Description
hardware flow control. It is an ideal choice in the field of industrial automation.
2. Principle of frequency converter
In embedded development, the control of motors is often involved. Currently, frequency conversion control of AC motors is widely used, so let”s briefly introduce the
frequency converter by looking at the diagram, assuming that you already understand the principle of the motor.
The block diagram is as follows:
The frequency converter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit, microprocessing unit, etc.
The inverter relies on the switching 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, thereby achieving the purpose of energy saving and speed regulation. In addition, the inverter also has many protection functions.
, such as overcurrent, overvoltage, overload protection, etc. With the continuous improvement of industrial automation, frequency converters have also been widely used.
A typical inverter system diagram is shown below. It mainly includes operation panel, VFD controller, motor and other parts.
1. Typical structure:
Mainly includes: control platform, measurement circuit, power circuit, protection circuit, etc.
There are two common types of frequency converters: voltage type and current type. Among them, the power inverter part mostly uses power
tubes such as IGBT and IGCT.
2. Typical algorithm:
Among them, the control algorithm represented by Siemens is mainly based on coordinate transformation (vector control). Friends who are
interested in the algorithm represented by ABB can search for information by themselves (direct torque control) and will not go into details here.
3. Vector control:
Many chip MCU and MPU manufacturers have provided block diagrams and algorithm libraries for variable frequency vector control. Those
who are interested can study it. For example, the following figure is a block diagram provided by Microchip
Display operation panel 3HAC8627-1
Display operation panel 3HAC8593-1
Display operation panel 3HAC8500-6
Display operation panel 3HAC8409-1
Display operation panel 3HAC8311-2
Display operation panel 3HAC8280-1
Display operation panel 3HAC8278-1/04
Display operation panel 3HAC8185-4
Display operation panel 3HAC8085-2
Display operation panel 3HAC7998-8
Display operation panel 3HAC7998-7
Display operation panel 3HAC7970-1
Display operation panel 3HAC7681-1
Display operation panel 3HAC7681-1
Display operation panel 3HAC7664-1
Display operation panel 3HAC7457-3
Display operation panel 3HAC7344-1
Display operation panel 3HAC7344-1
Display operation panel 3HAC7310-1
Display operation panel 3HAC7149-1
Display operation panel 3HAC6877-1
Display operation panel 3HAC6792-1
Display operation panel 3HAC6762-1
Display operation panel 3HAC6696-1
Display operation panel 3HAC6449-1
Display operation panel 3HAC6428-1/04
Display operation panel 3HAC6428-1/04
Display operation panel 3HAC6314-1
Display operation panel 3HAC6268-1
Display operation panel 3HAC6157-1
Display operation panel 3HAC6157-1
Display operation panel 3HAC5981-1
Display operation panel 3HAC5948-1
Display operation panel 3HAC5947-1
Display operation panel 3HAC5902-1
Display operation panel 3HAC5889-1
Display operation panel 3HAC5885-1
Display operation panel 3HAC5824-10
Display operation panel 3HAC5704-1
Display operation panel 3HAC5700-1
Display operation panel 3HAC5681-1
Display operation panel 3HAC5566-1
Display operation panel 3HAC5566-1
Display operation panel 3HAC5548-2
Display operation panel 3HAC5518-1
Display operation panel 3HAC5518-1
Display operation panel 3HAC5507-1
Display operation panel 3HAC5498-1
Display operation panel 3HAC5498-1
Display operation panel 3HAC5497-1
Display operation panel 3HAC5497-1
Display operation panel 3HAC5463-1
Display operation panel 3HAC5347-1
Display operation panel 3HAC5246-7
Display operation panel 3HAC5246-65
Display operation panel 3HAC5246-2
Display operation panel 3HAC5025-1
Display operation panel 3HAC5021-1
Display operation panel 3HAC4837-2
Display operation panel 3HAC4836-3
Display operation panel 3HAC4803-2
Display operation panel 3HAC4758-1
Display operation panel 3HAC4738-6
Display operation panel 3HAC4738-34
Display operation panel 3HAC4738-26
Display operation panel 3HAC4731-6
Display operation panel 3HAC4627-1
Display operation panel 3HAC4562-1
Display operation panel 3HAC4561-1
Display operation panel 3HAC4339-2
Display operation panel 3HAC4314-7
Display operation panel 3HAC4272-1
Display operation panel 3HAC4247-5
Display operation panel 3HAC4247-2
Display operation panel 3HAC4232-1
Display operation panel 3HAC4127-6
Display operation panel 3HAC4125-1
Display operation panel 3HAC4124-7
Display operation panel 3HAC4057-6
Display operation panel 3HAC4057-2
Display operation panel 3HAC3961-1
Display operation panel 3HAC3865-96
Display operation panel 3HAC3865-45
Display operation panel 3HAC3865-34
Display operation panel 3HAC3865-16
Display operation panel 3HAC3838-4
Reviews
There are no reviews yet.