CN103795156B - A kind of track traffic contactless power supply device of honeycomb fashion coil and method of supplying power to thereof - Google Patents

Abstract

A rail transit non-contact power supply device with honeycomb coils and a power supply method thereof, the power supply device includes a pickup coil at the bottom of the locomotive, the controller of the power supply station, and the controller is connected with the AC-DC-AC frequency converter, AC-DC-AC conversion At the same time, the power supply coil is connected with the power supply coil buried under the surface of the track power supply section. The power supply coil is composed of multiple small power supply coils connected in parallel under the surface of the track power supply section with equal size and honeycomb arrangement. Each small power supply coil is connected in series. The switch tube, the control end of the switch tube is connected to the controller; a signal receiver for detecting the pick-up coil is set every other distance on the center line of the track power supply section, and the signal receiver is also connected to the controller; Equipped with a signal generator. The non-contact power supply device has high power supply, high magnetic field utilization rate, energy saving, and obviously reduces electromagnetic radiation.

Description

A rail transit non-contact power supply device with honeycomb coil and power supply method thereof

technical field

The invention relates to a rail transit non-contact power supply device of a honeycomb coil and a power supply method thereof.

Background technique

The main power supply mode of the current rail vehicles is that the pantograph of the locomotive contacts with the catenary along the track, and takes power from the catenary. There are many problems in this direct contact power supply mode: the direct contact transmission mode of the wire is easily affected by external corrosion, water dust and dirt; the exposed wire is prone to carbon deposits, abrasion, electric sparks, etc. There are dangers; long-distance power transmission Lines take up a lot of space and metal, and will seriously restrict the wiring engineering of wired networks in special geographical operating environments (such as mountains, lakes, etc.). The use of non-contact power transmission technology can avoid the above-mentioned similar accidents and simplify the power supply system.

Inductive non-contact power transfer (ICPT) technology is based on the principle of electromagnetic field near-field loose coupling induction, and comprehensively utilizes power electronic conversion technology, magnetic field coupling technology and control theory to realize that electrical equipment obtains energy from the grid in a non-wire contact manner. Technology, with the characteristics of flexible power supply, safety and reliability, and low maintenance cost.

The existing rail transit non-contact power supply device is composed of: the pickup coil at the bottom of the locomotive, the controller of the power supply station, the controller is connected with the AC-DC-AC converter, and the AC-DC-AC converter is connected with the track power supply section at the same time. The power supply coil buried under the ground is connected, and the power supply coil is a long rectangular coil composed of two long straight wires around the track power supply section. After the locomotive enters the power supply section, the AC-DC-AC inverter supplies power to the power supply coil under the control of the controller (4), the power supply coil generates an alternating magnetic field, and the pick-up coil induces an induced electromotive force to realize non-contact power supply to the locomotive. The existing problems are: the coil distribution is sparse, the generated magnetic field strength is low, and the power supply power is low; and during the whole time period when the locomotive enters the power supply section to pick up power by induction, the entire long rectangular power supply coil is in the energized state, and the coil is picked up at every moment It can only take power from a small area of local induction in the long rectangular power supply coil, the effective induction area is small, the utilization rate of the magnetic field is low, and energy waste and large electromagnetic radiation are generated.

Contents of the invention

The purpose of the present invention is to provide a rail transit non-contact power supply device with honeycomb coils. The non-contact power supply device has high power supply, high magnetic field utilization rate, energy saving, and significantly reduces electromagnetic radiation.

The technical solution adopted by the present invention to realize its object of the invention is a rail transit non-contact power supply device with cellular coils, including the pickup coil at the bottom of the locomotive, the controller of the power supply station, and the controller connected to the AC-DC-AC converter , The AC-DC-AC converter is connected with the power supply coil buried under the surface of the track power supply section at the same time, and it is characterized in that: the described power supply coil is a plurality of small power supply coils that are equal in size and full of honeycombs under the surface of the track power supply section. Each small power supply coil is connected in series with a switch tube, and the control end of the switch tube is connected to the controller; a signal receiver for detecting the pick-up coil is set every other distance from the small power supply coil on the center line of the ground surface of the track power supply section, and the signal receiver The receiver is also connected to the controller; the pickup coil is provided with a signal generator.

Another object of the present invention is to provide a method for conducting non-contact power supply to locomotives using the above-mentioned rail transit non-contact power supply device of the honeycomb coil.

The technical solution adopted by the present invention to achieve another object of the invention is a method for using the above-mentioned rail transit non-contact power supply device of the honeycomb coil to carry out non-contact power supply to the locomotive, and its specific method is:

a. When the locomotive does not enter the power supply station and all the signal receivers on the power supply section cannot detect the signal emitted by the signal generator on the pick-up coil, the controller controls the switch tube connected in series with each small power supply coil to turn off, and the power supply section All the small power supply coils on the board are de-energized;

b. When the locomotive enters the power supply station, the pick-up coil enters the power supply section, and the signal receiver directly below the pick-up coil detects the signal emitted by the signal generator on the pick-up coil, the controller controls multiple small The switch tubes connected in series on the power supply coil are turned on, and the total area of the small power supply coil that is turned on is 1.8-2.2 times that of the pick-up coil; the high-frequency AC current output by the AC-DC-AC inverter passes through the small power supply coil that is turned on, generating Alternating magnetic field, the pick-up coil senses the alternating magnetic field, generates induced electromotive force, and realizes non-contact power supply to the locomotive;

c. As the locomotive and the pick-up coil move forward, the signal receiver that detects the signal emitted by the signal generator is also continuously replaced. turn on, and turn off the remaining switch tubes, so that the total area of the small power supply coil that is turned on is 1.8-2.2 times that of the pickup coil, and the pickup coil is always located directly above the small power supply coil that is turned on;

d. When the pick-up coil of the locomotive leaves the power supply section, and all signal receivers cannot detect the signal emitted by the signal generator on the pick-up coil, the controller controls the switch tube connected in series on each small power supply coil to turn off, All small supply coils on the supply section are de-energized.

Compared with prior art, the beneficial effect of the present invention is:

1. The honeycomb layout of the coils effectively increases the distribution density of the coils, increases the magnetic field strength, and makes the power supply high.

2. During the whole time period when the locomotive enters the power supply section to pick up electricity by induction, only the corresponding small power supply coil directly below the pickup coil is energized and works. The magnetic field generated by the small power supply coil is effectively used, and the magnetic field utilization rate is high; it cannot be picked up. The small power supply coils at other positions induced by the coil are in a power-off state, which reduces electromagnetic radiation and saves energy.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.

Fig. 2 is a top view distribution diagram of a small power supply coil, a signal receiver, a pickup coil and a signal generator when the pickup coil is not in the power supply section according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the distribution of the small power supply coil, signal receiver, pickup coil and signal generator when the pickup coil enters the power supply section according to the embodiment of the present invention. The small power supply coil drawn by the thick line in Fig. coil.

detailed description

Example

Figures 1-3 show a specific embodiment of the present invention, a rail transit non-contact power supply device with cellular coils, including a pick-up coil 3 at the bottom of the locomotive, a controller 4 of the power supply station, the controller 4 and the exchange- The DC-AC converter 1 is connected, and the AC-DC-AC converter 1 is connected with the power supply coil buried under the surface of the track power supply section at the same time. A plurality of small power supply coils 2a below are connected in parallel, and each small power supply coil 2a is connected in series with a switch tube 2b, and the control terminal of the switch tube 2b is connected to the controller 4; every other small power supply coil on the center line of the track power supply section A signal receiver 5 for detecting the pick-up coil 3 is provided at a distance of 2 a, and the signal receiver 5 is also connected to the controller 4; the pick-up coil 3 is provided with a signal generator 6 .

The method of using the rail transit non-contact power supply device of the honeycomb coil of this example to carry out non-contact power supply to the locomotive is as follows:

a. When the locomotive does not enter the power supply station, and all signal receivers 5 on the power supply section cannot detect the signal emitted by the signal generator 6 on the pick-up coil 3, the controller 4 controls the switch tube connected in series with each small power supply coil 2a 2b is turned off, and all the small power supply coils 2a on the power supply section are powered off, as shown in FIG. 2 .

b. When the locomotive enters the power supply station, the pick-up coil 3 enters the power supply section, and when the signal receiver 5 directly below the pick-up coil 3 detects the signal emitted by the signal generator 6 on the pick-up coil 3, the controller 4 controls the signal receiver to The switching tubes 2b connected in series on a plurality of small power supply coils 2a centered on 5 are turned on, and the total area of the small power supply coils 2a that are turned on is 1.8-2.2 times that of the pickup coil 3; The high-frequency alternating current passes through the small power supply coil 2a that is turned on to generate an alternating magnetic field, and the pick-up coil 3 senses the alternating magnetic field to generate an induced electromotive force to realize non-contact power supply to the locomotive, as shown in Figure 3.

c. As the locomotive and the pick-up coil 3 advance, the signal receiver 5 that detects the signal emitted by the signal generator 6 is also constantly replaced forward, and the controller 4 controls a plurality of small power supply coils centered on the replaced signal receiver 5 The switching tube 2b connected in series with 2a is turned on, and the remaining switching tubes 2b are turned off, so that the total area of the small power supply coil 2a that is turned on is 1.8-2.2 times that of the pickup coil 3, and the pickup coil 3 is always located in the small power supply coil that is turned on. Directly above the coil 2a, as shown in Figure 3.

d, when the pick-up coil 3 of the locomotive leaves the power supply section, when all signal receivers 5 cannot detect the signal emitted by the signal generator 6 on the pick-up coil 3, the controller 4 controls each small power supply coil 2a to be connected in series The switching tube 2b of the power supply section is turned off, and all the small power supply coils 2a on the power supply section are powered off, as shown in FIG. 2 .

The signal generator 6 and the signal receiver 5 of the present invention can be various existing signal generators and signal receivers, such as an infrared signal generator and an infrared signal receiver, an ultrasonic signal generator and an infrared signal receiver.

Claims (1)

1. A method for carrying out non-contact power supply to a locomotive by a rail transit non-contact power supply device using a honeycomb coil, the rail traffic non-contact power supply device of the honeycomb coil, comprising a pick-up coil (3) at the bottom of the locomotive, and a power supply station The controller (4), the controller (4) is connected to the AC-DC-AC converter (1), and the AC-DC-AC converter (1) is connected to the power supply coil buried under the surface of the track power supply section at the same time, wherein: The power supply coils are composed of a plurality of small power supply coils (2a) connected in parallel under the surface of the track power supply section of the same size and filled with honeycomb type. Each small power supply coil (2a) is connected in series with a switch tube (2b), and the switch tube The control end of (2b) links to each other with controller (4); The distance of every other small power supply coil (2a) on the center line of track power supply section is provided with a signal receiver (5) for detecting pickup coil (3), and the signal receiving The device (5) is also connected with the controller (4); the pick-up coil (3) is provided with a signal generator (6), The method for carrying out non-contact power supply to locomotives using the rail transit non-contact power supply device of the honeycomb coil, its specific method is: a. When the locomotive does not enter the power supply station, and all signal receivers (5) on the power supply section cannot detect the signal emitted by the signal generator (6) on the pickup coil (3), the controller (4) controls each The switching tubes (2b) connected in series with the small power supply coils (2a) are turned off, and all the small power supply coils (2a) on the power supply section are powered off; b. When the locomotive enters the power supply station, the pick-up coil (3) enters the power supply section, and the signal receiver (5) directly below the pick-up coil (3) detects the signal emitted by the signal generator (6) on the pick-up coil (3) , the controller (4) controls the switching tubes (2b) connected in series on a plurality of small power supply coils (2a) centered on the signal receiver (5) to be turned on, and the total area of the small power supply coils (2a) that are turned on is 1.8-2.2 times of the pickup coil (3); the high-frequency AC current output by the AC-DC-AC converter (1) passes through the conduction small power supply coil (2a), generating an alternating magnetic field, which is sensed by the pickup coil (3) Alternating magnetic field generates induced electromotive force to realize non-contact power supply to locomotives; c. As the locomotive and the pick-up coil (3) move forward, the signal receiver (5) that detects that the signal generator (6) transmits the signal is also constantly replaced forward, and the controller (4) controls the replaced signal receiver ( 5) Switching tubes (2b) connected in series with a plurality of small power supply coils (2a) at the center are turned on, and the remaining switch tubes (2b) are turned off, so that the total area of the small power supply coils (2a) that are turned on is the pick-up coil 1.8-2.2 times of (3), and the pick-up coil (3) is always located directly above the conducting small power supply coil (2a); d, when the pick-up coil (3) of the locomotive was driven out of the power supply section, all signal receivers (5) could not detect the signal emitted by the signal generator (6) on the pick-up coil (3), the controller (4 ) control the switching tubes (2b) connected in series on each small power supply coil (2a) to turn off, and all the small power supply coils (2a) on the power supply section are powered off.