Adaptive Gate Driver Pulses to Limit Switching Spikes
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Solution Overview
Problem
Power converters face reliability issues due to voltage and current spikes, which can exceed the maximum rated voltage of switches, leading to reduced reliability and increased electromagnetic interference.
Innovation Solution
The use of sensor measurements and rules to determine the gate driving strength of switches in power devices, ensuring that the maximum rated voltage is not exceeded by adjusting the gate driving pulse strength based on measured parameters such as voltage, current, and temperature, thereby preventing spikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If strong gate driving pulses are used to activate the switch, then switching speed is improved, but voltage and current spikes increase which can exceed maximum rated voltage
Solution Approach 1:
The gate driver dynamically adjusts its driving strength based on real-time measurement of voltage and current parameters. The controller modifies the gate pulse characteristics (amplitude, width, shape) according to the measured electrical parameters, enabling the system to achieve fast switching when conditions permit while preventing voltage and current spikes from exceeding maximum rated values under critical conditions.
Solution Approach 2:
The system implements a feedback mechanism where sensors continuously measure voltage and current parameters during switch operation. These measurements are fed back to the controller, which then adjusts the gate driving pulse strength accordingly. This closed-loop control ensures that switching performance is optimized while maintaining voltage and current within safe operating limits.
2Productivity
If gate driving pulse strength is increased to improve switching performance, then productivity is improved, but electromagnetic interference increases
Solution Approach 1:
The gate driver dynamically adjusts its driving strength based on real-time measurement of voltage and current parameters. The controller modifies the gate pulse characteristics (amplitude, width, shape) according to the measured electrical parameters, enabling the system to achieve fast switching when conditions permit while preventing voltage and current spikes from exceeding maximum rated values under critical conditions.
Solution Approach 2:
The system implements a feedback mechanism where sensors continuously measure voltage and current parameters during switch operation. These measurements are fed back to the controller, which then adjusts the gate driving pulse strength accordingly. This closed-loop control ensures that switching performance is optimized while maintaining voltage and current within safe operating limits.
3Reliability
If gate driving pulse strength is dynamically adjusted based on measured parameters, then reliability is improved, but device complexity increases
Solution Approach 1:
The system introduces an intermediary controller that sits between the gate driver and the switch. This controller receives measurement data from sensors, processes the information according to predetermined rules or algorithms, and generates appropriate gate driving pulses. The intermediary manages the complexity by centralizing the decision-making logic while keeping the actual gate driver circuitry relatively simple.
Solution Approach 2:
The system replaces complex mechanical or hardware-based protection mechanisms with an electronic control approach. Instead of using multiple discrete protection circuits and components, the invention uses a software-based or logic-based controller that dynamically adjusts gate driving parameters. This substitution reduces hardware complexity while achieving the same or better reliability outcomes.
Data Source
AI summary
A driver for improving reliability of a switch in a power device, comprising one or more sensors configured to sense an operational parameter of a power device. The driver comprises a controller configured to receive one or more sensor values from the respective sensors. The controller is configured to adjust a driving pulse according to the sensor values. The controller is configured to apply the driving pulse to one or more control terminal of one or more switch of the power device.