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motor control unit

A technology of control devices and motors, applied in the direction of motor control, control systems, measuring devices, etc., can solve problems such as applying large loads and damage

Active Publication Date: 2019-03-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some abnormalities cause a large load to be applied to other normal parts, and the normal parts may also be damaged.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] figure 1 It is a block diagram which shows the structure of Embodiment 1 of the motor control apparatus which concerns on this invention. figure 1 The illustrated motor control device includes a drive unit 1, a control unit 4, a position detector 5, a command generation unit 6, a drive current detection unit 7, a friction characteristic estimation unit 8, a friction model unit 9, a friction variation analysis unit 10, and temperature information Acquisition section 11 . The drive unit 1 includes a drive mechanism 2 represented by a linear motion guide unit, and a motor 3 . The electric motor 3 generates a driving force in accordance with the driving current supplied from the control unit 4 via the driving current detecting unit 7 to drive the driving mechanism 2 . The position detector 5 attached to the electric motor 3 detects the position of the electric motor 3 and outputs a position detection signal. The command generation unit 6 is set to cause the drive unit 1 ...

Embodiment approach 2

[0056] Image 6 It is a block diagram which shows the structure of Embodiment 2 of the motor control apparatus which concerns on this invention. The motor control device of the present embodiment is configured to figure 1 The structure of the invention adds a temperature friction storage unit 12 at normal temperature, a temperature friction storage unit 13 at high temperature, a temperature friction storage unit 14 at low temperature, and a temperature friction model generating unit 15, and has a friction model unit 9a instead of the friction model unit 9. Temperature information values ​​and friction characteristics are set in the temperature friction storage unit 12 at normal temperature, the temperature friction storage unit 13 at high temperature, and the temperature friction storage unit 14 at low temperature. The temperature friction model generation unit 15 generates a temperature friction model based on the temperature information values ​​and friction characteristics...

Embodiment approach 3

[0061] Figure 7 It is a block diagram which shows the structure of Embodiment 3 of the motor control apparatus which concerns on this invention. The motor control device of the present embodiment has the following configuration: Image 6 In the structure, the temperature friction automatic setting unit 16 and the automatic setting period measuring unit 17 for measuring the period during which the automatic setting is performed are added, and instead of the temperature friction storage unit 12 at normal temperature, there is a temperature friction storage unit 12a at normal temperature, instead of The high temperature temperature friction storage unit 13 has a high temperature temperature friction storage unit 13 a, and the low temperature temperature friction storage unit 14 has a low temperature temperature friction storage unit 14 a. The temperature friction automatic setting unit 16 sets the temperature information value and the friction characteristic estimated value in ...

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Abstract

In order to remove the influence of temperature changes and extract frictional fluctuations due to abnormalities, a motor control device is provided that includes: a command generation unit (6) that outputs a drive command signal as a command to the drive unit (1) , the drive unit (1) includes a drive mechanism (2) driven by a motor (3); a position detector (5), which outputs a position detection signal of the drive unit (1); a drive current detection unit (7), which outputs The drive current detection value of the drive current supplied to the motor (3); the control unit (4), which is input with a drive command signal and a position detection signal to generate a drive force command signal corresponding to the drive force command signal and the drive current detection value The driving current is supplied from ground; the friction characteristic estimation part (8), which receives the driving force signal and the position detection signal and outputs the friction characteristic estimation value; the temperature information acquisition part (11), which obtains the temperature of the driving part and outputs the temperature information value; The friction model unit (9) sets a reference friction model whose characteristics vary with the temperature of the drive unit (1) in the friction model unit, and the friction model unit outputs the reference friction characteristic based on the temperature information value; and the friction variation analysis unit (10 ) that outputs a friction variation value based on the variation of the friction characteristic estimated value with respect to the reference friction characteristic.

Description

technical field [0001] The present invention relates to a motor control device. Background technique [0002] At present, for a mechanical device having a driving part composed of a driving mechanism such as an electric motor and a linear guide part, in the case where the mechanical device stops operation due to an abnormality caused by the life of the driving part or damage, until the repair of the driving part Until it is completed, production activities have to be stopped for a long period of time. In addition, a part of the abnormality causes a large load to be applied to other normal parts, and the normal parts may also be damaged. In view of the above-mentioned problems, there is a desire to discover an abnormality due to life or damage early so that the abnormal part can be treated by repair or replacement before the mechanical device is stopped. [0003] For example, Patent Document 1 discloses a machine diagnostic apparatus that reads torque commands and speeds du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/60
CPCH02P23/14H02P29/60G01R31/343H02P29/024
Inventor 关口裕幸池田英俊村越信哉稻妻一哉矶田隆司
Owner MITSUBISHI ELECTRIC CORP