What is a green inverter?

The quality standards of green inverters are:

The input and output currents are both sine waves, and the input power factor is controllable, and the power factor can be 1 when any load is used, and any controllable output frequency up and down the power frequency can be obtained. The AC reactor built in the inverter can suppress harmonics well, and at the same time can protect the rectifier bridge from the influence of the instantaneous sharp wave of the power supply voltage, and the practice shows that the harmonic current without the reactor is significantly higher than the harmonic current generated by the reactor. In order to reduce the interference caused by harmonic pollution, a noise filter can be installed in the output loop of the frequency converter.

And if the inverter allows, reduce the carrier frequency of the inverter. In addition, in high-power inverters, 12-pulse or 18-pulse rectification is usually used, so that in the power supply, the harmonic content is reduced by eliminating the lowest harmonics. For example, with 12 pulses, the lowest harmonics are the 11th, 13th, 23rd, and 25th harmonics.

By analogy, for 18 pulses, the lowest harmonics are the 17th and 19th harmonics.

Green inverter is an academic concept, green inverter refers to the active rectifier inverter, which has been defined in the IEC standard IEC61800-9-2:2017, but there is no standard for this product. IEC is named AIC (Active Infeed Converter) rectifier.

Translation name: Active rectifier (also known as active front-end rectifier, active front-end) refers to a rectifier that uses a fully controlled power device, energy can flow in both directions, and the input displacement factor can be arbitrarily set at the same time.

The green inverter should mean that he is energy-saving and environmentally friendly! Power saving! Isn't everything advocating green and pollution-free now!

That's probably what it means! Changsha Tuotian energy-saving on these inverters, including Fuji, Inovance, Willen, Emerson, etc., are provincial and after-sales centers, inverters are power-saving.

It is the kind that can suppress high-frequency harmonics that interfere with the power grid.

It's not clear that the components are so small, have you seen what the model is, you can know the model number, you can also find the model data sheet to know, the specific relevant information hard city someone understands, you go and take a look.

The four-quadrant refers to the fact that the mechanical characteristic curve of its operation can be operated in all four quadrants on the mathematical axis. The first quadrant is in the positive and electric state, the second quadrant is in the feedback braking state, the third quadrant is reversed in the electric state, and the fourth quadrant is reversed in the braking state. A frequency converter that enables the motor to work in four quadrants is called a four-quadrant inverter.

Frequency converter (variable-frequency

DRIVE, VFD) is a power control equipment 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) and filter.

Wave, 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 conversion.

It is also very widely used.

1. To set the motor parameters, tell the inverter motor;

2. To set the frequency parameters, upper and lower limit frequencies, etc.;

3. To set the operation, functional parameters, acceleration and deceleration time, parking mode, theoretically speaking, the motor of the inverter start control should be the inverter motor, the main reason is that the heat during low-frequency operation, the inverter motor generally has a coaxial fan or an external power supply fan, and the ordinary motor generally does not. But in fact, sometimes the enterprise is convenient for transformation (the load running frequency is around the power frequency), and sometimes the ordinary motor is used (sometimes an axial fan is also installed to blow on the motor). As for the heavy-load start, it can be set by the inverter starting curve, and generally there will be no problem as long as the motor output is sufficient.

The insulation and temperature rise of the inverter motor and inverter cable should be higher than that of the ordinary motor, but in fact, because we mainly follow the process of the Soviet big brother in China, the actual configuration of the cable and the motor is higher than the demand (for example, YJV low-voltage cable, insulation is, that is, 600V to the ground, 1kV between phases, and the motor is also F-level insulation B-level temperature rise), so the insulation and temperature rise curve can adapt to the working requirements of ordinary inverters, but because the heat dissipation is not good (that is, there is no fan), Long running time can cause destructive damage to motor bearings and insulation.

The inverter can be operated only by connecting the power supply and the motor line, because it is a soft start device, which can start from 0 to the speed regulation function of the maximum speed, and its starting characteristics are much better than the soft start ladder start, so the use of the frequency conversion controller, there is no need for soft start.

If you want to control the speed of the motor, you need to have a potentiometer to adjust the analog quantity at a given frequency.

Of course, the premise is that the inverter panel control, or factory settings, or newly bought, has not changed the parameters, because the inverter works in the form of panel control at the factory, and it only needs to be connected. rst。Power cord,.

and vuw, the motor line is on the line, press the red color of the panel, and then press the upper button of the scissor head. "Or, press the upper button first, press the green start button" The motor will rotate, if the direction is wrong, swap the output line of the inverter, or change the direction of the inverter, and, have you not touched the inverter. What is called is not true, the most basic common sense, the inverter factory is like this. I hope it can help you, and also, the line is connected, and you must also press the up and down keys of the inverter display panel to work "plus and minus frequency", and the red and green buttons, that is, the start and stop buttons.