DC Motor Current Direction Controller Integration
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Solution Overview
Problem
Conventional DC motors with external current direction controllers are bulky, require extensive sealing and insulation, leading to increased costs, complex operations, and higher maintenance due to numerous wires and connection points, which also result in higher power consumption and susceptibility to damage.
Innovation Solution
The current direction controller is integrated inside the motor, with carbon brushes and contactors positioned on a brush holder enclosed by a cover, reducing the number of wires and connection points, and eliminating the need for external sealing and insulation, resulting in a compact design with lower power consumption and improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the current direction controller is disposed outside the motor, then the controller can be easily accessed for maintenance, but the motor volume increases and the structure becomes bulky
Solution Approach 1:
The current direction controller is integrated inside the motor shell, merging the controller and motor into a single compact unit. This eliminates the need for separate external controller mounting, reducing overall volume while maintaining functionality through internal wire connections to the carbon brushes and exciting coil terminals
2Ease of repair
If the current direction controller is disposed outside the motor, then the controller can be independently replaced, but the number of wires and connection points increases, leading to higher power consumption and more sealing requirements
Solution Approach 1:
The controller is integrated within the motor, sharing the same shell and internal space. The wires connecting the controller to the carbon brushes and exciting coil are contained within the motor interior, eliminating external connection points and reducing the need for external sealing and insulation
Solution Approach 2:
The current direction controller is nested inside the motor shell, with the controller components housed within the existing motor structure. This nesting approach allows the controller to be protected by the motor's own shell, reducing additional sealing requirements
3Reliability
If the controller is enclosed with extensive sealing and insulation, then the external components are protected from damage, but the manufacturing workload and cost increase
Solution Approach 1:
The controller shares the motor's protective shell and internal environment, eliminating the need for separate external sealing and insulation structures. The motor's own protective features extend to cover the internally-mounted controller, reducing manufacturing complexity
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 design enhances the motor's compactness, reduces manufacturing workload and costs, improves operating efficiency, and simplifies maintenance by minimizing the risk of damage to the current direction controller and its components.
Implementation Method 1
a main magnetic pole and an exciting coil... a permanent magnet... The current flows from the power supply to the exciting coil through the first and second carbon brushes, the first and second contactors, and the first and second terminals
Data Source
AI summary
A DC motor including a stator which includes a shell, a main magnetic pole and an exciting coil; a rotator disposed inside the stator; a brush holder disposed at an end of the shell; first and second carbon brushes disposed on the brush holder and contacted with the rotator respectively; a current direction controller disposed on the brush holder and connected with the first and second carbon brushes and first and second ends of the exciting coil respectively so as to control a direction of a current supplied to the exciting coil; and a cover disposed at the end of the shell so as to enclose the brush holder. The motor according to the present invention is compact in structure, small in volume, and occupies a small mounting space, and the work load of sealing and insulating is reduced, thus reducing the cost and improving the manufacture efficiency.