Rotary Pump Controller with Manual Bypass Switch
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Solution Overview
Problem
Centrifugal pump arrangements face challenges in ensuring fail-safe operation with minimal complexity, particularly in scenarios where electronic components fail, requiring skilled intervention and system downtime for maintenance or replacement.
Innovation Solution
A manually operable switch integrated into the control and/or regulating device allows direct electrical connection of the electric motor to a variable or fixed supply voltage, automatically switching to the fixed voltage in case of actuator or electronic component failure, bypassing electronic components without reconnecting cables, and enabling safe operation independent of other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a frequency converter with control electronics is integrated into the centrifugal pump unit, then the speed of the centrifugal pump unit can be continuously controlled, but the system complexity increases and electronic component failures require skilled intervention and system downtime
Solution Approach 1:
The patent segments the control system into a manually operable switch and a separate frequency converter with control electronics. The switch provides simple on/off functionality that bypasses the electronic components, while the frequency converter remains available for continuous speed control when needed. This segmentation allows the system to benefit from both simple manual control and advanced automated control without the complexity of integrating both functions into a single component.
Solution Approach 2:
The patent extracts the manual switching function from the electronic control system. By providing a separate manually operable switch that directly controls power to the motor, the system removes the dependency on electronic components for basic operation. This extraction ensures that even if the frequency converter or control electronics fail, the pump can still be operated through the standalone switch.
2Adaptability or versatility
If electronic components are used for speed control, then continuous speed adjustment is possible, but maintenance or replacement requires disconnecting mains cables and skilled electricians
Solution Approach 1:
The patent extracts the manual switching function from the electronic control system. By providing a separate manually operable switch that directly controls power to the motor, the system removes the dependency on electronic components for basic operation. This extraction ensures that even if the frequency converter or control electronics fail, the pump can still be operated through the standalone switch.
Solution Approach 2:
The manually operable switch acts as an intermediary between the operator and the motor, providing a simple interface that does not require interaction with complex electronic components. During maintenance, this intermediary switch allows operators to control power without needing to disconnect or reconfigure the frequency converter or control electronics, significantly improving ease of repair.
3Device complexity
If the control device is integrated with the motor, then space is saved, but failure of electronic components causes complete system failure
Solution Approach 1:
The patent segments the control system into a manually operable switch and a separate frequency converter with control electronics. The switch provides simple on/off functionality that bypasses the electronic components, while the frequency converter remains available for continuous speed control when needed. This segmentation allows the system to benefit from both simple manual control and advanced automated control without the complexity of integrating both functions into a single component.
Solution Approach 2:
The patent implements prior cushioning by providing a manually operable switch as a backup control method. In case the frequency converter or control electronics fail, the switch ensures continuous operation of the pump. This redundancy cushions against complete system failure and maintains reliability even when electronic components malfunction.
Data Source
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AI summary
The invention relates to a rotary pump arrangement having a rotary pump, an electric motor, and a controller and/or regulator. The controller and/or regulator is applied to the electric motor and connected to a rigid electrical supply voltage. An actuating member of the controller and/or regulator affects the rotational speed and/or the torque of the electric motor by means of a variable electrical output parameter. The controller and/or regulator (5) comprises a switch (17) that can be manually actuated. The switch (17) comprises a first switch setting, wherein the switch (17) electrically connects the electric motor (4) to the supply voltage by means of the actuating member (20) of the controller and/or regulator (5). The electric motor (4) is thereby fed by means of the variable electrical output parameter of the actuating member (20). The switch (17) comprises a second switch setting, wherein the switch (17) electrically connects the electric motor (4) to the rigid electrical supply voltage. The electric motor (4) is thereby operated directly at the rigid supply voltage.