Electric leakage protection electronic rectifier and lamp with electric leakage protection electronic rectifier

Patent metadata

Field	Value
Publication number	US-10645784-B1
Application number	US-201916512313-A
Country	US
Kind code	B1
Filing date	Jul 15, 2019
Priority date	Mar 22, 2019
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

The invention discloses an electric leakage protection electronic rectifier and a lamp with an electric leakage protection electronic rectifier. The electric leakage protection electronic rectifier including a leakage detecting module and a driving module. The driving module has a current-limiting control unit. The current-limiting control unit is electrically connected between the leakage detecting module and a lamp's light-emitting module. When used, the leakage detecting module detects whether power supply is leaked, and the current-limiting control unit limits the output current to avoid the current output exceeding the tolerable range of the lamp. Such that the invention prolongs the service life of lamps and prevents a current leakage from the lamp.

First claim

What is claimed is:

1. An electric leakage protection electronic rectifier comprising:
a leakage detecting module connecting with a power supply; and
a driving module comprising a Type A+B driving circuit and being electrically connected with the leakage detecting module, and having a current-limiting control unit being set in the Type A circuit of the driving module to limit the current and being electrically connected with the leakage detecting module;
wherein the current-limiting control unit detects the output current of the power supply, when the current-limiting control unit detecting the output current of the power supply exceeding a reference signal, the current-limiting control unit limits the output current of the power supply.

2. The electric leakage protection electronic rectifier as claimed in claim 1 , wherein the leakage detecting module includes a rectifier connected to a power supply.

3. The electric leakage protection electronic rectifier as claimed in claim 2 , wherein the current-limiting control unit further includes a voltage input unit, a filter, a reference signal sampling circuit, a comparator and a switch unit, the comparator has many pins connecting with the filter, the reference signal sampling circuit and the switch unit.

4. The electric leakage protection electronic rectifier as claimed in claim 3 , wherein
the voltage input unit is connected with the filter and provides a voltage drop signal being filtered by the filter;
the filter sends a filtered signal to the comparator; and
the reference signal sampling circuit provides a reference signal to the comparator as the reference signal of the current-limiting control unit.

5. The electric leakage protection electronic rectifier as claimed in claim 4 , wherein when the comparator receives the filtered signal from the filter and the reference signal from the reference signal sampling circuit, the comparator outputs a control signal to the switch unit according to the filtered signal exceeding the reference signal;
when the switch unit is controlled, a waveform of the input voltage is lowered or partially cut off, so as to limit an output current.

6. The electric leakage protection electronic rectifier as claimed in claim 5 , wherein the switch unit comprises a MOS switch connected to the rectifier of the leakage detecting module.

7. The electric leakage protection electronic rectifier as claimed in claim 6 , wherein:
the voltage input unit comprises a first resistor and a second resistor connected together;
the filter comprises a third resistor and a first capacitor being connected together in series, and a connection portion of the third resistor and the first capacitor is connected with the comparator;
the reference signal sampling circuit comprises a fourth resistor, a fifth resistor and a sixth resistor, a diode and a second capacitor;
wherein the comparator is respectively connected with a connection portion of the fourth resistor and the second capacitor, and a connection portion of the fifth resistor and the diode; and
the comparator is connected with a connection portion of the fifth resistor and the sixth resistor.

8. A lamp comprising:
a body connecting with a power supply;
a leakage detecting module arranged in the body and connected with the power supply;
a light emitting module being arranged in the body;
a driving module comprising a Type A+B driving circuit and being electrically connected with the leakage detecting module, and having a current-limiting control unit being set in the Type A circuit of the driving module to limit the current and being electrically connected with the leakage detecting module;
wherein the current-limiting control unit detects the output current of the power supply, when the current-limiting control unit detecting the output current of the power supply exceeding a reference signal, the current-limiting control unit limits the output current of the power supply.

9. The lamp as claimed in claim 8 , wherein the light-emitting module is an LED light emitting module.

Assignees

• Xiamen Pvtech Co Ltd

Inventors

• Lu Fuxing
• Liu Rongtu

Classifications

• H02H9/02

  responsive to excess current {(current limitation for voltage regulators G05F1/573; disconnection after limiting H02H3/025)} · CPC title

• H02M7/217 Primary

  using semiconductor devices only · CPC title

• H05B45/50 Primary

  responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits · CPC title

• H05B45/00

  Circuit arrangements for operating light-emitting diodes [LED] · CPC title

• H02H9/08

  Limitation or suppression of earth fault currents, e.g. Petersen coil · CPC title