Below are some common inverter speed setting parameters and their explanations:
Command Source Selection: Used to select the source of the speed command, such as panel, external terminals, analog signals, etc. Users can choose the most convenient control method according to their actual needs.
Frequency source selection: This feature allows you to choose the source of the frequency, such as a fixed frequency, an external analog signal, or PID control. Users can select a suitable frequency source based on their actual needs to achieve the best control performance.
Maximum output frequency: This setting determines the maximum output frequency of the inverter, and can generally be set based on the rated frequency of the motor.
Minimum output frequency: This setting determines the minimum output frequency of the inverter, and can generally be set according to actual needs.
Acceleration time: This setting determines the time required for the motor to accelerate from a standstill to its maximum output frequency. Too short an acceleration time may cause the motor to experience overcurrent or overload.
Deceleration time: This setting determines the time required for the motor to decelerate from its maximum output frequency to a standstill. Too short a deceleration time may cause the motor to stall or experience overvoltage.
Electronic gear ratio: Used to set the ratio between the motor speed and the inverter output frequency. By adjusting the electronic gear ratio, precise speed control can be achieved.
Speed mode selection: Used to select the speed control mode, such as linear mode, square mode, or sensorless mode. Users can choose the most suitable speed mode according to their actual needs.
V/f curve setting: Used to set the V/f curve to achieve optimal motor performance under different loads. Users can set it according to their actual needs.
Automatic tuning: Some frequency converters have an automatic tuning function, which can automatically identify the motor parameters and make optimal settings to improve the motor's performance and reliability.
Carrier frequency: The carrier frequency is the waveform frequency of the inverter's output voltage, which affects the motor's noise and temperature rise. A lower carrier frequency will lead to increased motor noise, while a higher carrier frequency may cause the motor to overheat. Therefore, it is necessary to select an appropriate carrier frequency based on the actual situation.
Torque compensation: Torque compensation is a function used to improve the torque output of a motor at low speeds. By adjusting the torque compensation parameters, greater torque output can be provided at low speeds, improving the motor's starting and low-speed performance.
Automatic Energy-Saving Mode: Some frequency converters have an automatic energy-saving mode, which can automatically adjust the output frequency and voltage according to the motor's operating status to achieve energy saving. By properly setting the automatic energy-saving mode, the motor's energy efficiency and operating efficiency can be improved.
Dynamic speed mode: Dynamic speed mode can dynamically adjust the motor speed according to actual needs. For example, in the process of speed change that requires a smooth transition, dynamic speed mode can avoid sudden changes in motor speed and achieve smooth speed control.
Motor parameter self-adaptation: Some frequency converters have a motor parameter self-adaptation function, which can automatically identify motor parameters and set them optimally to improve motor performance and reliability. By properly using the motor parameter self-adaptation function, more precise speed control and smooth speed regulation can be achieved.
The following principles should be followed when setting the speed of the frequency converter:
To ensure the safe operation of the motor: When setting the acceleration and deceleration times, the motor's load and mechanical characteristics should be fully considered to avoid overcurrent, overload, or damage to the motor due to improper settings.
Consider the mechanical characteristics of the motor: When setting the electronic gear ratio and speed mode, the mechanical characteristics of the motor should be fully considered to ensure that the motor can achieve precise speed control and smooth speed regulation.
To meet the requirements of the production process: When setting the maximum and minimum output frequencies, the requirements of the production process should be fully considered to ensure that the frequency converter can meet the speed control needs of the actual production process.
Maintaining stability: When setting the V/f curve and auto-tuning, the stability of the frequency converter and motor should be fully considered to avoid system instability or performance degradation due to improper settings.
In summary, properly setting the speed parameters of the frequency converter can improve the performance and reliability of the motor, achieving energy conservation, emission reduction, and safe production. In practical applications, appropriate parameters should be selected and configured reasonably according to specific needs and scenarios to obtain the best control effect.
