DC Brush Motor 180/220V 1.5HP 4500RPM Used For Treadmill Go-Gold

Overview

Product descriptions

Drawings

Samples

There are four types of brushed DC motors.

The first type, is the Permanent Magnet Brush DC Motor. Second, the shunt-wound brushed DC motor. Third is the series-wound DC motor and fourth is the compound-wound brushed DC motor which is a combination of both the shunt and series wound brushed DC motors.

Series-wound brushed DC motors have the field coil in series with the rotor, thus, their field currents become identical. So, the motor current is equal to the sum of the stator ( series ) current and the rotor current. Thus, during normal operation without a load, as the supply voltage is increased the motor current increases. This causes the stator and rotor fields to increase and the motor speed increases with a decrease in torque. But, as a load is placed on the motor, motor current will increase also causing the stator and rotor fields to increase. Now the motor speed will decrease and torque will increase to overcome the load.

As we compare the performance characteristics of all four types of brushed DC motors we see that they all show the same basic characteristic, as speed increases torque decreases. For a permanent magnet brushed DC motor this is a very linear process. With the shunt wound brushed DC motor you can see that there is a high but more consistent torque at low speeds which gives it excellent speed control characteristics. The series wound brushed DC motor graph shows its great low speed torque and a very drastic decrease in torque with higher speed, thus if the load was removed, speed would increase very sharply. Finally, with a compound wound brushed DC motor we see a great combination of both the shunt and series wound brushed DC motors. The graph shows good low speed torque but with a more linear or gradual decrease of torque as speed increases, thus showing that it is well suited for lifting heavy loads with great speed control.