How to switch between torque and speed control modes of frequency converter?
Publish Time: 2025-03-13
In industrial production, frequency converter, as an important power electronic device, is widely used in speed regulation and control of motors. In order to meet the needs under different working conditions, frequency converter usually has two working modes: torque control mode and speed control mode. These two modes have their own characteristics, and users can switch according to actual needs. This article will discuss in detail how to switch between torque and speed control modes of frequency converter.First, we need to understand the basic principles of torque control mode and speed control mode. Torque control mode is mainly used in occasions where the output torque of the motor needs to be accurately controlled, such as lifting, tension control, etc. In torque control mode, the frequency converter controls the output torque of the motor according to the set torque value, rather than directly controlling the speed of the motor. On the contrary, speed control mode is mainly used in occasions where the motor speed needs to be accurately controlled, such as fans, pumps, etc. In speed control mode, the frequency converter controls the speed of the motor according to the set speed value.Generally speaking, there are two main switching modes of frequency converter: automatic switching and manual switching.Automatic switching usually relies on the built-in logic and sensors of the frequency converter. When the frequency converter detects a change in load or working conditions, it will automatically judge and switch to a more appropriate control mode. For example, during the transition process of starting or stopping some loads, it may be necessary to switch to torque control mode first to ensure smooth start or stop, and then switch to speed control mode to maintain a stable speed. This automatic switching method requires the frequency converter to have a high level of intelligence and accurate detection capabilities.However, in actual applications, we need to manually switch modes more often. Manual switching is usually achieved through the control panel, external controller or programming interface of the frequency converter. Users can switch control modes by inputting corresponding control signals or parameters according to actual needs.During manual switching, you first need to enter the parameter setting interface of the frequency converter. The parameter setting interface of frequency converters of different brands and models may be different, but there is usually a special option for selecting the control mode. Users need to find this option and set it to the desired torque control mode or speed control mode.After completing the mode setting, the corresponding parameters need to be adjusted. For example, in torque control mode, users need to set parameters such as torque set value, torque rise time, torque fall time, etc.; while in speed control mode, they need to set parameters such as speed set value, acceleration time, deceleration time, etc. Adjusting these parameters is essential to ensure the smooth operation and efficient operation of the motor.In addition, when switching modes, some safety precautions need to be taken. For example, the motor should be stopped before switching to avoid motor damage or safety accidents caused by improper mode switching. At the same time, the operating status and parameter changes of the motor should be closely monitored during the switching process so as to promptly detect and deal with possible problems.In short, the user needs to have certain professional knowledge and operating skills to switch the frequency converter between torque and speed control modes. By setting parameters reasonably and paying attention to safety precautions, the user can easily switch between the two modes to meet the needs of different working conditions.
