First, the selection of inverter power
The system power is equal to the product of the inverter power and the motor power, and the system power is higher only when both are operating at a higher power. From the perspective of power, when selecting the power of the inverter, we should pay attention to the following points:
1) The power value of the inverter is the most suitable for the power value of the motor, so as to facilitate the operation of the inverter under high power value.
2) If the power classification of the inverter is not in phase with the power classification of the motor, the power of the inverter should be as close as possible to the power of the motor, but it should be slightly greater than the power of the motor.
3) When the motor is frequently started and braked or is in heavy load starting and frequent operation, a larger inverter can be selected to use the inverter for long-term and safe operation.
4) After testing, the actual power of the motor does have a surplus, and the inverter with a power less than the power of the motor can be considered, but it is necessary to pay attention to whether the instantaneous peak current will form an overcurrent maintenance action.
5) When the power of the inverter and the motor are not together, it is necessary to adjust the setting of the energy-saving program accordingly to achieve a higher energy-saving effect.
Second, the selection of the inverter box structure
The box structure of the inverter should be adapted to the environmental conditions, that is, it is necessary to consider factors such as temperature, humidity, dust, pH, and corrosive gases. There are several common types of structures that users can choose from:
1) The open IPOO type has no chassis by itself, and is suitable for the screen, plate and rack installed in the electric control box or electrical room, especially when multiple inverters are used in a centralized manner, this type is better to choose, but the environmental conditions are higher;
2) Closed IP20 type is suitable for general use, and can have a small amount of dust or a small amount of temperature and humidity;
3) Sealed IP45 type, suitable for poor industrial site conditions;
4) Closed IP65 type is suitable for occasions with poor environmental conditions, water, dust and corrosive gases.
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Indicator of Reynolds inverter cabinet wiring
Voltage level: The voltage level should match the voltage level of the power supply and motor to ensure electrical safety and normal operation of the equipment.
Current level: The current level should match the rated current of the motor to ensure electrical safety and normal operation of the equipment.
Cable Specification: Cable ...
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The difference between overload and overheating of the inverter – Reynolds
The inverter is an electric control equipment that uses frequency conversion technology and microelectronic technology to control and communicate the motor by changing the power supply frequency of the motor operation. The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to communication), braking unit, drive unit, detection unit ...
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AC servo motor with inverter control method - Reynolds
Because the inverter and servo are different in performance and function, and the use is not very different, it is not possible:
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Safety precautions for low-voltage soft lift - Reynolds
Precautions for low-voltage soft starters
For cooling purposes, the soft starter must be installed in a straight direction.
In order to ensure excellent heat dissipation, there should be room for the soft starter device.
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The inverter cannot adjust the frequency solution - Reynolds
1. The acceleration moment is too short.
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2.The V/F ratio is too large
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Reynolds soft starter problem solving
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Characteristics of isolation transformer at the input end of AC power supply - Reynolds
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Parameter setting of acceleration and deceleration time of Reynolds universal inverter
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"RNB6000 frequency conversion governor" was included in the National Torch Program
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E.bC
Reynolds inverter fault phenomenon/type:
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Precautions for low-temperature operation of VFD
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Applicable mode of inverter maintenance - Reynolds inverter
CNC cutting machine
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