JPH05146053A - Transformer with operation display - Google Patents

Abstract

PURPOSE:To provide a transformer with an operation display function which is maintained to be in an optimum operation state, has a long life, and can output a secondary voltage without any distortion. CONSTITUTION:A current/voltage measuring means 10 which measures current and voltage of a primary coil and a secondary coil of a transformation part 9 and a temperature-measuring means 11 which measures a temperature of the transformation part 9 are connected to a control means 12 and the control means 12 displays an operation state of the transformation part 9 on a display means 4. Also, a specified setting value is set to the control means 12 by a setting value input means 8 and an alarm is output from the control means 12 to an output means 7 when the setting value is exceeded by an operation state of the transformation part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer that is used, for example, attached to an electric device to transform a primary voltage into a predetermined secondary voltage.

[0002]

2. Description of the Related Art Conventionally, a transformer of this type has a transformer section composed of a primary coil and a secondary coil, and a primary voltage applied to the primary coil by the transformer section is set to a predetermined value. The secondary voltage is transformed and the secondary voltage is supplied from the secondary coil to the electric device.

[0003]

By the way, when the ambient temperature of the transformer rises, its rated output decreases as the temperature rises. Therefore, even if the transformer operates within the rated output range when the ambient temperature is room temperature, the transformer may operate beyond the rated output when the ambient temperature becomes high. Even in such a case, since the operating conditions such as the ambient temperature and the secondary voltage of the above-mentioned conventional transformer are unknown, the operator does not recognize that the transformer exceeds the rated output and is left as it is. ing. When the transformer is operated in such a high ambient temperature, not only the life of the transformer is shortened, but also when the transformer is operated beyond the rated output, the secondary voltage output from the secondary coil is output. The waveform of may be distorted and this distortion may adversely affect the electrical equipment connected to the transformer.

The present invention has been made to solve the above problems, and provides a transformer with an operation display function that can maintain an appropriate operating state, has a long life, and can output a secondary voltage without distortion. It is an object.

[0005]

DISCLOSURE OF THE INVENTION A transformer with an operation display function according to the present invention comprises a transformer section having a primary coil and a secondary coil, and a current-voltage measurement for measuring the current and voltage of both coils of the transformer section. Means, temperature measuring means for measuring the temperature of the transformer portion, control means for receiving output signals from the both measuring means, and display means driven by the control means to display the operating state of the transformer portion, The control means is provided with set value input means for setting a predetermined set value, and output means for outputting an alarm output from the control means when the operating state of the transformer section exceeds the set value. ..

[0006]

According to the above construction, since the operating state of the transformer can be confirmed by the display means, the ambient temperature and rated output of the transformer can be maintained in proper states. As a result, the life of the transformer is not shortened by operating at high temperature, and it is possible to operate by exceeding the rated output.
The next voltage will not be distorted. Also, if a preset temperature is set in the controller by the set value input means, an alarm output will be output when the ambient temperature exceeds this set value, so the ambient temperature rises and the rated output decreases. However, even if the operating condition of the transformer exceeds the rated output, it is not left as it is.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a transformer with an operation display function according to the present invention, in which a main body 1 has an external connection terminal 2 of a primary coil (not shown) and an external connection terminal of a secondary coil (not shown). 3 and 3 are provided. The primary voltage applied to the external connection terminal 2 of the primary coil is transformed into a predetermined secondary voltage, and the secondary voltage is supplied from the external connection terminal 3 of the secondary coil to an electric device (not shown). Display means 4 on the main body 1
Is provided and, as shown in FIG.
Is composed of, for example, a display 5 and a changeover switch 6. On this display 5, a plurality of types of numerical values indicating the operating state of the transformer from the control means described later are selectively displayed by the switching operation of the changeover switch 6.

On one side of the display means 4, there is provided an alarm output section 7 which constitutes an output means, and a setting switch 8 which constitutes a set value input means. The alarm output section 7 outputs an alarm output from the control means described later. The output section 7 is provided with an alarm device (not shown) that operates by the alarm output, such as an alarm lamp and an alarm buzzer. Connected.

As shown in FIG. 3, the current and voltage of both coils of the transformer 9 having a primary coil and a secondary coil (not shown) are measured by the current-voltage measuring means 10. Also,
The temperature of the transformer 9 is measured by the temperature measuring means 11. Output signals from these measuring means 10 and 11 are notified to the control means 12, and the control means 12 drives the display means 4 to display the measured values on the display means 4. In addition, the control device 12 uses 1 based on the above measured value.
The distortion rate of the voltage waveform of the secondary coil and the distortion rate of the voltage waveform of the secondary coil are calculated and displayed on the display means 4. In addition, the control means 12 includes a set value input means 8 for setting a predetermined set value in the control means 12 and a control device 1 when the operating state of the transformer 9 exceeds the set value.
The output means 7 for outputting an alarm output by 2 is connected.

In the above structure, the changeover switch 6 (FIG. 2) shows the operating state of the transformer 9, that is, the respective currents, voltages and distortion factors of the primary coil and the secondary coil and the temperature of the transformer 9 on the display means 4. Is selectively displayed by the switching operation of. Further, for example, when 100 ° C. is set as the temperature set value from the set value input means 8, the temperature of the transformer 9 becomes 100.
When the temperature exceeds ℃, the control means 12 outputs an alarm output to the output means 7, the alarm device connected to the output means 7 is driven, and the operating state of the transformer 9 is set to a predetermined set value for the operator. You will be notified that you have exceeded the limit.

As described above, according to the transformer with an operation display function of the present invention, since the operating state of the transformer can be confirmed by the display means 4, the ambient temperature and rated output of the transformer can be maintained in an appropriate state. it can. As a result, the life of the transformer is not shortened by operating in a high temperature state, and the secondary voltage is not distorted by operating beyond the rated output. Further, if a predetermined temperature is set in the controller 12 by the set value input means 8 in advance, an alarm output is output when the ambient temperature exceeds the set value.
Since the ambient temperature rises and the rated output decreases, the operating condition of the transformer exceeds the rated output.
It is never left untouched.

In the above embodiment, the temperature is set as the set value, but the voltage, current and distortion rate of both coils may be set, and particularly the distortion rate of the voltage of the secondary coil may be set. If set, an alarm output will be output when the distortion of the waveform of the secondary voltage output from the secondary coil exceeds a predetermined set value, so the above-mentioned distortion will have an adverse effect on electrical equipment connected to the transformer. Can be given. Further, if the control means 12 is configured to store the maximum value and the minimum value of each measurement value and the time-series transition and the operator can take out the stored information, as described above on the basis of this information. It is also possible to anticipate the occurrence of such problems and take preventive measures against them.

[0013]

As described above, according to the present invention, the operating state can be confirmed by the display means, and when the operating state exceeds a predetermined set value, the output means is provided to warn the operator. Therefore, it is possible to provide a transformer with an operation display function that is maintained in an appropriate operating state, has a long life, and can supply a voltage without distortion.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a transformer with an operation display function according to the present invention.

FIG. 2 is a plan view showing a main part of the transformer.

FIG. 3 is a block diagram showing an internal configuration of the transformer.

[Explanation of symbols]

 4 display means 7 output means 8 set value input means 9 transformer section 10 current / voltage measuring means 11 temperature measuring means 12 control means

Claims (1)

[Claims] 1. A transformer section having a primary coil and a secondary coil, current-voltage measuring means for measuring current and voltage of both coils of the transformer section, and temperature measuring means for measuring the temperature of the transformer section. Control means for receiving the output signals from the both measuring means, display means for driving the control means to display the operating state of the transformer, and set value input means for setting a predetermined set value in the control means. And an output unit for outputting an alarm output from the control unit when the operating state of the transformer exceeds the set value.