一当前我国在矿井提升机上使用国产和进口的KZ-D调速系统越来越多了。这主要是由于KZ-D系统是直流调速,它较绕线电机转子串、切电阻的交流调速有许多优点,如调速性能好,节能等等;它较F-D机组直流调速系统具有效率高、噪声小、有色金属耗量少和较好的动态品质等优点。今后将随着我国矿山开发向大型、集中和自动化方向发展,这些优点将更突出。我国煤矿提升机上目前使用的KZ-D系统是磁场可逆逻辑无环流调速系统(简称旧KZ-D系统)。这个系统虽然较电枢可逆逻辑无环流系统的快速性较差、控制系统复杂,但是它还能较好满足矿井提升机工作过程要求,并且电枢回路元、器件大大节省,因此在提升上得到广泛应用。可是上述系统,提升机在起动、爬行和轻载时变流器处于深控状态工作,这将出现很大的无功冲 At present, China has more and more domestic and imported KZ-D speed regulating systems used in mine hoists. This is mainly due to the KZ-D system is DC speed control, it is more winding motor winding, cut the resistance of the AC speed control has many advantages, such as speed performance, energy saving, etc .; it is more than the FD unit DC speed control system has High efficiency, low noise, less non-ferrous metal consumption and better dynamic quality. In the future, with the development of large-scale, centralized and automated mines in our country, these advantages will be more prominent. The KZ-D system currently used on the mine hoist is a magnetic reversible logic non-circulating speed control system (referred to as the old KZ-D system). Although this system is more rapid than the armature reversible logic non-circulated system, the control system is complex, but it also can better meet the working requirements of the mine hoist, and the armature loop element, the device greatly saves, so on the upgrade widely used. However, the above system, hoist in the start, crawling and light load when the converter is in deep control state, which will appear a great deal of reactive power