WO2016185515A1

WO2016185515A1 - Control device and wireless module

Info

Publication number: WO2016185515A1
Application number: PCT/JP2015/064036
Authority: WO
Inventors: 聡平海野; 真吾柳本
Original assignee: 株式会社東芝
Priority date: 2015-05-15
Filing date: 2015-05-15
Publication date: 2016-11-24

Abstract

According to an embodiment of the present invention, a control device has a wireless module, a first temperature sensor, and a control unit. The wireless module has an electromagnetic wave generating unit that generates electromagnetic waves for performing wireless communication, and a communication control unit that controls the electromagnetic wave generating unit. The first temperature sensor is disposed close to the control unit that controls the wireless module, and outputs to the control unit a signal indicating a detected temperature. The control unit communicates with an external device via the wireless module, and on the basis of information obtained by means of the communication, controls a subject to be controlled, said control unit transmitting, on the basis of the signal inputted from the first temperature sensor, the signal indicating the temperature to the communication control unit of the wireless module. On the basis of the signal received from the control unit, the communication control unit of the wireless module controls the intensity of the electromagnetic waves to be generated by the electromagnetic wave generating unit.

Description

Control device and wireless module

Embodiments described herein relate generally to a control device and a wireless module.

2. Description of the Related Art Conventionally, in a control device that includes a CPU (Central Processing Unit) that integrally controls its own device and a communication module that communicates with other devices, an MCU (Micro Control) In some cases, the unit) has adjusted the radio wave transmission output by controlling the RF-IC (Radio-Frequency-Integrated-Circuit). In this case, since the temperature sensor is provided in the communication module, the apparatus itself may be increased in size or cost may be increased.

US Pat. No. 7,925,459 US Pat. No. 8,359,176

The problem to be solved by the present invention is to provide a control device and a wireless module that can output a radio wave having a desired transmission output with a simpler configuration.

The control device of the embodiment includes a wireless module, a first temperature sensor, and a control unit. The wireless module includes a radio wave generation unit that generates radio waves for performing wireless communication, and a communication control unit that controls the radio wave generation unit. The first temperature sensor is disposed in the vicinity of the control unit that controls the wireless module, and outputs a signal indicating the detected temperature to the control unit. The control unit is a control unit that communicates with an external device via the wireless module and controls a control target based on information obtained by communication, and based on a signal input from the first temperature sensor Then, a signal indicating the temperature is transmitted to the communication control unit of the wireless module. The communication control unit of the wireless module controls the intensity of the radio wave generated by the radio wave generation unit based on the signal received from the control unit.

The figure which shows the structure of the inverter system 1 of 1st Embodiment. The figure which shows the structure of the inverter unit 20 of 1st Embodiment in detail. The flowchart which shows the flow of the process performed by MCU36 of 1st Embodiment. The figure for demonstrating the restriction | limiting of the transmission output of the electromagnetic wave radiated | emitted from the antenna 32 of the radio | wireless module 30. FIG. The flowchart which shows the flow of the process which MCU36 of 2nd Embodiment performs. The figure for demonstrating the restriction | limiting of the transmission output of the electromagnetic wave radiated | emitted from the antenna 32 of the wireless module 30 of 2nd Embodiment. The figure which shows the structure of 20 A of inverter units of 3rd Embodiment in detail.

Hereinafter, the control device and the wireless module of the embodiment will be described with reference to the drawings. In the following embodiments, a control device will be described as an example that controls an inverter unit that converts electric power supplied from a DC power source into AC.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration of an inverter system 1 according to the first embodiment. The inverter system 1 of the first embodiment includes a central control device 10 and a plurality of inverter units 20-1 to 20-n. DC power sources 100-1 to 100-n are connected to the inverter units 20-1 to 20-n, respectively. Hereinafter, when the plurality of inverter units 20-1 to 20-n are not distinguished, they are simply referred to as the inverter unit 20. Further, when the DC power supplies 100-1 to 100-n are not distinguished, they are simply expressed as the DC power supply 100.

Each inverter unit 20 converts DC power generated by the DC power source 100 into AC power and outputs the AC power to the power line 2 connected to a system power source (not shown). Thereby, the inverter system 1 links the plurality of DC power supplies 100 and the system power supply to supply AC power to a load (not shown) connected to the power line 2. Each inverter unit 20 transmits the operating state of the inverter unit 20 itself, information held by the inverter unit 20, and the like to the central control device 10.

DC power supply 100 generates DC power and supplies it to inverter unit 20. The DC power supply 100 is a solar cell panel, for example. Each DC power source 100 is, for example, one solar cell panel among a plurality of solar cell panels installed on the roof of a house. In the present embodiment, a solar cell panel is illustrated as the DC power source 100, but the DC power source 100 is not limited to the solar cell panel, and may be another type of DC power source such as a fuel cell. In addition, although one inverter unit 20 is provided for the DC power supply 100, the present invention is not limited to this, and one inverter unit 20 may be provided for a plurality of DC power supplies 100, A plurality of inverter units 20 may be provided for the DC power supply 100.

The central control device 10 includes a wireless communication unit 12, a network communication unit 14, a central control unit 15, and a display unit 16. The wireless communication unit 12 is a communication interface for performing wireless communication with the inverter unit 20. For example, communication using the low-power wireless 920 [MHz] band is performed between the wireless communication unit 12 and the wireless module 30 of the inverter unit 20. The network communication unit 14 is a communication interface for connecting to the network NW. The network NW is, for example, a WAN (Wide Area Network) or a LAN (Local Area Network).

The central control unit 15 centrally controls the plurality of inverter units 20 based on the information received by the wireless communication unit 12. The central control unit 15 controls the operating state (operation or stop) of the inverter unit 20, the amount of AC power output from the inverter unit 20, and the like. The display unit 16 is a display device such as an LED digital display unit having a plurality of segments, an LCD (Liquid Crystal Display), an organic EL (Electroluminescence), or the like. The display unit 16 displays the state of control by the central control unit 15 and the like.

FIG. 2 is a diagram showing the configuration of the inverter unit 20 of the first embodiment in more detail. The inverter unit 20 includes a wireless module 30, a CPU (Central Processing Unit) 40, a first temperature sensor 42, and a conversion device 50. The CPU 40 is an example of a “control unit”.

The wireless module 30 of the inverter unit 20 includes an antenna 32, an RF-IC 34, and an MCU 36. The antenna 32 radiates a radio wave on which transmission contents are superimposed in the air and outputs the received radio wave to the RF-IC 34. The RF-IC 34 performs modulation and power amplification to generate a radio wave on which the transmission content instructed from the MCU 36 is superimposed, and radiates the generated radio wave to the antenna 32. The RF-IC 34 demodulates the radio wave received by the antenna 32, generates a signal corresponding to the received radio wave, and outputs the signal to the MCU 36. The MCU 36 controls the RF-IC 34 based on the information (transmission contents) received from the CPU 40 to radiate a desired radio wave to the antenna 32. Further, the MCU 36 acquires a signal corresponding to the radio wave received by the antenna 32 from the RF-IC 34, and transmits information based on the acquired signal to the CPU 40.

The CPU 40 controls the conversion device 50 and transfers a signal input from the first temperature sensor 42 to the wireless module 30 to assist the correction process in the wireless module 30. This will be described later.

The conversion device 50 includes, for example, an inverter, a drive unit, etc. (not shown). The inverter includes a plurality of switching elements, and converts DC power into AC power by performing on / off control of the switching elements based on a gate control signal output by the drive unit. The drive unit includes a PWM (Pulse Width Modulation) control unit, a gate drive unit, and the like. The PWM control unit calculates the on / off time of the switching element based on the signal input from the CPU 40. The PWM control unit generates a PWM signal based on the calculated on / off time, and outputs the PWM signal to the gate drive unit. The gate drive unit turns each switching element on and off based on the PWM signal generated by the PWM control unit.

The CPU 40 performs various controls as follows. The CPU 40 detects the frequency of the AC power output from the inverter unit 20, and calculates the advance amount or delay amount of the phase angle based on the relationship between the detected frequency and the rated frequency. Further, the CPU 40 changes the phase angle of the AC voltage supplied to the load by controlling the conversion device 50 based on the calculated advance amount or delay amount of the phase angle. Further, the CPU 40 supplies the wireless module 30 with the amount of direct current power supplied from the direct current power source 100, the amount of alternating current power obtained by converting the direct current power into alternating current power, information indicating the operation state or the stop state of the own device, and the like. And transmitted to the centralized control device 10.

The first temperature sensor 42 is installed in the vicinity of the CPU 40 on the same substrate as the substrate on which the CPU 40 is disposed. “Nearby” means a positional relationship such that it can be equated with the temperature of the CPU 40, for example, that the interval is within about 1 [cm]. Further, “near” includes being installed in contact with the CPU 40. The first temperature sensor 42 is a thermistor, for example. The first temperature sensor 42 outputs a signal indicating the detected temperature to the CPU 40.

The CPU 40 transmits a signal indicating the temperature to the wireless module 30 based on the temperature indicated by the signal input from the first temperature sensor 42. The CPU 40 may directly transfer the signal input from the first temperature sensor 42 to the wireless module 30, or the signal input from the first temperature sensor 42 may be in a format suitable for communication with the wireless module 30. It may be converted into and transmitted to the wireless module 30. The CPU 40 transmits a signal indicating temperature to the wireless module 30 at a predetermined cycle, for example.

Hereinafter, correction processing by the MCU 36 will be described. FIG. 3 is a flowchart showing a flow of processing executed by the MCU 36 of the first embodiment. First, the MCU 36 receives a signal indicating the temperature detected by the first temperature sensor 42 from the CPU 40 (step S100). Next, the MCU 36 determines whether or not the temperature obtained from the signal indicating the temperature received in step S100 is equal to or lower than the predetermined temperature T1 (step S102).

When the temperature obtained from the signal indicating the temperature received in step S100 is not equal to or lower than the predetermined temperature T1 (when the temperature exceeds the predetermined temperature T1), the MCU 36 causes the RF-IC 34 to generate a radio wave and the generated radio wave to the antenna 32. Radiate (step S106). In the first embodiment, when the MCU 36 obtains a negative determination in step S102, the MCU 36 generates the maximum output radio wave that can be output by the wireless module 30 in the RF-IC 34, and radiates the generated radio wave to the antenna 32. Shall be allowed to.

On the other hand, when the temperature obtained from the signal indicating the temperature received in step S100 is equal to or lower than the predetermined temperature T1, the MCU 36 determines that the transmission output (intensity) of the radio wave radiated from the antenna 32 is equal to or lower than the upper limit value. Control the IC 34 (step S104). Next, the MCU 36 causes the RF-IC 34 to generate a radio wave and radiate the radio wave generated by the antenna 32 based on the process of step S104 (step S106). Thereby, the processing of this flowchart is completed.

FIG. 4 is a diagram for explaining the limitation on the transmission output of the radio wave radiated from the antenna 32 of the wireless module 30. In the figure, the vertical axis represents the transmission output of radio waves radiated from the antenna 32, and the horizontal axis represents the temperature around the wireless module 30 or the CPU 40. In the drawing, the transition line Tr indicates the relationship between the transmission output of the radio wave radiated from the wireless module 30 and the temperature around the wireless module 30. As shown in the figure, when the temperature around the wireless module 30 decreases, the transmission output of radio waves radiated by the wireless module 30 tends to increase even if the output set in the RF-IC 34 is constant. Here, depending on the installation area of the inverter system 1, when a communication band such as the 920 [MHz] band is used, it is necessary to limit the radio wave transmission output to 20 [mW] or less. For this reason, it is preferable that the MCU 36 sets the transmission output slightly lower than that (for example, 19.5 [mW]) as the upper limit value and limits the radio wave transmission output to the upper limit value or less.

Here, the temperature at which the transition line Tr intersects the upper limit value (zero degree in FIG. 4) can be considered as the threshold value. However, since the inverter system 1 does not include a temperature sensor that detects the temperature around the wireless module 30, it may not be appropriate to set the temperature at which the transition line Tr intersects the upper limit value as a threshold (predetermined temperature). The control line Tr1 in FIG. 4 is a control line when the transition line Tr intersects the upper limit value as a threshold value.

In the first embodiment, a first temperature sensor 42 that outputs a signal indicating the detected temperature to the CPU 40 is provided. The temperature detected by the first temperature sensor 42 tends to be different from the temperature around the wireless module 30. For example, the temperature detected by the first temperature sensor 42 may tend to be higher than the temperature detected by the temperature sensor that detects the temperature around the wireless module 30 due to heat generated by the CPU 40 or the like. Therefore, the MPU 36 according to the first embodiment performs transmission output restriction control by offsetting the threshold value for temperature to the high temperature side. Specifically, the MPU 36 shifts the threshold value for temperature to a higher temperature side (for example, T1) than the temperature corresponding to the intersection of the transition line Tr and the upper limit value. As a result, it is possible to absorb the deviation of the actual temperature caused by the location where the temperature sensor is attached. The control line Tr2 in FIG. 4 is a preferable control line when the threshold value T1 for temperature is shifted to the high temperature side.

Note that communication using the 2.4 [GHz] band may be performed between the wireless communication unit 12 and the wireless module 30 of the inverter unit 20. Further, the CPU 40 may transmit a signal for causing the RF-IC 34 to execute transmission output restriction control to the MCU 36 based on the temperature detected by the first temperature sensor 42.

According to the control device of the first embodiment described above, the first temperature sensor 42 is disposed in the vicinity of the CPU 40, and the CPU 40 outputs a signal indicating the temperature based on the signal input from the first temperature sensor 42. Since the control is performed to limit the intensity of the radio wave generated by the RF-IC 34 based on the temperature obtained from the signal received by the MCU 36 and transmitted to the MCU 36 of the wireless module 30, a desired transmission output can be obtained with a simpler configuration. Radio waves can be output.

(Second Embodiment)
Hereinafter, the second embodiment will be described. Here, the difference from the first embodiment will be mainly described, and description of functions and the like common to the first embodiment will be omitted. In the second embodiment, the MCU 36 controls the RF-IC 34 so that the transmission output of the radio wave radiated to the antennan 32 is constant based on the signal indicating the temperature detected by the first temperature sensor 42. .

FIG. 5 is a flowchart showing a flow of processing executed by the MCU 36 of the second embodiment. First, the MCU 36 receives a signal indicating the temperature detected by the first temperature sensor 42 from the CPU 40 (step S200). Next, the MCU 36 determines whether or not the temperature obtained from the signal indicating the temperature received in step S200 is equal to or lower than the predetermined temperature T2 (step S202).

When the temperature obtained from the signal indicating the temperature received in step S200 is equal to or lower than the predetermined temperature T2, the MCU 36 controls the RF-IC 34 so as to reduce the transmission output of the radio wave radiated from the antenna 32 (step S204). . When the temperature obtained from the signal indicating the temperature received in step S200 is not equal to or lower than the predetermined temperature T2 (when the temperature exceeds the predetermined temperature T2), the MCU 36 increases the RF-IC 34 so as to increase the transmission output of the radio wave radiated from the antenna 32. Is controlled (step S206). Next, the MCU 36 causes the RF-IC 34 to generate radio waves and radiate the radio waves generated from the antenna 32 based on the processing of step S204 or step S206 (step S208). Thereby, the processing of this flowchart is completed.

FIG. 6 is a diagram for explaining the limitation on the transmission output of radio waves radiated from the antenna 32 of the wireless module 30 according to the second embodiment. In the figure, TA indicates the target value of the transmission output of the radiated radio wave. In the drawing, a transition line Tr indicates a transmission output of radio waves that are output when the MCU 36 applies a certain amount of power to the RF-IC 34. As shown in the flowchart of FIG. 5, the control line Tr3 is controlled so as to decrease the transmission output when the temperature is equal to or lower than the predetermined temperature T2, and the control line when the transmission output is controlled to increase when the temperature exceeds the predetermined temperature T2. It is. Here, as described in the first embodiment, the predetermined temperature T2 is a temperature shifted to a higher temperature side than the temperature at which the transition line Tr intersects the predetermined temperature. For this reason, as indicated by the control line Tr3, the transmission output appears to be lower than TA, but in actuality, the transmission output is controlled to approach TA due to temperature deviation. A transition line Tr4 indicates the result when control is performed using the control line Tr3. As a result, the MCU 36 can cause the antenna 32 to emit a radio wave having a transmission output that matches the target value.

According to the control device of the second embodiment described above, the first temperature sensor 42 is disposed in the vicinity of the CPU 40, and the CPU 40 outputs a signal indicating the temperature based on the signal input from the first temperature sensor 42. In order to control the intensity of the radio wave transmitted to the MCU 36 of the wireless module 30 and generated by the RF-IC 34 based on the temperature obtained from the signal received by the MCU 36, the radio wave having a desired transmission output is output with a simpler configuration. be able to.

(Third embodiment)
Hereinafter, a third embodiment will be described. Here, the difference from the first embodiment will be mainly described, and description of functions and the like common to the first embodiment will be omitted. In the third embodiment, the MCU 36 controls the transmission output of radio waves radiated from the antenna 32 based on the temperature detected by the second temperature sensor 44 provided in the inverter unit 20A.

FIG. 7 is a diagram showing in more detail the configuration of the inverter unit 20A of the third embodiment. The inverter unit 20 </ b> A of the third embodiment includes a second temperature sensor 44 in addition to the first temperature sensor 42. For example, the second temperature sensor 44 is disposed on a substrate on which the CPU 40 of the inverter unit 20A, the conversion device 50, and the first temperature sensor 42 are disposed. For example, the second temperature sensor 44 is disposed at an end or corner on the substrate on which the CPU 40 of the inverter unit 20A, the conversion device 50, and the first temperature sensor 42 are disposed. The second temperature sensor 44 is disposed at a position farther from the first temperature sensor 42 with respect to the CPU 40, for example. Further, the second temperature sensor 44 may be disposed, for example, in the vicinity of the region A1 or the region A2 in the drawing.

The CPU 40 transmits a signal indicating the temperature detected by the second temperature sensor 44 to the MCU 36. The MCU 36 receives the signal indicating the temperature transmitted from the CPU 40 and controls the transmission output of the radio wave generated by the RF-IC 34 based on the received signal. Since the second temperature sensor 44 is farther from the CPU 40 than the first temperature sensor 42, the second temperature sensor 44 is less susceptible to temperature changes caused by heat generated by the CPU 40. Thereby, the MCU 36 can radiate the radio wave of a desired transmission output to the antenna 32 with higher accuracy.

According to the control device of the third embodiment described above, the CPU 40 transmits a signal indicating the temperature detected by the second temperature sensor 44 located far from the first temperature sensor 42 to the CPU 40. The intensity of the radio wave generated by the RF-IC 34 is controlled based on the signal transmitted to the MCU 36 and received by the MCU 36. Thereby, the radio wave of a desired transmission output may be able to be output with higher accuracy.

(Fourth embodiment)
Hereinafter, a fourth embodiment will be described. Here, the description will focus on differences from the third embodiment, and descriptions of functions and the like common to the third embodiment will be omitted. A configuration diagram of the inverter unit 20 according to the fourth embodiment will be described with reference to FIG. In the fourth embodiment, the CPU 40 refers to both the signal input by the first temperature sensor 42 and the signal input by the second temperature sensor 44, and sends a signal indicating the temperature to the MCU 36. Send.

The CPU 40 is a signal indicating a lower temperature among the temperature obtained from the signal indicating the temperature input by the first temperature sensor 42 and the temperature acquired from the signal indicating the temperature input by the second temperature sensor 44. Is transmitted to the MCU 36. Thereby, the MCU 36 can control the RF-IC 34 based on the temperature detected by the second temperature sensor 44 that is not easily affected by the temperature change caused by the heat generation of the CPU 40. As a result, a radio wave having a desired transmission output can be radiated to the antenna 32 with higher accuracy.

According to the control device of the fourth embodiment described above, the CPU 40 calculates the temperature obtained from the signal indicating the temperature input by the first temperature sensor 42 and the temperature input by the second temperature sensor 44. Of the temperatures obtained from the indicated signal, a signal indicating a lower temperature is transmitted to the MCU 36, and the MCU 36 controls the transmission output of the radio wave generated by the RF-IC 34 based on the received signal. Thereby, it is possible to output a radio wave having a desired transmission output with higher accuracy.

(Fifth embodiment)
The fifth embodiment will be described below. Here, the description will focus on differences from the third embodiment, and descriptions of functions and the like common to the third embodiment will be omitted. A configuration diagram of the inverter unit 20 of the fifth embodiment will be described with reference to FIG. In the fifth embodiment, the CPU 40 transmits both the signal input by the first temperature sensor 42 and the signal input by the second temperature sensor 44 to the MCU 36. The MCU 36 refers to both of these signals and controls the transmission output of the radio wave generated by the RF-IC 34.

The MCU 36 receives a signal indicating the temperature detected by the first temperature sensor 42 and a signal indicating the temperature detected by the second temperature sensor 44 from the CPU 40. The MCU 36 has a lower temperature between the temperature obtained from the received signal indicating the temperature detected by the first temperature sensor 42 and the temperature obtained from the received signal indicating the temperature detected by the second temperature sensor 44. Select the temperature. As a result, the MCU 36 can control the RF-IC 34 based on a signal indicating the temperature detected by the temperature sensor that is not easily affected by the temperature change caused by the heat generation of the CPU 40. As a result, similarly to the fourth embodiment, it is possible to output a radio wave having a desired transmission output with higher accuracy.

According to the control device of the fifth embodiment described above, the CPU 40 outputs a signal indicating the temperature input by the first temperature sensor 42 and a signal indicating the temperature input by the second temperature sensor 44. The MCU 36 controls the transmission output of radio waves generated by the RF-IC 34 based on the lower temperature obtained from the received signal. Thereby, it is possible to output a radio wave having a desired transmission output with higher accuracy.

Further, the CPU 40 transmits an average value or a weighted average value of the temperature detected by the first temperature sensor 42 and the temperature detected by the second temperature sensor 44 to the MCU 36, and the MCU 36 has received it. The RF-IC 34 may be controlled based on the value.

Further, the CPU 40 transmits both the temperature detected by the first temperature sensor 42 and the temperature detected by the second temperature sensor 44 to the MCU 36, and the MCU 36 receives the first temperature sensor received from the CPU 40. The RF-IC 34 may be controlled based on the average value of the temperature detected by 42 and the temperature detected by the second temperature sensor 44, or a weighted average value.

According to at least one embodiment described above, a radio module (30) having a radio wave generator (34) that generates radio waves for performing wireless communication, and a communication controller (36) that controls the radio wave generators; A first temperature sensor (42) disposed near the control unit (40) for controlling the wireless module and outputting a signal indicating the detected temperature to the control unit, and communicates with the external device via the wireless module A control unit that controls a control target based on the information obtained by the control unit, wherein the control unit transmits a signal indicating the temperature to the communication control unit of the wireless module based on the signal input from the first temperature sensor; The communication control unit of the wireless module controls the intensity of the radio wave generated by the radio wave generation unit based on the signal received from the control unit. Can output a radio wave transmission output.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

Claims

A radio module having a radio wave generator for generating radio waves for wireless communication, and a communication controller for controlling the radio wave generator;
A first temperature sensor disposed near a control unit for controlling the wireless module and outputting a signal indicating the detected temperature to the control unit;
A control unit that communicates with an external device via the wireless module and controls a control target based on information obtained by communication, and indicates a temperature based on a signal input from the first temperature sensor A control unit that transmits a signal to the communication control unit of the wireless module,
The communication control unit of the wireless module controls the intensity of the radio wave generated by the radio wave generation unit based on the signal received from the control unit.
Control device.
The first temperature sensor is disposed on the same substrate as the substrate on which the control unit is disposed.
The control device according to claim 1.
A signal is output on the same substrate as the substrate on which the control unit is disposed, and is positioned farther than the first temperature sensor with respect to the control unit, and outputs a signal indicating the detected temperature to the control unit. 2 temperature sensors,
The controller controls communication of the wireless module based on one or both of a signal input from the first temperature sensor and a signal input from the second temperature sensor. Send to the department,
The control device according to claim 2.
The control unit outputs a signal indicating a lower temperature out of a temperature obtained from a signal input from the first temperature sensor and a temperature obtained from a signal input from the second temperature sensor, to the wireless module. To the communication controller of
The control device according to claim 3.
The communication control unit limits the intensity of the radio wave generated by the radio wave generation unit as the temperature indicated by the signal received from the control unit is lower.
The control device according to claim 1.
The communication control unit limits the intensity of the radio wave generated by the radio wave generation unit when the temperature indicated by the signal received from the control unit is equal to or lower than a predetermined temperature.
The control device according to claim 1.
The control object includes a conversion device that converts direct current into alternating current,
The control unit communicates with an external device via the wireless module, and controls the operation of the conversion device based on information obtained by communication.
The control device according to claim 1.
A radio wave generator for generating radio waves for wireless communication;
A communication control unit that controls the radio wave generation unit, receives a signal indicating temperature from the control unit that communicates with its own device, and generates a radio wave generated by the radio wave generation unit based on the temperature indicated by the received signal A communication control unit for controlling the intensity of
A wireless module comprising:
The communication control unit limits the intensity of the radio wave generated by the radio wave generation unit as the temperature indicated by the signal received from the control unit is lower.
The wireless module according to claim 8.
The communication control unit limits the intensity of the radio wave generated by the radio wave generation unit when the temperature indicated by the signal received from the control unit is equal to or lower than a predetermined temperature.
The wireless module according to claim 8.