GaNFET Solenoid Controller PCB Integration
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Solution Overview
Problem
Existing constant-current controllers for inductive loads, such as solenoids, are difficult and costly to retrofit into electromechanical devices due to their large size and rigidity, which requires them to be mounted remotely, making integration with the solenoid driver challenging.
Innovation Solution
A compact constant-current controller circuit using a Gallium Nitride FET (GaNFET) as the primary switch, integrated onto a Printed Circuit Board (PCB) that can be mounted directly with the solenoid driver, allowing for a smaller, flexible PCB that can be easily integrated into the solenoid assembly, enabling a drop-in replacement for standard solenoids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a MOSFET-based constant-current controller is used, then constant current control is achieved, but the PCB size becomes large and rigid, making integration with the solenoid driver difficult
Solution Approach 1:
The patent changes the key parameter of the switching device from MOSFET to GaNFET (Gallium Nitride Field Effect Transistor). This parameter change results in a significant reduction of the PCB size while maintaining the constant current control function, thereby resolving the contradiction between achieving reliable constant current control and enabling easy integration with the solenoid driver
Solution Approach 2:
The patent substitutes the mechanical/electrical component (MOSFET) with an advanced semiconductor device (GaNFET) that has superior electrical characteristics and smaller physical dimensions. This substitution enables the PCB to be both compact and flexible, making it easy to integrate with the solenoid driver while maintaining constant current control functionality
2Reliability
If a MOSFET-based constant-current controller is used, then constant current control is achieved, but the PCB size becomes large and rigid, increasing manufacturing complexity and cost
Solution Approach 1:
The patent changes the switching device parameter from MOSFET to GaNFET, which fundamentally alters the PCB size and flexibility characteristics. This parameter change simplifies the manufacturing process by enabling direct integration of the PCB with the solenoid driver, eliminating the need for separate mounting and reducing assembly complexity
Solution Approach 2:
The patent merges the constant-current controller PCB with the solenoid driver assembly into a single integrated unit. The compact GaNFET-based PCB can be directly mounted on or integrated with the solenoid driver, combining two previously separate components into one unified assembly, thereby simplifying manufacturing and reducing overall system complexity
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 allows for efficient and cost-effective integration of constant-current control into electromechanical devices, improving power management and efficiency by enabling precise control of current flow, reducing the size and complexity of the PCB, and facilitating easy retrofitting of existing devices.
Implementation Method 1
a solenoid driver including a coil and a GaNFET operable to switch current flow through the coil
Implementation Method 2
the solenoid driver is integrated with and made part of the solenoid assembly... When power is applied to the solenoid, the solenoid is powered away from the default state
Data Source
AI summary
A constant-current controller that supplies a constant-current to a solenoid driver for use with an electromechanical device. The controller comprises a PCB containing a constant-current control circuit. The circuit comprises a GaNFET primary switch and a secondary switch. The PCB is integrated with and made a part of the solenoid driver. A standard electromechanical device may be converted to a constant-current controlled electromechanical device by exchanging the solenoid driver.