Inverters and soft starters are basically closely related. Their relationship is like that of chickens and duck eggs. In some aspects, they have similarities, but they also have their own differences. That is why the two can exist independently in the electrical equipment field for so many years.
The soft start device is a motor control system that combines intelligent protection such as soft start, soft stop, load energy saving, etc. It can effectively ensure that the motor can start stably without being affected during the entire starting process. Various parameters during the starting process, such as current limit and start time, can be adjusted according to the load characteristics of the motor.
The frequency converter uses the inverter principle and electronic information technology to control the power output control system of the communication motor according to the frequency change of the switching power supply.
What is the difference between them?
1. Frequency:
The output frequency of the soft starter is fixed to the power supply frequency and cannot be adjusted; while the output frequency of the frequency converter is adjustable.
2. Operating voltage:
The motor soft starter controls the output voltage by controlling the conduction angle of the thyristor (or other power electronic components), and its output voltage increases slowly from 0V to the rated current; the operating voltage of the frequency converter is adjustable.
3. Motor speed:
The motor soft starter cannot adjust the motor speed; the frequency converter can adjust the motor to run at any speed.
