Use of motor magnets
Time:09/30/2015
Magnetic tile mainly used in permanent magnet DC motor with electromagnetic motors have different magnetic potential source through the excitation coil, permanent magnet motor is a permanent magnet material to produce a constant magnetic potential sources. Tile instead of permanent magnet excitation power has many advantages, make simple motor structure, easy maintenance, light weight, small size, reliable, use less copper, low copper consumption, energy consumption and small.
Influence of magnetic-watt motor performance
(1) a high residual magnetic flux density Br. Because the same magnetic poles at the air gap surface area, Br high to produce a large output torque and high power. The motor will have high efficiency.
(2) high Hcb. Because Hcb high, in order to ensure the required motor output electromotive force, the motor operating point close to the maximum energy product, the ability to take full advantage of the magnet.
(3) high Hcj. Hcj high can ensure that the motor has a strong resistance to demagnetization overload and anti-aging, anti-low temperature.
(4) a high (BH) max. (BH) max higher scores indicating better permanent ferrite in the motor duty factor actually running.
(5) magnetic energy Φ better, which will greatly improve the efficiency of the motor.
Squareness (6) of the demagnetization curve, the better, the smaller the dynamic losses of the motor.
(7) Ferrite higher resistivity, the smaller the eddy current losses.
(8) permanent ferrite temperature coefficient is small, at high temperatures it has a good temperature stability
(9) starting current, small time constant. The impact of supply was low.
