Vacuum Motor Power Control Using Voltage and Current Feedback
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Solution Overview
Problem
Battery-powered vacuum cleaners face reduced suction power due to battery voltage decrease during discharge cycles, and corded AC vacuum cleaners have high energy consumption due to insufficient airflow adaptation, while prior art methods fail to accurately control motor power in response to airflow changes.
Innovation Solution
A vacuum cleaner system that uses both voltage and current as feedback parameters to control motor power, allowing for more accurate suction power management independent of airflow changes, with a control mechanism that adjusts power supply based on measured voltage and current to maintain target motor power values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery capacity is increased to maintain suction power during discharge cycle, then suction power is improved, but weight and cost increase
Solution Approach 1:
The control system dynamically adjusts motor power based on real-time battery voltage measurements. As battery voltage decreases during discharge, the controller reduces motor power consumption proportionally, maintaining optimal suction power within available battery capacity without requiring oversized batteries.
Solution Approach 2:
The system changes the operating parameters of the motor by adjusting power consumption levels according to battery state. The controller monitors battery voltage and adapts motor power draw accordingly, optimizing the balance between suction performance and battery capacity requirements.
2Weight of moving object
If motor power is limited to reduce battery capacity requirements, then battery weight and cost are reduced, but suction power becomes insufficient under load
Solution Approach 1:
The control system implements feedback control by continuously monitoring battery voltage and adjusting motor power consumption in response. This feedback mechanism ensures that the motor draws appropriate power levels based on actual battery capacity, preventing power deficiency while optimizing battery utilization.
Solution Approach 2:
The system dynamically adapts motor power consumption to match available battery capacity. By continuously adjusting power draw based on battery voltage feedback, the system maintains sufficient suction power for cleaning tasks while avoiding the need for oversized, heavier batteries.
3Power
If suction power is maintained at high level for all conditions, then performance under blocked inlet is improved, but energy consumption increases
Solution Approach 1:
The control system dynamically adjusts motor power consumption based on real-time battery voltage measurements. The motor power is increased or decreased dynamically to match available battery capacity, ensuring high suction power when battery voltage is high while reducing power consumption when battery voltage decreases, thus optimizing energy utilization.
Solution Approach 2:
The system changes motor power parameters in response to battery voltage variations. By adapting power consumption to actual battery capacity, the system maintains high suction performance when energy is abundant while reducing energy consumption when battery capacity is limited.
4Measurement precision
If current measuring means is added to control system, then motor power control accuracy is improved, but device complexity increases
Solution Approach 1:
The control system uses feedback from both voltage and current measurements to accurately determine actual motor power consumption. This dual-parameter feedback provides precise control of motor power, enabling the system to optimize performance while adapting to battery capacity and airflow conditions.
Solution Approach 2:
The control system integrates multiple measurement functions into a single control unit. The same control architecture that manages battery voltage monitoring also processes current measurements and coordinates motor power adjustment, reducing overall system complexity despite the added measurement capability.
Data Source
AI summary
A vacuum cleaner and a method for controlling the motor power of a vacuum cleaner are disclosed. The vacuum cleaner comprises an electric motor and an electric power supply for providing electric power to the electric motor. Furthermore, a voltage measuring means for measuring a motor voltage over the electric motor and a current measuring means for measuring a motor current flowing through the electric motor are provided. The vacuum cleaner further comprises a control means for controlling, based on the measured voltage and the measured current, the electric power provided to the electric motor from the electric power supply towards a target motor power value.