How to adjust the inverter acceleration and deceleration? Fault factors and solutions of inverter for straightening machine

How to adjust the inverter acceleration and deceleration

The acceleration and deceleration control of the inverter is the key to adjusting the motor speed. The following are some common adjustment methods:

Adjust the acceleration time: The acceleration time is the time required for the inverter to accelerate the motor from a stationary state to the rated speed. When the acceleration time is short, the motor speed changes quickly, but a larger starting current is generated; when the acceleration time is long, the motor speed changes slowly, but the starting current is small. The acceleration time can be adjusted according to the actual situation to achieve the appropriate motor speed and starting current.

Adjust the deceleration time: The deceleration time is the time required for the inverter to decelerate the motor from the rated speed to a stationary state. When the deceleration time is short, the motor speed changes quickly, but a larger reverse electromotive force is generated; when the deceleration time is long, the motor speed changes slowly, but the reverse electromotive force is small. The deceleration time can be adjusted according to the actual situation to achieve the appropriate motor speed and reverse electromotive force.

Adjust the S curve: The S curve is a way of inverter acceleration and deceleration control, which can make the motor speed change more stable and reduce motor vibration and noise. By adjusting the slope and curvature of the S curve, it can adapt to different load and speed requirements.

Adjust PID parameters: PID control is a feedback-based control method. By adjusting PID parameters, the response speed and control accuracy of the inverter can be improved. Among them, proportional gain, integral time and differential time are key parameters that affect the PID control effect and need to be adjusted according to actual conditions.

It should be noted that when adjusting the acceleration and deceleration control, multiple factors such as load characteristics, inverter settings and motor characteristics should be considered, and real-time monitoring and debugging should be carried out to ensure the safe and stable operation of the motor. At the same time, when using the inverter, the operating procedures and maintenance requirements should also be followed to extend the life of the equipment and avoid unexpected failures.

Fault factors and solutions of inverter of straightening machine

The causes of DC inverter failure are relatively complex. Common failure factors include:

Power supply problem: Unstable or too high or too low power supply voltage will affect the normal operation of the inverter and even cause failure.

Solution: You can solve the power problem by installing a power stabilizer or optimizing the power voltage environment.

Motor problems: Motor damage, winding short circuit, bearing failure, etc. will affect the inverter.

Solution: The motor needs to be repaired or the damaged parts need to be replaced.

Internal faults of the inverter: For example, aging of capacitors, poor heat dissipation, damage to circuit boards, etc. can cause internal faults of the inverter.

Solution: Replacement or repair is required.

Control signal problem: The control signal received by the inverter is incorrect, such as unstable sensor signal, control line failure, etc.

Solution: You need to check the control signal source, repair or replace the sensor, and check the control circuit.

Environmental issues: Harsh environments such as high temperature, high humidity, and dust can cause inverter failure.

Solution: You can improve the environment by installing a radiator on the inverter, cleaning the inverter regularly, replacing the dust filter, etc.

When performing fault diagnosis and repair, you need to have certain electrical and electronic knowledge and follow the corresponding operating procedures and safety requirements. If you are not sure about the cause of the fault or do not have the ability to repair it, it is recommended to seek professional technical support or service.