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VFD on blender

The blender is widely used in the fields of chemical, pharmacy, food, cement, plastic and so on. However, massive energy is being wasted by the blender as it is always designed with larger capacity but commonly needn’t run at the rated speed. In addition, traditional mechanical speed control mode increases wear and tear risk, and also affects operating condition of the blender.

Blender introduce
According to the characteristics of the blender, it is recommended to install a vector control variable frequency drive (How to choose) to realize reasonable and efficient speed control, and add the bypass function, so as to realize switch between the VFD and the mains supply. In addition, the vector control VFD has multi-step speed function, which can be selected and set according to the material characteristics and chemical reaction time. The VFDs also can help realize on line control through its powerful communication function with the industrial control computer and software.

Nearly 100 sets of upper 400kW high performance vector control VFDs manufactured by Gozuk have been put into use in various industries, including the cement industry, the petrochemical industry, the ceramic industry, heating & ventilation, water supply, etc.

VFD features:
1. Applicable to large inertia load and potential load, with high accuracy. The GK3000 series VFD can be better suitable to tough localities as its main circuit adopts the positive and negative bus superposition technology, as well as SCR noncontact technology.
2. Four control modes for option: V/F control, V/F control with P/G, vector control, and vector control with PG, which enable the VFD with high starting torque.
3. In the mode of open-loop, can realize rated torque output at low speed, speed control range hits 100:1
4. In the mode of closed-loop, can realize full torque output at zero speed, with speed control range up to 1000:1
5. Advanced motor parameter autotuning function
6. Built-in automatic torque compensation function realizes high starting torque.
7. Built-in slip compensation function realizes high efficiency.
8. Built-in RS-485 communication port, supporting MODBUS communication protocol.
9. Built-in PID regulator
10. Friendly user interface, large screen LCD. Can realize parameter online monitoring and online regulation, in addition to parameter copy function, making operation more convenient.
11. Torque control function enables the motor be able to run with a constant torque
12. Less pollution to the grid

Reconstruction Proposal:

variable frequency drive for blender

On the operation desk, the user can enable RUN/STOP, and speed control functions, and monitoring is also accessible through sending the frequency and current signals back to the operation desk in the control room.

After reconstruction, the system can meet all the requirements of the previous soft start system. What is more important, the user can maintain the operating frequency of the VFD at 40HZ, which is enough for its normal production. The current at the input side is around 630A, representing an energy saving rate up to 32% (learn more about VFD energy saving), compared with the previous 910A. Since the installation of the VFD last Oct., it has been working smoothly. In addition, it helps the user secure a mass of maintenance and repair cost as it can effectively prolong the useful life of the blowers.

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