AU2017275457B2 - Method for operating an electrical machine - Google Patents

Method for operating an electrical machine Download PDF

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Publication number
AU2017275457B2
AU2017275457B2 AU2017275457A AU2017275457A AU2017275457B2 AU 2017275457 B2 AU2017275457 B2 AU 2017275457B2 AU 2017275457 A AU2017275457 A AU 2017275457A AU 2017275457 A AU2017275457 A AU 2017275457A AU 2017275457 B2 AU2017275457 B2 AU 2017275457B2
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AU
Australia
Prior art keywords
converters
current
electrical machine
group
coils
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.)
Active
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AU2017275457A
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AU2017275457A1 (en
Inventor
Christian Meyer
Ralf Wilcke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
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.)
Filing date
Publication date
Priority claimed from DE102016209606.0A external-priority patent/DE102016209606A1/en
Priority claimed from DE102016209602.8A external-priority patent/DE102016209602A1/en
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Publication of AU2017275457A1 publication Critical patent/AU2017275457A1/en
Application granted granted Critical
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Assigned to Siemens Energy Global GmbH & Co. KG reassignment Siemens Energy Global GmbH & Co. KG Request for Assignment Assignors: SIEMENS AKTIENGESELLSCHAFT
Active legal-status Critical Current
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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
    • H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/1752—Masking
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/22—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing
    • B63H23/24—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing electric
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/123—Synchrophasors or other applications where multiple noise sources are driven with a particular phase relationship
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/127—Underwater acoustics, e.g. for submarine
    • 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
    • H02P2101/35—Special adaptation of control arrangements for generators for ships

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Electric Motors In General (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to a method for operating an electrical machine (2), especially for driving vehicles, in particular submarines. Said electrical machine (2) comprises a stator having a plurality of coils, and a plurality of converters (10a, 10b) for supplying current to the coils. In order to reduce noise when the electrical machine is operated a first current (I

Description

The invention relates to a method for the noise-optimized operation of an electrical machine, which is provided especially for driving vehicles, in particular submarines, comprising a stator which has a number of coils and a number of converters for supplying current to the coils. The invention further relates to an electrical machine, which is provided especially for driving vehicles, in particular submarines, comprising a stator, which has a number of coils, and a number of converters for supplying current to the coils. The invention finally relates to a vehicle, in particular a submarine, having such an electrical machine.
An electrical machine for the propulsion drive of a submarine with a permanent magnetexcited synchronous machine is described in the patent application WO 2004/068694 Al, for instance. In such cases a stator winding is embodied as a wave winding and has a plurality of phase windings. Each phase winding is supplied by in each case one converter only provided for this phase winding. The converters which supply the stator winding are arranged in the interior of the permanent magnet-excited synchronous machine in the axial direction in a converter bearing frame and form converter modules.
During operation of the majority of vehicles, the aim frequently is to dampen loud noises or to avoid them completely. This is the case during what is known as silent running of a submarine, for instance, with which installations on the submarine, the operation of which is not necessarily required, are switched off. With silent running of a submarine, the engine noises themselves are to be dampened as much as possible.
The patent application DE 10 2010 043973 Al describes methods for generating a noise in a motor vehicle driven by an electric motor.
The patent application DE 103 01 272 Al describes an electrical machine for the propulsion drive of a submarine with a permanent magnet-excited synchronous machine. A high reduction in the noises produced during its operation is to be achieved with little outlay and an increased degree of winding and ground fault reliability compared with the prior art is to be ensured. It is proposed that the stator winding be embodied as a wave winding and have a plurality of phase windings. Each phase winding of the wave winding is supplied by a
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2017275457 02 Oct 2019 separate, single-phase converter. The converters in the form of converter modules are disposed in the interior of the synchronous machine.
Aspects seek to provide as quiet an operation of an electrical machine as possible or to provide a vehicle with such a quiet electrical machine, or at least provide a useful alternative to the existing arrangements discussed above.
Aspects provide a method for operating an electrical machine, comprising a stator, which has a number of coils, and a number of converters for supplying current to the coils, wherein a first current, which has a fundamental oscillation with superimposed harmonic components, is supplied to the assigned coils with a respective phase offset by means of a first group of converters, and at the same time a second inverted current, which is modified with respect to the harmonic components of the first current, is supplied to the assigned coils by means of a second group of converters, wherein an active noise compensation is generated by means of the inverted flow of current.
In one embodiment, the electrical machine is provided for a driving vehicle.
In another embodiment, the driving vehicle is a submarine.
In another aspect there is provided an electrical machine, comprising a stator, which has a number of coils, and a number of converters for supplying current to the coils, and a control apparatus, which is designed to operate a first group of converters for supplying a first current to the assigned coils with a respective phase offset, wherein the first current has a fundamental oscillation with superimposed harmonic components, and at the same time to operate a second group of converters for supplying a second inverted current which is modified with respect to the harmonic components of the first current, into the assigned coils, wherein the inverted flow of current is provided to generate an active noise compensation.
In one embodiment, the electrical machine is provided for a driving vehicle.
In certain embodiments, the vehicle is provided as a submarine, having such an electrical machine.
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The advantages and preferred embodiments cited below with respect to the method can be transferred analogously to the electrical machine and the vehicle.
Aspects are based on the idea of generating an active noise compensation by means of pushpulling the second group of coils. The noise is generally produced in the coils which are energized with the first current by the first group of converters, which are provided to operate the electrical machine in order to generate an electrical torque. To generate a rotary field, the converters of the first group supply the first current with a respective phase offset into the respective coils.
The second group of converters represents converters which are not required for normal operation or a partial load operation of the electrical machine. In accordance with certain embodiments, these converters are used to supply current to the coils which they energize, especially with the same frequency-response but with a flow of current which is modified with respect to the harmonic components of the first current. The modified flow of current represents in particular current which is inverted with respect to the flow of the first current.
“Modified current” is to be understood here to mean that the second current is modified on the basis of the first current, so that a push-pulling, e.g. by reversing the current signal, is therefore to be generated for a desired period of time. The amplitude of the push-pulling is not necessarily the same as that of the harmonic components of the first group. The flow of the second current can inter alia be modified by a factor, wherein the factor can be variable in terms of time, i.e. the modification is not carried out continuously, or a differently modified flow of current exists at different time segments. In addition or alternatively, the amplitude of the modified second current can likewise be varied in terms of time by changing the factor.
“Group of converters” is to be understood here to mean a number of one, two and more converters, which are controlled equally. A spatial proximity of the converters within the group is advantageous, but not absolutely necessary, i.e. the group is not defined by way of the spatial distribution of the converters, but instead by way of its function.
The active noise reduction (ANR) or active noise cancellation (ANC) is known and is used in industry e.g. in active exhaust silencers for vehicles. The principle is based on the generation
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2017275457 02 Oct 2019 of sound, in order to delete an interfering sound by means of destructive interference. To this end a signal is generated, which corresponds exactly to that of the interfering sound with reverse polarity. With the known products which are based on this principle and used in electrical engines, sensors are attached to the installation in order to slow down the excited motor structures, said sensors firstly absorbing the ambient noise and phase-offset clearance signals are then applied by means of actuators. Success can therefore be achieved below 1 kHz, since the synchronous phase shift cannot be realized sufficiently rapidly in this way.
In contrast, in accordance with certain embodiments, the pulsing of the active coils disposed in engagement with the first group of converters is known and the current parameters must therefore not be determined. This dispenses with a computing power and the push-pulling is already carried out more accurately and rapidly at the source of the noise.
According to a preferred embodiment, the second inverted current which is modified with respect to the harmonic components of the first current is generated during normal operation or partial load operation of the electrical machine, since not all converters are required for the torque generation. Such a noise compensation is particularly advantageous especially with a quiet silent running of a submarine, since in this case the full power of the electrical machine is not necessarily decisive, but the primary objective is to operate the drive of the submarine in a particularly low-noise manner.
According to a further preferred embodiment, the first group of converters and the second group of converters are used in a full load operation to generate an electrical torque in the electrical machine. The coils which are energized by the second group of converters are therefore also no longer used to generate counter noise, but instead with a full load operation these coils, similarly to the coils of the first group of converters, are used to operate the electrical machine, so that a particularly high power of the electrical machine is reached.
Advantageously one part of the converter is arranged within a machine housing and one part of the converter is arranged outside of the machine housing and the second group is formed by converters outside of the machine housing. A machine housing is understood here to mean a housing of the electrical machine, which encloses both a rotor and also the stator. Here the outer converters are preferably mounted as close as possible to the machine housing, in
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2017275457 02 Oct 2019 particular on the machine housing. The outer converters are in particular those which are not required for normal operation of the electrical machine. They are therefore preferably only activated in full load mode of the electrical machine toward the inner converters or they are used with regard to a particularly quiet operation of the electrical machine (e.g. silent running of a submarine driven by the electrical machine) for active sound compensation.
In a further advantageous embodiment, not all converters required for operation of the electrical machine are arranged in the interior of the rotor, but a number of converters is mounted outside of the rotor, but as close as possible to the electrical machine. In this regard with an increasing number of required converters, the diameter of the electrical machine, in particular the diameter of the machine housing, is not increased. At the same time, no expensive guiding of cables in the surroundings of the electrical machine is required on account of the spatial proximity of the further converters with respect to the motor. As a result, only one part of the converters is stored, the space requirement outside of the housing is also not very large.
According to a preferred embodiment, the further converters are arranged on an exterior of the machine housing. This ensures that the converters are positioned as close as possible to the electrical machine, in particular form an integral part of the electrical machine, by being fixedly connected to the machine housing. A further advantage of this embodiment is that essentially no electrical cables are guided outside of the electrical machine. The further converters are combined in a group, for instance, which is enclosed in particular by a housing so that an interference-free operation of the converters is enabled and moreover the stray radiation at the periphery is particularly low. Alternatively, the further converters are distributed individually or in a number of groups on the machine housing.
With respect to a particularly space-saving solution, in accordance with a further preferred embodiment the further converters are arranged on the periphery of the machine housing. On account of a good accessibility, the outer periphery of the machine housing is already used to attach components, which are required for the operation of the electrical machines, e.g. for regulating and controlling the converters, for a cooling system of the drive, for sensor systems etc. The free space available on the outer periphery is therefore best suited to receiving the
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2017275457 02 Oct 2019 further converters and offers flexibility when selecting the precise position of the further converters, without the diameter of the machine housing being enlarged in the process.
The control apparatus is advantageously designed to operate only some of the converters during normal operation or in a partial load operation. Normal operation is understood here to mean any point in time during the operation of the electrical machine with the exception of the start-up and shut-down and the maintenance. Partial load operation is understood to mean an operation with a reduced power. The control apparatus is used here to control and/or regulate the converters, the control apparatus can however also carry out other tasks in conjunction with the operation of the electrical machine, e.g. the processing of sensor data. During normal operation or partial load operation, not all converters are required, the number of converters which are switched on can therefore be reduced to a required minimum. By switching off some of the converters, the electrical losses which arise due to the converters which are not required for operation of the electrical machine are minimized. This improves the degree of efficiency of the electrical machine.
Expediently the control apparatus is designed firstly to operate the converters within the machine housing. Here only part of the converters within the machine housing are operated during partial load operation and during normal operation in particular all converters are operated within the machine housing and only in a full load operation are the further converters, which are disposed outside of the machine housing, switched on. Full load operation here is understood to mean operation with the maximum achievable power. The advantage of firstly commissioning the inner converters is that the stray radiation, which is produced by the converter during its operation, is shielded by the machine housing. The outer converters are additionally only connected to the inner converters in full load operation, so that additional stray radiation is only produced over a short period of time.
One exemplary embodiment of the invention will be described in greater detail with reference to a drawing. In the figures:
FIG 1 shows an exemplary electrical machine, and
FIG 2 shows a first current and a second current for push-pulling the first current.
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2017275457 02 Oct 2019
FIG 1 shows an exemplary electrical machine 2, in particular an electrical motor, which comprises a rotor 4, which is embodied in this regard in the manner of a bell-shaped rotor, and comprises a stator, not shown here in detail, which is arranged radially outside of the bellshaped rotor. In the broader sense, both the rotor and also the stator, which are shown as one unit, are identified with the reference character 4. The rotor 4 and the stator are accommodated in a machine housing 8. A drive shaft 6 of the rotor 4 is also shown in the Figure.
A number of converters 10a are arranged in the interior of the bell-shaped rotor 4. In the exemplary embodiment shown, 16 converters 10a are positioned around the inner periphery of the bell-shaped rotor 4.
Furthermore, the electrical machine 2 comprises, e.g. two or four further converters 10b, not shown here in more detail, which are arranged in a housing 12 on the outer periphery of the machine housing 8. The housing 12 moreover contains means suitable for cooling the converters 10b.
The electrical machine 2 also has a control apparatus 14, which is shown symbolically. The control apparatus 14 controls and regulates the operation of the electrical machine 2, the control apparatus 14 defines, inter alia, which converters 10a, 10b are switched on during operation of the electrical machine 2. Provision is made here for only one part of the converters 10a, 10b to be operated for torque generation during normal operation or partial load operation of the electrical machine 2. In particular, the converters 10a within the bellshaped rotor 4, which are enclosed by the machine housing 8, are firstly switched on and these supply a first current Ii into the corresponding coils, said current having an in particular fundamental oscillation G with superimposed, in particular harmonic components O. The first current Ii is visible in FIG 2.
The fact that only the converters 10a are in operation means that stray radiation is minimized or entirely avoided by the outer converters 10b. The further converters 10b, which are positioned outside on the machine housing 8, are in particular only switched on during full load operation.
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2017275457 02 Oct 2019
According to FIG 2, the further converters 10b are used within the scope of an active noise compensation, so that they supply current I2 with a curve which is modified, in the exemplary embodiment shown inverted, with respect to the harmonic components O of the first current Ii into some of the coils. The second current I2 can however deviate from the first current I2 with respect e.g. to its amplitude.
In the present exemplary embodiment, the inner converters form a first group and the outer converters form a second group of converters. Other spatial distributions of the converters of the first and second functional groups are also possible, however.
During full load operation, as already mentioned, the converters 10b of the second group generate current with the same parameters as the first current Ii, as a result of which they are likewise used to generate a torque in the electrical machine 2.
The active noise compensation described is not restricted to the use of electrical machines with a bell-shaped rotor and/or external converters, but can be applied to each electrical machine, in which the coils of the stator are energized by two or more converters.

Claims (12)

1. A method for the low-noise operation of an electrical machine, which is provided especially for driving vehicles, in particular submarines, comprising a stator, which has a number of coils, and a number of converters for supplying current to the coils, wherein a first current, which has a fundamental oscillation with superimposed harmonic components is supplied to the assigned coils with a respective phase offset by means of a first group of converters, and at the same time a second inverted current which is modified with respect to the harmonic components of the first current is supplied to the assigned coils by means of a second group of converters, wherein an active noise compensation is generated by means of the inverted flow of current.
2. The method as claimed in claim 1, wherein the second inverted current which is modified with respect to the harmonic components of the first current is generated during normal operation or a partial load operation of the electrical machine.
3. The method as claimed in claim 1 or 2, wherein a full load operation the first group of converters and the second group of converters are used to generate an electrical torque in the electrical machine.
4. The method as claimed in one of the preceding claims, wherein one part of the converters is arranged within a machine housing and one part of the converters is arranged outside of the machine housing and the second group is formed by converters outside of the machine housing.
5. An electrical machine comprising a stator, which has a number of coils, and a number of converters for supplying current to the coils, comprising a control apparatus, which is designed to operate a first group of converters for supplying a first current into the assigned coils with a respective phase offset, wherein the first current has a fundamental oscillation with superimposed harmonic components and at the same time to operate a second group of converters for supplying a second inverted current which is modified with respect to the harmonic components of the first current to the assigned coils, wherein the inverted flow of current is provided to generate an active noise compensation.
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2017275457 02 Oct 2019
6. The electrical machine as claimed in claim 5, wherein the control apparatus is embodied to generate the second inverted current which is modified with respect to the harmonic components of the first current during normal operation or a partial load operation of the electrical machine.
7. The electrical machine as claimed in claim 5 or 6, wherein the control apparatus is designed, in a full load operation to operate the first group of converters and the second group of converters to generate an electrical torque in the electrical machine.
8. The electrical machine as claimed in one of claims 5 to 7, wherein one part of the converters is arranged within a machine housing and one part of the converters is arranged outside of the machine housing and converters outside of the machine housing form the second group.
9. The electrical machine as claimed in any one of claims 5 to 8, wherein the electrical machine is provided for a driving vehicle.
10. The electrical machine as claimed in claim 9, wherein the driving machine is a submarine.
11. A vehicle having an electrical machine as claimed in one of claims 5 to 10.
12. The vehicle according to claim 11, wherein the driving vehicle is a submarine.
AU2017275457A 2016-06-01 2017-05-18 Method for operating an electrical machine Active AU2017275457B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102016209606.0 2016-06-01
DE102016209606.0A DE102016209606A1 (en) 2016-06-01 2016-06-01 Method for operating an electrical machine
DE102016209602.8 2016-06-01
DE102016209602.8A DE102016209602A1 (en) 2016-06-01 2016-06-01 Electric machine
PCT/EP2017/061908 WO2017207283A1 (en) 2016-06-01 2017-05-18 Method for operating an electrical machine

Publications (2)

Publication Number Publication Date
AU2017275457A1 AU2017275457A1 (en) 2018-11-22
AU2017275457B2 true AU2017275457B2 (en) 2019-11-14

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AU2017275457A Active AU2017275457B2 (en) 2016-06-01 2017-05-18 Method for operating an electrical machine

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EP (1) EP3437174B1 (en)
KR (1) KR102027436B1 (en)
AU (1) AU2017275457B2 (en)
ES (1) ES2823292T3 (en)
WO (1) WO2017207283A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018201206A1 (en) 2018-01-26 2019-08-01 Siemens Aktiengesellschaft Modular arrangement of an inverter and aircraft with such an arrangement
DE102018006787A1 (en) * 2018-08-28 2020-03-05 Paragon Gmbh & Co. Kgaa Electrical drive device for adjusting movable vehicle body parts, in particular spoilers
EP3761486A1 (en) 2019-07-05 2021-01-06 Siemens Aktiengesellschaft Electric rotating machine with permanent magnets

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010043973A1 (en) * 2010-11-16 2012-05-16 Bayerische Motoren Werke Aktiengesellschaft Method for generating noise by electromotor of motor car such as electric car, involves actuating electromotor with drive signal such that modulation in electromotor oscillations is produced to generate noise

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10301272A1 (en) * 2003-01-15 2004-08-05 Siemens Ag Electric machine for propulsion propulsion of a submarine with a permanent magnet excited synchronous machine
US7113850B2 (en) * 2003-12-03 2006-09-26 The Boeing Company Method and apparatus for active acoustic damping motor control
KR20060131581A (en) * 2005-06-16 2006-12-20 창원대학교 산학협력단 Active filter function added in photovoltaic power generation
JP2008236923A (en) * 2007-03-22 2008-10-02 Meidensha Corp Eddy current reduction method and device of pm motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010043973A1 (en) * 2010-11-16 2012-05-16 Bayerische Motoren Werke Aktiengesellschaft Method for generating noise by electromotor of motor car such as electric car, involves actuating electromotor with drive signal such that modulation in electromotor oscillations is produced to generate noise

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AU2017275457A1 (en) 2018-11-22
EP3437174B1 (en) 2020-07-15
EP3437174A1 (en) 2019-02-06
KR20190012234A (en) 2019-02-08
WO2017207283A1 (en) 2017-12-07
ES2823292T3 (en) 2021-05-06
KR102027436B1 (en) 2019-10-01

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Owner name: SIEMENS ENERGY GLOBAL GMBH & CO. KG

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