EP1812714A1 - Anordnung mit einem l]fter und einer pumpe - Google Patents
Anordnung mit einem l]fter und einer pumpeInfo
- Publication number
- EP1812714A1 EP1812714A1 EP05783017A EP05783017A EP1812714A1 EP 1812714 A1 EP1812714 A1 EP 1812714A1 EP 05783017 A EP05783017 A EP 05783017A EP 05783017 A EP05783017 A EP 05783017A EP 1812714 A1 EP1812714 A1 EP 1812714A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arrangement according
- rotor
- stator
- fan
- fluid pump
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D31/00—Pumping liquids and elastic fluids at the same time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
- F04D25/064—Details of the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
- F04D25/0646—Details of the stator
Definitions
- the invention relates to an arrangement with a fan, a pump, and a drive motor.
- this object is achieved by the subject matter of claim 1.
- This achieves a space-saving arrangement, because the same stator drives both a permanent magnetic outer rotor and a fan through this, as well as a permanent magnetic inner rotor, which in turn drives a pump.
- stator has an additional function because it surrounds the inner rotor in the manner of a split pot.
- a coreless winding means a large air gap, but in the largely homogeneous magnetic field between the outer rotor and inner rotor can produce a very constant torque with suitable energization, resulting in a smooth running of such an arrangement for Episode has.
- the optimal form of the current depends on the type of magnetization of the outer and inner rotor.
- FIG. 1 is an illustration for explaining the arrangement of FIG. 1,
- FIGS. 1 and 2 shows an illustration of an iron-free winding used in FIGS. 1 and 2 in the manner of representation customary in electrical engineering
- FIG. 4 shows a schematic representation of a preferred embodiment of the driver stage for the winding of FIG. 3, FIG.
- FIG. 6 shows a longitudinal section through a first exemplary embodiment of an arrangement according to the invention, viewed along the line VI-VI of FIG. 7, FIG.
- FIG. 8 shows a longitudinal section through a second embodiment of an arrangement according to the invention, as seen along the line VIII-VIII of FIG. 9,
- FIG. 10 is a detail view showing how the outer rotor is married to the stator for the second embodiment.
- Fig. 11 is a detail view showing for the second embodiment, as the inner rotor with the impeller and the lid of the Pump housing before its assembly look like.
- Fig. 1 shows in the schematic representation of an arrangement 20 according to the invention.
- the air gaps which should naturally be very small, are exaggerated for reasons of clarity. This illustration essentially serves to explain the mode of action. Pump and fan are only hinted at.
- the assembly 20 has a motor 21 with a stator 22 which is preferably shown as an ironless winding 23 with a plastic part 24 which surrounds a permanent magnet inner rotor 26 in the manner of a split pot liquid-tight and is separated from it by an inner air gap 28.
- the plastic part 24 forms part of the inner air gap 28, as well as the outer air gap 51 described below, since it is magnetically transparent. If the winding 23 is formed without iron, the entire gap between the inner rotor 26 and the outer rotor 48 magnetically represents a uniform air gap.
- the inner rotor 26 drives a turbomachine 27, in this case an impeller 30.
- FIG. 11 shows at the top a typical impeller, which is formed integrally with an inner rotor.
- the rotor 26 and the impeller 30 are liquid-tightly enclosed on the left side of the plastic part 24 and on the right side of a pump cover 32, as shown in Fig. 11, below, by way of example.
- a seal 34 of any kind is located between the plastic part 24 and the pump cover 32 is located in Fig. 1, a seal 34 of any kind. In practice, the parts 24 and 32 are glued or welded.
- a pump cover 32 in Fig. 1, there is an inlet 34 and an outlet 36 for the fluid to be pumped, e.g. Oil in a motor vehicle, or cooling water, or a fluid in a medical device.
- Rotor 26 and impeller 30 are mounted in the illustration of FIG. 1, left in the plastic part 24 and right in the pump cover 32. Another type of storage is described below.
- the plastic part 24 is attached via radially extending webs 38, of which only one is shown, to an air guide housing 40, within which In operation, turn fan blade 42 to move air through this fan housing. Shown is an axial fan, but in the same way a diagonal fan or a radial fan would be possible.
- the fan blades 42 are attached to a permanent magnetic outer rotor 44, which is shown in longitudinal section and which is mounted on roller bearings 46, 48 on the plastic part 24.
- a magnetic yoke in the form of a soft iron part 46 is fixed, which rotates a magnetic ring 48, which is preferably formed here four-pole, as well as the inner rotor 26th
- a Dämpf ⁇ arrangement 50 On the radially inner side of the magnet ring 48 is a Dämpf ⁇ arrangement 50, e.g. in the form of a short-circuit cage or a thin-walled ring of copper sheet.
- a Dämpf ⁇ arrangement 50 e.g. in the form of a short-circuit cage or a thin-walled ring of copper sheet.
- Such attenuation is useful because usually one of the two rotors controls the rotating field of the winding 23 via Hall sensors, and because the other rotor then normally follows this rotating field as in a synchronous machine, but e.g. When starting any relative movement between the inner rotor 26 and the outer rotor 44 is attenuated. This prevents the rotors 26 and 44 from falling out of step during dynamic processes.
- the damping arrangement 50 is separated from the stator 22 by the outer air gap 51.
- a printed circuit board 52 is provided, on which three Hall sensors 54 are provided in a winding with three phases, of which in Fig. 1 only one is shown, which is controlled in this embodiment of the magnetic ring 48.
- a printed circuit board 56 can be placed on the outside of the housing 40, and the rotor position is then calculated by an algorithm, e.g. an algorithm according to the EP 0 536 113 B1 of the applicant.
- a damping 50 proves to be expedient, and such may possibly also on the inner rotor 26, or on both rotor magnets 26, 48 are provided.
- Fig. 2 shows a highly schematic and not to scale section through the arrangement of Fig. 1
- Fig. 3 shows an example of the structure of a suitable three-phase winding 23.
- the magnetic yoke 46 On the outside in Fig. 2, the magnetic yoke 46 is shown, in which there is the rotor magnet 48 shown four-pole, the four radially magnetized poles are indicated in the usual way with N and S.
- the rotor magnet 48 is separated from the stator 22 by the outer air gap 51, and this in turn is separated from the four-pole inner rotor 26 by the inner air gap 28.
- the stator 22 includes, as shown, twelve evenly distributed conductors 1 to 12, whose connections are shown in Fig. 3.
- the illustrated winding 23 according to FIG. 3 is a four-pole, three-phase, "twelve-notched" winding without step shortening. (If no stator iron is used, there are no grooves in the usual sense.) Of course, the use of soft ferromagnetic material in the stator 22 is not excluded.)
- Fig. 3 shows the three phases U, V and W in a representation as if twelve evenly distributed grooves 1 to 12 were present.
- the phase U has two terminals u1 and u2, the phase V has two terminals vi and v2, and the phase W has two terminals w1 and w2.
- the phase U is shown in black, the phase V dash-dotted and the phase W dashed.
- the phase U goes from the terminal u1 to the groove 1, then to the groove 4, then to the groove 7 and to the groove 10, and from this to the terminal u2.
- phase V goes vi to the groove 3, then to the grooves 6, 9 and 12, and from there to v2.
- phase W goes from w1 to the groove 5, then to the grooves 8, 11 and 2, from there to w2.
- the twelve conductors shown in Figure 2 are numbered 1 to 12 for ease of understanding.
- the angle ⁇ is also indicated.
- the magnet 48 of the outer rotor 52 and the inner magnetic rotor 26 are magnetically coupled together, as shown schematically in FIG. 2 by the four flux lines 60, 62, 64, 66.
- the pump rotor 26 and the fan rotor 52 together form a magnetic flux which is four-pole relative to the air gaps 28 and 51.
- the two rotors 26 and 52 are positioned relative to one another in the position as in the case of a magnetic coupling, which is illustrated in FIG. 2, wherein a substantially homogeneous magnetic flux is formed in the air gaps.
- the winding 23 causes a corresponding torque to the inner rotor 26 and the outer rotor 52.
- the total torque can be derived from the Lorenz equation as
- T_motor kei * h + ke2 * I2 + ke3 * l3 ... (2)
- Fig. 4 shows a circuit for the power supply of the winding 13 with its three phases U, V, W. These are each with their inductive component, for. B. Lu, their resistance component, z. B. Ru and their induced voltage z. B. Uu, how to do that in a computer simulation. (The coupling inductances, which are also taken into account in a simulation, are not shown.) - Shown is a delta connection whose connection points are designated 65, 67 and 69.
- a full bridge circuit 68 To power the winding 13 is a full bridge circuit 68, often referred to as an inverter. This receives its power from a DC voltage source 70, z. B. a vehicle battery or the power supply of a computer.
- the DC voltage source 70 is connected to its negative pole to ground 71. Its positive pole feeds via a diode 72, which protects against false connection, a positive line 74, also called de link.
- a storage capacitor is disposed between the line 74 and ground 71, z. With 4,700 ⁇ F. It supplies the full bridge circuit with reactive power.
- the full-bridge circuit 68 has three upper npn transistors 81, 82, 83 and three lower npn transistors 84, 85, 86, to each of which a freewheeling diode 81 'to 86' is connected in anti-parallel.
- the collectors of the upper transistors 81, 82, 83 are connected to the positive line 74 connected.
- the emitters of the lower transistors 84, 85, 86 are connected to a negative line 78, which is connected via a measuring resistor 80 to ground 71.
- the measuring resistor 80 is part of a (not shown) current limit.
- the emitter of the transistor 81 and the collector of the transistor 84 are connected to the
- the emitter of the transistor 82 and the collector of the transistor 85 are connected to the
- Connection point 67 connected.
- the emitter of the transistor 83 and the collector of the transistor 86 are connected to the
- Connection point 69 connected.
- Fig. 2 shows an angle ⁇ , which has the value 0 in the illustrated position of the rotor poles relative to the stator 22 and increases clockwise upon rotation of the rotors.
- FIG. 5 shows the values s1 to s6 for the different values of a.
- the circuit leaves state 1 and goes to state STAT 2 when a transient state TRANS 1 is reached where ⁇ > 60 ° el.
- the signals s1 to s6 for the various rotation angle ranges are indicated in FIG. It is thus preferred to use normal block commutation, i. the currents are supplied in the form of current blocks in which the amplitude can be changed by means of a PWM control.
- the angle ⁇ can be measured sensorless, cf. the mentioned European Patent 0 536 113 B1 of the Applicant.
- FIGS. 6 and 7 show a first embodiment for a practical realization of an arrangement according to the invention.
- the same or similar parts as in Figs. 1 to 5 are denoted by the same reference numerals, but with a trailing apostrophe, z. 52 instead of 52, and are not usually described again.
- FIG. 6 shows on the left a liquid cooler 90, the inlet of which is designated 92. (The drain is not shown in Fig. 6.)
- This cooler 90 has in the middle a recess 92 into which a bearing portion 94 of the assembly 20 'projects.
- the fan blades 42 ' are configured to either blow air through the radiator 90, that is, from right to left, or to suck air from left to right through the radiator.
- the bearing portion 94 serves to support an outer rotor 44 '.
- the structure of the storage corresponds to that of FIG. 8 and 10 and is therefore described there.
- a shaft 96 is mounted, with which a hub 98 via a Rotor bell 100 is connected.
- This has, where it protrudes into the cooler 90, a smaller diameter, which expands over a portion 102 to a rotor bell 104 of larger diameter, in which a four-pole permanent magnet 106 is arranged, for which the rotor bell 104 serves as a magnetic yoke.
- This permanent magnet 106 has on its radially inner side a copper layer 105 to allow an asynchronous start.
- the rotor bell 104 is encapsulated with a plastic jacket 107, with which the wings 42 'are integrally formed.
- the wings 42 have on their outer side air guide elements 108 which extend in the axial direction and reduce the air flow which flows through the gap 110 between a wing tip and the fan housing 112 from the pressure side of the fan to the suction side. This reduces the fan noise.
- a sealed cavity 114 On the outer circumference of the fan housing 112 is a sealed cavity 114, in which a circuit board 116 is arranged, which serves to control the motor.
- an ironless stator winding 118 Radially inside the outer rotor 106 is an ironless stator winding 118, which is preferably designed as a three-phase winding for generating a rotating field, as described in FIG. This winding is supplied from the circuit board 116 with a three-phase current.
- the circuit board 116 may be e.g. be connected to a source of three-phase power or DC power.
- the stator winding 118 is located on the outside of a containment shell 120 provided with guide protrusions 122 for this purpose. These projections 122 serve to secure the winding 118 in the desired angular position on the split pot 120.
- the containment shell 120 is implemented as a magnetically transparent part, preferably made of plastic.
- a standing shaft 126 is fixed in an axial projection 124, the right end of which is guided in FIG. 6 in an axial projection 128 of a pump cover 130 which is provided with an inlet connection piece 132.
- coolant flows through the connection 132 to a centrifugal pump 134.
- the split pot 120 expands on its right in Fig. 6 side over a radially extending portion 135 to a hollow cylindrical portion 136 of larger diameter, in which an impeller 138 rotates during operation.
- This section 146 is connected to the fan housing 112 by three webs or spokes 137. These webs 137 extend transversely to an annular air passage 139.
- This impeller 138 has a protruding left extension 140 of magnetizable material, eg. B. plastic with embedded Hartferriten, and this extension 140 is here four-pole magnetized (like the magnetic ring 106) and is located radially within the ironless winding 118, from which it is liquid-tight separated by the containment shell 120.
- the extension 140 is provided on its inside with two sintered bearings 142, 144, by means of which it is rotatably mounted on the shaft 126.
- the axial extensions 124 and 128 form thrust bearings for the extension 140 and the impeller 138 integral therewith.
- an outlet nozzle 146 extends approximately tangentially outwards. The direction of flow is indicated by an arrow 148.
- stator winding 118 is energized by circuit board 116 to generate a rotating electromagnetic field. As described in detail in FIG. 2, this rotary field drives both the outer rotor magnet 106 and the inner rotor magnet 140. Any relative movement of the rotor magnets 106, 140 is damped by the copper layer 105.
- Fig. 8 shows a second embodiment of the invention. Like or similar parts will be denoted by the same reference numerals as in the preceding figures and will not be described again.
- the bearing section 94 has a bearing tube 148, which is formed integrally with the containment shell 120 and has a cylindrical inner recess 150, cf. Fig. 10.
- Fig. 10 shows in its upper part the corresponding bearing arrangement.
- This has two rolling bearings 154, 156 whose inner rings on the shaft 96 are axially displaceable. Between the outer rings of the bearings 154, 156 is a spacer member 158, which is also axially displaceable on the shaft 96 and has a slightly smaller diameter than the cylindrical inner recess 150th
- a hub 98 is attached to which a rotor bell 100 'is attached.
- This has here a continuous circular cylindrical portion 104 '(with a constant diameter), whose lower part in FIG. 10 serves as a magnetic yoke for the rotor magnet 106 of the outer motor.
- the fan blades 42 "are fastened in the manner shown, which have the same shape as the wings 42' in Fig. 6.
- the hub 98 has a recess 160 at its lower side in FIG. 10, and between this and the inner ring of the upper roller bearing 154 a compression spring 162 is arranged.
- the recess 160 is limited in Fig. 10 to the outside by a downwardly projecting edge 164 which rests against the outer ring of the upper roller bearing 154 in the compressed spring 162.
- a snap ring 166 is fixed, and the inner ring of the lower roller bearing 156 is pressed by the spring 162 against this snap ring 166.
- the bearing assembly 94 is pressed in the direction of arrow 168 in the recess 150 of the bearing tube 148.
- the spring 162 is compressed, so that the edge 164 presses against the outer ring of the upper roller bearing 154, and this outer ring presses via the spacer 158 against the outer ring of the lower bearing 156, so that the entire bearing assembly 94 so far pressed into the bearing tube 148 is applied until the outer ring of the lower roller bearing 156 against a shoulder 170 (Fig. 10) of the inner recess 150 is applied.
- the bearing tube 148 has a cylindrical outer side 174, and on this two printed circuit boards 176, 178 are attached, which carry the electronic components for the control of the currents in the ironless winding 118.
- Hall sensors are arranged, which detect the position of the inner rotor 140 and serve to control the commutation of the ironless winding 118.
- these currents are thus controlled by the location of the inner rotor 140, it also determines the speed of the outer rotor 106, but at start-up, the outer rotor 106 may have some slip against the rotating field generated by the winding 118. For this reason, as already described, the copper layer 105 is provided.
- FIG. 11 shows below the pump cover 130 with its inlet nozzle 132 and the (provided with radial holes) part 128, in which the lower end in Fig. 10 of the shaft 126 is supported. Further, FIG. 11 shows the centrifugal impeller 138 and the inner rotor 140 with the two sintered bearings 142, 144 rotating on the fixed shaft 126 as described in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Walking Sticks, Umbrellas, And Fans (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004018458 | 2004-11-19 | ||
PCT/EP2005/009543 WO2006056249A1 (de) | 2004-11-19 | 2005-09-06 | Anordnung mit einem lüfter und einer pumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1812714A1 true EP1812714A1 (de) | 2007-08-01 |
EP1812714B1 EP1812714B1 (de) | 2008-03-26 |
Family
ID=35106631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05783017A Not-in-force EP1812714B1 (de) | 2004-11-19 | 2005-09-06 | Anordnung mit einem luefter und einer pumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090074594A1 (de) |
EP (1) | EP1812714B1 (de) |
AT (1) | ATE390562T1 (de) |
DE (1) | DE502005003509D1 (de) |
WO (1) | WO2006056249A1 (de) |
Families Citing this family (9)
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ITMC20100002A1 (it) * | 2010-01-11 | 2011-07-12 | Umbra Meccanotecnica | Dispositivo di raffreddamento per motori endotermici che integra le funzioni di ventilatore e pompa di ricircolo del fluido refrigerante. |
CN107454922B (zh) | 2015-04-10 | 2020-11-03 | 开利公司 | 集成风扇换热器 |
US9956050B2 (en) | 2016-08-16 | 2018-05-01 | Ethicon Endo-Surgery, Llc | Methods, systems, and devices for controlling a motor of a robotic surgical system |
US9968412B2 (en) | 2016-08-16 | 2018-05-15 | Ethicon Endo-Surgery, Llc | Methods, systems, and devices for controlling a motor of a robotic surgical system |
US10016246B2 (en) | 2016-08-16 | 2018-07-10 | Ethicon Llc | Methods, systems, and devices for controlling a motor of a robotic surgical system |
CN207499962U (zh) * | 2017-09-29 | 2018-06-15 | 苏州驿力机车科技股份有限公司 | 冷却组件和车辆智能冷却系统 |
DE102022003688A1 (de) * | 2022-10-05 | 2024-01-11 | Mercedes-Benz Group AG | Pumpe, insbesondere für ein Kraftfahrzeug |
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- 2005-09-06 EP EP05783017A patent/EP1812714B1/de not_active Not-in-force
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- 2005-09-06 US US11/719,852 patent/US20090074594A1/en not_active Abandoned
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See references of WO2006056249A1 * |
Also Published As
Publication number | Publication date |
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DE502005003509D1 (de) | 2008-05-08 |
US20090074594A1 (en) | 2009-03-19 |
ATE390562T1 (de) | 2008-04-15 |
WO2006056249A1 (de) | 2006-06-01 |
EP1812714B1 (de) | 2008-03-26 |
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