【Scientific and Technological Achievements Promotion】 Motor System Energy Saving Design Simulation Service

Motors are widely used in China's energy, chemical, metallurgy, petrochemical, chemical, coal, building materials, public facilities, household appliances and power drag and other industries and fields, is the foundation of China's industrial base. The number of motors in my country is 1.9 billion kilowatts, and the total power consumption is 3.8 trillion kWh, accounting for 64% of the total power consumption of the whole society. Among them, the total power consumption of motors in the industrial field is 2.9 trillion kWh, accounting for about 75% of the industrial power consumption. It is a veritable "Big electricity consumer".

With the implementation of China's "National Motor Energy Efficiency Improvement Plan", the market share of high-efficiency motors has steadily increased, narrowing the gap with developed countries in terms of stock motor efficiency, and the efficiency of motor products is 2% to 3% lower than the advanced level of foreign countries. Due to the motor production enterprises, supporting machinery manufacturing enterprises and motor end users generally lack of energy-saving awareness and means to promote the motor system, do not have the conditions to optimize the design of motors and systems according to the actual operating load conditions, resulting in the actual operating efficiency of China's motor system than foreign advanced level of 10% to 20%.

Solving the problem of energy saving of motor system is of great significance to improve the economic efficiency of enterprises and protect the environment, and it is an important way to achieve the goal of energy saving and emission reduction.

Xiao Bian today for everyone to introduce in detailHow does the Institute of Power Transmission Application Technology of our hospital realize the energy saving and consumption reduction of motor through the energy saving design simulation service of motor system.

 

science and technology research and development

First of all, Xiaobian to introduce what isMotor system energy saving design simulation service?

Motor system energy-saving design simulation is to provide integrated design solutions and processes for the development trend and related technical challenges of permanent magnet, high speed, integration, intelligence, high efficiency and energy saving of motors, efficient realization of motor from magnetic circuit method to finite element, from components to systems, from electromagnetic to multi-physical field coupling of multi-field, multi-level, integrated motor and drive/control system technical consultation, commissioned development, cooperative development, technology transfer, personnel training and other services.

 

Are you still troubled by the energy-saving design of motor systems?

Are you still at a loss as to how to meet customers' ever-increasing product energy efficiency requirements?

How to consider the influence of control circuit and control algorithm on system efficiency in motor design?

How to control the reasonable cost of the motor while optimizing the performance of the motor?

Choose motor system energy saving design simulation service let you no longer worry!

 

What problems can motor system design simulation services help you solve?

01 Motor Design Analysis

According to the design index and application situation, the preliminary design of electromagnetic scheme is completed by magnetic circuit method, and the scheme optimization is completed by means of parametric design function. The electromagnetic parameters such as magnetic field distribution, magnetic field harmonics, winding inductance and magnetic leakage coefficient are accurately analyzed by electromagnetic field finite element method, and the magnetic circuit structure is further optimized.

02 Virtual Prototype Test

Through the motor virtual test platform, users can carry out various tests on the actual working conditions of the motor without making a prototype. For different motor types, solvable virtual test models can be automatically generated from the results of the magnetic circuit method to carry out no-load test, load test, locked-rotor test, sudden or sudden unloading load, three-phase short circuit and other motor performance tests under various conditions, so as to accurately predict the motor performance, parameters that are difficult to obtain in analytical tests.

03 Co-simulation of electromechanical system

It is applied to the analysis of motors, controllers and mechanical loads in complex applications, solves the simulation analysis of motor drive systems or servo mechanisms, generates motor lumped parameter models, multi-loop models and finite element joint simulation models, and completes the multi-physical field collaborative simulation of motors, controllers and mechanisms through the electromechanical system collaborative simulation interface to solve the optimization problem of motor systems.

 

technological innovation and advantages

At present, the international advanced motor can realize the motor system self-diagnosis, self-protection, self-control, remote control and other intelligent, automatic control. For small and medium-sized motor systems used in the industrial field, research on the reasonable matching of motor, load, speed control system, optimization design and energy-saving control technologies, development of new motor energy-saving control devices, motor system energy efficiency analysis and management software, etc., to achieve integrated design and manufacturing of motor system control, sensing, drive and other functions to meet the needs of different working conditions and load characteristics, has been accepted by more and more scientific research institutions and enterprises.

The Institute of Motor Transmission of our institute has many years of practical experience in power transmission and control, energy-saving design simulation of motor systems and product research and development. The following small series will take you to further understand our technological innovation and advantages in the field of energy-saving design simulation service of motor systems:

1. Rare earth permanent magnet synchronous motor

The permanent magnet synchronous motor uses rare earth permanent magnet as the excitation material of the rotor, which eliminates the energy consumption of the rotor from the structure. The energy efficiency of the motor is increased by 5-10 percentage points on average compared with the asynchronous induction motor, and the power factor is increased by 10-15 percentage points. The energy saving effect brought by the replacement reaches more than 10% on average.

Design and Simulation of Electromagnetic Field and Temperature Field of Permanent Magnet Synchronous Motor

2. Low speed high torque rare earth permanent magnet geared motor

An integrated driving device composed of medium-speed rare earth permanent magnet motor and X-type planetary reducer, with output speed n≤ 200rpm and output torque T = 0.15 ~ 5502kN.m. It has the characteristics of small size, high efficiency and large torque, and can widely replace the traditional low-speed and high-torque foreign drive device of "Asynchronous Motor Gearbox Fluid Coupling.

Operation Characteristics of Permanent Magnet Synchronous Gear Motor

3. Energy feedback type electromagnetic coupling speed control system

Technical advantages

1. The system efficiency is higher than the variable frequency speed regulation system;

2. Heavy load starting ability, starting torque multiples of 2.2;

3. Non-contact transmission, effective isolation of vibration and noise;

4. Non-arc commutated permanent magnet DC motor

Technical advantages

1. The use of electronic freewheeling circuit to assist mechanical commutation without arc generation;

2. Greatly improve the torque and power density of permanent magnet DC motor;

The motor system is easy to manufacture, low cost, low loss and high efficiency.

5. Variable frequency speed permanent magnet synchronous electric (PMSM) machine position sensorless vector control software

Through software simulation, model calculation and experimental verification, the position sensorless vector control software of variable frequency speed permanent magnet synchronous motor (PMSM) is developed, and the position sensorless vector control software of variable frequency speed permanent magnet synchronous motor with independent intellectual property rights is formed, which can be moved on a variety of control chips. Focus on solving the low-speed section of the rotor position observation accuracy, low-speed torque compensation and other issues, to help enterprises to achieve product optimization of foreign control software replacement.

Global Chopping PFC Waveform

 

Industrial Applications

Application in Shagang 2500kW Winding Type Permanent Magnet Coupling Governor

1500kW,750-1500r/min inductive electromagnetic coupling governor developed for Guodian

Permanent Magnet Synchronous Gear Motor for Belt Conveyor

 

Research Institute of Power Transmission Applied Technology

The Institute of Power Transmission Application Technology of our institute was established in November 2016. Relying on the comprehensive technical strength of the Department of Electrical Engineering and Applied Electronic Technology, the State Key Laboratory of Power System and Large Power Generation Equipment Safety Control and Simulation, it has established extensive cooperative relations with domestic and foreign motor design and simulation development institutions and enterprises. The team is headed by Professor Chai Jianyun, a senior expert from the Department of Electrical Engineering and Applied Electronic Technology of Tsinghua University. The core members of the team come from well-known universities and enterprises at home and abroad. They have many years of practical experience in power transmission and control, energy-saving design and simulation of motor systems, and product research and development, scientific research achievements have been applied to electric power, petroleum, rubber and plastics, papermaking, transportation, machinery and other industries, and have established technical cooperation relations with many enterprises in Shandong, Hebei, Jiangsu, Anhui, Shaanxi and other places.

 

Technical docking and business negotiation

Contact: Guo Qijiang

Fixed telephone: 022-84819376

Mobile Phone: 13332029286

E-mail: guoqj@tsinghua-tj.org

Fax: 022-84819375

 

Source | Institute of Power Transmission Application Technology

Editor | Wang Xiao

The final interpretation of the above related technologies belongs to the Institute of Power Transmission Application Technology.