JP2019106812A - Inverter device - Google Patents

Abstract

To provide an inverter device capable of easily adjusting so as to acquire drive characteristics desired by a user using no display in particular.SOLUTION: An inverter device comprises: a data acquisition unit for acquiring various information on operation control for each prescribed interval as trace data; and a user interface unit having an operation unit for a user to perform input operation, and a display unit for displaying the various information in response to the input operation. The inverter device also comprises: a drawing display unit for, when a user specifies an item to be an object of monitoring via the operation unit, processing trace data acquired in real time, which is monitor information corresponding to the item, into drawing data and displaying it on the display unit; and a parameter adjustment unit that, when the user specifies a control parameter to be an adjustment object via the operation unit, allows the control parameter to be adjusted on a screen where the drawing display unit displays the drawing data.SELECTED DRAWING: Figure 3

Description

  Embodiments of the present invention relate to an inverter device.

  In the inverter device, adjustment parameters are provided so that the acceleration / deceleration characteristics and output characteristics of the motor to be controlled can be changed to desired characteristics. These parameters vary widely from those that change the characteristics of simple acceleration and deceleration, to those that suppress the upper limit of the output from the viewpoint of protection, etc. The target to be influenced is also various such as frequency, current, voltage, temperature, etc. It is. Therefore, the user needs to adjust the corresponding parameters after confirming the parameters for approaching the desired driving characteristics on the document such as the user manual.

  Also, in order to confirm whether the desired drive characteristics are obtained for the user with respect to the time change of monitor information such as the motor current value, voltage value, and rotational speed, monitor information of the inverter can be personal computer or dedicated It is necessary to visualize using the indicator of the above, or to observe using a separately prepared measuring instrument and data logger. That is, in adjustment with the inverter device alone, it is difficult to set the drive characteristics required by the user simply and intuitively.

  For example, in Patent Document 1, the motor is operated a plurality of times according to the output position command pattern to acquire a plurality of operation characteristic data of the motor, and information of the plurality of operation characteristic data is output to a display device for displaying the data. There is disclosed an electric motor control device which can be displayed and set as a control parameter of the electric motor a parameter corresponding to one of the operation characteristic data selected from among the operation characteristic data.

JP, 2014-204562, A

In the configuration of Patent Document 1, a control parameter corresponding to the characteristic data selected by the user is set out of the operation characteristic data obtained when the motor is automatically operated a plurality of times automatically, and the driving desired by the user is not necessarily required. Characteristics can not always be realized.
Therefore, an inverter device that can be easily adjusted so as to obtain a drive characteristic desired by a user without using a separate display or the like is provided.

The inverter device according to the embodiment includes a data acquisition unit that acquires various information related to operation control as trace data at predetermined intervals, an operation unit that the user performs an input operation, and a display unit that displays the various information according to the input operation. And a user interface unit having
When the user designates an item to be monitored by the user via the operation unit, trace data acquired in real time, which is monitor information corresponding to the item, is processed into drawing data and displayed on the display unit And a drawing display unit
A parameter adjustment unit that enables adjustment of the control parameter on the screen on which the drawing display unit is displaying the drawing data when the user designates a control parameter to be adjusted through the operation unit; .

In the first embodiment, a functional block diagram of an inverter device Graphic showing graphical interface A diagram showing an example of screen transition of the display unit Flow chart of the process of drawing trace data Diagram showing an example of changing the drawing state when the parameter exceeds the threshold The figure which shows the example which drew two threshold values of the upper limit and the lower limit The figure which shows the example which switched the adjustment parameter to the current control gain from Screen C shown in FIG. FIG. 10 is a second embodiment, showing an example of a drawing state of a display unit. It is a third embodiment, and is a diagram showing an example of a drawing state of a display unit.

    First Embodiment

  Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 is a functional block diagram of an inverter device. The inverter device 1 includes an inverter circuit unit 2 that drives a motor or the like (not shown). The inverter circuit unit 2 is switching-controlled by the control unit 3. The control unit 3 is configured by a CPU, a microcomputer or the like, and corresponds to a drawing display unit, a parameter adjustment unit, and a data storage control unit. The control unit 3 is connected to a non-volatile memory 4 such as a flash ROM, for example. The control unit 3 is also connected to a display unit 5 for displaying various information and an operation unit 6 for the user to input various settings and control parameters. Hereinafter, the control parameter may be referred to as “adjustment parameter”.

  The control unit 3 corresponding to the data acquisition unit controls the operation of the inverter circuit unit 2 and acquires various information related to the control, such as current, rotational speed, torque, etc., as trace data at predetermined intervals. Then, the acquired trace data is stored in the non-volatile memory 4 corresponding to the data storage unit.

  As shown in FIG. 2, the display unit 5 and the operation unit 6 constitute a graphical interface 7. The graphical interface 7 corresponds to a user interface unit. The display unit 5 is, for example, a liquid crystal display, and the operation unit 6 includes, for example, a plurality of keys 6K and a touch wheel 6W. The touch wheel 6W rotates the setting value displayed on the display unit 5 or moves the selection cursor downward by rotating the user's fingertip in the right direction while touching the wheel portion. In addition, the touch wheel 6W similarly rotates the user's fingertip in the left direction, thereby performing an operation of decreasing the setting value or moving the selection cursor upward. The OK button at the center of the touch wheel 6W reflects the setting value and determines the selection item by pressing operation. The key 6K composed of "F1" to "F4" is a function key whose function changes in accordance with the transition of the screen, and a function corresponding to the screen transition described later is assigned.

  FIG. 3 shows an example of the screen transition of the display unit 5. When the user tries to adjust the drive characteristics of the motor, the screen A is displayed first, and an arbitrary number of trace targets are selected from control information which is a plurality of trace targets. The control information selected at this time may be single or plural.

  Next, a list of adjustment parameters related to the control information selected by the user is displayed as shown in screen B, and the user selects an arbitrary parameter from the displayed adjustment parameters. In addition, when the related adjustment parameter is single, the control part 3 may select an adjustment parameter automatically, and when selecting a parameter automatically, the display of Screen B is abbreviate | omitted. Also good. The name of the adjustment parameter selected here and the current setting value are displayed on the next screen C.

  On the screen C, the trace data of the control information selected on the screen A is displayed with the one axis in the x-axis direction and the y-axis direction as the time axis and the other axis as the physical quantity. In this example, the "current" selected as the trace target is indicated by a solid line, and the "primary frequency" is indicated by a broken line. Also, "current limit" is selected as the adjustment parameter. The display form of the physical quantity may be physical unit notation, or may be a percentage notation with respect to a separately defined reference value. The trace data drawn on the screen C can start, stop, or reset the trace at any timing.

  FIG. 4 shows a flowchart of processing for drawing trace data in the present embodiment. First, at the start of drawing trace data, the trace data is initialized (S1). After that, until "Stop interrupt" which is a drawing stop instruction is input (S4; NO), acquisition of the latest monitor value and addition of the monitor value to the trace data (S2) and drawing of the trace data (S3) And repeat. When the stop instruction is input (S4; YES), in the subsequent step S5, the user ends the display of trace data or saves the trace data (S6), initializes the trace data and starts drawing anew Select (S1).

  The screen C displays the name of the control information selected on the screen A, the name of the adjustment parameter selected on the screen B, and the current setting value. Then, while the steps S1 to S5 in the flowchart shown in FIG. 4 are being performed, the corresponding adjustment parameter can be changed. On the screen C, for example, if it is an adjustment parameter that can be drawn overlapping with trace data, that is, it can be drawn by overlapping, such as “current limit”, it is possible to draw in the form of overlapping the current setting value with the trace data. As described above, by drawing the setting values of the adjustment parameter in the form of overlapping on the display unit 5, the user can adjust the parameter intuitively and easily.

  Here, the adjustment parameter is a parameter having a threshold such as a current limit, and when the threshold is exceeded, the drawing state of the monitor information is changed. FIG. 5 shows an example in which the drawing state is changed. In this example, a period in which the current exceeds the threshold is drawn by changing the solid line to a broken line. By changing the drawing mode as described above, even when the drawing is difficult to visually recognize due to the low screen resolution of the display unit 5 or the like, it becomes easy to visually judge whether the threshold value is exceeded. In addition, the drawing mode may be changed by changing the display color, drawing in a blinking state, or changing the thickness of the line.

  For example, as shown in FIG. 6, when there are two upper and lower limit values in the threshold, as in the case of limiting the drive speed of the motor to an arbitrary speed and several Hz above and below the frequency, as shown in FIG. Draw each threshold.

  Furthermore, in the screen C shown in FIG. 3, the parameter to be adjusted is switched to another adjustment parameter not selected in the screen B. The adjustment target is switched by, for example, “F1” and “F4” of the function key 6K. The switch destination is the parameter listed on the screen B. By pressing the “F1” key, one adjustment parameter that is just above the currently displayed adjustment parameter is pressed by pressing the “F4” key. Switch to the adjustment parameter below.

  FIG. 7 shows an example in which the adjustment parameter is switched to the “current control gain” on the screen C. In this example, the user can adjust the current control gain while confirming with the trace result displayed on the display unit 5 so as to suppress the oscillation of the current value to be controlled.

  The trace data stored and drawn in the present embodiment may be stored in the non-volatile memory 4 as image data in a binary format or a predetermined format by the control unit 3 or CSV (Comma Separated Value) It may be stored in the non-volatile memory 4 as text data that can be processed by a personal computer, such as a format. Further, the drawing data is also converted into a predetermined format, such as data of a predetermined format such as a bitmap format, and the like, and is similarly stored. Those data can be transferred to a personal computer or a smartphone by, for example, a web server function installed in the inverter device 1 or a dedicated setting tool. Also, the data may be stored in an external memory externally attached to the inverter device 1. The stored data may be transferred to an external device such as a personal computer, a portable terminal, or a data server regardless of wired or wireless, or may be transferred between devices via an external memory such as an SD card.

  As described above, according to the present embodiment, the inverter device 1 includes the graphical interface 7 including the operation unit 6 that the user performs the input operation, and the display unit 5 that displays various information according to the input operation. The control unit 3 controls the operation of the inverter circuit unit 2 and acquires various information related to the control as trace data at predetermined intervals. Then, when the user designates an item to be monitored by the user via the operation unit 6, the control unit 3 processes monitor information corresponding to the item into drawing data and causes the display unit 5 to display it in real time. When the control parameter to be adjusted is designated through the operation unit 6, the control parameter can be adjusted on the screen displaying the drawing data.

  In addition, when the user designates an item to be traced through the operation unit 6, the control unit 3 is monitor information corresponding to the item, and is a trace acquired in the past and stored in the non-volatile memory 4. The data is processed into drawing data and displayed on the display unit 5. Also in this case, when the user designates the control parameter to be adjusted through the operation unit 6, the control parameter can be adjusted on the screen displaying the drawing data.

  Thus, it is possible to graphically confirm the time change of the control characteristic without using an external device other than the inverter device 1 and easily grasp the influence on the drive characteristic by adjusting the control parameter. The adjustment process of can be significantly shortened, and the accuracy of adjustment can be improved.

  In addition, when the control parameter specified by the user via the operation unit 6 limits the value of the item to be monitored, the control unit 3 displays the monitor in real time on the display unit 5 When the value of the information exceeds the threshold, the display form of the drawing data of the portion exceeding the threshold is changed. As a result, even when drawing is difficult to visually recognize because the screen resolution of the display unit 5 is low, it is easy to visually determine whether the threshold value is exceeded.

Further, the control unit 3 stores data obtained by converting drawing data of monitor information into a predetermined format or data obtained by converting trace data into a predetermined format in an internal or external storage unit. This makes it possible to analyze monitor information in a more flexible form.
Second Embodiment

  Hereinafter, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and different parts will be described. In the second embodiment, the control unit 3 draws in advance the ideal time change of the control object set by the adjustment parameter of the inverter device 1. For example, as shown in FIG. 8, when the speed control gain is "20", a curve of an ideal time change of the primary frequency to be controlled by the inverter device 1 is displayed by a broken line, and the trace data is exceeded by a solid line. Wrap and draw. The drawing before and after drawing of the ideal curve and the trace data may be reversed.

Thereby, the user visually compares the ideal time change with the actually acquired trace data to visually adjust the adjustment parameter as to how the control parameter is properly adjusted or how to adjust it. The judgment material can be easily obtained. The trace data to be drawn may be either data acquired in real time or data acquired in the past and stored in the non-volatile memory 4.
Third Embodiment

In the third embodiment, trace data and an ideal curve acquired in the past are drawn overlapping with trace data accumulated in real time. Note that which data is drawn first is optional. For example, in the example shown in FIG. 9, the trace data of the primary frequency acquired in the past and recorded in the nonvolatile memory 4 is drawn as “M1” by a broken line. As a result, as in the second embodiment, the user can easily obtain visual judgment material as to the adjustment guidelines as to whether or not the control parameters are properly adjusted. The trace data acquired in the past may be compared with each other by drawing two or more trace data acquired in the past instead of the trace data accumulated in real time.
(Other embodiments)

  The screen configuration in each embodiment is merely an example, and the presence / absence of display of each information, the display form and the display location may be different from those in the embodiment. In addition, the key operation in the embodiment and the behavior corresponding thereto are also an example, and the number of keys, the name, the function, the shape, and the operation may be different from those in the embodiment. Further, the example of screen transition is also an example, and a mode in which a single screen of these screen transitions is individually displayed or a mode in which only a single screen is mounted may be used, or the screen transition may be performed in combination with other display screens. You may go.

  Moreover, names such as "current" and "current limit" are not limited to these applications, and are presented as an example only, and can be read as all monitors and adjustment parameters that the inverter device can hold. The data drawn on the screen C may be trace data accumulated in real time, or may be drawn trace data acquired in the past and stored in the nonvolatile memory 4.

  The unit, magnification and offset of trace data can be freely adjusted by user operation. The inverter device 1 may automatically adjust any of the unit, magnification and offset, or a plurality of items.

Which of the ideal trace data, the trace data acquired in real time, the trace data acquired in the past, and the trace data of an ideal time change are to be processed into drawing data and displayed on the display unit 5 , May be selectable by the user.
The embodiments may be implemented in combination.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

  In the drawings, 1 indicates an inverter device, 3 indicates a control unit, 4 indicates a non-volatile memory, 5 indicates a display unit, 6 indicates an operation unit, and 7 indicates a graphical interface.

Claims (7)

A data acquisition unit that acquires various information related to operation control as trace data at predetermined intervals; a user interface unit having an operation unit that the user performs an input operation; and a display unit that displays the various information according to the input operation. An inverter device comprising:
When the user designates an item to be monitored by the user via the operation unit, trace data acquired in real time, which is monitor information corresponding to the item, is processed into drawing data and displayed on the display unit And a drawing display unit
A parameter adjustment unit that enables adjustment of the control parameter on the screen on which the drawing display unit is displaying the drawing data when the user designates a control parameter to be adjusted through the operation unit; Inverter device.   The inverter device according to claim 1, further comprising a data storage control unit for storing data obtained by converting the drawing data into a predetermined format or data obtained by converting the trace data into a predetermined format in an internal or external storage unit. A data storage unit for storing trace data acquired by the data acquisition unit;
The drawing display unit processes monitor data corresponding to the item, which is trace data acquired in the past, into drawing data, and superimposes the drawing data on the trace data acquired in real time. The inverter device according to claim 1, wherein the display unit displays the information. When the user sets a control parameter via the operation unit, the drawing display unit generates ideal trace data of an item to be the target of the monitor, corresponding to the setting.
The inverter device according to any one of claims 1 to 3, wherein the ideal trace data is processed into drawing data and superimposed on the drawing data of monitor information to be displayed on the display unit.   The drawing display unit processes any of the ideal trace data, the trace data acquired in the real time, and the trace data acquired in the past into the drawing data and causes the display unit to display the processed drawing data. The inverter device according to claim 4, wherein the user can select When the control parameter specified by the user via the operation unit is to limit the value of the item targeted by the monitor,
The drawing display unit according to any one of claims 1 to 5, wherein, when the value of the monitor information displayed on the display unit exceeds the restriction, the drawing display unit changes the display mode of the drawing data of the exceeded portion. The inverter apparatus of description.   The inverter device according to any one of claims 1 to 6, wherein the value of the control parameter is processed into drawing data so as to be superimposed on the drawing data.

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