**Contents**show

## How is torque calculated in BLDC motors?

**Brushless motor calculation**

- Imax= sqrt(V Io/Rm) Torque at max efficiency: …
- Ip= (V + Rm Io)/(2 Rm) Torque at max power output. …
- MOTOR MAXIMUM EFFICIENCY: (Better mechanical output to electrical work ratio) η max= [1- Sqrt ( Io Rm / V )²] …
- USING THIS EQUATIONS:

## What is torque in BLDC motor?

By controlling currents in the three windings, a magnetic field of arbitrary direction and magnitude can be produced by the stator. Torque is then produced by **the attraction or repulsion between this net stator field and the magnetic field of the rotor**.

## How much torque is required to move a car?

Overall transmission (and power-train) efficiency of the modern electric vehicles is within 59 .. 62 %. The answer to your question is **43.2 Nm** of Torque required that can be obtained with the transmission ratio value of 15.

## How much torque does a 1 hp motor have?

The 3600 RPM, 1HP motor produces **1.5 ft.** **lbs.** of torque at 3600 RPM. So if your 1HP pump was operating at 1800 RPM, the 1800 RPM motor would be producing 3 ft.

## What are the disadvantages of BLDC motor?

**Disadvantages of brushless DC motors:**

- Cost: Rare-earth permanent magnets are much more expensive than other permanent magnets, which leads to an increase in motor costs.
- Limited constant power range: A large constant power range is critical to achieving high vehicle efficiency.

## What is maximum speed of BLDC motor?

Brushless DC Motor (BLDC Motor) & Gear Motor Lineup

Output Power | Gear Options | Speed Range |
---|---|---|

400 W (1/2 HP) Brushless DC Motors & Gear Motors | Parallel Shaft (Stainless Steel Shaft)* | 80 ~ 4000 r/min Min: 0.19 [600:1] Max: 800 [5:1] |

Right-Angle Hollow Shaft (Stainless Steel)* | ||

Hollow Shaft Flat Gear | ||

Round Shaft (no Gear) |

## What is 1 Nm of torque?

Torque is measured in Newton metres (Nm) or you might see the imperial measurement of lb-ft (pounds-feet). If you want to calculate the conversion for yourself, 1 Nm is equivalent to **0.738 lb/ft**.

## What is the formula for net torque?

The net torque is therefore **τnet=∑i|τi|**=160−60+120+10=230N⋅m.