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What is the relation between torque and gear ratio?
The gear ratio expresses the ratio of the output torque to the input torque. Thus, we can multiply the torque supplied at the motor shaft (the input) by the gear ratio to find the torque at the wheel axle (the output). Transmitting power through a series of gears can also affect rotational speed.
What is torque ratio?
A gear train can be analyzed using the principle of virtual work to show that its torque ratio, which is the ratio of its output torque to its input torque, is equal to the gear ratio, or speed ratio, of the gear train.
What gear ratio is best for speed?
In the real world, typical street machines with aspirations for good dragstrip performance generally run quickest with 4.10:1 gears. Lower gears are required if the car is very heavy, or if the engine makes its power at the upper end of the rpm scale.
How does gear ratio affect speed and torque?
Gear reduction reduces speed and increases torque. High gear ratios (lower numerical rear axle ratios) provide more torque and acceleration, meaning a vehicle’s engine has to run much faster to achieve a given top speed; hence, increased fuel economy.
How is the torque of a DC motor determined?
At the motor, the power is volts * amps. Losses in the geartrain and motor reduce the power available at the output, at best 50% through the motor and another 50% through the worm gear. The ratios between torque, speed, force, current, voltage etc are determined by your gear sizes, gear ratios, motor voltage constants etc.
When do mechanical engineers design devices with gears?
When mechanical engineers design devices with gears, they choose gear sets based on specific design requirements, keeping in mind how different gear ratios affect a system’s performance. After this activity, students should be able to: Describe the relationship between gear ratio, speed and lifting ability. Calculate a gear ratio.
How to calculate gear ratio for lifting load?
Describe the relationship between gear ratio, speed and lifting ability. Calculate a gear ratio. Choose gears for a gear set that optimizes lifting speed for lifting a given load (weight) and test the gear ratio.