JPS62104486A - Power converter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Use Ark The present invention is a power converter in which an electric motor is provided with adjustable operating parameters for changing the rotational speed, the power converter having multiple adjustable operating parameters for setting different operating parameters. Potentiometers are provided, for example potentiometers for setting the voltage characteristic curve, acceleration time, deceleration time and starting boost.

BACKGROUND OF THE INVENTION Power converters of the above type are known per se. Power converters of this type are used for steplessly varying the rotational speed of an electric motor.

In order to achieve optimal load reduction, it is necessary to precisely adjust all operating parameters to the respectively occurring operating conditions. The operating conditions are defined by the machine driven by the electric motor.

Problem to be Solved by the Invention In the hitherto known power converters of the type mentioned at the outset, the detection of the respective set operating parameters can only be carried out using expensive measuring devices and measuring methods, so that corresponding adjustments cannot be made. can only be performed by a trained professional.

It is an object of the invention to provide a known power converter of the type mentioned at the outset in such a way that the most important operating parameters can be easily configured and monitored, with the configuration and monitoring being able to be carried out even by non-specialists. The purpose is to make sure that

Means for solving the problem This problem is solved in the power converter of the type mentioned at the beginning.
At least the potentiometer for setting the operating parameters is connected to an indicating device, and the operating parameter of each potentiometer set in each case can be indicated via the indicating device. .

Example Next, embodiments of the present invention will be described in detail using the drawings.

The power converter, designated by the reference numeral 10, is equipped with a number of potentiometers 11 for setting various operating parameters for the operation of the electric motor, designated by the reference numerals V;, +2.

As can be seen in the block circuit diagram, all the telesiometers 11 are connected to an indicating device 14 via a meter 13.

Via the selection switch 15 (and the individual potentiometers 1
1 is selected individually.1. The operating parameters set by each selected potentiometer 11 are then
4, and each time an operating parameter is changed by adjusting the corresponding botelesiometer 11, it is also displayed directly via the indicating device 14.

In the illustrated embodiment, all potentiometers 11
Only one indicating device 14 is provided for each potentiometer 11, each potentiometer 11 being able to be called out separately via a selection switch 15, as already mentioned.

Apart from this embodiment, it would of course also be possible to provide a separate indicator device 14 for each potentiometer 11, but this would be significantly more expensive. In any case, even with such an expensive solution the invention can be implemented.

The flowcharts of FIGS. 2-4 illustrate the operation of the power converter with respect to operating parameter settings.

As is clear from FIG. 2, the individual potentiometers 11 can be called up individually via the selection switches 15. When the selection switch 15 is set to a predetermined potentiometer 11, the computer 13 first calls out the setting amount of the selected potentiometer 11. These set variables are read in converted form for the computer 13, processed with a corresponding calculation program and stored. In the calculation program, the detected value is further processed and indicated to the indicating device 14 as an absolute value.

In FIG. 2, for example, below position 5, motor 1
The progression for the setting between acceleration 11.17 and acceleration 2 is shown. After selection of the corresponding potentiometer and reading of the actual setting value of this potentiometer, this setting value is processed in the calculation blog 20. The calculated values detected in this way constitute parameters for further calculation operations. This calculated value is stored in a further calculation program 21 and is further converted by means of corresponding potentiometer settings so that the acceleration time obtained for impact can be indicated on the indicating device 14 as an absolute value in seconds.

The values stored in the calculation program 21 are needed for further calculation operations as already mentioned.

This value is read in a separate calculation program 22, shown in FIG. It is detected whether I' or l should be performed.

”-, for example, after H corresponding calculation programs 3o and 31 under positions 3 and 4 and another calculation program 32 (see FIG. 4), the maximum frequency f
The MAX or minimum frequency f-- MIN is set, indicated and maintained. The values serving as a measure for the start-up boost can be set, indicated and maintained, for example under Bonjons 1 and 2 and after the corresponding calculation program 40, /I I, /I 2 (see FIG. 3). be done.

Under Bonjon 6, as an example for setting further operating parameters, the values for the corresponding "deceleration time" can be determined via corresponding calculation programs 50 and 51 as well as another calculation program 52 (see FIG. 3). is set.

4. Effects of the Invention With the configuration of the present invention, each set operating parameter of the potentiometer can be immediately indicated without using an expensive measuring device, and each change in the set value can also be indicated immediately. .

This allows even non-specialists to adjust various operating parameters.

Moreover, it is conceivable that a type of remote control-1 could be carried out as follows: an expert at the power converter manufacturer gives instructions to a less-expert user via voice communication, and the instructions are followed by Make sure people on site follow.

This method is particularly advantageous when operating conditions change over time and settings once made have to be changed accordingly.

The essential advantage of the power converter of the present invention is that all settings can be
The advantage is that the settings can be made without the need to operate the motor itself.

[Brief explanation of drawings]

Fig. 1 is a block circuit diagram for changing the rotational speed of the electric motor, and Figs. 2, 3, and 4 explain the operation of the power converter shown in Fig. 1 in terms of operating parameter = 7-setting. FIG. 2 is a flowchart diagram. 10・Power converter, 11... Potentiometer, 12
...Electric motor, 13 Computer, 14... Instruction device, 15
...Selection switch →

Claims (1)

[Claims] 1. A power converter having a settable operating parameter for changing the rotational speed of an electric motor, in which a plurality of potentiometers are provided for setting various operating parameters, and at least the above-mentioned A potentiometer (11) for setting the operating parameters of the indicator device (14)
), the power converter is characterized in that the operating parameters set for each of the individual potentiometers (11) can be indicated via the indicating device. 2. One indicating device (14) common to all potentiometers (11) is provided, and each potentiometer (11) can be controlled via one selection switch (15).
2. Power converter according to claim 1, in which the operating parameters set can be called up separately and the set operating parameters can be displayed on the indicating device (14). 3. Power converter according to claim 1, characterized in that a separate indicator device (14) is provided for each potentiometer (11).