Series regenerative braking torque control systems and methods
First Claim
1. A regenerative braking system for use in an electric vehicle, the regenerative braking system comprising:
- an electric motor system operable to generate torque to drive and control the electric vehicle;
a traction controller coupled to receive a vehicle speed input from a vehicle speed sensor and operable to control the electric motor system and to produce a percentage multiplier based on the vehicle speed input;
a brake system operable to generate torque to drive and control the electric vehicle; and
a brake controller coupled to receive the percentage multiplier from the traction controller and operable to control the brake system.
9 Assignments
0 Petitions
Accused Products
Abstract
Regenerative braking systems and methods for use in an electric vehicle, such as a battery-powered vehicle, a fuel cell vehicle, and a hybrid electric vehicle, including an electric motor system operable for generating torque to drive and control the electric vehicle, a traction controller operable for controlling the electric motor system, a brake system operable for generating torque to drive and control the electric vehicle, and a brake controller operable for controlling the brake system. Traction functions are strictly allocated to the traction controller, braking functions are strictly allocated to the brake controller, and the brake controller is subordinated to the traction controller. The regenerative braking systems and methods also including a communications system operable for transferring information between the traction controller and the brake controller.
-
Citations
35 Claims
-
1. A regenerative braking system for use in an electric vehicle, the regenerative braking system comprising:
-
an electric motor system operable to generate torque to drive and control the electric vehicle;
a traction controller coupled to receive a vehicle speed input from a vehicle speed sensor and operable to control the electric motor system and to produce a percentage multiplier based on the vehicle speed input;
a brake system operable to generate torque to drive and control the electric vehicle; and
a brake controller coupled to receive the percentage multiplier from the traction controller and operable to control the brake system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A regenerative braking system for use in an electric vehicle, the regenerative braking system comprising:
-
an electric motor system operable to generate torque to drive and control the electric vehicle;
a traction controller operable to control the electric motor system wherein the traction controller comprises;
a percentage multiplier module disposed within the traction controller wherein the percentage multiplier module is operable to generate a percentage multiplier utilizing a piecewise-linear transfer function;
a brake system operable to generate torque to drive and control the electric vehicle; and
a brake controller operable to control the brake system. - View Dependent Claims (16)
-
-
17. A regenerative braking system for use in an electric vehicle, the regenerative braking system comprising:
-
an electric motor system operable to generate torque to drive and control the electric vehicle;
a traction controller operable to control the electric motor system wherein the traction controller comprises;
a percentage multiplier module disposed within the traction controller wherein the percentage multiplier module is operable to generate a percentage multiplier utilizing a piecewise-linear transfer function and wherein the piecewise-linear transfer function is approximately 0% below a predetermined maximum creep speed limit;
a brake system operable to generate torque to drive and control the electric vehicle; and
a brake controller operable to control the brake system.
-
-
18. A regenerative braking system for use in an electric vehicle, the regenerative braking system comprising:
-
an electric motor system operable to generate torque to drive and control the electric vehicle;
a traction controller operable to control the electric motor system wherein the traction controller comprises;
a percentage multiplier module disposed within the traction controller wherein the percentage multiplier module is operable to generate a percentage multiplier utilizing a piecewise-linear transfer function and wherein the piecewise-linear transfer function is 100% above double a predetermined maximum creep speed limit;
a brake system operable to generate torque to drive and control the electric vehicle; and
a brake controller operable to control the brake system.
-
-
19. A regenerative braking method for use in an electric vehicle, the regenerative braking method comprising:
-
receiving a vehicle speed input at a traction controller from a vehicle speed sensor;
producing a percentage multiplier at the traction controller based on the vehicle speed input;
controlling an electric motor system by the traction controller to drive and control the electric vehicle;
providing a brake system operable for generating torque to drive and control the electric vehicle;
receiving the percentage multiplier at a brake controller from the traction controller; and
controlling a brake system by the brake controller to drive and control the electric vehicle. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
-
33. A regenerative braking method for use in an electric vehicle the regenerative braking method, comprising:
-
providing an electric motor system operable for generating torque to drive and control the electric vehicle, providing a traction controller operable for controlling the electric motor system, generating a percentage multiplier utilizing a percentage multiplier module disposed within the traction controller wherein generating the percentage multiplier comprises;
utilizing a piecewise-linear transfer functions;
providing a brake system operable for generating torque to drive and control the electric vehicle; and
providing a brake controller operable for controlling the brake system.
-
-
34. A regenerative braking method for use in an electric vehicle the regenerative braking method comprising:
-
providing an electric motor system operable for generating torque to drive and control the electric vehicle;
providing a traction controller operable for controlling the electric motor system, generating a percentage multiplier utilizing a percentage multiplier module disposed within the traction controller wherein generating the percentage multiplier comprises;
utilizing a piecewise-linear transfer function wherein the piecewise-linear transfer function is approximately 0% below a predetermined maximum creep speed limit, providing a brake system operable for generating torque to drive and control the electric vehicle; and
providing a brake controller operable for controlling the brake system.
-
-
35. A regenerative braking method for use in an electric vehicle, the regenerative braking method comprising:
-
providing an electric motor system operable for generating torque to drive and control the electric vehicle;
providing a traction controller operable for controlling the electric motor system;
generating a percentage multiplier utilizing a percentage multiplier module disposed within the traction controller wherein generating the percentage multiplier comprises;
utilizing a piecewise-linear transfer function wherein the piecewise-linear transfer function is 100% above double a predetermined maximum creep speed limit;
providing a brake system operable for generating torque to drive and control the electric vehicle; and
providing a brake controller operable for controlling the brake system.
-
Specification