How to calculate the braking resistance of the inverter? The motor is 5 5KW and the inverter is ABB

It depends on what you do with the braking resistor, whether it is used as a rapid shutdown of a large inertia device, or as a brake for the falling energy consumption of the potential energy load of the crane, the braking unit and braking resistor selected for different applications vary greatly. The data given in the ABB hardware manual requires a lot of basic data to be calculated. It is best to consult ABB technical support (there is a service on ABB).

Look at the hardware manual. The corresponding inverter has a corresponding braking resistance value behind it.

You can at least give a specific inverter model, and others can help you check!

According to the information you provide, the braking resistor that needs to be configured is aluminum shell resistor bar-800w-130rj or corrugated resistor bwr-800w-130rj, more details "Bobang Electric", they are a professional manufacturer of braking resistors and braking units, you can consult them!

There are many ways to calculate braking resistance, from an engineering point of view, it is not very practical to accurately calculate the resistance value and power of braking resistance in the actual application process, mainly because some parameters cannot be accurately measured. At present, the method commonly used is the estimation method, and the calculation results are not very consistent because the calculation method of each manufacturer is different.

Introduction of braking resistors.

The braking resistor is a carrier used to consume the regenerative energy of the motor in the form of thermal energy, which includes two important parameters: resistance value and power capacity. There are usually two types of corrugated resistors and aluminum alloy resistors that are used in engineering: the corrugated resistors are made of vertical corrugations on the surface, which is conducive to heat dissipation and reduce parasitic inductance, and a highly flame-retardant inorganic coating is used to effectively protect the resistance wires from aging and prolong the service life. The aluminum alloy resistor is easy to install tightly, easy to attach radiators, beautiful appearance, and the aluminum alloy outer box with high heat dissipation is fully encapsulated, which has strong vibration resistance, weather resistance and long-term stability; Small size, large power, easy and stable installation, beautiful appearance, widely used in highly harsh industrial environments.

Resistance and power calculations for braking resistors.

The brake utilization rate ed%, that is, the brake utilization rate ed% in Delta's manual. The brake utilization rate ed% is defined as the deceleration time t1 divided by the deceleration period t2, and the braking brake utilization rate is mainly to allow the braking unit and the braking resistor to have sufficient time to dissipate the heat generated by braking; When the braking resistance is heated, the resistance value will increase as the temperature rises, and the braking torque will also decrease. Brake usage rate ed% = braking time braking cycle = t1 t2 * 100%.

The braking resistance of the inverter is used in the occasion where the deceleration time of the inverter is very short and the load inertia is relatively large.

When the inverter is stopped, the load dragged by the motor cannot be stopped in time due to inertia, at this time, the motor will become a generator, and the energy generated will be applied to the inverter module of the inverter, which will cause damage or damage to the module of the inverter.

The braking resistance of the inverter is used to consume the energy generated by the motor at this time to achieve the purpose of protecting the inverter module of the inverter.

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.

Summary. How to calculate how much braking resistance is needed for the inverter???

Hello dear, the instantaneous power consumed by the braking resistor is calculated according to the following formula: p instantaneous = 7002 r

The braking resistor power value calculated according to the above formula is the power value that the braking resistor can dissipate if it can work uninterruptedly for a long time, but the braking resistor is not uninterrupted work, and there is a great waste in this selection, in this product, the utilization rate of the braking resistor can be selected, and it stipulates the short-time working ratio of the braking resistor. The actual power consumed by the braking resistor is calculated as follows:

How to calculate how much braking resistance is needed for the inverter??? How thick is the line of braking resistor reasonable? Thank you!!

How to calculate how much braking resistance is needed for the inverter??? Hello dear, the instantaneous power consumed by the braking resistor is calculated according to the following formula: p instantaneous = 7002 r The braking resistor power value calculated according to the above formula is the power value that the braking resistor can dissipate when it can work uninterrupted for a long time, but the braking resistor is not uninterrupted work, there is a great waste in this selection, in this product, the utilization rate of the braking resistor can be selected, which stipulates the short-term working ratio of the braking resistor.

The actual power consumption of the braking resistor is calculated as follows: p = 7002 r rb%rb%: braking resistor usage.

How thick is the line of braking resistor reasonable? Hello dear, about wiring, the braking resistor below 1kw is suitable for square multi-strand wire. 1kw 4kw is 4 square meters or more than 4kw (conjoined resistor, resistance cabinet) is 6 square or larger.

Hope it helps. If my answer is helpful to you, please give a thumbs up (in the lower left corner), I look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress. Finally, I wish you good health and a good mood!

1. Calculation of braking resistance.

Selection of braking resistor: operating voltage 710V. Resistance power (kW) = kW of motor * (10%--50%), braking resistance value (ohms).

Rough algorithm: r=u 2i u i In China, the DC loop voltage is calculated as follows: u=380*

Wherein, r: resistance value, u: dc bus discharge voltage, i: motor rated current.

2. The principle of inverter braking resistance:

When the servo motor is braking, the servo motor is in the state of power generation. This means that the energy is returned to the DC bus of the servo drive. 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, and there is no other driver on the DC bus to accommodate the energy, the drive will either dissipate the energy through the braking resistor or feed it back to the power supply.

Dear, hello, I am happy to answer your questions, the answer to the question: ABB inverter braking resistance setting parameters: 1, group99 parameters:

The application macro selects the standard macro, and the motor rating is modified according to the motor name brand data. 2. group10 parameter: check whether parameter 1001 is 1, not modified to 1.

3. group11 parameter: check whether parameter 1102 is 0, not modified to 0. Check whether parameter 1103 is 2 and not modified to 2.

4. group13 parameter: check whether parameter 1304 is 20%, not modified to 20%. Check whether parameter 1305 is 100% and not modified to 100%.

5. Group15 parameter: check whether parameter 1510 is 4ma, not modified to 4ma. Check that parameter 1511 is 20mA, not modified to 20mA.

The value of the check parameter 15 is the value of display 0103, that is, the output frequency. 6. group20 parameter: check whether the parameter 2007 is 20Hz, not modified to 20Hz.

Check whether the parameter 2008 is 50Hz, not modified to 50Hz. Hope the answer can help you and have a great day!

Dear and hello, ABB inverter ACS510 static inverter circuit resistance is 10 ohms. The static inverter circuit is an important part of the shape transformation of the output current of the inverter. In the ABB ACS510 frequency converter, the resistance of the static inverter circuit is 10 ohms.

The value of the virtual resistance is accurately calculated and verified by experiments, which can ensure the normal and stable output current of the inverter and avoid interference with other circuits. In addition to the resistance value of the static inverter circuit, there are some other factors that will also affect the stability and quality of the output power of the inverter. For example, the output filter circuit of the frequency converter, the winding material and design, the output cable, etc., all have an impact on the current shape and electromagnetic interference.

Therefore, when selecting and using frequency converters, these factors need to be comprehensively considered, and adjusted and optimized according to actual needs. I hope mine can help you