As an electronic electric, the inverter itself also consumes electricity (about 3-5% of the rated power). A 1.5 hp air conditioner consumes 20-30W of electricity, which is equivalent to the length of a lamp. The inverter works under the power frequency and has the function of saving electricity, which is practical. However, the conditions are:
First, it is a fan/pump load
Second, the device itself has a power-saving function (software support)
Third, endure and continue to work
The above are the three conditions that show the results of power saving. If it is said that the power frequency of the inverter is energy-saving without conditions, it is an emphasis or transaction speculation. If you know what happened, you will wonderfully manipulate it to do things for you. It is necessary to pay attention to the place of use and the conditions of use to use it accurately, otherwise it is.
The power factor makes up for the energy savings
Reactive power not only increases the line loss and the fever of the equipment, but also the reduction of the power factor leads to the reduction of the active power of the power grid.
After using the frequency conversion speed control device, because of the infection of the filter capacitor inside the frequency converter, the reactive power loss is reduced and the active power of the power grid is increased.
Soft-start energy saving
The hard start of the motor poses a severe impact on the power grid, and the requirements for the capacity of the power grid are too high, and the large current and vibration generated during the start are extremely damaging to the baffle and valve, and the service life of the equipment and pipe is extremely unlucky.
After the use of inverter energy-saving device, the soft start energy of the inverter will make the starting current start from zero, and the maximum value will not exceed the rated current, which can reduce the impact on the power grid and the requirements for power supply capacity, delay the service life of equipment and valves, and save the cost of equipment.
Theoretically, frequency converters can be used in all mechanical equipment with electric motors. When the motor is started, the current will be 5-6 times higher than the rating, which will not only affect the service life of the motor, but also consume more electricity. The speed of the motor is fixed, but in the actual use process, sometimes it is necessary to work at a lower or higher speed, so there is often a need for frequency conversion.
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Interpretation of Reynolds inverter models
Take the RNB2000 series inverter as an example.
The model number of the RNB2000 series 37kW inverter is: RNB2037-U
RN: on behalf of Reynolds;
B: low-voltage frequency conversion governor;
2: 2000 series;
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The inverter has no short-circuit protection for the reason – Reynolds
Short-circuit maintenance is a function of equipment connected between the power supply and the load, which can effectively disconnect the short-circuit point from the power supply when the load side is short-circuited. If an equipment has a short-circuit maintenance function, it must have a certain short-circuit breaking ability; And a device with the ability to break in a short circuit ...
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Precautions for multiple motors in one inverter - Reynolds
Equipment selection
1. Inverter selection. When it comes to sizing, the first thing to consider is the operating conditions – whether one or more motors should be started or stopped at any time during the operation of the inverter.
If the motor does not need to be started at any time during the operation of the inverter, it may only be stopped or ...
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Inverter acceleration and deceleration mode selection
The selection of the acceleration form and deceleration form of the inverter is also called the selection of acceleration and deceleration curves. Generally, there are several forms of inverter, such as linear, S-shaped, semi-S-shaped, etc., and the characteristics and uses of each form are as follows.
1. Linear form
The form makes the inverter ...
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Reynolds product range models
JJR1000系列：
JJR1011；JJR1017；JJR1022；JJR1030；JJR1037；JJR1045；JJR1055；JJR1075；JJR1090；JJR1115；JJR1132；JJR1160；JJR1200；JJR1250；JJR1 ...
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The reason for the large fluctuation of harmonic parameters in the harmonic test of the output harmonic test of the inverter
In order to measure stable harmonics, it is necessary to meet the following two conditions:
At the top of the list, the signal is a stable periodic signal.
Second, it is necessary to perform harmonic analysis according to the integer multiple of the period of the stable periodic signal.
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Replacement of spare parts for frequency converters – Reynolds
In order for a VFD to operate reliably for a long time, it is necessary to repair the electronic components in the VFD on a regular basis and replace the primary components of the VFD according to the service life.
1. Cooling fan
The VFD power module is the most heat-generating device, and its ...
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The external configuration of the inverter is solved - Reynolds
With the improvement of the degree of automation of packaging machinery, packaging machine inverter (hereinafter referred to as VFD) plays an increasingly important role in packaging machinery. Capsule filling machine, high-speed tablet press, bottling production line, aluminum-plastic packaging machine, cartoning machine, each equipment will use VFD, mainly ...
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Operating procedures for Reynolds frequency converters
Bypass cabinet: The cabinet is equipped with high-voltage inlet and outlet isolation switches QS1 and QS2. Among them, QS1 is a single-pole single-throw variable frequency incoming knife switch, and QS2 is a single-pole double-throw power frequency and variable frequency outgoing knife switch. The bypass cabinet is a high-voltage environment, please investigate the status of the live display and electromagnetic lock to ensure safety before ...
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Common faults and solutions of vector inverter - Reynolds
The following faults may be encountered during the use of the inverter, please refer to the following methods for simple fault analysis:
1. No manifestation at power-on:
1) Use a multimeter to check whether the input power supply of the inverter is consistent with the rated voltage of the inverter, and check the cleaning problem.
2） ...
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The reason why the inverter controls the motor – Reynolds
Q1: Why should I use VFD to control the motor?
When it comes to this issue, let's take a brief look at these two devices. The motor is an inductive load that hinders the change of current, and when it is started, a large change in current is generated. VFD, which is actually made up of a rectifier inverter circuit, ...
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The reason why the inverter burns the power supply inlet end - Reynolds
1. It is necessary to consider the touch and current size of the incoming terminal, if the terminal standard is small, perhaps the conductive function of the terminal is poor, which will directly cause the current carrying capacity of the terminal to be small and heated.
2. The inlet at the end of the inlet line must be pressed well and the like, if it is not pressed, it may cause ...
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Frequency converter soft troubleshooting – Reynolds
Undervoltage is also a problem that we often encounter in application. Mainly because the voltage of the main circuit is too low (220V series is lower than 200V, 380V series is lower than 400V), the main reason: a certain way of the rectifier bridge is damaged or there is abnormal operation in the three ways of the thyristor, which may lead to the appearance of undervoltage problems, ...
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Reynolds servo motor selection steps
According to the requirements of the operating conditions, the appropriate load inertia accounting formula is selected to calculate the load inertia of the organization.
According to the load inertia and servo motor inertia, the appropriate servo motor standard is selected.
Combined with the inertia and load inertia of the primary servo motor, the acceleration torque and deceleration are calculated.
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Structural characteristics of Reynolds RHY series inverter governor
1. Advanced technology: (PC or PLC) is used to make the equipment complete the intelligent constant pressure variable supply water supply according to the requirements of water supply and fire protection;
2. High efficiency and energy saving: the system can set the pressure according to the demand, and the system can actively adjust according to the set pressure.
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Rated current analysis of inverter leakage circuit breaker
The output of the inverter is controlled by PWM (pulse width modulation, similar to high-speed switching), so a high frequency leakage current will occur, if you want to install a general leakage disconnect switch on the primary side of the inverter, it is recommended to select a sensitivity current of more than 200mA for each inverter and the action time is 0.1 seconds ...
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Calculation of the braking resistance of the inverter – Reynolds
After selecting the resistance value of the braking resistor, the power value of the braking resistor should be confirmed, and the selection of the braking resistor power is relatively cumbersome, and it is related to many factors.
The instantaneous power consumed by the braking resistor is calculated according to the following formula: P instantaneous = ...
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The abnormal installation of the inverter in the power frequency motor leads to hazards
Installing a variable-frequency drive (VFD) on the power frequency motor can complete the precise control and speed regulation of the motor, and improve the power and accuracy of the progressive motor. However, if it is not properly used and used, the following damages may occur:
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Key points for the selection of AC contactors - Reynolds
1. Select varieties according to the above series according to the purpose and requirements of use
Note that the main circuit load type is strictly differentiated, whether it is DC or communication.
The communication contactor is different from the DC contactor, and is only suitable for DC-1 to DC-5 loads when used for DC loads.
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How to determine the frequency of start-up – Reynolds
Generally, most motors start to speed up from 0Hz, but in some special cases, it is necessary to start directly from a certain frequency. At this time, the frequency output of the VFD at the moment of activation is the activation frequency. In general, you need to set the activation frequency in the following situations.
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