YGT系列高效三相永磁同步电动机

无锡市华东电机厂生产的YGT系列超高效三相永磁同步电动机是一种稀土永磁同步电动机，是在异步电机的转子内部安装稀土钕铁硼(NdFeB)永磁体代替异步电机定子绕组中励磁电流所提供的磁场，制成具有自起动能力的永磁同步电机。在稳定运行的时，转子上没有转子电阻损耗，可以减少总损耗的20%～30%，因而效率可提高3～4个百分点，效率达到或超过GB30253-2013《永磁同步电动机能效等级和能效限定值》规定的2级能效（节能评价值）标准。它具有高起动转矩，高过载能力，高效率，高功率因素，运行平稳，维护简单，互换性强等一系列特点，集中了异步电机和一般同步电机的优点，克服了两者的缺点。同时，转子永磁体采用嵌入式可拆卸结构，一旦电机因电气或机械故障烧毁时，在永磁体性能下降或永远失磁的情况下，可方便地进行再充磁或更换永磁体。大大节省了后期维修费用。可取代通用系列异步电机和同步电机应用于各种场合。 

产品经多个油田测试和长期使用，与普通异步电动机相比，平均运行电流降低50%以上；视在功率降低50%以上，功率因素最高达0.98以上，无功节电率达85%，有功节电率达17%，平均节电率达20%～40%。通过中国质量认证中心的节能产品认证，（证书编号：CQC15071128421）是国家“节能产品惠民工程”推广产品，入围工信部《节能机电设备（产品）推荐目录（第六批）》，是中石化电机节能改造指定产品。产品被广泛应用于江汉、河南、华东、中原、胜利、长庆、新疆、吐哈等各大油田。

YGT系列高效三相永磁同步电动机与Y系列异步电机相比，有以下显著优势：

（1）、起动力矩大、过载能力高，降低装机功率

该系列电机起动力矩及过载能力均比Y系列异步电机高一至二（甚至三）个功率等级，最大起动力矩与额定力矩之比可达3.5倍，可直接起动（不需要甩驴头），而且起动平稳，而Y系列异步电动机只有1.6倍，所以在实际使用中可降低装机功率，从根本上解决油田抽油机普遍存在的“大马拉小车”的现象，降低电机运行损耗，提高节能效果。

（2）、高运行效率

该系列电机因无转差损耗，同时，磁场由永磁体产生，不需定子中的无功励磁电流，也没有转子电阻损耗，这是异步电机无法做到的，所以其效率总是比异步电机高3～4百分点，达到GB30253-2013标准的 2级能效标准，且YGT永磁高效同步电动机在轻载时的相当宽的区域内效率为最高，这一区域恰好与油田抽油机的平均负载所在区域相吻合，这就使YGT系列电机与Y系列异步电机相比在整个负载变化范围内的平均效率比Y系列异步电机提高12%，节电效率非常明显。

（3）、高运行功率因素

由于采用永磁体作为励磁源，功率因素可达0.98以上，且经过优化设计，只要负载率达到25%～50%，功率因素即能达到0.8以上，当负载率达到50%以上，功率因素将大大提高，甚至超过额定值，在一定范围内起到补偿电容的作用，而Y系列异步电机平均运行功率因素在0.4以下。由于YGT电机运行自然功率因素已在0.9以上，因而可省掉补偿电容器，减少了补偿设备的投资与维护费用，从而减少了采油成本，增加经济效益。

（4）、挖掘电网潜在容量

采用该系列电机后，电机视在功率减少30%以上，在不增加电网投资的情况下提高了电网的利用率，而挖掘出来的相当一部份电网容量可用于新增油井等产能建设项目。在同等投资情况下，采用YGT系列电机替代Y系列异步电机，即可大幅度提高产出。

（5）、采用双电压方便用户

该系列除常规380V输入电压外，全部采用380V/660V及1140V/660V的双电压输入方式，以适应不同用户电网的要求。特别是采用1140V/660V电压的电机为国内同类产品的首创，采用次高电压，它既减少了电能在供电线路上的损失，又可有效防止社会上的不法之徒占油田电网区域不便管理的空子进行窃电的现象。

（6）、设计独特、延长寿命

YGT系列永磁同步电动机的转子结构采用特殊结构，内部精心设计有冷却循环通道，有效降低转子温升，确保永磁体在最佳温度范围内工作，从而确保永磁体的磁场稳定和延长永磁体的使用寿命，而且永磁体为嵌入式可换结构，一旦电机由于意外情况烧毁，永磁体不可恢复地退磁时，可方便把永磁体从转子上拆下，重新充磁或更换永磁体，节省了维修和维护费用。

（7）、互换性强，维护方便

该系列电机采用Y、Y2系列电机机座，其外形尺寸及安装尺寸与Y、Y2系列异步电机一至，互换性好，在现场更换非常容易。其维护要求也与异步电机相同。所以，替代异步电机非常方便。

本厂生产的YGT系列高效三相永磁同步电动机功率从7.5～45kw；转速有6极1000转/分，8极750转/分；12极500转/分；16极375转/分。输入电压为：380V/660V或1140V/660V。

电机型号示例

YGT系列高效三相永磁同步电动机技术性能指标：

a、电动机外壳防护等级为IP55。

b、电动机冷却方式为IC411。

c、电动机额定工作方式为S1。

d、电机绝缘等级：F级。

e、电动机额定频率为50Hz。

f、电动机额定电压为380V、660V、1140V。

提醒：只有当实际工作电压最接近电机最低反电势时，将得到最佳节电效果，建议用户在安装电机时参照最低反电势，使供电电压维持在最低反电势±10V之内。

g、电机额定转速（r/min） 1500，1000，750，600，500，375

h、电动机在下列环境下能长期运行： 

环境温度：-40℃～+70℃。

海拔高度：不超过3000m。

现场条件：干燥、多风沙。

i、电动机的安装尺寸符合GB/T4772.1-1999标准。

j、出轴形式为锥轴（1:10）或直轴。

K、永磁体为烧结钕铁硼，磁性能不低于35SH，工作温度120℃。

L、执行标准：

无锡市华东电机厂企业标准：Q/320206JSCD04—2014《YGT永磁高效同步电动机技术条件》。

GB14711-93《旋转电机安全要求》

GB/T27744-2011《超高效三相永磁同步电动机技术条件》

JB/T9616-1999《三相异步电动机技术条件》

GB/T13384-1992《机电产品通用技术条件》

客户技术协议

国家有关法律法规的相关规定

YGT series ultra-high efficiency three-phase permanent magnet synchronous motor produced by East China Electric Machinery Factory in Wuxi City is a rare earth permanent magnet synchronous motor. It is a permanent magnet synchronous motor with self-starting capability by installing rare earth NdFeB permanent magnet inside the rotor of the asynchronous motor instead of the magnetic field provided by the excitation current in the stator winding of the asynchronous motor. In stable operation, there is no rotor resistance loss on the rotor, which can reduce the total loss by 20%-30%. Therefore, the efficiency can be increased by 3-4 percentage points, and the efficiency can reach or exceed the level 2 energy efficiency (energy saving evaluation value) standard stipulated in GB30253-2013 "Energy Efficiency Level and Energy Efficiency Limitation Value of Permanent Magnet Synchronous Motor". It has a series of characteristics, such as high starting torque, high overload capacity, high efficiency, high power factor, smooth operation, simple maintenance, strong interchangeability, etc. It concentrates the advantages of asynchronous motor and general synchronous motor, and overcomes their shortcomings. At the same time, the permanent magnet of the rotor adopts the embedded detachable structure. Once the motor is burned down due to electrical or mechanical faults, it can be easily re-magnetized or replaced in the case of permanent magnet performance degradation or permanent loss of excitation. The cost of later maintenance is greatly saved. It can replace the general series of asynchronous motors and synchronous motors for various occasions.

The product has been tested and used in many oilfields for a long time. Compared with the common asynchronous motor, the average operating current has been reduced by more than 50%. The apparent power has been reduced by more than 50%, the power factor has been reduced by more than 0.98, the reactive power saving rate has reached 85%, the active power saving rate has reached 17%, and the average power saving rate has reached 20%-40%. Through the energy-saving product certification of China Quality Certification Center, (Certificate No. CQC15071128421) is the national "energy-saving products benefit people project" promotion product, which is listed in the "Recommended Catalogue of Energy-saving Mechanical and Electrical Equipment (Products) (sixth batch)" of Ministry of Industry and Information Technology, and is the designated product for energy-saving transformation of Sinopec Electric Machinery. Products are widely used in Jianghan, Henan, East China, Central Plains, Shengli, Changqing, Xinjiang, Tuha and other major oil fields.

Compared with Y series asynchronous motor, YGT series high efficiency three-phase permanent magnet synchronous motor has the following remarkable advantages:

(1) Large starting moment, high overload capacity, lower installed power

The starting moment and overload capacity of this series of motors are one to two (or even three) higher than those of Y series asynchronous motors. The ratio of maximum starting moment to rated moment can reach 3.5 times. It can start directly (without throwing donkey head) and start smoothly, while Y series asynchronous motors are only 1.6 times. Therefore, the installed power can be reduced in actual use and oil pumping can be fundamentally solved. The phenomenon of "big horse trolley" commonly exists in the machine, which reduces the running loss of the motor and improves the energy-saving effect.

(2) High operating efficiency

Because of no slip loss, at the same time, the magnetic field is generated by permanent magnet, no reactive excitation current in the stator and no loss of rotor resistance are needed. This is impossible for asynchronous motors, so their efficiency is always 3-4 percentage points higher than that of asynchronous motors, reaching the level 2 energy efficiency standard of GB30253-2013, and YGT permanent magnet high-efficiency synchronous motors are in a fairly wide area under light load. The efficiency is the highest. This area coincides with the average load area of oil pumping units, which makes the average efficiency of YGT series motors in the whole load range 12% higher than that of Y series motors, and the power saving efficiency is very obvious.

(3) High operating power factor

Because of the use of permanent magnet as excitation source, the power factor can reach more than 0.98, and through optimum design, as long as the load rate reaches 25%-50%, the power factor can reach more than 0.8. When the load rate reaches more than 50%, the power factor will be greatly improved, even exceed the rated value, playing the role of compensating capacitance in a certain range, while the average operating power factor of Y series asynchronous motor is 0.4%. Following. Because the natural power factor of YGT motor is over 0.9, compensation capacitor can be saved, investment and maintenance cost of compensation equipment can be reduced, thus oil production cost can be reduced and economic benefits can be increased.

(4) tapping potential capacity of power grid

After using this series of motors, the apparent power of the motor is reduced by more than 30%, and the utilization rate of the power grid is improved without increasing the investment of the power grid. A considerable part of the power grid capacity excavated can be used for new productivity construction projects such as oil wells. Under the same investment situation, YGT series motors instead of Y series asynchronous motors can greatly increase output.

(5) User-friendly with dual voltage

In addition to the conventional 380V input voltage, the series adopts the dual voltage input mode of 380V/660V and 1140V/660V to meet the requirements of different users'power grids. Especially, the motor with 1140V/660V voltage is the first of its kind in China. It uses the sub-high voltage, which not only reduces the loss of electric energy on the power supply line, but also effectively prevents the phenomenon of electricity stealing by the illegal persons in the society who occupy the space of inconvenient management in the oil field power grid area.

(6) Unique design and long life

The rotor structure of YGT series permanent magnet synchronous motors adopts special structure. The cooling circulation channel is carefully designed inside, which can effectively reduce the temperature rise of the rotor and ensure that the permanent magnet works in the optimum temperature range, thus ensuring the stability of the magnetic field of the permanent magnet and prolonging the service life of the permanent magnet. Moreover, the permanent magnet is an embedded convertible structure. Once the motor is burnt down due to unexpected circumstances, the permanent magnet will not work. When the ground demagnetization can be restored, the permanent magnet can be easily removed from the rotor, re-magnetized or replaced, thus saving maintenance and maintenance costs.

(7) Strong interchangeability and convenient maintenance

This series of motors adopt Y, Y2 series motor base. Its shape size and installation size are one to Y, Y2 series asynchronous motors. It has good interchangeability and is easy to replace in the field. Its maintenance requirements are the same as those of asynchronous motors. Therefore, it is very convenient to replace asynchronous motor.

YGT series high-efficiency three-phase permanent magnet synchronous motors produced by our factory have power ranging from 7.5 kW to 45 kw, speed of 6 poles 1000 rpm, 8 poles 750 rpm, 12 poles 500 rpm, 16 poles 375 rpm. The input voltage is 380V/660V or 1140V/660V.

Examples of motor models

YGT series high-efficiency three-phase permanent magnet synchronous motor technical performance indicators:

A. The protection level of motor housing is IP55.

B. The cooling mode of motor is IC411.

C. The rated working mode of motor is S1.

D. Motor insulation grade: F grade.

E. The rated frequency of the motor is 50Hz.

F. The rated voltage of the motor is 380V, 660V and 1140V.

Reminder: Only when the actual working voltage is closest to the lowest back EMF of the motor, will the best power saving effect be obtained. It is suggested that the user refer to the lowest back EMF when installing the motor, so that the supply voltage can be maintained within the lowest back EMF (+10V).

G. rated motor speed (r/min) 1500, 1000, 750, 600, 500, 375

H. The motor can operate for a long time in the following environments:

Ambient temperature: - 40 70.

Elevation: no more than 3000m.

Site conditions: dry and sandy.

I. Installation dimensions of motors conform to GB/T4772.1-1999 standards.

J. The outlet shaft is conical (1:10) or straight.

K and permanent magnet are sintered Nd-Fe-B with magnetic properties not less than 35SH and working temperature of 120 C.

L. Implementation criteria:

Wuxi East China Electric Machinery Factory Enterprise Standard: Q/320206 JSCD04-2014 "YGT Permanent Magnet High Efficiency Synchronous Motor Technical Conditions".

GB14711-93 "Safety Requirements for Rotating Motor"

GB/T 277444-2011 Technical Specifications for Ultra-high Efficiency Three-phase Permanent Magnet Synchronous Motor

JB/T9616-1999 Technical Conditions for Three-phase Asynchronous Motor

GB/T13384-1992 General Technical Conditions for Mechanical and Electrical Products

Customer Technical Agreement

Relevant Provisions of Relevant National Laws and Regulations