CN103754099A - Double-motor multi-mode dynamic coupling driving assembly - Google Patents

Abstract

The invention provides a dual-motor multi-mode power coupling drive assembly. The present invention adopts No. 1 motor 15 and No. 2 motor 3 as the power source of the system. The rotor and the ring gear of the No. 1 motor are integrated together to form the ring gear rotor 8, and the inside is a complete planetary gear structure. The two motors are coaxially arranged, and the locker 4 is used to lock the sun gear and the No. 1 motor 3. The present invention can realize the single driving mode of the No. 1 motor 15, the braking energy recovery mode of the No. 1 motor, and the speed coupling of the two motors. Drive mode, two motor speed coupled braking energy recovery mode. In addition, this power coupling has a compact structure, small volume, and high power density, and can increase the output torque of the motor without changing the main body size of the motor 15, and can meet the vehicle's demand for large torque characteristics of the drive system, and Heavy vehicles require high power density drive systems with limited space quality.

Description

A dual-motor multi-mode power coupling drive assembly

technical field

The invention belongs to the technical field of power assembly components, and in particular relates to a dual-motor power coupling drive assembly. the

Background technique

At present, the driving system of heavy-duty electric vehicles in the field of civil vehicles in my country mainly adopts the form of a large motor plus a transmission. By controlling the speed ratio of the gearbox, the driving torque of the motor is adjusted to meet the requirements of the car's climbing, acceleration and maximum speed. Require. However, this type of drive has stricter requirements on the bearings of large motors. Heavy-duty vehicles such as electric buses mostly work at low speeds, resulting in the motors often working in a low-efficiency working area. Power interruption will occur during the shifting process of the traditional transmission mechanism, which will cause unnecessary impact and affect the riding comfort and other problems. The present invention aims to provide a rotational speed coupling drive structure with simple structure, compact structure, high power density and easy operation. This structure can drive the vehicle through one motor outputting a large torque when the vehicle is running at low speed, and keep the motor working efficiently under the premise of satisfying the vehicle dynamics. At high speed, the system can realize gear shifting without power interruption. The coupling meets the working needs of the vehicle at high speed. the

The Chinese patent application number 201010100671.7 discloses a double-motor speed coupling drive assembly suitable for electric buses, which consists of a simple planetary gear mechanism, two drive motors, and a lock. At low speed, the No. 1 motor is connected with the sun gear of the planetary mechanism, and the locker locks the ring gear. The power is input from the sun gear and output from the planet carrier to realize the deceleration ratio and output large torque; at high speed, the locker unlocks the gear. The power of motor No. 1 is input to the sun gear, and the power of motor No. 2 is input to the ring gear of the planetary gear mechanism connected to it. The speed coupling of the input power of the two motors is realized through the planetary gear mechanism; the structure of this scheme is simple and reduces Torque capacity and power of a single motor. But there are following disadvantages: the output torque of the No. 1 motor is limited by the torque capacity of the No. 2 motor at high speed. At low speed, the No. 1 motor has to switch the working mode when the vehicle speed is not high, which leads to frequent shifting of vehicles that often work at low speeds, which affects comfort. Therefore, when the vehicle is running at a low speed, the vehicle shifts gears frequently, and when the vehicle is running at a high speed, the utilization rate of the No. 1 motor is low. Another disadvantage is that there is a sudden change in torque during the shifting process, which also affects comfort. the

The Chinese patent application number 201210024534.9 discloses a dual-motor coupling speed change device, which consists of a set of planetary gear mechanisms, a set of fixed-axis gear mechanisms, two drive motors, a locker, and two clutches. Through joint control of two clutches and a lock-up device, the torque coupling output and speed coupling output of the dual motors, as well as the switching between the two output modes can be realized. This scheme realizes gear shifting without power interruption when the vehicle is running; at low speeds, it achieves high torque output through dual-motor torque coupling, and at high speeds through dual-motor speed coupling to achieve high-speed output; whether it is torque coupling or speed Under coupling, both motors participate in the work, and the utilization rate is high. However, there is a disadvantage of complex mechanical structure; when switching between the torque coupling mode and the rotational speed coupling mode, two clutches and a locker need to be controlled at the same time, and the linkage control device and operation are complicated. the

The Chinese patent with the application number CN201310117747.0 discloses a dual-motor coupling transmission device, which consists of two sets of planetary rows, two motors and a locker. The torque and speed coupling of the system are realized through the control of the locker. . At low speeds, high torque output is achieved through dual-motor torque coupling, and high-speed output is achieved through dual-motor speed coupling at high speeds; the utilization efficiency of the motors is high. But there are complex mechanical structures, low power density, and insufficient compact structure. the

Contents of the invention

The present invention aims to provide a dual-motor multi-mode coupling drive structure with high power density, simple structure, and easy operation, so that a relatively large motor can work and output large torque when the car is running at low speed; , outputting high rotational speed; thus making the common working condition of the vehicle work in the high-efficiency working area of the motor; overcoming the problems of low power density, complex structure, cumbersome control, and power interruption in shifting of existing transmission devices. the

The purpose of the present invention is achieved like this:

The No. 1 integrated motor (15) and the No. 2 motor (3) are coaxially arranged. The power of the No. 1 integrated motor (15) is transmitted to the rotor ring gear (8) through the stator (6) and the magnetic field, and the power of the No. 2 motor (3) is transmitted to the sun gear (10) through the lock (4). The power of each motor is coupled to the planetary carrier (14) through the planetary row inside the rotor (8), and the power of the planetary carrier (14) is transmitted to the drive axle (11) through the final reducer (12). . The locking device (4) is used for switching between various working modes of the dual-motor multi-mode coupling drive structure. This structure can reduce the volume and mass of the drive system, increase the power density of the system, and effectively realize the requirements of multiple working modes and high power density of the vehicle. the

Description of drawings

The accompanying drawing is a structural diagram of the dual-motor multi-mode integrated coupling drive structure. the

Detailed ways

Now further illustrate in conjunction with accompanying drawing. the

The present invention is composed of energy storage device (1), controller (2), and controller (13), No. 2 motor (3), locker (4), No. 1 motor (15), final reducer (12 ), and drive axle (11). Among them, the No. 1 motor (15) consists of a motor casing (5), a stator (6), a ring gear rotor (8), a magnetic steel (7), a planetary gear (9), a sun gear (10), and a planet carrier (14) composition. It is characterized in that the No. 1 motor (15) and the No. 2 motor (3) are coaxially arranged. The power of the No. 1 motor (15) is transmitted to the rotor ring gear (8) through the stator (6) and the magnetic field, and the power of the No. 2 motor (3) is transmitted to the sun gear (10) through the lock (4). The power of each motor is coupled to the planetary carrier (14) through the planetary row inside the rotor (8), and the power of the planetary carrier (14) is transmitted to the drive axle (11) through the final reducer (12). . The locking device (4) is used for switching between various working modes of the dual-motor multi-mode coupling drive structure. the

The controller (2) and the controller (13) control the working state and power output of the No. 1 motor (15) and the No. 2 motor (3), and the power output of the No. 2 motor (3) is specifically controlled by the lock ( 4) Achieved. the

Multiple working modes of the dual motors can be obtained by controlling the locker (4), and the combined states are shown in Table 1, where "1" means the locker is in the locked state, and "0" means the locker is in the unlocked state , "M" indicates that the motor is under electric control, "G" indicates that the motor is under power generation control, and "C" indicates that the motor is off. the

Table 1 Working mode

No. 1 motor drive mode: the energy storage device (1) outputs energy, the motor controller (13) controls the No. 1 motor (15) to work in the electric mode according to the driver's command, the No. 2 motor (12) stops working, and the No. 1 motor (15) The output power is output to the drive axle (11) through the ring gear rotor (8), the planetary gear (9), the planet carrier (14), the final reducer (14);

No. 1 motor regenerative braking working mode: the motor controller (13) controls the No. 1 motor (15) to work in the power generation mode, and the inertia torque of the vehicle is transmitted to the ring gear rotor ( 8), the motor controller (13) controls the power generation of the No. 1 motor (15) according to the vehicle regenerative braking control logic, and outputs direct current to charge the energy storage device (1). the

Double-motor speed coupling drive working mode: the energy storage device (1) outputs energy, the lock (4) is unlocked, and the motor controller controls the No. 1 motor (15) and No. 2 motor (3) to work in the electric state according to the driver's command , the power of the No. 1 motor (15) is output to the drive axle (11) through the ring gear rotor (8), the planetary gear (9) and the planetary carrier (14). The power of the second motor (3) is output to the drive axle (11) through the lock (4), the sun gear (10), and the planet carrier (14);

Double-motor speed coupling regenerative braking working mode: the motor controller controls the No. 1 motor (15) and No. 2 motor (3) to work in the power generation state, and the vehicle inertia torque is shunted through the drive axle (11) and the planetary carrier (14) Output, one is routed to the No. 1 sun gear (10), the lock device (4) drives the No. 2 motor (3) to rotate, and the other route is routed to the planetary gear (9) of the planetary gear mechanism to drive the ring gear rotor of the No. 2 motor (8) Rotate, the motor controller (13) controls the power generation of the No. 1 motor (15) and the No. 2 motor (12) according to the vehicle regenerative braking control logic, and outputs direct current to charge the energy storage device (1). the

The rotor structure of the No. 1 motor (15) and the planetary row are coupled together to form a ring gear rotor (8), which can be an integral structure or can be detachable. The interior of the rotor is a complete planetary gear mechanism. When the system is matched, the output shaft, that is, the planet carrier (14), can be increased without changing the size of the main body of the motor by matching the characteristic parameters of the planetary row according to the torque requirement. output torque. This kind of integration can greatly improve the power density and compactness of the system. the

The final drive and differential assembly connected behind the planet carrier (14) can be used to drive conventional vehicles. The wheels are connected behind the planetary carrier (14), and two sets of the system assembly can be used to realize double-sided independent drive, so as to meet the power demand of the heavy-duty vehicle for the high-power drive system. the

The second motor (3) can be replaced by a traditional motor as a power source, and now the controller (2) is no longer needed. At this time, the system can work in the engine (3) and No. 1 motor (15) speed coupling drive mode, the engine (3) drives and the No. No. motor regenerative braking mode. When the engine (3) and the No. 1 motor (15) are in the speed coupling driving mode, the lock (4) is unlocked, and the transmission path of the power drive is the same as the power transmission path when the two motors are driven in claim 3; when the engine (3) The power of the engine (3) passes through the sun gear (10) and the planetary gear (9) in the driving mode of the motor No. The transmission is transmitted to the drive axle, and the other is transmitted to the motor (15) through the ring gear rotor. The motor controller (13) controls the power generation of the No. 1 motor (15) according to the regenerative braking control logic of the vehicle, and outputs DC power as an energy storage device (1) Charging; when the No. 1 motor (15) is in the single driving mode and the No. 1 motor is in the regenerative braking mode, the working conditions are the same as those of the motor (15) in claim 2. the

From the above working principle, it can be seen that the dual-motor multi-mode integrated coupling drive structure can realize multiple tasks of single-motor drive, single-motor braking energy recovery braking, dual-motor speed coupling drive, and dual-motor speed coupling braking energy recovery. Mode, small size, compact structure, high power density, which can meet the high power and high power density drive requirements of the vehicle. the

Claims (6)

1. double-motor multi-mode power coupling drives an assembly, closed-center system (1), controller (2) and (13), No. two motors (3), mechanical brake (4), a motor (15), main reduction gear (12) and drive axle (11), consists of.Wherein a motor (15) is comprised of motor casing (5), stator (6), gear ring rotor (8), magnet steel (7), satellite gear (9), sun wheel (10), pinion carrier (14).It is characterized in that a motor (15) and No. two motors (3) are coaxially arranged.The power of a motor (15) is through stator (6), pass to rotor gear ring (8) by magnetic field, the power of No. two motors (3) passes to sun wheel (10) through mechanical brake (4), the power of two motors is undertaken, after rotating speed coupling, power is passed to pinion carrier (14) by the inner planet row of rotor (8), and the power of pinion carrier (14) is passed to drive axle (11) through main reduction gear (12) by power.Mechanical brake (4) is in order to realize the switching between the various mode of operations of double-motor multi-model coupling drive configuration.This structure can reduce volume and the quality of drive system, improves the power density of system, and actv. is realized vehicle multiple-working mode and demand high power density.

2. according to the described double-motor multi-mode of claim 1 power coupling, drive assembly, it is characterized in that: an electrical machine working mode is divided into a motor and drives mode of operation and an electric power generation mode of operation, under an electrical machine working mode, mechanical brake (4) locking sun wheel;

Wherein at a motor, drive under mode of operation, closed-center system (1) output energy, electric machine controller (13) is operated in electric model according to a motor of driver command control (15), No. two motors (12) quit work, a motor (15) outputting power through gear ring rotor (8), satellite gear (9), pinion carrier (14), main reduction gear (14), output to drive axle (11);

Under a motor regenerative brake mode of operation, electric machine controller (13) is controlled a motor (15) and is operated in power generation mode, vehicle inertia torque through drive axle (11), pinion carrier (14), pass to gear ring rotor (8), electric machine controller (13) is according to the electric energy generated of a car load regenerative brake control logic motor of control (15), and to export direct current (DC) be closed-center system (1) charging.

3. according to the described double-motor multi-mode of claim 1 power coupling, drive assembly, it is characterized in that: motor rotating speed coupling work mode is divided into rotating speed couple drive mode of operation and rotating speed coupled electricity-generation mode of operation, under rotating speed coupling work mode, mechanical brake (4) release sun wheel (10);

Motor rotating speed couple drive mode of operation, closed-center system (1) output energy, mechanical brake (4) release, electric machine controller is operated in motoring condition according to a motor of driver command control (15) and No. two motors (3), and a motor (15) power exports drive axle (11) to through gear ring rotor (8), satellite gear (9), pinion carrier (14).Then No. two motors (3) power export drive axle (11) to through mechanical brake (4), sun wheel (10), pinion carrier (14);

Regenerative brake motor rotating speed coupled electricity-generation mode of operation, a motor of motor controller controls (15) and No. two motors (3) are operated in generating state, vehicle inertia torque is through drive axle (11), shunting output after pinion carrier (14), one No. one, route sun wheel (10), mechanical brake (4) drags No. two motors (3) rotation, the satellite gear (9) of another route sun and planet gear, drag gear ring rotor (8) rotation of No. two motors, electric machine controller (13) is according to the electric energy generated of a car load regenerative brake control logic motor of control (15) and No. two motors (12), and to export direct current (DC) be closed-center system (1) charging.

4. according to the integrated couple drive assembly of the described double-motor multi-mode of claim 1, it is characterized in that: the rotor structure of a motor (15) and planet row combine and be coupled into a gear ring rotor (8), it can be that an overall structure can be also detachable.The inside of rotor is a complete sun and planet gear, in system matches, can, according to the demand of torque, by the characteristic parameter of coupling planet row, realize and in the situation that not changing motor size of main body, increase the output torque that output shaft is pinion carrier (14).This integration mode can improve the power density of system and the compactedness of structure greatly.

5. according to the integrated couple drive assembly of the described double-motor multi-mode of claim 1, it is characterized in that: after pinion carrier (14), connecting main reduction gear and differential assembly can be for driving conventional truck.After pinion carrier (14), connect wheel, with two, overlap these system synthesis and can realize bilateral individual drive, to meet the power demand of heavy-duty vehicle to high-power driving system.

6. according to the integrated couple drive assembly of the described double-motor multi-mode of claim 1, it is characterized in that: No. two motors (3) can replace with traditional driving engine as propulsion source, and this Time Controller (2) no longer needs.Now this system can be operated in driving engine (3) and a motor (15) rotating speed couple drive pattern, and driving engine (3) drives and a motor (15) generating mode of operation, and a motor (15) is drive pattern separately, a motor regenerative brake pattern;

When driving engine (3) and a motor (15) rotating speed couple drive pattern, mechanical brake (4) is removed locking, and power transfer path when power operated bang path drives with two motors in claim 3 is identical;

When driving engine (3) driving and a motor (15) generating mode of operation, the power of driving engine (3) is via sun wheel (10), satellite gear (9), then divide two-way, lead up to pinion carrier (14), main reduction gear passes to drive axle, the gear ring rotor of separately leading up to is delivered to motor (15), electric machine controller (13) is according to the electric energy generated of a car load regenerative brake control logic motor of control (15), and to export direct current (DC) be closed-center system (1) charging;

The service condition of the independent drive pattern of a motor (15) and the service condition of a motor regenerative brake pattern and the motor (15) of claim 2 is identical.

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