Switched Mode Power Supply with Independent Secondary Control
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Solution Overview
Problem
Existing switched mode power supplies in motor drives have limited flexibility in controlling electrical power output, as their structure is generally fixed, restricting their use in varying motor drives with different power ratings and operational requirements.
Innovation Solution
The implementation of a switched mode power supply with a primary coil that stores energy and a secondary coil that outputs power, where a secondary controller independently controls the electrical power by varying the connection time to the power output, allowing for independent control of voltage and current at each power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switched mode power supply uses a fixed structure with a single control loop, then the manufacturing and certification process is simplified, but the flexibility in controlling electrical power output is limited
Solution Approach 1:
The patent divides the power supply structure into multiple independent secondary circuits, each with its own controller and control loop. This segmentation allows each circuit to independently control electrical power output, providing flexibility while maintaining a modular structure that can be manufactured and certified as a unified system.
Solution Approach 2:
The patent implements dynamic control by allowing each secondary circuit to independently adjust its output based on real-time conditions. The multiple control loops enable the system to dynamically respond to varying power requirements, transforming the fixed structure into a dynamically adaptable system.
2Adaptability or versatility
If a switched mode power supply has a fixed structure, then it is easier to manufacture and certify, but it cannot accommodate varying power ratings in different motor drives
Solution Approach 1:
The patent creates a universal power supply design where multiple secondary circuits can serve different power rating requirements. The same basic structure with multiple controllable circuits can be configured for various motor drive applications, reducing the need for separate certified designs for each power rating.
Solution Approach 2:
The patent enables parameter changes by allowing independent control of each secondary circuit's output characteristics. By adjusting control parameters in each circuit, the power supply can accommodate different power ratings without changing the physical structure, thus maintaining ease of manufacture and certification.
3Ease of operation
If electrical power output is fixed to primary side operation, then the power supply structure remains simple, but independent control of voltage and current at each output is prevented
Solution Approach 1:
The patent segments the control function by providing each secondary circuit with its own controller and control loop. This allows independent control of voltage and current at each output without requiring complex interdependent control mechanisms, as each segment operates autonomously.
Solution Approach 2:
The patent implements feedback control in each secondary circuit, allowing independent regulation of voltage and current outputs. Each control loop uses feedback from its respective output to maintain desired parameters, enabling precise independent control while managing complexity through modular feedback mechanisms.
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 approach enhances the operational flexibility of switched mode power supplies, enabling structurally identical power supplies to be used in different motor drives with varying power ratings, reducing certification barriers and accommodating changes in circuitry over time.
Implementation Method 1
a primary coil, in which a primary controller stores electrical energy in the primary coil by selectively connecting the primary coil to a power source
Implementation Method 2
a secondary coil electrically isolated from the primary coil, in which the secondary coil outputs electrical power based at least in part on the electrical energy stored in the primary coil
Data Source
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AI summary
The embodiments described herein include one embodiment that provides a motor drive that includes driver circuitry that controls operation of an inverter in the motor drive to output power to a motor, control circuitry that controls operation of the driver circuitry, and a switched mode power supply that supplies electrical power to the driver circuitry, the control circuitry, or both. The switched mode power supply includes a primary coil, in which a primary controller stores electrical energy in the primary coil by selectively connecting the primary coil to a power source, and a secondary coil electrically isolated from the primary coil, in which the secondary coil outputs electrical power based at least in part on the electrical energy stored in the primary coil, in which a secondary controller controls the electrical power supplied to the driver circuitry, the control circuitry, or both by selectively connecting the secondary coil to a power output of the switched mode power supply.