The cause of bearing noise in different situations of frequency converters - Reynolds

1 Main circuit wiring (1) Reynolds inverter three-phase AC input terminal (R, S, T) The power input terminal is connected to the three-phase AC power supply through the circuit breaker of the circuit breaker for line protection, regardless of the connection phase sequence. It should be noted here that the three-phase AC power supply is not ...

International electrical safety standards: The requirements are in line with international electrical safety standards, such as CE standards in Europe and UL specifications in United States. These specifications specify the requirements for electrical safety functions, mechanical safety functions, EMC functions, etc. ...

A brief introduction to the progress of the inverter in terms of torque: This function adds the output voltage of the inverter so that the output torque of the motor is proportional to the square of the voltage, so as to improve the output torque of the motor. Improve the skill of insufficient torque at low speed output of the motor, and use the "vector manipulation" ...

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1. 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 actively adjusts the speed of the pump and the number of pumps according to the set pressure, so that the equipment can run in ...

Reynolds inverter RNB1000 series E.oC3 constant speed operation overcurrent fault solution Reynolds inverter fault codes: E.oC3 Reynolds inverter fault phenomenon/type: Constant speed operation overcurrent Possible causes of Reynolds inverter failure: ...

(1) The multi-pronged PWM control method is selected, and the output voltage waveform is close to the sine wave. (2) The rectifier circuit is multiplied, the number of pulses is as high as 36, the power factor is high, and the input harmonic is small. (3) Modular design, compact structure ...

(1) Inverter three-phase communication input terminal (R, S, T) The power input terminal is connected to the three-phase communication power supply through the circuit breaker of the circuit breaker for line protection, regardless of the connection phase sequence. It should be noted here that the three-phase communication power supply must not be directly connected to the inverter output ...

A frequency converter is a power electronic device that can change the frequency of an AC power source to control the speed and output power of a motor. Inverters are widely used in industry, aviation, metallurgy, petroleum, chemical industry, electric power and other fields.

1) Query and query fault phenomena. The fault phenomenon of the inverter is varied, for example, the same type of problem may have different problem phenomena, and different types of problems may have the same kind of problem, which brings difficulties to find the problem. However, the problem phenomenon is the fundamental basis for repairing the inverter ...

1. VFD should be operated in an environment above minus 10°C as much as possible, and it is best to operate indoors. 2. When the VFD is started and stopped, try to start and stop with the VFD itself, do not close the power supply, and keep your VFD in a power-on state. 3. Give VFD l ...

In the repair of the inverter, we often hear about overpressure problems, but underpressure problems are also common problems encountered in the use of inverters. The reason is that the main circuit voltage is lower than the lower limit caused by the maintenance action or the damage of a rectifier bridge or the instantaneous power failure of the power grid, and the input is flat. Inverter after-sales ...

Reynolds JJR5000 series all-digital intelligent AC motor soft starter adopts power electronics technology, microprocessor technology and modern control theory technology, which is a new type of starting equipment at the current level. This product can limit the starting current of the asynchronous motor when it starts, and is widely used in fans, ...

The inverter is composed of many electronic parts, such as semiconductor components, etc., in the application and protection involves the replacement of a related component, because of the composition or physical characteristics of the inverter, it will deteriorate in a certain period of time, which will reduce the characteristics of the inverter, and even ...

One. Safety Precautions 1. First of all, it is necessary to have certain electrical professional knowledge, and understand the job site, understand the equipment status, and have certain electrical operation technology. 2. Determine the voltage level of the equipment (such as low-voltage AC380V) and whether it is low-voltage ...

The voltage waveform output by the inverter is only similar to a sine wave, but not a real sine wave, and its waveform contains a large number of harmonic components. As we all know, the higher harmonics will increase the output current of the inverter, causing the motor winding to heat up.

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, ...

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 = ...

1. The output of the inverter for overvoltage maintenance has the function of voltage detection, and the inverter can actively adjust the output voltage, so that the motor does not bear the overvoltage, and the motor runs within the set voltage range. 2. Undervoltage maintenanceWhen the voltage of the motor is lower than 90% of the normal voltage (some are set to 85% ...

Bypass cabinet: The cabinet is equipped with high-voltage inlet and outlet isolation switches QS1 and QS2, as shown in Figure 2. 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 observe the live display and electromagnetic lock status to ensure that the ...