Electrical Machine Concentrated Windings Power Electronics Integration
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Solution Overview
Problem
Existing electrical machines with distributed windings offer high performance but are costly to produce due to complex manufacturing processes.
Innovation Solution
The design replaces distributed windings with concentrated windings, integrating power-electronics components between annular conductors, allowing for a compact and cost-effective structure with reduced production expenses by eliminating the need for separate converters and cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed windings are used, then electromagnetic performance is improved with lower harmonics and reduced rotor losses, but manufacturing complexity and production cost increase significantly
Solution Approach 1:
The patent applies segmentation by dividing the stator winding into multiple independent concentrated winding sections, each supplied by separate power-electronics components. This allows the use of simpler concentrated windings instead of complex distributed windings, while maintaining good electromagnetic performance through modular segmentation of the stator into multiple pole pairs with independent winding sections.
2Reliability
If distributed windings are used, then electromagnetic performance is improved, but production expense increases due to elaborate production processes
Solution Approach 1:
The patent employs simpler, more cost-effective concentrated windings instead of expensive distributed windings. The concentrated windings are easier and cheaper to manufacture, and the modular design with independent winding sections allows for simplified production processes while maintaining adequate electromagnetic performance for the application.
3Volume of moving object
If power-electronics components are integrated between annular conductors, then device compactness is improved and separate converters are eliminated, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges the power-electronics components directly with the annular conductors in the stator assembly, eliminating the need for separate converter units and external cable connections. This integration creates a compact structure where the power-electronics components are positioned between the annular conductors, reducing overall device volume and simplifying the external configuration.
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 solution achieves a compact, low-cost electrical machine with reduced production expenses and improved electromagnetic compatibility, maintaining high performance with lower rotor losses and noise.
Implementation Method 1
The stator has windings that can be connected to an electrical system... The main advantage of distributed windings is that the magnetomotor force in the air gap between stator and rotor has a lower content of higher harmonics
Implementation Method 2
A power-electronics component preferably comprises at least one semiconductor switch, a driver circuit for the semiconductor switch and at least one capacitor
Data Source
AI summary
The present invention relates to an electrical machine having a stator. The stator comprises a plurality of slots for receiving a stator winding. One respective conductor section of the stator winding is inserted into each slot. The conductor sections of at least one pair of poles are short-circuited to one another on a first side of the stator. The conductor sections on a second side of the stator, opposite from the first side, are each connected to a terminal of a power supply unit. The power supply unit consists of two annular electrical conductors, between which at least one power-electronics component is arranged.