WO2016127776A1

WO2016127776A1 - Integrated smart current collector

Info

Publication number: WO2016127776A1
Application number: PCT/CN2016/071720
Authority: WO
Inventors: 郝韵
Original assignee: 上海尊阶士工程技术有限公司
Priority date: 2015-02-13
Filing date: 2016-01-22
Publication date: 2016-08-18
Also published as: CN104626998B; CN104626998A

Abstract

An integrated smart current collector comprising: power supply conversion modules (1, 2, and 5), a high-voltage safety isolation module (4), and a trolley pole gas-electric control module, all of which are integrated within an entire control box (9). Both the control box (9) and a trolley pole assembly are fixed together onto a base (10) connected to the roof of a car, thus implementing modularization of a current collecting system. During use, when high-voltage electricity passes through the power supply conversion modules, an adjustable stable voltage is produced, and the high-voltage safety isolation module is capable of forming effective protection for a circuit.

Description

Integrated smart collector

Technical field

The invention relates to the technical field of vehicle power supply systems, in particular to a collector power supply system, comprising a power conversion module, a high voltage safety isolation module and a smart collector pole module.

Background technique

With the rapid development of China's transportation technology, it has provided great convenience for the public to travel, such as cars, trams, trains, etc., playing an important role in people's production and life.

As we all know, electric vehicles or trains need to rely on external power sources to provide power. Usually, the collector poles are installed on the top of the vehicle, and the collector poles are connected to the external high-voltage power grid to introduce high-voltage power into the vehicle power supply system, such as the patent publication number. CN 104130796 A discloses a trolley bus and an isolated power supply system thereof, which introduces direct current into a transformer to form a required direct current through an isolated DC/DC, and the disadvantages thereof are: (1) the power supply system is prone to occur outside the required frequency. At the frequency point, a stable power signal cannot be obtained; (2) when reverse current occurs in the power supply system, lack of protection will cause the entire power supply system to be interrupted, and may even cause an accident; (3) the power grid is located above the roof, generally Collecting power supply system, the collector pole and DC/DC are distributed, the integration is poor, and the installation is difficult. When the high voltage is introduced, more power cables and control signal lines need to be connected, which increases the leakage and control signal error. The risk of reducing security.

Therefore, how to effectively and efficiently isolate the power supply system and at the same time achieve a high level of integration, and obtain a stable power signal of the required frequency, becomes a technical problem to be solved by the present invention.

Summary of the invention

In order to solve the above technical problem, the present invention provides an integrated smart collector, high voltage After the electric circuit passes through the chopper circuit, the inverter circuit and the rectifying circuit, an adjustable stable voltage is formed, and at the same time, the high-voltage magnetic isolation can effectively protect the circuit, and more importantly, the collector provided by the invention has high integration characteristics. .

The technical solution of the present invention is as follows:

The integrated intelligent current collector comprises: a power conversion module, a high voltage safety isolation module and a collector pole gas and electric control module, which are integrated in the overall control box, and the control box and the collector rod assembly are uniformly fixed on the roof On the connected base, the assembly of the current collecting system is modularized.

Advantageously, the power conversion module includes an integrated integrated chopper circuit, at least one or more inverter circuits, and a rectification circuit matched with the inverter circuit, integrally disposed in the control box, through the The smart collector pole is connected to the power grid; wherein the inverter circuit includes a first filter and a DC/AC converter, the rectifier circuit includes an AC/DC converter and a second filter, and converts the DC power into an AC power And converting the alternating current into direct current, the current collector has a conversion function, and at the same time, a high-voltage magnetic isolation is provided between the DC/AC converter and the AC/DC converter to form a protection for the circuit.

As a further technical solution, the present invention provides an overvoltage protection module between the chopper circuit and the power grid, and the overvoltage protection module includes a fuse that is sequentially disposed between the power grid and the chopper circuit. And an input switch, the input switch being controlled by the main control module.

As a preferred technical solution, the present invention includes a chopper circuit, one or more sets of inverter circuits and corresponding rectification circuits, the plurality of sets of inverter circuits are connected in parallel, and a rectification circuit is disposed between the rectification circuit and the corresponding inverter circuit. There is high voltage magnetic isolation.

As a further technical solution, the present invention is provided with a line reactor on the electric wire, and the line reactor is located between the input switch and the rectifying circuit.

As a further technical solution, the present invention is at least between the power grid and the fuse, between the fuse or the input switch and the line reactor, the chopper circuit and the inverter circuit In parallel, there are transformers or varistors for monitoring the state of the current and voltage of the high-voltage circuit after passing through different electrical components or for overload protection, which can electrically isolate the electrical components.

Advantageously, the power conversion module, the high voltage safety isolation module and the control unit of the smart collector bar may be disposed within the control box.

Advantageous Effects: The present invention provides an effective high-voltage safety isolation and high integration design of the power supply system to obtain a stable power supply signal of a desired frequency, and when the reverse current occurs, the inverter circuit and the rectifier circuit can be timely interrupted. Open to protect electrical components.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural view of an integrated current collector with a power conversion function and high voltage isolation disclosed in Embodiment 1 of the present invention;

2 is a schematic structural view of an integrated current collector with a power conversion function and high voltage isolation disclosed in Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of an overall structure of an integrated current collector with a power conversion function and high voltage isolation according to an embodiment of the present invention.

The names of the corresponding parts represented by numbers and letters in the figure:

1. Chopper circuit; 2. Inverter circuit; 21. First inverter circuit; 22. Second inverter circuit; 211, first filter; 212, DC/AC converter; 3. Line reactor; 4, high voltage magnetic isolation; 5, rectifier circuit; 51, the first rectifier circuit; 52, the second rectifier circuit; 511, AC / DC converter; 512, the second filter; 6, the transformer; 7, fuse; 8. Input switch.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, the field All other embodiments obtained by a skilled person without creative efforts are within the scope of the present invention.

The invention provides an integrated intelligent current collector, and the working principle thereof is: by arranging the chopper circuit, the inverter circuit and the rectifying circuit as one body, the cable is connected with the intelligent collecting rod, and the intelligent collecting rod relies on The cylinder is pushed to connect with an external high-voltage power grid (usually 400V-1200V), and the introduced current passes through the chopper circuit, which can convert the high-voltage direct current into an adjustable direct current, and the output is output to the IGBT (Insulated Gate Bipolar Transistor). The controllable H-bridge inverter circuit composed of bipolar transistors enters the rectifier circuit after high voltage magnetic isolation, and outputs a certain range of adjustable stable voltage.

The present invention will be further described in detail below with reference to the embodiments and specific embodiments.

Example 1

The integrated intelligent current collector includes an integrated power conversion module, a high voltage safety isolation module and a smart collector pole, a power conversion module and a high voltage safety isolation module arranged in the control box 9, and fixed in connection with the roof in combination with FIG. The base 10 has the characteristics of high integration, convenient installation and strong anti-interference.

1 , the power conversion module includes a chopper circuit 1 connected in series by wires, a set of inverter circuits 2, and a rectification circuit 5 connected to the inverter circuit 2, the chopper circuit 1 and an external power grid Connected, the connection can be connected to the external power grid by using the collector pole, or directly connected to the external power grid through the power line, and the high voltage power on the external power grid is introduced to the chopper circuit 1 through the chopper The circuit 1 converts the high voltage direct current into an adjustable direct current and inputs it to the inverter circuit 2.

The inverter circuit includes a filter A211 and a DC/AC 212 connected to the filter A211, and the filter A211 can effectively filter out frequencies other than the frequency of the specific frequency in the input adjustable DC power. It can obtain the power signal of the specific frequency required, and convert the direct current into alternating current through DC/AC212.

The rectifier circuit 5 includes an AC/DC 511 and a filter B512. A high-voltage magnetic isolation 4 is disposed between the DC/AC 212 and the AC/DC 511, and a current output from the DC/AC 212 passes through the high voltage. Magnetic isolation 4 is input to the AC/DC 511, and through the filter B512, an adjustable direct current is output.

In the process of use, since the voltage of the power grid is high, the current is directly connected to the chopper circuit 1 by the power grid, in order to be able to form a protection against the circuit, the present invention is between the chopper circuit 1 and the power grid An overvoltage protection module is provided. The overvoltage protection module includes a fuse 7 and an input switch 8 which are sequentially disposed between the power grid and the chopper circuit 1. The input switch 8 is controlled by a main control module. When the current passes through the chopper circuit 1, the fuse 7 can protect the circuit, that is, when the current is higher than the specified value of the fuse 7, the fuse 7 is disconnected, and the chopper circuit 1 and the inverter circuit are avoided. And the rectified current constitutes damage.

In the actual working process, usually the grid and the current collector are kept in a long-term state, the fuse 7 protects the safety of the circuit at any time, and the vehicle does not need to use an external power source in some cases, and the long-term contact shortens the service life of the electrical component. Therefore, the present invention adds an input switch 8 between the chopper circuit 1 and the fuse 7, and sends a signal to the main control module through the vehicle control system, and the main control module can amplify the signal to control the input switch 8. Closed and disconnected.

In order to be able to monitor the current before and after the current enters the overvoltage protection module, the present invention is between the grid and the fuse 7, and between the fuse 7 and the chopper circuit 1, the chopper circuit 1 A transformer 6 or a varistor is connected in parallel with the inverter circuit, and the current value of the current before flowing into the fuse 7 can be passed through the transformer 6 or the varistor, after flowing through the fuse 7 The current value before the chopper circuit 1 and the current value after passing through the chopper circuit 1 are monitored, and the varistor can implement overload protection.

In summary, the present invention protects the electrical components in the chopper circuit 1, the inverter circuit 2, and the rectifier circuit 5 by protecting the introduced current through the overvoltage protection module, especially The overvoltage protection module can ensure the safety of the circuit on the vehicle; when the current enters the inverter circuit 2 through the chopper circuit 1, after flowing to the rectifier circuit 5, the reverse current will Causing the rectifier circuit 5, the inverter circuit 2, and the chopper circuit 1 to be damaged. At this time, by providing a high-voltage magnetic isolation 4 between the inverter circuit 2 and the rectifier circuit 5, when detected When a certain reverse current is applied, the high-voltage magnetic isolation 4 can automatically cut off the connection between the rectifier circuit 5 and the inverter circuit 2, and ensure the safety of electrical components on the overall circuit of the current collector.

Example 2

The integrated intelligent current collector is the same as the first embodiment except that the present embodiment includes two sets of inverter circuits and two sets of rectifier circuits, wherein different inverter circuits are connected in parallel, and are implemented here. For example, referring to FIG. 2, the inverter circuit is divided into a first inverter circuit 21 and a second inverter circuit 22. The rectifier circuit is divided into a first rectifier circuit 51 and a second rectifier circuit 52. The first rectifier circuit 51 is included. a high-voltage magnetic isolation 4 is disposed between the first inverter circuit 21 and the second rectifier circuit 52 and the second inverter circuit 22, and the second inverter circuit 22 and the first An inverter circuit is connected, and the current processed by the chopper circuit 1 passes through the first inverter circuit 21, a part flows to the first rectifier circuit 51, and another portion flows to the second inverter circuit 22, and then The high voltage magnetic isolation 4 is then output through the second rectifier circuit 52.

In this embodiment, the first rectified current is connected to the output end of the second rectifying circuit 52 to form a unified output end, and the DC power of the adjustable voltage is output, and the circuit structure of the embodiment is used. In Example 1, it can output higher power. At the same time, if reverse current occurs during current flow, mutual influence will not occur between the lines, which improves the safety of vehicle operation.

Example 3

The rest is the same as Embodiment 1 or Embodiment 2, except that the present invention is provided with a line reactor 3 on the electric wire. Referring to FIG. 1 and FIG. 2, the line reactor 3 is located at the input switch 8. Between the chopper circuit and the line reactor 3, the harmonics generated by the current flowing to the chopper circuit 1 can be effectively suppressed, thereby further improving the safety of the overall system.

A transformer 6 or a varistor is connected in parallel between the input switch and the line reactor, and the current value before and after the current entering the line reactor 3 can be passed through the transformer 6 or the varistor. Monitoring is performed while the transformer 6 or varistor can protect the line reactor 3.

It should be noted that the inverter circuit and the rectifier circuit mentioned in the present invention may be a group, two or more groups, two or more groups are connected in parallel, and there is no limitation on the number of groups. .

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept. The scope of protection of the invention.

Claims

The integrated intelligent current collector is characterized in that it comprises: a power conversion module, a high voltage safety isolation module, and a collector rod gas and electric control module, which are integrated in the overall control box, and the control box and the collector rod assembly are uniformly fixed The assembly of the current collecting system is modularized on the base connected to the roof.
The integrated intelligent current collector according to claim 1, wherein said power conversion module comprises a chopper circuit, at least one set of inverter circuits, and a rectifying circuit matched with said inverter circuit, said The wave circuit, the inverter circuit and the rectifier circuit are integrated in the control box, and are connected to the power grid through the collector bar; the inverter circuit includes a first filter and a DC/AC converter, and the rectifier circuit includes AC/DC conversion And a second filter, a high voltage safety isolation module is disposed between the DC/AC converter and the AC/DC converter;
The integrated intelligent current collector according to claim 2, wherein an overvoltage protection module is disposed between the chopper circuit and the power grid, and the overvoltage protection module includes a power supply and a device in sequence. The fuses between the chopper circuits and the input switches.
The integrated intelligent current collector according to claim 3, wherein the input switch controls its switch through the main control module.
The integrated intelligent current collector according to claim 2 or 3, comprising one or more sets of inverter circuits and corresponding rectifier circuits, wherein the plurality of sets of inverter circuits are connected in parallel, the rectifier circuit High voltage magnetic isolation is provided between the corresponding inverter circuit.
The integrated smart current collector according to claim 3 or 4, characterized in that a line reactor for suppressing generation of harmonics is provided between the input switch and the chopper circuit.
The integrated intelligent current collector according to claim 3, wherein at least between the power grid and the fuse, between the fuse or the input switch and the line reactor, A transformer or a varistor is connected in parallel between the wave circuit and the inverter circuit.
The integrated intelligent current collector according to claim 1, wherein the power conversion module, the high voltage safety isolation module, and the control unit of the smart collector bar are disposed in the control box.