JPS58131838A - Transmission and reception method of power transmission and signal - Google Patents

Abstract

PURPOSE:To attain power transmission and signal transmission/reception with a simple circuit, by transmitting power with a non-sinusoidal wave and superimposing a signal wave in synchronizing with the non-sinusoidal wave. CONSTITUTION:A clock from a clock pulse oscillator 4 of a power feeding section 1 is converted in an AC power of a rectangular wave having a prescribed power supply frequency via a frequency divider 5 and an inverter 6 and transmitted to a power supplied section 2 via a synthesis and separation circuit 7 and a transmission line 3. A transmission modulation circuit 8 forms an information signal representing the state of a contact group 10 in synchronizing with a clock of the oscillator 4 and is trnasmitted by being superimposed on a positive half cycle of a power supply rectangular wave. A synthesis and separation circuit 13 of the section 12 gives a power rectangular wave to a rectifying and stabilizing circuit 14 and the information signal to a synchronizing oscillator 15 and a reception demodulating circuit 16. The circuit 16 demodulates the information signal with a reproduction clock of the oscillator 15. A transmission modulating circuit 17 forms the information signal to be transmitted in synchronizing with the said reproduction clock and transmits it by being superimposed on a negative half cycle of the power supply rectangular wave.

Description

Detailed Description of the Invention The present invention transmits power using a non-sinusoidal wave, and superimposes a signal on the power transmission wave using the same transmission path.
The present invention relates to power transmission for transmitting and receiving signals and a method for transmitting and receiving signals.

BACKGROUND ART Electric power companies and the like are already conducting communications using power transmission lines to transmit power to places without power and to send and receive signals using the transmission lines. However, in this type of wired communication, the sending and receiving sides are not synchronized, so there is a problem in that it is not possible to send many signals at once.

On the other hand, when a sine wave is used for power transmission, the maximum voltage is higher than that of a non-sinusoidal wave such as a square wave, so the transmission line must have a high withstand voltage, and heat loss also increases.
A circuit that generates a sine wave without using a rotating machine has the problem of a complicated circuit configuration and poor conversion efficiency.

This invention focuses on the point in "u" and transmits power using a non-sinusoidal wave, and also transmits and receives signals by superimposing a signal wave synchronized with this transmission wave, thereby transmitting power using many signal waves. It can be superimposed on waves and sent reliably, and
It is an object of the present invention to provide a power transmission and signal transmission/reception method in which a transmission/reception circuit can be configured relatively easily. To this end, the present invention provides a method for simultaneously transmitting and receiving signals while transmitting power from one side to the other using a power transmission line, in which time-sharing is performed using a non-sinusoidal power transmission wave formed by an inverter or the like. The gist is that the system is configured so that multiplexed signals or frequency division multiplexed signals are superimposed and the signals are sent and received using a power transmission path.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a power transmission line 3 used to superimpose a time-division multiplexed signal on a power transmission wave to transmit and receive signals from a power supply section that supplies power to a power supply section 2 that receives it. A block diagram of a transmission circuit is shown. As the power transmission wave used here, a square wave is used in consideration of low heat loss and simplification of the circuit. First, the power supply section is installed.
J] To explain from the above circuit, lI is a clock pulse oscillator, and S is a frequency divider, which divides the clock signal to create a low frequency signal of several tens to several kflz used for power transmission and applies it to the inverter B. I'm trying to connect to it. 7
Then, a time-division multiplexed signal sent from a transmission modulation circuit g, which will be described later, is superimposed on a power transmission wave of a predetermined frequency generated by an inverter B, and then a power-supplied part! This is a synthesis/separation circuit that receives signals sent from and separates them. The transmission modulation circuit inputs a timing pulse for transmission that cannot be sent from the clock pulse oscillation 5<z.1 Based on this timing pulse, a time division signal is created and synthesized according to the state of the switch section 10 provided in the power supply section. The signal is connected to be sent to the separation circuit 7. 9 is a reception demodulation circuit,
A timing pulse for reception is manually generated from a clock pulse oscillator, and a pulse signal sent from the power-fed unit 2 is received via a synthesis/separation circuit 7, and the transmitted pulse signal is separated and identified based on the timing pulse, It is connected to send a fidget drive signal to the actuator unit /l. The actuator section ll is, for example, an actuating device installed on the power supply section/side, and is a switch section 1 of the power supply section 2.
It is activated by the operation in step 9. Reference numeral 12 denotes a DC power supply for supplying power to each circuit of the power supply section 1 and the power supply section 2.

Next, the powered part! To explain the circuit configuration, /3 is a synthesis/separation circuit, which inputs the power transmission wave from the power supply section / and the superimposed signal of this G through the transmission line 3, and separates the signal from the power transmission wave. and send it to the receiving and demodulating circuit / Party B,
The connection structure is such that the AC power is sent to the rectifying and stabilizing circuit/l, and the signal based on the operation G of the switch unit 19 sent from the transmission modulation circuit/7 is superimposed on the power transmission wave. . 15 is P L
T is a synchronous oscillator consisting of a circuit, etc., which generates a timing pulse signal with a phase and frequency that completely matches the signal transmitted from the power supply section I, and sends it to the transmission modulation circuit 17 and the reception demodulation circuit/B, Power source/side operation of power source! It is configured to perform signal processing on both sides in synchronization. The transmission modulation circuit/7 inputs the timing pulse signal from the synchronous oscillator/S, and based on this timing pulse, creates a time division signal according to the state of the switch section/W provided in the powered section 2, and converts it into a synthesis/separation circuit. I am trying to connect to send to /3. Furthermore, the reception demodulation circuit/demodulator inputs the timing pulse for reception from the synchronous oscillator/S, and also inputs the timing pulse for reception from the synchronous oscillator/S.
receives the signal sent from the unit via the synthesis/separation circuit/3, separates and identifies the received signal based on the timing pulse,
They are connected to the actuator section 1g of the actuating device installed on the side of the power-supplied section 2 so as to send drive signals respectively. /1LL is a rectification/stabilization circuit that operates to rectify the AC power sent through the synthesis/separation circuit /3 and supply stabilized DC power to each circuit of the power-fed section 2. Note that the power transmission wave is a square wave created by dividing the clock pulse, and the temporal relationship between the power transmission wave and the signal pulse is always constant, so the signal pulse can be used to indicate the rise and fall times of the power transmission wave. It is also possible to use the start-stop synchronization method as a reference.

Next, the operation of transmitting power and transmitting/receiving signals using the circuit configured as described above will be described.

First, in the inverter B, the oscillation signal of the clock pulse oscillator t is divided by the frequency divider S to form a square wave of several hundred I(z), and the applied DC power is converted into AC power of this frequency. and sends it to the synthesis/separation circuit 7. On the other hand,
In the transmission modulation circuit, a signal encoding the state of the switch unit 10 is generated at a period considerably shorter than the original oscillation frequency of the clock pulse oscillator l, that is, the square wave, and in the synthesis/separation circuit 7, this signal is converted into a signal for power transmission. Superimposed on the positive half wave of the square wave. Note that by superimposing the transmission signal from the power-fed unit 2 on the negative half-wave of the power transmission wave and distributing the transmitted and received signals by the transmission wave, it is easy to combine and separate the signals. In this way, the power transmission wave with the superimposed signal passes through the transmission line 3 to the combination/separation circuit/separation circuit of the powered section 2.
3vc transmission, where the signal is separated from the power transmission wave and sent to the reception demodulation circuit/6. On the other hand, in the synchronous oscillator/S, the timing pulse that is completely synchronized with the timing pulse signal oscillated by the clock pulse oscillator t of the power supply section/ is generated based on the received signal.
I will apply it to you. Therefore, by this timing pulse, the received signal is demodulated in the reception demodulation circuit/B, and the actuator section/sanitary operation command signal specified by the signal is sent, for example, to the powered section! The device on the side operates in response to this command. Note that the power transmission wave that cannot be sent from the synthesis/separation circuit 13 to the rectification/stabilization circuit/ll is converted into direct current and supplied to each circuit.

On the other hand, the signal of the switch section 19 operated in the powered section 2 is generated by the transmission modulation circuit/7 into a time-division signal corresponding to the timing pulse signal from the synchronous oscillator IS, and is sent to the synthesis/separation circuit 13. . Here, the transmission signal is superimposed on the negative half wave of the power transmission wave, and is sent to the combining/separating circuit 7 of the power feeding section via the transmission line 3. This received signal is
Here, it is separated from the power transmission wave and sent to the reception demodulation circuit 9, where the reception signal is demodulated based on a predetermined timing pulse signal applied from the clock pulse oscillation i+. An operation command signal is sent to the actuator section //, and devices on the power feeding section// side perform operations in response to the switch section/9 of the power receiving section 2.

Next, an embodiment in which signal transmission is performed by superimposing a frequency division signal on a power transmission wave will be described with reference to FIG.

First, the circuit configuration will be explained. In the power supply unit 21, 211 is an oscillator, 2B is an inverter, and 27 is a combination/separation circuit. 23 is a multi-frequency divider, and oscillator-21
Input the reference frequency signal from 9-L, create the frequency signal for the power transmission wave, and divide the frequency signals for transmission and reception from fl to fn and from fn0+ to fn0m. For example, a low frequency signal of several hundred Hz is used for power transmission. Then apply it to Inver 2 O,
The frequency of the number MH7, which is much higher than that of kneading, is f1 to f.
n is sent to the synthesis/separation circuit 27 via the switch section 29 and the coupling circuit 3o], and the frequency signals from rn11 to fn Jm"i are connected so as to be sent to the synchronous detector 2g. The coupling circuit 3o consists of a buffer circuit etc. for placing each frequency signal from fl to f'n on the same line, and the synchronous detector 2g receives fn sent from the powered section 22.
The frequency-divided signal from l-+ to fn0m is detected by each demodulation frequency signal fl from the multi-frequency divider-23, and the signal is extracted, and the actuator 2s on the output side is actuated. It is composed of three parts.

On the other hand, in the powered section 22, 31 is a combination/separation circuit;
Reference numeral 2 denotes a rectifying and stabilizing circuit that rectifies the power transmission wave outputted from the combining/separating circuit 3/ and supplies it to each circuit as DC power. It is a synchronous oscillator consisting of 33 PL LM paths, etc. 10-, which inputs the power transmission wave and frequency division multiplexed signal sent from the power supply section 2/,
The connection configuration is such that a reference frequency signal having the same frequency and phase as the oscillation frequency and phase of the oscillator 2t, which is the basis of the power transmission wave, is oscillated, and this signal is sent to the multi-frequency frequency divider 3Il. The multi-frequency frequency divider 34/ has almost the same configuration as the multi-frequency frequency divider 23 on the power supply section 2/ side, inputs and divides the reference frequency signal from the synchronous oscillator 33, and outputs frequencies from fl to fn. The signal is applied to the synchronous detector 3g as a demodulation signal, and the output frequency signal from fn++ to fnHim is sent to the synthesis/separation circuit 3/3 through the switch section 3B and the coupling circuit 3S.
connected to be sent to. The frequency-divided signals from fl to fn sent from the power supply unit 2/ with 33 synchronous detectors are detected by the respective demodulation frequency signals from the multi-frequency divider 3tl, and the output side actuator is detected by kneading. 37 is configured and connected to operate.

Next, the operation of the transmission circuit shown in FIG. 2 will be explained.

First, in the inverter 2B, the reference frequency of the oscillator 21 is divided by the multi-frequency frequency divider 23 into several hundred E.
-], the DC power is converted into square wave AC power by the frequency belief of about z, and is not sent to the combining/separating circuit 27. On the other hand,
In the switch section 29, when the switch fl, for example, is operated, a signal with a high frequency f1 of several MHz is applied from the multifrequency divider 23 to the combining and separating circuit 27 via the switch and the coupling circuit 30.

Then, the synthesis/separation circuit 27 superimposes the fl frequency signal on the power transmission wave, and this power transmission wave is not sent to the synthesis/separation circuit 3/ of the powered section 22 via the transmission line 3. In the synthesis/separation circuit 31, a 1.1 frequency signal is separated from the power transmission wave and sent to the synchronous detector 3gK. On the other hand, the synchronous oscillator 33
Based on the frequencies of the power transmission wave and the frequency division multiplexed signal, a frequency signal synchronized with the reference frequency generated by the power feeding section 21 oscillates and is output from the multifrequency divider 311vc.

Therefore, the multi-frequency frequency divider 3μ divides this frequency to create a frequency signal of f for demodulation, and sends it to the synchronous detector 3g to perform synchronous detection. As a result, a detection output is output from the f+ synchronous detector 3g, and the actuator 37 connected to this circuit is activated in response to the operation of the switch section 29 of the power supply section 2/.

On the other hand, in the switch section 3B of the powered section 22, fn+
When the switch of the + circuit is operated, a signal of frequency fn-H is sent to the combination/separation circuit 3/ through the combination circuit 3S,
Here, the fn + transmission signal is superimposed on the power transmission wave,
The signal is transmitted via the transmission line 3 to the combining/separating circuit 27 on the power feeding section 2/side. Then, in the synthesis/separation circuit 27, fn-H
The received signal is separated and sent to the synchronous detector 29. In the synchronous detector 29, synchronous detection is performed by a detection circuit that inputs the fn + frequency signal from the multi-frequency divider 23. By outputting the output, the actuator 2S connected to this output circuit operates in response to the operation of the powered section 22.

The above frequency division multiplexing using synchronous detectors 2g and 3g is an example when there are many signals to be transmitted and received, but when the degree of multiplexing is small, a filter etc. is used instead of the synchronous detector and multifrequency divider. It may be used to simplify the circuit.

In addition to the above embodiments, when transmitting and receiving audio signals between the power supply unit and the power supplied unit, 11) A M , it
)TM, PCM, AM, J='M, etc., it is possible to create and transmit digital signals.

Furthermore, by using a pair or more of opposed transformers in place of the transmission line 3, it is also possible to transmit power and send/receive signals to a mechanically separated moving device.

As described above, according to the present invention, since a non-sinusoidal power transmission wave such as a square wave is used, the maximum voltage is lower than that of a sine wave, and heat loss in the transmission path can be reduced. In addition, the conversion efficiency in inverters and the like is good, and the circuit components can be simplified compared to sine wave circuits. Furthermore, by synchronizing the transmitted and received signals with the power transmission wave, timing pulses are not required, the signals do not overlap at the rise and fall of the power transmission wave, and signal transmission and reception can be performed with fewer malfunctions.

[Brief explanation of the drawing]

14- Figures show an embodiment of the present invention, FIG. 1 is a block diagram of a power transmission and signal transmitting/receiving circuit, and FIG. 2 is a same block diagram of another embodiment. /...Power feeding unit, 2...Power receiving unit, 3...Transmission line, D...Clock pulse oscillator, S...Frequency divider, B...Inverter, 7. /3...Synthesis/separation circuit, wa,
/B...Reception demodulation circuit, g, 17...Transmission modulation circuit, 15...Synchronized oscillator. Patent application: Toyoda Gosei Co., Ltd. 15-

Claims (1)

[Claims]
A method of simultaneously transmitting and receiving signals between the power supply section and the power supplied section using the same transmission path, the signal being time-division multiplexed on the non-sinusoidal power transmission wave formed in the power supply section. A clock pulse signal for a time division multiplexed signal is created in synchronization with the power transmission wave, and a part of the power transmission wave is used as a synchronization signal for demodulating the time division multiplexed signal. A power transmission and signal sending/receiving method characterized by use as a signal. (2) The transmission and reception of the time division multiplexed signal is separately superimposed on the positive half wave and the negative half wave of the power transmission wave. How to send and receive. (5) A method of transmitting alternating current power from a power supply unit to a power supplied unit, and at the same time transmitting and receiving signals between the power supply unit and the power supplied unit using the same transmission path, the method comprising: Transmitting and receiving signals by superimposing a frequency division multiplexed signal on the non-sinusoidal power transmission wave formed in part G,
A method for power transmission and signal transmission and reception, characterized in that a frequency division multiplexed signal is created in synchronization with the power transmission wave. (4) The transmission and reception of the frequency division multiplexed signal is separately superimposed on the positive half wave and the negative half wave of the power transmission wave. How to send and receive.