Electric drive axle running-in rack

Abstract

An electric drive bridge running-in rack comprises a direct-current power supply cabinet connected with a power grid, the direct-current power supply cabinet is connected with a junction box, the junction box is connected with a first load motor controller, a second load motor controller and a drive motor controller, the first load motor controller is connected with a first load motor, and the second load motor controller is connected with a second load motor. The first load motor controller is connected with a first load motor, the second load motor controller is connected with a second load motor, and the first load motor and the second load motor are located on the two sides of the rack respectively and connected with the driving motor through the middle electric drive bridge. The beneficial effects of the utility model are that: 1, the energy consumption is low: taking a 5t commercial vehicle electric drive axle as an example, the overall power of the rack can be reduced to 20KW; 2, the cost is low: a commercial vehicle direct drive motor and an MUC control system are adopted as a load motor, and the cost is reduced to 50,000;

Description

Technical Field

[0001] The utility model relates to an electric drive axle running-in bench. Background Art

[0002] The existing technical solution for the electric drive axle loading and running-in test bench is: generally, the wheel-side load motor inverter control and the drive motor use MCU control method. The overall test bench power is composed of the drive motor power + load motor power; taking the 5t electric drive axle loading test bench as an example, the load motor rated power is: 180KW, the drive motor uses a DC power supply with a rated power of 100KW, the total test bench power is 280KW, and the main circuit power distribution of the electric drive test bench is matched to 300KW, which has high energy consumption.

[0003] In addition, the load motor generally uses Siemens inverter and motor, and the cost of a set of test benches exceeds 500,000, which is expensive.

[0004] Therefore, the existing electric drive axle loading running-in test bench technical solution matches the test bench main circuit power distribution to 300KW, which has high energy consumption. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to solve the problems of high energy consumption of an electric drive axle loading stand and high cost of a load motor, and provide an electric drive axle running-in stand.

[0006] The technical solution of the utility model is specifically as follows:

[0007] The electric drive bridge running-in test bench includes a DC power supply cabinet connected to the power grid, the DC power supply cabinet is connected to the junction box, and the junction box is respectively connected to the first load motor controller, the second load motor controller and the drive motor controller, wherein the first load motor controller is connected to the first load motor, and the second load motor controller is connected to the second load motor. The first load motor and the second load motor are respectively located on both sides of the test bench, and the first load motor and the second load motor are connected to the drive motor through the intermediate electric drive bridge.

[0008] The first load motor, the second load motor and the drive motor are all connected to batteries, and the batteries are connected to a DC power supply cabinet.

[0009] The first load motor controller, the second load motor controller and the drive motor controller are connected to a host computer and an on-board diagnostic system OBD. The host computer is also connected to a vehicle controller VCU.

[0010] The first load motor and the second load motor are both commercial vehicle direct drive motors.

[0011] The beneficial effects of the utility model are:

[0012] 1. Low energy consumption: Taking a 5t commercial vehicle electric drive axle as an example, the overall power of the test bench can be reduced to 20KW;

[0013] 2. Low cost: The load motor adopts commercial vehicle direct drive motor and MUC control system, and the cost is reduced to 50,000. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall principle diagram of the utility model;

[0015] Figure 2 It is the bench topology and high and low voltage schematics;

[0016] Figure 3 This is the test bench network topology diagram. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the electric drive bridge running-in test bench includes a DC power supply cabinet connected to the power grid, the DC power supply cabinet is connected to the junction box, and the junction box is respectively connected to the first load motor controller, the second load motor controller and the drive motor controller, wherein the first load motor controller is connected to the first load motor, the second load motor controller is connected to the second load motor, the first load motor and the second load motor are respectively located on both sides of the test bench, and the first load motor and the second load motor are connected to the drive motor through the intermediate electric drive bridge.

[0019] Furthermore, the first load motor, the second load motor and the drive motor are all connected to batteries, and the batteries are connected to a DC power supply cabinet.

[0020] Furthermore, the first load motor controller, the second load motor controller and the drive motor controller are connected to a host computer and an on-board diagnostic system OBD, and the host computer is also connected to a vehicle controller VCU.

[0021] It should be noted that the first load motor and the second load motor are both direct-drive motors for commercial vehicles.

[0022] The working principle of this utility model is:

[0023] The load motors on either side of the gantry utilize two commercial vehicle direct-drive motors, while the center drive motor utilizes a motor built into the electric drive bridge. These motors are controlled individually by three MCUs (motor controllers), with the upper-level control provided by the vehicle control unit (VCU) controlling the coordinated operation of the motors. Furthermore, the three motors share a common DC power supply via a junction box. During gantry operation, the center drive motor outputs power for consumption, while the load motors on either side utilize a generator mode to directly feed back power to the drive motors, significantly reducing the gantry's overall energy consumption.

[0024] Taking a 5-ton commercial vehicle electric drive axle as an example, the conventional test bench power is 280kW. With the new technology, the drive motor consumes 100kW, and the load motors on both sides generate 80kW of feedback power, reducing the overall power consumption to 20kW. Furthermore, the load motors use commercial vehicle direct-drive motors and a MUC control system, reducing costs to 50,000 yuan.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. Electric drive axle running-in test bench, characterized by: It includes a DC power supply cabinet connected to the power grid, the DC power supply cabinet is connected to the junction box, and the junction box is respectively connected to the first load motor controller, the second load motor controller and the drive motor controller, wherein the first load motor controller is connected to the first load motor, the second load motor controller is connected to the second load motor, the first load motor and the second load motor are respectively located on both sides of the test bench, and the first load motor and the second load motor are connected to the drive motor through an intermediate electric drive bridge.

2. The electric drive axle running-in test bench according to claim 1, characterized in that: The first load motor, the second load motor and the drive motor are all connected to batteries, and the batteries are connected to a DC power supply cabinet.

3. The electric drive axle running-in test bench according to claim 1, characterized in that: The first load motor controller, the second load motor controller and the drive motor controller are connected to a host computer and an on-board diagnostic system OBD. The host computer is also connected to a vehicle controller VCU.

4. The electric drive axle running-in test bench according to claim 1, characterized in that: The first load motor and the second load motor are both commercial vehicle direct drive motors.

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