3 7kw and 5 5kw inverter braking resistors are universal

No! The brake unit is different.

1: Braking resistor, which is a kind of corrugated resistance, is mainly used in the mechanical system of the inverter to control the rapid shutdown of the motor, helping the motor to convert the regenerative electrical energy generated by the rapid shutdown into thermal energy.

2: In addition to the choice of braking resistance is limited by the maximum allowable current of the special energy consumption braking unit of the inverter, there is no clear correspondence with the braking unit, and its resistance value is mainly selected according to the size of the required braking torque, and the power is determined according to the resistance value and usage rate of the resistor. There is an inviolable principle in the selection of braking resistor resistance:

It should be ensured that the current IC flowing through the braking resistor is less than the maximum allowable current output capacity of the braking unit, i.e., r > 800 IC, where 800 is the maximum DC voltage that may occur on the DC side of the inverter.

IC – the maximum allowable current of the braking unit.

It is estimated that it can not be found, CVF-G3 series inverter was discontinued as early as about 10 years, and became a series of inverters, and in 12 years, the series of inverters were also discontinued.

Moreover, the series of inverters no longer have this power, only 4kw and 3kw.

You can check the table in the sample, some models do not have a separate model, such as Taiwan Puchuan inverter, PI-168S model with braking resistor, you can do it. If the model with B is selected, the inverter is equipped with a braking resistor, and its maximum braking torque is 50%. If you want to match, 380V, 400, 300W.

There is a table to check.

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, frequency converters have also been widely used.

The main circuit is the power conversion part that provides voltage regulation and frequency regulation power supply for the asynchronous motor, and the main circuit of the inverter can be roughly divided into two categories: the voltage type is the inverter that converts the DC of the voltage source into AC, and the filter of the DC loop is the 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 three parts: a "rectifier" that converts the power supply into DC power, a "flat wave loop" that absorbs the voltage ripples generated by the converter and inverter, and an "inverter" that converts DC power into AC power.

The 750W inverter is equipped with a large 8 ohm brake resistor. The resistance value of the braking resistance = the square of the operating voltage value of the braking element Braking torque - 20% of the rated torque of the motor, the speed of the motor before braking, In the working process of the braking unit, the voltage of the DC bus depends on the constant RC, r is the resistance value of the braking resistor, and c is the internal inverterElectrolytic capacitorscapacity. Here, the operating voltage value of the braking unit is generally 710V.

The working principle of the inverter braking resistor:

When servo motor.

When braking, the servo motor is in the state of power generation. This means that the energy is returned to the servo drive.

on the DC bus. Because the DC bus contains capacitors, the DC bus voltage rises.

The amount of voltage increase depends on the kinetic energy of the motor at the start of braking and the capacity of the capacitors on the DC bus. If the braking kinetic energy is greater than the capacitance on the DC bus.

At the same time, there is no other driver on the DC bus to accommodate the energy, so the driver will carefully consume the energy through the braking resistor, or feed it back to the power supply.

Please use 40 ohms braking resistor for 15kw motor inverter. 1. Resistance specification calculation (100% overload factor) assuming that the resistance power is q, then q = p * k * kc * s (unit: kilowatts) assuming that the resistance value is r, then r = v * v 1000 * p * k ) Hu lead hidden orange unit:

ohms) 2, resistance specifications near pants as if to calculate (380V AC system, 100% overload factor) resistance value: r = 700 p (unit: ohms) resistance power:

q = p * kc (in kilowatts).

Summary. What is the braking resistance of the 15kw motor inverter? Hello dear! Please ask the 15kw motor inverter to choose 40 ohm braking resistor, I hope to help you!

What is the braking resistance of the 15kw motor inverter? Dear, you are peerless! Please ask the 15kw motor frequency conversion uplift using 40 ohm braking resistor, I hope to help Chahong to help you!

40 euros. Dear, I'm sorry! Can you describe your problem in detail? Or another question. Convenient and more accurate answers for you!

How many watts. Hello dear! In a 220-volt circuit, the power is 1210 watts at a resistance of 40 ohms.

Summary. 3kw inverter with how big brake resistor with ohms.

3kw inverter with how big brake resistor with ohms.

Can it be matched with 800w?

This 500 is not small.

The power is selected according to the size of the braking energy, if you need to discharge for a long time, you can use 3kw, if you need to brake for a short time, you can only configure a few hundred watts.

See what you need. Ask about custom messages].

3kw inverter with how big brake braking car resistor hello, the brake of the inverter has a requirement for braking resistance, the braking resistance can not be less than the minimum value of the brake resistance, it is not easy to be too big, too large and slow discharge, easy to discharge the inverter overvoltage. The power is selected according to the size of the braking energy, such as Wu Yinguo needs to discharge for a long time can be fully equipped with 3kw, if short-term braking can only be equipped with a few hundred watts. I hope I can help you!

If my answer to the cavity rolling hall is helpful to you, please also give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, your support is also the driving force for my progress, and finally I wish you good health and a happy mood!