Zibo Chuangyin Energy Saving Technology Co

The soft start control cabinet connected in series between the power supply and the controlled motor is used to control the conduction angle of its internal thyristor, so that the motor input voltage gradually increases from zero according to a preset functional relationship until the start is completed, and the motor is given full voltage, that is, It is a soft start, so what is its starting method? Let’s find out below
Soft start control cabinet ramp boost soft start. This startup method is the simplest. It does not have current closed-loop control and only adjusts the thyristor conduction angle. Make it increase as a certain function of time.
, Ramp constant current soft start This starting method is to gradually increase the starting current in the initial stage of starting the motor. When the current reaches the preset value, it remains constant until the starting is completed. During the starting process, the rate of current rise and change can be adjusted and set according to the motor load. If the current rise rate is large, the starting torque will be large and the starting time will be short. This starting method is the most commonly used starting method, especially suitable for starting fans and pumps.
, step start startup, that is, making the starting current quickly reach the set value in the shortest time, which is called step start. By adjusting the starting current setting value, a quick starting effect can be achieved.
. Pulse impact startup: At the beginning of startup, the thyristor is allowed to conduct with a larger current for a period of time, then falls back, and then rises linearly according to the original setting value, and is connected to constant current startup. This starting method is rarely used in general loads and is suitable for starting situations with heavy loads and large static friction that need to be overcome. The traditional decompression starting methods of cage motors include start-up, auto-decompression start, reactor start, etc. These starting methods are all staged pressure reduction starts.
I believe that after everyone understands the startup method of the soft start control cabinet, it will be more helpful to us in future use. This is the introduction to the above knowledge.