Pulley Motor Control Integration for Washing Machine Pump Wiring
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Solution Overview
Problem
The complexity and bulkiness of cabling in washing machines due to the need for multiple electronic components and separate power supplies for different devices, such as pulley electric motors and discharge pumps, complicate the design, increase costs, and reduce reliability.
Innovation Solution
Integration of electronic control circuitry within the pulley electric motor to control both the motor and the discharge pump, using a main inverter for the motor and a secondary inverter for the pump, eliminating the need for direct connection to the external electrical network and reducing the number of components and cabling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate electronic control circuitry and power supplies are used for the pulley electric motor and discharge pump, then each device can be controlled independently, but the cabling becomes complex and bulky
Solution Approach 1:
The patent combines the electronic control circuitry and power supply into a single integrated unit located in the pulley electric motor. This integrated unit controls both the pulley electric motor and the discharge pump, eliminating the need for separate control circuitry and reducing cabling complexity while maintaining independent control capability through electronic switching.
Solution Approach 2:
The electronic control circuitry in the pulley electric motor is designed to perform multiple functions: controlling the pulley electric motor itself and controlling the discharge pump. This multi-functionality reduces the need for separate dedicated control units and simplifies the overall system architecture.
2Adaptability or versatility
If multiple separate electronic components are installed, then each component can perform its specific function, but the washing machine becomes more costly and less reliable
Solution Approach 1:
By merging the electronic control circuitry and power supply into a single integrated unit, the patent reduces the number of connection points and potential failure points in the system. Fewer separate components mean fewer opportunities for malfunction and improved overall system reliability.
3Power
If direct connection to external electrical network is maintained for each device, then each device receives adequate power, but the number of power supply cables increases
Solution Approach 1:
The patent consolidates power distribution through a single power supply unit that receives power from the external electrical network and distributes it to both the pulley electric motor and discharge pump. This eliminates the need for separate power supply cables for each device while ensuring adequate power delivery through electronic control.
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
Simplifies the washing machine design, reduces production complexity, enhances reliability, and minimizes the presence of bulky components like heat dissipaters, while maintaining efficient operation and user accessibility.
Implementation Method 1
The pulley electric motor is preferably of the type synchronous with a permanent magnet rotor and with an inner stator fixedly connected to a fixed axis. The outer rotor, equipped with permanent magnets, surrounds the stator with spacing due to an air gap. The stator is equipped with polar expansions wrapped around with windings fed with power so as to impose a rotary magnetic field to the air gap; such a rotary magnetic field, interacting with the magnetism of the permanent rotor magnets, makes the rotor rotate.
Implementation Method 2
The pulley electric motor comprises electronic control circuitry, which is able to control the operation of the inverter to control the motion of the pulley electric motor.
Implementation Method 3
A discharge electric pump is normally equipped with an electric pumping motor capable of actuating an impeller. The discharge electric pump has the task of sucking out dirty water from the washing drum to return it to a waste water network.
Data Source
AI summary
A pulley electric motor for a washing machine, comprising a stator, a rotor, electronic power circuitry for actuating the rotor, and electronic control circuitry for controlling both the electronic power circuitry to control movement of the rotor and a discharge electric pump of the washing machine. An actuation system for a washing machine is also described, comprising a pulley electric motor for the actuation of a washing drum and a discharge electric pump for discharging water, controlled by the electronic control circuitry, the pulley electric motor equipped with electronic control circuitry which also controls the discharge electric pump. Also described is a washing machine comprising a housing body for a rotary washing drum, a pulley electric motor connected to the drum through a kinematic belt/pulley coupling, a discharge electric pump, and electronic control circuitry for controlling the pulley electric motor. The electronic control circuitry also controls the discharge electric pump.