CN104442342B - The planetary bimodulus hybrid power system of double-rotor machine - Google Patents

Abstract

The invention discloses a dual-rotor motor planetary dual-mode hybrid power system, which is composed of an engine, a No. 1 motor, a No. 2 motor, a front planetary row, a rear planetary row, an output gear, an inverter, a super capacitor and a lock composition. The No. 2 motor is a double-rotor motor, including an inner rotor, a stator, and an outer rotor; the front planetary row includes a front sun gear, a front planet carrier, a front planetary wheel, and a front ring gear; the rear planetary row includes a rear sun gear. wheel, rear planetary carrier, rear planetary wheel and rear ring gear. The present invention adopts the double-rotor motor to realize the dual-mode, the structure is simple and compact, only one locking device is easy to control, and the cost is low; under the condition of the same vehicle performance requirements, the present invention can select the peak torque and the peak speed The small No. 2 motor reduces the requirements of the system on the driving motor; the invention can lock the No. 1 motor when the speed is close to zero, avoiding the inefficient work of the No. 1 motor and improving the system efficiency; the invention uses Dual-rotor motor, the inner and outer rotors can participate in regenerative braking at the same time, which can recover braking energy more effectively.

Description

Dual-rotor motor planetary dual-mode hybrid power system

technical field

The invention relates to a hybrid vehicle, in particular to a dual-rotor motor planetary dual-mode hybrid power system.

Background technique

Facing the current situation of energy shortage and increasingly serious environmental pollution, applying hybrid technology to vehicles is a more effective energy-saving solution at present. Among them, the hybrid power system can make the hybrid vehicle have the best overall performance. However, the power system of the current hybrid hybrid vehicle has the disadvantages of high requirements on the motor, complex structure, difficult control, and low system reliability.

Contents of the invention

The object of the present invention is to provide a dual-rotor motor planetary dual-mode hybrid power system.

The invention is composed of an engine, a No. 1 motor, a No. 2 motor, a front planetary row, a rear planetary row, an output gear, an inverter, a supercapacitor and a lock. The No. 2 motor is a double-rotor motor, including an inner rotor, a stator, and an outer rotor; the front planetary row includes a front row of sun gears, a front row of planetary carriers, a front row of planetary gears, and a front row of ring gears; the rear row of planetary rows Including the rear sun gear, the rear planet carrier, the rear planet gear and the rear ring gear; the front ring gear and the rear ring gear share a ring gear base; the engine is connected to the front planet carrier through the input shaft connection; the front sun gear is connected to the No. 1 motor, one end of the locker is connected to the shaft of the front sun gear, and the other end of the locker is fixedly connected to the frame; the rear sun gear is connected to the inner rotor of the No. 2 motor , the rear planet carrier is fixedly connected to the stator of the No. 2 motor, and the rear ring gear is connected to the outer rotor of the No. 2 motor; the supercapacitor is connected to the No. 1 motor and the No. 2 motor respectively through the inverter; the ring gear base The output gear on the output power to the transaxle.

Compared with prior art, the beneficial effects of the present invention are:

1. Compared with the existing hybrid power system, the present invention adopts a dual-rotor motor to realize dual-mode, with simple and compact structure, only one locker, easy to control, and low cost;

2. Under the condition that the vehicle performance requirements are the same, the present invention can select the No. 2 motor with smaller peak torque and smaller peak speed, which reduces the system's requirements for the drive motor;

3. The present invention can lock the No. 1 motor when its speed is close to zero, avoiding the inefficient work of the No. 1 motor and improving the system efficiency;

4. The present invention uses a double-rotor motor, and the inner and outer rotors can participate in regenerative braking at the same time, which can recover braking energy more effectively.

Description of drawings

Fig. 1 is a schematic diagram of the structural composition and working principle of the present invention.

Fig. 2 is a power transmission route diagram of the engine stationary start mode of the present invention.

Fig. 3 is a power transmission route diagram of the engine running start mode of the present invention.

Fig. 4 is a power transmission roadmap of the pure electric mode of the present invention.

Fig. 5 is a power transmission route diagram of the power direct transmission mode of the present invention.

Fig. 6 is a power transmission route diagram of the power split mode of the present invention.

Fig. 7 is a power transmission route diagram of the combined driving mode under high-load driving according to the present invention.

Fig. 8 is a power transmission route diagram of the combined driving mode under the highest speed running of the present invention.

FIG. 9 is a power transmission route diagram of the regenerative braking mode of the present invention.

detailed description

See also shown in Fig. 1, be an embodiment of the present invention, this embodiment is made up of engine 1, No. 1 motor 3, No. 2 motor 12, front planet row, rear planet row, output gear 16, inverter 17, super Composed of capacitor 18 and lock 19, the No. 2 motor 12 is a double-rotor motor, including an inner rotor 13, a stator 14 and an outer rotor 15; the front planetary row includes a front row sun gear 4, a front row planet carrier 7, The front planetary gear 5 and the front ring gear 6; the rear planetary row includes the rear sun gear 11, the rear planet carrier 10, the rear planetary gear 8 and the rear ring gear 9; the front ring gear 6 and The rear ring gear 9 shares a ring gear base; the engine 1 is connected to the front planet carrier 7 through the input shaft 2; the front sun gear 4 is connected to the No. 1 motor 3, and one end of the lock 19 is connected to the front row The sun gear 4 is connected to the rotating shaft, and the other end of the locker 19 is fixedly connected to the frame; the rear sun gear 11 is connected to the inner rotor 13 of the No. 2 motor, and the rear planet carrier 10 is fixedly connected to the No. 2 motor stator 14. The ring gear 9 is connected to the outer rotor 15 of the No. 2 motor; the supercapacitor 18 is connected to the No. 1 motor 3 and the No. 2 motor 12 through the inverter 17; the output gear 16 on the ring gear base outputs power to the drive bridge.

Working process and principle of the present invention are as follows:

1. Engine start mode

According to the running status of the vehicle, the engine start mode is divided into static start and driving start. The common features of these two starting methods are: the lock device 19 is separated, the supercapacitor 18 is discharged, and the No. 1 motor 3 works in the form of an electric motor to convert electric energy into mechanical energy, and the power passes through the front sun gear 4 and the front planetary gear. 5. The front planetary carrier 7 is transmitted to the engine 1, and the engine 1 starts. The difference between the two sub-modes is: No. 2 motor 12 does not work when starting at rest, the speed of the front row ring gear 6 and the rear row ring gear 9 is zero, and the power transmission route is shown in Figure 2; Working in the form of a motor, the speed of the front ring gear 6 and the rear ring gear 9 is not zero, and the power transmission route is shown in Figure 3.

2. Pure electric mode

The pure electric mode is mainly used when the supercapacitor 18 state of charge (SOC) value is high, the vehicle starts, runs under low load and reverses. In this mode, the lock 19 is separated, the supercapacitor 18 is discharged, the inner rotor 13 of the second motor 12 works in the form of an electric motor, and converts electrical energy into mechanical energy, and the power passes through the rear sun gear 11, rear planetary gear 8, The deceleration and torque increase of the rear ring gear 9 is transmitted to the output gear 16, and then output to the vehicle drive axle, the engine 1 and the front planetary carrier 7 are fixed, and the No. 1 motor 3 and the front sun gear 4 are idling. When reversing, No. two motors 12 counter-rotate, and other processes are identical. In this mode, all the energy required for the vehicle to run comes from the supercapacitor 18, and the power transmission route is shown in FIG. 4 .

3. Engine alone driving mode

The engine-only driving mode is mainly used for medium-load driving and low-load cruising when the SOC value of the super capacitor 18 is low. According to the vehicle's operating conditions, the engine-only driving mode is divided into two sub-modes: direct power transmission and power splitting . When the vehicle is running with a medium load and the required power of the vehicle is in the high-efficiency zone of the engine, it is in the direct power transfer mode; when the vehicle is cruising with a low load, the power demand of the vehicle is lower than the minimum power provided by the engine in the high-efficiency zone, and the supercapacitor 18 When the state of charge (SOC) value is low, it is the power split mode.

The common features of these two sub-modes are: the engine 1 is working, and the power is transmitted to the output gear 16 through the input shaft 2, the front planetary carrier 7, the front planetary gear 5, and the front ring gear 6, and then output to the drive axle of the vehicle. All the power required for the running of the vehicle comes from the engine 1; the rear ring gear 9, the rear sun gear 11 and the second motor 12 run idly. The difference between the two sub-modes is: when the power is directly transmitted, the lock 19 is engaged, the No. 1 motor 3 and the front sun gear 4 do not work, and all the power output by the engine 1 is used to drive the vehicle. The power transmission route is shown in Figure 5 When the power is divided, the locking device 19 is separated, and the first motor 3 works in the form of a generator to convert mechanical energy into electrical energy. A part of the power output by the engine 1 is used to drive the vehicle, and the other part is stored in the supercharger in the form of electrical energy. In the capacitor 18, the vehicle is in the electronic continuously variable transmission state at this time, and the power transmission route is shown in FIG. 6 .

4. Joint drive mode

Combined drive mode is mainly used for high-load driving and top speed driving. When the vehicle is running under a high load, the locking device 19 is engaged, the No. 1 motor 3 and the sun gear 4 do not work, the supercapacitor 18 discharges, and the inner rotor of the No. 2 motor 12 works in the form of an electric motor to convert electrical energy into mechanical energy. Drive the vehicle together with the engine 1, and the power transmission route is shown in Figure 7. When the vehicle is running at the highest speed, the lock 19 is separated, the supercapacitor 18 is discharged, and the outer rotors 15 of the No. 1 motor 3 and No. 2 motor 12 work in the form of electric motors, and drive the vehicle together with the engine 1. The power transmission route As shown in Figure 8; at this moment, the No. 1 motor 3 is reversed.

5. Regenerative braking mode

When the state of charge (SOC) value of the supercapacitor 18 is low and the vehicle speed is higher than a certain value, the vehicle can perform regenerative braking, the lock 19 is separated, the first motor 3 is idling, and the second motor 12 works in the form of a generator , the recovered braking energy is charged into the supercapacitor 18 in the form of electric energy, and the power transmission route is shown in FIG. 9 .

It should be pointed out that when the No. 2 motor 12 is insufficient to provide the required braking torque, the vehicle will adopt a combined braking mode in which regenerative braking, engine anti-drag braking and friction braking act together.

Claims (1)

1. A dual-rotor motor planetary dual-mode hybrid power system is characterized in that: it is composed of engine (1), No. 1 motor (3), No. 2 motor (12), front planetary row, rear planetary row, output gear (16), inverter (17), supercapacitor (18) and interlock (19), described No. two motor (12) is a double-rotor motor, including inner rotor (13), stator (14) and Outer rotor (15); the front planetary row includes the front row sun gear (4), the front row planet carrier (7), the front row planetary gear (5) and the front row ring gear (6); the rear planetary row includes The rear sun gear (11), the rear planet carrier (10), the rear planetary gear (8) and the rear ring gear (9); the front ring gear (6) is shared with the rear ring gear (9) A ring gear base; the engine (1) is connected to the front planet carrier (7) through the input shaft (2); the front sun gear (4) is connected to the No. 1 motor (3), and the lock ( 19) One end is connected to the rotating shaft of the front sun gear (4), and the other end of the locker (19) is fixedly connected to the vehicle frame; the rear sun gear (11) is connected to the inner rotor (13) of the second motor, and the rear row The star frame (10) is fixedly connected to the stator (14) of the No. 2 motor, and the rear ring gear (9) is connected to the outer rotor (15) of the No. 2 motor; the supercapacitor (18) is respectively connected to the No. 1 motor (3) and No. 2 motor (12) are connected; the output gear (16) on the ring gear base outputs power to the drive axle.