Disadvantages of traditional winch
1. The series resistance speed regulation changes in a jumping manner, causing the reducer gear, crown wheel, middle wheel, material car, and inclined bridge guide rail to be impacted during the acceleration and deceleration operation stages. The equipment is prone to damage, and the steel wire rope is prone to fatigue, resulting in a large amount of maintenance and an increase in maintenance costs.
2. The range of series resistance speed regulation is small, causing a sudden change in the speed of the hopper car. After deceleration, there is still a high speed when parking, which requires high adjustment accuracy of the brake and limit switch, and is prone to offside and lane dropping accidents, which affect production.
3. Series resistor speed regulation ensures that most of the electrical energy is consumed by the resistor during the start-up and deceleration of the hopper car; When the voltage of the motor drops, the torque decreases and the slip rate increases. In severe cases, the hopper truck cannot start and is prone to accidents.
4. High energy consumption and soft low-speed mechanical characteristics. Because the decrease in speed is achieved by consuming energy through the external resistance of the rotor, and the lower the speed, the softer the mechanical characteristics, and the greater the proportion of energy consumed in the resistance, which is extremely uneconomical. Moreover, the high or low voltage of the power grid has a significant impact on speed.
 
Frequency conversion transformation of traditional control
1. Short circuit the rotor winding of the wound wire motor and cancel the original series resistance speed regulation scheme; Switching circuits can also be designed to use the original series resistance speed regulation scheme as a backup solution.
2. Power the motor brake system independently and control it with the assistance of a frequency converter.
3. Transform the original speed control device to enable it to control the speed of the frequency converter.
4. String the fault protection signal of the frequency converter into the safety circuit. Complete set of winch frequency conversion control system
5. AD800 vector frequency converter is used as the core of the speed control system, and PLC is used as the control system core.
6. Multiple protections can be designed according to different configurations. And the control system can be flexibly customized according to needs.
 
Product utility
1. With its excellent performance, AD800 vector inverter greatly improves the operation stability and safety of traditional winch, and reduces the maintenance of equipment. The control system customized by Kevo for winch integrates many safety technologies and automatic control functions, provides a complete set of electric control solutions for winch equipment manufacturers, and can also make the old winch rejuvenate.
At the same time, there are also applications of permanent magnet synchronous motor+resolver+synchronous motor driver+touch screen on winch.