Isolated Power Supply Circuit Single Source Multiple Grounds

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Solution Overview

Problem

Traditional methods of using separate power sources for electrical circuits coupled to different reference grounds increase the cost and volume of electrical systems.

Innovation Solution

An isolated power supply circuit that uses a single power source with inverter and conversion circuits to supply power to multiple receiving circuits isolated from each other, including a first reference ground, a second reference ground, a power source, a first inverter circuit, a second inverter circuit, and an isolated conversion circuit to isolate the reference grounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate power sources are used for each electrical circuit coupled to different reference grounds, then the isolation between reference grounds is maintained, but the cost and volume of the electrical system increase

Engineering Contradiction:

Improveisolation between reference groundsVSAvoidvolume of electrical system

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent merges multiple power sources into a single power source that serves multiple receiving circuits coupled to different reference grounds. The isolated conversion circuit enables this single power source to provide isolated power to multiple circuits that require different reference grounds, thereby reducing the overall volume and component count while maintaining the necessary isolation between reference grounds through the isolated conversion circuit.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

Engineering Contradiction:

Improveisolation between reference groundsVSAvoidcost of electrical system

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines multiple power sources into one shared power source that supplies power to multiple receiving circuits through an isolated conversion circuit. This consolidation reduces the total component count and system cost while maintaining the required isolation between different reference grounds through the isolated conversion functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The isolated conversion circuit serves multiple functions: it converts power from the single power source, provides isolation between different reference grounds, and enables multiple receiving circuits to operate independently on different grounds. This multi-functionality eliminates the need for separate dedicated power sources for each circuit, reducing overall system cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Volume of stationary object

If a single power source is used to supply power to multiple receiving circuits with isolated reference grounds, then the cost and volume are reduced, but the isolation between reference grounds must be maintained

Engineering Contradiction:

Improvevolume of electrical systemVSAvoidisolation between reference grounds

Core Design Contradiction:

Volume of stationary objectVSReliability

Solution Approach 1:

The isolated conversion circuit acts as an intermediary between the single power source and multiple receiving circuits with different reference grounds. It mediates the power distribution while maintaining the necessary isolation between grounds, enabling a single power source to serve multiple isolated circuits without compromising the isolation requirement.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Volume of stationary object

If a single power source is used to supply power to multiple receiving circuits with isolated reference grounds, then the cost and volume are reduced, but the system complexity increases

Engineering Contradiction:

Improvevolume of electrical systemVSAvoidcomplexity of power supply circuit

Core Design Contradiction:

Volume of stationary objectVSDevice complexity

Solution Approach 1:

The isolated conversion circuit serves as a mediator that simplifies the overall system architecture by replacing multiple separate power sources with a single consolidated power supply. While the isolated conversion circuit itself adds complexity, it eliminates the need for multiple independent power source assemblies, control circuits, and isolation components, resulting in a net reduction of overall system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10622880B2Isolated power supply circuit and associated control method

Publication Date: 2020.04.14 CHENGDU MONOLITHIC POWER SYST

AI summary

An isolated power supply circuit has a first reference ground, a second reference ground, a power source, a first receiving circuit, a second receiving circuit, a first inverter circuit, a second inverter circuit and an isolated conversion circuit. The first reference ground and the second reference ground are isolated from each other. The first receiving circuit is coupled to the first reference ground. The second receiving circuit is coupled to the second reference ground. The power source provides a first power signal for the first receiving circuit directly. The first inverter circuit and the second inverter circuit receive the first power signal and produce a first inverter signal and a second inverter signal. And the isolated conversion circuit outputs a second power signal to the second receiving circuit based on the first inverter signal and the second inverter signal.