EP3183810A1 - Method and device for operating an electric machine - Google Patents
Method and device for operating an electric machineInfo
- Publication number
- EP3183810A1 EP3183810A1 EP15750727.8A EP15750727A EP3183810A1 EP 3183810 A1 EP3183810 A1 EP 3183810A1 EP 15750727 A EP15750727 A EP 15750727A EP 3183810 A1 EP3183810 A1 EP 3183810A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- idc
- current
- electric machine
- input current
- pulse
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 20
- 230000001404 mediated effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 description 10
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 101100204393 Arabidopsis thaliana SUMO2 gene Proteins 0.000 description 1
- 101150112492 SUM-1 gene Proteins 0.000 description 1
- 101150096255 SUMO1 gene Proteins 0.000 description 1
- 101100311460 Schizosaccharomyces pombe (strain 972 / ATCC 24843) sum2 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003313 weakening effect Effects 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
- 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
-
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
-
- 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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
-
- 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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
-
- 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
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/45—Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
Definitions
- the invention relates to a method for operating an electric machine according to the preamble of claim 1 and to a corresponding device.
- Electrical machines are used in the automotive industry, for example, for braking and / or steering systems of motor vehicles ⁇ application.
- Control devices that are designed to operate the electrical machines, often include an inverter and can so on the input side with a
- DC and a DC voltage are applied.
- This is advantageous for use in motor vehicles, in which the vehicle electrical system provides both a DC voltage and a DC current.
- the power to be supplied increases.
- a consequence of the increased current is additional heating of the DC or DC side electronics used to drive the machine. If the electronic components of the on ⁇ control electronics are not designed for a continuously increased power, they can be damaged.
- the load on the electrical system is increasingly burdened by the thus increasing power consumption and further decreasing supply voltage.
- the object of the invention is therefore to provide a method and a device for operating an electrical machine, which or which allows a higher accuracy in the specification of a current used to drive the electrical machine and which is possible as possible realized.
- the invention describes a method for operating an electrical machine, in which by means of a control device associated with the electrical machine, a pulse-modulated switching of currents of winding strands of the electric ⁇
- a current value of the DC input current of the control device is determined by using current values of the winding strands and duty cycles of the pulse modulation.
- a pulse modulation is preferred
- Pulse width modulation used.
- DC input current of the control device takes place substantially independent of temperature.
- a power requirement above a limit can be avoided, which in particular damage to the electrical machine or the electronics for controlling the same can be avoided.
- it can be dispensed with detection of the temperature by means of appropriate sensors, which costs can be saved and the error rate of the underlying system is reduced.
- one of a control device takes place substantially independent of temperature.
- the DC input current is expediently using one of products of the duty cycles of the pulse modulation of the winding strands with the corresponding currents of the
- Winding strands formed sum determined From the sizes mentioned or related variables can also be used according to the invention. Likewise, correction factors can be provided for the calculation.
- a control difference signal is determined using a predetermined maximum value of the DC input current and the determined current value of the DC input current and fed to a PI controller. advantageously, The control is thus faster and the accuracy of the calculated values is increased.
- the invention further describes a device for operating a pulse-modulated controlled electrical machine, which is designed to a current value of a
- the device according to the invention is preferably designed for carrying out the method according to the invention.
- the inventive method is preferably by a
- Control unit of a motor vehicle brake system executed
- Fig. 1 shows an embodiment for limiting a q-motor current for operating the electric machine using the estimated DC input current IDC.
- the electric machine may for example be a synchronous ⁇ machine and designed for a generator and engine operation. In principle, however, it can also be any other electrical machine.
- a synchronous machine comprises a stator with three winding strands which are each arranged as a result of 120.degree. Offset and are generally designated U, V and W. Furthermore, the synchronous machine comprises a Rotor, are arranged on the permanent magnets.
- a control ⁇ device for controlling the synchronous machine is the input side, as intended, a DC input current IDC and a DC input voltage UDC applied, which are prepared by a supplying electrical system of the motor vehicle ⁇ , which takes place for example in the case of a hybrid or electric vehicle by the battery ,
- the control device comprises an inverter which generates the currents IU, IV, IW for the individual phase windings by means of a space vector pulse width modulator.
- the concept of pulse width modulation is used only being encompassed by the present invention, an application in a similar acting driving method, for example by means Pulsfrequenzmodu ⁇ lation (PFM), as well.
- PFM Pulsfrequenzmodu ⁇ lation
- the embodiment will be described with reference to a vector control for driving the synchronous machine.
- the method according to the invention is also applicable in a comparable manner to deviating control concepts.
- the control of the electrical quantities is carried out at a vector control in a rotor-fixed coordinate system with a d-axis in the direction of the rotor magnetic field and a by 90 ° (electrical angle, linked via the pole pair with the mechanical angle) to this standing q-axis.
- a field weakening control can take place, in which a current flowing in the direction of the d-axis current is specified.
- the rotor-fixed coordinate system rotates relative to the stator, which is why the phase currents IU, IV, IW and corresponding voltages UU, UV, UW of the winding phases of the stator via a suitable transformation, for. B. Clarke Park transformation, are determined by the rotor position.
- a suitable transformation for. B. Clarke Park transformation
- the voltages of the winding strands can be specified.
- the determined variables are based on a pulse width modulation, z.
- B. a space vector modulation (SVPWM), periodically driving levels and these corre ⁇ sponding periods determined in which a respective phase winding is connected by the drive circuit to the upper or lower potential of the supply voltage.
- SVPWM space vector modulation
- Pulse width modulation PWM be used.
- the electrical power PEL picked up by the synchronous machine corresponds to the output power of the control device, whereby according to Eq. (1) can be calculated from the multiplication of the input power PDC with the efficiency nlNV of the control device.
- PEL nlNV ⁇ PDC
- the efficiencies of modern inverters are greater than 95%, so that the input power of the control device comprising the inverter or the input power PDC is approximately equal to the output power PEL.
- a voltage of a phase winding results as the mean value of the voltage over a PWM period.
- the voltages UU, UV and UW of the individual phase windings thus result as a product of the duty cycle of the pulse width modulation of the respective phase winding and the DC input voltage UDC, wherein the duty cycle is calculated from the ratio of the pulse duration to the period. Deviating calculation rules with the same effect can also be used.
- equation (5) is obtained.
- Equation (5) can be transformed into equation (6), thus obtaining an expression for calculating the DC input current IDC, which depends only on the currents IU, IV and IW and the duty cycles of the pulse width modulation and is substantially independent of temperature.
- the duty cycles of the pulse width modulation are preferably obtained from the signal profiles of the currents IU, IV and IW detected by means of sensors.
- Control device or the inverter are used.
- DC input current IDC is preferably used by a limiter ⁇ tion unit, which is explained in more detail with reference to FIG. 1. However, it can also be used for any other purposes.
- Fig. 1 is in a
- Summing point SUM1 a control difference E from the difference of a predetermined maximum value IDC, MAX of the DC input current and the estimated value IDC, EST of the current DC input current determined, which is determined by equation (6).
- a controller 1 is provided, to which the control difference E is fed on the input side, and which is preferably designed as a PI controller.
- the output signal of regulator 1 is fed to the input side of limiter 2, which is designed in such a way that a control signal Y generated on the output side can not assume positive values.
- control signal Y and a predetermined maximum value Iq, MAX of the current to be impressed into the q-axis are summed and the value of the result thus obtained is limited to maximum permissible values by means of limiter 3.
- the current Iq, MAX, CORR is provided to the machine.
- the pre-given maximum value Iq, MAX is preferably calculated by the control device ⁇ based on the respective requirements for the synchronous machine.
- control difference E has a value greater than zero, that is, if the estimated DC input current IDC, EST is less than the predetermined maximum value IDC, MAX
- the control signal Y is reduced in the direction 0 because the limiter 2 prevents the control signal Y values from being greater can take zero.
- Iq, MAX Iq, MAX, CORR. If the control difference E ⁇ 0, the value of the corrected maximum current Iq, MAX, CORR corresponds to the predetermined maximum current Iq, MAX reduced by the control signal Y.
- Equation (6) or the term for calculating the electrical power Pel of the electric machine are used to make a correction of a calculated on the basis of the present values and an engine model the mechanical power of the electric machine and / or as a state variable of a Leis ⁇ processing control of the electric Machine are used.
- a time constant of the calculation of the correction can be comparatively large, in particular in the case of the consideration of temperature influences, since the time constants of these are slow in comparison to time constants of other control factors to be considered.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14465520 | 2014-08-22 | ||
DE102014220516.6A DE102014220516A1 (en) | 2014-08-22 | 2014-10-09 | Method and device for operating an electrical machine |
PCT/EP2015/068643 WO2016026760A1 (en) | 2014-08-22 | 2015-08-13 | Method and device for operating an electric machine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3183810A1 true EP3183810A1 (en) | 2017-06-28 |
Family
ID=51564615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15750727.8A Withdrawn EP3183810A1 (en) | 2014-08-22 | 2015-08-13 | Method and device for operating an electric machine |
Country Status (4)
Country | Link |
---|---|
US (1) | US10236809B2 (en) |
EP (1) | EP3183810A1 (en) |
DE (1) | DE102014220516A1 (en) |
WO (1) | WO2016026760A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105811818B (en) * | 2016-05-04 | 2018-03-16 | 哈尔滨工业大学 | Current setting approach for 45 ° of phase winding open fault faults-tolerant controls of four phase permagnetic synchronous motor of facies tract angle one |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806787A (en) * | 1973-08-20 | 1974-04-23 | Gen Electric | Circuit for generating a voltage proportional to motor armature current |
US4290001A (en) * | 1979-08-03 | 1981-09-15 | General Electric Company | Closed loop, microcomputer controlled pulse width modulated inverter-induction machine drive system |
US4469997A (en) * | 1981-05-11 | 1984-09-04 | Imec Corporation | Self generative PWM voltage source inverter induction motor drive |
US4368411A (en) * | 1981-07-13 | 1983-01-11 | Kollmorgen Technologies Corporation | Control system for electric motor |
JPS5833998A (en) * | 1981-08-21 | 1983-02-28 | Hitachi Ltd | Control system of induction motor by pulse width modulation inverter |
JPS5886888A (en) * | 1981-11-16 | 1983-05-24 | Hitachi Ltd | Control system of induction motor |
JPS58157384A (en) * | 1982-03-12 | 1983-09-19 | Fanuc Ltd | Drive system for ac motor |
US4602201A (en) * | 1984-06-05 | 1986-07-22 | Westinghouse Electric Corp. | PWM motor drive with torque determination |
US4673851A (en) * | 1986-03-31 | 1987-06-16 | General Motors Corporation | PWM motor operating system with RFI suppression |
WO2008053554A1 (en) * | 2006-11-02 | 2008-05-08 | Mitsubishi Electric Corporation | Electric motor car control apparatus |
KR20080068254A (en) * | 2007-01-18 | 2008-07-23 | 삼성전자주식회사 | Apparatus for detecting input current of inverter and method thereof |
DE102007017296A1 (en) | 2007-02-16 | 2008-08-21 | Siemens Ag | Method for operating electrical machine, involves determining equal input current of control device, which is assigned to electrical machine by observer depending on effective power balancing of electrical machine |
JP2010178556A (en) * | 2009-01-30 | 2010-08-12 | Toyota Motor Corp | Motor drive system |
JP2010268629A (en) * | 2009-05-15 | 2010-11-25 | Toyota Industries Corp | Inverter device |
DE102012215811A1 (en) * | 2012-09-06 | 2014-03-06 | Robert Bosch Gmbh | Inverter for driving an electrical load and method for operating an inverter |
-
2014
- 2014-10-09 DE DE102014220516.6A patent/DE102014220516A1/en active Pending
-
2015
- 2015-08-13 EP EP15750727.8A patent/EP3183810A1/en not_active Withdrawn
- 2015-08-13 WO PCT/EP2015/068643 patent/WO2016026760A1/en active Application Filing
-
2017
- 2017-02-22 US US15/439,348 patent/US10236809B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20170163188A1 (en) | 2017-06-08 |
WO2016026760A1 (en) | 2016-02-25 |
US10236809B2 (en) | 2019-03-19 |
DE102014220516A1 (en) | 2016-02-25 |
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Legal Events
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AX | Request for extension of the european patent |
Extension state: BA ME |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BUDIANU, BOGDAN Inventor name: GRADINARU, VLAD Inventor name: KAUFMANN, TOM Inventor name: MARCU, BOGDAN |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 20171011 |