Safety standards for AC drives – Reynolds

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 ...

1. The switching signal of PLC controls the inverter The PLC can control the start, stop and reset of the inverter through the program; It can also control different combinations of high-speed, medium-speed and low-speed terminals of the inverter to achieve multi-stage speed operation. However, because it is controlled by switching ...

The use of Reynolds inverters in industrial production is very important, in addition to speed regulation, soft start effect, the important thing is to be able to save energy. There are many functional parameters of Reynolds inverter, and there are generally dozens or even hundreds of parameters for users to choose. In practice, it is not necessary to ...

1. Pole change logarithmic speed regulation method This speed regulation method is to change the number of stator poles of the cage motor by changing the connection method of the stator winding, so as to reach the intention of speed regulation; The wiring is simple, the control is convenient, and the price is low; It can be used in conjunction with pressure and speed regulation, electromagnetic slip clutch to obtain high efficiency ...

According to the different degrees of short circuit, the inverter can display the short circuit of the SCF1 motor; SCF2 has an impedance short circuit; SCF3 is short-circuited to ground. Causes of the problem: insulation problems with the cable from the motor or inverter to the motor; current transformer fault; ...

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, ...

a. Output frequency scale. The output frequency scale that can be controlled by the general inverter, the lowest starting frequency is generally 0.1Hz, and the highest frequency is different according to the functional indicators of the inverter, generally 400Hz, and some models are 650Hz. No matter how high the output frequency is, it depends on the scale of the high-frequency inverter. ...

With the rapid development of China's national economy, the supply and demand situation of oil and gas resources is becoming increasingly severe, and the import of oil and gas is increasing year by year, so it is urgent to expand the field of domestic oil and gas exploration and development. Strengthening the exploration and development of shale gas resources can make up for the lack of conventional oil and gas resources and promote the sustainability of the oil and gas industry.

Starting performance is a very important performance parameter of motor products. The large starting current of the motor is an unpreventable problem in the process of direct starting. The high current during the engine process has a great impact on both the power grid and the motor itself. Therefore, according to different working conditions and different series of motors, ...

Motor overload: There is no need to set overload maintenance parameters in frequency conversion. The inverter generally acquiesces to the motor overload maintenance based on the motor power. Generally, it is 1.2 times and 60 seconds will report an overload failure. The overload factor is not the same for different frequency converters. ...

1. If the bearing is in good continuous rotation condition, it will emit a low whining or humming sound. Sharp hissing, squeaking and other irregular sounds often indicate that the bearing is in a bad continuous rotation condition. The sharp squeaky noise can be due to the formation of an inappropriately smooth ...

JJR1000系列： 　　JJR1011；JJR1017；JJR1022；JJR1030；JJR1037；JJR1045；JJR1055；JJR1075；JJR1090；JJR1115；JJR1132；JJR1160；JJR1200；JJR1250；JJR1320；JJR1400；JJR1500；JJR1600 ...

1. Problems of the inverter and the motor itself; After the motor has been used for a long time, it cannot be ruled out that the insulation function is not good, or the bearing is stuck, and it may show a large current and heat. The coupling between the motor and the load may also be worn, or the motor is unbalanced in three phases, and the fixtures of the motor are loose.

1. Energy consumption braking: The energy consumption braking method uses the braking resistance set in the DC circuit to absorb the regenerative electric energy of the motor through the chopper and braking resistor, so as to realize the rapid braking of the inverter. 2. Feedback braking: feedback system ...

1) The air duct of the inverter cabinet should be planned reasonably, and the exhaust should be clear and smooth, so as to avoid the formation of vortex in the cabinet and the accumulation of dust in a fixed direction. 2) The top air outlet of the inverter cabinet should be equipped with a protective top cover to avoid debris from falling directly.

In ancient times, there were ten major tortures, which made people unable to survive and die, and experienced the purgatory of the world; Today, there are ten "tortures" of inverters, and the same can make your inverters suffer. Let's follow the editor to find out which of the top ten "tortures" will make your inverter "worse than dead"! ...

In May 2020, Reynolds was recommended by relevant departments to apply for the Ministry of Water Resources's "2020 Key Promotion and Guidance Catalogue of Advanced and Practical Water Conservancy Technologies".

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 ...

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 = ...

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 ...