For the plateau response, we are familiar with, to high altitudes, many will have a plateau response, motor is not exceptional also, have you ever heard of the plateau of the motor response? What we should take measures to adjust the brushless motor altitude sickness?
一、高原地区的主要特征为
1、空气压力或空气密度小。
2, air temperature is low,, and the temperature change is bigger.
3, absolute humidity is smaller.
4, high solar radiation intensity of illumination.
5000 m in the air oxygen content is only 53% of that in the sea level air oxygen.
ordinary motor running in plateau environment what are the symptoms?
plateau environment of high altitude, low atmospheric pressure, hypoxia, cold and large temperature difference, the sand, condition of ventilation and heat dissipation of the motor, such as insulation and protection for all is extremely harsh test. If general motors directly applied to the plateau environment, likely due to the deterioration of operating conditions fever burned or frequent failures.
2, altitude have any influence on motor?
the altitude of the motor temperature rise, motor corona (High voltage motor)And dc motor reversing have adverse effects.
should be paid attention to the following three aspects:
(1)High altitude, the greater the motor temperature rise, the smaller the output power. But when the temperature decreases with the rise of altitude compensating and the elevation of temperature, the influence of the rated power output of the machine is the same;
(2)High voltage motor in the plateau should be taken when using corona proof measures;
(3)Altitude against dc motor commutator, pay attention to the material selection of carbon brush.
3, plateau motor
plateau motor: refers to the motor use place above the elevation 1000 meters. Refers to: according to the national industry standard JB/T7573 -94 plateau environment under the condition of electric products general technical conditions required plateau motor points again many, they are no more than 2000 meters, 3000 meters, 4000 meters, 5000 meters.
plateau brushless motor running at high altitude, because of the low pressure, cooling condition is poor, and the loss will be increased, lower operation efficiency. Therefore, in the same way, different elevation run of motor electromagnetic load rating and thermal design is different. Not high altitude specifications of the motor, the best appropriate load operation. Otherwise, the performance and life expectancy of the motor will be affected, even destroyed in a short time.
4, plateau on the impact of the motor running
what measures should be taken to
plateau motor running at high altitude, because of the low pressure, cooling condition is poor, and the loss will be increased, lower operation efficiency. Therefore, in the same way, different elevation run of motor electromagnetic load rating and thermal design is different. Not high altitude specifications of the motor, the best appropriate load operation. Otherwise, the performance and life expectancy of the motor will be affected, even destroyed in a short time.
1, the cooling effect is reduced, air medium heat dissipation ability, temperature increase, every 1000 m, rising temperature will increase by 3 -10%, therefore to revised temperature limit.
2, high altitude, the greater the motor temperature rise, the smaller the output power. But when the temperature decreases with the rise of altitude compensating and the elevation of temperature, the influence of brushless motor rated power output can be the same;
3, corona inception voltage is reduced, high voltage motor in the plateau to adopt measures to prevent corona, when using;
4, adverse to the dc motor commutator altitude, pay attention to the material selection of carbon brush.
5, causes the decrease of strength of insulation: every 1000 meters, dielectric strength to cut 8 & ndash; 15%.
6, the clearance of the breakdown voltage to drop, therefore increase by elevation size corresponding to the clearance.
