来源：http://www. 发布时间：2019-05-31 浏览：次
1. Frequency conversion motor is more energy-saving
所的家用电器在电机工作中，均发作不同 水平的谐波电压和电流，使电动机在非正弦电压、电流下工作 。高次谐波会惹起电动机定子铜耗、转子铜耗，铁耗及附加损耗的增加，为明显的是团队子铜耗 。由于普通的交流异步电动机是以挨近于基波频率所对应的同步转速旋转的，因 而，高次谐波电压以较大的转差切开转子导条后，便会发作很大的转子损耗 。除此之外，还需求思索因 集肤效应所发作的附加铜耗 。这些损耗都会合适电动机额定发热，功率降落，输出功率减小，但假设运用变频电机，其能耗能减少20%-30%左右 。
The household appliances in the motor work, have different levels of harmonic voltage and current, so that the motor works under non-sinusoidal voltage and current. The higher harmonics will cause the increase of copper loss of stator, rotor, iron loss and additional loss of motor, which is obviously the copper loss of team. Because the common AC asynchronous motor rotates at the synchronous speed corresponding to the fundamental frequency, the high-order harmonic voltage cuts the rotor guide bar with a large slip, which will cause a large rotor loss. In addition, additional copper consumption due to skin effect needs to be considered. These losses will be suitable for motor rated heating, power drop, output power reduction, but assuming the use of frequency conversion motor, its energy consumption can be reduced by about 20% - 30%.
2. The Harmonic Electromagnetic Noise and Jitter of Frequency Converter Motor are Less
普通异步电动机由于电磁、机械、通风等要素所惹起的颤抖和噪声变的愈加复杂 。变频电源中含有的各次时辰谐波与电动机电磁局部的固有空间谐波彼此干与，构成各种电磁激振 力 。当电磁 力波的频率和电动机机体的固有振动频率共同或挨近时，将发作共振现象，然后加大噪声 。由于电动机作业频率规划宽，转速改动规划大，各种电磁 力波的频率很难避开电动机的各构件的固有颤抖频率 。可是变频电机就能够有用处理这些问题 。
The vibration and noise caused by electromagnetic, mechanical, ventilation and other factors of ordinary asynchronous motors become more and more complex. Various time harmonics contained in the variable frequency power supply and the inherent space harmonics of the electromagnetic part of the motor interact with each other, forming various electromagnetic exciting forces. When the frequency of electromagnetic force wave and the inherent vibration frequency of the motor block are close together, the resonance phenomenon will occur, and then the noise will be increased. Due to the wide frequency planning and large speed change planning of the motor, it is difficult to avoid the inherent dithering frequency of various components of the motor. But variable frequency motors can be useful in dealing with these problems.
3. Frequency conversion motor can respond to frequency initiation and braking
变频电机可处理普通异步电动机功率、温升、绝缘强度、噪声与颤抖和冷却，以及频频发起、制动给机械构造和绝缘构造带来疲倦和加快老化等问题，还可有用降落电机在发起是的霎时电压 。变频电机可无极变速无极调速就是从连续到*快速度，或从*快速度到连续，没有档位，是逐渐变快或变慢 。别的全直流变频电机能够经过变频器将电机转速档位分为许多档位来控制电机的转速和理论需求，而交流有刷电机的*多档数只要3档风速调度无法完成变频的效果 。
Frequency conversion motors can deal with the power, temperature rise, insulation strength, noise and shaking and cooling of ordinary asynchronous motors, as well as the weariness and aging of mechanical and insulation structures caused by frequency initiation and braking. They can also be used to drop the instantaneous voltage of the motor when it is starting. Variable-frequency motor can be continuously variable speed stepless speed regulation is from continuous to * fast, or from * fast to continuous, no gear, is gradually faster or slower. Other full direct current frequency converters can divide the motor speed gear into many gears through the converter to control the motor speed and theoretical requirements, while the * multi-gears of AC brush motors can not achieve the effect of frequency conversion as long as three gears of wind speed scheduling.
4. Longer life of AC variable frequency motor
When the motor works, the carrier frequency is about thousands to tens of kilohertz, which makes the stator winding of the motor accept a high voltage rise rate, which is equivalent to the impact voltage applied by the motor with a large steepness, so that the inter-turn insulation of the motor can be tested more severely, while the frequency conversion motor can operate under the voltage filtered by rectifier, and its performance can be more stable, and its life is longer. 。
5. Variable-frequency motor with infinitely variable speed
Poleless speed regulation is from continuous to * fast speed, or from * fast to continuous, no gear, is gradually becoming faster or slower, other full DC frequency conversion motor can be divided into many gears through the frequency converter to control the motor speed and theoretical requirements, and AC brush motor * multi-gears as long as three-speed wind speed scheduling can not complete the effect of frequency conversion.
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