JPH10145145A - Large power transmission equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the fluctuation width of output by measuring the inner temperature of a power amplification means and correcting transmission output fluctuation to be small based on the temperature. SOLUTION: When a power amplification means 11 starts power amplification, temperature difference TD between the inner temperature TAMP of the means 11 an the detected temperature T0 of a temperature detection means 13 increases and is saturated at TDMAX. The temperature difference TD reduces with the stop of the power amplification of the means 11 and finally turns to zero. On the other hand, a temperature difference estimation means 14 models the change of the temperature difference TD or calculates it by an approximate calculation. A temperature difference correction means 15 adds the detected temperature T0 of the means 13 to the temperature difference TD which the means 14 calculates. The inner temperature estimation value temperature TOUT of the means 11 is obtained, and the transmission output of the means is corrected in an output correction means 16. Then, the fluctuation width of transmission output is reduced so as to provided a superior large power transmission equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-power transmitting apparatus in which, when the transmitting output of a high-power transmitting apparatus fluctuates due to temperature, the fluctuation range of the transmitting output is made as small as possible by output correction means.

[0002]

2. Description of the Related Art In a conventional large power transmission apparatus, as a measure against fluctuations in transmission output due to temperature, the temperature of a radiator provided with the power amplification means of the large power transmission apparatus by the temperature detection means or the ambient temperature of the power amplification means. Is detected, and the output correction means corrects the transmission output based on the detected temperature to reduce the fluctuation range of the transmission power.

As disclosed in JP-A-1-36124, the transmission power control means detects the output of the power amplifying means by a detecting means, and sets the detected value to the surrounding value detected by the temperature detecting means. By adding temperature compensation,
The fluctuation range of the transmission output is reduced.

[0004]

However, in any of the above-described large current transmitting devices, when the power amplifying means controls the amplification of the transmission output, the temperature inside the power amplifying means immediately before the power amplifying means operates. And accurate temperature correction is expected because there is no temperature difference between the temperature detection unit and the temperature detection unit.However, when the power amplification unit starts power amplification, the power amplification unit generates heat. The temperature difference between the temperature inside the power amplifying means and the temperature detected by the temperature detecting means gradually increases due to the thermal resistance between the power amplifying means and the portion where the temperature detecting means detects the temperature. Finally, a certain temperature difference determined by the heat generation amount of the power amplifying means and the thermal resistance between the power amplifying means and the portion where the temperature is detected by the temperature detecting means is generated. To The difference is caused, the transmission output is to be varied.

Therefore, as a countermeasure against this, in adjusting the transmission output of the high-power transmitting apparatus, in order to stabilize the transmission output after operating the power amplifying means, the temperature inside the power amplifying means and the temperature detecting means must be adjusted. It is necessary to wait until the temperature difference between the temperature to be detected and the temperature to be detected becomes constant, and it takes time to adjust the temperature.

SUMMARY OF THE INVENTION An object of the present invention is to provide an excellent high-power transmitting apparatus in which the fluctuation range of the transmission output is small, in order to solve the above-mentioned problems.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a heat radiator having a power amplifying means attached thereto.
Or, a temperature detecting means for detecting an ambient temperature of the power amplifying means, a temperature difference estimating means for estimating a temperature difference between the temperature detected by the temperature detecting means and a temperature inside the power amplifying means, and a temperature detecting means for detecting the temperature difference. The temperature compensating means includes a temperature compensating means for compensating for the temperature difference estimated by the temperature difference estimating means, and an output compensating means for compensating the transmission output based on the temperature after the temperature compensating means has compensated.

Therefore, based on the temperature detected by the temperature detecting means and the amount of heat generated by the power amplifying means, the internal temperature of the power amplifying means is estimated, and the transmission output is corrected using the estimated temperature. Can be made smaller.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in the claims of the present invention
Temperature of the temperature detection means for detecting the ambient temperature T ₀ of the radiator temperature or power amplifying means mounted power amplifying means, and the temperature T _AMP inside temperature T ₀ and a power amplifier for the temperature detection means detects Temperature difference estimating means for estimating the difference, temperature correcting means for correcting the temperature difference T _D estimated by the temperature difference estimating means to the temperature T ₀ detected by the temperature detecting means, and after the temperature correcting means makes a correction. Output correction means for correcting the transmission output based on the temperature T _OUT .

Accordingly, the temperature detecting means detects the temperature of the radiator to which the power amplifying means is attached or the ambient temperature of the power amplifying means, and the temperature difference estimating means detects the temperature T _AMP inside the power amplifying means.
The temperature difference between the temperature and the temperature T ₀ detected by the temperature detecting means is determined by the power consumed by the power amplifying means, the thermal resistance between the power amplifying means and the part where the temperature detecting means detects the temperature, calculated in approximation from the operating conditions calculated, and the temperature T ₀ of the temperature correction means temperature detecting means detects, by adding the temperature difference T _D the temperature difference estimating means has calculating the estimated value of the internal temperature of the power amplifier means The output amplifying means then controls the power amplifying means based on the temperature T _OUT obtained by the temperature correcting means so that the transmission output of the power amplifying means becomes constant.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 1 shows a high power transmitting apparatus showing a configuration of an embodiment of the present invention. In the high power transmission apparatus shown in FIG. 1, reference numeral 10 denotes a transmission signal generation unit for generating a modulated signal to be transmitted, and reference numeral 11 denotes power amplification for amplifying the transmission signal generated by the transmission signal generation unit 10 to a specified transmission output. Means 12, an antenna for transmitting the transmission signal amplified by the power amplifying means 11, 13 a temperature detecting means for detecting the temperature of the radiator to which the power amplifying means 11 is attached, or the ambient temperature of the power amplifying means 11, 14 A temperature difference estimating means for estimating a temperature difference between the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 and calculating by approximation calculation, and 15 is a temperature T ₀ detected by the temperature detecting means 13 Temperature correction means for adding the temperature difference T _D calculated by the
Reference numeral 6 denotes output correction means for correcting the transmission output of the power amplification means 11 based on the temperature T _OUT obtained by the temperature correction means 15 so as to keep the transmission output constant, and 17 denotes control means for controlling the entire high power transmission apparatus. is there.

Next, the operation of the above embodiment will be described with reference to FIGS. FIG. 2 shows a change in the ambient temperature of the large power transmission device, a change in the temperature T ₀ detected by the temperature detecting means 13 due to the operation state of the power amplifying means 11, and a change in the temperature T _AMP inside the power amplifying means 11. It is a modeled graph. FIG. 3 is a graph showing the temperature difference between the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 from FIG.

When the power amplifying means 11 starts power amplifying control of the transmission signal generated by the transmission signal generating means 10 according to an instruction from the high power transmitting apparatus control means 17, the temperature T _AMP , The temperature T ₀ detected by the temperature detecting means 13 increases with time and eventually saturates at a certain temperature (a temperature sensing resistor or a thermocouple can be used as the temperature detecting means 13. The temperature of the temperature detection target is detected based on a change in the characteristics of the resistance and the thermocouple.)

At this time, the temperature difference between the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 also increases with time, and finally saturates at T _DMAX .
T _DMAX is the power W consumed inside the power amplification means 11.
And the product of the thermal resistance R between the power amplifying unit 11 and the part where the temperature is detected by the temperature detecting unit 13 (TDMAX = W × R).

When the power amplification means 11 stops power amplification of the transmission signal generated by the transmission signal generation means 10 according to an instruction from the high power transmission device control means 17, or in response to an instruction from the high power transmission device control means 17 , The transmission signal generation means 10 stops generating the transmission signal and the power amplification means 11
Does not perform power amplification, the temperature T _AMP inside the power amplification unit 11 and the temperature T ₀ detected by the temperature detection unit 13 decrease with time, and finally become equal to the ambient temperature of the large power transmission device.

At this time, the temperature T inside the power amplifying means 11
The temperature difference between the _AMP and the temperature T ₀ detected by the temperature detecting means 13 also decreases with time and eventually becomes zero. The temperature difference estimating means 14 models the change in the temperature difference between the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 due to the operation of the power amplifying means 11. The temperature difference between the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 can be estimated or calculated by an approximate calculation. As an example of this approximation value calculation, the calculation is performed using the models shown in the graphs of FIGS.

When the power amplifying means 11 starts power amplification, the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 rise at a constant rate, respectively, and the high power transmitting apparatus Are saturated at the same time when the respective temperature rises with respect to the ambient temperature.

Next, when the power amplification unit 11 stops power amplification, the temperature T ₀ detected by the temperature detection unit 13 decreases at a fixed rate, and finally becomes equal to the ambient temperature of the large power transmission device. At this time, the temperature T _AMP inside of the power amplifier means 11 and the temperature lowered at a constant rate, it becomes a temperature equal to the temperature T ₀ of detecting temperature detecting means 13 is equal to the temperature T ₀ of detecting temperature detecting means 13 since The temperature changes (see FIG. 2).

FIG. 3 shows the temperature difference T _D between the temperature T _AMP inside the power amplifying means 11 and the temperature T ₀ detected by the temperature detecting means 13 from the graph of FIG. When the power amplification means 11 starts power amplification, the temperature difference T _D increases at a constant rate and saturates at T _DMAX . When the power amplification means 11 stops power amplification, the temperature difference TD decreases at a fixed rate and finally becomes zero. If the relationship shown in the graph of FIG. 3 is used, the temperature difference T _D when the power amplifying unit 11 performs power amplification can be obtained by Expression (1).

[0021]

## EQU1 ## _Ton is the temperature difference T _D when the power amplification means 11 starts power amplification, dT _on is the rate of increase of the temperature difference T _D ,
t _on is the elapsed time from when the power amplification means 11 starts power amplification. The temperature difference T _D when the power amplifying unit 11 stops power amplification is obtained by the equation (2).

[0022]

## EQU2 ## T _off is the temperature difference T _D when the power amplification means 11 stops power amplification, dT _off is the rate of decrease of the temperature difference T _D , and t _off is the time when the power amplification means 11 stops power amplification. This is the elapsed time since The above-described approximate calculation of the temperature difference T _D can be performed discretely by digital processing.
It can be determined by dT _on and dT _off experiments. Request estimate of the temperature of the interior of the power amplifier means 11 performs addition of the temperature difference T _D the temperature T ₀ and the temperature difference estimation unit 14 calculates the temperature detecting means 13 detects the temperature correction means 15. Using the temperature T _out obtained by the temperature correction means 15, the transmission output of the power amplification means 11 is corrected by the output correction means 17 to reduce the fluctuation range of the transmission output.

As a method of correcting the transmission output, the output power of the transmission signal generating means 10 is corrected, and the power amplifying means 11
The input power of the power amplifier 11 may be changed, or the power amplifier 11 may be corrected to change the gain of the power amplifier 11.

With such a configuration, the fluctuation range of the transmission output of the high power transmission device can be reduced.

[0025]

As described above, according to the present invention, the temperature difference estimating means uses the temperature inside the power amplifying means and the temperature detecting means based on the temperature detected by the temperature detecting means and the operating condition of the power amplifying means. Guess the temperature difference between the detected temperatures, the temperature correcting means estimates the temperature inside the power amplifying means, and the output correcting means based on this temperature makes the fluctuation of the transmission output of the high power transmitting device small. Since the correction is performed, there is an effect that the fluctuation range of the output can be suppressed to be smaller than that of the high power transmitting apparatus having no temperature difference estimating means.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a high power transmission device according to an embodiment of the present invention.

FIG. 2 is a graph showing a model of a relationship among an ambient temperature of a high-power transmission device, a temperature detected by a temperature detection unit, and a temperature inside a power amplification unit according to the embodiment of the present invention.

FIG. 3 is a graph showing a model of a temperature difference between the temperature inside the power amplifying unit and the temperature detected by the temperature detecting unit in the embodiment of the present invention.

[Explanation of symbols]

 11 Power amplifying means 13 Temperature detecting means 14 Temperature difference estimating means 15 Temperature correcting means 16 Output correcting means Documents describing chemical formulas etc.

(Equation 1)

(Equation 2)

Claims (1)

[Claims] A temperature detecting means for detecting a temperature of a radiator to which the power amplifying means is attached or an ambient temperature of the power amplifying means;
A temperature difference estimating means for estimating a temperature difference between the temperature detected by the temperature detecting means and a temperature inside the power amplifying means; and correcting the temperature difference estimated by the temperature difference estimating means to the temperature detected by the temperature detecting means. A high-power transmitting apparatus comprising: a temperature correcting unit; and an output correcting unit that corrects a transmission output based on the temperature after the temperature correcting unit has corrected the temperature.