Single-motor driving system of engineering vehicle

Abstract

The utility model provides an engineering vehicle single-motor driving system which comprises a driving motor, a battery pack, a motor controller, an external control end and an encoder, and the driving motor drives an engineering vehicle through a gearbox; the battery pack is connected with the power supply end of the driving motor through the motor controller; the external control end is connected with the motor controller, and the motor controller is connected with the control end of the driving motor through the encoder; the external control end receives the control action of an operator and converts the control action into a control signal; the encoder obtains operation parameters of the driving motor; and the motor controller controls the operation process of the driving motor according to the control signal and the operation parameters of the driving motor. A traditional engine is completely replaced by the single motor, the single motor serves as a kinetic energy output unit, one-to-one replacement in the true sense is achieved, the structure is simple, reliability is high, the improvement cost is low, and the improvement period is short.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric control equipment, and particularly relates to an engineering vehicle single motor driving system. BACKGROUND

[0002] Engineering vehicles such as forklifts, loaders and excavators play an increasingly important role in modern industrial production, and currently domestic engineering vehicles are mainly driven by fuel engines. Figure 1 As shown in the figure, the fuel engine 1 of the traditional fuel engineering vehicle is connected with the gearbox 3 through the shaft coupling 2. The wheel walking mode is that the gearbox 3 drives the main transmission shaft 4, and the main transmission shaft 4 drives the wheel 5 to walk; the traction operation mode is that a hydraulic pump is arranged in the gearbox 3, the gearbox 3 drives the wheel 5 to walk while driving the hydraulic pump to work, and the hydraulic pump drives the hydraulic cylinder of the traction mechanism to work, thereby providing power to the hydraulic cylinder for traction operations such as excavation, pushing, hoisting, etc.

[0003] In response to the call of national energy saving and emission reduction, a large number of fuel engineering vehicles on the market need to be upgraded and modified into electric engineering vehicles, thereby realizing the sustainable development of engineering vehicles.

[0004] The current engineering vehicle oil-to-electricity actively promoted mainly adopts the traditional electric vehicle mode to modify, removes the fuel engine 1 and the gearbox 3 of the engineering vehicle, and then installs two motors, one of which directly drives the wheel 5 to walk through the main transmission shaft 4, and the other of which is directly connected with the hydraulic pump to drive the hydraulic pump to work, thereby providing power to the hydraulic cylinder for traction operations such as excavation, pushing, hoisting, etc.

[0005] This modification method needs to remove many vehicle devices, modify many positions and install many devices, and the two motors lead to a complex control system, high modification cost and long modification period. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide an engineering vehicle single motor driving system to at least solve the problems in the prior art that the engineering vehicle oil-to-electricity needs to remove the fuel engine and the gearbox, install two motors, remove many vehicle devices, modify many positions and install many devices, and the two motors lead to a complex control system, high modification cost and long modification period.

[0007] In order to achieve the above object, the utility model provides an engineering vehicle single motor drive system, include: drive motor, the rotating shaft of drive motor is connected with the gearbox of engineering vehicle to drive engineering vehicle through gearbox, battery group and motor controller, battery group is connected with the power supply end of drive motor through motor controller to supply power to drive motor, external control end and encoder, external control end is connected with motor controller, motor controller is connected with the control end of drive motor through encoder, wherein, external control end is used to receive the control action of operating personnel and is converted into control signal, encoder is used to obtain the running parameter of drive motor, motor controller is used to control the running process of drive motor according to control signal and the running parameter of drive motor.

[0008] Further, the drive motor is a three-phase synchronous or asynchronous motor.

[0009] Further, the motor controller has a first power connection terminal and a second power connection terminal, and the main power supply end of the battery group is connected with the first power connection terminal and the second power connection terminal through a main power supply circuit; wherein, a fuse and a main positive relay are arranged on the main power supply circuit.

[0010] Further, the motor controller has a main positive relay normally open terminal and a main positive relay common terminal, and the battery group has a 12V auxiliary power supply end, which is connected with the main positive relay normally open terminal and the main positive relay common terminal to supply power to the main positive relay; wherein, the main positive relay common terminal and the main positive relay are used to control the on-off of the main positive relay.

[0011] Further, the motor controller has a key signal terminal, a digital power supply +12V terminal, a throttle switch terminal, a seat switch terminal, a hand brake switch terminal, a throttle power supply +5V terminal, a throttle power supply GND terminal and a throttle analog input terminal, and the external control end includes: a key switch, which is connected with the key signal terminal, and the key signal terminal is used to receive the switch signal of the key switch; a throttle switch, a seat switch and a hand brake switch, a first end of the throttle switch, a first end of the seat switch and a first end of the hand brake switch are connected with the digital power supply +12V terminal respectively, a second end of the throttle switch, a second end of the seat switch and a second end of the hand brake switch are connected with the throttle switch terminal, the seat switch terminal and the hand brake switch terminal respectively; the throttle switch terminal, the seat switch terminal and the hand brake switch terminal are used to receive the switch signal of the throttle switch, the seat switch and the hand brake switch respectively; an electronic throttle, which is connected with the throttle power supply +5V terminal, the throttle power supply GND terminal and the throttle analog input terminal respectively, the throttle power supply +5V terminal and the throttle power supply GND terminal are used to supply power to the electronic throttle, and the throttle analog input terminal is used to receive the action signal of the electronic throttle.

[0012] Further, the operation parameters of the driving motor at least include rotor angle, angular velocity and rotating speed, the motor controller has a resolver excitation terminal R+, a resolver excitation terminal R-, a resolver feedback terminal SIN+, a resolver feedback terminal SIN-, a resolver feedback terminal COS+, a resolver feedback terminal COS- and a control power input terminal, the resolver excitation terminal R+, the resolver excitation terminal R-, the resolver feedback terminal SIN+, the resolver feedback terminal SIN-, the resolver feedback terminal COS+, the resolver feedback terminal COS- and the control power input terminal are connected with the encoder to receive the rotor angle, angular velocity and rotating speed signals of the driving motor.

[0013] Further, the operation parameters of the driving motor at least include temperature signal, the motor controller has a motor temperature+ terminal and a motor temperature- terminal, the motor temperature+ terminal and the motor temperature- terminal are connected with the driving motor to receive the temperature signal of the driving motor.

[0014] Further, the motor controller has an RS485_A terminal and an RS485_B terminal, the RS485_A terminal and the RS485_B terminal are connected with a controller diagnostic interface through a CAN bus, the controller diagnostic interface is used for diagnosing the fault of the motor controller.

[0015] Further, the engineering vehicle single motor driving system further comprises a display instrument, the display instrument is connected with the battery pack and the motor controller through the CAN bus, and the display instrument is used for displaying the operation parameters of the driving motor and the working state of the battery pack.

[0016] Further, the battery pack has a 12V auxiliary power supply end, the motor controller has a fan PWM control terminal, and the engineering vehicle single motor driving system further comprises a cooling fan, the 12V auxiliary power supply end is connected with a power receiving end of the cooling fan to supply power to the cooling fan, and the fan PWM control terminal is connected with a control end of the cooling fan to control the cooling fan.

[0017] The utility model discloses an engineering vehicle single motor drive system, including drive motor, battery group, motor controller, external control end and encoder, the rotating shaft of drive motor is connected with the gearbox of engineering vehicle to drive engineering vehicle through gearbox;Battery group is connected with the power supply end of drive motor through motor controller to power supply drive motor;External control end is connected with motor controller, and motor controller is connected with the control end of drive motor through encoder;External control end is used for receiving the control action of operating personnel and will control action convert into control signal;Encoder is used for obtaining the running parameter of drive motor;Motor controller is used for controlling the running process of drive motor according to control signal and the running parameter of drive motor. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the present application and are incorporated herein by reference. The embodiments illustrated in the drawings are provided merely as examples of the present application and therefore should not be considered to limit the present application. In the drawings:

[0019] Figure 1 is a structural schematic diagram of an existing engineering vehicle drive system;

[0020] Figure 2 is a structural block diagram of an engineering vehicle single motor drive system according to an embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of an engineering vehicle single motor drive system according to an embodiment of the present application;

[0022] Figure 4 is a structural schematic diagram of a drive motor of an engineering vehicle single motor drive system according to an embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of a gearbox of an engineering vehicle single motor drive system according to an embodiment of the present application;

[0024] Figure 6This is a circuit connection diagram of an optional single-motor drive system for engineering vehicles according to an embodiment of the present utility model.

[0025] The above figures include the following reference numerals:

[0026] 1. Combustion engine; 2. Coupling; 3. Gearbox; 31. Input shaft; 32. Output shaft; 4. Drive shaft; 5. Wheel; 10. Drive motor; 11. Rotary shaft; 20. Battery pack; 30. Motor controller; 40. External control terminal; 50. Encoder; 60. Display instrument; 70. Cooling fan; 90. Hydraulic pump. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] The single-motor drive system for engineering vehicles according to this utility model embodiment, such as Figure 2 As shown, the system includes a drive motor 10, a battery pack 20, a motor controller 30, an external control terminal 40, and an encoder 50. The shaft 11 of the drive motor 10 is connected to the gearbox 3 of the engineering vehicle to drive the engineering vehicle through the gearbox 3. The battery pack 20 is connected to the power supply terminal of the drive motor 10 through the motor controller 30 to supply power to the drive motor 10. The external control terminal 40 is connected to the motor controller 30, and the motor controller 30 is connected to the control terminal of the drive motor 10 through the encoder 50. The external control terminal 40 is used to receive control actions from the operator and convert the control actions into control signals. The encoder 50 is used to acquire the operating parameters of the drive motor 10. The motor controller 30 is used to control the operation of the drive motor 10 according to the control signals and the operating parameters of the drive motor 10. When modifying engineering vehicles using the single-motor drive system of this utility model, only a single motor is needed to completely replace the fuel engine. The single motor acts as the kinetic energy output unit, without the need to remove the gearbox, hydraulic pump, and subsequent transmission mechanism of the engineering vehicle. This achieves a true one-to-one replacement, with a simple structure, high reliability, and reduced modification costs and time. It solves the problems of existing technologies that require the complete removal of the fuel engine and gearbox and the installation of two motors when converting engineering vehicles from gasoline to electric. This involves removing a lot of vehicle equipment, modifying many locations, and installing a lot of equipment. It also addresses the problems of complex control systems, high modification costs, and long modification cycles caused by two motors.

[0029] like Figure 1 As shown, in existing fuel-powered engineering vehicles, the output shaft of the fuel engine 1 is connected to the gearbox 3 via coupling 2, and the gearbox 3 is then connected to the wheels 5 via drive shaft 4 to drive the wheels 5 to move. Figure 5As shown, the hydraulic pump 90 is arranged near the input shaft 31 of the gearbox 3, and is connected to the input shaft 31 of the gearbox 3 through a gear transmission mechanism. After the power output by the fuel engine 1 is transmitted to the gearbox 3, the power is transmitted to the output shaft 32 through torque conversion, and then the output shaft 32 is connected to the drive shaft 4 of the vehicle to drive the wheels 5 to move through the drive shaft 4. At the same time, the input shaft 31 also transmits part of the power output by the fuel engine 1 to the hydraulic pump 90 to drive the hydraulic pump 90 to operate. When the hydraulic pump 90 works, hydraulic oil is pumped to the hydraulic cylinders of the excavating, pushing, and lifting operation devices to provide power for the excavating, pushing, and lifting operations.

[0030] As shown in Figures 3 to 5 , when the single-motor driving system of the present application is used to modify the traditional fuel engineering vehicle, the fuel engine 1 and the gearbox 3 of the fuel engineering vehicle do not need to be completely removed. Only the fuel engine 1 needs to be removed and replaced with the driving motor 10. The model of the driving motor 10 is selected to match the original gearbox 3, especially the connection structure between the rotating shaft 11 of the driving motor 10 and the input shaft 31 of the gearbox 3. Specifically, the driving motor 10 is a three-phase synchronous or asynchronous motor. As shown in Figure 4 and Figure 5 , after the fuel engine 1 is replaced and installed with the driving motor 10, the rotating shaft 11 of the driving motor 10 is connected to the input shaft 31 of the original gearbox 3 through a spline shaft or a shaft coupling, the output shaft 32 of the gearbox 3 is connected to the main drive shaft 4 of the vehicle, and the wheels 5 are driven to move by the main drive shaft 4. In this embodiment, the driving motor 10 and the gearbox 3 are connected by a spline shaft. Specifically, the end of the rotating shaft 11 of the driving motor 10 is provided with a spline shaft sleeve, and the input shaft 31 of the gearbox 3 is provided with a matching spline shaft. The spline shaft is inserted into the spline shaft sleeve to realize power transmission. After modification, since the gearbox 3 of the vehicle is not changed, the modified traction operation mode is the same as the original traction operation mode, as shown in Figure 5 , the hydraulic pump 90 is arranged near the input shaft 31 of the gearbox 3, and is connected to the input shaft 31 of the gearbox 3 through a gear transmission mechanism. After the power output by the fuel engine 1 is transmitted to the input shaft 31 of the gearbox 3, the input shaft 31 of the gearbox 3 transmits part of the power output by the fuel engine 1 to the hydraulic pump 90 to drive the hydraulic pump 90 to operate. When the hydraulic pump 90 works, hydraulic oil is pumped to the hydraulic cylinders of the excavating, pushing, and lifting operation devices to provide power for the excavating, pushing, and lifting operations.

[0031] Further, as shown in Figure 4As shown, the motor controller 30 has a first power terminal B+ and a second power terminal B-, the main power supply end of the battery pack 20 provides a power supply voltage of 80V to 600V, the positive pole of the main power supply end of the battery pack 20 is connected with the first power terminal B+ through a cable, and the negative pole of the main power supply end of the battery pack 20 is connected with the second power terminal B- through a cable; a fuse and a main positive relay are arranged on the cable between the positive pole of the main power supply end of the battery pack 20 and the first power terminal B+, the fuse is fused under overload condition to protect the battery pack 20, and the main positive relay controls the on-off of the main power supply circuit.

[0032] Further, the motor controller 30 has a main positive relay normally open terminal KM_N.O and a main positive relay common terminal KM_COM, the battery pack 20 further has a 12V auxiliary power supply end, the positive pole of the 12V auxiliary power supply end is connected with the main positive relay normally open terminal KM_N.O, the negative pole of the 12V auxiliary power supply end is connected with the main positive relay common terminal KM_COM, and the coil of the main positive relay is arranged on the circuit between the negative pole of the 12V auxiliary power supply end and the main positive relay common terminal KM_COM; the main positive relay common terminal is connected with the main positive relay common terminal through control of power supply to the coil of the main positive relay to control the on-off of the main positive relay, thereby controlling the power supply of the battery pack 20 to the driving motor 10.

[0033] Further, the motor controller 30 further has a key signal terminal, a digital power supply +12V terminal, a throttle switch terminal, a seat switch terminal, a hand brake switch terminal, a throttle power supply +5V terminal, a throttle power supply GND terminal and a throttle analog input terminal, the external control end 40 includes a key switch, a throttle switch, a seat switch, a hand brake switch and an electronic throttle, one end of the key switch is connected with the key signal terminal, the other end of the key switch is connected with the cable between the positive pole of the main power supply end of the battery pack 20 and the first power terminal B+, and the main power supply end of the battery pack 20 is powered on and the key switch is closed, the key signal terminal receives the switch signal of the key switch, thereby making the battery pack 20 ready for starting the driving motor 10.

[0034] The first end of the throttle switch, the first end of the seat switch and the first end of the hand brake switch are respectively connected with the digital power supply +12V terminal to supply power to the throttle switch, the seat switch and the hand brake switch through the digital power supply +12V terminal, the second end of the throttle switch, the second end of the seat switch and the second end of the hand brake switch are respectively connected with the throttle switch terminal, the seat switch terminal and the hand brake switch terminal, and the throttle switch terminal, the seat switch terminal and the hand brake switch terminal correspondingly receive the switch signals of the throttle switch, the seat switch and the hand brake switch after the throttle switch, the seat switch and the hand brake switch are respectively closed, thereby determining that the throttle switch is opened, there is a driver on the seat and the hand brake has been released, which are necessary conditions for starting the driving motor 10 to work.

[0035] The electronic accelerator is connected with the accelerator power supply +5V terminal, the accelerator power supply GND terminal and the accelerator analog input terminal respectively, the accelerator power supply +5V terminal and the accelerator power supply GND terminal are used to supply power to the electronic accelerator, and the accelerator analog input terminal is used to receive the action signal of the electronic accelerator, so as to linearly control the output current of the driving motor 10 according to the specific action stroke of the electronic accelerator, thereby controlling the rotating speed of the driving motor 10

[0036] In actual operation, the driver first closes the key switch so that the key signal terminal receives the signal that the battery pack 20 is working normally. Then the driver closes the accelerator switch and closes the hand brake switch in turn, so that the accelerator can work normally and the hand brake is released. At the same time, after the driver sits on the seat, the rear seat switch is automatically inducted and closed. After the above conditions are met, the driver can start the driving motor 10 by stepping on the electronic accelerator, and then drive the engineering vehicle to start working.

[0037] The motor controller 30 has an inverter unit to convert the direct current voltage provided by the battery pack 20 into three-phase alternating current voltage to be delivered to the driving motor 10. In actual operation, the operating parameters of the driving motor 10 include at least rotor angle, angular velocity and rotating speed. The motor controller 30 has the resolver excitation terminal R+, the resolver excitation terminal R-, the resolver feedback terminal SIN+, the resolver feedback terminal SIN-, the resolver feedback terminal COS+, the resolver feedback terminal COS- and the control power input terminal connected with the encoder 50 respectively. The encoder 50 can collect the rotor angle, angular velocity and rotating speed information during the operation of the driving motor 10, and convert them into corresponding electrical signals to be sent to the resolver excitation terminal R+, the resolver excitation terminal R-, the resolver feedback terminal SIN+, the resolver feedback terminal SIN-, the resolver feedback terminal COS+ and the resolver feedback terminal COS-. The motor controller 30 controls the operation of the driving motor 10 in real time according to the received signals and the control signals of the electronic accelerator.

[0038] Further, the operating parameters of the driving motor 10 also include temperature signals. Accordingly, the motor controller 30 has a motor temperature + terminal and a motor temperature - terminal connected with the driving motor 10 to receive real-time temperature signals during the operation of the driving motor 10, thereby realizing the monitoring of the working state of the driving motor 10.

[0039] Further, the motor controller 30 has a fan PWM control terminal, the engineering vehicle single motor driving system further comprises a cooling fan 70, a 12V auxiliary power supply end of the battery pack 20 is connected with a power receiving end of the cooling fan 70 to supply power to the cooling fan 70, the fan PWM control terminal is connected with a control end of the cooling fan 70 to control the cooling fan 70, and the cooling fan 70 is used for cooling the motor controller 30 when the working temperature of the motor controller 30 is too high.

[0040] Further, the engineering vehicle single motor driving system further comprises a display instrument 60, the display instrument 60 is connected with the battery pack 20 and the motor controller 30 through a CAN bus, and the CAN protocol meets the stipulation of CAN2.0B. The display instrument 60 is used for displaying the running parameters of the driving motor 10 and the working state of the battery pack 20.

[0041] Further, the motor controller 30 has RS485_A and RS485_B terminals, the RS485_A and RS485_B terminals are connected with a controller diagnostic interface through a CAN bus, and the CAN protocol meets the stipulation of CAN2.0B. Through the controller diagnostic interface, a detection device can be externally connected to diagnose the fault of the motor controller 30.

[0042] When the engineering vehicle single motor driving system is normally started, the battery pack 20 provides voltage to the motor controller 30 through the discharge output of the power supply logic of the BMS, after the key switch is started, the motor controller 30 converts the direct-current voltage into three-phase alternating-current voltage and outputs to the driving motor 10 through inversion, and the driving motor 10 drives the engineering vehicle to run through the gearbox 3.

[0043] If the capacity of the battery pack 20 is low, data interaction is carried out through the CAN bus, the motor controller 30 reduces the torque of the driving motor 10 by controlling the output power, so that the energy consumption of the whole vehicle is reduced, and then the whole vehicle can be ensured to be able to drive to a charging position to charge the battery pack 20. When the power is full, the motor controller 30 returns to normal.

[0044] If the driving motor 10 or other electrical devices appear fault or alarm, the motor controller 30 controls the main positive relay to be disconnected or reduces the output power of the driving motor 10, and simultaneously the motor controller 30 transmits to the battery pack 20 through the CAN bus, so that the protection of the battery pack 20 itself is realized, and damage and accidents caused by short circuit are avoided. The battery pack 20 has an emergency stop switch, in an emergency, the emergency stop switch can be manually pressed down to stop the reaction of the battery pack 20, so that the power supply is cut off.

[0045] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An engineered vehicle single motor drive system characterized by, The utility model relates to an engineering vehicle drive motor control system, comprising: a drive motor (10), the rotating shaft (11) of the drive motor (10) is connected with the gearbox (3) of engineering vehicle to drive the engineering vehicle through the gearbox (3); a battery pack (20) and a motor controller (30), the battery pack (20) is connected with the power supply end of the drive motor (10) through the motor controller (30) to supply power to the drive motor (10); an external control end (40) and an encoder (50), the external control end (40) is connected with the motor controller (30), and the motor controller (30) is connected with the control end of the drive motor (10) through the encoder (50); wherein, the external control end (40) is used to receive the control action of operator and converts the control action into control signal;The encoder (50) is used to obtain the running parameter of the drive motor (10);The motor controller (30) is used to control the running process of the drive motor (10) according to the control signal and the running parameter of the drive motor (10).

2. The engineered vehicle single motor drive system of claim 1, wherein, The drive motor (10) is a three-phase synchronous or asynchronous motor.

3. The engineered vehicle single motor drive system of claim 1, wherein, The motor controller (30) has a first power connection terminal and a second power connection terminal, and the main power supply end of the battery pack (20) is connected with the first power connection terminal and the second power connection terminal through a main power supply circuit; Wherein, the main power supply circuit is provided with a fuse and a main positive relay.

4. The engineered vehicle single motor drive system of claim 3, wherein, The motor controller (30) has a main positive relay normally open terminal and a main positive relay common terminal, and the battery pack (20) has a 12V auxiliary power supply end, which is connected with the main positive relay normally open terminal and the main positive relay common terminal to supply power to the main positive relay; Wherein, the main positive relay common terminal and the main positive relay common terminal are used to control the on-off of the main positive relay.

5. The engineered vehicle single motor drive system of claim 1, wherein, The motor controller (30) has a key signal terminal, a digital power supply +12V terminal, a throttle switch terminal, a seat switch terminal, a hand brake switch terminal, a throttle power supply +5V terminal, a throttle power supply GND terminal and a throttle analog input terminal, and the external control end (40) comprises: A key switch is connected with the key signal terminal, and the key signal terminal is used to receive the switch signal of the key switch; The first end of the throttle switch, the first end of the seat switch and the first end of the hand brake switch are connected with the digital power supply +12V terminal respectively, and the second end of the throttle switch, the second end of the seat switch and the second end of the hand brake switch are connected with the throttle switch terminal, the seat switch terminal and the hand brake switch terminal correspondingly;The throttle switch terminal, the seat switch terminal and the hand brake switch terminal are used to receive the switch signal of the throttle switch, the seat switch and the hand brake switch correspondingly. An electronic accelerator is connected with the accelerator power supply +5V terminal, the accelerator power supply GND terminal and the accelerator analog input terminal respectively, the accelerator power supply +5V terminal and the accelerator power supply GND terminal are used for supplying power to the electronic accelerator, and the accelerator analog input terminal is used for receiving the action signal of the electronic accelerator.

6. The engineered vehicle single motor drive system of claim 1, wherein, The operating parameters of the driving motor (10) at least include rotor angle, angular velocity and rotating speed, the motor controller (30) has a resolver excitation terminal R+, a resolver excitation terminal R-, a resolver feedback terminal SIN+, a resolver feedback terminal SIN-, a resolver feedback terminal COS+, a resolver feedback terminal COS- and a control power input terminal, the resolver excitation terminal R+, the resolver excitation terminal R-, the resolver feedback terminal SIN+, the resolver feedback terminal SIN-, the resolver feedback terminal COS+, the resolver feedback terminal COS- and the control power input terminal are connected with the encoder (50) respectively to receive the rotor angle, angular velocity and rotating speed signals of the driving motor (10).

7. The engineered vehicle single motor drive system of claim 1, wherein, The operating parameters of the driving motor (10) at least include temperature signals, the motor controller (30) has a motor temperature + terminal and a motor temperature - terminal, the motor temperature + terminal and the motor temperature - terminal are connected with the driving motor (10) respectively to receive the temperature signals of the driving motor (10).

8. The engineered vehicle single motor drive system of claim 1, wherein, The motor controller (30) has an RS485_A terminal and an RS485_B terminal, the RS485_A terminal and the RS485_B terminal are connected with a controller diagnostic interface through a CAN bus, and the controller diagnostic interface is used for diagnosing the fault of the motor controller (30).

9. The engineered vehicle single motor drive system of claim 1, wherein, The single-motor driving system of the engineering vehicle further comprises: A display instrument (60) is connected with the battery pack (20) and the motor controller (30) through a CAN bus, and the display instrument (60) is used for displaying the operating parameters of the driving motor (10) and the working state of the battery pack (20).

10. The engineered vehicle single motor drive system of claim 1, wherein, The battery pack (20) has a 12V auxiliary power supply end, the motor controller (30) has a fan PWM control terminal, and the single-motor driving system of the engineering vehicle further comprises: A cooling fan (70) is connected with the power receiving end of the cooling fan (70) through the 12V auxiliary power supply end to supply power to the cooling fan (70), and the fan PWM control terminal is connected with the control end of the cooling fan (70) to control the cooling fan (70).

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