英语翻译内容是：本设计电梯采用了线性调速的调压调频调速 (VVVF)技术,并且VVVF电梯采用PLC控制,有完善的自检测

英语翻译
内容是：
本设计电梯采用了线性调速的调压调频调速 (VVVF)技术,并且VVVF电梯采用PLC控制,有完善的自检测、自诊断、自保护功能,因而十分安全可靠.而且本电梯是按照理想的电梯运行曲线,通过矢量控制软件对电动机进行精确调节,因而电梯平稳、舒适.另外,本设计采用交流调压调频调速与同规格的传统电梯相比,可节能40%.
本设计还重点研究了电梯门机拖动控制系统的设计,包括两大部分即硬件设计和软件设计,使其运行安全可靠、性能稳定.本设计的门拖动控制系统采用了当前最新的永磁同步伺服系统,这是本设计的重点和创新点.其创新点为:（1）永磁同步门控系统：目前最先进的门控系统,充分体现了本观光电梯的高档性.（2）入口安全保护：将安装红外线光幕式保护装置,以提高安全可靠性.（3）电梯专用空调：观光电梯内安装空调,满足人性化设计要求.（4）语音到站钟：在嘈杂的商厦中,大功率语音报站钟是个性化的设计体现.
本设计的研究成果若在实际电梯工程中得到应用,必将取得良好的经济效益和社会效益.

This design uses a linear speed of the elevator VVVF speed (VVVF) technology,and VVVF elevator with PLC control,a perfect self-detection,self-diagnosis,self-protection function,which is very safe and reliable.And the elevator is the elevator in accordance with the ideal curve,through the vector control software to fine tune the motor,so the lift smooth and comfortable ride.In addition,the design of AC VVVF speed with the same specifications than conventional elevators can be energy-saving 40%.
The design also focuses on the elevator door machine drag the control system design,including two parts namely,hardware design and software design to make it safe and reliable operation and stable performance.The design of the door control system uses the current drag the latest permanent-magnet synchronous servo system,which is the focus of this design and innovation points.Its innovative point:(1) permanent magnet synchronous gating system:At present the most advanced door control system,fully embodies the high-grade nature of this sightseeing elevator.(2) The entrance security protection:the installation of infrared light curtain type protection devices to improve security and reliability.(3) Elevator Air conditioning:sightseeing elevator to install air-conditioning,to meet the user-friendly design requirements.(4) voice arrival clock:in commercial buildings in the noisy,high-power voice-stop clock is the design of personalized expression.
This design research project if the actual elevator applied,will achieve good economic and social benefits.