CN221125112U

CN221125112U - Bus interference isolator

Info

Publication number: CN221125112U
Application number: CN202323236508.5U
Authority: CN
Inventors: 牟刚; 武涛; 李衍; 罗鹏
Original assignee: Nanning Nixing Technology Co ltd
Current assignee: Nanning Nixing Technology Co ltd
Priority date: 2023-11-29
Filing date: 2023-11-29
Publication date: 2024-06-11
Anticipated expiration: 2033-11-29

Abstract

The utility model relates to the technical field of motorcycles, in particular to a bus interference isolator which comprises a main power supply, a first isolation power supply, a second isolation power supply, a main control unit, a first CAN transceiver unit and a second CAN transceiver unit, wherein the main power supply is used for independently supplying power to the first isolation power supply, the second isolation power supply and the main control unit respectively, the first isolation power supply is used for independently supplying power to the first CAN transceiver unit, and the second isolation power supply is used for independently supplying power to the second CAN transceiver unit; one end of the first CAN transceiver unit is electrically connected with the motor controller through a CAN bus, and the other end of the first CAN transceiver unit is connected with the main control unit; one end of the second CAN transceiver unit is electrically connected with each communication target unit of the vehicle through a CAN bus, and the other end of the second CAN transceiver unit is connected to the main control unit. The utility model can eliminate interference, thereby ensuring the reliability and stability of signals and simultaneously maintaining the stability and reliability of the system.

Description

Bus interference isolator

Technical Field

The utility model relates to the technical field of motorcycles, in particular to a bus interference isolator.

Background

The motorcycle is flexible, convenient and fast, and is one of the common vehicles. The motorcycles used in daily life are mainly divided into motor motorcycles and electric motorcycles according to different power sources; the power source of the electric motorcycle is electric energy, and all parts of the electric motorcycle are electric devices. Because when two independent electrical systems transmit signals over long distances, the respective systems have independent power and reference ground planes and cannot be commonly grounded through the wiring harness, common mode voltage interference can occur in the signals transmitted between the two independent systems. If the interference cannot be eliminated, the CAN bus communication is abnormal, so that the vehicle component cannot work normally.

Disclosure of utility model

The utility model aims to provide a bus interference isolator which can eliminate interference, so that the reliability and stability of signals are ensured and the stability and reliability of a system are also maintained.

In order to achieve the above purpose, a bus interference isolator is provided, which comprises a main power supply, a first isolation power supply, a second isolation power supply, a main control unit, a first CAN transceiver unit and a second CAN transceiver unit, wherein the main power supply respectively supplies power to the first isolation power supply, the second isolation power supply and the main control unit independently, the first isolation power supply supplies power to the first CAN transceiver unit independently, and the second isolation power supply supplies power to the second CAN transceiver unit independently; one end of the first CAN transceiver unit is electrically connected to a motor controller of the vehicle through a CAN bus, and the other end of the first CAN transceiver unit is connected to the main control unit; one end of the second CAN transceiver unit is electrically connected with each communication target unit of the vehicle through a CAN bus, and the other end of the second CAN transceiver unit is connected to the main control unit.

Further, the main control unit is an MCU.

Further, the communication target unit includes a car machine, ABS, BMS, OBC, and a car light.

Further, the first CAN transceiver unit and the second CAN transceiver unit are CAN isolation transceiver modules.

Principle and advantage:

1. According to the scheme, electrical isolation is realized through the CAN bus interference isolator so as to separate and process data signals. The bus interference isolator is equipment which is connected to the CAN bus and used for isolating and protecting, and solves the problem of common mode voltage interference of transmission signals between two independent systems. The type of isolation protection commonly employed is electrical isolation. It can separate and transmit signals to different parts, thereby maintaining the stability and reliability of the system. The electric isolation is to isolate the power supply from the power circuit, i.e. the power circuit branch circuit is isolated from the whole electric system, so that the power circuit branch circuit is an isolated independent non-grounding safety system to isolate interference.

2. Each isolated power supply is independently supplied to prevent damage to other modules caused by high voltage discharge or other reasons. The purpose of this is to ensure that each module works independently and is not disturbed.

Drawings

FIG. 1 is a logic block diagram of a bus interference isolator according to an embodiment of the present utility model;

fig. 2 is a logic block diagram of the motor controller, the bus interference isolator, and the respective communication target units of the vehicle.

Detailed Description

The following is a further detailed description of the embodiments:

Examples

The bus interference isolator is applied to an electric motorcycle and basically comprises a main power supply, a first isolation power supply (isolation power supply 1), a second isolation power supply (isolation power supply 2), a main control unit, a first CAN transceiver unit (CAN transceiver unit 1) and a second CAN transceiver unit (CAN transceiver unit 2) as shown in figures 1 and 2. The main power supply is used for independently supplying power to the first isolated power supply, the second isolated power supply and the main control unit respectively, the first isolated power supply is used for independently supplying power to the first CAN transceiver unit, and the second isolated power supply is used for independently supplying power to the second CAN transceiver unit; one end of the first CAN transceiver unit is electrically connected to a motor controller of the vehicle through a CAN bus, and the other end of the first CAN transceiver unit is connected to the main control unit; one end of the second CAN transceiver unit is electrically connected with each communication target unit of the vehicle through a CAN bus, and the other end of the second CAN transceiver unit is connected to the main control unit.

The main control unit is an MCU. The communication target units comprise car machines, ABS, BMS, OBC and car lights. The first CAN transceiver unit and the second CAN transceiver unit are conventional CAN isolation transceiver modules. Model selection: isolation power sources B1212S_2W, B0505S_1W, isolation CAN chip (CAN isolation transceiver module) CA_IS3052G, and master control unit KF32A151KQS.

According to the scheme, electrical isolation is realized through the CAN bus interference isolator so as to separate and process data signals. The bus interference isolator is equipment which is connected to the CAN bus and used for isolating and protecting, and solves the problem of common mode voltage interference of transmission signals between two independent systems. The type of isolation protection commonly employed is electrical isolation. It can separate and transmit signals to different parts, thereby maintaining the stability and reliability of the system. The electric isolation is to isolate the power supply from the power circuit, i.e. the power circuit branch circuit is isolated from the whole electric system, so that the power circuit branch circuit is an isolated independent non-grounding safety system to isolate interference. Each isolation power supply independently supplies power to the corresponding CAN isolation transceiver module, and other modules are prevented from being damaged due to high-voltage discharge or other reasons. The purpose of this is to ensure that each module works independently and is not disturbed.

The foregoing is merely an embodiment of the present utility model, and general knowledge of specific structures and features well known in schemes is not described in any way herein, so that a person of ordinary skill in the art would know all of the prior art to which the present utility model pertains before the application date or priority date, and would be able to learn all of the prior art in this field, and have the ability to apply conventional experimental means before this date, so that a person of ordinary skill in the art could complete and implement this scheme in combination with his own capabilities, given the teachings of the present utility model, and some typical known structures or known methods should not be an obstacle to the implementation of the present utility model by those of ordinary skill in this art. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. A bus interference isolator, characterized by: the power supply system comprises a main power supply, a first isolation power supply, a second isolation power supply, a main control unit, a first CAN transceiver unit and a second CAN transceiver unit, wherein the main power supply is used for independently supplying power to the first isolation power supply, the second isolation power supply and the main control unit respectively, the first isolation power supply is used for independently supplying power to the first CAN transceiver unit, and the second isolation power supply is used for independently supplying power to the second CAN transceiver unit; one end of the first CAN transceiver unit is electrically connected to a motor controller of the vehicle through a CAN bus, and the other end of the first CAN transceiver unit is connected to the main control unit; one end of the second CAN transceiver unit is electrically connected with each communication target unit of the vehicle through a CAN bus, and the other end of the second CAN transceiver unit is connected to the main control unit.

2. A bus interference isolator as claimed in claim 1, wherein: the main control unit is an MCU.

3. A bus interference isolator as claimed in claim 1, wherein: the communication target units comprise car machines, ABS, BMS, OBC and car lights.

4. A bus interference isolator as claimed in claim 1, wherein: the first CAN transceiver unit and the second CAN transceiver unit are CAN isolation transceiver modules.