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US 2016/0105015 A1Published application
Ground detecting apparatus and relay action detecting apparatus
AssigneeDelta Electronics, Inc.
InventorMing-Whang WANG
Life of this patent
Estimating the term…
Abstract
A ground detecting apparatus at least includes a metal oxide semiconductor field effect transistor and a high voltage resistor. The metal oxide semiconductor field effect transistor is used to replace a photo-coupler for switching. The high voltage resistor is used for safety isolation. A relay action detecting apparatus at least includes a metal oxide semiconductor field effect transistor and a high voltage resistor. The metal oxide semiconductor field effect transistor is used to replace a photo-coupler for switching. The high voltage resistor is used for safety isolation.
Claims18
A ground detecting apparatus electrically connected to an alternating current power supply apparatus, the ground detecting apparatus comprising:
- a diode unit electrically connected to the alternating current power supply apparatus and generating a direct current voltage;
- a high voltage resistor comprising a first terminal and a second terminal, the first terminal of the high voltage resistor electrically connected to the diode unit, the second terminal of the high voltage resistor electrically connected to a first terminal of a first resistor, a second terminal of the first resistor electrically connected to a ground terminal;
- a metal oxide semiconductor field effect transistor comprising a drain, a gate and a source, the gate electrically connected to the high voltage resistor and the first resistor, the source electrically connected to the ground terminal;
- and
- a controller electrically connected to the drain,
- wherein the direct current voltage is divided by the high voltage resistor and the first resistor to obtain a judgment voltage to send to the gate;
- an on-off state of the metal oxide semiconductor field effect transistor is determined with the judgment voltage, and then a voltage level of the drain is changed to generate a pulse voltage signal;
- the controller performs detection according to the pulse voltage signal.
5 more elements
A ground detecting apparatus electrically connected to an alternating current power supply apparatus, the ground detecting apparatus comprising:
- a first high voltage resistor comprising a first terminal and a second terminal, the first terminal of the first high voltage resistor coupled to the alternating current power supply apparatus, the second terminal of the first high voltage resistor connected to a first terminal of a first resistor, a second terminal of the first resistor electrically connected to a ground terminal;
- a second high voltage resistor electrically connected to the alternating current power supply apparatus, the first high voltage resistor and the first resistor;
- a metal oxide semiconductor field effect transistor comprising a drain, a gate and a source, the gate electrically connected to the first high voltage resistor, the second high voltage resistor and the first resistor, the source electrically connected to the ground terminal;
- a zener diode electrically connected to the metal oxide semiconductor field effect transistor, the zener diode clamping a judgment voltage to protect the metal oxide semiconductor field effect transistor to prevent the gate from excessive voltage, the metal oxide semiconductor field effect transistor turned on and the gate in a low voltage state when a voltage of the ground terminal is higher than a voltage of the alternating current power supply apparatus;
- and
- a controller electrically connected to the drain,
- wherein the first high voltage resistor, the second high voltage resistor and the first resistor generates the judgment voltage to send to the gate;
- an on-off state of the metal oxide semiconductor field effect transistor is determined with the judgment voltage, and then a voltage level of the drain is changed to generate a pulse voltage signal;
- the controller performs detection according to the pulse voltage signal.
6 more elements
A relay action detecting apparatus coupled to two power lines of an alternating current power supply apparatus through a first relay and a second relay respectively, the relay action detecting apparatus comprising:
- a first diode comprising a first terminal and a second terminal, the first terminal of the first diode electrically connected to the first relay;
- a second diode comprising a first terminal and a second terminal, the first terminal of the second diode electrically connected to the second relay, the second terminal of the second diode electrically connected to the second terminal of the first diode, the first diode and the second diode generating a direct current voltage;
- a high voltage resistor comprising a first terminal and a second terminal, the first terminal of the high voltage resistor electrically connected to the second terminal of the first diode and the second terminal of the second diode, the second terminal of the high voltage resistor electrically connected to a first terminal of a first resistor, a second terminal of the first resistor electrically connected to a ground terminal;
- a metal oxide semiconductor field effect transistor comprising a drain, a gate and a source, the gate electrically connected to the high voltage resistor and the first resistor, the source electrically connected to the ground terminal;
- and
- a controller electrically connected to the drain,
- wherein the direct current voltage is divided by the high voltage resistor and the first resistor to obtain a judgment voltage to send to the gate;
- an on-off state of the metal oxide semiconductor field effect transistor is determined with the judgment voltage, and then a voltage level of the drain is changed to generate a pulse voltage signal;
- the controller performs detection according to the pulse voltage signal.
6 more elements
A relay action detecting apparatus coupled to two power lines of an alternating current power supply apparatus through a first relay and a second relay respectively, the relay action detecting apparatus comprising:
- a first high voltage resistor comprising a first terminal and a second terminal, the first terminal of the first high voltage resistor coupled to the alternating current power supply apparatus, the second terminal of the first high voltage resistor connected to a first terminal of a first resistor, a second terminal of the first resistor electrically connected to a ground terminal;
- a second high voltage resistor electrically connected to the alternating current power supply apparatus, the first high voltage resistor and the first resistor;
- a metal oxide semiconductor field effect transistor comprising a drain, a gate and a source, the gate electrically connected to the first high voltage resistor, the second high voltage resistor and the first resistor, the source electrically connected to the ground terminal;
- a zener diode electrically connected to the metal oxide semiconductor field effect transistor, the zener diode clamping a judgment voltage to protect the metal oxide semiconductor field effect transistor to prevent the gate from excessive voltage, the metal oxide semiconductor field effect transistor turned on and the gate in a low voltage state when a voltage of the ground terminal is higher than a voltage of the alternating current power supply apparatus;
- and
- a controller electrically connected to the drain,
- wherein the first high voltage resistor, the second high voltage resistor and the first resistor generates the judgment voltage to send to the gate;
- an on-off state of the metal oxide semiconductor field effect transistor is determined with the judgment voltage, and then a voltage level of the drain is changed to generate a pulse voltage signal;
- the controller performs detection according to the pulse voltage signal.
6 more elements
Dependencies are inferred from the claim text.