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Brush OD32series
start-motors
038
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The advantages and disadvantages of brushless motors
Advantages:
1. Simple structure
The brushless motor has a simple structure, is easy to manufacture and process, is convenient for maintenance, and is easy to control; the DC motor also has the characteristics of fast response, large starting torque, and the ability to provide the rated torque from zero speed to the rated speed.
2. Smooth operation, with excellent starting and braking performance
Brushed motors operate by voltage regulation for speed control, so they have smooth starting and braking, and also smooth operation at constant speed. Brushless motors usually have digital frequency conversion control. They first convert AC to DC, and then DC to AC. The speed is controlled by frequency changes. Therefore, brushless motors do not operate smoothly during starting and braking, with large vibrations. Only when the speed is constant will they operate smoothly.
3. High control accuracy
Brushless motors are usually used together with reducers and encoders, which enables the motor to have greater output power and higher control accuracy. The control accuracy can reach 0.01 millimeters, allowing the moving parts to stop at any desired position. All precision machine tools are controlled by DC motors for their high accuracy.
Disadvantages:
1. There is friction between the brush and the commutator, which leads to reduced efficiency, increased noise, and easy overheating. The lifespan of brush motors is several times shorter than that of brushless motors.
2. Maintenance is troublesome as the brush needs to be replaced constantly.
3. Due to its high resistance, the efficiency is low and the output power is small.
4. The friction between the brush and the commutator can generate sparks, which causes significant interference.
The advantages and disadvantages of brushless motors
Advantages:
1. Simple structure
The brushless motor has a simple structure, is easy to manufacture and process, is convenient for maintenance, and is easy to control; the DC motor also has the characteristics of fast response, large starting torque, and the ability to provide the rated torque from zero speed to the rated speed.
2. Smooth operation, with excellent starting and braking performance
Brushed motors operate by voltage regulation for speed control, so they have smooth starting and braking, and also smooth operation at constant speed. Brushless motors usually have digital frequency conversion control. They first convert AC to DC, and then DC to AC. The speed is controlled by frequency changes. Therefore, brushless motors do not operate smoothly during starting and braking, with large vibrations. Only when the speed is constant will they operate smoothly.
3. High control accuracy
Brushless motors are usually used together with reducers and encoders, which enables the motor to have greater output power and higher control accuracy. The control accuracy can reach 0.01 millimeters, allowing the moving parts to stop at any desired position. All precision machine tools are controlled by DC motors for their high accuracy.
Disadvantages:
1. There is friction between the brush and the commutator, which leads to reduced efficiency, increased noise, and easy overheating. The lifespan of brush motors is several times shorter than that of brushless motors.
2. Maintenance is troublesome as the brush needs to be replaced constantly.
3. Due to its high resistance, the efficiency is low and the output power is small.
4. The friction between the brush and the commutator can generate sparks, which causes significant interference.
