Ki karakteristik ak karakteristik yon sèl faz AC inivèsèl motè?
1.Features nan yon sèl faz AC motè inivèsèl
Avantaj:
1) ka itilize pou tou de AC ak DC;
2) Gwo vitès, jeneralman 400035000 RPM / Min;
3) Règleman vitès pratik (règleman vòltaj ak vitès), ak vitès la pa gen anyen fè ak frekans pouvwa a;
4) koupl la kòmanse gwo, 47 fwa koupl nominal la;
5) Karakteristik mekanik yo mou, ak kapasite Surcharge a fò;
6) Efikasite a se jeneralman 30 pousan 70 pousan;
7) Ti gwosè ak pwa limyè;
Dezavantaj:
bwòs kabòn ak mete commutator, etensèl ranvèse, entèferans elektwomayetik, elatriye.
2.Pou 1 faz AC seri motè, li gen 4 karakteristik anba vòltaj ki estab ak frekans
1)The relationship between current and torque: I=f(T), which is similar to a parabolic characteristic. If don't consider the influence of magnetic circuit saturation, T∝I2;
2)The relationship between current and speed: I=f(n), which is similar to a hyperbolic characteristic. When the power supply voltage is constant and the effect of magnetic circuit saturation is not considered, n∝(1/I);
3) Relasyon ki genyen ant vitès ak koupl: n=f(T). Koub karakteristik sa a se yon karakteristik mou;
4)The relationship between power factor and torque: COS(ф)=f(T), it is a straight line close to the level. The power factor of this type of motor is high, above 0.9, and the high-speed motor can be above 0.95;
In addition, the no-load speed of a single-phase series motor is theoretically infinite, so the no-load speed is very high. Therefore, the mechanical strength of the motor is usually taken into consideration, and no-load operation is not allowed for fear of "speeding." But in fact, due to the friction of the bearing, the pressure and friction of the brush, the wind friction of the armature and the demand for ventilation and heat dissipation, the armature is equipped with fan blades, which is equivalent to adding a small load to the motor, so the actual no-load speed is not It may be infinite. But the no-load speed is still relatively high, generally 1.5 to 3 times the rated speed, or even higher.
