Parallel Winding Motor Control via Segmented Branches

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Solution Overview

Problem

High-power motor control is challenging due to limited availability and high cost of suitable high-power components, and existing methods of connecting power components in parallel series are impacted by inconsistency in current distribution.

Innovation Solution

A high-power motor design with windings of multiple phases, each comprising n winding branches connected in parallel and controlled by 2n independent power components, allowing asymmetric or symmetric configurations to ensure reliable and cost-effective control without requiring equal current distribution across components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If high-power components are used to control high-power motors, then the motor control capability is improved, but the cost and availability issues worsen

Engineering Contradiction:

Improvemotor control capabilityVSAvoidcost and availability

Core Design Contradiction:

PowerVSEase of manufacture

Solution Approach 1:

The patent divides the high-power motor control system into multiple parallel winding branches (n branches), each controlled by separate low-power components. This segmentation allows the use of multiple affordable low-power components instead of a single expensive high-power component, resolving the contradiction between control capability and cost/availability.

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If power components are connected in parallel series to control high-power motors, then the cost is reduced, but the current distribution consistency deteriorates

Engineering Contradiction:

ImprovecostVSAvoidcurrent distribution consistency

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent segments the winding system into n independent parallel branches, with each branch having its own dedicated power components. This segmentation ensures that current distribution issues are isolated to individual branches rather than affecting the entire system, improving reliability while maintaining cost benefits.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements independent control of each parallel winding branch through separate power components, allowing dynamic adjustment of current distribution. This dynamic control capability enables the system to compensate for component inconsistencies and maintain reliable operation, resolving the reliability concern.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If multiple independent power components are used for each phase, then the control flexibility is improved, but the device complexity increases

Engineering Contradiction:

Improvecontrol flexibilityVSAvoidnumber of power components

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs each parallel winding branch with identical structural configuration, allowing the same control architecture to be universally applied across all n branches. This modular universal design provides control flexibility for different operating conditions while avoiding the complexity increase that would result from custom designs for each branch.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11251671B2High-power motor controlled by parallelly connected windings

Publication Date: 2022.02.15 BIJIE TIANYU POWER TECH

AI summary

A high-power motor controlled by parallelly connected windings is provided. The motor comprises multi-phase windings. Each phase includes n winding branches and 2n power devices, wherein the n winding branches are connected in parallel with each other, and each winding branch is independently controlled by a power device.