EP3682536A1 - Voltage converter on board a motor vehicle and associated electric charger - Google Patents
Voltage converter on board a motor vehicle and associated electric chargerInfo
- Publication number
- EP3682536A1 EP3682536A1 EP18782780.3A EP18782780A EP3682536A1 EP 3682536 A1 EP3682536 A1 EP 3682536A1 EP 18782780 A EP18782780 A EP 18782780A EP 3682536 A1 EP3682536 A1 EP 3682536A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- converter
- transistor
- cells
- cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002955 isolation Methods 0.000 claims abstract description 67
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 description 99
- 230000010363 phase shift Effects 0.000 description 7
- 210000003771 C cell Anatomy 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
-
- 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
- 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
- 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
- H02M3/1584—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 with a plurality of power processing stages connected in parallel
-
- 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
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
-
- 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
- H02M3/1584—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 with a plurality of power processing stages connected in parallel
- H02M3/1586—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 with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Definitions
- the present invention relates to the electrical charge of a battery of an equipment from an electric or hybrid motor vehicle.
- the invention relates in particular to a voltage converter on board an electric or hybrid motor vehicle, configured to perform an additional function of electric charger.
- motor vehicles are equipped with a DC / DC voltage converter configured to convert a first input voltage, for example 48 V, into a second output voltage, for example 12 V.
- the motor vehicles can, also in known manner, be equipped with a battery charger for charging the battery of a device with a third output voltage different or not the second voltage, said third voltage can be by example of 48 V, 24 V or 12 V.
- a voltage converter on board a motor vehicle for converting a first voltage into a second voltage different from the first, comprising:
- control circuit being configured to selectively keep said at least one isolation transistor K3-R open to decouple a cell from the plurality of cells and use the arm of said cell to provide a third output voltage.
- the isolation transistor makes it possible to protect itself in case of reverse polarity of the second voltage.
- the isolation transistor K3-R is used as an electronic switch that can be open (switch off) or closed (switch on).
- the first voltage is provided by an electrical network which can be for example a battery.
- the opening of the isolation transistor K3-R makes it possible to decouple the arm of said cell from the other cells which make it possible to supply the second voltage.
- said at least one isolation transistor belongs to one of said plurality of cells.
- said at least one isolation transistor is connected via an inductor to the mid-point of the transistor arm of the cell comprising said at least one isolation transistor.
- the cell comprising said at least one isolation transistor also comprises an inductor.
- the converter cells are arranged in parallel. In other words, the converter cells are electrically connected in parallel.
- cooling and the control circuit can be the same, which further contributes to reducing the size and the production costs.
- the third output voltage may or may not be equal to the first voltage.
- the third voltage may be used to charge a battery, for example a battery of equipment outside the motor vehicle such as a battery of an electric bicycle.
- the third voltage is equal to the first voltage, being for example both 48 V.
- the converter is then used as a charger.
- the third voltage is different from the first voltage.
- the converter is then a double output converter whose second output is used as a charger.
- the first voltage can be 48 V.
- the third voltage can be 12 V or 24 V.
- the converter according to the invention is used to provide a second voltage and / or a third voltage from a voltage supplied by a battery of the vehicle.
- the second voltage can be used to supply the motor vehicle's onboard network, for example to allow the use of a car radio or other equipment on board the vehicle.
- the third voltage can be used to power a battery, for example an electric bicycle battery which one wishes to charge in the vehicle, for example during driving or at a standstill.
- a battery for example an electric bicycle battery which one wishes to charge in the vehicle, for example during driving or at a standstill.
- the third output voltage may be less than 60 V, more preferably less than or equal to 48 V. In one embodiment, the third output voltage is 48 V or 24 V or 12 V.
- the third output voltage is a DC voltage, preferably less than 60V, better still less than or equal to 48 V. In a particular embodiment, the third DC output voltage is 48 V. In a particular embodiment, the third DC output voltage is 24V. In a particular embodiment, the third DC output voltage is 12V.
- the second output voltage may be less than 60 V, better still less than or equal to 48 V. In one embodiment, the second output voltage is 12 V or 24 V.
- the second output voltage is a DC voltage, preferably less than 60V, more preferably less than or equal to 48 V. In one embodiment, the second DC output voltage is 12V or 24V. .
- the aforementioned isolation transistor is according to the invention open to decouple said cell and use the arm of said chopper controlled cell to provide a third output voltage; in this case the converter is configured to provide the second and third output voltages simultaneously or not. It is also open in case of failure, playing its role of isolation.
- the corresponding cell When closed, the corresponding cell is used as the cell of a DC / DC voltage converter according to the prior art, all the cells of the converter for providing only the second voltage.
- the converter cells are arranged in parallel.
- the converter may comprise several cells, for example 2, 3, 4, 5 or 6.
- the converter only needs one or more cells of the plurality of cells to provide the second voltage, the other cells of the plurality of cells being unused. It is then advantageous to use the arm of an unused cell to provide a third voltage, both when the vehicle is running and at a standstill.
- each cell there are four cells arranged in parallel.
- the isolation transistor of each cell can be connected via an inductor to the midpoint of the transistor arm of each cell.
- the transistors of the cells are controlled in the same way as in a DC / DC voltage converter according to the prior art and controlled with the same operating cycle.
- One of the transistors of one arm of a cell is open, while the other is passing, and vice versa.
- the duty cycle within each of the cells is identical but the controls of the transistors are out of phase from T / x from one cell to another.
- the phase shift may for example be T / 4 or T / 3, depending on the open or closed state of the isolation transistor K3-R.
- the arm of the chopper-controlled cell is used to perform a charger function, in particular 48V, 24V or 12V, and the other cells of the plurality of cells to perform a converter function.
- a charger function in particular 48V, 24V or 12V
- the other cells of the plurality of cells to perform a converter function.
- the converter may comprise a capacitor C1 connected to the output of the converter cells.
- the capacitor C1 is connected to the output of the converter cells other than the cell whose arm is controlled chopper. In the case where this isolation transistor is closed, then said cell serves the converter to provide the second voltage, and the capacitor C1 is connected to the output of all the cells of the converter.
- Said capacitor C1 connected to the output of the converter cells may be unpolarized. It may especially be a ceramic capacitor.
- the value of the capacity must be increased. For example, for a two-cell converter, the capacity must be twice that required for a four-cell converter.
- At least one isolation transistor TR in English "reverse transistor” is associated with one or more cells of the plurality of cells. These transistors make it possible to guard against a reverse polarity of the second voltage.
- the converter may further comprise a safety transistor TS between said at least one isolation transistor TR and the output of the second voltage.
- These safety transistors make it possible to guard against variation of voltage on the network supplying the first voltage.
- the converter may comprise a safety transistor TS per cell of the converter.
- the converter may comprise one or more isolation transistors, for example 1, 2, 3, 4, 5 or 6. A large number of isolation transistors may make it possible to improve the power of the assembly. In an exemplary embodiment, there are four isolation transistors arranged in parallel, each connected to the output of the cells.
- the converter may further comprise an additional isolation transistor K4-R arranged directly upstream of the output of the third voltage.
- the converter may further comprise a capacitor C3 connected by one of its terminals to the additional isolation transistor K4-R.
- the capacitor C3 can be connected between the aforementioned safety transistor TS and the additional isolation transistor K4-R.
- the converter may further comprise an additional safety transistor K1-S upstream of the additional isolation transistor K4-R.
- the arm K5, K6 of said decouplable cell is controlled by a chopper to provide the third output voltage.
- the converter may furthermore comprise a transistor K2 forming, with the additional safety transistor Kl-S, an arm of transistors Kl-S, K2 controlled by a chopper-lift, this transistor arm K1.
- -S, K2 forming, with the arm K5, K6 of said decouplable cell, a step-up circuit (buck-boost).
- said additional safety transistor Kl-S is disposed directly at the output of said cell whose arm is controlled by chopping.
- the third voltage may be 12 V or 24 V. In the event of failure of an electronic component of the converter, there may be a disconnection of the load.
- the converter may further comprise a precharge transistor K7, the control circuit being configured to allow, when the precharge transistor K7 is open, to provide the second voltage and / or the third voltage, and when the precharge transistor K7 is closed, using the arm of said chopper-controlled cell as a single current conductor to supply a precharge current to the capacity of a network supplying the first voltage, see at one or more capacitors of the converter ..
- the isolation transistor K3-R and the additional isolation transistor K4-R are kept open while the precharge transistor K7 is kept closed.
- the invention further relates, independently or in combination with the foregoing, to a motor vehicle equipped with a converter as described above.
- the motor vehicle can be any electric or hybrid.
- the subject of the invention is also a method of feeding a battery by means of a converter according to the invention, this
- the converter comprises for this purpose, as described above, a control circuit (210) of the transistors.
- the process may comprise all or some of the features of the invention set out above.
- FIG. 1 illustrates a DC / DC converter electrical circuit
- FIG. 1 illustrates a main voltage converter 100 DC / DC configured to convert a first input voltage, for example 48 V, into a second output voltage, for example 12 V.
- the main voltage converter 100 comprises a bridge operating as a chopper, in a manner known per se. Such a converter is called "buck", and converts a DC voltage into another DC voltage of lower value. In an exemplary embodiment, it may be for example to convert a voltage of 48 V into a voltage of 12 V.
- the DC / DC converter 100 comprises 4 cells C arranged in parallel.
- the number of C cells could be different without departing from the scope of the present invention. It may for example be between 2 and 12, for example being 2, 3, 4, 5 or 6.
- the output capacitor C2 is unpolarized.
- Each cell C comprises a first transistor T1, a second transistor T2, and an inductor L1.
- the transistors T1 and T2 are MOSFETs.
- Such a converter 100 can be divided into two configurations depending on the state of the transistor T1.
- the transistor T1 In the on state, the transistor T1 is closed, the current flowing through the inductance L1 increases. The voltage across the second transistor T2 being negative, no current flows through it.
- transistor T1 In the off state, transistor T1 is open. The second transistor T2 becomes conducting in order to ensure the continuity of the current in the inductor L1. The current flowing through the inductor L1 decreases.
- the converter 100 includes isolation switches TR (in English "reverse"), connected directly to the output of the cell or C cells, allowing when closed to deliver the output voltage, and when open to protect the or C cells.
- isolation switches TR in English "reverse"
- the converter 100 also includes safety switches TS (in English “safety”), which are each connected in series with a corresponding isolation switch TR. These safety switches TS allow when closed to deliver the output voltage, and when open to protect the C-cell (s).
- safety switches TS in English "safety"
- isolation and safety switches are activated (as an open switch) if undervoltage or overvoltage, that is disturbances, occur on one of the input or output networks, as well as in the case of a hardware malfunction of the DC / DC converter, for example the failure of a transistor.
- Each pair of isolation and safety switches is connected in parallel with the others.
- the converter has 4 pairs of isolation and safety switches, which makes it possible to improve the power of the assembly, but it is not beyond the scope of the present invention if their number is different. , being for example 1, 2, 3, 5 or 6.
- the number of pairs of isolation and safety switches is equal to the number of cells of the converter.
- the isolation and safety switches are transistors, for example MOSFET transistors.
- All the transistors of the converter 100 are controlled by a controller 110 of the converter 100.
- FIG. 2 illustrates a voltage converter 200 on board a vehicle, comprising a plurality of cells C, each comprising an arm of chopped transistors T3, T4 for generating the second voltage and a control circuit 210 for the transistors.
- the converter comprises four cells C arranged in parallel and each of the cells C also comprises at least one isolation transistor TR (in English "reverse").
- only one or more of the cells C also comprises at least one isolation transistor TR.
- the isolation transistor TR of each cell can be connected via an inductor L2 to the midpoint of the transistor arm T3, T4 of each cell.
- the transistors T3, T4 of the cells are controlled by a control circuit 210 in the same way as in a simple converter, out of phase and controlled with the same operating cycle (i.e. the duty cycle is the same).
- One of the transistors of one arm of a cell is open, while the other is passing, and vice versa.
- control circuit 210 is configured to keep open or close the isolation transistor K3-R of one of the cells of the plurality of cells.
- the isolation transistor K3-R When the isolation transistor K3-R is closed, all the cells of the converter controlled by the control circuit 210 then make it possible to supply the second voltage. There is then a phase shift of T / 4 between the commands of the different cells.
- the isolation transistor K3-R When the isolation transistor K3-R is open, there is a decoupling of said cell and the arm of said chopper controlled cell is used to provide a third output voltage which is in the example described in FIG. V.
- the arm of the disconnected cell makes it possible to produce a voltage-reducing circuit.
- the mid-point of the transistor arm T3, T4 of this cell is connected to an inductor L2, the voltage-reducing circuit is of a type called "Buck".
- the control circuit 210 can deactivate (for example by opening them) the transistors T3 and T4 of the other cells of the plurality of cells, the second voltage is then no longer available.
- control circuit 210 controls the other cells C of the plurality of cells in order to supply the second voltage which is in the example described of 12 V. In this example, there is then a phase shift of T / 3 between the three different cells providing the second voltage.
- phase shift of T / x between the commands of the different cells, where x is the number of active cells to supply the second voltage.
- the phase shift may for example be T / 4 or T / 3, depending on the open or closed state of the isolation transistor K3-R.
- T is the period of the control cycle.
- the converter 200 comprises a capacitor C1 connected to the output of the cells C of the converter.
- the capacitor C1 is connected to the output of the other cells of the converter.
- this isolation transistor K3-R is closed, then said cell serves the converter to provide the second voltage, and the capacitor C1 is connected to the output of all the cells of the converter.
- the converter further comprises safety transistors TS between the isolation transistors TR and the output of the second voltage.
- the converter comprises a safety transistor TS per cell of the converter. There are four safety transistors TS arranged in parallel, each connected to the output of the C-cells.
- the converter further comprises an additional isolation transistor K4-R disposed directly upstream of the output of the third voltage.
- the converter finally comprises an additional safety transistor Kl-S directly upstream of the additional isolation transistor K4-R and directly at the output of the decoupled cell.
- the isolation transistors TR, the safety transistors TS, the additional isolation transistor K4-R and the additional safety transistor K1-S are used as an electronic switch that can be open (switch off) or closed (switch on).
- Transistors K1-S and K4-R are connected in series. These safety transistors Kl-S and K4-R allow when closed to deliver the third output voltage, and when open to protect the decoupled cell.
- the converter also comprises a capacitor C3 connected to the input of the additional isolation transistor K4-R.
- the capacitor C3 is connected between the additional safety transistor K1-S mentioned above and the additional isolation transistor K4-R.
- the converter also comprises an additional transistor arm, this arm being formed by the additional safety transistor Kl-S positioned upstream of the additional isolation transistor K4-R and by a transistor additional K2.
- the midpoint of this additional transistor arm is also connected to the output of the cell that can be disconnected by means of the transistor K3-R.
- the inductance L2 of the decoupled cell and the additional transistor arm make it possible to produce a so-called "boost" voltage booster circuit.
- the third voltage is of a lower level (for example 12V or
- the control circuit 210 controls the transistors K3 and K5 so that the disconnected cell performs a voltage-reducing circuit function. Simultaneously, the control circuit 210 opens the additional transistor K2 and closes the additional safety transistor K1-S.
- control circuit 210 controls the switches K3, K5, K2 and K1-S so as to realize a buck-boost circuit providing the third voltage from the first voltage.
- the additional isolation transistor K4-R is disposed between the output of said voltage booster circuit and the output of the third voltage. In case of failure of an electronic component of the converter, there may be a disconnection of the load.
- the converter additionally provides a precharging function. This is carried out by means of an additional precharge transistor K7, which makes it possible to integrate both a precharging function and a charger function within the same DC / DC converter.
- the control circuit 210 is configured to allow, when the isolation transistor K3-R and the additional isolation transistor K4-R are simultaneously open while the precharge transistor K7 is closed, to use the arm of the cell disconnected as a simple current conductor (ie transistor K5 is closed and transistor K6 is open) to supply a precharge current to one or more capacities of the network supplying the first voltage, or even to the capacitors of the converter, in particular capacitance C2.
- control circuit 210 is configured to allow, when the isolation transistor K3-R and the precharge transistor K7 are simultaneously open while the additional isolation transistor K4-R is closed to use the arm of the disconnected cell as a voltage converter circuit for producing a load circuit delivering the third voltage.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Dc-Dc Converters (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1758387A FR3071109A1 (en) | 2017-09-11 | 2017-09-11 | ON-BOARD VOLTAGE CONVERTER ON A MOTOR VEHICLE AND ASSOCIATED ELECTRIC CHARGER |
PCT/FR2018/052214 WO2019048806A1 (en) | 2017-09-11 | 2018-09-11 | Voltage converter on board a motor vehicle and associated electric charger |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3682536A1 true EP3682536A1 (en) | 2020-07-22 |
Family
ID=61027826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18782780.3A Pending EP3682536A1 (en) | 2017-09-11 | 2018-09-11 | Voltage converter on board a motor vehicle and associated electric charger |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3682536A1 (en) |
JP (2) | JP2020533935A (en) |
CN (1) | CN111316550A (en) |
FR (1) | FR3071109A1 (en) |
WO (1) | WO2019048806A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112165255A (en) * | 2020-09-27 | 2021-01-01 | 合肥巨一动力系统有限公司 | Control method suitable for interleaved parallel Boost circuit |
FR3125183A1 (en) * | 2021-07-06 | 2023-01-13 | Valeo Systemes De Controle Moteur | DC/DC VOLTAGE CONVERTER FOR PREHEATING A CATALYTIC CONVERTER AND MOTOR VEHICLE COMPRISING SUCH A DC/DC VOLTAGE CONVERTER |
JP7419318B2 (en) | 2021-09-29 | 2024-01-22 | 矢崎総業株式会社 | Power system, DCDC converter |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7256516B2 (en) * | 2000-06-14 | 2007-08-14 | Aerovironment Inc. | Battery charging system and method |
WO2003063327A2 (en) * | 2002-01-22 | 2003-07-31 | Johnson Controls Automotive Electronics | Multicellular dc/dc voltage converter with protection switches |
WO2006038175A2 (en) * | 2004-10-08 | 2006-04-13 | Koninklijke Philips Electronics N.V. | Voltage converter for converting a voltage to multiple output voltages and method of operating said voltage converter |
FR2909495B1 (en) * | 2006-12-05 | 2009-01-16 | Thales Sa | DC DC VOLTAGE ELEVATOR CONVERTER |
DE102009052769B4 (en) * | 2009-11-11 | 2022-12-15 | Bayerische Motoren Werke Aktiengesellschaft | Multi-voltage electrical system for a motor vehicle |
US9340114B2 (en) * | 2012-01-23 | 2016-05-17 | Ford Global Technologies, Llc | Electric vehicle with transient current management for DC-DC converter |
DE102012218914A1 (en) * | 2012-10-17 | 2014-04-17 | Robert Bosch Gmbh | Protective circuit arrangement for a multi-voltage network |
GB2508222A (en) * | 2012-11-26 | 2014-05-28 | Bombardier Transp Gmbh | Inductive power receiver having drain and source elements |
JP6044444B2 (en) * | 2013-04-30 | 2016-12-14 | 株式会社オートネットワーク技術研究所 | Conversion device |
JP2015056934A (en) * | 2013-09-11 | 2015-03-23 | 株式会社デンソー | Power supply device and battery unit |
US9231493B1 (en) * | 2014-08-11 | 2016-01-05 | Infineon Technologies Austria Ag | Rectifier with auxiliary voltage output |
JP2016140118A (en) * | 2015-01-26 | 2016-08-04 | 株式会社村田製作所 | Power supply |
US9954353B2 (en) * | 2015-11-05 | 2018-04-24 | GM Global Technology Operations LLC | Self turn-on and turn-off pre-charge circuit to limit bulk capacitor inrush current |
US10076964B2 (en) * | 2015-12-15 | 2018-09-18 | Faraday & Future Inc. | Pre-charge system and method |
CN106452151A (en) * | 2016-12-02 | 2017-02-22 | 中车青岛四方车辆研究所有限公司 | Single-phase inverter for motor train unit |
-
2017
- 2017-09-11 FR FR1758387A patent/FR3071109A1/en active Pending
-
2018
- 2018-09-11 JP JP2020514583A patent/JP2020533935A/en active Pending
- 2018-09-11 CN CN201880072079.5A patent/CN111316550A/en active Pending
- 2018-09-11 EP EP18782780.3A patent/EP3682536A1/en active Pending
- 2018-09-11 WO PCT/FR2018/052214 patent/WO2019048806A1/en unknown
-
2022
- 2022-05-18 JP JP2022081899A patent/JP2022110111A/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
JP2022110111A (en) | 2022-07-28 |
JP2020533935A (en) | 2020-11-19 |
WO2019048806A1 (en) | 2019-03-14 |
CN111316550A (en) | 2020-06-19 |
FR3071109A1 (en) | 2019-03-15 |
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