What is the working principle of elevator frequency converter?
The basic principle of VVVF elevatorAccording to the theory of motor, the speed formula of AC motor is:N=60f (1-s) /pUpper type: F is the stator frequency, and P is the pole count;S is slip; n is speed.
Yaskawa 616G5 transducer current vector in the world as one of the inverter control, speed range to reach 1:1000, the control accuracy of 0.02%, with the starting torque at zero speed can reach 150% characteristics. In particular, Yaskawa unique all fields, automatic torque boost function can get comfort and good stability in the lift drag in.G5 can accept controllers such as multi speed frequency command PLC or analog voltage and current instruction; can adapt to all kinds of motor vector control and self-learning to obtain good characteristics; low speed starting smoothly excellent reliability and high cost of hardware.
Elevator inverter is generally voltage type AC DC AC converter. The basic construction consists of three parts:1, rectifier circuit, alternating current into direct current2, DC bus, energy storage link, the completion of reactive power exchange in the link, the inverter can obtain higher input power factor.3, inverter, DC inverter to variable frequency and amplitude of alternating current, so that the motor work at different speeds.For detailed transducer principles, see attachment.
