Electric Machine

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This invention describes an improved electrical machine (such as a motor or generator) that combines two differently structured windings: a meandering air gap winding and a slot winding, both placed on or inside the main iron core (stator/primary part). The secondary part (rotor or armature) carries alternating magnetic poles and is separated from the primary part by an air gap. The design improves force or torque output, efficiency, cooling, and compactness, using less material and providing new avenues for control and optimization.

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• Electric vehicle propulsion systems (e.g., cars, bikes, scooters, boats, aircraft)
• Industrial motors where high torque and efficiency are required
• Compact and lightweight motors in robotics and automation
• Generators for renewable energy systems where size and efficiency are important
• Actuators in aerospace applications demanding low weight and high performance
• High-performance linear motors for transport, positioning, or conveyance systems

BenefitsContent extracted from patent full text and abstract with AI.

• Significantly higher torque and power output compared to single-winding machines
• Very compact and lightweight construction due to efficient use of iron and copper
• Superior cooling of windings, allowing for higher performance and reliability
• Flexibility in operating with direct or alternating current, or mixed modes
• Increased efficiency at high rotational speeds due to reduced field weakening
• Easily scalable design for different power levels and applications
• Manufacturing cost increases are minimal compared to the performance improvements
• Simple geometric structure allows for easier production and customization
• Versatile application possibilities in both rotational and linear motor designs
• Adaptable winding and slot ratios for tailored performance in specific applications

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

An electrical machine (1) has a primary part (2), a secondary part (3) and an air gap (6) between said primary part and secondary part, an air gap winding (4) with two phases (4a, 4b) being arranged on an iron core (7) of the primary part in the said air gap. Magnetic poles (9) alternate on an iron core (10) of the secondary part. A magnetic circuit (11) runs via two poles (9a, 9b), the iron core in the secondary part, the air gap (6) twice and the iron core in the primary part. For each pole and each phase (4a, 4b), a winding phase (12a, 12b) lies perpendicular to a magnetic flux density (11a, 11b) in the air gap. Alternating head pieces (12c, 12d) connect adjacent winding phases of a phase of the air gap winding to form a conductor. The primary part has a slot winding (5) with two phases (5a, 5b) in slots (8) of the iron core (7). For each pole and each phase (5a, 5b), a winding phase lies parallel to the winding phase of the air gap winding which is associated with the same pole. Alternating head pieces (14c, 14d) connect adjacent winding phases (14a, 14b) of a phase (5a, 5b) of the slot winding to form a conductor. The winding phases (12a, 12b) of the first phase (4a) of the air gap winding have a position offset (a), which is determined by the number of phases, in relation to the winding phases (14a, 14b) of the first phase (5a) of the slot winding. The air gap winding and the slot winding can be operated by an activation which is alternately synchronized with the position of the magnetic pole (9).