阅读说明：本技术 电力传输系统、发送装置及接收装置 (Power transmission system, transmission device, and reception device ) 是由 铃木雄将 于 2017-07-04 设计创作，主要内容包括：发送装置(1)具有：脉冲变压器(14a)，其具有与PHY(13)连接的一次绕组以及与双绞线(31a)的一端连接的二次绕组；脉冲变压器(14b)，其具有与PHY(13)连接的一次绕组以及与双绞线(31b)的一端连接的二次绕组；以及绝缘DC/AC转换器(12)，其具有一对输出端子(125、126)，绝缘DC/AC转换器(12)将直流电压转换为脉冲电压而输出，该一对输出端子(125、126)的一个与脉冲变压器(14a)具有的二次绕组的中点连接，另一个与脉冲变压器(14b)具有的二次绕组的中点连接，接收装置(2)具有：脉冲变压器(22a)，其具有与双绞线(31a)的另一端连接的一次绕组以及与PHY(23)连接的二次绕组；脉冲变压器(22b)，其具有与双绞线(31b)的另一端连接的一次绕组以及与PHY(23)连接的二次绕组；以及绝缘AC/DC转换器(24)，其具有一对输入端子(241、242)，绝缘AC/DC转换器(24)将输入进来的脉冲电压转换为直流电压，该一对输入端子(241、242)的一个与脉冲变压器(22a)具有的一次绕组的中点连接，另一个与脉冲变压器(22b)具有的一次绕组的中点连接。(A transmission device (1) is provided with: a pulse transformer (14a) having a primary winding connected to the PHY (13) and a secondary winding connected to one end of the twisted pair (31 a); a pulse transformer (14b) having a primary winding connected to the PHY (13) and a secondary winding connected to one end of the twisted pair (31 b); and an insulated DC/AC converter (12) having a pair of output terminals (125, 126), wherein the insulated DC/AC converter (12) converts a direct-current voltage into a pulse voltage and outputs the pulse voltage, one of the pair of output terminals (125, 126) is connected to a midpoint of a secondary winding of the pulse transformer (14a), and the other is connected to a midpoint of a secondary winding of the pulse transformer (14b), and the receiving device (2) has: a pulse transformer (22a) having a primary winding connected to the other end of the twisted pair (31a) and a secondary winding connected to the PHY (23); a pulse transformer (22b) having a primary winding connected to the other end of the twisted pair (31b) and a secondary winding connected to the PHY (23); and an insulated AC/DC converter (24) having a pair of input terminals (241, 242), wherein the insulated AC/DC converter (24) converts an input pulse voltage into a direct current voltage, and one of the pair of input terminals (241, 242) is connected to a midpoint of a primary winding of the pulse transformer (22a), and the other is connected to a midpoint of a primary winding of the pulse transformer (22 b).)

1. A power transmission system characterized in that,

comprises a transmitting device and a receiving device,

the transmission device includes:

a 1 st communication unit that outputs a communication signal;

a 1 st pulse transformer having a 1 st primary winding connected to the 1 st communication unit and having a 1 st secondary winding connected to one end of a 1 st communication line;

a 2 nd pulse transformer having a 2 nd primary winding connected to the 1 st communication unit and having a 2 nd secondary winding connected to one end of a 2 nd communication line; and

an insulation type 1 st converter having a pair of output terminals, the 1 st converter converting a direct current voltage into a pulse voltage and outputting the pulse voltage, one of the pair of output terminals being connected to a midpoint of the 1 st secondary winding and the other being connected to a midpoint of the 2 nd secondary winding,

the receiving apparatus has:

a 3 rd pulse transformer having a 3 rd primary winding connected to the other end of the 1 st communication line and having a 3 rd secondary winding;

a 4 th pulse transformer having a 4 th primary winding connected to the other end of the 2 nd communication line and having a 4 th secondary winding;

a 2 nd communication unit connected to the 3 rd secondary winding and the 4 th secondary winding, and to which a communication signal is input; and

and an insulation type 2 nd converter having a pair of input terminals, the 2 nd converter converting an input pulse voltage into a direct current voltage, one of the pair of input terminals being connected to a midpoint of the 3 rd primary winding, and the other being connected to a midpoint of the 4 th primary winding.

2. The power transmission system according to claim 1,

the 1 st converter adjusts the rise time and the fall time of the pulse voltage so that the frequency bandwidth of the output pulse voltage does not overlap with the frequency bandwidth of the communication signal output by the 1 st communication unit.

3. The power transmission system according to claim 1,

the 1 st converter controls a frequency and a duty ratio of the output pulse voltage based on the pulse voltage input to the 2 nd converter.

4. The power transmission system according to claim 1,

the 2 nd converter converts an input pulse voltage into a plurality of direct current voltages.

5. A transmission device includes:

a 1 st communication unit that outputs a communication signal;

a 1 st pulse transformer having a 1 st primary winding connected to the 1 st communication unit and having a 1 st secondary winding connected to one end of a 1 st communication line;

a 2 nd pulse transformer having a 2 nd primary winding connected to the 1 st communication unit and having a 2 nd secondary winding connected to one end of a 2 nd communication line; and

and an insulation type 1 st converter having a pair of output terminals, wherein the 1 st converter converts a direct current voltage into a pulse voltage and outputs the pulse voltage, one of the pair of output terminals is connected to a midpoint of the 1 st secondary winding, and the other output terminal is connected to a midpoint of the 2 nd secondary winding.

6. A receiving device, having:

a 3 rd pulse transformer having a 3 rd primary winding connected to the other end of the 1 st communication line and having a 3 rd secondary winding;

a 4 th pulse transformer having a 4 th primary winding connected to the other end of the 2 nd communication line and having a 4 th secondary winding;

a 2 nd communication unit connected to the 3 rd secondary winding and the 4 th secondary winding, and to which a communication signal is input; and

and an insulation type 2 nd converter having a pair of input terminals, the 2 nd converter converting an input pulse voltage into a direct current voltage, one of the pair of input terminals being connected to a midpoint of the 3 rd primary winding, and the other being connected to a midpoint of the 4 th primary winding.

Technical Field

The present invention relates to a power transmission system, a transmission device, and a reception device that transmit power using a communication line.

Background

A technique of transmitting Power to a remote device using a communication line is known, and examples thereof include PoE (registered trademark) which transmits Power using an ethernet (registered trademark; hereinafter, not described) cable (see, for example, patent document 1). In PoE, dc power is transmitted from a transmitting device to a device via two twisted pairs with which an ethernet cable has and a receiving device. Examples of the device include a VoIP phone, a WLAN transmitter, and a monitoring camera. In addition, the ethernet cable can transmit a communication signal, which is a differential signal. Standards for PoE are set forth in IEEE 802.3.

On the other hand, in a power transmission system using an ethernet cable, a pulse transformer for electrically insulating the inside of a transmission device from the ethernet cable in transmission of a communication signal is provided in the transmission device. Therefore, in the power transmission system, it is also necessary to insulate the inside of the transmission device from the ethernet cable in the transmission device for power transmission. The receiving device is also the same as described above. Therefore, in the conventional power transmission system, the transmitting device is provided with an insulated DC/DC converter and a pse (power sourcing equipment) controller, and the receiving device is provided with a pd (powered device) controller and an insulated DC/DC converter. Further, the PSE controller performs complicated control such as detection of the PD controller, classification of the PD controller, and management of power supply to the PD controller.

Patent document 1: japanese laid-open patent publication No. 2015-180046

Disclosure of Invention

As described above, the conventional power transmission system has a problem that it is necessary to use a PSE controller and a PD controller.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power transfer system that can perform power transfer using a communication line without using a PSE controller and a PD controller.

The power transmission system according to the present invention includes a transmission device and a reception device, and the transmission device includes: a 1 st communication unit that outputs a communication signal; a 1 st pulse transformer having a 1 st primary winding connected to the 1 st communication unit and having a 1 st secondary winding connected to one end of the 1 st communication line; a 2 nd pulse transformer having a 2 nd primary winding connected to the 1 st communication unit and having a 2 nd secondary winding connected to one end of the 2 nd communication line; and an insulation type 1 st converter having a pair of output terminals, the 1 st converter converting a direct current voltage into a pulse voltage and outputting the pulse voltage, one of the pair of output terminals being connected to a midpoint of the 1 st secondary winding, and the other being connected to a midpoint of the 2 nd secondary winding, the receiving device including: a 3 rd pulse transformer having a 3 rd primary winding connected to the other end of the 1 st communication line and having a 3 rd secondary winding; a 4 th pulse transformer having a 4 th primary winding connected to the other end of the 2 nd communication line and having a 4 th secondary winding; a 2 nd communication unit connected to the 3 rd secondary winding and the 4 th secondary winding, to which the communication signal is input; and an insulation type 2 nd converter having a pair of input terminals, the 2 nd converter converting an input pulse voltage into a direct current voltage, one of the pair of input terminals being connected to a midpoint of the 3 rd primary winding, and the other being connected to a midpoint of the 4 th primary winding.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, since the configuration is as described above, power transmission using the communication line can be performed without using the PSE controller and the PD controller.

Drawings

Fig. 1 is a schematic circuit diagram showing a configuration example of a power transmission system according to embodiment 1 of the present invention.

Fig. 2 is a schematic circuit diagram showing a configuration example of a power transmission system according to embodiment 2 of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the drawings.