Four motor direct driving system
A driving system for electric vehicles. The driving system may have two or more electric motors, each with voltage inputs, which are connected to the axles and tires of the vehicle. A variable input control may provide a signal that indicates its current operation position to a vehicle control unit. The vehicle control unit takes the information from the variable input control and determines how much power to send to each of the electric motors' voltage inputs.
1. A vehicle driving system comprising:
a steering wheel with a corresponding steering angle;
four electric motors, wherein each of the four electric motors has a voltage input;
a variable input control configured to provide a signal indicating an operational position of the variable input control, wherein the operational position of the variable input control is related to the steering angle;
four wheels, each of the four wheels connected to one of the four electric motors by an axle; and
a vehicle control unit configured to control the voltage inputs of the four electric motors, wherein the vehicle control unit is further configured to:
receive information indicating the operational position of the variable input control;
determine the voltage inputs for the four electric motors based on the received information such that, when the electric vehicle is turning:
a first voltage input is determined for a first electric motor coupled with a front inside turning wheel;
a second voltage input is determined for a second electric motor coupled with a front outside turning wheel;
a third voltage input is determined for a third electric motor coupled with a rear inside turning wheel;
a fourth voltage input is determined for a fourth electric motor coupled with a rear outside turning wheel;
wherein each of the first voltage input, the second voltage input, the third voltage input, and the fourth voltage input are different from each other; and
wherein the first voltage input is less than the second voltage input, the third voltage input is less than the fourth voltage input, the third voltage input is less than the first voltage input, and the fourth voltage input is less than the second voltage input; and
generate instructions to effectuate the voltage inputs to the four electric motors.
2. The system of claim 1 , further comprising:
four electric power inverting devices that invert voltage, wherein each of the four electric power inverting devices are configured to receive an input from the vehicle control unit and output a voltage to one of the four electric motors.
3. The system of claim 2 , further comprising:
four encoders, wherein each of the four encoders are configured to record a mechanical output from one of the four electric motors.
4. The system of claim 3 , wherein each of the four encoders contain an output that feeds back to the vehicle control unit.
5. The system of claim 1 , further comprising:
an accelerator pedal with a corresponding accelerator pedal position; and
a brake pedal with a corresponding brake pedal position.
6. The system of claim 5 , wherein the operational position of the variable input control is related to the accelerator pedal position and the brake pedal position.
7. The system of claim 6 , wherein the vehicle control unit is configured to control the voltage inputs of the four electric motors based on signals received from the accelerator pedal, the brake pedal, the steering wheel, and the four encoders.
8. The system of claim 6 , wherein the mechanical output recorded by the four encoders from the four electric motors is the rotational speed of each motor.
9. The system of claim 6 , wherein the mechanical output recorded by the four encoders from the four electric motors is the tangential speed of each wheel.
10. The system of claim 1 , wherein each of the four wheels are connected to one of the four electric motors without the use of transmission gears.
11. The system of claim 1 , wherein each of the four electric motors are separate and distinct from each of the four wheels.
12. A vehicle driving system for an electric vehicle, the vehicle driving system comprising:
an accelerator pedal;
a brake pedal;
a steering wheel;
four electric motors, wherein each of the four electric motors has a voltage input;
a variable input control configured to provide a signal indicating an operational position of the variable input control, wherein the operational position of the variable input control is related to the accelerator pedal position, the brake pedal position, and the steering angle;
four wheels, wherein each of the four wheels are connected to one of the four electric motors by an axle;
a vehicle control unit configured to control the voltage inputs of the four electric motors, wherein the vehicle control unit is further configured to:
receive information indicating the operational position of the variable input control;
determine the voltage inputs for the four electric motors based on the received information such that, when the electric vehicle is turning:
a first voltage input is determined for a first electric motor coupled with a front inside turning wheel;
a second voltage input is determined for a second electric motor coupled with a front outside turning wheel;
a third voltage input is determined for a third electric motor coupled with a rear inside turning wheel;
a fourth voltage input is determined for a fourth electric motor coupled with a rear outside turning wheel;
wherein each of the first voltage input, the second voltage input, the third voltage input, and the fourth voltage input are different from each other; and
wherein the first voltage input is less than the second voltage input, the third voltage input is less than the fourth voltage input, the third voltage intput is less than the first voltage intput, and the fourth voltage input is less than the second voltage input; and
generate instructions to effectuate the voltage inputs to the four electric motors;
four electric power inverting devices that invert voltage, wherein each of the four electric power inverting devices are configured to receive an input from the vehicle control unit and output a voltage to one of the four electric motors;
four encoders, wherein each of the four encoders are configured to record a mechanical output from one of the four electric motors;
wherein the vehicle control unit is configured to control the voltage inputs of the four electric motors based on signals received from the accelerator pedal, the brake pedal, the steering wheel, and the four encoders;
wherein the mechanical output recorded by the four encoders from the four electric motors is the rotational speed of each motor; and
wherein each of the four electric motors are separate and distinct from each of the four wheels.
13. A method for driving an electric vehicle, the method comprising:
receiving a signal at a vehicle control unit from a variable input control, wherein the signal from the variable input control corresponds to an operational position of the variable input control, and wherein the operational position of the variable input control is related to a steering angle corresponding to a steering wheel;
determining four voltage outputs at the vehicle control unit based on the information received from the variable input control such that, when the electric vehicle is turning:
a first voltage output is determined for coupling with a first electric motor connected to a front inside turning wheel;
a second voltage output is determined for coupling with a second electric motor connected to a front outside turning wheel;
a third voltage output is determined for coupling with a third electric motor connected to a rear inside turning wheel;
a fourth voltage output is determined for coupling with a fourth electric motor connected to a rear outside turning wheel;
wherein each of the first voltage output, the second voltage output, the third voltage output, and the fourth voltage output are different from each other; and
wherein the first voltage output is less than the second voltage output, the third voltage output is less than the fourth voltage output, the third voltage output is less than the first voltage output, and the fourth voltage output is less than the second voltage output; and
outputting the first voltage output, the second voltage output, the third voltage output, and the fourth voltage output at the vehicle control unit.
14. The method of claim 13 , further comprising:
passing the first voltage output through a first electric power inverting device; and
passing the second voltage output through a second electric power inverting device;
passing the third voltage output through a third electric power inverting device; and
passing the fourth voltage output through a fourth electric power inverting device.
15. The method of claim 14 , further comprising:
receiving a first signal at the vehicle control unit from a first encoder;
receiving a second signal at the vehicle control unit from a second encoder;
receiving a third signal at the vehicle control unit from a third encoder;
receiving a fourth signal at the vehicle control unit from a fourth encoder; and
wherein the signals from the first, second, third, and fourth encoders correspond to mechanical outputs from the first, second, third, and fourth electric motors, respectively.
16. The method of claim 15 , wherein the determining of the first, second, third, and fourth voltage outputs at the vehicle control unit is based on the information received from the variable input control and the information received from the first, second, third, and fourth encoder.