Inverter Circuit Overcurrent Protection Method
Summary
The USPTO has published a patent application detailing a control method for an inverter circuit that triggers overcurrent protection. The application, filed by Dong WU et al., describes a system that stops outputting a first drive signal and outputs a third drive signal when an overcurrent condition is detected.
What changed
This document is a patent application (US20260088710A1) from the USPTO, filed on December 5, 2025, and published on March 26, 2026. It describes a specific control method for an inverter circuit, particularly a T-type three-level inverter, designed to trigger overcurrent protection. The method involves detecting when the output current exceeds a preset threshold and, if not already in an overcurrent protection state, initiating that state. Upon entering the protection state, the system stops a primary drive signal and outputs an alternative signal to ensure specific switch transistors are off and other bridge arms are controlled.
While this is a patent application and not a regulation imposing direct compliance obligations, it represents a technological innovation in power supply control. Companies involved in manufacturing inverters, power conversion apparatus, or energy storage devices may find this technology relevant for product development and intellectual property considerations. Compliance officers in the manufacturing sector should be aware of such technological advancements as they may influence future product design and industry standards, particularly concerning safety features like overcurrent protection.
Source document (simplified)
CONTROL METHOD FOR INVERTER CIRCUIT, POWER CONVERSION APPARATUS, AND ENERGY STORAGE DEVICE
Application US20260088710A1 Kind: A1 Mar 26, 2026
Inventors
Dong WU, Xi CHEN, Lei WANG, Longbo LU
Abstract
A control method for an inverter circuit is provided. When an output current of a T-type three-level inverter circuit is greater than a preset threshold and the circuit is not in an overcurrent protection state, the overcurrent protection state is triggered. When the circuit is in the overcurrent protection state, outputting of a first drive signal is stopped, and a third drive signal is outputted, so that a first switch transistor and a second switch transistor in a first bridge arm are in an off state due to not receiving the first drive signal, and a second bridge arm is alternately turned on due to receiving the third drive signal.
CPC Classifications
H02M 1/344 H02J 7/62 H02J 7/855 H02M 1/0009 H02M 7/5387
Filing Date
2025-12-05
Application No.
19410117
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