WO2021209640A1 - Système d'alimentation d'un moteur électrique - Google Patents

Système d'alimentation d'un moteur électrique Download PDF

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Publication number
WO2021209640A1
WO2021209640A1 PCT/EP2021/060051 EP2021060051W WO2021209640A1 WO 2021209640 A1 WO2021209640 A1 WO 2021209640A1 EP 2021060051 W EP2021060051 W EP 2021060051W WO 2021209640 A1 WO2021209640 A1 WO 2021209640A1
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WO
WIPO (PCT)
Prior art keywords
voltage
modules
electrical motor
voltage modules
active
Prior art date
Application number
PCT/EP2021/060051
Other languages
English (en)
Inventor
Jan Johansson
Original Assignee
Blixt Tech Ab
Priority date (The priority date 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 date listed.)
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Publication date
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Publication of WO2021209640A1 publication Critical patent/WO2021209640A1/fr

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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
    • H02J1/106—Parallel operation of dc sources for load balancing, symmetrisation, or sharing
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a system for feeding an electrical load. Especially to a voltage system for feeding an electrical motor.
  • a voltage system may be configured to feed an electrical load or drive an electrical motor by electrical power.
  • the latter e.g. being part of an electrical vehicle or a hybrid vehicle.
  • the voltage system may also be configured to receive power, i.e. to be loaded by an external power source, such as a wind power plant or a solar power plant.
  • an external power source such as a wind power plant or a solar power plant.
  • examples of voltage systems are systems for driving an electrical motor of electrical vehicles or hybrid vehicles.
  • Other non-limiting examples are systems coupled to wind power plants and solar power plants.
  • An objective of embodiments of the invention is to provide a solution which mitigates or solves the drawbacks and problems of conventional solutions.
  • a system for feeding an electrical motor comprises a first set of voltage modules and at least one second set of voltage modules connected to a motor, wherein each set of voltage modules of the system is active when at least one of its voltage modules is in active mode so that an output voltage of the active set of voltage modules is larger than zero, and non-active when all of its voltage modules are in non-active mode so that an output voltage of the non-active set of voltage modules is equal to zero; and configured to when driving the electrical motor in a first direction: i) during a first time period T1 , the first set of voltage modules is active and configured to feed the electrical motor when the second set of voltage modules is non-active and configured to not feed the electrical motor; ii) during a second time period T2 following the first time period T1 , the first set of voltage modules is active and the second set of voltage modules is active so that both the first set of voltage modules and the second set of voltage modules are configured to feed the electrical motor during an overlap
  • the system may also be denoted as a power system or a voltage system.
  • states i) to iii) can be repeated.
  • repeated with a periodicity In such case the system goes from state iii) to i) e.g. due to one or more conditions that are fulfilled.
  • An advantage of the system according to the first aspect is that due to the feeding overlap time period when both the first and second sets of voltage modules drives the electrical motor the efficiency of the system is improved due to reduced power losses, such as switching losses and deadtime losses. This is e.g. due to improved voltage matching. Further, with the present solution no energy buffering, such as LC networks, is needed as in conventional solutions.
  • the set of voltage modules are modular service on the set of voltage modules can be simplified. Further, the safety aspect is much improved since the voltage levels to be handled during service is only that of each module instead of a dangerously high voltage level of multiple connected batteries as in conventional solutions.
  • the system is configured to switch from i) to ii) when an output voltage of the first set of voltage modules is smaller than a first threshold voltage VTM.
  • the first threshold voltage V Thi is dependent a nominal voltage V n of the electrical motor.
  • An advantage of this implementation form is that the output voltage and hence the power provided to the electrical motor is adapted to the nominal voltage of the electrical motor.
  • the first threshold voltage V Thi is lower than the nominal voltage V n of the electrical motor.
  • the first threshold voltage V Thi is larger than 90 % of the nominal voltage V n of the electrical motor.
  • An advantage of this implementation form is that the output voltage and hence the power provided to the electrical motor is upheld to a reasonable level so that the electrical motor can operate or function properly.
  • the system is configured to switch from i) to ii) when the output voltage of the second set of voltage modules is larger than a second threshold voltage V Th 2.
  • the second threshold voltage V Th 2 is higher or equal to a nominal voltage V n of the electrical motor.
  • the second threshold voltage V Th 2 is dependent on at least one of the first threshold voltage VTM and the nominal voltage V n of the electrical motor.
  • An advantage of this implementation form is that the output voltage of the second set of voltage modules may be determined more accurate for better performance or functioning of the electrical motor.
  • the second threshold voltage V Th 2 is dependent on a difference voltage between the first threshold voltage VTM and the nominal voltage V n of the electrical motor.
  • the nominal voltage V n of the electrical motor is dependent on a requested torque or power of the electrical motor.
  • the system being configured to when a voltage of the electrical motor is higher than the output voltage of the first set of voltage modules and/or the output voltage of the second set of voltage modules: during a first time period T1 , the first set of voltage modules is active and configured to load its voltage modules from the electrical motor; during a second time period T2 following the first time period T1 , the first set of voltage modules is active and the second set of voltage modules is active so that both the first set of voltage modules and the second set of voltage modules are configured to load its voltage modules from the electrical motor; and during a third time period T3 following the second time period, the second set of voltage modules is active and configured to load its voltage modules from the electrical motor.
  • system further comprises an overlap transfer circuit comprising at least one first controllable switch coupled between the first set of voltage modules and the electrical motor and configured to couple or uncouple the first set of voltage modules to the electrical motor; and at least one second controllable switch coupled between the second set of voltage modules and the electrical motor and configured to couple or uncouple the second set of voltage modules to the electrical motor.
  • the first controllable switch is configured to receive first control signals and the second controllable switch is configured to receive second control signals, so that both the first controllable switch and the second controllable switch both are conductive during the overlap time period, wherein the first control signals and the second control signals are simultaneous or non-simultaneous clocked.
  • first control signals and the second control signals are non-simultaneous clocked with a time offset dependent on at least one of: a current provided to the electrical motor, and a difference in output voltage between the first and second sets of voltage modules.
  • the duration of the second time period T2 is dependent on a switching time of the first output switch and/or a switching time of the second output switch.
  • An advantage of this implementation form is that the switching losses can be held as low as possible.
  • the duration of the second time period T2 is less than 10 % of the duration of the first time period T 1 and/or the duration of the third time period T3.
  • a system comprising a third set of voltage modules and at least one fourth set of voltage modules connected to the electrical motor; and configured to when driving the electrical motor in a second direction revers to the first direction: iv) during a fourth time period T4, the third set of voltage modules is active and configured to drive the electrical motor when the fourth set of voltage modules is non-active and configured to not drive the electrical motor; v) during a fifth time period T5 following the fourth time period T4, the third set of voltage modules is active and the fourth set of voltage modules is active so that both the third set of voltage modules and the fourth set of voltage modules are configured to drive the electrical motor; and vi) during a sixth time period T6 following the fifth time period T5, the third set of voltage modules is non-active and configured to not drive the electrical motor when the fourth set of voltage modules is active and configured to drive the electrical motor.
  • the system comprises at least one equalizing switch coupled between a positive lines (L1 ) of the sets of voltage modules, and wherein a difference in output voltage between the voltage modules is equalized when the equalizing switch is set in conductive mode.
  • An advantage of this implementation form is that all non-active set of voltage modules can share their voltages, current and power so as to equalize the non-active set of voltage modules of the system.
  • an output voltage of a set of voltage modules is dependent on the number of active voltage modules in the set of voltage modules.
  • each set of voltage modules comprises at least one voltage module having a nominal voltage and at least one voltage module having a variable voltage.
  • An advantage of this implementation form is that the output voltage may be adapted with higher granularity for more precis and improved voltage matching.
  • system is further configured to connect non-active sets of voltage modules to an external voltage source so as to load the voltage modules of the non-active sets of voltage modules.
  • An advantage of this implementation form is that the non-active sets of voltage modules can be reloaded or re-powered by the external voltage or power source.
  • system further comprises a control arrangement configured to control each set of voltage modules, each voltage module and each switch of the system.
  • the control arrangement/device may be a standalone control arrangement or part of another control arrangement. In the latter case the control arrangement may be part of or integrated with a control arrangement configured to control the electrical motor.
  • the present control arrangement may be part of a machine or a vehicle in which the electrical motor is a part of.
  • the switching frequency of the control arrangement is higher than or equal to 10 kHz.
  • the switching frequency of the control arrangement is lower than or equal to 300 kHz.
  • An advantage of this implementation form is that the switching losses can be held low.
  • FIG. 1 shows a system according to embodiments of the invention
  • FIG. 2a and 2b shows a one switch implementation and a two switch according to embodiments of the invention
  • FIG. 3a and 3b illustrates driving in the first direction according to embodiments of the invention
  • FIG. 4a and 4b illustrates driving in the first direction and the second direction according to embodiments of the invention
  • - Fig. 5 shows a state diagram when driving in the first direction according to embodiments of the invention
  • FIG. 6 shows a state diagram when the system is recharged by the electrical motor according to embodiments of the invention
  • FIG. 7 shows a system according to an embodiment of the invention
  • Fig. 8 illustrates a set of voltage modules of a system according to an embodiment of the invention
  • FIG. 9 illustrates a voltage module having a switching arrangement according to an embodiment of the invention
  • FIG. 10 illustrates two different voltage modules each having a three switch switching arrangement according to an embodiment of the invention
  • FIG. 11 shows a first set of voltage modules according to an embodiment of the invention
  • Fig. 12 shows a first set of voltage modules coupled to a second set of voltage modules according to an embodiment of the invention
  • Fig. 13 shows a plurality of sets of voltage modules coupled to each other according to an embodiment of the invention
  • - Fig. 14 shows a plurality of sets of voltage modules coupled to each other according to an embodiment of the invention
  • - Fig. 15 illustrates a system comprising two ports which may be coupled to a power consumer or a power source;
  • FIG. 20 shows an embodiment of the invention including a control device
  • Figs. 21 - 23 illustrate different aspects of controlling the controllable switches of the overlap circuit.
  • Fig. 1 shows a system for feeding an electrical motor according to an embodiment of the invention.
  • the system 100 comprises a first set of voltage modules 112 and at least one second set of voltage modules 122 connected to an electrical motor 200.
  • Each set of voltage modules of the system 100 is active when at least one of its voltage modules is in active mode so that an output voltage of the active set of voltage modules is larger than zero. Further, each set of voltage modules of the system 100 is non-active when all of its voltage modules are in non-active mode so that an output voltage of the non-active set of voltage modules is equal to zero.
  • the following states are executed/performed when driving the electrical motor 200 in a first direction D1 : i) during a first time period T1 , the first set of voltage modules 112 is active and configured to feed the electrical motor 200 when the second set of voltage modules 122 is non-active and configured to not feed the electrical motor 200; ii) during a second time period T2 following the first time period T1 , the first set of voltage modules 112 is active and the second set of voltage modules 122 is active so that both the first set of voltage modules 112 and the second set of voltage modules 122 are configured to feed the electrical motor 200; and iii) during a third time period T3 following the second time period T2, the first set of voltage modules 112 is non-active and configured to not feed the electrical motor 200 when the second set of voltage modules 122 is active and configured to feed the electrical motor 200.
  • states or steps i) to iii) can be repeated an arbitrary number of times, e.g. with a periodicity.
  • the system 100 when being in state iii) the system 100 is further configured to return back to state i), continue to state ii) and thereafter to state iii), and so on.
  • Such cyclic repetitions may be controlled by a control arrangement 102 of the system 100 which is configured to control each set of voltage modules, each voltage module and each switch of the system 100.
  • the control arrangement 102 will be explained more in detail in the following disclosure.
  • different conditions may be set or used for switching from state i) to ii).
  • the conditions may relate to the output voltage of the first set of voltage modules 112 and its associated threshold parameters and/or the output voltage of the second set of voltage modules 122 and its associated threshold parameters.
  • the switching between the states may in embodiments be controlled by the control arrangement and be performed by means of an overlap circuit which is described further in the following disclosure.
  • the system 100 may be configured to switch from state i) to ii) when an output voltage of the first set of voltage modules 112 (also denoted a first output voltage herein) is smaller than a first threshold voltage VTM which implies that the first output voltage may be continuously checked against the first threshold and if it is found that this condition is fulfilled the system 100 switches from state i) to ii), i.e. to the second time period T2 when the first and second sets of voltage modules feed the electrical motor 200 at the same time.
  • VTM first threshold voltage
  • the first threshold voltage VTM may be dependent a nominal voltage V n of the electrical motor 200.
  • a nominal voltage of the electrical motor 200 can be understood as an expected voltage of the electrical motor 200, an operating voltage of the load, a working voltage of the electrical motor 200, etc.
  • Different types of nominal voltages may be considered. One type is static or more or less constant, meaning a constant nominal voltage value, e.g. for a load demanding a constant power. Another type is when the nominal voltage value takes discrete values which e.g. may be predefined, e.g. different power levels of a microwave oven. Yet another type is when the nominal voltage value can take continuous values, e.g. an electrical motor of a vehicle such as a car or a truck. For the latter case, e.g.
  • the nominal voltage V n of the electrical motor 200 is dependent on a requested torque or power of the electrical motor 200. This information may be obtained from suitable sensors and/or external communication devices providing such information.
  • the first threshold voltage VTM is lower than the nominal voltage V n of the electrical motor 200 which means that the electrical motor 200 has drained the power of the first set of voltage modules to some extent.
  • the first output voltage should not drop to much and therefore in further embodiments of the invention the first threshold voltage VTM is larger than 90 % of the nominal voltage V n of the electrical motor 200.
  • the percentage of the nominal voltage is dependent on the application or type of the electrical motor 200 and hence in embodiments of the invention, the first threshold voltage VTM is larger than X % of the nominal voltage V n of the electrical motor 200, where X % is dependent on or based on the proper functioning of the electrical motor 200. In other words, the lower limit for the electrical motor 200 to work or operate properly.
  • the system 100 is configured to switch from state i) to ii) when the second output voltage is larger than a second threshold voltage V Th 2. This also implies that the system 100 may continuously check the value of the second output voltage and compare it to a second threshold voltage V Th 2.
  • the second threshold voltage V Th 2 may be higher or equal to a nominal voltage V n of the electrical motor 200. It has further been realised that the second threshold voltage V Th 2 may be dependent on at least one of the first threshold voltage VTM and the nominal voltage V n of the electrical motor 200. For example, the second threshold voltage V Th 2 may be higher than the first threshold voltage VTM and the nominal voltage V n .
  • the second threshold voltage V Th 2 is determined based on such a difference voltage.
  • the second threshold voltage V Th 2 may be set as the nominal voltage plus the difference voltage.
  • the voltage modules of the system 100 are in embodiments of the invention coupled to the electrical motor 200 via an overlap transfer circuit 300 comprising controllable switches 130a, 130b,..., 130n. Therefore, at least one first controllable switch 130a is coupled between the first set of voltage modules 112 and the electrical motor 200 and configured to couple or uncouple the first set of voltage modules 112 to the load 200. Further, at least one second controllable switch 130b is coupled between the second set of voltage modules 122 and the electrical motor 200 and configured to couple or uncouple the second set of voltage modules 122 to the electrical motor 200.
  • Fig. 2a and 2b show two different cases.
  • each set of voltage modules are coupled to the electrical motor 200 via one controllable switch 130a and 130b while in Fig. 2b each set of voltage modules are coupled to the electrical motor 200 via two separate controllable switches, i.e. 130a, 130a ' and 130b, 130b ' .
  • the two controllable switches are opposite coupled to each other in a current direction as shown in Fig. 2b.
  • the switches are in this case field effect transistors (FETs) but can be any suitable type of switches. It is to be noted that when a transistor is in ON mode it is fully conductive in both directions and when in OFF mode the transistor is only conductive in the direction of the body diode which is also shown.
  • FETs field effect transistors
  • exemplary output voltages of the first 112 and second 122 sets of voltage modules are also shown.
  • Fig. 2b the same case as in Fig. 2a is illustrated but with the difference that each set of voltage modules are coupled to the electrical motor 200 via two separate switches as aforementioned.
  • Fig. 3a and 3b illustrates when the system 100 drive an electrical motor in a first direction D1 such as a forward direction.
  • the bold lines and arrows illustrate the flow of the current in the system 100.
  • the second set of voltage modules 122 on the other hand is non-active (0V) and its switches 130b, 130b ' are in OFF mode.
  • the current from 112 flows through the electrical motor 200 and to third 132 and fourth 142 sets of voltage modules which are non-active but with their switches 130c, 130c ' , 130d, 130d ' are in ON mode.
  • the first set of voltage modules 112 on the other hand is non-active (OV) and its switches are in OFF mode.
  • Fig. 4a and 4b illustrates when the system 100 drives an electrical motor 200 in a first direction D1 , such as a forward direction, and in a second direction D2 opposite to the first direction D1 such as a reverse direction. Therefore, in embodiments of the invention, the system 100 comprises a third set of voltage modules 132 and at least one fourth set of voltage modules 142 connected to the electrical motor 200; and configured to when driving the electrical motor 200 in a second direction D2 reverse to the first direction D1.
  • the system 100 executes or performs: iv) during a fourth time period T4, the third set of voltage modules 132 is active and configured to drive the electrical motor 200 when the fourth set of voltage modules 142 is non active and configured to not drive the electrical motor 200; v) during a fifth time period T5 following the fourth time period T4, the third set of voltage modules 132 is active and the fourth set of voltage modules 142 is active so that both the third set of voltage modules 132 and the fourth set of voltage modules 142 are configured to drive the electrical motor 200; and vi) during a sixth time period T6 following the fifth time period T5, the third set of voltage modules 132 is non-active and configured to not drive the electrical motor 200 when the fourth set of voltage modules 142 is active and configured to drive the electrical motor 200.
  • the output voltage of the third set of voltage modules 132 is also denoted third output voltage herein and the output voltage of the fourth set of voltage modules 142 is also denoted fourth output voltage herein.
  • Fig. 4a the same case as in Fig. 3a is illustrated that is when the electrical motor 200 is operating in the first direction D1 .
  • Fig. 4b the electrical motor 200 is operating in the second direction D2. Therefore, any of the third set of voltage modules 132 and/or the fourth set of voltage modules 142 can drive 200 in the second reverse direction D2.
  • Fig. 5 shows a state diagram when driving the electrical motor 100 in the first direction D1 according to embodiments of the invention.
  • the first set of voltage modules 112 is still active but the first output voltage has been reduced to 190 V due to driving the electrical motor 200.
  • the first set of voltage modules 112 is still driving the electrical motor 200 with 190 V but the second set of voltage modules 122 is activated.
  • the second output voltage is set to 210 V which 10 V higher than the nominal voltage 200 V.
  • the second set of voltage modules 122 is also driving the electrical motor 200 since its switch 130b ' has been set in ON mode.
  • the first set of voltage modules 112 is still driving the electrical motor 200 but its switch 130a ' has been set in OFF mode so as to avoid a current rush from the second set of voltage modules 122.
  • first output voltage has raised to 197 V as the both the second set of voltage modules 112 and the second set of voltage modules 122 both drives the electrical motor 200.
  • this is a driving overlapping time period when the first set of voltage modules 112 and the second set of voltage modules 122 drive the electrical motor 200 at the same time.
  • the second set of voltage modules 122 drives the electrical motor 200 alone with 200 V.
  • the second set of voltage modules 122 continues to drive the electrical motor 200 alone.
  • the first set of voltage modules 112 in non-active state can be coupled to other non-active sets of voltage modules for voltage/power sharing.
  • Fig. 6 shows a state diagram when the system 100 is recharged by the electrical motor 200 according to embodiments of the invention. This can e.g. happen when a vehicle comprising the electrical motor 200 is running down a descending road section, i.e. having a negative slope. Another exemplary case is when a vehicle is braking for reducing its speed. In such examples energy is transferred from the motor 200 to the system 100.
  • the system 100 is configured to when a voltage of the electrical motor 200 is higher than the output voltage of the first set of voltage modules 112 and/or the output voltage of the second set of voltage modules 122; to perform during a first time period T1 , the first set of voltage modules 112 is active and configured to load its voltage modules from the electrical motor 200; during a second time period T2 following the first time period T1 , the first set of voltage modules 112 is active and the second set of voltage modules 122 is active so that both the first set of voltage modules 112 and the second set of voltage modules 122 are configured to load its voltage modules from the electrical motor 200; and during a third time period T3 following the second time period T2, the second set of voltage modules 122 is active and configured to load its voltage modules from the electrical motor 200.
  • the voltage of the electrical motor 200 is higher than the first output voltage which means that the current will flow from the electrical motor 200 to the first set of voltage modules 112 and the first output voltage raises to 205 V.
  • switch 130b ' is set to ON mode which means that the current from the electrical motor 200 also flows to the second set of voltage modules 122 and the second output voltage raises to 200 V. Since the first output voltage has raised and is higher than the second output voltage it is time to load second set of voltage modules 122.
  • the second set of voltage modules 122 is active and continue to be loaded by the electrical motor 200.
  • the overvoltage Vo may also be denoted a generator voltage of the electrical motor 200 and is larger than the output voltage of the system.
  • An overvoltage V 0 may arise when the electrical motor receives energy e.g. when a vehicle is driving in a descent or when mechanically breaking.
  • the breaking of the electrical motor 200 can be controlled.
  • the first parameter P1 is the difference in voltage between an initial output voltage and a final output voltage of the system 100 for a breaking operation or procedure.
  • the second parameter P1 is the how fast the initial output voltage is changed to the final output voltage, e.g. given as a changing rate from the initial output voltage to the final output voltage.
  • the larger value of P1 the larger breaking of the electrical motor 200 and the faster P2 the larger breaking of the electrical motor 200.
  • more than two different sets of voltage modules can feed the electrical motor 200 in a driving direction by using a feeding pattern. It is important to stress that the feeding overlapping time periods herein disclosed should be employed in which at least two different sets of voltage modules drive the electrical motor 200 at the same time. For example, consider three sets of voltage modules (or blocks or chains of voltage modules) for simplicity denoted B1 , B2, and B3 driving the electrical motor 200 in a direction.
  • the following feeding pattern may be employed:
  • B1 drives the electrical motor; B2 is non-active; B3 is non-active.
  • B1 is non-active; B2 drives the electrical motor; B3 is non-active.
  • step 1 to 3 is repeated e.g. according to a control pattern or configuration of the control arrangement 102.
  • non-active sets of voltage modules may be electrically coupled with each other so as to equalize the voltages and currents of the non-active sets of voltage modules.
  • dedicated switches for such purpose may be employed
  • the system may comprise at least one equalizing switch 410 coupled between a positive line L1 of the first set of voltage modules 112 and a positive line LT of the second set of voltage modules 122, and wherein a difference in output voltage between the first set of voltage modules 112 and the second set of voltage modules 122 is equalized when the equalizing switch 410 is set in conductive mode.
  • step 1 - B2 and B3 can be coupled to each other and share power; at step 2 - B1 and B3 can be coupled to each other and share power; and at step 3 - B1 and B2 can be coupled to each other and share power.
  • the non-active sets of voltage modules of the system 100 may further be connected to an external power source so as to charge the voltage modules of the non-active sets of voltage modules.
  • the system 100 may have measuring resistances R coupled in parallel to the two switches 130. This is naturally also possible in the one switch case as shown in Fig. 2a however with only one measuring resistance R.
  • the measurements made over the resistances R can be used by the control arrangement 102 for controlling the output voltage of the system 100.
  • the output voltage can therefore be adapted or matched to the nominal voltage of the electrical motor 200.
  • the output voltage can also be adapted to a nominal voltage of a power source if the system 100 is coupled to such a source for power loading.
  • the characteristics of the switches may have an influence on the second time period T2. Therefore, in embodiments, the duration of the second time period T2 is dependent on a switching time of the first controllable switch 130a and/or a switching time of the second controllable switch 130b due to the fact that the second time period T2 may be held as short as possible due to losses in the body diode but at the same time minimizing the risk of having the switches in ON mode and be fully conductive since that could lead to current rush between the different sets of voltage modules. Due to such characteristics the second time period is often much shorter than the first time period T1 and the third time period T3.
  • the duration of the second time period T2 may be less than 10 % of the duration of the first time period T1 and/or the duration of the third time period T3.
  • the second time period T2 may be less than 1 % of the duration of the first time period T 1 and/or the duration of the third time period T3.
  • further adaptiveness of the system 100 relates to scalability of the output voltage of the sets of voltage modules.
  • an output voltage of a set of voltage modules is dependent on the number of active voltage modules in the set of voltage modules and the type of voltage modules.
  • Fig. 7 shows a system 100 according to an embodiment of the invention.
  • the system 100 comprises a first set of voltage modules 112a, 112b,..., 112n and a control arrangement 102 configured to control each voltage module 112n.
  • the control arrangement 102 can e.g. control each voltage module 112n via switches or any other suitable components.
  • the control arrangement 102 can control the voltage modules via control signalling illustrated with the dashed arrows from the control arrangement 102 to the voltage modules 112a, 112b,..., 112n.
  • Suitable control protocols may be used in this respect and be performed over known wired communication means, such as CAN busses or other communication busses.
  • wireless communication means can be used by the control arrangement 102 for controlling the components of the system 100.
  • the control arrangement 102 may e.g. comprise one or more processors and one or more memory units and may be connected to one or more sensors and devices from which the control arrangement may receive input that may be used for controlling the voltage modules and other components of the system 100. More details of such aspects are described in the following disclosure.
  • the control arrangement 102 may operate using a switching or a clock frequency when controlling the different components of the system 100.
  • the switching frequency of the control arrangement may be higher than or equal to 10 kFIz and lower than or equal to 300 kFIz. If the frequency is lower than 10 kFIz it will be difficult to provide good alternating current (AC) waveforms such as a sinusoid curve. On the other hand, if the frequency is higher than 300 kFIz the efficiency of the system will be reduced due to switching losses in the system.
  • AC alternating current
  • the system 100 may further comprise a first port P1 including a first side S1 pi configured to be connected to an external power consumer 210, such as a load or electrical motor, or an external power source 220 and a second side S2 Pi configured to be connected to the first set of voltage modules 112a, 112b,..., 112n.
  • the first port P1 thus allows voltage and hence power to be supplied to and from the system 100.
  • voltage or power may be supplied from one or more of the first set of voltage modules 112a, 112b,..., 112n to the external power consumer 210 or voltage may be supplied from the external power source 220 to one or more of the first set of voltage modules 112a, 112b,..., 112n.
  • each voltage module 112n in the first set of voltage modules 112a, 112b,..., 112n comprises an voltage depot 114n including a first connection 116n coupled to a first common line L1 of the first set of voltage modules 112a, 112b,..., 112n and a second connection 118n coupled to a second common line L2 of the first set of voltage modules 112a, 112b,..., 112n.
  • the second common line L2 may be coupled to the second side S2P I of the first port P1 , as shown in Fig. 8.
  • each voltage depot 114n includes at least one of a battery B and a capacitor C, see Fig. 9.
  • the battery B and the capacitor C may be coupled in parallel to each other between the first common line L1 and the second common line L2.
  • the batteries herein may be any suitable batteries known in the art and with any voltage rating. Non-limiting examples are Lithium battery rated is 3.6V and 3 - 4 Ah. With 6 such batteries in series, the rated voltage of a voltage module would become 21 .6 V. The voltage range per module goes from discharged to fully charged 18V-25V. Other non-limiting examples are LiFe, Lilon and LiFe batteries.
  • the capacitors herein may be any suitable capacitors known in the art.
  • ceramic capacitors are selected for the modules' maximum voltage. These have relatively low Ri, which means low heating and heat loss during loading and unloading.
  • Capacitors with different value, voltage resistance and chemistry may be included in a parallel circuit to minimize resistance.
  • each voltage depot may include a transformer T, see Fig. 9.
  • the transformer may have 1 :1 relation between its primary and secondary windings. Therefore, each voltage depot may include any combinations of batteries B, capacitors C and transformers T.
  • the transformers herein may be any suitable transformer known in the art. For example, with ⁇ 10A current and 25V rated voltage per module, the power requirement may be at least 250VA.
  • a non-limiting example is CoilCrafts PL300-100 with 1 :1 coupling which is designed for 300W at 200kFlz.
  • the 1 :1 ratio implying unregulated voltage transmission, means that rings, etc. undesirably can be reduced to a minimum.
  • each voltage depot has a nominal (fixed) voltage or a variable or tuneable voltage.
  • each voltage depot can have 25 V so that for each activate voltage module the set of voltage module will have a common/output voltage that is equal to the number of activated modules times 25 V.
  • each set of voltage modules may have one or more voltage modules that can provide voltages with higher granularity, e.g. from 1 .2 V up to 21 .6 V in steps of 1 .2 V, i.e. 18 units.
  • the voltage depots can e.g. be built with one or more batteries coupled in the voltage depot. It is noted that the actual voltage of a battery depends on if the battery is charged or discharged.
  • each set of voltage modules comprises at least one voltage depot having a nominal voltage and at least one voltage depot having a variable voltage.
  • the common voltage of each set of voltage modules can be adjusted, e.g. to the nominal voltage of the external power consumer or the external power source.
  • different waveforms can be generated such as sinusoidal AC waveforms.
  • each set of voltage modules has at least one voltage depot having a nominal voltage and a single voltage depot having a variable voltage. By having only one voltage depot having a variable voltage also the cost can be held low but still provide adaptability of the value of the common voltage for each set of voltage modules.
  • Each voltage module 112n further comprises an internal switching arrangement 120n coupled to the voltage depot 114n.
  • the control arrangement 102 is configured to control each voltage module 112n to operate in a first mode M1 in which an voltage of its voltage depot 114n is added to a common voltage of the first set of voltage modules 112a, 112b,..., 112n, or a second mode M2 in which an voltage of its voltage depot 114n is shared to one or more other voltage modules in the first set of voltage modules 112a, 112b,..., 112n.
  • the control arrangement 102 may control each voltage module 112n between the first mode M1 and the second mode M2 by controlling the switching arrangement 120n of the voltage module 112n.
  • control arrangement 102 may in embodiments be configured to control a voltage module 112n by controlling its switching arrangement 120n.
  • the control arrangement 102 may be configured to control each switching arrangement 120n to operate in a first switching mode SM1 in which the voltage depot 114n is coupled in series with one or more other voltage depots of the first set of voltage modules 112a, 112b,..., 112n so that its voltage is added to the common voltage of the first set of voltage modules 112a, 112b,..., 112n; or a second switching mode SM2 in which the voltage depot 114n is coupled in parallel with one or more other voltage depots of the first set of voltage modules 112a, 112b,..., 112n so that its voltage is shared with to one or more other voltage modules in the first set of voltage modules 112a, 112b,..., 112n.
  • Fig. 9 illustrates such embodiments of the invention.
  • the switching arrangement of the voltage module can switch the voltage module between the first mode M1 (also denoted active mode) and the second mode M2 (also denoted non-active mode), respectively.
  • the switching arrangement is in the first switching mode SM1 and therefore the voltage depot 114 will be serially coupled to a voltage depot of an adjacent voltage module (not shown) which means the voltage of this particular voltage module will be added to the common/output voltage of the set of voltage modules it belongs to. Therefore, the common voltage of a set of voltage modules will be the sum of all its voltage modules that are in its first mode M1 .
  • the voltage depot will be coupled in parallel with an voltage depot of an adjacent voltage module which means that the voltage of the voltage depot will be equalized with other voltage depots in the set of voltage modules that are in the second mode M2. Therefore, the voltage will be equalized among the voltage modules that are in the second mode M2. If all voltage modules of a set of voltage modules are coupled in parallel with each other the common or output voltage of the set will be zero.
  • each switching arrangement 120n includes three switches.
  • Fig. 10 shows such switching arrangement 120a of a first voltage module 112a according to an embodiment of the invention.
  • the switching arrangement 120a includes a first switch SW1 , a second switch SW2, and a third switch SW3 and is coupled between the first voltage module 112a and an adjacent second voltage module 112b.
  • the switching arrangement includes a first switch SW1 coupled between the first connection 116n of the voltage depot 114n and a first connection 116n of an adjacent voltage depot 114n, a second switch SW2 coupled between the second connection 118n of the voltage depot 114n and a second connection 118n of the adjacent the voltage depot 114n, and a third switch SW3 coupled between the first connection 116n of the voltage depot 114n and the second connection 118n of the adjacent the voltage depot 114n.
  • Fig. 10 only shows first 112a and second 112b voltage modules for illustration but it is realised that a set of voltage modules can comprise any number of voltage modules.
  • control arrangement 102 may be configured to control each switching arrangement 120n to operate in the first SM1 and second SM2 switching modes by controlling the first switch SW1 , the second switch SW2, and the third switch SW3, respectively.
  • first switch SW1 and the second switch SW2 are switched OFF when the third switch SW3 is switched ON; and in the second switching mode SM2, the first switch SW1 and the second switch SW2 are switched ON when the third switch SW3 is switched OFF.
  • a switch that is switched ON can be understood to fed/led current/voltage, i.e. allow current to pass through the switch, while a switch that is switched OFF can be understood to not fed/led any current/voltage, i.e. prevent current to pass through the switch.
  • the first switch SW1 is coupled between the first connection 116a of the first voltage depot 114a and the first connection 116b of the second voltage depot 114b
  • the second switch SW2 is coupled between the second connection 118a of the first voltage depot 114a and the second connection 118b of the second the voltage depot 114b
  • the third switch SW3 is coupled between the first connection 116n of the first voltage depot 114a and the second connection 118b of the second voltage depot 114b. It is further noted that the first switch SW1 and the second switch SW2 are not switched at the same time instance as the third switch SW3, or vice versa, since this would result in a short circuit.
  • the control arrangement 102 may control the first switching arrangement 120a to operate in the first SM1 and second SM2 switching modes.
  • the first switch SW1 and the second switch SW2 are switched OFF when the third switch SW3 is switched ON.
  • the first voltage depot 114a is coupled in series with the second voltage depot 114b and hence that voltage can be added to the common voltage of the first set of voltage modules 112a, 112b,..., 112n.
  • the second switching mode SM2 the first switch SW1 and the second switch SW2 are switched ON when the third switch SW3 is switched OFF.
  • the first voltage depot 114a is coupled in parallel with the second voltage depot 116b and hence that its voltage can be shared to one or more other voltage modules in the first set of voltage modules 112a, 112b,..., 112n.
  • the common voltage of a set of voltage modules may be denoted as a common voltage or an output voltage of the set of voltage modules when the voltage depots are voltage depots, such as batteries, capacitors, and transformers.
  • the control arrangement 102 may further be configured to control each voltage module 112n to operate in a third mode M3 in which a voltage of the voltage depot 114n is measured.
  • each voltage module 112n may comprise a measuring resistance R coupled in parallel to the second switch SW2 and between the second connection 118n of the voltage depot 114n and a second connection 118n of an adjacent voltage depot 114n. This is illustrated in Fig. 11 .
  • the measuring resistance R may have the same value for all voltage modules and may be used for voltage sharing between different voltage modules.
  • the measuring resistance R can e.g. be of SMD type which allows the transistors in each voltage module to be of LV type.
  • measuring resistance R is selected too large, the voltage distribution may be dependent on the leakage currents of the voltage module's other components. If measuring resistance R on the other hand is selected too little, the power consumption may be unnecessarily high.
  • the value may be higher than 1 kQ/V so that each 25V voltage module could have a value higher than 25kQ. This means a "leakage" of max 1 mA, which means loss of max 0.25W at 250V.
  • the voltage can be measured over the second switch SW2.
  • Such measurements can be used by the control arrangement 102 for determining relevant control parameters such as if the current is DC or AC, frequency of AC, amplitude, etc. Based on such control parameters the control arrangement 102 can decide when and what to couple to the external power consumer or power source. If the system 100 should be coupled to an external power consumer the output voltage of the system 100 at the port should be higher than the nominal voltage of the external power consumer so that the external power consumer will be fed with power by the system 100. On the other hand, if the system 100 should be coupled to an external power source the output voltage of the system at the port should be lower than the nominal voltage of the external power source so that the system 100 is fed by the external power source.
  • control arrangement and hence the system 100 can be configured to:
  • control parameters such as DC, AC, AC frequency and amplitude, based on the one or more measurements
  • the system 100 may comprises a controllable switch 130n coupled between the first set of voltage modules 112a, 112b,..., 112n and the second side S2 Pi of the first port P1 as shown in Fig. 11 .
  • the controllable switch 130n may be configured to be controlled by the control arrangement 102.
  • the control parameters may also be used for controlling the overlap circuit and its switches.
  • the controllable switch 130n is in ON mode the set of voltage modules are conductively coupled to the first port P1 .
  • voltage module 112a and 112c are in the second mode M2 while voltage module 112c is in the first mode in the example in Fig. 11 .
  • the common voltage or the output voltage will be the voltage of voltage module 112b in this particular example.
  • the system 100 further comprises at least one second set of voltage modules 122a, 122b, ... , 122n connected to the second side S2pi of the first port P1 .
  • Each voltage module 122n in the second set of voltage modules 122a, 122b,..., 122n comprises an voltage depot 124n including a first connection 126n coupled to a first common line LT of the second set of voltage modules 122a, 122b,..., 122n and a second connection 128n coupled to a second common line L2 ' of the second set of voltage modules 122a, 122b,..., 122n and a switching arrangement 126n coupled to the voltage depot 124n.
  • the first common line L1 ' of the second set of voltage modules 122a, 122b, ... , 122n is coupled to the first common line L1 of the first set of voltage modules 112a, 112b,..., 112n via an equalizing switch 410; and the second common line L2 ' of the second set of voltage modules 122a, 122b,..., 122n is coupled to the second common line L2 of the first set of voltage modules 112a, 112b,..., 112n via an equalizing switch 410.
  • the control arrangement 102 is configured to control each voltage module 122n in the second set of voltage modules 122a, 122b,..., 122n to operate in the first mode M1 or in the second mode M2.
  • the second set of voltage modules can comprise at least one voltage module with a nominal voltage value and at least one voltage module with variable voltage value so that the output voltage of the second set of voltage modules can be varied and adapted.
  • the system 100 may comprise a plurality of sets of voltage modules coupled to each other according to the above described principals.
  • first L1 and the second L2 common line of the first set of voltage modules are shown but it is noted the first common line of each set of voltage modules are coupled to each other and correspondingly the second common line of each set of voltage modules are coupled to each other via switches of the type shown in Fig. 12.
  • the system 100 also comprises at least one second port P2 as shown in Fig. 13, 14 and 15.
  • the second port P2 includes a first side S1 p 2 configured to be connected to an external voltage consumer 210 or to an external voltage depot 220 and a second side S2 P2 coupled to at least one of the second common line L2 of the first set of voltage modules 112a, 112b,..., 112n and the second common line L2 ' of the second set of voltage modules 122a, 122b,..., 122n.
  • the present system 100 may be coupled to a multiple ports P1 , P2,..., Pn which in turn are coupled to one or more external power consumers 210 or external power sources 220.
  • An external power consumer may e.g.
  • An external power source 220 may be configured to charge the system 100 with electrical power/energy, e.g. a wind power plant, a solar power plant, grid power system or any other suitable plant or power system. It is noted from Fig. 15 that a load 210 is coupled between P1 and P2. Further a positive voltage can be generated from port P1 to port P2 and a negative voltage from port P2 to port P1. Hence, both positive and negative voltage can be generated.
  • the overlap transfer circuit 300 comprises a first controllable switch 130a configured to be coupled between the first set of voltage modules 112 and the motor 200; and a second controllable switch 130b configured to be coupled between the second set of voltage modules 122 and the motor 200.
  • the first controllable switch 130a is configured to feed a first current i t from the first set of voltage modules 112 to the motor 200 when the second controllable switch 130b is configured to block a second current i 2 from the second set of voltage modules 122 to the motor 200; ii) during a second time period T2 following the first time period T1 , the first controllable switch 130a is configured to feed a first current i t from the first set of voltage modules 112 to the motor 200 when the second controllable switch 130b is configured to feed a second current i 2 from the second set of voltage modules 122 to the motor 200; and iii) during a third time period T3 following the second time period T2, the first controllable switch 130a is configured to block a first current from the first set of voltage modules 112 to the motor 200 when the second controllable switch 130b is configured to feed a second current i 2 from
  • the second time period T2 therefore defines a time period when both the first and second power sources delivers current to the motor 200 at the same time.
  • This time period may therefore be denoted an overlap power transfer time period or overlap time period. It is known that in conventional solutions the power transfer is not overlapping but instead separated using so called deadtimes.
  • the first controllable switch 130a is configured to feed a first current i t from the first set of voltage modules 112 to the motor 200 when the second controllable switch 130b is configured to feed a second current i 2 from the second set of voltage modules 122 to the motor 200.
  • the fourth time period T4 is also an overlap time period when both the first and second sets of voltage modules feed/supply current to the motor 200 at the same time.
  • steps i) to iv) described previously may be repeated any number of times.
  • thresholds and relations therebetween can be employed, i.e. the first threshold voltage VTM, the second threshold voltage V Th 2, nominal voltages V n , difference between voltages, etc.
  • the first controllable switch 130a is configured to receive first control signals CTRL1 and the second controllable switch 130b is configured to receive second control signals CTRL2, so that both the first controllable switch 130a and the second controllable switch 130b both are conductive during an overlap time period, wherein the first control signals CTRL1 and the second control signals CTRL2 are simultaneous or non- simultaneous clocked.
  • the control signals may be provided by the previously describe control arrangement 102.
  • a time offset between the first and second control signals may depend on at least one of: a current provided to a power consumer, currents provide by a power source to the first and second sets of voltage modules, and a difference in output voltage between the first and second sets of voltage modules.
  • the offset may also be dependent on the mentioned control parameters obtained by using the measurement modes of the voltage modules.
  • first control signals CTRL1 and the second control signals CTRL2 may comprise ON signals and OFF signals, e.g. ones and zeros (1/0).
  • An ON signal sets a controllable switch, such as the first controllable switch 130a and second controllable switch 130b, in a conductive mode and an OFF signal sets a controllable switch in a non-conductive mode.
  • a current can pass through the controllable switch while in the non-conductive more the current is blocked and cannot pass through the controllable resistor device.
  • first control signals CTRL1 and the second control signals CTRL2 may be simultaneous or non-simultaneous clocked in relation to each other which may mean that the first and second control signals are sent or received at the same time instance or in different time instances. Both simultaneous or non-simultaneous clocked control signalling works well. In the latter case when the first control signals CTRL1 and the second control signals CTRL2 are non-simultaneous clocked there is a time offset between CTRL1 and CTRL2. The frequency, clocking and time offset may be determined based on the mentioned control parameters.
  • Fig. 21 shows control signalling according to prior art while Fig. 22 shows examples of control signalling according to embodiments of the invention. In Fig.
  • the x-axis shows time and the y-axis OFF state and ON state of respective controllable switches.
  • a control signal is received by a controllable switch there is always a delay from non conductivity to fully conductivity mode or state, or vice versa, which may be denoted raise time and fall time before the component is in fully conductive mode (ON) or in blocking mode (OFF).
  • a switch may also be represented as variable resistance having a varying resistivity with mentioned raise and fall times.
  • Fig. 21 it is shown exemplary deadtimes DTs, i.e. DT1 - DT4, according to prior art.
  • DTs i.e. DT1 - DT4
  • no current is provided to a load since both resistors are in non-conductive or blocking mode, i.e. OFF.
  • each switch passes or feeds a current to the common load but never at the same time.
  • Flence during time period ON1 only a first switch is in ON state is passing current to the load.
  • a second switch is in ON state is passing current to the load as shown in Fig. 21 .
  • Fig. 22 shows when the first and second controllable switches are controlled according to embodiments of the invention with overlapping power transfer conductivity. It is firstly noted that no deadtimes exists at all in Fig. 22. This may be formulated such that there is no time period when both the first and second controllable switches are in non-conductive mode, i.e. in OFF state. Further, overlap or overlapping time periods are shown in Fig. 22, and during such an overlap power transfer time period both the first (ON state) and second (ON state) controllable switches are conductive and hence pass current to the load at the same time period.
  • the first controllable switch is conductive when the second controllable switch is non-conductive, and during the second time period T2 both the first and second controllable switches are conductive.
  • the resistance R1 of the first controllable switch is raising from fully conductive to fully non-conductive state while the resistance R2 of the second controllable switch is decreasing from fully non-conductive to fully conductive state. This also means that the current via the first controllable switch will decrease accordingly and the current via the second controllable switch will increase accordingly during the second time period T2.
  • the second controllable switch is conductive when the first controllable switch is blocking.
  • Fig. 23 shows more in detail such time instances disclosing two different examples TI1 and TI2.
  • the vertical lines in Fig. 23 illustrates control signal CTRL1 , CTRL2 instances or clocking instances.
  • the control signals for the first and second controllable switches are simultaneously clocked, denoted “Sim.” in Fig. 23, compared to a second example in which the control signals are non-simultaneously clocked, denoted “non-sim.” in Fig. 23.
  • the situation during the first timer period T1 is the same as in the first example.
  • a clocking time offset is introduced between CTRL1 and CTRL2 signals which may mean that time period T2 ' is extended in time compared to time period T2.
  • the value of RT is increasing while the value of R2 is decreasing.
  • the time offset may be dependent on at least one of: a current provided to the motor 200, a voltage difference between the first and second sets of voltage modules, a resistance value when a resistance R1 of the first controllable switch 130a equals a resistance R2 of the second controllable switch 130b.
  • the switches herein may be any suitable switches known in the art.
  • solid state transistors such as MOSFET or any other transistor types.
  • the selected switch may depend on the application e.g. being high voltage or low voltage switches.
  • the switches in each module may be of a first type
  • the equalizing switches may be of a second type
  • the controllable switches in an overlap transfer circuit may be of a third type, but they may also be of the same type.
  • the high voltage switches may be any suitable high voltage switches known in the art. They should be able to handle much higher voltages than the switches in the voltage modules. For example, they could be able to handle voltages from 25 V up to 600 V if each voltage module provides 25 V.
  • the invention is not limited to the embodiments described above, but also relates to and incorporates all embodiments within the scope of the appended independent claims.

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Abstract

La présente invention se rapporte à un système (100) pour entraîner un moteur électrique. Le système (100) comprend un premier ensemble de modules de tension (112) et au moins un deuxième ensemble de modules de tension (122) connectés à un moteur électrique (200), chaque ensemble de modules de tension du système (100) est actif lorsqu'au moins l'un de ses modules de tension est en mode actif de telle sorte qu'une tension de sortie de l'ensemble actif de modules de tension est supérieure à zéro, et non actif lorsque tous les modules de tension sont en mode non actif de telle sorte qu'une tension de sortie de l'ensemble non actif de modules de tension est égale à zéro ; et configuré pour, lors de l'entraînement du moteur électrique (200) dans une première direction (D1) : i) pendant une première période de temps T1, le premier ensemble de modules de tension (112) est actif et configuré pour entraîner le moteur électrique (200) lorsque le deuxième ensemble de modules de tension (122) est non actif et configuré pour ne pas entraîner le moteur électrique (200) ; ii) pendant une deuxième période de temps T2 suivant la première période de temps T1, le premier ensemble de modules de tension (112) est actif et le deuxième ensemble de modules de tension (122) est actif de telle sorte que le premier ensemble de modules de tension (112) et le deuxième ensemble de modules de tension (122) sont configurés pour entraîner le moteur électrique (200) ; et iii) pendant une troisième période de temps T3 suivant la deuxième période de temps T2, le premier ensemble de modules de tension (112) est non actif et configuré pour ne pas entraîner le moteur électrique (200) lorsque le deuxième ensemble de modules de tension (122) est actif et configuré pour entraîner le moteur électrique (200).
PCT/EP2021/060051 2020-04-17 2021-04-19 Système d'alimentation d'un moteur électrique WO2021209640A1 (fr)

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Citations (3)

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US20170120772A1 (en) * 2015-10-30 2017-05-04 Faraday&Future Inc. Electric vehicle battery charge and discharge management
US20190103750A1 (en) * 2014-03-17 2019-04-04 GLX Power Systems Inc. Method and apparatus for creating a dynamically reconfigurable energy storage device
DE102018217382A1 (de) * 2018-10-11 2020-04-16 Robert Bosch Gmbh Verfahren zum Betrieb eines Batteriesystems und Elektrofahrzeug und Batteriesystem für ein Elektrofahrzeug

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WO2012072168A2 (fr) * 2010-11-30 2012-06-07 Technische Universität München Nouvelle topologie de convertisseur multi-niveaux permettant le montage dynamique en série et en parallèle de modules individuels
DE102014110410A1 (de) * 2014-07-23 2016-01-28 Universität der Bundeswehr München Modulares Energiespeicher-Direktumrichtersystem

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Publication number Priority date Publication date Assignee Title
US20190103750A1 (en) * 2014-03-17 2019-04-04 GLX Power Systems Inc. Method and apparatus for creating a dynamically reconfigurable energy storage device
US20170120772A1 (en) * 2015-10-30 2017-05-04 Faraday&Future Inc. Electric vehicle battery charge and discharge management
DE102018217382A1 (de) * 2018-10-11 2020-04-16 Robert Bosch Gmbh Verfahren zum Betrieb eines Batteriesystems und Elektrofahrzeug und Batteriesystem für ein Elektrofahrzeug

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