of (C) and power switch tube S' c2 Is connected to the source of the (c).
In fig. 1, K is charged for a six-phase inverter 1 And K 2 All are disconnected, S' a1 、S′ a2 Keep off, S a1 、S a2 Remain conductive. b 1 And c 1 The half bridge of the bridge arm is used in parallel, giving b 1 And c 1 The same switching signal of the half bridge is positioned; likewise, b 2 And c 2 The half bridge of the bridge arm is also used for the same switch signal in parallel.
The six-phase motor is a six-phase permanent magnet synchronous motor, and referring to fig. 1, leakage inductance of six-phase windings of the six-phase motor is L respectively eqa1 、L eqb1 、L eqc1 、L eqa2 、L eqb2 And L eqc2 The method comprises the steps of carrying out a first treatment on the surface of the The resistances of the six-phase windings of the six-phase motor are R respectively a1 、R b1 、R c1 、R a2 、R b2 And R is c2 The method comprises the steps of carrying out a first treatment on the surface of the The six-phase motor comprises six-phase windings and a first neutral point N 1 The equivalent leakage inductance of the connected three-phase windings is L respectively eqa1 、L eqb1 、L eqc1 The method comprises the steps of carrying out a first treatment on the surface of the Likewise, with the second neutral point N 2 The equivalent leakage inductance of the connected three-phase windings is L respectively eqa2 、L eqb2 And L eqc2 。
In fig. 1, the bridge arm midpoint a of the a-phase half bridge of the first three-phase half bridge inverter 1 And leakage inductance L eqa1 Is connected with one end of the leakage inductance L eqa1 And the other end of (2) is connected with resistor R a1 Is connected with one end of the connecting rod; bridge arm midpoint b of b-phase half bridge of first three-phase half bridge inverter 1 And leakage inductance L eqb1 Is connected with one end of the leakage inductance L eqb1 And the other end of (2) is connected with resistor R b1 Is connected with one end of the connecting rod; bridge arm midpoint of c-phase half bridge of first three-phase half bridge inverterc 1 And leakage inductance L eqc1 Is connected with one end of the leakage inductance L eqc1 And the other end of (2) is connected with resistor R c1 Is connected with one end of the connecting rod;
resistor R a1 The other end of (C) and the resistor R b1 And the other end of (2) and the resistor R c1 Is connected with the other end of the coil to serve as the first neutral point N of the six-phase winding of the six-phase motor 1 ；
Bridge arm midpoint a of a-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqa2 Is connected with one end of the leakage inductance L eqa2 And the other end of (2) is connected with resistor R a2 Is connected with one end of the connecting rod; bridge arm midpoint b of the b-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqb2 Is connected with one end of the leakage inductance L eqb2 And the other end of (2) is connected with resistor R b2 Is connected with one end of the connecting rod; bridge arm midpoint c of the c-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqc2 Is connected with one end of the leakage inductance L eqc2 And the other end of (2) is connected with resistor R c2 Is connected with one end of the connecting rod;
resistor R a2 The other end of (C) and the resistor R b2 And the other end of (2) and the resistor R c2 Is connected with the other end of the second neutral point N of the six-phase winding serving as the six-phase motor 2 。
The vehicle-mounted integrated charging system compatible with the alternating-current/direct-current charging pile by the six-phase motor comprises a driving mode and a charging mode;
when the switch K 1 Change-over switch K 2 All the power switching tubes in the six-phase inverter are in a closed state, all the power switching tubes in the six-phase inverter are in an on or off state, and the charging system is in a driving mode;
when the switch K 1 Change-over switch K 2 All are in the off state, power switch tube S a1 And S is a2 All in a conducting state, power switch tube S' a1 And S' a2 And when the power switching tubes in the six-phase inverter are in the off state and the rest power switching tubes in the six-phase inverter are in the on or off state, the charging system is in a charging mode.
And the six-phase motor is compatible with the vehicle-mounted integrated charging system of the alternating current/direct current charging pile, and the average torque of the six-phase motor is zero in a charging mode.
Referring to fig. 1 and fig. 2, a charging method implemented by a vehicle-mounted integrated charging system using the six-phase motor compatible ac/dc charging pile according to the second embodiment of the present invention is described, and the method includes the following steps:
make the change-over switch K 1 Change-over switch K 2 In an off state, power switching tube S a1 And S is a2 All in a conducting state, power switch tube S' a1 And S' a2 The power switching tubes are in an off state, and the rest power switching tubes in the six-phase inverter are in an on or off state, so that the charging system is switched into a charging mode;
connecting two charging ends of the charging system with two power supply ends of the charging pile for charging; and under the condition that the rotor of the six-phase motor is not required to be positioned in the charging process, the rotor of the six-phase motor is ensured not to rotate.
When the electric vehicle is particularly applied, the electric vehicle is stopped near the charging pile, and then the vehicle owner judges the type of the charging pile.
If the charging pile is of single-phase alternating current type, a switch K 1 And K 2 The phases need to be all disconnected. At the same time, S 'in six-phase inverter' a1 And S' a2 Are all in an off state S a1 And S is a2 Are all in an on state. P of single-phase charging gun g1 And P g2 The terminals being inserted into corresponding positions of the driver, i.e. P of the inverter g1 And P g2 And a terminal, wherein the single-phase integrated charging circuit is configured and can start charging.
If the charging pile is of single-phase alternating current type, a switch K 1 And K 2 All disconnection is required. At the same time, S 'in six-phase inverter' a1 And S' a2 Are all in an off state S a1 And S is a2 Are all in an on state. P of single-phase alternating-current charging gun g1 And P g2 Terminals are respectively inserted into two charging ends P of the charging system A And P B At this point the single-phase integrated charging circuit completes configuration and may begin charging.
If the charging pile is of a direct current type, a switch K 1 、K 2 All disconnection is required. At the same time, S 'in six-phase inverter' a1 And S' a2 All that is required is in the off state S a1 And S is a2 Are all in an on state. P of direct current charging gun DC+ And P DC- Terminals are respectively inserted into two charging ends P of the charging system A And P B At this time, the dc integrated charging circuit completes configuration and can start charging.
During charging, energy passes through a motor winding from a charging pile, and after bus voltage and input current are effectively controlled by a six-phase inverter, the energy is transmitted to a bidirectional DC-DC converter, and the bidirectional DC-DC converter provides wide-range voltage regulation capability and stably and safely transmits the input energy into a battery.
For the vehicle-mounted integrated charging system compatible with the alternating-current and direct-current charging pile for the six-phase motor, which is provided by the invention, the winding is reconstructed and then shown in figure 2. The winding filter inductance and the net side equivalent filter inductance are shown in the following formula 1 after deduction. To connect with the first neutral point N 1 For example, there is the following expression, wherein L σs The inductance value of the leakage inductance of any phase winding in the six-phase permanent magnet synchronous motor is the same.
Wherein L is eqb1 And L is equal to eqc1 In parallel with L eqa1 In series, therefore, the first neutral point N can be deduced 1 The equivalent inductance of the side is:
similarly, a first neutral point N 2 The equivalent inductance of the side is:
therefore, for the integrated charging system provided by the invention, the net side equivalent filter inductance value is as follows:
L 1 ＝L N1 +L N2 ＝3L σs (4)；
whereas for an integrated charging topology with zero sequence current injection, the winding reconstruction is shown in fig. 4. To connect N 1 For example, three-phase windings of L eqb1 And L is equal to eqc1 And L is equal to eqa1 In parallel, therefore, N can be derived 1 The equivalent inductance of the side is:
similarly, N 2 The equivalent inductance of the side is:
therefore, for the integrated charging system provided by the invention, the net side equivalent filter inductance value is as follows:
from the above derivation, it can be derived that:
compared with the net-side equivalent filtering inductance value of the six-phase permanent magnet synchronous motor integrated charging system based on zero-sequence current injection, the multiplexing scheme of the invention can be seenThe lifting is 4.5 times.
Referring to fig. 5 and 6, a torque simulation result of a vehicle-mounted integrated charging system based on the six-phase motor compatible alternating current-direct current charging pile is given under the condition of charging power of 6.6 kW. It can be seen that the motor average torque in the various multiplexing modes is zero and the instantaneous torque ripple peak-to-peak ratio average torque is small.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims (8)

1. The vehicle-mounted integrated charging system of the six-phase motor compatible AC/DC charging pile comprises a battery, a bidirectional DC-DC converter and a capacitor C which are sequentially connected in parallel from left to right dc A six-phase inverter and a six-phase motor;
the six-phase inverter comprises two three-phase half-bridge inverters which are formed by power switching tubes and are connected in parallel, and the three-phase half-bridge inverters are respectively defined as a first three-phase half-bridge inverter and a second three-phase half-bridge inverter;
the charging system is characterized by further comprising a change-over switch K 1 And K 2 ；
Change-over switch K 1 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge; change-over switch K 2 The first three-phase half-bridge inverter is arranged between an upper bridge arm of an a-phase half-bridge and an upper bridge arm of a b-phase half-bridge in the second three-phase half-bridge inverter;
change-over switch K 1 Crossing point between one end of the first half-bridge and the upper arm of the a-phase half-bridge in the first three-phase half-bridge inverter, and change-over switch K 2 The intersection point between one end of the (a) phase half bridge and the upper bridge arm of the a phase half bridge in the second three-phase half bridge inverter is respectively used as two charging ends of the charging system and is connected with two power supply ends of the charging pile; the charging pile is a single-phase alternating current power supply or a direct current power supply;
in the charging mode, through the switching switch K 1 And K 2 The switching state of the power switch tube of the six-phase inverter and the switching state of the power switch tube of the six-phase inverter are controlled, the wiring mode between the six-phase inverter and the six-phase winding of the six-phase motor is changed, and the inductance value of the net-side equivalent filter inductance in the charging mode is improved, wherein the leakage inductance of the six-phase winding of the six-phase motor is equivalent to the net-side equivalent filter inductance.
2. The vehicle-mounted integrated charging system compatible with the alternating current and direct current charging piles of the six-phase motor according to claim 1, wherein when the charging system is in a charging mode and the charging piles connected to two charging ends of the charging system are single-phase alternating current power sources, the six-phase inverter is multiplexed into a rectifier bridge of single-phase PFC, and the six-phase inverter and the whole body formed by leakage inductance and resistance of a six-phase winding of the six-phase motor are multiplexed into an AC-DC converter;
when the charging system is in a charging mode and the charging piles connected to the two charging ends of the charging system are direct-current power sources, the whole formed by leakage inductance and resistance of the six-phase inverter and the six-phase winding of the six-phase motor is multiplexed into a boost DC-DC converter.
3. The vehicle-mounted integrated charging system of a six-phase motor-compatible ac-dc charging stake of claim 1, wherein the first and second three-phase half-bridge inverters each include a-phase half-bridge, b-phase half-bridge, and c-phase half-bridge connected in parallel;
the a-phase half bridge of the first three-phase half bridge inverter comprises a power switch tube S a1 And S' a1 Power switch tube S a1 Source electrode of (C) and power switch tube S' a1 The intersection point of the drain electrode connection of the first three-phase half-bridge inverter is taken as a bridge arm midpoint a of an a-phase half-bridge of the first three-phase half-bridge inverter 1 ；
The b-phase half-bridge of the first three-phase half-bridge inverter comprises a power switch tube S b1 And S' b1 Power switch tube S a1 Source electrode of (C) and power switch tube S' b1 The intersection of the drain connections of the first three-phase half-bridge inverter is taken as the bridge arm midpoint b of the b-phase half bridge of the first three-phase half-bridge inverter 1 ；
The c-phase half-bridge of the first three-phase half-bridge inverter comprises a power switch tube S c1 And S' c1 Power switch tube S c1 Source electrode of (C) and power switch tube S' c1 The intersection point of the drain electrode connection is taken as the bridge arm midpoint c of the c-phase half bridge 1 ；
Power switch tube S a1 Drain of (d) and switch K 1 The intersection point of the two is used as a charging end of the charging system; change-over switch K 1 And the other end of the power switch tube S b1 Drain electrode of (d) and power switch tube S c1 The drains of the two are connected at the same time;
power switch tube S' a1 Source electrode of (C) power switch tube S' b1 Source and power switch tube S' c1 The sources of the electrodes are connected at the same time;
the a-phase half bridge of the second three-phase half bridge inverter comprises a power switch tube S a2 And S' a2 Power switch tube S a2 Source electrode of (C) and power switch tube S' a2 The intersection point of the drain electrode connection of the second three-phase half-bridge inverter is taken as a bridge arm midpoint a of the a-phase half bridge of the second three-phase half-bridge inverter 2 ；
The b-phase half-bridge of the second three-phase half-bridge inverter comprises a power switch tube S b2 And S' b2 Power switch tube S b2 Source electrode of (C) and power switch tube S' b2 The intersection of the drain connections of the second three-phase half-bridge inverter is taken as the bridge arm midpoint b of the b-phase half bridge of the second three-phase half-bridge inverter 2 ；
The c-phase half-bridge of the second three-phase half-bridge inverter comprises a power switch tube S c2 And S' c2 Power switch tube S c2 Source electrode of (C) and power switch tube S' c2 The intersection of the drain connections of the second three-phase half-bridge inverter is taken as the bridge arm midpoint c of the c-phase half bridge of the second three-phase half-bridge inverter 2 ；
Power switch tube S a2 Drain of (d) and switch K 2 The intersection point of the two is used as the other charging end of the charging system; change-over switch K 2 And the other end of the power switch tube S b2 Drain electrode of (d) and power switch tube S c2 The drains of the two are connected at the same time;
power switch tube S' a2 Source, power of (a)Switch tube S' b2 Source and power switch tube S' c2 The sources of the electrodes are connected at the same time;
power switch tube S c1 Drain electrode of (d) and power switch tube S c2 Drain electrode connection of power switch tube S' c1 Source electrode of (C) and power switch tube S' c2 Is connected to the source of the (c).
4. A vehicle-mounted integrated charging system compatible with alternating current and direct current charging piles according to claim 1 or 3, wherein the six-phase motor is a six-phase permanent magnet synchronous motor, and leakage inductances of six-phase windings of the six-phase motor are respectively L eqa1 、L eqb1 、L eqc1 、L eqa2 、L eqb2 And L eqc2 The method comprises the steps of carrying out a first treatment on the surface of the The resistances of the six-phase windings of the six-phase motor are R respectively a1 、R b1 、R c1 、R a2 、R b2 And R is c2 ；
Bridge arm midpoint a of a-phase half bridge of a first three-phase half bridge inverter 1 And leakage inductance L eqa1 Is connected with one end of the leakage inductance L eqa1 And the other end of (2) is connected with resistor R a1 Is connected with one end of the connecting rod;
bridge arm midpoint b of b-phase half bridge of first three-phase half bridge inverter 1 And leakage inductance L eqb1 Is connected with one end of the leakage inductance L eqb1 And the other end of (2) is connected with resistor R b1 Is connected with one end of the connecting rod;
bridge arm midpoint c of c-phase half bridge of first three-phase half bridge inverter 1 And leakage inductance L eqc1 Is connected with one end of the leakage inductance L eqc1 And the other end of (2) is connected with resistor R c1 Is connected with one end of the connecting rod;
resistor R a1 The other end of (C) and the resistor R b1 And the other end of (2) and the resistor R c1 Is connected with the other end of the coil to serve as the first neutral point N of the six-phase winding of the six-phase motor 1 ；
Bridge arm midpoint a of a-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqa2 Is connected with one end of the leakage inductance L eqa2 And the other end of (2) is connected with resistor R a2 Is connected with one end of the connecting rod;
bridge arm midpoint b of the b-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqb2 Is connected with one end of the leakage inductance L eqb2 And the other end of (2) is connected with resistor R b2 Is connected with one end of the connecting rod;
bridge arm midpoint c of the c-phase half bridge of the second three-phase half bridge inverter 2 And leakage inductance L eqc2 Is connected with one end of the leakage inductance L eqc2 And the other end of (2) is connected with resistor R c2 Is connected with one end of the connecting rod;
resistor R a2 The other end of (C) and the resistor R b2 And the other end of (2) and the resistor R c2 Is connected with the other end of the second neutral point N of the six-phase winding serving as the six-phase motor 2 。
5. The vehicle-mounted integrated charging system of the six-phase motor compatible alternating current-direct current charging pile of claim 3, wherein the charging system comprises a driving mode and a charging mode;
when the switch K 1 Change-over switch K 2 All are in a closed state, and when each power switch tube in the six-phase inverter is in an on or off state, the charging system is in a driving mode;
when the switch K 1 Change-over switch K 2 All are in the off state, power switch tube S a1 And S is a2 All in a conducting state, power switch tube S' a1 And S' a2 And when the power switching tubes in the six-phase inverter are in the off state and the rest power switching tubes in the six-phase inverter are in the on or off state, the charging system is in a charging mode.
6. The vehicle-mounted integrated charging system of the six-phase motor compatible alternating current-direct current charging pile according to claim 1, wherein the inductance value L of the net-side equivalent filter inductance is 1 ＝3L σs ；
Wherein L is σs The inductance value of the leakage inductance of any phase winding in the six-phase motor is the same.
7. The vehicle-mounted integrated charging system of the six-phase motor compatible with the alternating current-direct current charging pile according to claim 1, wherein in the charging mode, the average torque of the six-phase motor is zero.
8. The charging method realized by the vehicle-mounted integrated charging system of the six-phase motor compatible alternating current/direct current charging pile as claimed in claim 1, which is characterized by comprising the following steps:
make the change-over switch K 1 Change-over switch K 2 In an off state, power switching tube S a1 And S is a2 All in the on state, power switch tube S a ′ 1 And S is a ′ 2 Each power switching tube remained in the six-phase inverter is in an on or off state and at the moment, the charging system is switched into a charging mode;
connecting two charging ends of the charging system with two power supply ends of the charging pile for charging; and under the condition that the rotor of the six-phase motor is not required to be positioned in the charging process, the rotor of the six-phase motor is ensured not to rotate.
CN202311044605.6A 2023-08-18 2023-08-18 Vehicle-mounted integrated charging system and method for six-phase motor compatible AC/DC charging pile Pending CN116923135A (en)

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