The speed regulation efficiency is high, which belongs to the efficient speed regulation mode. This is because after the frequency change, the motor still runs around the synchronous speed, and basically maintains the rated slip. It is only in the frequency conversion device system that there will be current loss, and due to the influence of higher harmonics, the loss of the motor increases, and the efficiency decreases.

The frequency converter is a device that converts the power frequency power supply (50Hz or 60Hz) into AC power of various frequencies to realize the variable speed operation of the motor. Among them, the control circuit completes the control of the main circuit, the rectifier circuit converts AC power into DC power, the DC intermediate circuit smoothes the output of the rectifier circuit

The frequency converter includes a rectifier circuit and an inverter circuit. The input AC power is converted into a DC voltage through a rectifier circuit and a wave circuit, and then the inverter converts the DC voltage into a pulse voltage of different width (called pulse width modulation voltage, PWM) . Use this PWM voltage to drive the motor to adjust the torque and speed of the motor.

Summer is the frequent season of inverter faults. The key to ensuring long-term stable and reliable operation of the inverter is daily maintenance. In order to ensure that the inverter can operate stably in high temperature and hot summer, it is reduced due to improper maintenance or on-site operating environment. Unnecessary unplanned shutdowns are caused.

In the actual speed regulation process, a common AC power source with adjustable frequency can not meet the requirements for the speed control of the asynchronous motor. It must also consider the effective use of the motor magnetic field, suppress the starting current and obtain the ideal torque characteristics, such as Low-frequency torque characteristics and other issues.

How much do you know about the inverter wiring specifications? The signal line and the power line must be routed separately: when using analog signals to control the inverter remotely, in order to reduce the interference of the analog quantity from the inverter and other equipment, please control the signal line and the strong circuit (main circuit) of the inverter And sequence control circuit) separately.

The motor soft starter is a new type of starting equipment with the international advanced level designed and produced using power electronic technology, micro-processing technology and modern control theory.

The frequency converter is a power control device that uses frequency conversion technology and microelectronic technology to control the AC motor by changing the frequency of the working power of the motor. It has a wide range of applications, including conveyors, feeders, mixers, grinders, pulverizers, paper cutters, calenders, extruders, valves, compressors

China's urbanization rate has been increasing year by year, and high-rise buildings are being constructed in cities. With this, the construction of fire-fighting projects has attracted more and more attention from all walks of life. In the current water fire fighting, the frequency conversion speed regulation pump technology has been widely used. Its wide frequency conversion range can meet the requirements of different fire protection environments

There are many function parameters of the inverter. Generally, there are dozens or even hundreds of parameters for users to choose. In practical applications, it is not necessary to set and debug each parameter, and most of them only need to use the factory set values. However, some parameters have a lot to do with actual use, and some are related to each other

Many friends have discovered that the inverter damages the motor. For example, in a pump factory, in the past two years, his users frequently reported that the pump was damaged during the warranty period. In the past, the product quality of this pump factory was very reliable. After investigation, it was found that these damaged pumps were driven by frequency converters.

The temperature and humidity of the surrounding environment should be detected first. If the temperature is too high, it will cause the inverter to overheat. If it is serious, it will directly cause damage to the inverter's power components and short circuit. If the air is too humid, it will cause a direct short circuit inside the inverter. When the inverter is running

As a precision electronic industrial control device, in order to make the inverter run smoothly and smoothly for a long time, as a professional technician, we also need to have four environmental factors directly affecting the operation of the inverter before the inverter is installed or running. Get started and do a good job of preparation.

Inverter is a converter that converts alternating current with constant voltage and frequency into alternating current with variable voltage and frequency. It is mainly used in places where speed regulation is required.

With the development of the times, the development of the industrial industry is also developing rapidly, and the range of use of frequency conversion control cabinets is getting wider and wider. So, why are frequency conversion control cabinets so popular? Let ’s take a look at the relevant knowledge of the inverter control cabinet with Xiaobian:

Under different operating conditions, there are still some unsatisfactory aspects of the frequency converter, resulting in the shortening of its service life and the corresponding increase of the installation, commissioning, daily maintenance and repair workload of its auxiliary equipment, thus causing significant direct and indirect economic losses to users. This paper analyzes the application environment

I believe a lot of power to drive practitioners are not familiar with, as opposed to conventional electrical circuit control, high technology content converter, it is a combination of strong and weak electrical equipment, so its failure varied, only constantly sum up experience combined with theoretical knowledge from practice

Converter and inverter technology is the application of microelectronic technology, a power control device for controlling the AC motor by changing the frequency of the motor operating power mode.

Soft starter is a novel motor control device that integrates motor soft start, soft stop, light load energy saving and multiple protection functions. It is called Soft Starter abroad. The domestic soft starter is the most famous Heping hps2 series soft starter. Its main composition is a three-phase parallel thyristor and its electronic control circuit connected in series between the power supply and the controlled motor.

Whether the inverter can save power is a vague question. If the frequency is not changed and the frequency is running at 50HZ, the motor controlled by the inverter is not energy-saving. As long as the frequency is changed and the frequency is below 50HZ, there is no doubt that the motor controlled by the inverter is It is energy-saving. In industrial power, inverters are used to control most of the motors, such as cooling fans.