电梯电气系统无论采用何种拖动形式,都离不开速度控制这一重要问题的研究。对用户来讲,除了要求电梯具有可靠性、造型美观、安全性之外,最易提出的直接要求是希望乘座时舒适感好、效率高、平层精确。这三个重要性能指标在一定程度上又是相互 Elevator electrical system no matter what kind of drag form, are inseparable from the speed control of this important issue of research. In terms of users, in addition to requiring the elevator with reliability, attractive appearance, safety, the most direct request is the most easy to ride comfort, high efficiency, accurate leveling. To some extent, these three important performance indicators are mutual