Is there any technical help to answer what an inverter is?

The inverter is an electric energy control device that uses the on-off effect of power semiconductor devices to convert the power supply into another frequency. It is mainly composed of two parts of circuits, one is the main circuit (rectifier module, electrolytic capacitor and inverter module), and the other is the control circuit (switching power supply board, control circuit board). The CPU is installed on the control circuit board, the operating software of the inverter is burned on the CPU, the inverter software of the same model is fixed, the only exception is the three-crystal inverter, the software can be changed according to the use requirements.

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Inverter composition: rectifier circuit, flat wave circuit, control circuit, inverter circuit.

Function: Adjust the speed of the motor by changing the frequency, so as to achieve the effect of power saving.

Inverter is an electrosensitive device that controls the AC motor by changing the frequency of the motor's working power supply.

The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit, microprocessor unit, etc. The inverter relies on the interruption of the internal IGBT to adjust the voltage and frequency of the output power supply, and provides the required power supply voltage according to the actual needs of the motor, so as to achieve the purpose of energy saving and speed regulation. With the continuous improvement of industrial automation, frequency converters have also been widely used.

Variable-frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The background of the birth of frequency conversion technology is the extensive demand for stepless speed regulation of AC motors. The application of the DC speed regulation technology is limited due to its large size and high failure rate.

The inverter of the frequency converter is energy-saving

The energy saving of the inverter is mainly manifested in the application of fans and pumps. After the fan and pump load adopts frequency conversion speed regulation, the power saving rate is 20% to 60%, because the actual power consumption of the fan and pump load is basically proportional to the cubic of the speed. When the average flow required by the user is small, the fan and pump use frequency conversion speed regulation to reduce the speed, and the energy-saving effect is very obvious.

However, the traditional fans and pumps use baffles and valves to adjust the flow, and the speed of the motor is basically unchanged, and the power consumption does not change much. According to statistics, the electricity consumption of fans and pump motors accounts for 31% of the country's electricity consumption and 50% of industrial electricity consumption. It is of great significance to use a variable frequency speed control device on such loads.

At present, the more successful applications are constant pressure water supply, various types of fans, air conditioning and hydraulic pump frequency conversion speed regulation.

Inverter technology is the technology that changes the frequency of power supply.

The most electric energy on the market (the electricity sold by the power supply bureau) is alternating current. Voltage and current that change regularly in magnitude and direction over time are calledAlternating current。Alternating current in our countryPower supply frequencyIt's 50 Hz.

The speed of the AC motor and the electrical energy consumed by various electrical appliances are directly related to the frequency of power supply;

Inverter technologyIt is to control the speed of the motor or the electric energy consumed by the electrical appliance by changing the frequency of power supply to the electrical appliance, so as to achieve the purpose of flexible control of the electrical appliance and reduce the electric energy consumption;

A device that changes the frequency at which an electrical appliance is supplied with electricity is calledFrequency converters。Its function is to convert direct current (in many cases, it is necessary to convert the external AC power into DC power first) and convert it into AC power supply of different frequencies as needed.

Frequency conversion technology is a conversion technology that converts direct current into alternating current at different frequencies. It can convert alternating current into direct current and then reverse it into alternating current at different frequencies, or convert direct current into alternating current and then turn alternating current into direct current. In short, all this is only a change in frequency, not a change in electrical energy.

The inverter is an electric energy control device that uses the on-off effect of power devices to convert the power supply of power frequency to another frequency.

The inverter is used to change the frequency and amplitude of the AC motor power supply, so as to change the period of its moving magnetic field, so as to achieve the purpose of smoothly controlling the speed of the motor.

The emergence of the inverter has simplified the complex speed control and replaced most of the work that could only be done with the DC motor with the combination of the inverter and the AC squirrel cage induction motor, which reduced the volume and reduced the maintenance rate, and made the transmission technology develop to a new stage.

The function of the inverter:

The function of the inverter is mainly to adjust the power of the motor and realize the variable speed operation of the motor to achieve the purpose of power saving. At the same time, the function of the inverter can reduce the voltage fluctuation of the power line, because the voltage drop will cause the voltage-sensitive equipment in the same power supply network to trip or work abnormally. After the inverter is adopted, the function of the inverter can be gradually started at zero frequency and zero voltage, which can eliminate the voltage drop to the greatest extent and play a greater advantage.

At the same time, the function of the inverter also includes the following functions:

1.It can reduce the impact on the power grid, and it will not cause the problem of excessive peak-to-valley difference.

2.The acceleration function can be controlled, so that the acceleration can be smoothly carried out according to the user's needs.

3.The motor and equipment stop mode is controllable, so that the whole equipment and system are safer, and the service life will be increased accordingly.

4.Control the starting current of the motor, fully reduce the starting current, and reduce the maintenance cost of the motor.

5.It can reduce the wear and tear of mechanical transmission components, thereby reducing procurement costs and improving system stability.

6.The motor starting current is reduced, providing a more reliable variable voltage and frequency.

7.It effectively reduces the reactive power loss and increases the active power of the power grid.

8.Optimize the process and can change quickly according to the process, and can also achieve speed changes by remote control of PLC or other controllers.

9.Multiple protection makes the inverter highly intelligent, which can not only protect its own safe and normal use, but also greatly protect the safe operation of the front and rear equipment.

10.The control function is complete, and it can be well cooperated with other control equipment and instruments to realize centralized real-time monitoring and control of systematic networking, integrated development, and save the trouble of system compatibility for users and save costs.

To put it simply, in layman's terms:

The inverter controls the output frequency and torque of the motor, because the voltage given by the grid is two-phase 220V, three-phase 380V and 50Hz, when you want to output different frequencies and sizes of voltage, the power grid can not provide, so the grid voltage is converted into the frequency and torque that the motor wants to achieve through the inverter.

Schneider's inverter is good, and there are many different applications, but the selection of inverter generally depends on the performance requirements and cost performance you want to achieve.

The inverter mainly plays the function of slow start and stop, speed regulation, reducing the impact on the mechanical part and saving energy.

Schneider inverter is very good, a well-known automation brand in Europe.

The inverter is mainly composed of rectification, filtering, inverter, braking unit, monitoring unit and microprocessor unit. The full name of Schneider inverter is "Schneider AC inverter governor", which is a brand developed and manufactured by Schneider Electric Group in France. It is mainly used to control and regulate the speed of three-phase asynchronous motors, which occupies an important place in the inverter market and can be used in industrial fields, especially in elevators, textiles, machine tools, lifting and transportation industries.