Electric Machine Segmented Stator Coils for Efficiency
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Solution Overview
Problem
Existing electric machines, such as commutator and brushless motors, operate inefficiently as they do not utilize all coils at full capacity simultaneously, leading to suboptimal performance and reduced power due to anti-induction issues with alternating current.
Innovation Solution
The electric machine features a rotor and stator with radial and/or tangential coils connected in series or back-to-back, controlled by a device that dynamically connects and disconnects coils to create a predetermined stator magnetic field, allowing for efficient rotation or reciprocating motion and optimizing magnetic flux and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If phase machines supply maximum electric current to one phase at a time, then the rotor turns by a certain angle, but not all coils operate at full capacity leading to reduced efficiency
Solution Approach 1:
The stator winding is segmented into multiple independent coils with terminals, allowing selective activation. The control device can connect to different coil terminals to activate specific coils based on rotor position, enabling multiple coils to operate simultaneously at full capacity rather than sequentially, thus improving efficiency and energy utilization.
Solution Approach 2:
The control device dynamically connects and disconnects coils based on the spatial position and magnetic condition of the rotor. This dynamic configuration allows the system to optimize which coils are active at any given moment, ensuring maximum energy utilization and preventing energy waste from coils operating below capacity.
2Power
If alternating electrical current is used, then the machine can operate continuously, but the power is smaller by a square root of two due to anti-induction
Solution Approach 1:
The invention changes the electrical parameter from alternating current to direct current operation. By using direct current with full load on all winding coils, the anti-induction effect is eliminated, increasing power output by a factor of square root of two compared to alternating current operation, while reducing energy loss.
3Productivity
If a control device is added to enable chain control of electric current supply, then specific power and efficiency increase, but device complexity increases
Solution Approach 1:
The coils are pre-configured with terminals that allow direct connection to the control device. The control device stores positional information about rotor location and pre-determines which coils should be activated, eliminating the need for complex real-time calculations and reducing control system complexity while maintaining high specific power and efficiency.
4Power
If radial and tangential coils are connected in series and back-to-back, then magnetic flux optimization is achieved, but manufacturing complexity increases
Solution Approach 1:
The coil system is segmented into modular radial and tangential coils that can be independently manufactured and then assembled. Each coil type is standardized with specific connection terminals, allowing for simplified mass production and assembly while achieving the optimized magnetic flux configuration through the back-to-back series connection of these modular units.
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 configuration enhances specific power and efficiency, enabling a wide range of applications by maintaining constant torque and reducing energy consumption, while allowing for variable frequency and motion control, thus overcoming the limitations of existing machines.
Implementation Method 1
The stator contains a magnetically soft core and radial and/or tangential stator coils... the control device selects and connects... with the specified coils... to generate a rotating magnetic field of the stator depending on the position of the rotor
Implementation Method 2
The rotor consists of a two-magnetic-pole core... or a magnetically soft core with two segments... or made of magnetically soft steel with permanent magnets inserted in bores... making the core of the rotor a whole a permanent magnet
Data Source
AI summary
The invention belongs to the category of electric motors and power generators, and may expand the area of application, reduce costs, and increase the specific power and efficiency of electric machines. These electric machine comprise a rotor and a stator with winding coils and a control device. Stator winding coils are made as a system of radial and/or tangential coils connected in series and/or back-to-back; each coil has its own electric terminals. The control device connects its electric contacts with terminals of corresponding stator winding coils in order to provide a chain control of electric current supply to the corresponding stator coils and to create, at each point in time, a pre-determined stator magnetic field including a rotating or a reciprocating stator magnetic field, depending on the spatial position and the magnetic condition of the rotor. The invention can be applied to various fields of technology.