What is the soft start mode of diesel generator set motor? The soft starter in series between the power supply and the controlled motor is used to control the conduction angle of the internal thyristor, so as to gradually increase the input voltage of the motor from zero to the end of starting, and give the full voltage of the motor, that is, soft starting. In the process of soft starting, the starting torque and speed of the motor gradually increase. Soft start generally has the following starting modes.

柴油发电机组启动方式如下：

The starting mode of diesel generator set is as follows:

(1)柴油发电机组斜坡升压软起动：这种起动方式简单，没有电流闭环控制，只调节晶闸管的导通角，使其与时间有一定的功能关系。缺点是由于电流不受限制，在电机起动过程中，有时需要产生大的脉冲电流来损坏晶闸管，对电网有很大的影响，在实际中很少使用。

(1) Diesel generator set ramp boost soft start: this starting method is simple, there is no current closed-loop control, only adjust the conduction angle of the thyristor, so that it has a certain functional relationship with time. The disadvantage is that due to the unlimited current, it is sometimes necessary to generate large pulse current to damage the thyristor during the motor starting process, which has a great impact on the power grid and is rarely used in practice.

(2)柴油发电机组斜坡恒流软起动：这种起动方式在电动机起动初期逐渐增加，当电流达到预定值时保持不变，直到起动完成为止。在起动过程中，电流上升和变化的速度可以根据电机负荷来调节和设定。

(2) Diesel generator set ramp constant current soft start: this starting method gradually increases in the initial stage of motor start, and remains unchanged when the current reaches the predetermined value until the start is completed. During the starting process, the speed of current rise and change can be adjusted and set according to the motor load.

如果电流上升速率大，起动转矩大，起动时间短，这种起动方式是使用广泛的起动方式，尤其适用于风扇和泵负荷起动。

If the current rise rate is large, the starting torque is large, and the starting time is short, this starting method is widely used, especially for fan and pump load starting.

(3)柴油发电机组步启动：启动，即在短时间内，起动电流可以快速到达设定值，即步进起动。通过调整起动电流的设定值，可以达到快速启动的效果。

(3) Step start of diesel generator set: start, that is, in a short time, the starting current can quickly reach the set value, that is, step start. By adjusting the set value of starting current, the effect of fast starting can be achieved.

(4)柴油发电机组脉冲冲击起动：在起动阶段，晶闸管可开启一段很短的时间，过一段时间后，在较大电流下回落，然后根据原设定值线性上升，以恒流起动。这种起动方式在一般负载中使用较少，适用于重负荷，需要克服较大的静态摩擦。

(4) Pulse impulse starting of diesel generator set: in the starting stage, the thyristor can be opened for a very short time. After a period of time, it will fall back under large current, and then rise linearly according to the original set value to start with constant current. This starting method is less used in general loads, suitable for heavy loads, and needs to overcome large static friction.

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