WO2022258277A1 - Verfahren zum bestimmen von phasenströmen, steuereinrichtung, antriebssystem sowie kraftfahrzeug - Google Patents
Verfahren zum bestimmen von phasenströmen, steuereinrichtung, antriebssystem sowie kraftfahrzeug Download PDFInfo
- Publication number
- WO2022258277A1 WO2022258277A1 PCT/EP2022/062555 EP2022062555W WO2022258277A1 WO 2022258277 A1 WO2022258277 A1 WO 2022258277A1 EP 2022062555 W EP2022062555 W EP 2022062555W WO 2022258277 A1 WO2022258277 A1 WO 2022258277A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phase current
- phase
- determined
- values
- measured
- 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.)
- Ceased
Links
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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
-
- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
-
- 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/429—Current
Definitions
- the invention relates to a method for determining phase currents for current regulation of an electric machine of a drive system for a motor vehicle. Measured curves of the phase currents, which are supplied to at least three phases of a phase set of the electrical machine and which are measured by at least three phase current sensors of a phase current sensor set of the drive system, are received.
- the invention also relates to a control device, a drive system and a motor vehicle.
- the electric machine is designed to provide a specific torque or drive torque for the motor vehicle and includes a stator and a rotor which is rotatably mounted with respect to the stator.
- the stator usually has at least one phase set with at least three phases or stator phases.
- a multi-phase current is fed to the at least one phase set in order to generate a torque-specific rotary magnetic field in the stator.
- each phase is electrically connected to an inverter branch of an inverter of the drive system, via which each phase is supplied with a phase current, in particular a sinusoidal phase current.
- the three phase currents form the polyphase current.
- the drive system has a current controller which can predefine desired curves of the phase currents based on actual curves of the phase currents.
- a set of phase current sensors is usually provided for detecting the actual curves, which set has, for example, a phase current sensor for each phase.
- the measured actual curves of the phase currents can be due to different amplification factors of the phase current sensors deviate from the actual course of events. These different gain factors can adversely affect the operation of the inverter.
- the inverter has a specific operating range which is increased by a tolerance range with regard to peak values of the phase currents.
- the inverter is usually switched off.
- the peak currents can in particular then leave the tolerance range of the inverter if at least one phase current sensor outputs a measured course of the phase current due to an amplification factor that is too low, which is below the actual course of the phase current.
- the phase current sensors are usually calibrated regularly.
- the offset values and the amplification factors of the phase current sensors are set.
- the offset value is carried out with a safe zero current, i.e. when the drive system is switched off.
- the amplification factor is usually determined indirectly using a phase-locked loop (PLL) during operation of the drive system. The procedure for determining the gain factor has proven to be slow and imprecise.
- PLL phase-locked loop
- a method serves to determine phase currents for current regulation of an electric machine of a drive system for a motor vehicle.
- measured curves of the phase currents which are supplied to at least three phases of a phase set of the electrical machine and which are measured by at least three phase current sensors of a phase current sensor set of the drive system, are received.
- zero crossings are detected in the at least three measured, phase current sensor-specific curves, and a phase current value of at least one other measured curve is determined for at least one zero crossing.
- an amplification factor of the respective phase current sensor is determined for each phase current sensor Phase current sensor descriptive characterization value determined.
- the phase currents for current control are determined taking into account the characterization values of the phase current sensors.
- the invention also relates to a control device for a drive system of a motor vehicle, which is designed to carry out a method according to the invention.
- the invention includes a drive system for a motor vehicle, which has at least one electric machine.
- the electrical machine has at least one phase set, each with at least three phases.
- the drive system includes a phase current sensor set with at least three phase current sensors for measuring the phase currents supplied to the phases and a control device according to the invention.
- the electrical machine which has a stator and a rotor, can be a permanent magnet synchronous machine (PSM) or a current-excited synchronous machine (SSM), for example, and can provide a drive torque for the motor vehicle.
- PSM permanent magnet synchronous machine
- SSM current-excited synchronous machine
- the electrical machine can be a three-phase machine, for example, and thus have a phase set with three (stator) phases.
- the electrical machine can also be a six-phase machine and have two phase sets, each with three phases.
- the at least one phase set is electrically connected to an inverter of the drive system, which converts the direct current provided by an electrical energy store of the drive system into a multi-phase alternating current for the phase set.
- the multi-phase current consists in particular of three sinusoidal, phase-shifted phase currents, which are impressed on the phases of the electrical machine.
- the drive system also has a phase current sensor set for each phase set to control the multi-phase current.
- the set of phase current sensors has, in particular, a phase current sensor for each phase, which measures the phase current of the respective phase on the inverter output side and on the machine input side. Since these measured actual curves of the phase currents are the basis for the current control and are dependent on the amplification factors of the phase current sensors, the amplification factors of the phase current sensors are validated and taken into account when determining the phase currents. For this purpose, the zero crossings are determined from the measured, phase-specific current curves.
- phase current sensor-specific characterization value is determined as a function of the measured phase current value of at least one phase current sensor at the measured zero crossing of another phase current sensor, which in turn is dependent on the amplification factor of this phase current sensor.
- the phase currents used for current regulation can then be determined as a function of the phase current sensor-specific characterization values, and thus as a function of the amplification factors of the phase current sensors.
- the two phase current sensors with the largest gain factors are selected by filtering out the phase current sensor with the smallest gain factor based on the characterization values.
- the phase currents add up to zero at all times, so that the third phase current can be calculated from two measured phase currents.
- phase current sensors which have the greatest amplification factors can be selected on the basis of the characterization values and used to measure the phase current curves of two of the three phases for the current control.
- the course of the third phase is not measured by the phase current sensor with the lowest gain, but calculated from the other two courses.
- the current control is therefore only carried out using the phase current sensors with the largest amplification factors. In this way, current peaks that result from the faulty current regulation due to an amplification factor that is too low can be avoided, and the tolerance range of the inverter can thereby be enlarged in an advantageous manner.
- the phase current value of the curve measured by this phase current sensor at a zero crossing of another curve is determined as the characterization value of a phase current sensor.
- the associated phase current values which are located, for example, on the rising edge, of the other courses determined as characterization values.
- At least one characterization value in the form of a phase current value is thus obtained for each phase current sensor, it being possible for the phase current values of the phase current sensors to be compared with one another. If the amplification factors of the phase current sensors are ideally identical, the phase current values of the different phases should be the same. If they are different, this can indicate different amplification factors of the phase current sensors. However, this assumes that the fundamental wave amplitude of the current curves does not change over a longer period of time.
- the associated phase current values of the two other curves are determined for each zero crossing of a curve.
- a relative deviation of the gain factors of the two associated phase current sensors is determined using these phase current values, and the characterization values are determined using the relative deviations.
- the relative deviation of the amplification factors of two phase current sensors is determined as the difference between the associated phase current values based on the arithmetic mean value of the phase current values.
- a phase pair can therefore be determined from the phase current values of the two other curves at a zero crossing of each curve.
- the invention also includes a motor vehicle with a drive system according to the invention.
- the motor vehicle is designed as an electrically drivable motor vehicle.
- Fig. 1 is a schematic representation of an embodiment of a
- the electrical machine 4 is a three-phase electrical machine here 4 and has a phase set with three phases u, v, w.
- a phase current iu*, iv*, iw* is impressed on the phases uv, w by the inverter 3 in order to provide a specific torque by the electric machine 4 .
- These phase currents iu*, iv*, iw* are controlled by a current controller 5 of the drive system 1 for torque control.
- the drive system 1 has a phase current sensor set for each phase set.
- the phase current sensor set has a the first phase current sensor Au associated with the phase u, a second phase current sensor Av associated with the phase v, and a third phase current sensor Aw associated with the phase w.
- the phase current sensors Au, Av, Aw measure the phase current curves iu, iv, iw over time, which can deviate from the actual phase current curves iu*, iv*, iw* due to different amplification factors of the phase current sensors Au, Av, Aw.
- Actual actual curves iu*, iv*, iw* and the measured curves iu, iv, iw deviating therefrom are shown in FIG.
- the measured profile iu is above the actual profile iu*
- the measured profile iv corresponds to the actual profile iv*
- the measured profile iw is below the actual profile iw*.
- the first phase current sensor Au thus has the greatest amplification factor here and the phase current sensor Aw has the smallest amplification factor.
- the amplification factors of the phase current sensors Au, Av, Aw are taken into account in the current control.
- the curves iu, iv, iw measured by the phase current sensors Au, Av, Aw are fed to a control device 6 of the drive system 1 .
- the control device 6 can also be integrated into the current controller 5 .
- the control device 6 is designed to determine the phase currents for the current regulation, taking the amplification factors into account.
- the control device 6 selects those phase current sensors Au, Av with the greatest amplification factors and feeds the phase currents iu, iv measured by these phase current sensors Au, Av to the current controller 5 .
- the measured current curve iw of the phase current sensor Aw with the lowest amplification is not fed to the current controller 5, but the current curve iw ⁇ is calculated using the measured phase currents iu, iv and fed to the current controller 5.
- the control device 6 can determine the respective amplification factor or a characterization value of the phase current sensors Au, Av, Aw that characterizes the amplification factor. For this purpose, the control device 6 determines, as shown in FIG. 2, zero crossings Nu1, Nv1, Nw1, Nu2, Nv2, Nw2 of the measured current curves iu, iv, iw. There are two zero crossings Nu1, Nv1, Nw1, Nu2, Nv2, Nw2 for each measured course iu, iv, iw per fundamental wave period.
- Iv2(w), Iw1(u), Iw2(u), Iw1(v), Iw2(v) of the other curves iu, iv, iw are determined.
- the phase current values Iw1(u) of curve iw and Iv1(u) of curve iv are thus determined at the first zero crossing Nu1 of the measured curve iu.
- the phase current values Iv2(u) of curve iv and Iw2(u) of curve iw are determined for the second zero crossing Nu2 of the measured curve iu.
- the phase current values Iu1(w) of curve iu and Iv1(w) of curve iv are determined for the first zero crossing Nw1 of the measured curve iw, etc.
- the amplification factors of the offset-calibrated phase current sensors Au, Av, Aw can then be calculated and compared with one another.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/283,030 US12500538B2 (en) | 2021-06-11 | 2022-05-10 | Method for determining phase currents, control device, drive system, and motor vehicle |
| CN202280018182.8A CN116918240A (zh) | 2021-06-11 | 2022-05-10 | 用于确定相电流的方法、控制装置、驱动系统以及机动车 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021115138.4A DE102021115138A1 (de) | 2021-06-11 | 2021-06-11 | Verfahren zum Bestimmen von Phasenströmen, Steuereinrichtung, Antriebssystem sowie Kraftfahrzeug |
| DE102021115138.4 | 2021-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022258277A1 true WO2022258277A1 (de) | 2022-12-15 |
Family
ID=81975293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/062555 Ceased WO2022258277A1 (de) | 2021-06-11 | 2022-05-10 | Verfahren zum bestimmen von phasenströmen, steuereinrichtung, antriebssystem sowie kraftfahrzeug |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12500538B2 (de) |
| CN (1) | CN116918240A (de) |
| DE (1) | DE102021115138A1 (de) |
| WO (1) | WO2022258277A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006304483A (ja) * | 2005-04-20 | 2006-11-02 | Toyota Motor Corp | 電流センサの特性補正装置 |
| US20090189553A1 (en) * | 2008-01-29 | 2009-07-30 | Arnet Beat J | Method and system for multiphase current sensing |
| EP2607914A1 (de) * | 2011-12-19 | 2013-06-26 | LSIS Co., Ltd. | Vorrichtung und Verfahren zum Ausgleichen des Versatzes eines Stromsensors |
| DE102019130638A1 (de) * | 2018-11-16 | 2020-05-20 | Hyundai Mobis Co., Ltd. | Vorrichtung und Verfahren zur Steuerung eines Motors |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4913661B2 (ja) * | 2007-04-26 | 2012-04-11 | ルネサスエレクトロニクス株式会社 | インバータ装置及びそれに用いられる半導体装置。 |
| JP5211869B2 (ja) * | 2008-06-10 | 2013-06-12 | トヨタ自動車株式会社 | 電動機制御装置およびオフセット判定方法並びにオフセット補正方法 |
| JP2010110067A (ja) * | 2008-10-29 | 2010-05-13 | Hitachi Automotive Systems Ltd | モータ制御装置 |
| AT511283B1 (de) * | 2011-03-21 | 2013-01-15 | Seibt Kristl & Co Gmbh | Vorrichtung und verfahren zur korrektur von strangströmen einer drehstrommaschine |
-
2021
- 2021-06-11 DE DE102021115138.4A patent/DE102021115138A1/de active Pending
-
2022
- 2022-05-10 WO PCT/EP2022/062555 patent/WO2022258277A1/de not_active Ceased
- 2022-05-10 CN CN202280018182.8A patent/CN116918240A/zh active Pending
- 2022-05-10 US US18/283,030 patent/US12500538B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006304483A (ja) * | 2005-04-20 | 2006-11-02 | Toyota Motor Corp | 電流センサの特性補正装置 |
| US20090189553A1 (en) * | 2008-01-29 | 2009-07-30 | Arnet Beat J | Method and system for multiphase current sensing |
| EP2607914A1 (de) * | 2011-12-19 | 2013-06-26 | LSIS Co., Ltd. | Vorrichtung und Verfahren zum Ausgleichen des Versatzes eines Stromsensors |
| DE102019130638A1 (de) * | 2018-11-16 | 2020-05-20 | Hyundai Mobis Co., Ltd. | Vorrichtung und Verfahren zur Steuerung eines Motors |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021115138A1 (de) | 2022-12-15 |
| US12500538B2 (en) | 2025-12-16 |
| CN116918240A (zh) | 2023-10-20 |
| US20240171106A1 (en) | 2024-05-23 |
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