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.

柴油發(fā)電機(jī)組啟動(dòng)方式如下：

The starting mode of diesel generator set is as follows:

(1)柴油發(fā)電機(jī)組斜坡升壓軟起動(dòng)：這種起動(dòng)方式簡(jiǎn)單，沒有電流閉環(huán)控制，只調(diào)節(jié)晶閘管的導(dǎo)通角，使其與時(shí)間有一定的功能關(guān)系。缺點(diǎn)是由于電流不受限制，在電機(jī)起動(dòng)過程中，有時(shí)需要產(chǎn)生大的脈沖電流來損壞晶閘管，對(duì)電網(wǎng)有很大的影響，在實(shí)際中很少使用。

(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)柴油發(fā)電機(jī)組斜坡恒流軟起動(dòng)：這種起動(dòng)方式在電動(dòng)機(jī)起動(dòng)初期逐漸增加，當(dāng)電流達(dá)到預(yù)定值時(shí)保持不變，直到起動(dòng)完成為止。在起動(dòng)過程中，電流上升和變化的速度可以根據(jù)電機(jī)負(fù)荷來調(diào)節(jié)和設(shè)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.

如果電流上升速率大，起動(dòng)轉(zhuǎn)矩大，起動(dòng)時(shí)間短，這種起動(dòng)方式是使用廣泛的起動(dòng)方式，尤其適用于風(fēng)扇和泵負(fù)荷起動(dòng)。

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)柴油發(fā)電機(jī)組步啟動(dòng)：?jiǎn)?dòng)，即在短時(shí)間內(nèi)，起動(dòng)電流可以快速到達(dá)設(shè)定值，即步進(jìn)起動(dòng)。通過調(diào)整起動(dòng)電流的設(shè)定值，可以達(dá)到快速啟動(dòng)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)柴油發(fā)電機(jī)組脈沖沖擊起動(dòng)：在起動(dòng)階段，晶閘管可開啟一段很短的時(shí)間，過一段時(shí)間后，在較大電流下回落，然后根據(jù)原設(shè)定值線性上升，以恒流起動(dòng)。這種起動(dòng)方式在一般負(fù)載中使用較少，適用于重負(fù)荷，需要克服較大的靜態(tài)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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