# US 12,015,371 B2 · Device and method for over-current protection

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- Number: US 12,015,371 B2
- Document ID: US12015371B2
- Status: Granted
- Kind: B2
- Application number: 17/493,809
- Filed: 2021-10-04
- Published: 2022-01-27
- Granted: 2024-06-18
- Earliest claimed: 2018-07-02
- Assignees: Infinno Technology Corp.
- Applicants: Infinno Technology Corp.
- Inventors: Hui-Tsung Yang; Ming-Zhi Tzeng
- Web page: https://patentgrep.com/patent/US12015371B2

## CPC

- H02P 9/006: {Means for protecting the generator by using control (control effected upon generator excitation circuit to reduce harmful effects of overloads or transients H02P9/10)}
- H02H 9/02: responsive to excess current {(current limitation for voltage regulators G05F1/573; disconnection after limiting H02H3/025)}
- H02P 9/02: Details {of the control}
- H02P 29/027: {the fault being an over-current}
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)

## Abstract

An over-current protection device for a power generator includes a first pin, configured to receive a signal; a detection and control module, coupled to the first pin, and configured to detect the signal to determine whether the signal conforms to a pre-determined condition or not, and to output a control signal when the signal conforms to the pre-determined condition; and an auto-trim and memory module, coupled to the detection and control module, configured to receive the control signal from the detection and control module, wherein the auto-trim and memory module is configured to execute a plurality of auto-trim measurements and to store adjustment data corresponding to the plurality of auto-trim measurements; a second pin, coupled to the detection and control module, configured to receive a second signal.

## Claims

### Claim 1

An over-current protection device for a power generator, comprising:
a first pin, configured to receive a first signal;
a detection and control module, coupled to the first pin, and configured to detect the first signal to determine whether the first signal conforms to a pre-determined condition or not, and to output a control signal when the first signal conforms to the pre-determined condition; and
an auto-trim and memory module, coupled to the detection and control module, configured to receive the control signal from the detection and control module, wherein the auto-trim and memory module is configured to execute a plurality of auto-trim measurements and to store adjustment data corresponding to the plurality of auto-trim measurements;
a second pin, coupled to the detection and control module, configured to receive a second signal;
wherein the detection and control module detects a current signal according to a voltage difference between the first signal and the second signal to output the control signal when the first signal conforms to the pre-determined condition;
wherein the detection and control module detects a voltage level, a voltage waveform, a voltage frequency or a voltage duty cycle of the first signal at a predetermined period to determine whether the first signal conforms to the pre-determined condition or not;
wherein the first pin is directly coupled the power generator, and the second pin is directly coupled to the power generator and a load signal generator;
wherein the first signal and the second signal are corresponding to a load signal generated by the load signal generator.

### Claim 2 (depends on 1)

The over-current protection device of claim 1, wherein the control signal is a working mode related to the power generator, wherein the working mode is an on setting, an off setting, or an over-current protection point setting of the power generator.

### Claim 3 (depends on 1)

The over-current protection device of claim 1, wherein when the power generator comprises a plurality of power supplying modules, the detection and control module outputs the control signal to the auto-trim and memory module to determine working modes corresponding to the plurality of power supplying modules, wherein the working modes are an on setting, an off setting, or an over-current protection point setting of the plurality of power supplying modules.

### Claim 4

An over-current protection method for a power generator, comprising:
receiving a first signal from a first pin and a second signal from a second pin;
detecting a voltage level, a voltage waveform, a voltage frequency, a voltage duty cycle, a current size, a current frequency or a current variation cycle of the first signal by a detection and control module to determine whether the first signal conforms to a predetermined condition or not;
outputting a control signal from an auto-trim and memory module, when the first signal conforms to the pre-determined condition; and
executing a plurality of auto-trim measurements and storing adjustment data corresponding to the plurality of auto-trim measurements according to the control signal;
wherein the detection and control module detects a current signal according to a voltage difference between the first signal and the second signal to output the control signal when the first signal conforms to the pre-determined condition;
wherein the first pin is directly coupled to the power generator, and the second pin is directly coupled to the power generator and a load signal generator;
wherein the first signal and the second signal are corresponding to a load signal generated by the load signal generator.

### Claim 5 (depends on 4)

The over-current protection method of claim 4, further comprising:
detecting a current signal of the first signal and outputting the control signal when the first signal conforms to the pre-determined condition.

### Claim 6 (depends on 5)

The over-current protection method of claim 5, further comprising:
detecting the voltage level, the voltage waveform, the voltage frequency or the voltage duty cycle of the first signal at a predetermined period to determine whether the first signal conforms to the pre-determined condition or not.

### Claim 7 (depends on 4)

The over-current protection method of claim 4, wherein the control signal is a working mode related to the power generator, wherein the working mode is an on setting, an off setting, or an over-current protection point setting of the power generator.