EP4285484A1 - Device for supervising an electrical system comprising a redundant machine - Google Patents
Device for supervising an electrical system comprising a redundant machineInfo
- Publication number
- EP4285484A1 EP4285484A1 EP21824628.8A EP21824628A EP4285484A1 EP 4285484 A1 EP4285484 A1 EP 4285484A1 EP 21824628 A EP21824628 A EP 21824628A EP 4285484 A1 EP4285484 A1 EP 4285484A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- setpoint
- power
- branch
- supervision device
- 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
- 238000012360 testing method Methods 0.000 claims abstract description 46
- 238000004804 winding Methods 0.000 claims abstract description 32
- 238000003745 diagnosis Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
Definitions
- TITLE SUPERVISION DEVICE FOR AN ELECTRICAL SYSTEM COMPRISING A REDUNDATED MACHINE
- the invention relates to redundant rotating electrical machines, used for technical fields requiring a high degree of operating safety, for organs linked to the safety of persons, for example in the field of automobiles, aeronautics, chemical industry, nuclear.
- the invention relates more particularly to a supervision device and a supervision method carrying out a diagnosis of such a redundant rotating electrical machine, hereinafter referred to by the expression “redundant machine” throughout the text of this document.
- a redundant machine comprises a certain number of phases, usually 3 or more phases, which are duplicated at least once to form independent windings generating an electromagnetic torque on a common shaft.
- a rotor of the machine each winding being connected to a controlled power supply comprising a dedicated control device, for example a phased current generator, which is specific to it.
- the coil and its power supply form a branch, and the redundant machine therefore comprises at least two branches.
- the architecture of such a redundant machine is generally designed so as to limit the common modes between the redundant branches as much as possible.
- each branch supplies a portion of the total power of the redundant machine, for example 50% for a simple two-branch redundancy.
- the remaining branch continues to operate and makes it possible to ensure the continuity of operation of the redundant machine, possibly in degraded mode.
- the diagnostics ensuring the correct operation of each branch must be as advanced as possible. In particular, it is important to be able carry out these diagnostics periodically. However, without requesting the redundant machine, it is difficult to make a complete diagnosis, and by requesting the redundant machine, it is possible that this disturbs the function which it is supposed to fulfill by causing an undesired rotation of the redundant machine for example .
- control unit which carries out an initial check individually on each group made up of the circuit and the winding it controls, in order to determine whether a fault has occurred or has not occurred.
- This control unit carries out this initial verification by energizing each group in a staggered manner.
- a problem with this prior art is that this initial verification is, precisely, only initial, and does not make it possible to ensure the proper functioning of each group whatever the moment, which reduces the safety operation of such a device.
- the object of the invention is to remedy this lack while allowing the verification to be imperceptible to the driver.
- the subject of the invention is a device for supervising an electrical system comprising:
- a redundant rotating electrical machine comprising a rotating shaft and at least two windings each generating an electromagnetic torque on this same rotating shaft
- control device generating a power control setpoint for the control device
- the supervision device comprising:
- this supervision device being configured so as to successively:
- all the power control setpoints can be zero, the redundant machine possibly being stopped or rotating but not consuming any current and therefore not producing any torque: even in these circumstances, the supervision makes it possible to apply the power test setpoints without changing the behavior of the redundant machine, although the latter consumes a current caused by these power test setpoints, this current changing the physical values measured following the application of the test instructions and enabling diagnosis.
- the supervision device will be able to monitor the evolution of the rotation of the rotating shaft: if the latter was initially stopped and tends to rotate under the effect of the test instructions, or to accelerate if it had a non-zero speed, the monitoring device will report a fault.
- Other physical values can also be monitored, on the machine or any element of each branch, such as excessive temperature on a power element such as the windings or an inverter component.
- the power test instructions are signed: this sign is relative from one branch to another, or from the direction of the electromagnetic flux of one coil with respect to another , and has no significance as to the very nature of the power produced or recovered by the rotating shaft since it is zero.
- the zero sum of these power test setpoints means that these power test setpoints neutralize each other. them, the resulting torque on the rotating shaft being zero.
- the sum of the power control setpoints can be zero, negative, or positive, and by convention, if necessary, the sum of the positive power control setpoints will designate when this power is consumed by the redundant machine, and by the sum negative power control setpoints when this power is generated by the redundant machine, in the case where this redundant machine has one operating mode as a motor and another as a generator.
- one of the physical values is the speed of rotation of the rotating shaft, this supervision device being configured so as to transmit simultaneously for at least two control devices of two separate branches the additional power test setpoint if each of the power control setpoints for the control device is zero.
- these redundant machines generally drive components relating to operational safety, for example the operational safety of a vehicle, and generally have long periods where the power control instructions are zero involving a current consumed by the redundant machine zero, and a zero speed but not necessarily, and therefore an impossibility of diagnosis during these long periods although the vehicle is started or in the rolling phase. Thanks to the invention, it is now possible to diagnose this electrical system even during these long periods, by generating a current in the at least two branches, this current not causing mechanical power supplied by the rotating shaft, it is that is, no torque at the output of the rotating shaft since the rotating shaft is common to the windings.
- the supervision device is configured so as to send several power test instructions at different successive power values.
- the supervision device is configured so that the sum of the control setpoint and the test setpoint of at least one branch is equal to a maximum allowed power of this branch. [019] According to one embodiment of the invention, the supervision device is configured so that the sum of the control setpoint and the test setpoint for each branch is, one after the other, equal to a maximum permitted power of this branch.
- the invention also relates to a motor vehicle comprising an electrical system comprising:
- a redundant rotating electrical machine comprising a rotating shaft and at least two windings each generating a torque on this same rotating shaft
- control device generating a power control setpoint for the control device
- this vehicle comprising a supervision device as previously described.
- this vehicle comprises an autonomous driving system controlling the control devices.
- this vehicle comprises an electric steering system controlled by the autonomous driving system, this steering system comprising a steering column motorized by the electric rotating machine.
- the supervision device sends the additional power test setpoint to the control setpoint, before each commissioning of the autonomous driving system.
- the supervision device sends the additional power test setpoint to the control setpoint when the vehicle is stationary.
- FIG 1 is a block diagram disclosing an example of a supervision device according to the invention, and an example of an electrical system that it diagnoses.
- Figure 1 discloses a supervision device S of an electrical system comprising:
- a redundant rotating electrical machine M1 comprising a rotating shaft and at least two windings B1, B2, Bn each generating an electromagnetic torque on this same rotating shaft
- a sensor Pn, Cn measuring a physical value of the branch and/or of the redundant rotating electrical machine M1.
- the supervision device S comprises:
- the supervision device S is configured so as to successively:
- the supervision device S comprises, interconnected by a communication network: - a diagnostic device 10,
- FIG. 1 illustrates for example rotating shaft speed sensors P1, P2, Pn. Note that there are as many speed sensors as branches.
- FIG. 1 also illustrates current sensors C1, C2, Cn. It will be noted that there are as many current sensors C1, C2, Cn as there are branches, each current sensor measuring the current of each phase U, V, W of the redundant machine. It is implicit that these current sensors C1, C2, Cn can be combined or replaced, analogously, by voltage, power or torque sensors for each branch.
- These inverters Ond1, Ond2, Ondn are based for example on an H bridge structure, most often consisting of electronic switches such as power transistors or thyristors.
- the control devices D1, D2, Dn generally a pulse width modulation, the source is modulated in order to construct an alternating signal of desired frequency and desired phase shift between phases when there are several phases.
- the control devices D1, D2, Dn are electronic devices which convert the power instructions emanating from the control devices DC1, DC2, DCn into switching signals from the electronic switches, generally into pulse width modulation. It will be noted that the control devices D1, D2, Dn are often integrated in the inverters Ond1, Ond2, Ondn, but not necessarily, in particular when the inverters are of high power.
- the control devices DC1, DC2, DCn are, for example, computers or calculators. They are arranged so as to generate a power setpoint for the control devices D1, D2, Dn in open loop and/or in closed loop.
- these control devices DC1, DC2, DCn comprise the means for acquiring the physical values of each branch and/or of the redundant machine M1 so as to, for example, control the generation of the power setpoints at a speed of rotation of the rotating shaft.
- Each control device DC1, DC2, DCn receives a setpoint from the control means 100, this setpoint possibly being a setpoint of torque, speed, or power required at the output of the rotating shaft.
- These control devices DC1, DC2, DCn also receive the power test instructions from the diagnostic device 10, which are added to the instructions from the control means 100.
- one of the control devices DC1, DC2, DCn can operate in an open loop by imposing a first constant power test setpoint while another of the control devices DC1, DC2, DCn operates in a loop closed by transmitting as a setpoint a second power test setpoint exactly opposite to the first second power actually obtained.
- This diagnostic device 10 like the control means 100, are for example also calculators or computers, which may or may not be partly integrated into the control devices DC1, DC2, DCn.
- these control devices DC1, DC2, DCn, the diagnostic device 10 and the control means 100 form a single calculator or computer, but this variant is less advantageous because the control devices DC1, DC2, DCn are no longer independent and therefore less reassuring because a breakdown of this supervision device S means that no more windings can be controlled.
- this supervision device S is a means that can implement a diagnostic method comprising the steps of successively:
- This supervision device S therefore comprises the means of acquisition, of processing by software instructions stored in a memory as well as the control means required for the implementation of the method. Consequently, a supervision device S, according to the invention, can be produced in the form of software (or computer (or even “software”)) modules, or else of electronic circuits (or “hardware”), or even of 'a combination of electronic circuits and software modules'.
- the source is for example a vehicle battery, not shown, supplying current to the inverters Ond1, Ond2, Ondn.
- Battery will be understood throughout the text of this document to mean an assembly comprising at least one battery module containing at least one electrochemical cell. This battery optionally comprises electrical or electronic means for managing the electrical energy of this at least one module. When there are several modules, they are grouped together in a tray or casing and then form a battery pack, this battery pack being often designated by the English expression "battery pack", this casing generally containing an assembly interface, and connection terminals.
- electrochemical cell will be understood throughout the text of this document to mean cells generating current by chemical reaction, for example of the lithium-ion (or Li-ion) type, of the Ni-Mh type, or Ni -Cd or even lead.
- This battery is for example a 12V DC battery for supplying an on-board network of a vehicle, this network in turn supplying the supervision device S.
- this battery is for example a 400V battery continuous for supplying a redundant machine M1 such as a traction or propulsion motor of the vehicle.
- these inverters Ond1, Ond2, Ondn as well as the control devices D1, D2, Dn can be integrated into the battery, or even into each module of the battery, or even onto each cell.
- the electrical or electronic means for managing electrical energy can integrate these inverters Ond1, Ond2, Ondn.
- this system may include a separate battery for each inverter Ond1, Ond2, Ondn, each of these separate batteries forming part of a branch.
- These measured physical values are for example values of the position or the speed of the rotating shaft, and/or current values of each of the phases (Un, Vn, Wn) of each winding, and/or voltage values of each of the phases (Un, Vn, Wn) of each winding and/or temperature values of each winding, and/or current leakage, temperature and voltage values of the elements of each branch.
- n is, throughout the text of this document, an index indicating the number of branches, for example in FIG. 1 illustrates an electrical system with two branches, and therefore n varies from one to two. But three or more branches can be considered.
- the redundant machine M1 represented is a three-phase machine of phase U, V, W according to the designation known to those skilled in the art. Each of these three phases is duplicated for each coil, ie for each branch.
- the electrical system comprises three branches and the diagnostic device 10 can test the branches two by two, for example by applying two test instructions each to the branch "one" and “two”. , then on the “two and “three” branch, then on the “one” and “three” branches, thus making it possible to discriminate the branch presenting a defect.
- One of the physical values is for example the speed of rotation of the rotating shaft, this supervision device S being configured so as to transmit simultaneously for at least two control devices DC1, DC2, DCn of two distinct branches the additional power test setpoint if each of the power control setpoints for the control device D1, D2, Dn is zero.
- the supervision device S is for example configured so as to send several power test instructions at different successive power values.
- these successive power values can be in the form of stages, or even in the form of a continuous increasing evolution.
- the supervision device S is for example configured so that the sum of the control setpoint and the test setpoint of at least one branch is equal to a maximum allowed power of this branch.
- This characteristic is, for example, optimal for detecting current leaks, or an excessively high internal resistance of the winding leading to an abnormal rise in temperature.
- the maximum permitted power is, for example, the maximum physical power that the inverter and/or the battery of the branch concerned can supply.
- the supervision device S is for example configured so that the sum of the control setpoint and the test setpoint for each branch is, one after the other, equal to a maximum allowed power of this branch.
- the redundant rotating electrical machine M1 comprising the rotating shaft and at least the two windings B1, B2, Bn each generating a torque on this same rotating shaft
- control device DC1, DC2, DCn generating a power control setpoint for the control device D1, D2, Dn
- this vehicle further comprising the supervision device S as previously described.
- This invention applies very advantageously to this vehicle further comprising an autonomous driving system controlling the control devices DC1, DC2, DCn.
- This vehicle comprises for example an electric steering system controlled by the autonomous driving system, this steering system comprising a steering column motorized by the electric rotating machine M1.
- this supervision device S sends the additional power test setpoint to the control setpoint, before each commissioning of the autonomous driving system.
- this supervision device S sends the additional power test setpoint to the control setpoint, when the vehicle is stationary.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2100753A FR3119276B1 (en) | 2021-01-27 | 2021-01-27 | SUPERVISION DEVICE FOR AN ELECTRICAL SYSTEM COMPRISING A REDUNDATED MACHINE |
PCT/FR2021/052131 WO2022162282A1 (en) | 2021-01-27 | 2021-11-30 | Device for supervising an electrical system comprising a redundant machine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4285484A1 true EP4285484A1 (en) | 2023-12-06 |
Family
ID=75438999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21824628.8A Pending EP4285484A1 (en) | 2021-01-27 | 2021-11-30 | Device for supervising an electrical system comprising a redundant machine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4285484A1 (en) |
CN (1) | CN117083795A (en) |
FR (1) | FR3119276B1 (en) |
WO (1) | WO2022162282A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU322999A1 (en) | 1970-06-12 | 1973-08-10 | METHOD OF OBTAINING ESTRADIOL-17R 3-METHYL ETHER | |
JP5370139B2 (en) * | 2009-12-25 | 2013-12-18 | 株式会社デンソー | Electric power steering device |
US9862406B2 (en) | 2013-11-08 | 2018-01-09 | Mitsubishi Electric Corporation | Electric power steering control apparatus and electric power steering control method |
JP6630539B2 (en) * | 2015-11-05 | 2020-01-15 | 日立オートモティブシステムズ株式会社 | Power conversion device and electric power steering device |
-
2021
- 2021-01-27 FR FR2100753A patent/FR3119276B1/en active Active
- 2021-11-30 CN CN202180092144.2A patent/CN117083795A/en active Pending
- 2021-11-30 WO PCT/FR2021/052131 patent/WO2022162282A1/en active Application Filing
- 2021-11-30 EP EP21824628.8A patent/EP4285484A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2022162282A1 (en) | 2022-08-04 |
CN117083795A (en) | 2023-11-17 |
FR3119276B1 (en) | 2022-12-09 |
FR3119276A1 (en) | 2022-07-29 |
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