WO2012093678A1 - Electric pump apparatus - Google Patents
Electric pump apparatus Download PDFInfo
- Publication number
- WO2012093678A1 WO2012093678A1 PCT/JP2012/050035 JP2012050035W WO2012093678A1 WO 2012093678 A1 WO2012093678 A1 WO 2012093678A1 JP 2012050035 W JP2012050035 W JP 2012050035W WO 2012093678 A1 WO2012093678 A1 WO 2012093678A1
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- WO
- WIPO (PCT)
- Prior art keywords
- failure
- motor
- electric pump
- pump device
- circuit board
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/008—Prime movers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/007—General arrangements of parts; Frames and supporting elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/51—Bearings for cantilever assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/10—Voltage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/60—Prime mover parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/86—Detection
Definitions
- the present invention relates to an electric pump device mounted on a vehicle.
- the sealing member or the like prevents rainwater from entering the housing.
- rainwater or the like may be immersed in the housing.
- the electric pump device in which the control device is integrated as described above a short circuit occurs in the electric system that electrically connects the power source (battery) and the motor, or rainwater or the like in the electric system adheres. There is a risk that the damaged portion (wiring or the like) may be damaged due to deterioration.
- the control device is usually provided with a failure detection function.
- the control device has a microcomputer for controlling the operation of the motor, and the microcomputer detects a current value and a voltage value supplied to the motor. Then, the microcomputer determines that a failure has occurred when the detected current value or voltage value is an inaccessible value or a discontinuous value, and notifies the driver that the electric pump device has failed. It is like that.
- the present invention has been made to solve the above-described problems, and its object is to avoid failure of the failure detection circuit before detecting failure of the electric system, and to ensure the reliability of failure detection.
- An object of the present invention is to provide an electric pump device capable of increasing the pressure.
- a first aspect of the present invention includes a pump that generates hydraulic pressure, a motor that drives the pump, a control device that controls the operation of the motor, the pump, the motor, and the
- the electric pump device including a housing that houses the control device and has a mounting portion to the vehicle body, the circuit board of the control device has a failure in an electrical system that electrically connects the motor and the power source.
- a failure detection circuit is provided, and the failure detection circuit is arranged on the circuit board so as to be above the lowest water level at which a failure occurs in the electrical system due to water immersion in the housing.
- the failure detection circuit is arranged so as to be on the upper side in the gravity direction from the lowest water level at which a failure occurs in the electrical system. For this reason, when water intrudes into the housing, the fault detection circuit is submerged and cannot be reliably detected (operated). The electrical system will break down.
- the failure detection circuit since the failure detection circuit is arranged on the upper side in the direction of gravity, even if no failure occurs in the electrical system, a part of the electrical system has rainwater before the failure detection circuit. Etc. are likely to adhere. For this reason, before the failure detection circuit can detect the failure, a part of the electric system is deteriorated to cause a failure. Therefore, the failure detection circuit can detect the failure of the electric system more reliably and can improve the certainty of the failure detection.
- the attachment portion may be formed so that the circuit board is orthogonal to the horizontal direction in a state of being attached to the vehicle body.
- the failure detection circuit can be arranged far away from the lowest water level where the short circuit occurs in the electric system to the upper side in the direction of gravity, so that the failure detection circuit is submerged before the short circuit occurs in the electric system. Can be surely prevented.
- the failure detection circuit may be disposed above a range of 1/3 from the lower end in the gravity direction of the circuit board. According to the said structure, it can prevent suitably that a failure detection circuit is submerged before detecting the failure of an electric system.
- the attachment portion can be formed so that the circuit board is in a horizontal direction in a state where it is attached to the vehicle body.
- the failure detection circuit can be arranged on the upper surface of the circuit board so as to be located above the lowest water level in the gravity direction.
- the electric pump device further includes current detection means for detecting a current supplied to the motor, and the failure detection circuit detects a failure of the electric system based on the current detected by the current detection means. Can do. According to the said structure, the failure of an electric system can be detected easily with a simple structure.
- the electric pump device further includes voltage detection means for detecting a voltage applied to the motor, and the failure detection circuit detects a failure of the electric system based on the voltage detected by the voltage detection means. Can do. According to the said structure, the failure of an electric system can be detected easily with a simple structure.
- an electric pump device that can avoid failure of a failure detection circuit before detecting a failure of an electric system and can increase the certainty of failure detection.
- FIG. 3 is a cross-sectional view illustrating a schematic configuration of the electric pump device according to the first embodiment.
- FIG. 2 is a block diagram illustrating an electrical configuration of the electric pump device according to the first embodiment. Sectional drawing which shows schematic structure of the electric pump apparatus of Embodiment 2.
- FIG. 3 is a cross-sectional view illustrating a schematic configuration of the electric pump device according to the first embodiment.
- FIG. 2 is a block diagram illustrating an electrical configuration of the electric pump device according to the first embodiment. Sectional drawing which shows schematic structure of the electric pump apparatus of Embodiment 2.
- FIG. 3 is a cross-sectional view illustrating a schematic configuration of the electric pump device according to the first embodiment.
- FIG. 2 is a block
- Embodiments 1 and 2 in which the present invention is embodied in an electric pump device that is mounted on a vehicle and supplies hydraulic pressure to a transmission or the like will be described below with reference to the drawings.
- the electric pump device 1 includes a housing 2 formed in a substantially cylindrical shape.
- a pump 3 that generates hydraulic pressure
- a motor 4 that drives the pump 3
- a control device 5 that controls the operation of the motor 4 are housed integrally.
- one axial end side (left side in FIG. 1) of the housing 2 is a front side
- the other axial end side (right side in FIG. 1) is a rear side.
- the housing 2 includes a substantially annular pump case 11, a pump plate 12 disposed on the front side of the pump case 11, a cylindrical motor case 13 disposed on the rear side of the pump case 11, and a rear of the motor case 13. And a cover 14 for closing the opening end on the side.
- the pump case 11 and the pump plate 12 are made of a metal material
- the motor case 13 and the cover 14 are made of a resin material.
- the pump case 11, the pump plate 12, and the motor case 13 are connected to each other by bolts 15, and the cover 14 is fixed to the motor case 13 by welding (vibration welding or the like).
- a trochoid pump (internal gear pump) is employed as the pump 3.
- the motor 4 that is the drive source of the pump 3 employs a sensorless type brushless motor that does not have a rotation sensor for detecting the rotational position of the rotor, and the three-phase (U, V, Rotate based on the driving power of W).
- the pump 3 includes an outer gear 21 having teeth on the inner periphery and an inner gear 22 having teeth on the outer periphery.
- the outer gear 21 is rotatably accommodated in an accommodation hole 23 formed in the center of the pump case 11, and the inner gear 22 is disposed on the inner peripheral side of the outer gear 21.
- the pump plate 12 that closes the front end of the accommodation hole 23 is formed with an inlet 24 for sucking hydraulic oil and an outlet (not shown) for discharging hydraulic oil between the outer gear 21 and the inner gear 22. ing.
- O-rings 16 and 17 are interposed between the pump case 11 and the pump plate 12 and between the pump case 11 and the motor case 13, respectively. Since the cover 14 is welded to the motor case 13, the area other than the region where the hydraulic oil is introduced into the housing 2 is sealed in a liquid-tight manner to prevent rainwater and the like from entering from the outside.
- the pump case 11 is formed with a cylindrical support portion 25 having a smaller diameter than the motor case 13 protruding rearward on the same axis as the accommodation hole 23.
- An output shaft 26 of the motor 4 serving as a drive shaft of the pump 3 is inserted into the support portion 25 in a state of projecting into the accommodation hole 23, and is separated by a bearing device 27 provided at the rear portion in the support portion 25.
- the bearing device 27 is composed of two rolling bearings adjacent to each other in the front-rear direction.
- An inner gear 22 is coupled to the front end of the output shaft 26 so as to be integrally rotatable.
- a seal member 28 is provided between the front portion of the pump case 11 relative to the support portion 25 and the output shaft 26 to prevent hydraulic fluid from leaking from the accommodation hole 23 toward the motor case 13. ing.
- the motor 4 includes a rotor 31 having the output shaft 26 and a stator 32 fixed to the inner periphery of the motor case 13.
- the rotor 31 has a rotor core 34 fixed to the rear end of the output shaft 26 and a magnet 35 fixed to the rotor core 34.
- the rotor core 34 extends in the radial direction from the rear end of the output shaft 26, is formed in a bottomed cylindrical shape so as to surround the support portion 25, and is coupled to the rear end of the output shaft 26 so as to be integrally rotatable.
- the magnet 35 is fixed to the outer peripheral surface of the rotor core 34 so as to face the stator 32.
- stator 32 is wound around each tooth portion 38 via an insulator 40 and a stator core 39 including a cylindrical portion 37 formed in an annular shape and a tooth portion 38 projecting radially inward from the cylindrical portion 37. And a three-phase motor coil 41.
- the insulator 40 is formed with a pedestal portion 42 that extends from the rear end of the cylindrical portion 37 and to which the control device 5 is fixed.
- a circuit board (printed board) 51 of the control device 5 includes a power IC chip 52 constituting a drive circuit 71 for supplying drive power to each motor coil 41, and a drive circuit.
- a control IC chip 53 constituting a microcomputer 72 for controlling 71 is mounted.
- the control device 5 is fixed to the rear side of the motor 4 by fastening the circuit board 51 to the pedestal portion 42 of the insulator 40 with a plurality of (six in this embodiment) screws 54a to 54f. .
- connection end portion 55 of each phase of the motor coil 41 is electrically connected to the control device 5 by being sandwiched between the circuit board 51 and the insulator 40.
- a land 57 made of a conductive material is formed on the inner periphery of the through hole 56 through which three screws 54c, 54d, 54e (only the screw 54d is shown in FIG. 1) arranged in the vicinity of the power IC chip 52 are inserted. Is provided.
- the connection end 55 of the motor coil 41 is electrically connected to the control device 5 by being sandwiched between the circuit board 51 and the insulator 40 and contacting the land 57.
- the control device 5 is connected to an in-vehicle power source (battery) 59 through a connector portion 58 formed in the motor case 13.
- the electric pump apparatus 1 becomes a structure attached to the vehicle main body 61 so that the circuit board 51 may be orthogonal to a horizontal direction.
- the pump plate 12 has a mounting portion 63 that protrudes radially outward of the pump case 11 and has a bolt hole 62.
- the attachment part 63 inserts a fastening bolt (not shown) into the bolt hole 62 and attaches the electric pump device 1 to the vehicle main body 61, so that the circuit board 51 is perpendicular to the horizontal direction, that is, in the direction of gravity. It is formed to be parallel.
- the rotor 31 (the output shaft 26) rotates when three-phase driving power is supplied from the control device 5 to the motor 4.
- the pump 3 is driven to supply hydraulic pressure to a transmission (not shown).
- the control device 5 outputs a motor control signal to the drive circuit 71 (power IC chip 52) that supplies three-phase drive power to the motor coils 41u, 41v, and 41w, and the drive circuit 71.
- a microcomputer 72 control IC chip 53 for driving the motor 4 is provided. Then, the control device 5 supplies three-phase driving power to the motor 4 by energizing the motor coils 41u, 41v, and 41w of each phase with a 120-degree rectangular wave.
- the drive circuit 71 three switching arms corresponding to the motor coils 41u, 41v, 41w of each phase are connected in parallel with a pair of switching elements connected in series as a basic unit (switching arm).
- a known PWM inverter is employed. That is, the motor control signal output from the microcomputer 72 defines the on / off state (duty ratio of each phase switching arm) of each phase switching element constituting this drive circuit.
- the drive circuit 71 operates in response to the input of the motor control signal and supplies three-phase drive power to the motor.
- the microcomputer 72 is connected with voltage sensors 73u, 73v, 73w as voltage detecting means for detecting the terminal voltages Vu, Vv, Vw of the motor coils 41u, 41v, 41w.
- the microcomputer 72 estimates the rotational position (rotation angle) of the rotor 31 based on the induced voltage (back electromotive force) of each motor coil 41 detected by the voltage sensors 73u, 73v, 73w. Specifically, the rotational position of the rotor 31 is estimated by detecting the time point (zero cross point) at which the induced voltage becomes the reference potential.
- the microcomputer 72 determines an energization pattern that is a combination of switching elements to be turned on according to the estimated rotational position of the rotor 31, that is, a combination of voltages applied to the motor coils 41u, 41v, and 41w.
- the microcomputer 72 is connected to a current sensor 74 as current detection means for detecting an actual current value I supplied to the motor 4 and a host ECU for controlling the operation of the transmission.
- the microcomputer 72 executes a feedback control to make the actual current value I follow the current command value I * output from the host ECU, whereby a duty ratio corresponding to a deviation between the current command value I * and the actual current value I is obtained. To decide.
- the microcomputer 72 outputs a motor control signal indicating the energization pattern and the duty ratio thus determined to the drive circuit 71. Thereby, three-phase drive power is supplied from the drive circuit 71, and the motor 4 rotates.
- the microcomputer 72 has a failure detection function for detecting a failure in the electrical system that electrically connects the motor 4 and the in-vehicle power supply 59. Specifically, the microcomputer 72 determines that a failure has occurred in the electric system when the actual current value I detected by the current sensor 74 becomes a value that cannot be taken or a discontinuous value, and the electric pump device 1 The driver is informed that the vehicle has failed. That is, in this embodiment, the microcomputer 72 (control IC chip 53) corresponds to a failure detection circuit.
- the electric system includes a drive circuit 71, connection end portions 55 of the motor coils 41, wirings 75 and 76 between the in-vehicle power supply 59 and the drive circuit 71, and between the drive circuit 71 and the connection end portion 55. It consists of
- the electric pump device 1 may be submerged, and rainwater or the like may be submerged in the housing 2.
- the control IC chip 53 having a failure detection function is flooded, it may not be possible to detect a failure in the electrical system.
- the control IC chip 53 is submerged, it is presumed that the failure of the electric system cannot be reliably detected.
- the control IC chip 53 is disposed on the circuit board 51 at a position away from the power IC chip 52, and the electric pump device 1 is attached to the vehicle body 61.
- the electric system is disposed so as to be on the upper side in the gravity direction (upper side in FIG. 2) than the lowest water level Hmin at which a short circuit occurs.
- the control IC chip 53 is disposed above the range of 1/3 from the lower end of the circuit board 51 in the gravity direction, and screws 54c and 54d to which the connection end portions 55 of the motor coils 41 are connected.
- 54e and the power IC chip 52 are arranged on the upper side in the gravity direction.
- the position where the plurality of terminals 52a provided so as to extend downward from the power IC chip 52 in the direction of gravity is the minimum water level Hmin.
- the attachment portion 63 to the vehicle main body 61 is formed so that the circuit board 51 of the control device 5 is orthogonal to the horizontal direction.
- the control IC chip 53 constituting the microcomputer 72 for detecting a failure in the electrical system is placed on the circuit board 51 in the direction of gravity with respect to the minimum water level Hmin that causes a short circuit in the electrical system due to water immersion in the housing 2. It arranged so that it might become the upper side.
- the control IC chip 53 when the housing 2 is submerged, a part of the electric system is submerged before the control IC chip 53 is submerged and cannot be reliably detected (operated). As a result of the short circuit, the electrical system fails.
- the control IC chip 53 since the control IC chip 53 is arranged on the upper side in the direction of gravity, even if there is no short circuit in the electrical system, the control IC chip 53 is partly connected to the electrical system. In addition, rainwater or the like is likely to adhere first. Therefore, before the control IC chip 53 can no longer detect a failure, a part of the electric system is deteriorated, resulting in a failure. Therefore, the control IC chip 53 can more reliably detect a failure in the electric system, and can improve the certainty of the failure detection.
- the control IC chip 53 Since the circuit board 51 is formed so as to be orthogonal to the horizontal direction in a state in which the attachment portion 63 is attached to the vehicle body 61, the control IC chip 53 is moved upward from the lowest water level Hmin at which the electrical system is short-circuited. Can be arranged far apart. Thus, it is possible to reliably prevent the control IC chip 53 from being submerged before a short circuit occurs in the electrical system.
- control IC chip 53 Since the control IC chip 53 is disposed above the range of 1/3 from the lower end of the circuit board 51 in the direction of gravity, it is preferable that the control IC chip 53 be submerged before detecting a failure in the electrical system. Will be able to prevent.
- control IC chip 53 is arranged above the range of 1/3 from the lower end in the gravity direction of the circuit board 51, and the screw 54c to which the connection end 55 of each motor coil 41 is connected. 54d and 54e and the power IC chip 52 are arranged on the upper side in the gravity direction.
- the present invention is not limited to this, and it is only necessary that the control IC chip 53 is disposed above the lowest water level Hmin in the gravity direction.
- the control IC chip 53 is disposed above the range of 1/3 from the lower end of the circuit board 51 in the gravity direction. May be.
- control IC chip 53 and the power IC chip 52 are arranged above the straight line connecting the screws 54 c and 54 e, and the power IC chip 52 is arranged above the control IC chip 53. Good. In this case, the position of the straight line connecting the screws 54c and 54e is the lowest water level Hmin.
- the microcomputer 72 detects a failure in the electric system based on the actual current value I.
- the present invention is not limited to this, and the terminal voltages Vu, Vv detected by the voltage sensors 73u, 73v, 73w. , Vw may be a value that cannot be taken or a discontinuous value, it may be determined that a failure has occurred in the electrical system.
- the mounting portion 63 is formed so that the circuit board 51 is orthogonal to the horizontal direction in a state where the electric pump device 1 is attached to the vehicle body 61.
- the circuit board 51 is not limited to this, and the circuit board 51 is horizontal. You may form so that it may cross with respect to a direction.
- Embodiment 2 In FIG. 4, the electric pump apparatus 1 of Embodiment 2 is shown.
- the configuration is the same as that of the first embodiment except for the attachment form of the control unit 5, and thus detailed description of each part is omitted.
- Embodiment 2 is a case where the mounting portion is formed so that the circuit board 51 is in a horizontal direction in a state where the electric pump device 1 is mounted on the vehicle body.
- the circuit board 51 is fixed to the motor case 13 and the pump case 11 via screws 54.
- the control IC chip 53 is mounted on one surface of the circuit board 51, the power IC chip 52 is mounted on the other surface, and the control IC chip 53 is located above the power IC 52 chip in the gravity direction. Be placed.
- the position where a plurality of terminals protrude from the power IC chip 52 is the lowest water level Hmin.
- the cover 14 is fixed to the pedestal 42 of the motor case 13 by another bolt 60 and closes the lower opening end of the control unit 5.
- the operational effects of the second embodiment are the same as those of the first embodiment. That is, according to such a configuration, when the housing 2 is submerged, the control IC chip 53 is submerged and before the failure detection (operation) can be reliably detected (operation), the electrical system When the part is submerged and a short circuit occurs, the electrical system fails.
- the control IC chip 53 since the control IC chip 53 is arranged on the upper side in the direction of gravity, even if there is no short circuit in the electrical system, the control IC chip 53 is partly connected to the electrical system. In addition, rainwater or the like is likely to adhere first. Therefore, before the control IC chip 53 can no longer detect a failure, a part of the electric system is deteriorated, resulting in a failure. Therefore, the control IC chip 53 can more reliably detect a failure in the electric system, and can improve the certainty of the failure detection.
- an electric pump device that can avoid failure of a failure detection circuit before detecting a failure of an electric system and can increase the certainty of failure detection.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
この点、上記構成では、故障検出回路は、電気系統に故障が生じる最低水位よりも重力方向の上側となるように配置される。そのため、ハウジング内への浸水が発生した場合に、故障検出回路が水没して確実に故障検出(作動)することができなくなる前に、電気系統の一部が水没して短絡が生じることにより同電気系統が故障するようになる。また、上記構成では、故障検出回路が重力方向の上側に配置されるため、電気系統に故障が生じない場合であっても、同電気系統の一部には、故障検出回路よりも先に雨水等が付着し易くなる。そのため、故障検出回路が故障検出することができなくなる前に、電気系統の一部が劣化することにより故障するようになる。従って、故障検出回路は、より確実に電気系統の故障を検出できるようになり、その故障検出の確実性を高めることができる。 That is, it is presumed that when the failure detection circuit is submerged in the case where water has entered the housing, it is impossible to reliably detect a failure in the electrical system.
In this regard, in the above-described configuration, the failure detection circuit is arranged so as to be on the upper side in the gravity direction from the lowest water level at which a failure occurs in the electrical system. For this reason, when water intrudes into the housing, the fault detection circuit is submerged and cannot be reliably detected (operated). The electrical system will break down. In the above configuration, since the failure detection circuit is arranged on the upper side in the direction of gravity, even if no failure occurs in the electrical system, a part of the electrical system has rainwater before the failure detection circuit. Etc. are likely to adhere. For this reason, before the failure detection circuit can detect the failure, a part of the electric system is deteriorated to cause a failure. Therefore, the failure detection circuit can detect the failure of the electric system more reliably and can improve the certainty of the failure detection.
(実施形態1)
図1に示すように、電動ポンプ装置1は、略円筒形状に形成されたハウジング2を備えている。ハウジング2内には、油圧を発生させるポンプ3と、ポンプ3を駆動するモータ4と、モータ4の作動を制御する制御装置5とが一体的に収容されている。なお、以下の説明では、ハウジング2の軸方向一端側(図1における左側)を前側とし、軸方向他端側(図1における右側)を後側とする。
(Embodiment 1)
As shown in FIG. 1, the electric pump device 1 includes a
図3に示すように、制御装置5は、モータコイル41u,41v,41wに三相の駆動電力を供給する駆動回路71(パワーICチップ52)と、駆動回路71にモータ制御信号を出力してモータ4を駆動するマイコン72(制御用ICチップ53)とを備えている。そして、制御装置5は、各相のモータコイル41u,41v,41wに対して120度矩形波通電を行なうことにより、同モータ4に三相の駆動電力を供給する。 Next, the electrical configuration of the electric pump device will be described.
As shown in FIG. 3, the
次に、本実施形態の電動ポンプ装置における故障検出について説明する。
マイコン72は、モータ4と車載電源59とを電気的に接続する電気系統の故障を検出する故障検出機能を備えている。具体的には、マイコン72は、電流センサ74により検出される実電流値Iが取り得ない値、又は不連続な値となった場合に電気系統に故障が発生したと判定し、電動ポンプ装置1が故障した旨を運転者に報知するようになっている。すなわち、本実施形態では、マイコン72(制御用ICチップ53)が故障検出回路に相当する。なお、電気系統は、駆動回路71、各モータコイル41の接続端部55、車載電源59と駆動回路71との間、及び駆動回路71と接続端部55との間の配線75,76を含んで構成されている。 (Failure detection)
Next, failure detection in the electric pump device of this embodiment will be described.
The
(1)電動ポンプ装置1が車両本体61に取り付けられた状態で、制御装置5の回路基板51が水平方向と直交するように同車両本体61への取付部63を形成した。そして、電気系統の故障を検出するためのマイコン72を構成する制御用ICチップ53を、回路基板51上において、ハウジング2内への浸水により電気系統に短絡が生じる最低水位Hminよりも重力方向の上側となるように配置した。 As described above, according to the present embodiment, the following operational effects can be achieved.
(1) With the electric pump device 1 attached to the vehicle
・上記実施形態では、制御用ICチップ53を、回路基板51における重力方向の下端から1/3の範囲よりも上側に配置し、各モータコイル41の接続端部55が接続されるネジ54c,54d,54e及びパワーICチップ52よりも重力方向の上側となるようにした。しかし、これに限らず、制御用ICチップ53が最低水位Hminよりも重力方向の上側に配置されればよく、例えば回路基板51における重力方向の下端から1/3の範囲よりも上側に配置してもよい。また、例えば制御用ICチップ53及びパワーICチップ52をネジ54c,54eを結ぶ直線よりも上側に配置するとともに、パワーICチップ52が制御用ICチップ53よりも上側に配置されるようにしてもよい。なお、この場合には、ネジ54c,54eを結ぶ直線の位置が最低水位Hminとなる。 In addition, the said embodiment can also be implemented in the following aspects which changed this suitably.
In the above embodiment, the
図4に、実施形態2の電動ポンプ装置1を示す。実施形態2では、制御部5の取付形態を除いて、実施形態1と同様の構成であるため、各部の詳細な説明は省略する。 (Embodiment 2)
In FIG. 4, the electric pump apparatus 1 of
Claims (6)
- 油圧を発生させるポンプと、前記ポンプを駆動するモータと、前記モータの作動を制御する制御装置と、これら前記ポンプ、前記モータ及び前記制御装置を収容するとともに車両本体への取付部を有するハウジングとを備えた電動ポンプ装置において、
前記制御装置の回路基板には、前記モータと電源との間を電気的に接続する電気系統の故障を検出する故障検出回路が設けられ、
前記故障検出回路は、前記回路基板上において、前記ハウジング内への浸水により前記電気系統に故障が生じる最低水位よりも重力方向の上側となるように配置されたことを特徴とする電動ポンプ装置。 A pump that generates hydraulic pressure, a motor that drives the pump, a control device that controls the operation of the motor, a housing that houses the pump, the motor, and the control device, and that has a mounting portion to the vehicle body; In the electric pump device provided with
The circuit board of the control device is provided with a failure detection circuit that detects a failure of an electrical system that electrically connects the motor and the power source,
The electric pump device according to claim 1, wherein the failure detection circuit is arranged on the circuit board so as to be above the lowest water level at which a failure occurs in the electrical system due to water immersion in the housing. - 請求項1に記載の電動ポンプ装置において、前記取付部は、前記車両本体に取り付けられた状態で前記回路基板が水平方向と直交するように形成されたことを特徴とする電動ポンプ装置。 2. The electric pump device according to claim 1, wherein the attachment portion is formed so that the circuit board is orthogonal to a horizontal direction in a state of being attached to the vehicle body.
- 請求項1又は2に記載の電動ポンプ装置において、前記故障検出回路は、前記回路基板における前記重力方向の下端から1/3の範囲よりも上側に配置されたことを特徴とする電動ポンプ装置。 3. The electric pump device according to claim 1, wherein the failure detection circuit is arranged above a range of 1/3 from a lower end of the circuit board in the gravity direction.
- 前記取付部は、前記車両本体に取り付けられた状態で前記回路基板が水平方向となるように形成され、前記故障検出回路が回路基板の上側の面に実装されることで、前記最低水位よりも重力方向の上側となるように配置されたものである請求項1に記載の電動ポンプ装置。 The mounting portion is formed so that the circuit board is in a horizontal direction in a state where it is attached to the vehicle body, and the failure detection circuit is mounted on the upper surface of the circuit board, so that the lower than the lowest water level. The electric pump device according to claim 1, wherein the electric pump device is arranged so as to be on an upper side in a gravitational direction.
- 請求項1から4のいずれか一項に記載の電動ポンプ装置において、前記モータに供給される電流を検出する電流検出手段を備え、前記故障検出回路は前記電流検出手段により検出される電流に基づいて前記電気系統の故障を検出することを特徴とする電動ポンプ装置。 5. The electric pump device according to claim 1, further comprising a current detection unit configured to detect a current supplied to the motor, wherein the failure detection circuit is based on a current detected by the current detection unit. An electric pump device that detects a failure of the electric system.
- 請求項1から4のいずれか一項に記載の電動ポンプ装置において、前記モータに印可される電圧を検出する電圧検出手段を備え、前記故障検出回路は前記電圧検出手段により検出される電圧に基づいて前記電気系統の故障を検出することを特徴とする電動ポンプ装置。 5. The electric pump device according to claim 1, further comprising: a voltage detection unit that detects a voltage applied to the motor, wherein the failure detection circuit is based on a voltage detected by the voltage detection unit. An electric pump device that detects a failure of the electric system.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP12732411.9A EP2662568B1 (en) | 2011-01-04 | 2012-01-04 | Electric pump apparatus |
US13/978,292 US20140037472A1 (en) | 2011-01-04 | 2012-01-04 | Electrical pump apparatus |
CN201280004608.0A CN103314215B (en) | 2011-01-04 | 2012-01-04 | Electric pump device |
JP2012551867A JP5994638B2 (en) | 2011-01-04 | 2012-01-04 | Electric pump device |
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JP2011000123 | 2011-01-04 | ||
JP2011-000123 | 2011-01-04 |
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PCT/JP2012/050035 WO2012093678A1 (en) | 2011-01-04 | 2012-01-04 | Electric pump apparatus |
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US (1) | US20140037472A1 (en) |
EP (1) | EP2662568B1 (en) |
JP (1) | JP5994638B2 (en) |
CN (1) | CN103314215B (en) |
WO (1) | WO2012093678A1 (en) |
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JP2019112978A (en) * | 2017-12-21 | 2019-07-11 | 日本電産トーソク株式会社 | Electric oil pump |
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JP2019178648A (en) * | 2018-03-30 | 2019-10-17 | 日本電産トーソク株式会社 | Electric oil pump |
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Also Published As
Publication number | Publication date |
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EP2662568A1 (en) | 2013-11-13 |
JPWO2012093678A1 (en) | 2014-06-09 |
US20140037472A1 (en) | 2014-02-06 |
CN103314215A (en) | 2013-09-18 |
JP5994638B2 (en) | 2016-09-21 |
EP2662568A4 (en) | 2016-08-03 |
EP2662568B1 (en) | 2018-04-18 |
CN103314215B (en) | 2015-12-23 |
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