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How to save energy for high efficiency motor?

Views: 286     Author: Site Editor     Publish Time: 2022-06-24      Origin: Site

高效电机是指其效率应满足相应能效要求的高效率电机。高效电机将新的制造工艺和新材料完美地集成到核心部件中。电机线圈的优化设计可以有效地降低电磁能、热能和机械能的损耗,提高运行效率。电机发热少,使用寿命长。


电机效率为什么不能达到100%?


从下面图看电机功率传递如下:

high effiency motor

• 输入功率P1

• 定子铁损△ PFe1

• 定子铜损△ PCu1

• 转子铜损△ PCu2

• 机械损耗△ Po

• 输出功率P2

• 电机效率


high effiency motor 2

• 铁损包括磁滞损失与涡流损失

• 铜损是指定、转子的直流电阻造成的损耗

超高效电机在每个能量损失环节进行改进:


1.优化设计减少机械损耗△P o

• 高质量球轴承 , 减少摩擦和振动

• 锁紧的轴承减少端间隙

• 风扇和风扇罩设计为适宜的冷却和更安静的运行

• 更小的风扇产生更小的损耗

• 更低的电机运行温度使得更小的风扇可以使用


2.优化设计减少了定子铜损△P Cu1

• 更多的绕线

• 改进的槽的设计

• ISR (Inverter Spike Resistant) 磁线提供高至100倍的电压峰值抵抗力

• 电机定子两端都有端部绑带

• 低的温升 (< 80°C)

• F 级绝缘系统

• 在允许最高温度上限下,运行温度每低 10°C 可使绝缘寿命加倍


3.优化设计减少了转子铜损△P Cu2 和机械损耗

• 改进转子绝缘

• 高压冲模铸铝转子

• 转子动平衡


4.设计减少了铁损△P Fe1

• 更薄的矽钢叠片

• 改进钢的特性以达到更低的损耗并且提供同样的性能

• 优化的气隙


A high-efficiency motor refers to a high-efficiency motor whose efficiency should meet the corresponding energy efficiency requirements. High-efficiency motors integrate new manufacturing processes and new materials perfectly into the core components. The optimized design of the motor coil can effectively reduce the loss of electromagnetic energy, thermal energy and mechanical energy, and improve the operation efficiency. The motor generates less heat and has a long service life.


Why can't the motor efficiency reach 100%?


From the figure below, the power transfer of the motor is as follows:

high effiency motor

• Input power P1

• Stator iron loss △ PFe1

• Stator copper loss △ PCu1

• Rotor copper loss △ PCu2

• Mechanical loss △ Po

• Output power P2

• Motor efficiency


high effiency motor 2

• Iron loss includes hysteresis loss and eddy current loss

• Copper losses are losses due to the specified, DC resistance of the rotor

Ultra-efficient motors improve at every energy loss:


1. Optimized design to reduce mechanical loss △P o


• High quality ball bearings to reduce friction and vibration

• Locked bearings reduce end play

• Fan and fan guard designed for proper cooling and quieter operation

• Smaller fans produce less losses

• Lower motor operating temperature allows smaller fans to be used


2. Optimized design reduces stator copper loss △P Cu1


• more winding

• Improved slot design

• ISR (Inverter Spike Resistant) magnet wire provides up to 100 times higher voltage spike resistance

• End straps on both ends of the motor stator

• Low temperature rise (< 80°C)

• Class F insulation system

• Double insulation life for every 10°C lower operating temperature at the upper limit of the maximum allowable temperature


3. Optimized design reduces rotor copper loss △P Cu2 and mechanical loss

• Improved rotor insulation

• High pressure die cast aluminium rotor

• Rotor balance


4. Design reduces iron loss △P Fe1

• Thinner silicon steel laminations

• Improved steel properties to achieve lower losses and provide the same performance

• Optimized air gap




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