Vacuum cleaner and method and device for detecting a motor driven brush type for a vacuum cleaner, method and device for operating a vacuum cleaner, motor-driven brush for a vacuum cleaner
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Solution Overview
Problem
Existing vacuum cleaners lack an effective method to identify and differentiate types of motor-driven brushes, which limits the ability to optimize cleaning performance based on the brush type, and also face challenges in enhancing electromagnetic compatibility without increasing costs or complexity.
Innovation Solution
A method and device that utilize a series connection of a motor and a signal modifier, where an excitation signal is provided to identify the brush type by analyzing the measurement signal's characteristics, such as step response, amplitude, and time profile, allowing for brush-specific control and improved electromagnetic compatibility through a cost-effective approach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vacuum cleaner uses a motor-driven brush without type identification, then the device complexity is reduced, but the cleaning performance cannot be optimized based on brush type
Solution Approach 1:
The brush assembly performs self-identification by utilizing its own motor's electrical characteristics (inductance, resistance, back-EMF) to generate unique identification signals. The control unit reads these inherent electrical properties during motor operation or idle state to automatically determine brush type, eliminating the need for external sensors or manual input devices.
Solution Approach 2:
The system identifies brush type by measuring electrical parameters (inductance L, resistance R, back-EMF constant) of the brush motor. Different brush types have distinct electrical characteristics due to variations in motor design, winding configuration, or gear ratios. The control unit compares measured parameters against stored reference values to identify the specific brush type and optimize cleaning parameters accordingly.
2Measurement precision
If additional components are added to identify brush type, then the measurement precision of brush type detection is improved, but the device complexity and cost increase
Solution Approach 1:
The brush assembly performs self-identification by utilizing its own motor's electrical characteristics (inductance, resistance, back-EMF) to generate unique identification signals. The control unit reads these inherent electrical properties during motor operation or idle state to automatically determine brush type, eliminating the need for external sensors or manual input devices.
Solution Approach 2:
The patent replaces mechanical identification methods (such as physical tags, switches, or mechanical sensors) with electrical measurement techniques. By measuring electrical parameters like inductance, resistance, and back-EMF, the system achieves precise brush type detection without adding mechanical complexity or external sensing components.
3Object-affected harmful factors
If the vacuum cleaner lacks electromagnetic compatibility measures, then the device complexity is reduced, but harmful electromagnetic interference increases
Solution Approach 1:
The patent converts the potentially harmful electromagnetic emissions from the brush motor into useful identification signals. By measuring the back-EMF and inductance characteristics of the motor, the system generates unique electrical fingerprints that identify brush type while simultaneously suppressing electromagnetic interference through proper signal conditioning and filtering in the measurement circuitry.
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
Enables accurate identification and control of motor-driven brushes, enhancing cleaning performance and electromagnetic compatibility by distinguishing between different brush types using a simple and cost-effective series connection of a motor and coil, reducing the need for additional components and minimizing losses.
Implementation Method 1
the inductance of the signal modifier can also increase electromagnetic compatibility of the brush and thus of the vacuum cleaner
Data Source
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AI summary
The invention relates to a method for identifying the type of motor-driven brush (105) for a vacuum cleaner (100). The brush (105) comprises a first electrical contact (115), a second electrical contact (120), and a series and/or parallel circuit consisting of at least one signal modifier (125) and a motor (130) connected between the first electrical contact (115) and the second electrical contact (120). The method (700) includes a provision step, a reading step, a determination step, and a detection step. In the provision step, an excitation signal (150) with an excitation characteristic is provided to an interface to the first contact (115). In the reading step, a measurement signal (155) is read at an interface to the second contact (120).In the determination step, a characteristic signal (160) indicating a characteristic of the measurement signal (155) is determined, and in the identification step, the type of brush (105) is determined using the characteristic signal (160).