Series regenerative braking torque control systems and methods

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.

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.

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.

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.

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.

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.

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.