WO2018016276A1 - Dispositif de pompe à huile électrique - Google Patents

Dispositif de pompe à huile électrique Download PDF

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Publication number
WO2018016276A1
WO2018016276A1 PCT/JP2017/023680 JP2017023680W WO2018016276A1 WO 2018016276 A1 WO2018016276 A1 WO 2018016276A1 JP 2017023680 W JP2017023680 W JP 2017023680W WO 2018016276 A1 WO2018016276 A1 WO 2018016276A1
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WO
WIPO (PCT)
Prior art keywords
oil pump
control
motor
electric oil
electric
Prior art date
Application number
PCT/JP2017/023680
Other languages
English (en)
Japanese (ja)
Inventor
遠藤　和隆
Original Assignee
アイシン精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アイシン精機株式会社 filed Critical アイシン精機株式会社
Priority to CN201780045256.6A priority Critical patent/CN109477479A/zh
Priority to US16/318,831 priority patent/US20190234398A1/en
Priority to EP17830796.3A priority patent/EP3480463A4/fr
Publication of WO2018016276A1 publication Critical patent/WO2018016276A1/fr

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Classifications

    • 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
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • 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
    • F04B49/20—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 by changing the driving speed
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/04—Carter parameters
    • F04B2201/0402—Lubricating oil temperature
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1202—Torque on the axis
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0201—Current
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0209—Rotational speed
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/06—Pressure in a (hydraulic) circuit

Definitions

  • the present invention relates to an electric oil pump device, and more particularly to an electric oil pump device including an electric oil pump driven by a motor.
  • an electric oil pump device including an electric oil pump driven by a motor is known.
  • Such an electric oil pump device is described in, for example, Japanese Patent Application Laid-Open No. 2005-16460.
  • Japanese Patent Application Laid-Open No. 2005-16460 discloses an electric liquid pump control device (electric oil pump) including a hydraulic pump (electric oil pump) driven by a motor and a microcomputer (control unit) for controlling rotation of the electric motor. Apparatus).
  • the hydraulic pump is based on the relationship between the motor current value detected from the motor rotated by the electric power input as a certain initial value and the rotational speed. It is comprised so that the oil temperature discharged from may be estimated. Then, in order to obtain the hydraulic pressure required for the hydraulic pump under the estimated oil temperature condition, current control for calculating the target value of the current supplied to the motor and shifting the motor current value to the target value is performed.
  • the microcomputer calculates a command voltage (duty ratio) to be applied to the motor by proportional control and integral control (PI control) based on the deviation between the target value of the motor current value and the current value. Then, the motor current value during rotation is changed with the control of the command voltage, and the target value is reached. Therefore, the hydraulic pressure required for the hydraulic circuit is ensured by the output control of the motor according to the change in the oil temperature.
  • PI control proportional control and integral control
  • the above-described electric liquid pump (electric oil pump) is activated (driven) when the idling of the engine is stopped when the automobile is stopped, for example. Thereby, the hydraulic pressure is supplied to the clutch engagement of the automatic transmission even in the idling stop state.
  • the electric liquid pump is also activated (driven) when cooling oil is supplied to the cooling jacket of the electric motor of the hybrid vehicle. As a result, cooling oil having a predetermined hydraulic pressure is circulated through the cooling jacket.
  • the present invention has been made to solve the above-described problems, and one object of the present invention is to improve the responsiveness of the output control of the motor so that the hydraulic pressure and the discharge according to the oil temperature condition are improved. It is an object of the present invention to provide an electric oil pump device capable of quickly securing an oil amount.
  • an electric oil pump device includes a motor, an electric oil pump driven by the motor, and an oil pressure of the electric oil pump detected during operation of the electric oil pump.
  • the oil temperature is estimated based on the relationship between at least one of the motor current value or torque and at least one of the discharge oil amount of the electric oil pump or the motor rotation speed, and based on the estimated oil temperature
  • a control unit that adjusts a control parameter for feedback control related to the motor current value or the motor rotation speed.
  • the electric oil pump device includes at least one of the hydraulic pressure, the motor current value, and the torque of the electric oil pump detected during the operation of the electric oil pump, and the electric oil pump.
  • Control that estimates the oil temperature based on the relationship with at least one of the amount of discharged oil and the motor rotation speed, and adjusts the control parameter for feedback control related to the motor current value or the motor rotation speed based on the estimated oil temperature A part.
  • the output control (motor current control) of the electric oil pump can be performed while adjusting the control parameter of the feedback control related to the motor current value or the motor rotation speed based on the estimated oil temperature.
  • the current motor current value can be quickly brought close to the target current value.
  • by improving the responsiveness of the motor output control it is possible to quickly ensure the hydraulic pressure and the amount of discharged oil according to the oil temperature condition.
  • the electric oil pump device since the electric oil pump device according to the one aspect includes the control unit described above, even when the oil viscosity varies according to the oil temperature (the load of the electric oil pump varies), the output control of the motor can be performed. Since responsiveness can be improved, the range of oil temperature (oil viscosity) in which this electric oil pump can be used can be expanded. In addition, even when the design tolerances of the pump unit and the motor constituting the electric oil pump are alleviated (design accuracy is reduced), the output adjustment of the electric oil pump (motor current control) can be performed quickly. Therefore, it is possible to easily perform accuracy control in designing and manufacturing the electric oil pump.
  • control unit preferably determines an excess / deficiency state regarding at least one of the hydraulic pressure or the discharge oil amount of the electric oil pump based on the estimated oil temperature, and an excess / deficiency state.
  • the control parameter of the feedback control related to the motor current value or the motor rotation speed is adjusted so as to avoid the problem.
  • the excess / deficiency state is a shortage state of at least one of the hydraulic pressure or the discharge oil amount of the electric oil pump when the estimated oil temperature is lower than the first threshold value, and the estimated oil temperature is And an excess state of at least one of the hydraulic oil pressure and the discharge oil amount of the electric oil pump in the case where it is larger than the second threshold value, and the control unit is based on the estimated oil temperature and is at least one of the insufficiency state or the excess state It is configured to adjust the control parameter so as to avoid the problem.
  • the electric oil pump device further includes a table in which the estimated value of the oil temperature during the operation of the electric oil pump is associated with the control parameter, and the control unit is based on the table. , Configured to adjust control parameters.
  • control unit preferably controls the control parameter based on a correlation equation in which a correlation between the estimated value of the oil temperature and the control parameter during operation of the electric oil pump is defined. Configured to adjust.
  • the output control of the electric oil pump by adjusting the control parameter (electric Motor current control) can be easily performed.
  • control unit preferably controls the motor by PID control including proportional control, integral control, and differential control, and as a control parameter, the proportional gain of the proportional control, the integral control It is configured to adjust the integral gain and the differential gain of the differential control.
  • the output control of the electric oil pump (current control of the motor) is performed while adjusting the proportional gain, integral gain, and differential gain of the feedback control related to the motor current value or the motor rotation speed based on the estimated oil temperature. ) Can be performed appropriately.
  • the control unit estimates the oil temperature at a predetermined control cycle and, based on the oil temperature estimated at the predetermined control cycle, the motor current value or the motor rotation speed. It is configured to repeatedly adjust the control parameters of the feedback control.
  • the control unit estimates the oil temperature based on the motor current value and the motor rotational speed during at least one of the electric oil pump during steady operation or startup.
  • the control parameter for feedback control related to the motor current value or the motor speed is adjusted based on the estimated oil temperature.
  • the electric oil pump device 100 is mounted on a vehicle (automobile).
  • the electric oil pump device 100 includes an electric oil pump 10, a motor drive circuit 20 for driving the electric oil pump 10, and a microcomputer 30 (an example of a control unit) for transmitting a drive signal to the motor drive circuit 20.
  • the motor drive circuit 20 and the microcomputer 30 may be mounted in the housing of the electric oil pump 10 or may be provided in a control box (not shown) different from the electric oil pump 10. .
  • the electric oil pump 10 includes a motor 11 and a pump unit 12.
  • the electric oil pump 10 has a pump unit 12 connected to a hydraulic circuit 101.
  • the hydraulic circuit 101 has a predetermined flow path resistance R, and the hydraulic pressure necessary for the hydraulic circuit 101 is supplied by driving the pump unit 12.
  • an internal gear type, an external gear type, a centrifugal type, or the like is applied to the pump unit 12.
  • the hydraulic circuit 101 includes a circuit that supplies hydraulic oil necessary for clutch engagement of the automatic transmission when the engine (not shown) is idling stopped while the automobile is stopped.
  • the hydraulic circuit 101 includes a circuit that supplies cooling oil of a necessary hydraulic pressure to a cooling jacket of an electric motor (not shown) of the hybrid vehicle.
  • the electric oil pump 10 is frequently used as an oil pump driven by electric power supplied from the battery 40.
  • the motor drive circuit 20 includes an FET circuit 21 made of a semiconductor switch and a motor drive IC 22.
  • the DC voltage of the battery 40 is applied to the three wires (the U-phase drive coil, the V-phase drive coil, and the W-phase drive coil) of the motor 11 via the FET circuit 21.
  • the FET circuit 21 sequentially applies a voltage between two of the three wires of the motor 11 (between the U phase and the V phase, between the U phase and the W phase, and between the V phase and the W phase) based on the signal from the motor driving IC 22.
  • the FET circuit 21 performs PWM control (duty ratio) that repeatedly switches between a state in which the voltage applied between the two wires is turned on for a predetermined time and a state in which the voltage is turned off for a predetermined time in accordance with a signal from the motor drive IC 22. Control). As a result, the average voltage applied to the motor 11 is controlled to become a control command voltage.
  • PWM control duty ratio
  • the microcomputer 30 includes a calculation unit 31 (an example of a control unit) that performs various calculation processes, a ROM 32 that stores various programs executed by the calculation unit 31 in advance, and data that the calculation unit 31 reads and writes during the calculation process.
  • the RAM 33 includes a unit angle rotation signal and a motor current signal, and an input / output circuit 34 that outputs a command voltage for driving the motor 11 to the motor drive IC 22.
  • the ROM 32 estimates the oil temperature Te based on the motor rotational speed calculation program 1, the motor current value Im (corresponding to torque and hydraulic pressure), and the motor rotational speed N (corresponding to the discharge oil amount) of the motor 11, and pumps.
  • Stored is a motor control program 2 for supplying necessary hydraulic oil from the section 12 to the hydraulic circuit 101.
  • the ROM 32 calculates a difference (current deviation e (t)) between the motor current value Im detected by the current detection circuit 42 and the target current value Itg, and performs PID control including proportional control, integral control, and differential control.
  • the current control program 3 that calculates the command voltage u (t) to be applied to the motor 11 using the, and outputs the command voltage u (t) to the motor drive IC 22 and the table 4 (see FIG.
  • the microcomputer 30 is connected to the ECU 102 on the vehicle body side so as to be able to communicate with each other. Therefore, the microcomputer 30 is configured to operate (calculate) based on a control signal from the ECU 102.
  • the electric oil pump device 100 includes a shunt resistor 41 and a current detection circuit 42 in the control circuit in addition to the motor drive circuit 20 and the microcomputer 30.
  • the shunt resistor 41 is connected to the FET circuit 21, and the current detection circuit 42 measures a voltage between both terminals of the shunt resistor 41 to detect a current value supplied to the motor 11 to detect a motor current signal (motor The current value Im) is sent to the microcomputer 30.
  • the motor 11 is driven based on PID control as shown in FIG. In other words, it is assumed that a command for rotating the motor 11 at a current value including the target current value Itg is transmitted from the ECU 102 (see FIG. 1) side under certain operating conditions.
  • the target current value Itg means a current value for ensuring the hydraulic pressure and the discharge oil amount required for the current hydraulic circuit 101 (see FIG. 1) by rotating the motor 11 with this current value.
  • the microcomputer 30 calculates a current deviation e (t) between the current motor current value Im detected by the current detection circuit 42 and the target current value Itg, and uses the motor current value Im as the target current.
  • Control parameters in PID control include proportional gain Kp (hereinafter referred to as Kp) for proportional control, integral gain Ki (hereinafter referred to as Ki) for integral control, and differential gain Kd (hereinafter referred to as Kd) for differential control. It is. Then, a command voltage u (t) based on the duty ratio generated by the PID control is applied to the motor 11.
  • the command voltage u (t) based on PID control is expressed by Expression (1) shown in the lower area of FIG. That is, the command voltage u (t) is obtained by multiplying the product of the proportional gain Kp and the current deviation e (t), the product of the integral gain Ki and the integration value of the current deviation e (t) from 0 to t, It is given as a value obtained by adding the product of the differential gain Kd and the differential value of the current deviation e (t).
  • the first embodiment is configured such that the adjustment control described below is added to the PID control applied to the electric oil pump 10 (motor 11) based on a command from the calculation unit 31 of the microcomputer 30. ing.
  • the oil temperature Te is estimated based on the relationship between the motor current value Im of the electric oil pump 10 detected during the operation of the electric oil pump 10 and the motor rotational speed N, and the estimated oil temperature
  • the computing unit 31 is configured such that the PID control is performed by adjusting Kp, Ki, and Kd of the PID control relating to the motor current value Im or the motor rotational speed N internally (automatically) based on Te.
  • the correlation between the estimated value of the oil temperature Te with respect to the motor current value Im (corresponding to torque and hydraulic pressure) and the motor rotational speed N (corresponding to the amount of discharged oil) is stored in advance in the ROM 32 (see FIG. 1) of the microcomputer 30. ing.
  • data on the kinematic viscosity of the oil corresponding to the combination of the detected motor current value Im and the motor rotational speed N is stored in the ROM 32.
  • the oil temperature Te is calculated (estimated) based on the kinematic viscosity of the oil acquired from the ROM 32 in accordance with the combination of the motor current value Im and the motor rotation speed N.
  • ⁇ is the kinematic viscosity (mm 2 / s) of the oil
  • k, m and n constants determined by the type of oil
  • Te is the oil temperature indicated by the absolute temperature (K).
  • the microcomputer 30 obtains the kinematic viscosity ⁇ of the oil discharged from the pump unit 12 from the relationship between the motor current value Im detected during the operation of the electric oil pump 10 and the motor rotation speed N.
  • the oil temperature Te corresponding to the obtained oil viscosity (kinematic viscosity ⁇ ) is estimated (calculated) using the above formula (2).
  • the electric oil pump device 100 adjusts the feedback control Kp, Ki, and Kd related to the motor current value Im or the motor rotational speed N based on the estimated oil temperature Te (oil viscosity), while the electric oil pump 10 Output control (current control of the motor 11) is performed.
  • the current motor current value Im can be quickly brought close to the target current value Itg.
  • the motor current value Im (see FIG. 2) is grasped on the microcomputer 30 side based on the voltage between both terminals of the shunt resistor 41 detected by the current detection circuit 42.
  • the motor rotation speed N (see FIG. 2) is the induced voltage generated in each of the number of poles of the motor 11 and the three wires (U-phase drive coil, V-phase drive coil, and W-phase drive coil) of the rotating motor 11.
  • the microcomputer 30 side based on the count number of the zero-cross point (the phase at the time when the induced voltage waveform becomes half of its amplitude) in the waveform.
  • the microcomputer 30 determines an excess / deficiency state related to at least one of the hydraulic pressure or the discharge oil amount of the electric oil pump 10 based on the estimated oil temperature Te (oil viscosity), and an excess / deficiency state. Is configured to adjust the feedback control Kp, Ki, and Kd related to the motor current value Im or the motor rotational speed N.
  • the microcomputer 30 Based on the estimated oil temperature Te (oil viscosity), the microcomputer 30 is configured to adjust Kp, Ki, and Kd in the PID control so as to avoid at least one of an insufficiency state or an excess state. . In order to avoid the shortage state, Kp, Ki and Kd are increased. In order to avoid an excessive state, Kp, Ki and Kd are reduced.
  • the ROM 32 stores (saves) a table 4 as shown in FIG.
  • the estimated oil temperature Te is associated with the control parameters (proportional gain Kp, integral gain Ki, and differential gain Kd) corresponding to each oil temperature Te. Therefore, the calculation unit 31 (see FIG. 1) is configured to adjust Kp, Ki, and Kd based on the table 4.
  • the microcomputer 30 estimates the oil temperature Te based on the motor current value Im and the motor rotation speed N during the steady operation of the electric oil pump 10, and based on the estimated oil temperature Te, the motor current value Im or the motor It is configured to adjust Kp, Ki, and Kd of feedback control related to the rotational speed N.
  • the microcomputer 30 estimates the oil temperature Te at a predetermined control cycle and, based on the oil temperature Te estimated at the predetermined control cycle, feedback control Kp, Ki for the motor current value Im or the motor rotation speed N. And Kd are repeatedly adjusted.
  • step S1 the current motor speed N of the motor 11 (see FIG. 1) is detected based on a command from the microcomputer 30 (see FIG. 1).
  • the motor rotation speed N is the waveform of the induced voltage generated in each of the number of poles of the motor 11 and the three wires (the U-phase drive coil, the V-phase drive coil, and the W-phase drive coil) when the motor 11 starts to rotate. Is obtained based on the count number of zero cross points.
  • step S2 the current motor current value Im of the motor 11 is detected.
  • the motor current value Im is acquired based on the voltage between both terminals of the shunt resistor 41 (see FIG. 1) detected by the current detection circuit 42.
  • step S3 the microcomputer 30 determines whether or not the electric oil pump 10 (motor 11) is in steady operation. If it is determined in step S3 that the vehicle is not in steady operation, the processing flow is temporarily terminated. After the end of this control flow, this control flow shown in FIG. 4 is executed again after a predetermined control cycle has elapsed.
  • step S3 If it is determined in step S3 that the vehicle is in steady operation, the oil temperature Te of the electric oil pump 10 is acquired (estimated) by the microcomputer 30 in step S4.
  • the oil temperature Te is calculated based on the relationship between the motor rotational speed N detected in step S1 and the motor current value Im detected in step S2, and the kinematic viscosity of oil obtained from the ROM 32 (Walther's empirical formula: 2)), the calculation unit 31 (see FIG. 1) calculates.
  • step S5 it is determined whether or not the oil temperature Te is lower than the threshold value T1. If it is determined in step S5 that the oil temperature Te is lower than the threshold value T1 (ie, it is determined that the load of the electric oil pump 10 is “insufficient (output shortage region)”), in step S6, the proportionality The control parameters of the feedback control are adjusted by the microcomputer 30 so as to increase the gain Kp, the integral gain Ki, and the differential gain Kd (see FIG. 2).
  • step S7 If it is determined in step S5 that the oil temperature Te is equal to or higher than the threshold value T1, it is determined in step S7 whether or not the oil temperature Te is greater than the threshold value T2. If it is determined in step S7 that the oil temperature Te is greater than the threshold value T2 (ie, it is determined that the load of the electric oil pump 10 is in the “excess state (overpower region)”), in step S8, the proportional Each control parameter of the feedback control is adjusted by the microcomputer 30 so as to decrease the gain Kp, the integral gain Ki, and the differential gain Kd. Note that the processing flow is temporarily ended after step S6 or step S8. After the end of this control flow, this control flow shown in FIG. 4 is executed again after a predetermined control cycle has elapsed.
  • the oil temperature Te is estimated based on the relationship between the motor current value Im of the electric oil pump 10 detected during the operation of the electric oil pump 10 and the motor rotational speed N.
  • the control parameters proportional gain Kp, integral gain Ki, and differential gain Kd
  • the PID control by the microcomputer 30 is performed based on the adjusted Kp, Ki, and Kd, so that the optimum hydraulic pressure and discharge oil amount required for the current hydraulic circuit 101 (see FIG. 1) are ensured.
  • a command voltage u (t) that is, a duty ratio
  • the motor 11 quickly produces an output for ensuring the hydraulic pressure and the discharge oil amount according to the oil temperature condition.
  • the electric oil pump device 100 in the first embodiment is configured as described above.
  • the oil temperature Te is estimated based on the relationship between the motor current value Im of the electric oil pump 10 detected during the operation of the electric oil pump 10 and the motor rotational speed N, and A microcomputer 30 is provided that adjusts control parameters (proportional gain Kp, integral gain Ki, and differential gain Kd) for feedback control related to the motor current value Im or the motor speed N based on the estimated oil temperature Te.
  • control parameters proportional gain Kp, integral gain Ki, and differential gain Kd
  • the current motor current value Im can be quickly brought close to the target current value Itg, unlike the case of performing general feedback control without adjusting the control parameter.
  • the responsiveness of the output control of the motor 11 it is possible to quickly ensure the hydraulic pressure and the discharge oil amount according to the oil temperature condition.
  • the motor 11 is controlled by PID control including proportional control, integral control, and differential control, and proportional control proportional gain Kp, integral control integral gain Ki, and differential differential control are used as control parameters.
  • the microcomputer 30 is configured to control the gain Kd.
  • the output control (motor) of the electric oil pump 10 is adjusted while adjusting the proportional gain Kp, integral gain Ki, and differential gain Kd of the feedback control related to the motor current value Im or the motor rotation speed N based on the estimated oil temperature Te. 11 current control) can be performed appropriately.
  • the electric oil pump device 100 since the electric oil pump device 100 includes the microcomputer 30 described above, even when the oil viscosity varies according to the oil temperature Te (the load of the electric oil pump 10 varies), the motor 11 can improve the responsiveness of the output control, so that the range of the oil temperature Te (oil viscosity) in which the electric oil pump 10 can be used can be expanded. Even if the design tolerances of the pump unit 12 and the motor 11 constituting the electric oil pump 10 are alleviated (design accuracy is reduced), the output adjustment of the electric oil pump 10 (the motor 11 Current control) can be performed quickly, so that accuracy control in design and manufacture of the electric oil pump 10 can be easily performed.
  • the microcomputer 30 is configured to determine an excess / deficiency state related to at least one of the hydraulic pressure or the discharge oil amount of the electric oil pump 10 based on the estimated oil temperature Te. Then, the microcomputer 30 is configured to adjust the proportional gain Kp, the integral gain Ki, and the differential gain Kd of the feedback control related to the motor current value Im or the motor rotational speed N so as to avoid this excess / deficiency state.
  • the excess / deficiency state is a deficiency state (output deficiency region) of at least one of the hydraulic pressure or the discharge oil amount of the electric oil pump 10 when the estimated oil temperature Te is lower than the threshold value T1. And an excess state (overpower region) of at least one of the hydraulic pressure or the discharge oil amount of the electric oil pump 10 when the estimated oil temperature Te is larger than the threshold value T2. Then, based on the estimated oil temperature Te, the microcomputer 30 is configured to adjust the proportional gain Kp, the integral gain Ki, and the differential gain Kd so as to avoid at least one of an insufficiency state or an excess state.
  • the load state of the electric oil pump 10 can be easily estimated based on whether the estimated oil temperature Te (oil viscosity) is lower than the threshold value T1 or higher than the threshold value T2. Then, the electric oil pump 10 is adjusted by adjusting the proportional gain Kp, the integral gain Ki, and the differential gain Kd of the feedback control related to the motor current value Im or the motor rotational speed N according to the estimated load state (insufficient state or excessive state). It is possible to quickly avoid at least one of the output shortage state or the excessive output state. That is, it is possible to avoid insufficient lubrication of oil in the lubrication system due to an insufficient output state, insufficient hydraulic pressure of the automatic transmission, and insufficient cooling of the cooling jacket due to oil. Further, it is possible to avoid the occurrence of power loss (energy loss) in the electric oil pump 10 due to the overpower state.
  • the estimated value (oil temperature Te) of the oil temperature during operation of the electric oil pump 10 is associated with the proportional gain Kp, the integral gain Ki, and the differential gain Kd.
  • the table 4 is provided.
  • the microcomputer 30 is configured to adjust the proportional gain Kp, the integral gain Ki, and the differential gain Kd based on the table 4.
  • the control parameters (Kp, Ki) are referred to by referring to the table 4 in which the estimated value of the oil temperature Te during the operation of the electric oil pump 10 is associated with the proportional gain Kp, the integral gain Ki, and the differential gain Kd.
  • output control of the electric oil pump 10 current control of the motor 11
  • Kd can be easily performed.
  • the oil temperature Te is estimated at a predetermined control cycle
  • the feedback control proportional gain related to the motor current value Im or the motor rotational speed N is based on the oil temperature Te estimated at the predetermined control cycle.
  • the microcomputer 30 is configured to repeatedly adjust Kp, integral gain Ki, and differential gain Kd.
  • the oil temperature Te is estimated based on the motor current value Im and the motor rotation speed N during the steady operation of the electric oil pump 10, and the motor current value Im is calculated based on the estimated oil temperature Te.
  • the microcomputer 30 is configured to adjust the proportional gain Kp, the integral gain Ki, and the differential gain Kd of the feedback control related to the motor rotational speed N. As a result, it is possible to perform drive control of the electric oil pump 10 that appropriately follows load fluctuations during steady operation of the electric oil pump 10.
  • Ki and Kd are configured to be adjusted.
  • the transfer function G (s) when the input is K ⁇ u (t) and the output is ⁇ (t) is the Laplace transform of the above equation of motion (equation (3)). Therefore, it is shown by the following formula (4).
  • the above equation (4) represents a transfer function related to the so-called primary system response.
  • Kp is a proportional gain
  • Ki is an integral gain
  • Kd is a differential gain.
  • the feedback control for the electric oil pump 10 shown in FIG. 2 is replaced with a block diagram (before equivalent conversion) shown in the left frame of FIG. That is, the transfer element relating to PID control is represented by a transfer function Gc (s), and the transfer element relating to rotation control of the electric oil pump 10 is represented by a transfer function G (s).
  • a feedback transmission element is represented by H (s).
  • a block diagram after equivalent conversion in the right frame
  • the transfer function after equivalent conversion in the control system of motor 11 is expressed by the following equation (6).
  • the proportional gain Kp, the integral gain Ki, and the differential gain Kd which are design parameters for PID control, are calculated based on the transfer function after the equivalent conversion shown in the above equation (6) (see FIG. 6).
  • the microcomputer 30 (see FIG. 1) is configured to be adjusted.
  • a specific determination method for Kp, Ki, and Kd a limit sensitivity method proposed by Ziegler Nichols or a transient response method may be applied. Alternatively, methods other than those described above may be used.
  • the friction coefficient B based on the estimated value (oil temperature Te) of the oil temperature during operation of the electric oil pump 10 (during steady operation) is proportional.
  • a microcomputer so as to adjust the proportional gain Kp, the integral gain Ki, and the differential gain Kd based on the correlation formula (see the above formula (6)) in which the correlation with the gain Kp, the integral gain Ki, and the differential gain Kd is defined. 30 is configured.
  • the correlation formula in which the correlation between the estimated value (oil temperature Te) of the oil temperature during operation of the electric oil pump 10 and the control parameters (Kp, Ki, and Pd) is defined (see the above formula (6)).
  • the output control of the electric oil pump 10 (the current control of the motor 11) by adjusting the control parameters (Kp, Ki and Kd) can be easily performed based on the above.
  • the remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.
  • the oil is based on the relationship between the motor current value Im detected during operation of the electric oil pump 10 (during steady operation) and the motor rotational speed N of the electric oil pump 10.
  • the temperature Te is estimated, and the control parameters Kp, Ki, and Pd for feedback control related to the motor current value Im or the motor rotation speed N are adjusted based on the estimated oil temperature Te, but the present invention is not limited to this.
  • the oil temperature Te may be estimated based on the relationship between the torque directly detected from an acceleration sensor attached to the shaft of the motor 11 and the motor rotation speed N of the motor 11, or the pump unit 12.
  • the oil temperature Te may be estimated based on the relationship between the hydraulic pressure discharged from the hydraulic pressure (hydraulic pressure information) and the amount of discharged oil (discharged oil amount information). Further, the microcomputer 30 grasps all of the torque, motor current value Im and hydraulic pressure of the electric oil pump 10 and all of the motor rotational speed N and the amount of discharged oil of the electric oil pump 10, and the mutual detection of these detected values. A predetermined calculation may be performed based on the relationship to estimate the oil temperature Te, and control parameters (Kp, Ki, and Pd) in PID control may be adjusted based on the estimated oil temperature Te.
  • the oil temperature Te is estimated based on the motor current value Im and the motor rotation speed N during steady operation of the electric oil pump 10, and based on the estimated oil temperature Te.
  • the control parameters (Kp, Ki, and Pd) of feedback control related to the motor current value Im or the motor rotation speed N are adjusted, the present invention is not limited to this.
  • the oil temperature Te is estimated based on the motor current value Im and the motor rotation speed N not only during steady operation but also when the electric oil pump 10 is started, and Kp, Ki, and Pd are based on the estimated oil temperature Te. You may comprise so that it may adjust.
  • a sensorless three-phase brushless DC motor is used as the motor 11, but the present invention is not limited to this. That is, the present invention may be applied to output control of the electric oil pump 10 including the motor 11 provided with a position detection sensor such as a Hall element.
  • the present invention is not limited to this.
  • the present invention may be applied to start control of an electric oil pump mounted on an internal combustion engine for equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Transmission Device (AREA)

Abstract

L'invention concerne un dispositif (100) de pompe à huile électrique comportant : d'une pompe à huile électrique (10) entraînée par un moteur électrique (11) ; d'un micro-ordinateur (30) qui ajuste les paramètres de commande (Kp, Ki, Kd) d'une commande de rétroaction concernant la valeur de l'intensité du moteur (Im) ou la vitesse du moteur (N) sur la base de la température de l'huile (Te) estimée sur la base de la relation entre : la pression d'huile de la pompe à huile électrique (10), la valeur du courant du moteur et/ou le couple ; la quantité d'huile évacuée par la pompe à huile électrique et/ou la vitesse du moteur.
PCT/JP2017/023680 2016-07-22 2017-06-28 Dispositif de pompe à huile électrique WO2018016276A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780045256.6A CN109477479A (zh) 2016-07-22 2017-06-28 电动油泵装置
US16/318,831 US20190234398A1 (en) 2016-07-22 2017-06-28 Electric Oil Pump Device
EP17830796.3A EP3480463A4 (fr) 2016-07-22 2017-06-28 Dispositif de pompe à huile électrique

Applications Claiming Priority (2)

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JP2016144257A JP2018013209A (ja) 2016-07-22 2016-07-22 電動オイルポンプ装置
JP2016-144257 2016-07-22

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WO (1) WO2018016276A1 (fr)

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WO2020169308A1 (fr) * 2019-02-21 2020-08-27 Renault S.A.S Procede de controle du demarrage d'une pompe a huile
CN112416030A (zh) * 2020-11-30 2021-02-26 天津民昌科技有限公司 一种基于油泵电机电气特性的油温估算方法

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CN109931253B (zh) * 2019-03-29 2020-07-07 四川虹美智能科技有限公司 一种确定压缩机的控制参数的方法及装置
JP6942754B2 (ja) * 2019-06-11 2021-09-29 株式会社ミツバ 自動車のトランスミッションのクラッチ係合用電動オイルポンプ、自動車のトランスミッションのクラッチ係合用電動オイルポンプ制御方法、車両及び自動車のトランスミッションのクラッチ係合車両用電動オイルポンプ
JP7287218B2 (ja) * 2019-09-26 2023-06-06 ニデックパワートレインシステムズ株式会社 電動オイルポンプの制御装置、電動オイルポンプ
US20210293326A1 (en) * 2020-03-18 2021-09-23 Karma Automotive Llc Transmission system for an electric vehicle
CN113833841A (zh) * 2020-06-08 2021-12-24 上海汽车集团股份有限公司 变速箱控制方法和汽车变速箱
CN112983798B (zh) * 2021-03-25 2023-02-24 烟台杰瑞石油装备技术有限公司 应用于电驱压裂设备的控制方法及其控制装置
US20240184314A1 (en) * 2022-12-01 2024-06-06 Starbucks Corporation Fluid dispensing system
CN116163942A (zh) * 2023-02-08 2023-05-26 阿尔特汽车技术股份有限公司 电动汽车油冷式动力总成的电动油泵的控制方法及装置

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WO2020169308A1 (fr) * 2019-02-21 2020-08-27 Renault S.A.S Procede de controle du demarrage d'une pompe a huile
FR3093139A1 (fr) * 2019-02-21 2020-08-28 Renault S.A.S. Procede de controle du demarrage d’une pompe a huile
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CN112416030A (zh) * 2020-11-30 2021-02-26 天津民昌科技有限公司 一种基于油泵电机电气特性的油温估算方法

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JP2018013209A (ja) 2018-01-25
EP3480463A1 (fr) 2019-05-08
US20190234398A1 (en) 2019-08-01
EP3480463A4 (fr) 2019-05-08
CN109477479A (zh) 2019-03-15

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