Flour Machine is a wheat processing machine that relies on the external power, such as the power produced by the motor, grinding the wheat into small particles and to separate the flour particles of different sizes by adjusting the size of the sieve holes.Flour mill is mainly divided into full automatic flour mill, stone flour mill, Corn Flour Machine, small flour mill and large flour mill.
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Motor Speed ​​Curve Smart Motor Controller External Wiring Conventional autotransformer step-down control start-up circuit is composed of single components and the wiring is complex; while the control part of the smart motor controller is a whole, users only need to wire the terminals they provide. Simple and practical.
Alternatives Through the performance analysis of the two control methods, replacing the step-down starting circuit of the autotransformer with a smart motor controller with a pump control function has great advantages in practice.
Intelligent motor controller external wiring 5 Optimize system performance Through practice, replacing the autotransformer step-down starting circuit with a smart motor controller with pump control function can fully meet motor start-up requirements, improve pump system function, and play a role in protecting the equipment. .
Changing the tap connection position of the autotransformer can adjust the motor starting current and improve the influence of the motor start on the line voltage. An autotransformer usually has only three taps and cannot be continuously adjusted. Therefore, the motor starting current that has the least influence on the line voltage is not obtained. The intelligent motor controller has a soft-start function, and the motor voltage can first rise to an initial torque value. This value can be adjusted within 5Supporting Activated Carbon Equipment of the locked rotor torque. The motor gradually increases during the ramp-up, and the ramp-up time can be adjusted within 230 seconds to obtain the optimal starting performance required by the motor. The effect on the line voltage can be reduced to a minimum.
Eliminating Surge in a Surge Pump System of a Pump System Primarily due to a sudden change in fluid flow or pressure in a pipeline due to the start and stop of a pump or the opening and closing of a valve. Using a smart motor controller eliminates pump system surge.
Pump starts. The step-down startup of the autotransformer does not take into account the characteristics of the pump system. After the startup is over, the stator voltage of the motor suddenly jumps to the normal voltage. Known from the electromagnetic torque MU2, there is a sudden change in the electromagnetic torque, which makes the liquid flow in the pipeline and Simultaneous changes in pressure, the pump system produces surge.
The intelligent motor controller can preset a minimum torque that meets the motor start requirements, and the motor stator voltage is continuously raised to the normal voltage within a preset start time, the electromagnetic torque is also continuously increased, and the flow rate in the pipeline is not changed. In order to avoid the occurrence of surge in the pump system. The curves for both flow rate and time at startup are shown.
When the pump starts, the flow curve is an auto-transformation and pressure-reduction start-up mode; it stops for the intelligent motor controller. When the autotransformer step-down start control circuit stops the pump, the motor stator coil voltage is reduced from 380V to 0, the electromagnetic torque M is also reduced from the working torque to 0, the fluid flow in the pipeline is rapidly reduced, due to the occurrence of the water hammer pump system Vibration phenomenon.
The intelligent motor controller can use the interactive calculation method to set the downtime and reduce the motor voltage continuously as the pump load decreases without the feedback device until the pump stops smoothly. At this time, the flow and pressure in the pipeline are also continuously reduced, and no surge phenomenon occurs. The structure is simple and easy to maintain. After applying the intelligent motor controller, the mechanical contact is reduced to the control loop, the equipment failure rate is reduced, and the wiring is simple, easy to maintain, and meet the continuous production requirements.
Replacement of Transformer Decompression Startup Cable with Automatic Motor Control System
Smart Motor Controller Operation The intelligent motor controller with optional pump control function allows the motor to accelerate or decelerate smoothly at a selectable acceleration or deceleration value, resulting in a surge in the starting or stopping of the centrifugal pump. Get reduced. At the same time, the intelligent motor controller's microprocessor analyzes motor parameters and user-programmed programs and issues control commands to meet motor start-up requirements.