WO2018020636A1 - モータ制御システム - Google Patents
モータ制御システム Download PDFInfo
- Publication number
- WO2018020636A1 WO2018020636A1 PCT/JP2016/072138 JP2016072138W WO2018020636A1 WO 2018020636 A1 WO2018020636 A1 WO 2018020636A1 JP 2016072138 W JP2016072138 W JP 2016072138W WO 2018020636 A1 WO2018020636 A1 WO 2018020636A1
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- WIPO (PCT)
- Prior art keywords
- motor
- inertia
- torque command
- command
- motor control
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/12—Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/143—Inertia or moment of inertia estimation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- the present invention relates to a motor control system including a motor control device that drives an industrial machine such as a machine tool.
- an apparatus for driving an industrial machine is configured to operate with a motor connected via a mechanical transmission mechanism to transmit power to a moving object to be driven, and the motor operates in a target operation pattern.
- a motor control device that drives the motor based on a command signal input from the controller and a detection signal of a detector that detects the position or speed of the motor.
- J T / a from the generated torque T when the motor is operating and the acceleration a that can be calculated from the speed feedback observed by the detector.
- Inertia J is estimated based on the relational expression.
- the torque T is the product of the current I applied to the motor and the torque constant Kt, and can be calculated from the speed feedback of the motor and the current detection result.
- Patent Document 1 applies a sinusoidal signal to the torque command in the motor control device, observes the speed feedback and the current applied to the motor, and performs inertia.
- a motor control device that performs estimation is proposed.
- Patent Document 1 discloses together the solution method which performs the process which averages after converting into the signal made into absolute value about this point, there existed a problem that a process became more complicated.
- the present invention has been made in view of the above, and an object thereof is to obtain a motor control system capable of realizing a simple inertia estimation with high accuracy and stability.
- the present invention provides a command signal for controlling a motor that drives a mechanical load, a detection signal output from a detector installed in the motor, and a control gain.
- a control processing unit that generates a torque command based on the torque command, controls the motor based on the torque command, a parameter setting unit that executes parameter setting for setting a limit value and a control gain of the torque command, a detection signal, and torque
- An inertia estimation unit that estimates the inertia of the motor based on the command.
- the inertia estimation unit estimates the inertia in a state where self-excited vibration is generated in the motor by parameter setting.
- the motor control system according to the present invention has an effect that it is possible to realize simple inertia estimation with high accuracy and stability.
- FIG. 1 is a block diagram showing a configuration of a motor control system according to a first embodiment of the present invention.
- 1 is a diagram illustrating a hardware configuration when the functions of a controller or a motor control device according to a first embodiment are realized by a computer.
- a flowchart showing processing at the time of inertia estimation in the first embodiment Waveform diagram showing motor speed and torque command when self-excited vibration occurs in the first embodiment
- FIG. 1 is a block diagram showing a configuration of a motor control system 100 according to the first embodiment of the present invention.
- FIG. 2 is a block diagram modeling a motor control process executed by the motor control device 2 according to the first embodiment.
- FIG. 3 is a diagram illustrating a hardware configuration when the functions of the controller 1 or the motor control device 2 according to the first embodiment are realized by a computer.
- FIG. 4 is a flowchart showing processing at the time of inertia estimation in the first embodiment.
- FIG. 5 is a waveform diagram showing motor speed and torque command when self-excited vibration is generated in the first embodiment.
- a motor control system 100 includes a controller 1 that generates a position command, a motor control device 2 that is a servo amplifier that supplies appropriate power to a motor 3 that drives a mechanical load (not shown), and the supplied power to the motor.
- a motor 3 for converting the rotational power of the shaft and a detector 4 installed on the motor 3 are provided.
- the position command is a command signal for controlling the motor 3, and the controller 1 transmits the generated position command to the motor control device 2.
- a specific example of the detector 4 is an encoder, and a detection signal output from the detector 4 is transmitted to the motor control device 2.
- the controller 1 receives an operation of the operator, and generates a position command to be transmitted to the motor control device 2 based on the received content, specifically, a program command described in a program input by the operator. .
- the detector 4 detects the rotation angle of the motor 3 and outputs the detected value as a detection signal.
- the motor control device 2 supplies appropriate power to the motor 3 based on the position command generated by the controller 1 and the detection signal of the detector 4.
- the controller 1 is set for parameters used in an operation unit 5 that receives an operation of an operator, a command generation unit 6 that generates a position command to be transmitted to the motor control device 2, and a control processing unit 8 of the motor control device 2 described later.
- Parameters used in the control processing unit 8 include a torque command limit value and a control gain, which will be described later. Setting the parameter value is called parameter setting. Therefore, the parameter setting unit 11 performs parameter setting.
- the motor control device 2 performs an inverter circuit 7 that supplies power to the motor 3, a control processing unit 8 that sends a power command to the inverter circuit 7 based on the position command received from the controller 1, and an inertia estimation process of the motor 3. And an inertia estimation unit 9 to perform.
- the control processing unit 8 executes a position control calculation based on the position command and outputs a speed command
- a speed control unit 82 executes a speed control calculation based on the speed command and outputs a torque command.
- a current control unit 83 that executes a current control calculation that outputs a power command based on the torque command.
- the command generation unit 6 generates a position command for causing the motor 3 to perform a desired operation based on the driving condition input to the operation unit 5 by the operator, and the generated position command is It transmits to the control processing unit 8.
- the control processing unit 8 executes a feedback control calculation to generate a power command.
- the feedback control calculation includes a position control calculation by the position control unit 81, a speed control calculation by the speed control unit 82, and a current control calculation by the current control unit 83.
- the inverter circuit 7 frequency-converts the input voltage and the input current based on the power command given from the control processing unit 8 and supplies appropriate power to the motor 3. As a result, the operation requested by the operator is realized.
- parameters such as a set value of each control gain for calculation in the control processing unit 8 required during normal operation, and a torque limit value for preventing the current from being applied beyond the maximum allowable current of the motor 3 are set.
- the set value is transmitted from the parameter setting unit 11 to the control processing unit 8 in the initial communication sequence when the controller 1 and the motor control device 2 are powered on. Further, the parameter setting state by the parameter setting unit 11 and the contents of the operation state of the motor 3 are notified to the operator via the display unit 10.
- FIG. 2 models the motor control processing in the motor control device 2 as a block diagram of feedback control by proportional control, and models the processing by the control processing unit 8, the motor 3 and the detector 4 of FIG. .
- s represents a Laplace operator.
- the position gain Kp and the speed gain Kv are control gains used in the control processing unit 8.
- the position gain block 21 corresponds to the process in the position control unit 81
- the speed gain block 22 corresponds to the process in the speed control unit 82.
- the functions of the position gain block 21, the speed gain block 22 and the differentiator 23 are included in the function of the control processing unit 8.
- the load 24 and the integrator 25 model the processing in the motor 3 and the detector 4.
- the position of the motor 3 output from the integrator 25 corresponds to the detection signal output from the detector 4, that is, the rotation angle of the motor 3.
- the position gain block 21 multiplies the difference between the position command and the position of the motor 3 output by the integrator 25 by the position gain Kp to obtain a speed command, and outputs the speed command.
- the differentiator 23 differentiates the position of the motor 3 output from the integrator 25 to obtain the speed of the motor 3 and outputs the speed of the motor 3.
- the speed gain block 22 multiplies the difference between the speed command given from the position gain block 21 and the speed of the motor 3 given from the differentiator 23 by the speed gain Kv to obtain a torque command, and outputs the torque command.
- blocks corresponding to the current control unit 83 and the inverter circuit 7 of FIG. 1 are omitted.
- the torque command output from the speed gain block 22 is converted into a torque current corresponding to the torque command and output to the load 24.
- the load 24 converts the torque current into the speed of the motor 3 using the inertia J.
- the integrator 25 integrates the speed output from the load 24 to determine and output the position of the motor 3.
- the transfer characteristic of the control system shown in FIG. 2 is expressed by the following formula (1).
- the functions of the controller 1 or the motor control device 2 are a CPU (Central Processing Unit) 51, a memory 52, an interface 53, and a dedicated circuit 54 as shown in FIG. It is realized by.
- a part of the functions of the controller 1 or the motor control device 2 is realized by software, firmware, or a combination of software and firmware.
- Software or firmware is described as a program and stored in the memory 52.
- the CPU 51 implements the functions of each unit by reading and executing the program stored in the memory 52. That is, the controller 1 or the motor control device 2 stores a program that results in the step of executing the operation of the controller 1 or the motor control device 2 when the function of each unit is executed by the computer.
- the memory 52 is provided.
- the memory 52 is a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Nonvolatile Memory, or an EEPROM (Electrically Erasable Memory)
- RAM Random Access Memory
- ROM Read Only Memory
- flash memory an EPROM (Erasable Programmable Read Only Nonvolatile Memory
- EEPROM Electrically Erasable Memory
- a semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD (Digital Versatile Disk) are applicable.
- the CPU 51 of the controller 1 realizes the functions of the command generation unit 6 and the parameter setting unit 11 by reading and executing the program stored in the memory 52.
- the interface 53 of the controller 1 has a function for transmitting and receiving signals to and from the motor control device 2.
- a specific example of the dedicated circuit 54 of the controller 1 is a processing circuit of the operation unit 5 and the display unit 10.
- the CPU 51 of the motor control device 2 implements the functions of the control processing unit 8 and the inertia estimation unit 9 by reading and executing a program stored in the memory 52.
- the interface 53 of the motor control device 2 has a function for transmitting and receiving signals to and from the controller 1.
- a specific example of the dedicated circuit 54 of the motor control device 2 is the inverter circuit 7.
- controller 1 or the motor control device 2 can realize the functions described above by hardware, software, firmware, or a combination thereof.
- Embodiment 1 a specific processing method of inertia estimation in Embodiment 1 will be described with reference to FIG.
- the command generation unit 6 stops outputting a normal position command to the motor control device 2 (step S101).
- the parameter setting unit 11 sets a torque command limit value for limiting the torque command generated by the motor 3 during the estimation of the inertia in the self-excited vibration generation state in the speed control unit 82 (step S102).
- the parameter setting unit 11 further changes the set value of the control gain in the control processing unit 8 (step S103). Specifically, in step S103, the parameter setting unit 11 decreases the value of the speed gain Kv used by the speed control unit 82 or increases the value of the position gain Kp used by the position control unit 81. Change the set value.
- the inertia estimation unit 9 determines whether self-excited vibration has occurred in the motor 3 by the parameter setting by the parameter setting unit 11 (step S104). Specifically, the inertia estimation unit 9 determines whether self-excited vibration has occurred based on data obtained from the control processing unit 8. When the self-excited vibration has not occurred (step S104: No), the parameter setting unit 11 repeatedly performs the process of step S103. Therefore, the parameter setting unit 11 changes the set value of the control gain stepwise until self-excited vibration occurs. As a result, the set value of the control gain is decreased or increased stepwise until self-excited vibration occurs.
- step S104 When self-excited vibration has occurred (step S104: Yes), the inertia estimation unit 9 executes an inertia estimation process (step S105). That is, the inertia estimation unit 9 estimates the inertia of the motor 3 in a state where the self-excited vibration is generated in the motor 3.
- the limit value is set for the torque command in a state where the self-excited vibration of the frequency f shown in the mathematical formula (2) is generated
- the vibration of the torque command having a rectangular wave shape as shown in FIG. 5 is generated.
- the torque current input to the motor 3 also vibrates in the same waveform as the torque command.
- the inertia estimation unit 9 performs inertia estimation in a state where the speed and torque command of the motor 3 have a steady waveform.
- the inertia estimation unit 9 calculates the acceleration of the motor 3 based on the speed of the motor 3 output from the differentiator 23. Specifically, the acceleration when the speed of the motor 3 is accelerating or decelerating at a constant inclination as described above is obtained. And the inertia estimation part 9 estimates the inertia J of the motor 3 by the calculation which divides the value of the torque command which the speed control part 82 outputs with the acceleration of the motor 3 obtained as mentioned above. That is, the inertia estimation unit 9 can easily estimate the inertia J by calculation using the speed and torque command of the motor 3 obtained from the control processing unit 8.
- the calculation for inertia estimation by the inertia estimation unit 9 is a value in which the absolute value of the rectangular wave torque command shown in FIG. 5 is the torque command limit value and the acceleration of the motor 3 is constant. It is preferable to execute in a state where
- step S105 if inertia estimation is executed in a state where a mechanical load is connected to the motor 3, the inertia of the motor 3 including the mechanical system is obtained.
- inertia estimation is executed in a state where no mechanical load is connected to the motor 3, the inertia of the motor 3 alone is obtained.
- the parameter setting unit 11 After the inertia estimation process (step S105), the parameter setting unit 11 returns the parameter values used in the control processing unit 8 set in steps S102 and S103 to the original state where normal operation is possible (step S106). Thus, the inertia estimation operation can be completed.
- the inertia estimation can be realized only by a simple process such as changing the setting of parameters used in the control processing unit 8 of the motor control device 2. it can. That is, the motor control system 100 realizes the inertia estimation by a simple process only by performing a control gain changing process and a torque command restricting process using a mechanism generally provided in the motor control system. Can do. Thus, the motor control system 100 can realize inertia estimation without mounting a special process or signal pattern for inertia estimation inside the motor control device 2.
- the calculation process in which the torque command and the acceleration of the motor 3 have a constant value is stably executed in a state where the self-excited vibration of the motor 3 is generated. Perform inertia estimation where possible. That is, since it is possible to estimate inertia using a stationary signal, high-accuracy and stable inertia estimation can be realized.
- the vibration frequency is adjusted in advance based on the formula (2) by adjusting the control gain setting value.
- the range of values can be adjusted. Therefore, the motor control system 100 can also adjust the vibration width, which is a value obtained by integrating the speed of the motor 3 being estimated by the vibration period, by controlling both the limit value and the frequency of the torque command. is there.
- the motor control system 100 can flexibly adjust the vibration for estimating the inertia in accordance with conditions such as the installation location of the moving body of the mechanical device or the stroke length of the moving body.
- the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
Abstract
Description
J=T/a
の関係式に基づいてイナーシャJを推定する。ここでトルクTは、モータに印加される電流Iとトルク定数Ktとの積であり、モータの速度フィードバックと電流検出結果から演算することができる。
以下、本発明の実施の形態1にかかるモータ制御システム100について図1から図5を用いて説明する。図1は、本発明の実施の形態1にかかるモータ制御システム100の構成を示すブロック図である。図2は、実施の形態1にかかるモータ制御装置2が実行するモータ制御処理をモデル化したブロック線図である。図3は、実施の形態1にかかるコントローラ1またはモータ制御装置2の機能をコンピュータで実現する場合のハードウェア構成を示す図である。図4は、実施の形態1におけるイナーシャ推定時における処理を示すフローチャートである。図5は、実施の形態1における自励振動発生時のモータの速度およびトルク指令を示す波形図である。
Claims (6)
- 機械負荷を駆動するモータを制御するための指令信号と、前記モータに設置された検出器から出力される検出信号と、制御ゲインと、に基づいてトルク指令を生成し、前記トルク指令に基づいて前記モータを制御する制御処理部と、
前記トルク指令の制限値および前記制御ゲインを設定するパラメータ設定を実行するパラメータ設定部と、
前記検出信号および前記トルク指令に基づいて、前記モータのイナーシャを推定するイナーシャ推定部と、
を備え、
前記イナーシャ推定部は、前記パラメータ設定により前記モータに自励振動が発生した状態で前記イナーシャを推定する
ことを特徴とするモータ制御システム。 - 前記イナーシャ推定部は、前記トルク指令が矩形波状になっている状態で前記イナーシャを推定する
ことを特徴とする請求項1に記載のモータ制御システム。 - 前記イナーシャ推定部は、前記トルク指令の絶対値が前記制限値になっている状態で前記イナーシャを推定する
ことを特徴とする請求項1または2に記載のモータ制御システム。 - 前記イナーシャ推定部は、前記検出信号から求めた前記モータの加速度および前記トルク指令に基づいて、前記イナーシャを推定する
ことを特徴とする請求項1から3のいずれか1つに記載のモータ制御システム。 - 前記制御ゲインは、位置ゲインまたは速度ゲインである
ことを特徴とする請求項1から4のいずれか1つに記載のモータ制御システム。 - 前記パラメータ設定部は、前記自励振動が発生するまで、前記制御ゲインを段階的に変更する
ことを特徴とする請求項1から5のいずれか1つに記載のモータ制御システム。
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CN201680032344.8A CN107873122B (zh) | 2016-07-28 | 2016-07-28 | 电动机控制系统 |
PCT/JP2016/072138 WO2018020636A1 (ja) | 2016-07-28 | 2016-07-28 | モータ制御システム |
US15/564,109 US20180262153A1 (en) | 2016-07-28 | 2016-07-28 | Motor control system |
JP2017507885A JP6161854B1 (ja) | 2016-07-28 | 2016-07-28 | モータ制御システム |
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US20220170809A1 (en) * | 2019-04-15 | 2022-06-02 | Covidien Lp | Method of calibrating torque sensors of instrument drive units of a surgical robot |
CN113748597A (zh) * | 2019-04-16 | 2021-12-03 | 三菱电机株式会社 | 电动机控制装置 |
CN111745646B (zh) * | 2020-06-10 | 2021-12-24 | 杭州凯尔达机器人科技股份有限公司 | 机器人伺服电机增益参数控制方法及系统 |
CN113500454B (zh) * | 2021-07-21 | 2022-09-20 | 新代科技(苏州)有限公司 | 一种智慧主轴加减速的方法 |
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- 2016-07-28 JP JP2017507885A patent/JP6161854B1/ja active Active
- 2016-07-28 US US15/564,109 patent/US20180262153A1/en not_active Abandoned
- 2016-07-28 WO PCT/JP2016/072138 patent/WO2018020636A1/ja active Application Filing
- 2016-07-28 CN CN201680032344.8A patent/CN107873122B/zh active Active
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JPH05328778A (ja) * | 1992-05-19 | 1993-12-10 | Fuji Electric Co Ltd | ブラシレスモータのイナーシャ推定装置 |
JP2002078369A (ja) * | 2000-08-22 | 2002-03-15 | Yokogawa Electric Corp | サーボモータ制御装置の調整方法およびその装置 |
JP2005080333A (ja) * | 2003-08-28 | 2005-03-24 | Yaskawa Electric Corp | 負荷イナーシャ算出方法 |
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CN107873122A (zh) | 2018-04-03 |
US20180262153A1 (en) | 2018-09-13 |
CN107873122B (zh) | 2019-05-07 |
JP6161854B1 (ja) | 2017-07-12 |
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