发电机组转换电能方式的分类有哪些？ What are the classifications of power conversion methods for generator sets?

发电机组按转换的电能方式可分为交流发电机和直流发电机两大类。交流发电机又分为同步发电机和异步发电机两种。同步发电机又分为隐极式同步发电机和凸极式同步发电机两种。现代发电站中最常用的是同步发电机，异步发电机很少用。交流发电机组又可分为单相发电机和三相发电机两种。三相发电机输出电压为380V，单相发电机输出电压为220V。

励磁方式分类：

按励磁方式可分为刷励磁发电机和无刷励磁发电机两类。有刷励磁发电机的励磁方式为他励式，无刷励磁发电机的励磁方式为自励式。他励式式发电机的整流装置是在发电机定子上，而自励磁式发电机的整流装置是在发电机组的转子上。

款式分类：

(1) 开式发电机

开式发电机就是柴油机，发电机，水箱和控制屏直接组装在底座上，没有防护罩盖住机身。

(2) 静音发电机

静音发电机就是带有静音箱的发电机，一般可达到在距机组7米远测到60-75DB 。

(3) 移动式发电机

移动式发电机就是把机组安装在拖车上，或者汽车上等带有可方便运输使用的设备上。

Generator sets can be divided into two categories based on the method of converting electrical energy: AC generators and DC generators. AC generators are divided into two types: synchronous generators and asynchronous generators. Synchronous generators are divided into two types: hidden pole synchronous generators and salient pole synchronous generators. The most commonly used in modern power plants is synchronous generators, and asynchronous generators are rarely used. AC generator sets can be divided into two types: single-phase generators and three-phase generators. The output voltage of a three-phase generator is 380V, and the output voltage of a single-phase generator is 220V.

Classification of excitation methods:

According to the excitation method, it can be divided into two types: brushed excitation generators and brushless excitation generators. The excitation method for brushed excitation generators is separately excited, while the excitation method for brushless excitation generators is self-excited. The rectification device of a self-excited generator is located on the stator of the generator, while the rectification device of a self-excited generator is located on the rotor of the generator set.

Style classification:

(1) Open type generator

An open type generator is a diesel engine, with the generator, water tank, and control panel directly assembled on the base without a protective cover covering the body.

(2) Silent generator

A silent generator is a generator with a soundproof box, which can generally reach 60-75DB at a distance of 7 meters from the unit.

(3) Mobile generator

A mobile generator is a device that installs the unit on a trailer, car, or other equipment that is easy to transport and use.