Softstarter Pump Self-Cleaning via Reverse Rotation
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Solution Overview
Problem
Current solutions for preventing jamming and clogging in pump systems, such as manual labor or frequency converter controlled pumps, are labor-intensive, complex, and costly, with no attractive solutions available for softstarter controlled electric motors.
Innovation Solution
A method for controlling softstarter circuitry to operate electric motors in pump systems, involving acceleration to full speed, deceleration, reversal to specified speed, and deceleration in reverse direction, repeated multiple times, which effectively clears unwanted solid objects and flushes effluent residue without requiring external line contactors, using a computer program and control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual labor or frequency converter controlled pumps are used to prevent jamming and clogging, then pump cleaning effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The pump system performs self-cleaning by automatically reversing rotation when jamming or clogging is detected through torque monitoring, eliminating the need for external cleaning equipment or manual intervention. The system uses its own motor and pump components to clear blockages through reverse operation.
Solution Approach 2:
The control system continuously monitors pump torque and automatically triggers reverse rotation when torque exceeds predetermined thresholds indicating jamming or clogging conditions. This closed-loop feedback mechanism enables automatic detection and correction of pump problems.
2Reliability
If frequency converter controlled pumps are used for automatic cleaning, then pump cleaning effectiveness is improved, but cost increases
Solution Approach 1:
The softstarter circuitry is designed to perform both its primary function of motor starting control and an additional cleaning function by reversing motor rotation. This multi-functionality eliminates the need for separate cleaning equipment or frequency converters, reducing overall system cost.
Solution Approach 2:
The pump system uses its own existing motor and softstarter components to perform self-cleaning, eliminating the need for external cleaning equipment or additional frequency converter hardware, thereby reducing system cost.
3Adaptability or versatility
If external line contactors are used to control reverse direction, then reverse operation capability is improved, but device complexity increases
Solution Approach 1:
The softstarter circuitry is designed to perform both its primary function of motor starting control and an additional cleaning function by reversing motor rotation. This multi-functionality eliminates the need for separate cleaning equipment or frequency converters, reducing overall system cost.
4Productivity
If pump operates continuously in forward direction, then productivity is improved, but jamming and clogging occur
Solution Approach 1:
The control system periodically reverses pump rotation based on monitored torque conditions, creating alternating forward-reverse operation cycles. This periodic reverse action prevents permanent settlement of particles and effluent on pipe walls, maintaining pump efficiency and preventing clogging.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a simple, cost-efficient, and robust automatic cleaning solution that increases pump efficiency and reduces the risk of damage, allowing for low-cost, reliable, and precise maintenance without the need for external contactors.
Implementation Method 1
a control device (15) including a computer program (18)... controlling the circuitry (14) of the softstarter arrangement to accelerate the motor (12) up to full speed in a forward direction
Data Source
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AI summary
A method for controlling circuitry (14) of a softstarter arrangement (11) to operate an electric motor (12) for driving a pump is provided, wherein the softstarter circuitry electrically connects the motor to electric mains. The method comprises: (i) controlling (32) the circuitry of the softstarter arrangement to accelerate the motor up to full speed in a forward direction; (ii) controlling (33) the circuitry of the softstarter arrangement to decelerate the motor when the motor has run at full speed in the forward direction for a first period of time; (iii) controlling (34) the circuitry of the softstarter arrangement to accelerate the motor up a specified speed in a reverse direction; (iv) controlling (35) the circuitry of the softstarter arrangement to decelerate the motor when the motor has run at the specified speed in the reverse direction for a second period of time; and (v) repeating the steps (i)-(iv) one or more times.