Is There a Way to Calculate Gear Ratio Based on Torque and Outside Forces?

Click For Summary
SUMMARY

This discussion focuses on calculating gear ratios in electric drivetrains using SIMULINK, specifically for a continuously variable transmission (CVT). The user seeks to understand how to determine the gear ratio based on output torque, current, and angular velocity. Key insights include the relationship between output torque and gear ratio, as well as the need to account for external forces acting on the motor. The purpose of the CVT is clarified as maintaining constant output speed despite varying loads, suggesting the use of control loops for real-time adjustments.

PREREQUISITES
  • Understanding of SIMULINK for modeling electric drivetrains
  • Knowledge of torque calculations in electric motors
  • Familiarity with continuously variable transmission (CVT) principles
  • Basic concepts of control loops and feedback systems
NEXT STEPS
  • Research "System Dynamics" by Palm for equations related to motor dynamics
  • Explore methods for calculating external forces acting on electric motors
  • Learn about control loop design for real-time gear ratio adjustments
  • Investigate advanced SIMULINK techniques for drivetrain modeling
USEFUL FOR

Engineers and developers working on electric drivetrain systems, automotive engineers focusing on transmission design, and anyone involved in modeling control systems in SIMULINK.

Blues_MTA
Messages
18
Reaction score
0
Im working on a model in SIMULINK of an electric drivetrain with an automatic transmission.. The overall goal is to develop an algorithm controlling controlling a CVT via factors such as current, angular velocity, etc. This may seem very basic to most of you, but i know that Output torque = torque Produced by engine X Gear Ratio . How would one go about finding the gear ratio, is there anyway to find the amount of torque required for a given situation based on things like current and angular velocity?

I know how to calculate the torque produced by the motor, but is there anyway to calculate the outside forces acting on the motor in order to determine the gear ratio.
 
Engineering news on Phys.org
I'm a bit confused. What's the purpose of the CVT? To keep the output speed constant, regardless of changes in load? In that case, can you use a control loop to measure the output speed and adjust the gear ratio and motor control?

How is "outside forces acting on the motor" different from "torque produced by the motor"?
 

Similar threads

Calculating Required Torque for 12V DC Motor
  • · Replies 17 ·
Replies
17
Views
4K
How do I select the right motor and gear ratio for a mid-drive e-Bike?
  • · Replies 2 ·
Replies
2
Views
4K
Calculating gear ratio from the motor's graph for an EV?
  • · Replies 3 ·
Replies
3
Views
4K
Calculating the force of an average car
  • · Replies 18 ·
Replies
18
Views
7K
Gear Ratios and Constant Power/Torque: find max velocity?
  • · Replies 3 ·
Replies
3
Views
4K
Robotics DC Motor Help: Testing Motors for Project
  • · Replies 1 ·
Replies
1
Views
2K
Calculate the gear ratio for every gear
  • · Replies 4 ·
Replies
4
Views
2K
Two DC-motors acting against eachother
  • · Replies 6 ·
Replies
6
Views
4K
Undergrad Increasing the output torque of a DC motor with gears
  • · Replies 16 ·
Replies
16
Views
4K
Torque calculations: Rotating vertical shaft
  • · Replies 5 ·
Replies
5
Views
5K