What is the difference between a three phase power regulator and a frequency converter

Power regulator: Mainly used in three-phase 380V AC occasions, referred to as three-phase power regulator. Also known as thyristor power regulator, thyristor regulator, thyristor regulator, thyristor regulator, thyristor regulator, power regulator, power regulator, power controller, etc.

Using the cyristor phase shifting principle, it has many advantages such as high efficiency, no mechanical noise and wear, fast response, small size and light weight. The "thyristor power regulator" achieves precise temperature control through precise control of voltage, current and power. And with its advanced digital control algorithm, it optimizes the efficiency of power use.

It plays an important role in saving electricity. The main purpose is to control the temperature well.

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 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, inverters have also been widely used, and the main purpose is to be excellent in motor speed regulation.

The power regulator is a thyristor.

Main loop element! The inverter is the main circuit element of rectifier + capacitance + IGBT! The control principle of the two is also different!

How to excite the three-phase inverter to debug your dear! For inverters of different models, the method of parameter setting is much the same. A basic idea is:

First of all, press the function key (some inverters press the mode key or other similar function keys, and some press twice or n) to make the inverter enter the parameter setting state, and a parameter will be displayed on the display**; Then use the down key and the upper key to cooperate with each other, so that the displayed parameters become the ones that you want to set and modify (these keys are configured in all inverters), then press the confirmation key (all inverters are configured with the confirmation function of the bending balance), and the display content becomes the parameter value that you want to modify**; Then use the three keys of the down key, the up key and the shift key to modify the parameter value of **; Finally, confirm the save. This is repeated until all parameters are set and the operating state is returned. I hope you can help you.

How to excite the three-phase inverter to debug your dear! For inverters of different models, the method of parameter setting is much the same. A basic idea is:

First of all, press the function key (some inverters press the mode key or other similar function keys, and some press twice or n) to make the inverter enter the parameter setting state, and a parameter will be displayed on the display**; Then use the down key and the upper key to cooperate with each other, so that the displayed parameters become the ones that you want to set and modify (these keys are configured in all inverters), then press the confirmation key (all inverters are configured with the confirmation function of the bending balance), and the display content becomes the parameter value that you want to modify**; Then use the three keys of the down key, the up key and the shift key to modify the parameter value of **; Finally, confirm the save. This is repeated until all parameters are set and the operating state is returned. I hope you can help you.

Frequency conversion speed regulation is a speed regulation method that changes the frequency of the stator power supply of the motor, thereby changing its synchronous speed.

The main equipment of the frequency conversion speed regulation system is the frequency converter that provides the frequency conversion power supply, and the frequency converter can be divided into two categories: AC-DC-AC frequency converter and AC-AC frequency converter. This method is suitable for Xiaofeng to be used in occasions that require high precision and good speed regulation performance.

The speed regulation principle of the three-phase asynchronous motor:

The formula of the speed of the three-phase asynchronous electric Qiao Liang motor is: n=60f(1-s) p. As can be seen from the above equation, changing the power supply frequency f, the pole pair p of the motor and the slip rate s can achieve the purpose of changing the speed.

From the point of view of the essence of speed regulation, different speed regulation methods are nothing more than changing the synchronous speed of the AC motor or not changing the synchronous rotation.

In the production machinery, the speed regulation methods that do not change the synchronous speed are widely used, including the rotor string resistance speed regulation, chopper speed regulation, cascade speed regulation of wound motors, and the application of electromagnetic slip clutch, fluid coupling, oil film clutch slag and other speed regulation. <>

Ordinary three-phase asynchronous motors can be adjusted in speed.

If it is a squirrel cage motor, only use the inverter to regulate the speed, if it is a winding motor speed regulation method is more dry and:

1.The frequency converter is used to change the power supply frequency speed regulation, which has a large speed regulation range, good stability and smoothness, and a hard machine grip and rental characteristics. That is, with the added rated load, the speed drops less. It belongs to stepless speed regulation. It is suitable for most squirrel cage asynchronous motors and wired asynchronous motors.

2.Changing the logarithmic speed regulation of the magnetic pole belongs to step-by-step speed regulation, and the smoothness of the speed regulation is poor, and it is generally used in metal cutting machine tools.

3.Change the slip rate to adjust the speed.

1) Rotor loop string resistance: used for AC wound asynchronous motor. The speed regulation range is small, the resistance consumes power, and the motor efficiency is low. Generally used for cranes.

2) Change the power supply voltage to adjust the mega speed, the speed regulation range is small, the torque drops greatly with the voltage drop, and the three-phase motor is generally not used. It is used for single-phase motor speed regulation, such as fans.

3) Cascade speed regulation, the essence is that the rotor introduces additional electromotive force and changes its size to regulate the speed. It is also only used for wound motors, but the efficiency is improved.

The ** of the DC governor is about one or two thousand yuan per unit, and the cheap one is one or two hundred yuan. The ** of DC governor is affected by many aspects, such as brand, category, specification, market, etc. Before choosing to buy, it is necessary to understand and compare in many aspects.

DC governor is a motor speed regulating device, including motor DC governor, pulse width DC governor, thyristor DC governor, etc., generally a modular DC motor governor, set power supply, control, drive circuit in one, using three-dimensional structure layout, control circuit using micro-power consumption components, with a photocoupler to achieve current and voltage isolation transformation, the proportion constant, integration constant and differential constant of the circuit are adjusted with a PID adapter. It has the characteristics of small size and light weight, and can be used alone or directly installed on the DC motor to form an integrated DC ...

Summary. Hello dear, happy to answer your <>

Answer: The disadvantage of 220V to 380V three-phase inverter is that it is easy to cause the diode breakdown on the rectifier side of the inverter, or the filter capacitor on the DC side. Because the inverter for household electricity 220V to 380V is not reliable at all, because the 220V single-phase power supply is one of the phases in the 380V three-phase power supply, it is impossible to turn it into three-phase electricity. Although the inverter can completely turn 220V household electricity into 380V industrial electricity, which is used to drive three-phase asynchronous motors.

The output is an analog sine wave three-phase alternating current with adjustable frequency and voltage, not a standard sine wave, which can only be used to control a three-phase asynchronous motor, and the speed of the motor can be adjusted by changing the output frequency of the inverter, and cannot be used on a single-phase load.

Disadvantages of 220V to 380V three-phase inverter.

Hello dear, happy to answer your <>

Answer: The disadvantage of 220V to 380V three-phase inverter is that it is easy to cause the diode breakdown on the rectifier side of the inverter, or the filter capacitor on the DC side. Because the inverter for household electricity 220V to 380V is not reliable at all, because the 220V single-phase power supply is one of the phases in the 380V three-phase power supply, it is impossible to turn it into a three-phase search and talk about electricity. Although the inverter can completely turn 220V household electricity into 380V industrial electricity, which is used to drive three-phase asynchronous motors.

The output is an analog sine wave three-phase alternating current with adjustable frequency and voltage, not a standard sine wave, usually only used to control the three-phase asynchronous motor, and the speed of the motor can be adjusted by changing the output frequency of the inverter.

11 kilowatt motor needs to be equipped with how big the inverter.

The 11kW motor is paired with a 15kW inverter.

How square should the incoming line be.

It is necessary to use copper wires more than squared.

Single-phase electricity can be converted from a frequency converter to three-phase electricity by using a single-phase to three-phase converter.

Inverter is a power control equipment that applies frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the working power supply of the motor. The inverter is mainly composed of rectification, 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.

Working principle: the main circuit is the power conversion part that provides voltage regulation and frequency modulation power supply for the asynchronous motor, and the main circuit of the inverter can be roughly divided into two types: the voltage type is the inverter that converts the DC of the voltage source into AC, and the filter of the DC loop is capacitor. The current type is an inverter that converts the DC of the current source into AC, and its DC loop filter is an inductor.

It consists of a three-part rectifier that converts the power supply into DC power, and a flat-wave circuit that absorbs the voltage ripples generated by the converter and inverter.

The three-level inverter adopts a clamping circuit, which solves the problem of connecting two power devices in series and makes the phase voltage output have three levels. The main circuit structure of the three-level inverter has few links, and although it is a voltage source structure, it is easy to realize energy feedback. The biggest problem encountered by the three-level inverter in the domestic market is the voltage problem, its maximum output voltage can not reach 6kV, so it is often necessary to use a workaround method, either to change the voltage of the motor, or to add a step-up transformer on the output side.

This weakness limits its application.