Application of HSF600 non-inductive vector VFD (Variable-frequency Drive) in elevators

With the increase in residential high-rises and small high-rise buildings, as well as the large-scale promotion of major shopping malls and commercial buildings, the use of elevators has also increased. Correspondingly, the use of VFD (Variable-frequency Drive) in elevators has also increased. A rising tide lifts all boats. However, foreign brands account for the majority of VFD (Variable-frequency Drive) used in the elevator industry, such as Japan's Yaskawa, Germany's Kobe, and China's domestic VFD (Variable-frequency Drive) cannot be used in the elevator industry in large quantities. This is mainly because Because China's domestic VFD (Variable-frequency Drive) is mainly based on the general VVVF control method, high-end VFD (Variable-frequency Drive) such as high-performance vector VFD (Variable-frequency Drive) is rarely launched, and then there is the elevator industry , the torque characteristics and speed response requirements of VFD (Variable-frequency Drive) are relatively high, and ordinary VFD (Variable-frequency Drive) manufacturers do not have machines that can adapt to such performance.

HSF600 vector control VFD (Variable-frequency Drive) is a high-performance VFD (Variable-frequency Drive) independently developed and produced by our company. In the design, we have always pursued the concept of high performance and wide application. With the launch of new products, the first application we selected is the elevator, because it directly tests the VFD (Variable-frequency Drive) torque response. The speed, accuracy of control and precision of speed control.

Collaborated with the engineering debugging personnel of an elevator company to transform the elevator of a company. The company's elevator uses the German Benk controller, the VFD (Variable-frequency Drive) uses the Japanese Yaskawa, the motor is 15KW, and the Japanese Yaskawa VFD (Variable-frequency Drive) 15KW. We have replaced HSF600-15RG/18RP-T4 (15KW) with the same specifications. Let me briefly introduce the operating mode and working method of the elevator:

As shown in the figure above, the mechanical part of the elevator mainly consists of the car, the counterweight passes through the traction sheave of the traction machine, and then the VFD (Variable-frequency Drive) controls the relative balance between the car and the counterweight. The specific control loop is as follows:

Control method: First, the controller gives a forward/reverse running signal according to actual needs, corresponding to the up/down movement of the elevator, and then gives a brake signal to release the brake of the traction machine, and the VFD (Variable-frequency Drive) is at zero speed. A torque is given to balance the car and the counterweight. Next, the controller gives a speed selection signal according to the floor to be reached. X1, X2, and X3 in the VFD (Variable-frequency Drive) are given according to the terminal settings. Running frequency, deceleration signal and leveling signal are given during operation. VFD (Variable-frequency Drive) selects the signal according to the given speed and adjusts the output frequency accordingly until it stops.

Elevator debugging has high requirements for comfort, and passenger elevators have even higher requirements, so the S curve is used for the speed curve of VFD (Variable-frequency Drive) during debugging. The controller will have a certain zero speed during startup and shutdown. interval, so the zero servo function is turned on to ensure that the VFD (Variable-frequency Drive) still has a large enough torque output when the frequency is set to 0. Due to the encoder pulse feedback, closed-loop vector control is used. During the specific debugging process It is divided into several steps: first, ask the elevator company engineering debugging personnel to hoist the box, enter the motor nameplate parameters, and perform motor parameter self-learning. Then the elevator is reinstalled, parameter settings are performed, and trial operation is performed to further correct the VFD (Variable- Frequency Drive) parameters, so that the elevator operation can achieve satisfactory results. Some of the main functional parameters are set as follows:

Since the encoder is powered by 12V during use, you can use the 8-20V adjustable PGP2 power supply port provided on the control board. The actual operating conditions, elevator comfort and other indicators have been recognized by the engineering debugging personnel of the elevator company and can replace Japan's Yaskawa VFD (Variable-frequency Drive).