Comparison

a. Loss comparison between AC induction motor and DC brushless motor ( Magnet motor ).

b. Loss comparison between carbon brush DC motor and brushless DC motor.

2. BIG HORSEPOWER & COMPACT CONSTRUCTIION

The DC brushless motor employs permanent magnet type rotor, which does not flow through the magnetic field created by current. Less heat generation in the motor means reduced energy waste and high efficiency. The heat generation on a DC brushless motor is only half comparing to that on an induction motor. Under the same horsepower condition, the DC motor requires less heat dissipation surface, which allows for a smaller volume. This also means under the conditions of same heat generation, same volume and same surface area, the frame number and horsepower can be increased. The volume for a motor with same horsepower output is reduced by 10 ~ 28%.

3. EXTREMELY LINEAR CURRENT & VS TORQUE CURVE

The output torque of a DC brushless motor is constantly proportional to current of motor, and features extremely linear ratio. It provides more accurate torque control ( Current control ) than that of a conventional DC motor with carbon brush. The DC brushless motor is ideal for tension control for center rewinding, unwind take-up and rewinding. It upgrades tension control accuracy and inereases winding diameter ratio up to over 1:12.

4. HIGH CONTINUOUS TORQUE OUTPUT & AT LOW SPEED RANGE

The DC brushless motor features high torque output at low speed and extra speed. it is exellent for the machines requiring continuous low speed running overcoming static friction of heavy load and overcoming high inertia mass. Other features included are sufficient torque at zero speed, long retaining time at zero speed, frequent starting, fast acceleration/deceleration, fast starting and no overload tripping. Applicable equipment include: Conveying system, hoist traveling and lifting, man and goods elevator, punch press, bending machine, shearing machine, injection molding machine, rewinding and take-off machine, etc. Under the condition of maximum magnetic flux, "AT" is same. The higher EMC, the more coils, but the less ampere.
EMC = Reverse potential
EMC = Ke value