CORELESS DC-MOTORS FROM FBelec

1. High power density

Power density is the ratio of output power to weight or volume. The motor with copper plate coil has small volume and good performance. Compared with the traditional coil, the induction coil of copper plate coil is lighter.
No winding wire and grooved silicon steel sheet are needed, eliminating eddy current and hysteresis loss generated by them; The eddy current loss of copper plate coil is small and easy to control, which improves the efficiency of the motor and ensures high output torque and power.

2. High efficiency

The high efficiency of the motor lies in: there is no eddy current and hysteresis loss caused by winding wires and grooved silicon steel sheets in the copper plate coil mode; In addition, the resistance is small, reducing the copper loss (I ^ 2 * R).

3. No torque lag

The copper plate coil mode has no slot silicon steel sheet, no hysteresis loss, and no cogging effect to reduce speed and torque fluctuations.

4. No alveolar effect

The copper plate coil mode has no grooved silicon steel sheet, which eliminates the cogging effect of the interaction between the slot and the magnet. The coil is a structure without an iron core. All steel parts either rotate together (e.g., brushless motor) or are all stationary (e.g., brushless motor). The cogging effect and torque hysteresis phenomenon obviously do not exist.

5. Low starting torque

No hysteresis loss, no cogging effect, low starting torque. During startup, the bearing load is usually the only obstacle. In this way, the starting wind speed of the wind turbine can be very low.

6. No radial force between rotor and stator

Since there is no static silicon steel sheet, there is no radial magnetic force between rotor and stator. This is especially important in critical applications. Because the radial force between rotor and stator will cause rotor instability. Reducing the radial force will improve the stability of the rotor.

7. Smooth speed curve and low noise

Silicon steel sheet without slot reduces the harmonic of torque and voltage. At the same time, there is no AC field in the motor, so there is no noise generated by AC. Only the noise generated by bearing and air flow and vibration caused by non sinusoidal current.

8. High speed brushless coil

At high speed, small inductance is necessary. The small inductance value makes the starting voltage low. By increasing the number of poles and reducing the thickness of the casing, the smaller inductance value helps to reduce the weight of the motor. At the same time, the power density is improved.

9. Fast response brush coil

As the induction value of the brush motor with copper plate coil is low, the response of current to voltage fluctuation is fast. The moment of inertia of the rotor is small, and the response speed of torque and current is equivalent. Therefore, the rotor acceleration is twice that of a conventional motor.

10. High peak torque

The ratio of peak torque to continuous torque is large, because when the current rises to the peak value, the torque constant is constant. The linear relationship between current and torque enables the motor to produce larger peak torque. When the traditional motor reaches saturation, no matter how much current is added, the torque of the motor will not increase.

1. Servo system requiring quick response. For example, the flying direction of the missile can be adjusted rapidly, the servo control of the high magnification optical drive, fast automatic focusing, highly sensitive recording and detection equipment, industrial robots, bionic artificial limbs, etc., and the hollow cup motor can well meet its technical requirements.

2. Products requiring stable and durable driving for driving elements. For example, all kinds of portable instruments and meters, personal personal equipment, field operation instruments and equipment, electric vehicles, etc., the same group of power supply can extend the power supply time more than twice.

3. All kinds of aircraft, including aviation, aerospace, aircraft model, etc. The hollow cup motor has the advantages of light weight, small volume and low energy consumption, which can minimize the weight of the aircraft.

4. All kinds of civil appliances and industrial products. Using hollow cup motor as the actuating element can improve the product grade and performance.

5. Taking advantage of its high energy conversion efficiency, it is also used as a generator; Using its linear operation characteristics, it is also used as a tachogenerator; With reducer, it can also be used as torque motor.