How do you calculate torque of a planetary gearbox?

How do you calculate torque of a planetary gearbox?

ANALYTICAL CALCULATIONS Input torque = (60*voltage*current)/ (2*22/7*input speed) 2. Output torque = (60*voltage*current)/ (2*22/7*output speed) 3. Holding torque = Output torque – Input torque.

How is a 1 1 ratio achieved using a planetary gear set?

If both sun gears turn in the same direction, the planet gears lockup because they can only spin in opposite directions. This locks the ring gear to the planets and causes everything to spin as a unit, producing a 1:1 ratio.

How do planetary gears increase torque?

The planet gears are mounted on a joint carrier that is connected to the output shaft. The rotational speed of the output is lower than that of the drive, and the torque of the output is higher in reverse proportion. The more gear wheels mesh with each other, the higher the torque.

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What is gearbox torque?

A gear’s transmission torque changes as it increases or decreases speed. Generally, by reducing the speed, a small torque at the input side is transmitted as a larger torque at the output side. The calculation of torque depends on the number of teeth.

Why are there planetary gears?

Planetary gears are often used when space and weight are an issue, but a large amount of speed reduction and torque are needed. This requirement applies to a variety of industries, including tractors and construction equipment where a large amount of torque is needed to drive the wheels.

How are planetary gear ratios calculated?

To make calculating planetary gear ratios as simple as possible, note the number of teeth on the sun and ring gears. Calculate gear ratio by dividing the number of teeth on the driven gear by the number of teeth on the driving gear.

Do gears increase torque?

The associated torque is quantified by multiplying the circumferential component by the radius; larger gears experience a greater amount of torque, whereas smaller gears experience less torque. Similarly, the torque ratio is equal to the ratio of the gears’ radii.

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What happens to speed when you increase torque?

For a constant power speed decreases when torque increases. If you want to maintain the same speed (rpm) even on a up-hill, you need expend more power/fuel, in this case torque increases to maintain the same speed.