The basic principle of permanent magnet brushless DC deceleration motor

The concept of permanent magnet brushless DC reduction motor reduction ratio refers to the gear transmission ratio of the reduction device, which refers to the ratio of instantaneous input speed to injury rate in the reduction mechanism, indicated by the symbol "i". If the input speed is 1500 revolutions per minute and the output speed is 25 revolutions per minute, the reduction ratio is: i=60:1. The reduction ratio of a general reduction mechanism is marked according to the actual reduction ratio, but some special reducers such as rotary wire reducers or harmonic current reducers sometimes use rounding to calculate the whole number, without using true fractions. For example, the specific reduction ratio can be 28.13, while when labeled, it is generally labeled as 28.

Calculation Method for Reduction Ratio of Permanent Magnet DC Brushless Reduction Motor

1. Define the calculation method: reduction ratio=input speed/output speed.

2. General calculation method: Reduction ratio=applied torque * speed ratio/(9550 * motor power * performance index).

3. Calculation method for gear system: Reduction ratio=modulus of the rotating shaft gear/modulus of the driven gear (in multi-stage gear reduction, the modulus of the driven gear of all meshing gears should be multiplied by the modulus of the rotating shaft gear).

4. Calculation method for reduction ratio of the transmission belt, transmission chain, and friction wheel: reduction ratio=driven gear aperture/rotating shaft aperture.

The output torque of a permanent magnet brushless DC reduction motor is related to the motor speed and output power.

1. Formula calculation: T=9550P/n, which is commonly used in projects to calculate torque and output power; Calculate the formula for calculating the relationship between speed ratios. Among them: t-torque. 9550- constant; Motor power (kW); Attention to export speed: It should be noted that permanent magnet DC brushless reduction motors generally calculate torque through reducers, and attention should be paid to the high efficiency and loss factors of worm gear and worm gear transmission.

2. Calculation formula for torque motor of permanent magnet brushless DC reduction motor servo motor: T=F * R * reduction ratio. For example, pushing a 100-pound object with R=50mm and a reduction ratio of 1:50, searching for the torque of the servo motor? Response: 100x9.8 (gravity acceleration) x0.05x0.02=1.98Nm

Calculation method for the torque of servo motor reducer in permanent magnet brushless DC reduction motor

1. Transmission ratio output speed/reducer output speed ("transmission ratio" also known as "gear transmission ratio").

2. Master the motor power, transmission ratio, and performance index, and find the formula for calculating the torque of the reducer as follows: reducer torque=9550 x motor power x reduction ratio x performance index/speed ratio.

3. Master the torque, derived speed, and performance index of the reducer, and find the following formula to calculate the required motor power for the reducer: motor power=torque x speed ratio/9550x reduction ratio x performance index.