New energy mine truck driving control system with double motors combined with seven-gear gearbox

Abstract

The utility model discloses a new energy mine truck driving control system with double motors combined with a seven-gear gearbox, and relates to the technical field of new energy mine truck driving systems. The first motor controller and the second motor controller are both electrically connected with the vehicle control unit VCU; the first motor and the second motor are electrically connected with the first motor controller and the second motor controller respectively, and the peak power of the first motor and the peak power of the second motor are 600 KW; the seven-gear gearbox is connected with the first motor and the second motor, and the seven-gear gearbox is connected with the axle through a transmission shaft; the ATM controller TCU is electrically connected with the vehicle control unit VCU and the gearbox; the first motor and the second motor are matched with the seven-gear gearbox, the working conditions of heavy-load uphill and heavy-load downhill are met, the climbing gradient and the vehicle speed are considered at the same time, most working conditions can be covered, and the transportation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy mining truck drive systems, and in particular to a new energy mining truck drive control system with dual motors and a 7-speed gearbox. Background Art

[0002] As the mainstream product for transporting mineral materials in green mines, new energy mining trucks travel back and forth between mining sites and unloading sites during use. They are characterized by steep slopes, heavy loads, relatively fixed routes, and complex working conditions. To address these harsh operating conditions, power batteries and high-power motors are used to replace the traditional fuel engine power solution. Energy is recovered to charge the battery when going downhill, and battery power is consumed on flat roads and uphill, achieving energy-saving and environmental protection effects.

[0003] In the development history of new energy mining trucks, most single motors and gearboxes with few gears cannot meet the working conditions of different mining areas, resulting in the problem of low transportation efficiency of new energy mining trucks compared to traditional fuel vehicles. Utility Model Content

[0004] In order to solve the existing technical problems, the utility model provides a new energy mining truck drive control system with dual motors and a 7-speed gearbox, comprising:

[0005] Vehicle Controller (VCU);

[0006] The first motor controller and the second motor controller are both electrically connected to the vehicle controller VCU;

[0007] A first motor and a second motor are electrically connected to the first motor controller and the second motor controller respectively, and the peak power of the first motor and the second motor is 600KW;

[0008] a 7-speed gearbox connected to the first motor and the second motor, the 7-speed gearbox being connected to the axle via a transmission shaft;

[0009] The ATM controller TCU is electrically connected to the vehicle controller VCU and the gearbox.

[0010] Furthermore, the first motor and the second motor are arranged in parallel.

[0011] Furthermore, both the first motor and the second motor are permanent magnet synchronous motors.

[0012] Furthermore, the electrical connection is via a CAN bus.

[0013] The beneficial effects of the technical solution provided by the present invention are as follows: the peak power of the first motor and the second motor in the present invention is 600KW, and the gearbox matched with the first motor and the second motor is a 7-speed gearbox, which meets the working conditions of heavy-load uphill and heavy-load downhill, while taking into account the climbing grade and vehicle speed, can cover most working conditions and improve transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a new energy mining truck drive control system with dual motors and a 7-speed gearbox provided by the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] It should be noted that the terms "first" and "second" are used only to distinguish descriptions and should not be understood as indicating or implying relative importance. In addition, in this embodiment, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0018] See also Figure 1 A new energy mining truck drive control system with dual motors and a 7-speed gearbox includes: a vehicle controller VCU, a first motor controller, a second motor controller, a first motor, a second motor, a 7-speed gearbox and an ATM controller TCU.

[0019] The output ends of the first motor and the second motor are connected to the input ends of the gearbox, and the output end of the gearbox is connected to the axle through the transmission shaft. The first motor and the second motor are electrically connected to the first motor controller and the second motor controller respectively. The first motor controller, the second motor controller and the ATM controller TCU are electrically connected to the vehicle controller VCU. The ATM controller TCU is also electrically connected to the gearbox. The ATM controller controls the gear shifting and selection actuator to realize the gear combination inside the gearbox and realize upshifting and downshifting.

[0020] In addition, the brake pedal, accelerator pedal, and handbrake on the new energy mining truck are electrically connected to the vehicle controller VCU. The body of the pure electric mining truck is connected to a vehicle speed sensor, the gear sensor is connected to the gearbox, and the motor shafts of the first motor and the second motor are both connected to speed sensors. The vehicle speed sensor, gear sensor, and speed sensor are electrically connected to the ATM controller TCU.

[0021] It should be noted that, in this embodiment, the first motor and the second motor are connected in parallel and are mainly powered by the power battery system and the storage battery. The vehicle controller VCU is responsible for collecting and processing signals from various parts of the vehicle, and comprehensively judging the driver's intentions based on this information, and then controlling the various subsystems of the vehicle to ensure that the vehicle operates efficiently, stably and safely. The vehicle controller VCU controls the vehicle according to the driver's needs, drives the first motor and the second motor to operate, and drives the vehicle forward.

[0022] The vehicle's brake pedal is connected to a brake pedal sensor, which can be a HOTOAUTO brake pedal position sensor, etc. The brake pedal sensor is electrically connected to the vehicle control unit (VCU). The brake pedal sensor is used to collect brake pedal position information, generate an electrical signal, and send it to the vehicle control unit (VCU). After receiving the brake pedal position signal, the vehicle control unit (VCU) determines the driver's braking intention based on the signal strength and rate of change. The accelerator pedal is connected to an accelerator pedal sensor, which is electrically connected to the vehicle control unit (VCU). The accelerator pedal sensor can be a GFS004N-D accelerator pedal sensor, etc. The accelerator pedal sensor is used to monitor the force and position of the driver's accelerator pedal, and converts it into an electrical signal and sends it to the vehicle control unit (VCU). The vehicle control unit (VCU) determines the driver's forward intention based on the electrical signal. The parking brake is controlled by an electronic button, converting the driver's operating instructions into electrical signals, which are then transmitted to the vehicle control unit (VCU). The vehicle control unit (VCU) accurately controls the locking and release functions of the parking brake based on these signals.

[0023] A vehicle speed sensor is connected to the vehicle body and can be installed in the drive axle housing or the transmission housing. The vehicle speed sensor can be a magnetoelectric sensor, which is used to detect the driving speed of the electric vehicle and convert this information into an electrical signal and transmit it to the ATM controller TCU to facilitate the formulation of control strategies and the display of vehicle speed; the speed sensor model on the first motor and the second motor can be JN338-1000AG, which is used to monitor the operating status and speed of the motor; the gear sensor is used to detect and feedback the current gear information to ensure that the vehicle control system can correctly manage the power output according to the selected gear.

[0024] Furthermore, in the electrical connection of each of the above modules, data interaction is performed through the CAN bus, which can respond to the driver's operation more quickly. At the same time, the CAN bus has a higher reliability for the entire vehicle.

[0025] The vehicle controller VCU controls the power-on and power-off processes. When powering on, the gear is in N and the handbrake is pulled. When the key is in NO, the vehicle modules (vehicle controller VCU, battery management system BMS, first motor controller and second motor controller, ATM controller TCU, etc.) perform self-tests. If the self-test passes, the communication is normal, no fault is reported in any module of the vehicle, and all relays are in the disconnected position. At this time, the vehicle controller VCU sends a power-on command to the battery management system BMS, and the battery management system BMS closes the main negative relay and feeds back the status to the vehicle controller VCU. When the key is in Start, the brake is pressed (the brake pedal opening is greater than 15%), and the vehicle controller VCU sends a power-on command. After the power-on is completed, if the vehicle has no faults, the vehicle controller VCU sends a Ready signal to light up the instrument indicator light. At this time, the vehicle is ready for driving.

[0026] When the vehicle completes the power-on process, the driver releases the handbrake, steps on the brake pedal, shifts into D gear, and steps on the accelerator pedal. At this time, the signal is transmitted to the vehicle controller VCU, and at the same time, the vehicle controller VCU transmits it to the ATM controller TCU, the first motor controller and the second motor controller through the CAN bus. After the ATM controller TCU, the first motor controller and the second motor controller receive the driver's throttle signal command, they combine the current motor speed signal, vehicle speed signal, and gear signal to simulate and adjust the gear in time. At this time, the first motor controller and the second motor controller respectively control the torque output by the first motor and the second motor to drive the gearbox through the drive shaft and transmit it to the axle. The vehicle is in a forward state at this time.

[0027] In addition, in the present invention, the first motor and the second motor are permanent magnet synchronous motors, which have the following main advantages: small size, light weight, high power density, high torque at low speed, high power at high speed, simple maintenance, etc., which meet the needs of mining trucks for motors; and the peak power of the first motor and the second motor is 600KW, full helical gear transmission, high overlap, strong load-bearing capacity, and maximum output torque of 22000Nm; the gearbox matched with the first motor and the second motor is a 7-speed gearbox, which meets the working conditions of heavy load uphill and heavy load downhill, while taking into account the climbing grade and vehicle speed, and can cover most working conditions; among them, gears 2 and 3 can meet more than 80% of the working conditions, gear 1 is the escape gear, and other gears are suitable for operation under no-load high-speed conditions. At the same time, the vehicle controller VCU can also intelligently select the appropriate gear according to signals such as vehicle speed and torque; the maximum input torque of the gearbox is greater than or equal to the maximum output torque of the motor, which can ensure that the performance of the motor is fully reflected.

[0028] It should be noted that compared with the existing technology, this design has improved the transportation efficiency while also improving the driving experience. The 2nd gear can meet the slope of 22%, corresponding to the maximum speed of 30km / h on a flat road. The 2nd gear of the three-speed box system cannot meet this requirement, and the 1st gear must be used. However, the speed of the 1st gear is low, and the maximum speed on a flat road is 13km / h. Under the same slope working range, the climbing speed of the 7-speed box is higher than that of the three-speed box system, and the transportation efficiency is high. When heavily loaded downhill, for the two-speed box system, only two gears are used, which can meet the electric braking requirements, but the energy recovery rate is single and cannot be flexible. If the electric braking is performed with the retarder, it is easy to be fully charged and cause the electric braking to fail. It is necessary to add an eddy current retarder and a braking resistor. The eddy current retarder shares part of the braking torque, and the braking resistor consumes a certain amount of electricity. For a 7-speed gearbox, due to the large number of gears, the vehicle speeds achieved are different. The appropriate gear can be selected according to the downhill braking needs and the retarder can be used for electric braking, thereby achieving more efficient energy conversion and better braking effect. It can meet the electric braking needs of most heavy-load downhill driving, and also improve safety and efficiency. At the same time, there is no need to install an eddy current retarder, saving costs.

[0029] The utility model adopts an electric shifting system, which improves the shifting quality compared to some mining vehicles, solves the problems of long shifting time, gear engagement failure, etc., and makes the shifting smoother.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new energy mining truck drive control system with dual motors and a 7-speed gearbox, characterized in that: include: Vehicle Controller (VCU); The first motor controller and the second motor controller are both electrically connected to the vehicle controller VCU; A first motor and a second motor are electrically connected to the first motor controller and the second motor controller respectively, and the peak power of the first motor and the second motor is 600KW; a 7-speed gearbox connected to the first motor and the second motor, the 7-speed gearbox being connected to the axle via a transmission shaft; The ATM controller TCU is electrically connected to the vehicle controller VCU and the gearbox.

2. The new energy mining truck drive control system with dual motors and a 7-speed gearbox according to claim 1 is characterized in that: The first motor and the second motor are arranged in parallel.

3. The new energy mining truck drive control system with dual motors and a 7-speed gearbox according to claim 1 is characterized in that: The first motor and the second motor are both permanent magnet synchronous motors.

4. The new energy mining truck drive control system with dual motors and a 7-speed gearbox according to claim 1 is characterized in that: The electrical connection is via a CAN bus.

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