WO2007072561A1 - 偏平型ブラシレスモーターポンプ及び該偏平型ブラシレスモーターポンプを用いた車両用電動ウオーターポンプユニット - Google Patents
偏平型ブラシレスモーターポンプ及び該偏平型ブラシレスモーターポンプを用いた車両用電動ウオーターポンプユニット Download PDFInfo
- Publication number
- WO2007072561A1 WO2007072561A1 PCT/JP2005/023611 JP2005023611W WO2007072561A1 WO 2007072561 A1 WO2007072561 A1 WO 2007072561A1 JP 2005023611 W JP2005023611 W JP 2005023611W WO 2007072561 A1 WO2007072561 A1 WO 2007072561A1
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- WO
- WIPO (PCT)
- Prior art keywords
- brushless motor
- pump
- rotating shaft
- flat
- core
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0666—Units comprising pumps and their driving means the pump being electrically driven the motor being of the plane gap type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
- F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
- F04D29/0473—Bearings hydrostatic; hydrodynamic for radial pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Definitions
- the present invention relates to a flat brushless motor pump suitable for use in a fluid pump, particularly a liquid cooling device such as a vehicle internal combustion engine radiator, and an electric water pump unit for a vehicle using the flat brushless motor pump. is there.
- a conventional motor pump for example, there is one disclosed in JP-A-5-10286.
- a rotor fitted with a magnet around a common axis with a blade (pump impeller) is arranged in a casing made of a non-magnetic material as a pump housing.
- a stator having armature windings around the rotor magnet is disposed at a position facing the rotor with the casing interposed therebetween. In this way, the rotor part can be Equipped in the ging, the number of parts interposed between the motor and the pump is reduced to improve the sealing performance.
- Patent Document 1 JP-A-5-10286
- a conductive part such as a stator is liquid-tightly surrounded by a can (CAN) made of a non-magnetic material like a canned motor pump (CANNED MOTOR PUMP) pump. ) Increases the number of parts, and heat generating parts such as armature coils and switching elements cannot be cooled sufficiently.
- CAN can
- CANNED MOTOR PUMP canned motor pump
- the present invention has been made in view of the above problems of the prior art, and a flat brushless motor pump that can solve the above problems of the prior art and an electric water vehicle for vehicles using the flat brushless motor pump.
- the purpose is to provide a pump unit.
- Means for solving the problem In order to solve the above problems, the present invention is configured as follows.
- a flat brushless motor pump includes a flat brushless motor; an impeller coupled to a rotation shaft of the flat brushless motor; and the flat brushless motor and the impeller.
- a pump casing having a suction port for sucking fluid and a discharge port for discharging fluid; a motor cover that forms a part of the pump casing and holds a bearing of the flat brushless motor that rotatably supports the rotating shaft
- a flat brushless motor pump that sucks fluid from the suction port and discharges it from the discharge port by rotating a rotating shaft of the motor, wherein the flat brushless motor includes:
- a stator part formed by winding a core in which a plurality of armature coils are wound and a terminal electrically connected to the armature coil, and molding the core and the terminal in a water-tight manner with resin.
- a flat brushless motor pump includes a flat brushless motor; an impeller coupled to a rotation shaft of the flat brushless motor; and the flat brushless motor and the impeller.
- a pump casing having a suction port for sucking fluid and a discharge port for discharging fluid; a motor cover that forms a part of the pump casing and holds a bearing of the flat brushless motor that rotatably supports the rotating shaft
- a flat type brushless motor pump that sucks fluid from the suction port by rotating a rotating shaft of the motor and discharges the fluid, and the flat type brushless motor includes:
- a core having a plurality of armature coils wound thereon, a control board that feeds power to the armature coils to drive and control the motor, and a terminal that is electrically connected to the control board.
- a stator portion formed by water-tightly molding the core, the control board, and the terminal with resin;
- a magnet disposed opposite to the core via a gap, and a magnet fixed to the rotating shaft.
- the bearing is an underwater bearing that slides the rotating shaft with a water film.
- a plurality of grooves serving as fluid flow paths are provided on the outer periphery of the bearing along the axial direction of the rotary shaft, and flow from the suction port.
- the fluid entered enters the hole after passing through the plurality of grooves and then returns to the suction port side.
- the core is formed by integrally molding a composite soft magnetic material.
- the impeller is formed of resin and molded integrally with the yoke over the flat brushless motor pump of the above (1) to (6).
- An electric water pump for a vehicle constituting a liquid cooling unit for circulating cooling water between an engine of the vehicle and a heat exchanger, and the electric water pump for a vehicle is a flat brushless A motor; and an impeller coupled to a rotation shaft of the flat brushless motor; a pump having the flat brushless motor and the impeller, and an intake port for sucking fluid and a discharge port for discharging the fluid A casing; and a motor cover that constitutes a part of the pump casing and holds the bearing of the flat brushless motor that rotatably supports the rotating shaft, and rotates the rotating shaft of the motor to allow fluid to flow.
- An electric water pump for a vehicle that inhales the suction port force and discharges the discharge port force,
- the flat brushless motor is
- a stator part formed by winding a core in which a plurality of armature coils are wound and a terminal electrically connected to the armature coil, and molding the core and the terminal in a water-tight manner with resin.
- the stator that requires water tightness is molded with resin, and the bearing is configured with an underwater bearing, so the motor has a simple configuration. Since the heat generating part such as the armature coil can be cooled sufficiently, the motor characteristics can be improved, and the seal part, especially the bearing part seal part when configured as a motor pump, is greatly improved. In addition to reducing the friction coefficient between the bearing and the rotating shaft, the bearing life is extended. In addition, since the flat brushless motor is composed of a cored type (iron core) armature, the torque characteristics are comparable to that of a general cylindrical cored motor.
- the axial dimension significantly, it can be configured as a flat type that is approximately the diameter of the pipe of the radiator, and of course, the mounting performance can be greatly improved, and the pump suction loca discharge port can be smoothly turned. It begins to flow.
- the rotating shaft is short, the contact area of the fluid is small, the resistance of water is small, and the power consumption can be reduced compared to a cylindrical motor.
- the hole that penetrates in the axial direction is provided in the rotating shaft, and the fluid that flows in from the suction port of the pump passes between the rotor and the stator. Then, after passing through the inner periphery of the bearing, it flows into the hole and flows back to the suction port side of the pump, so that the friction coefficient of the sliding surface between the bearing and the rotating shaft can be reduced.
- fluid is provided on the outer periphery of the bearing. Since there are multiple grooves that serve as the flow path, fluid circulation can be formed from the pump inlet to the outer periphery of the rotor (rotor) ⁇ the gap between the stator and rotor ⁇ the outer periphery of the bearing ⁇ the through hole.
- the pump performance can be improved without the risk of fluid retention.
- the core formed by integrally molding the composite soft magnetic material since the core formed by integrally molding the composite soft magnetic material is used, the core can be reduced in weight as compared with the laminated steel sheet.
- the degree of freedom of design is improved by the shape, and in particular the manufacturability of the core shape like a flat motor is improved.
- This composite soft magnetic material has a sintered core (powder magnetic core) that is made by mixing a soft magnetic iron powder with insulation coating, a binder, compacting, sintering, and eddy current loss is small.
- the flat motor can greatly improve the tonoleque characteristics, so that the motor characteristics comparable to the cylindrical core motor can be obtained.
- the iron loss is small in the high frequency range, so it is also effective for harmonic countermeasures such as PWM control.
- the ring-shaped assembly made of the composite soft magnetic material is disposed on the magnetic pole surface of the core, so that the magnetic gap in the circumferential direction is satisfied.
- Torque ripple reduces cogging torque, and the particles are three-dimensionally insulated, so the magnetic path between the armature coil and magnet is smoothly formed regardless of the direction of magnetic flux, improving the magnetic force. To do.
- the impeller is molded integrally with the mouth yoke with resin, the manufacturability can be improved and the weight can be reduced. Further, since the molding is performed integrally without leaving any gap in the axial direction, the height of the impeller can be configured to be substantially the same as that of the rotating shaft, thereby contributing to flattening.
- the flat brushless motor pump described in any one of the above (1) to (8) is used as a water pump unit for an internal combustion engine for a vehicle. Since it is installed, it can be integrated with the heat exchanger to perform piping work. In addition to simplification, it can save space in the engine room and increase design freedom. In addition, by placing it instead of a mechanical pump directly connected to the engine (power pump driven by a belt driven by the engine), the unnecessary flow rate can be reduced and the optimum flow rate can be secured, improving fuel efficiency by 2-3%. I can plan.
- FIG. 1 is a partially broken sectional view showing a side surface and a partial internal structure of an embodiment of a brushless motor pump of the present invention
- FIG. 2A is an external perspective view thereof
- FIG. 2B is an equivalent circuit diagram thereof. It is.
- Reference numeral 10 in FIG. 1 is a casing (housing) of the brushless motor pump 1, and 12 and 14 are a fluid inlet and a fluid outlet provided in the casing 10, respectively.
- Impeller (fan) 16 By rotating the, the fluid is sucked from the suction port 12, and the fluid is turned (flowed) to the discharge port 14 and discharged from the discharge port 14.
- the impeller 16 is formed by radially arranging a plurality of blades 18 on a hub 20, fixed to a rotor (rotor) yoke 22 of the motor, and rotates integrally with the rotor yoke 22.
- the impeller 16 is formed of a metal or a long life coolant (ethylene glycol) resin or the like. When the impeller 16 is made of metal, it is fixed to the rotor yoke 22 by welding or the like. When the impeller 16 is made of resin, the impeller 16 is formed integrally with the yoke 22 as described later.
- Reference numeral 24 denotes a plurality of magnets (permanent magnets) each having a sector shape or an annular shape and having magnetic poles, and are fixed to the yoke 22 with an adhesive or the like.
- Reference numeral 30 indicates that the magnet 24 faces the magnet 24 in the axial direction of the rotary shaft 26 with a gap. It is a core arranged in. As shown in FIG. 7A, in the core 30, a plurality of substantially fan-shaped core portions 32 are formed on a disc-shaped core base portion 34 so as to protrude concentrically with the rotating shaft 26 at equal intervals in the circumferential direction. ing. Further, a coil 40 as an armature is wound around each core portion 32 via an insulating member 36 (see FIG. 8). Here, the number of core portions 32 is nine, for example.
- the core 30 is formed of a sintered core (powder magnetic core) that is formed by heat-molding a composite soft magnetic material consisting of a high magnetic permeability silicon steel plate or pure iron powder and a binder, as shown in Fig. 7A.
- a sintered core pellet magnetic core
- a composite soft magnetic material consisting of a high magnetic permeability silicon steel plate or pure iron powder and a binder, as shown in Fig. 7A.
- a plurality of substantially fan-shaped core portions 32 are provided on the disk-shaped core base portion 34, and protrusions 38 are provided above the core portions 32.
- the composite soft magnetic material for example, MBS (Mitsubishi Materials Bonded Soft Magnetic Material) manufactured by Mitsubishi Materials is used.
- a composite soft magnetic material is a compacted body of iron powder that has been subjected to an electrical insulation film treatment, and has a specific resistance 1000 times that of a metal material that has a higher magnetic flux density than conventional iron powder core materials. Have.
- a sintered core that can be integrally formed in one shot is useful.
- This sintered core can be made lighter than laminated materials, and is formed by applying an electrical insulation coating to iron powder (pure iron powder) with an average particle size of about 80 ⁇ m to 100 ⁇ m. Therefore, it is possible to improve the magnetic characteristics with extremely small eddy current loss.
- the eddy current loss in the high frequency range is superior to that of silicon steel sheet (see Fig. 7B), and it has an advantageous effect on harmonic countermeasures during PWM control.
- a ring-shaped appendix 42 made of the same material as the core 30 is provided so as to cross over the armature coil 40 disposed in the circumferential direction on the magnetic pole surface of the core portion 32. It is.
- the assemblies 42 are provided concentrically with the rotating shaft 26, and a plurality of fitting holes 44 are arranged in the circumferential direction corresponding to the protrusions 38 of the core 32.
- the fitting holes 44 are provided so as to be fitted into the corresponding protrusions 38 of the core part 32.
- the apparel 42 may be omitted if the necessary motor output characteristics can be ensured, but the circumferential magnetic path is continuously formed in a ring shape so that the magnetic Since the gap is filled, it has the effect of suppressing torque ripple and cogging torque.
- the assembly 42 is made of a composite soft magnetic material that is the same material as the core 30, workability is facilitated.
- the composite soft magnetic material is an aggregate of iron powder that has been subjected to an electrical insulating film treatment, Is magnetically isotropic (see Figure 7C). Therefore, since the composite soft magnetic material does not matter the direction of magnetic flux, free magnetic circuit design is possible, and a smooth magnetic path can be formed between the armature coil 40 and the magnet 24, thereby improving the magnetic force. Since the laminated material has a two-dimensional insulating property (see Fig. 7D), it is necessary to design a magnetic circuit along the insulating film.
- the terminal 52 of the armature coil 40 is sequentially connected according to the position of the magnet so that the power supply sequence can be switched, and the terminal 52 constituting the connector 50 is disposed.
- a substrate 54 is provided.
- the motor 1 constitutes a so-called three-phase position sensorless brushless motor, and three terminals 52 are provided, and these terminals 52 are electrically connected to three power supply lines 56, and the power supply lines Power is supplied by 56.
- the stator part 3 having the core 30 in which the armature coil 40 is wound and the assembly 42 is disposed, the substrate 54, and the terminal 52 is integrally molded with a mold resin 37 made of, for example, polyester resin.
- a mold resin 37 made of, for example, polyester resin.
- FIG. 3 is a bottom view of the pump 1 and shows a state where the motor cover 70 is removed.
- FIG. 4 is a perspective view showing a bearing 62 that rotatably supports the rotor 2, and arrows in the figure indicate the flow of fluid.
- the bearings 62 are arranged as follows. That is, the outer peripheral portion 66 of the bearing 62 is fitted into the central cavity portion 38 of the mold resin 37, the rotary shaft 26 is fitted to the inner peripheral portion of the bearing 62, and both ends of the rotary shaft 26 are E-rings (retaining rings) 68.
- This bearing 62 is a non-water-filled water bearing (underwater bearing) that can be used underwater, and is made of carbon fiber or the like.
- the bearing 62 has a rotation shaft hole 69 along the axial direction of the rotation shaft at the center thereof, and a plurality of bearings along the axial direction of the rotation shaft at the outer peripheral portion.
- a groove 74 and end surface groove portions 75 and 75 connected to the groove 74 are provided at both corners in the axial direction of each groove 74, and these form a fluid flow path.
- Fig. 15 is a cross-sectional view of the rotor and bearing, and arrows indicate the flow paths.
- the fluid (for example, water) flowing in from the impeller 16 side passes through the gap between the stator 3 and the magnet 24 from the outer periphery of the yoke 22 as shown by the arrows in FIGS.
- the bearing 62 through the upper E-ring 68 Flows downward through the clearance between the inner periphery and the rotating shaft 26 (sliding surface between the bearing and the rotating shaft) 76, flows into the through hole 64 of the rotating shaft 26, rises, and forms a flow path that returns to the impeller 16 side. .
- the other flow path passes through the gap between the stator 22 and the magnet 24 from the outer periphery of the yoke 22, passes through the groove 74 from the upper end surface groove 75, and passes through the groove 74 of the motor cover 70 through the lower end surface groove 75.
- a flow path that flows inside the convex portion 70a, flows into the through hole 64 of the rotating shaft 26, rises, and returns to the impeller 16 side is formed.
- the flow of such fluid is indicated by arrows.
- the rotating shaft 26 is slid by the water film, and the fluid constantly circulates. Therefore, there is no possibility that the fluid stays near the inner wall surface of the motor cover 70, and the pump efficiency can be improved. Since it is not necessary to liquid-tightly seal the part, the configuration is simplified. In addition, since the axial size of the rotor portion composed of the yoke and magnet is short, the resistance of water with the rotating body is reduced, power consumption can be reduced, and the motor pump can be further downsized. In addition, since the bearing and the rotating shaft slide well due to the water film in the gap 76 between them, the life as a bearing having a very small coefficient of friction can be greatly improved.
- the impeller 16 is made of a heat resistant long-life coolant resin (resin that can withstand long life coolant such as ethylene glycol), and the impeller 16 is integrally formed on the yoke 22 by the mold resin 39. Thereafter, the magnet 24 is attached to the lower surface of the yoke 22.
- the upper surface of the yoke 22 is provided with irregularities so that the resin can be easily adhered. Since a single-cooled impeller can be configured in this way, the configuration is simple and the axial dimension can be reduced.
- FIG. 6 is a cross-sectional view showing another configuration example of the rotor.
- the impeller 16 is similarly made of a long-life coolant resin having heat resistance, and after attaching the magnet 24 to the lower surface of the yoke 22, the contact portion between the rotating shaft 26 and the yoke 22 is excluded.
- the impeller 16, the yoke 22, and the magnet 24 are integrally molded with the resin 39. That is, the resin 39 is formed by integrally molding not only the upper surface of the yoke 22 but also the lower surface and side surface of the magnet 24 from the side surface.
- the magnet 24 may be detached or damaged due to vibration during operation. Therefore, scattering of the magnet 24 can be prevented.
- the stator side of the brushless motor pump configured as described above is connected to the outer periphery of the casing 10 and the motor cover 70 via a single O-ring 80 as a seal member.
- the brushless motor single pump of the present invention is completed by covering the plate-shaped motor cover 70. Since the motor parts 2 and 3 are housed in the pump casing (nozzle) 10, they can be extremely miniaturized and the mounting property on the vehicle is greatly improved. Furthermore, since the stator, the rotor and the bearing are constructed so that they can be immersed, it is possible to simplify the watertight configuration by using a single O-ring 80 to ensure watertightness.
- the fluid can be smoothly turned from the suction port to the discharge port, and the pump efficiency is excellent.
- FIG. 9 is a diagram showing a motor performance curve as the motor pump of the present invention.
- an output of 100 W or more can be secured in the target effective torque range, so the amount of cooling water required by a general vehicle (for example, an engine with a displacement of up to 2500 cc) is 80 to 110 L / min Make it possible enough.
- the above shows a basic configuration example of the brushless motor pump of the present invention.
- the control board constituting the motor drive circuit is arranged outside the motor pump, for example, on the vehicle control unit (ECU unit) side. This is an example in which operation is possible by mounting. Therefore, in this case, the board 54 functions as a board for wiring the lead wire connected to the armature coil 40 via an induced voltage detection circuit described later.
- Figure 2B shows the equivalent circuit in the motor pump in this case.
- the motor control unit can be installed on the board inside the motor.
- FIG. 10 is a partially broken sectional view showing a side surface of another embodiment of such a brushless motor pump and a partial internal structure thereof
- FIG. 13 is a circuit block diagram of a motor control unit and the like.
- components having the same functions as those in FIGS. 1 to 9 are denoted by the same reference numerals, and redundant description thereof is omitted.
- the end of the armature coil 40 of each phase is connected to the substrate 55 via a known induced voltage detection circuit 94 that includes an induced voltage detection element 95 and the like and detects the phase.
- the induced voltage detection element is an example.
- three sets of voltage dividing circuit means comprising two resistors 95 connected in series are configured.
- the board 55 is equipped with electronic components 90 such as a switching element 92 to constitute a control board.
- electronic components 90 such as a switching element 92 to constitute a control board.
- a magnetic pole position detection circuit 96, an output circuit 91 including a plurality of switching elements 92, a control circuit 98, and a logic circuit 97 are mounted on the substrate 55.
- the control board 55, the core 30, and the terminal 52 are integrally molded with resin to form the stator portion 3.
- the ECU 100 and the control board 55 are connected by four lead wires 102, which are two motor power supply wires 102c and 102d, and two signal wires, for example, Signal lines 102a and 102b for transmitting and receiving control signals of the ECU 100 such as a vehicle.
- the two signal lines are, for example, a signal line 102a for transmitting a command signal from the ECU 100, and a signal line 102b for the ECU 100 to receive a drive signal for the motor unit according to the command signal.
- the operation of the flat brushless motor pump configured as described above will be described with reference to FIGS. 12 to 13 and the like with respect to an example in which the motor control board 55 is built in the motor pump.
- the rotor is described as having 6 poles and the stator magnetic pole (core) is configured as 9 poles, but the present invention is not limited to this.
- the energization pattern is specified for convenience in description, and is not particularly limited.
- ECU 100 driven by battery 150 transmits a pump drive command via signal line 102a.
- the control circuit 98 with a built-in motor receives the pump drive command via the connectors 50 and 50 and the terminal 52, and outputs a start signal to the output circuit 91 based on the pump drive command. Start on / off control.
- the control circuit 98 outputs a start energization timing signal, and in this embodiment, energizes the V-W coil.
- V1_W1, V2-W2, V3-W3 and the three coils of each phase are excited simultaneously, and magnetic flux as schematically shown in Fig. 12 is generated.
- the direction of the directional current is indicated by a dot ⁇ ⁇ ) in the circle from the back of the page to the front, and the direction of the directional current is also crossed in the circle (X
- the VI coil is excited to generate a magnetic force flowing from the nearest magnet N1
- the W1 coil is excited to generate a magnetic force flowing to the magnet S2.
- the V2 coil is excited to generate a magnetic force flowing from the nearest magnet ⁇ 2
- the W2 coil is excited to generate a magnetic force S that flows to the magnet S3.
- the magnetic force is also generated in the V3-W3 coil, and a force in a certain direction acts on the rotor in the left direction on the paper.
- the rotor is gradually accelerated by energizing the V-U coil. To do.
- the rotor rotates in a certain direction.
- the Appearance 42 generates a magnetic path in the circumferential direction and fills the magnetic gap between the poles. Therefore, the cogging torque and torque ripple are alleviated to improve the magnetic characteristics.
- both the core 30 and the assembly 42 are made of a composite soft magnetic material with a three-dimensional insulating coating, the magnetic flux can easily flow in the three-dimensional direction and the magnetic characteristics are improved.
- the magnetic pole position detection circuit 96 generates an interphase detection voltage corresponding to the difference between the induced voltages of the phases detected by the induced voltage detection circuit 94, and detects a zero cross point of the interphase detection voltage.
- a magnetic pole position detection signal with a pulse width of 180 ° shifted by 120 ° is output to the logic circuit 97.
- the logic circuit 97 generates an energization timing signal of, for example, a 120 ° width for controlling on / off of each of the six switching elements 92, and Based on the energization timing signal, the control circuit 98 performs on / off control of each switching element 92 of the output circuit 91.
- the impeller 16 rotated in this manner, the fluid sucked from the suction port 12 of the pump casing is discharged to the discharge port 14. After the impeller 16 reaches a predetermined rotation speed, the motor pump 1 is operated according to the liquid temperature and control time, and the flow rate is adjusted appropriately.
- a brushless motor pump configured as described above to a heat exchanger (radiator) portion of a vehicle internal combustion engine to circulate cooling water between the engine of the vehicle and the heat exchanger.
- the brushless motor pump can be directly connected to the radiator 130 as shown in FIG.
- FIGS. 14A and 14B schematically showing the flow path of the cooling water in the engine.
- the power pump 110 functions by engine operation. That is, after starting, until the cooling water temperature reaches the monitoring temperature (predetermined temperature) of the thermostatic control valve 112, the cooling water passes through the passage 114, the power pump 110, and the engine internal passage 116. Cycle through block 11-8.
- the thermostat type control valve 112 is actuated, and the cooling water is supplied to the radiator 132 by the fan 132 via the upper hose 120.
- a liquid cooling unit is constituted by the pumps 1 and 110, the passages 114 and 116, the hoses 120 and 122, the valve 112, the radiator unit 130, and the like.
- the thermostatic control valve 112 functions to secure a flow path to the upper hose 120,
- the control unit C (ECU100) of the vehicle commands the operation of the motor pump 1, and after cooling water flows out of the engine block 118 and is cooled by the fan 132 in the radiator 130, the motor pump 1, the power pump 110, and the engine Return to block 118.
- the impeller of the power pump 110 is idle (idling). In this way, the liquid temperature can be controlled.
- the temperature sensor 134 detects the engine internal water temperature during traveling, and the control unit C (ECU 100) of the vehicle reads the signal to determine whether the liquid temperature is high. If the liquid temperature is high, the ECU 100 transmits a pump operation command to the motor pump 1. Cooling water is cooled by the fan 132 by the radiator 130 from the engine block 118 via the upper hose 120 by the pump operation, and then returned to the flow path leading to the motor pump 1, the lower hose 122, and the engine internal flow path 116. To do.
- Controller C commands the motor pump 1 to be turned on and off according to the liquid temperature detected by the temperature sensor 134.
- the power supply rate to the motor is suppressed to, for example, about 50%, and then the power supply rate is gradually increased. It is okay to command the energization rate to be%.
- a force radial gap type brushless motor described as an example of an axial gap type motor that is, a so-called axial gap type brushless motor may be used.
- the position sensor is provided on the control board in the force motor described on the assumption that the position sensorless motor of the rotor is used. good. In this case, if the control board is built into the motor, the position sensor leads need not be led out of the motor and can be processed inside the motor. ,.
- the fluid pump is not limited to a radiator (heat exchanger), but may be used for other fluid pumps.
- the present invention relates to a flat brushless motor pump suitable for use in a fluid pump, particularly a liquid cooling device such as a radiator for an internal combustion engine of a vehicle, and an electric water pump unit for a vehicle using the flat brushless motor pump. While adopting a thin motor that eliminates the need to seal the bearing elements in a water-tight manner, the motor characteristics are improved to ensure the pumping capacity, enabling mounting in a radiator, etc. in a small space, and cooling system piping as a unit Can be simplified.
- FIG. 1 is a partially broken sectional view showing a side surface of a brushless motor pump according to an embodiment of the present invention and a partial internal structure thereof.
- FIG. 2A is an external perspective view of an embodiment of a brushless motor pump of the present invention.
- FIG. 2B is an equivalent circuit diagram of an embodiment of the brushless motor pump of the present invention.
- FIG. 3 is a bottom view of an embodiment of a brushless motor pump according to the present invention, showing a state where a motor cover is removed.
- FIG. 4 is a perspective view showing a bearing of a rotor.
- FIG. 5 is a cross-sectional view showing a configuration example of a rotor.
- FIG. 6 is a cross-sectional view showing another configuration example of the rotor.
- FIG. 7A is an external perspective view of a stator core.
- FIG. 7B is a characteristic diagram showing eddy current loss of a sintered core.
- FIG. 7C is a diagram for explaining the magnetic characteristics of the composite soft magnetic material forming the core.
- FIG. 7D is a diagram for explaining the magnetic characteristics of the laminated steel sheet forming the core.
- FIG. 8 is an external perspective view showing a part of a stator core and an upper die.
- FIG. 9 is a diagram showing a motor performance curve of an embodiment of the brushless motor pump of the present invention. is there.
- FIG. 10 is a partially broken sectional view showing a side surface and a partial internal structure of another embodiment of the brushless motor pump of the present invention.
- FIG. 11 is an external perspective view showing a state in which the brushless motor pump of the present invention is mounted on a radiator portion of an engine.
- FIG. 12 is a diagram for explaining the control operation of the motor of the brushless motor pump of the present invention.
- FIG. 13 is a circuit block diagram of a motor control unit and the like of the brushless motor pump of the present invention.
- FIG. 14A is a schematic view showing a state in which the brushless motor pump of the present invention is mounted on the radiator portion of the engine, and shows a case where the brushless motor pump according to the present invention is used in combination with a power pump of the engine.
- FIG. 14B is a schematic view showing a state in which the brushless motor pump of the present invention is mounted on the radiator portion of the engine, and shows a case where only the brushless motor pump according to the present invention is used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sliding-Contact Bearings (AREA)
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/577,793 US20080226474A1 (en) | 2005-12-22 | 2005-12-22 | Flattened Brushless Motor Pump and Vehicle Electric Pump Unit Using Flattened Brushless Motor Pump |
JP2007550966A JP4841565B2 (ja) | 2005-12-22 | 2005-12-22 | 偏平型ブラシレスモーターポンプ及び該偏平型ブラシレスモーターポンプを用いた車両用電動ウオーターポンプユニット |
EP05820361.3A EP1972791A4 (en) | 2005-12-22 | 2005-12-22 | FLAT BRUSHLESS MOTOR PUMP AND FLAT BRUSHLESS ENGINE PUMP INSERTING ELECTRIC WATER PUMP UNIT FOR VEHICLE |
CN2005800523520A CN101341340B (zh) | 2005-12-22 | 2005-12-22 | 扁平型无刷电动泵及使用了该电动泵的车辆用电动水泵组 |
PCT/JP2005/023611 WO2007072561A1 (ja) | 2005-12-22 | 2005-12-22 | 偏平型ブラシレスモーターポンプ及び該偏平型ブラシレスモーターポンプを用いた車両用電動ウオーターポンプユニット |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/023611 WO2007072561A1 (ja) | 2005-12-22 | 2005-12-22 | 偏平型ブラシレスモーターポンプ及び該偏平型ブラシレスモーターポンプを用いた車両用電動ウオーターポンプユニット |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007072561A1 true WO2007072561A1 (ja) | 2007-06-28 |
Family
ID=38188352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/023611 WO2007072561A1 (ja) | 2005-12-22 | 2005-12-22 | 偏平型ブラシレスモーターポンプ及び該偏平型ブラシレスモーターポンプを用いた車両用電動ウオーターポンプユニット |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080226474A1 (ja) |
EP (1) | EP1972791A4 (ja) |
JP (1) | JP4841565B2 (ja) |
CN (1) | CN101341340B (ja) |
WO (1) | WO2007072561A1 (ja) |
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JP2013055744A (ja) * | 2011-09-01 | 2013-03-21 | Hitachi Automotive Systems Ltd | 同期電動機の駆動システム及び同期電動機 |
JP2018514733A (ja) * | 2015-05-19 | 2018-06-07 | 立峰 羅 | ハイブリッド動圧スラスト気体軸受 |
JP2018514732A (ja) * | 2015-05-19 | 2018-06-07 | 立峰 羅 | 溝付き動圧ラジアル気体軸受 |
JP2019124356A (ja) * | 2018-01-17 | 2019-07-25 | Ntn株式会社 | 滑り軸受、軸受装置、および画像形成装置 |
WO2020137549A1 (ja) * | 2018-12-27 | 2020-07-02 | 住友電気工業株式会社 | コア、ステータ、及び回転電機 |
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DE102014015586B3 (de) * | 2014-10-21 | 2016-03-31 | Webasto SE | Heizgerät |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013055744A (ja) * | 2011-09-01 | 2013-03-21 | Hitachi Automotive Systems Ltd | 同期電動機の駆動システム及び同期電動機 |
US8878480B2 (en) | 2011-09-01 | 2014-11-04 | Hitachi Automotive Systems, Ltd. | Synchronous motor drive system and synchronous motor |
JP2018514733A (ja) * | 2015-05-19 | 2018-06-07 | 立峰 羅 | ハイブリッド動圧スラスト気体軸受 |
JP2018514732A (ja) * | 2015-05-19 | 2018-06-07 | 立峰 羅 | 溝付き動圧ラジアル気体軸受 |
JP2019124356A (ja) * | 2018-01-17 | 2019-07-25 | Ntn株式会社 | 滑り軸受、軸受装置、および画像形成装置 |
JP7332299B2 (ja) | 2018-01-17 | 2023-08-23 | Ntn株式会社 | 滑り軸受、軸受装置、および画像形成装置 |
WO2020137549A1 (ja) * | 2018-12-27 | 2020-07-02 | 住友電気工業株式会社 | コア、ステータ、及び回転電機 |
JP2020108290A (ja) * | 2018-12-27 | 2020-07-09 | 住友電気工業株式会社 | コア、ステータ、及び回転電機 |
JP7195920B2 (ja) | 2018-12-27 | 2022-12-26 | 住友電気工業株式会社 | コア、ステータ、及び回転電機 |
US11894720B2 (en) | 2018-12-27 | 2024-02-06 | Sumitomo Electric Industries, Ltd. | Core, stator and rotating electrical machine |
Also Published As
Publication number | Publication date |
---|---|
EP1972791A4 (en) | 2016-04-13 |
US20080226474A1 (en) | 2008-09-18 |
JPWO2007072561A1 (ja) | 2009-05-28 |
CN101341340B (zh) | 2011-12-28 |
JP4841565B2 (ja) | 2011-12-21 |
EP1972791A1 (en) | 2008-09-24 |
CN101341340A (zh) | 2009-01-07 |
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