基于步进式电子变阻器的直流电机调速技术

Direct-current motor adjustable-speed technology based on stepping electronic rheostat

介绍了多级电子分档调速技术。采用步进式电子变阻器和晶闸管研制成的新型直流电机调速电路能使速度逐级平缓地变化。电路设计闭环控制形式,能自动用多种条件完成对直流电动机的控制,并减少功耗。该技术已用在电瓶叉车上,能保证其起步平稳,有效地防止因速度跳变而对机械传动装置所产生的极大冲击力。失控保护电路,既保证安全运行,又能实现联锁及安全自保。该电路在电机控制技术中有较广阔的发展空间。

Muhievel electronic-gears adjustable-speed technology has been introduced. It adopted stepping electronic rheostat and thyristors, and had developed new direct-current motor （DCM） adjustable-speed circuit. Speed change was progressive, step by step, without skipping. The circuit was closed-loop control form. It could complete the control means to the DCM in many ways automatically. Power dissipation was smaller. Battery forklift had applied its technology, the forklift might start smoothly, and active prevented to impact machine delving set by skipping speed, and had designed runaway protecting circuit by logical circuit for safe move. Realizing interlock and self-protect function. The circuit could avoid switching charged contact at contactor also. Which leads to favorable economic benefits and production results. It has a wide developing space in motor controlling technology.