1、Introduction
With the improvement of grain varieties, the increase in yield per unit, and the increase in national investment in grain drying equipment, more and more large, medium and small grain drying facilities are being built. It is crucial to select a dryer with high quality, long service life, economic and practical, good reliability, and high degree of automation.
2、Frequency converter drive technology requirements and classification
(1) Inverter drive technology requirements:
Stable quality of the inverter
High low-frequency torque
High efficiency (energy saving)
Wide speed regulation range
Ultra-low temperature safe start
(2) Classification by performance characteristics of the drying tower:
Cross-flow dryer
Downstream dryer
Mixed flow dryer
Counter-current, mixed countercurrent, and concurrent mixed flow dryer
(3) Frequency drive classification by usage:
Smoke exhaust fan
Blower
Hot air blower
Cooling fan
Grain discharge roller motor
3、Debugging
(1) Explanation of inverter selection
Motor end: motor type, regular frequency, speed, current value
Upper machine end: analog quantity given, pulse given, communication
(2) Inverter wiring
Inverter control wiring diagram
(3) Equipment process flow
(4) Main debugging parameters
4、Advantages of FRECON Inverter Control
(1) Energy and power saving rate can reach 15-25%
(2) Reduce reactive power, improve power factor, and reduce grid pollution
(3) Superior stability, 24/7 sustainable working characteristics, ensuring equipment operation efficiency
(4) Wide speed regulation range, generally up to 100:1. And it has high speed regulation efficiency throughout the speed regulation range
(5) Ultra-low temperature safe start, suitable for working characteristics in various ultra-low temperature environments
5、Conclusion
The FRECON inverter has high-quality, high-power density design, and stable quality, easy maintenance, wide adaptability, simple operation, and other excellent performance. Its design is flexible, with SVC and V/F control built-in, and can be widely used in applications that require high speed control accuracy, torque response speed, and low-frequency output characteristics.
6、On-site Application Pictures
