How big is the application range of vector inverter?

The vector inverter technology is based on the DQ axis theory. The basic idea is to divide the motor current into D axis current and Q axis current, where the D axis current is the excitation current and the Q axis current is the torque current. In this way, the excitation current and torque current of the AC motor can be controlled separately, so that the AC motor has control characteristics similar to those of the DC motor. It is an ideal control theory designed for AC motors, which greatly improves the control characteristics of AC motors.

Today, the editor of the vector inverter manufacturer will introduce the application range of vector inverters

1. Operating machinery requiring high-speed response 3360 For example, the speed response of the industrial robot drive system needs to be at least 100rad/s, and the maximum speed response that the vector control drive system can achieve can reach 1000rad/s, ensuring the fast and accurate operation of the robot drive system.

2. Adapt to harsh working environments: For example, papermaking machines and printing and dyeing machines need to work in environments with high humidity, high temperature and corrosive gases, and asynchronous motors are more suitable than DC motors.

3. High-precision electric drive: such as steel plates, winders, etc., which belong to constant tension control, have high requirements for dynamic and static accuracy of electric drive, and can achieve high speed (weak magnetic field), low speed (jog), and forced braking when parking. After adopting vector control, the static error of the asynchronous motor is 0.02%, which can completely replace the V-MDC speed regulation system.

4. Four-quadrant operation: For example, high-speed elevator drive, which used to be DC drive, is now gradually replacing the asynchronous motor vector control variable frequency speed regulation system.

What are the troubleshooting methods for vector inverter maintenance?

Vector inverter maintenance is a combination of theoretical knowledge, practical experience and operation level. The technical level of maintenance personnel determines the maintenance quality of the inverter. Technicians engaged in inverter maintenance need to study hard, understand the functions and characteristics of the electronic components inside the inverter, expand their knowledge, apply the newly learned knowledge to actual work, and continuously improve the maintenance technology level.

So, what are the ways to eliminate faults in the maintenance of vector inverters?

Motherboard failures are often manifested as system startup failures, screen failures, etc. This is difficult to judge intuitively. The maintenance methods listed below have their own advantages and disadvantages, and can be used together to troubleshoot.

1. Cleaning method

Use a brush to gently brush off the dust on the motherboard. In addition, there are some cards on the motherboard, and the chip is in the form of pins, which often cause poor contact due to pin oxidation. You can use an eraser to wipe off the oxidized surface and then insert the link again.

2. Observation method

Repeatedly check the board to be repaired, check whether the plug and socket are skewed, whether the resistor and capacitor pins are in contact, whether the surface is burned, whether there are cracks on the chip surface, whether the copper foil on the motherboard is burned, etc. At the same time, check whether there is any foreign matter falling between the motherboard components. If you have any problems, you can measure it with the help of a multimeter. Touch the surface of the chip. If it is abnormally hot, replace the chip and try it.

3. Measurement method
To avoid accidents, the resistance between the power supply and the 5V and ground (GND) on the motherboard should be measured before charging. The simpler method is to measure the resistance between the chip power pin and the ground. When there is no power plug, the resistance should usually be 300, and the minimum value should not be less than 100. Measure the reverse resistance value again, which is slightly different, but not too different. If the positive and negative resistance values ​​are small or close to conduction, it indicates that a short circuit has occurred and the cause of the short circuit should be checked.

Guangdong Dingshen Electrical Technology Co., Ltd.'s main products include inverters, vector inverters, high-performance inverters, economical inverters, etc. Founded in 2014, the company is a high-tech enterprise focusing on the complete independent research and development, manufacturing, design, sales and service of motor controllers and industrial automation controllers. The company has a loyal and high-level cooperative team. The team has rich field experience and problem-solving ability, solid product design and development skills, innovative, open and free R&D team atmosphere, many years of automation industry service experience, a deep understanding of customer needs and industry development trends, and a strong combination with distribution channels to serve customers in real time.