Inverter brand: There are many inverter setting parameters, and each parameter has a certain selection range. During use, the inverter cannot work properly due to improper setting of individual parameters. Therefore, inverter debugging starts with correctly setting the inverter parameters. Relevant inverter brands have summarized 7 basic inverter parameter setting methods for your reference. Let's learn about them together.

1. Control Mode

That is, speed control, torque control, PID control or other methods. After the control method is adopted, static or dynamic identification should be performed according to the control accuracy.

2. Operating frequency

The inverter brand said that when the motor runs at low speed, the heat dissipation performance is very poor. If the motor runs at low speed for a long time, the motor will be burned. In addition, at low speed, the current in the cable will also increase, which will also cause the cable to heat up.

3. Maximum operating frequency

The maximum frequency of a general frequency converter is 60Hz, and some even 400Hz. High frequency will make the motor run at high speed. For ordinary motors, their bearings cannot run at a speed exceeding the rated speed for a long time. Can the motor rotor withstand this centrifugal force?

4. Carrier frequency

The inverter brand said that the higher the inverter carrier frequency is set, the greater the high-order harmonic components, which is closely related to factors such as cable length, motor heating, cable heating, and inverter heating.

5. Motor parameters

The inverter sets the motor's power, current, voltage, speed and maximum frequency in the parameters, which can be obtained directly from the motor nameplate.

6. Frequency Hopping

Resonance may occur at a certain frequency point, especially when the entire device is relatively high; when controlling the compressor, avoid the surge point of the compressor.

7. Acceleration and deceleration times

The inverter brand states that the acceleration time is the time required for the output frequency to rise from 0 to a higher frequency, and the deceleration time is the time required for the output frequency to fall from a higher frequency to 0. The acceleration and deceleration times are usually determined by the rise and fall of the frequency setting signal. When the motor is accelerating, the frequency setting rise rate must be limited to prevent overcurrent, and when the motor is decelerating, the fall rate must be limited to prevent overvoltage.

Requirements for setting the acceleration time: limit the acceleration current to below the inverter overcurrent capacity to avoid the inverter tripping due to overcurrent stall; the key to setting the deceleration time is to prevent the smoothing circuit voltage from being too high, causing the inverter to trip due to regenerative overvoltage stall. The acceleration and deceleration times can be calculated based on the load, but during debugging, longer acceleration and deceleration times are usually set based on the load and experience, and the motor is started and stopped to observe whether there are overcurrent and overvoltage alarms; then, the acceleration and deceleration setting time is gradually shortened. Based on the principle of no alarm during operation, repeat the operation several times to determine the optimal acceleration and deceleration time.