Arc-extinguishing power device driving apparatus and arc extinguishing apparatus

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device;
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the first voltage detection switch comprises a second current limiting element and a semiconductor switch,
• the second current limiting element is configured to transfer a potential difference signal between the two ends of the power device to a control end of the semiconductor switch,
• the semiconductor switch is connected in series in the driving loop, and
• the second current limiting element is a resistor or a capacitor.

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device;
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the arc extinguishing power device driving apparatus further comprises a first capacitor,
• a control end of the first voltage detection switch is connected to a first end of the power device;
• the first capacitor, the first voltage detection switch, and a second end and a third end of the power device form the driving loop;
• and
• the first capacitor is connected to a switch configured to recharge the first capacitor or a first current limiting element.

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device:
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the power device is a thyristor;
• the first voltage detection switch comprises a second current limiting element, a first transistor, a second transistor, a third transistor, and a fourth transistor;
• an emitter of the second transistor is connected to a base of the third transistor;
• a base of the second transistor is connected to an emitter of the third transistor;
• a collector of the second transistor is connected to a base of the first transistor;
• a base of the fourth transistor is connected to a collector of the third transistor;
• a collector of the fourth transistor is connected to the emitter of the second transistor;
• an emitter of the fourth transistor is connected to the base of the first transistor;
• the base of the second transistor is connected to a first end of the power device by using the second current limiting element;
• the emitter of the second transistor is connected to a third end of the power device;
• and
• an emitter of the first transistor and a collector of the first transistor are connected in series in the driving loop.

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device;
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the power device is a thyristor;
• the first voltage detection switch comprises a second current limiting element, a first transistor, a second transistor, a third transistor, and a fourth transistor;
• an emitter of the second transistor is connected to a base of the third transistor;
• a base of the second transistor is connected to an emitter of the third transistor;
• a collector of the second transistor is connected to a base of the first transistor;
• a base of the fourth transistor is connected to a collector of the third transistor;
• a collector of the fourth transistor is connected to the emitter of the second transistor;
• an emitter of the fourth transistor is connected to the base of the first transistor;
• the base of the second transistor is connected to a first end of the power device by using the second current limiting element;
• a collector of the first transistor is connected to the base of the second transistor;
• the emitter of the second transistor is connected to a second end of the power device;
• and
• an emitter of the first transistor and the emitter of the second transistor are connected in series in the driving loop of the power device.

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device:
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the arc extinguishing power device driving apparatus further comprises a second voltage detection switch,
• the first voltage detection switch, a second end of the power device, and a third end of the power device form the driving loop of the power device;
• a control end of the first voltage detection switch is connected to a first end of the power device;
• and
• two ends of the second voltage detection switch are respectively connected to the second end of the power device and the third end of the power device.

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device;
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the arc extinguishing power device driving apparatus further comprises a control unit, a first optocoupler, and a second optocoupler,
• an output end of the first optocoupler and a control end of the second optocoupler are connected to the first voltage detection switch,
• an output signal of the second optocoupler is connected to the control unit, and
• a control end of the first optocoupler is connected to the control unit.

An arc extinguishing power device driving apparatus, wherein a power device that needs to be driven is connected in parallel to a mechanical switch that requires arc extinguishing, the arc extinguishing power device driving apparatus comprising:

• a first voltage detection switch, wherein:
• an input end of the first voltage detection switch is connected to two ends of the power device;
• the first voltage detection switch is connected in series in a driving loop of the power device:
• the first voltage detection switch is configured to turn on when detecting that there is a potential difference between the two ends of the power device;
• the first voltage detection switch is configured to transfer a driving signal to the power device to drive the power device to be turned on;
• the first voltage detection switch is a semi-controllable switch, or a fully-controllable switch whose threshold is less than an on-state voltage of the power device;
• the power device is configured for direct current arc extinguishing, and
• the arc extinguishing power device driving apparatus further comprises a first semiconductor switch, a first current limiting element, and a first capacitor;
• the first semiconductor switch, the first capacitor, and the first current limiting element are sequentially connected in series to form a second series circuit;
• the second series circuit is connected in parallel to load of the mechanical switch;
• an end of the first semiconductor switch in the second series circuit is connected to a third end of the power device;
• a common end of the first semiconductor switch and the first capacitor is connected to a second end of the power device;
• and
• a third series circuit formed by the first semiconductor switch and the first capacitor that are connected in series is connected in parallel to the first voltage detection switch.