Refrigerator Motor Start Control Without Extra Excitation Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing motor control systems for refrigerators are complex due to the need for an extra excitation control circuit to manage the exciting coil, increasing system complexity and component construction requirements.
Innovation Solution
A motor control apparatus and method that uses a refrigerator control unit to output control signals for the application time of excitation current, eliminating the need for an extra excitation control circuit by integrating the control of the exciting coil with a main coil, auxiliary coil, and a switch unit, and adjusting based on the presence of a starting capacitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an extra excitation control circuit is installed to control the exciting coil, then the motor can be properly excited and magnetized, but the system complexity and component construction increase
Solution Approach 1:
The patent combines the excitation control circuit with the existing refrigerator control unit, merging two separate control functions into a single integrated controller. This eliminates the need for a separate excitation control circuit while maintaining proper motor excitation control through shared control resources.
Solution Approach 2:
The refrigerator control unit is designed to perform multiple functions including both the original refrigerator control tasks and the new motor excitation control. By making the control unit universal and multi-functional, the patent reduces overall system complexity while maintaining all necessary control capabilities.
2Ease of operation
If a separate excitation control circuit is used, then precise control of the exciting coil is achieved, but the number of components and construction complexity increase
Solution Approach 1:
The control signals for the exciting coil are generated and managed within the existing refrigerator control unit, merging the excitation control functionality with the main control architecture. This integration maintains ease of operation through centralized control while reducing component construction complexity by eliminating separate control circuits.
Solution Approach 2:
The refrigerator control unit serves itself by handling both the refrigerator control tasks and the motor excitation control tasks within a single integrated system. This self-service approach eliminates the need for external or separate control circuits, simplifying the overall system while maintaining operational effectiveness.
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 simplifies the component construction and reduces complexity by enabling the magnetic material in the rotor to be magnetized using the refrigerator control unit, enhancing the motor's starting torque and reducing system complexity without an extra excitation control circuit.
Implementation Method 1
an exciting coil that generates an excitation current
Implementation Method 2
power is applied to the main winding and the auxiliary winding of the stator 20 of the motor, according to which the rotor 40 is rotated
Data Source
AI summary
An apparatus and method for controlling starting of a motor are disclosed. An exciting coil of a motor is excited by using a controller of an electronic refrigerator without having an extra excitation control circuit, to thereby simplify a component construction for controlling exciting of the motor and thus reduce complexity. The present invention includes: a main coil and an auxiliary coil (sub-coil); an exciting coil that generates an excitation current; a refrigerator control unit that outputs a control signal for controlling an application time of the excitation current when started; and a switch unit electrically connected with the exciting coil and supplying power to the exciting coil according to the control signal outputted from the refrigerator control unit.