CN113364246A

CN113364246A - Driving control device and method for thyristor

Info

Publication number: CN113364246A
Application number: CN202110774437.0A
Authority: CN
Inventors: 张艳婷; 周维邦; 张旗旗; 张统世
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-09-07
Anticipated expiration: 2041-07-08
Also published as: CN113364246B

Abstract

The invention discloses a driving control device and method of a thyristor, wherein the device comprises: a control unit which transmits a drive control signal; the phase driving unit generates a driving signal according to the driving control signal when the circuit where the thyristor is located is electrified so as to drive a phase thyristor module in the circuit where the thyristor is located; the first-phase fault detection unit is used for detecting the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is electrified, and outputting a fault feedback signal according to the current voltage; and the one-phase driving unit is used for regenerating a driving signal according to the driving control signal and the fault feedback signal so as to control the turn-off of the one-phase thyristor module in the circuit where the thyristor is located under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit where the thyristor is located is in fault. According to the scheme, whether the thyristor breaks down or not is detected, and fault protection is carried out when the thyristor breaks down, so that the safety of a circuit where the thyristor is located can be improved.

Description

Driving control device and method for thyristor

Technical Field

The invention belongs to the technical field of electronic circuits, particularly relates to a driving control device and method of a thyristor, and particularly relates to a thyristor driving device and method with fault detection and feedback functions.

Background

With the development of power electronic technology, the application of the thyristor is more and more extensive, and the thyristor is a current-driven and semi-controlled electronic device, can work under the conditions of high voltage and large current, can control the working process, and is widely applied to electronic circuits such as controllable rectification, alternating current voltage regulation, contactless electronic switch, inversion, frequency conversion and the like.

During the operation of the circuit (e.g., a three-phase controllable rectifier circuit) in which the thyristor is located, the thyristor may have a fault (e.g., a fault that the thyristor is damaged and cannot be normally turned on or off), and if the thyristor continues to be used according to the normal operation mode, other components of the circuit (e.g., the three-phase controllable rectifier circuit) in which the thyristor is located may be damaged.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention aims to provide a driving control device and a driving control method of a thyristor, which aim to solve the problem that other elements of a circuit where the thyristor is located can be damaged and the safety of the circuit where the thyristor is located is influenced if the circuit where the thyristor is located is still used according to a normal working mode under the condition that the thyristor fails, and achieve the effect of improving the safety of the circuit where the thyristor is located by detecting whether the thyristor fails and carrying out fault protection when the thyristor fails.

In a driving control apparatus of a thyristor, a circuit in which the thyristor is located includes: at least one phase thyristor module; the thyristor drive control device includes: the device comprises a fault detection unit, a control unit and a driving unit; wherein the control unit is configured to transmit a driving control signal; the driving control signal is a signal for controlling the generation of a driving signal of a thyristor module in a circuit where the thyristor is located; the number of the driving units is the same as that of the thyristor modules in the circuit where the thyristors are located; the driving unit of one phase is configured to generate a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on so as to drive the thyristor module of one phase in the circuit where the thyristor is located; the driving signal is used for driving a phase thyristor module in a circuit where the thyristor is located to be turned on or turned off; the number of the fault detection units is the same as that of the thyristor modules in the circuit where the thyristors are located; the one-phase fault detection unit is configured to detect the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on, and output a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a phase thyristor module in a circuit where the thyristor is located has a fault; the one-phase driving unit is further configured to regenerate the driving signal according to the driving control signal and the fault feedback signal, so as to control the one-phase thyristor module in the circuit where the thyristor is located to be turned off when the fault feedback signal indicates that the one-phase thyristor module in the circuit where the thyristor is located is faulty.

In some embodiments, the driving unit includes: the device comprises an operation module, an isolation module and a driving module; wherein, the driving unit of one phase generates a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on, and the driving unit comprises: the operation module is configured to perform and operation on the fault feedback signal of the thyristor module of the phase in the circuit where the thyristor is located and the driving control signal to obtain an operation result as the driving control signal of the thyristor module of the phase in the circuit where the thyristor is located when the thyristor is powered on and the fault feedback signal of the thyristor module of the phase in the circuit where the thyristor is located indicates that the thyristor module of the phase in the circuit where the thyristor is located does not have a fault; the isolation module is configured to isolate the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, so as to obtain a driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located; the driving module is configured to generate a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located; a phase of the drive unit regenerating the drive signal based on the drive control signal and the fault feedback signal, comprising: the operation module is further configured to perform and operation on the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the driving control signal after the thyristor is powered on, so as to obtain an operation result, and the operation result is used as the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located; the isolation module is also configured to isolate the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, so as to obtain the driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located; the driving module is further configured to generate a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located.

In some embodiments, the isolation module comprises: an opto-coupler isolation circuit; the driving module includes: and a driving chip driving circuit.

In some embodiments, the failure detection unit includes: the device comprises a sampling module, a comparison module and an output module; wherein, the one-phase fault detection unit detects the current voltage of the one-phase thyristor module in the circuit where the thyristor is located after the thyristor is powered on, and outputs a fault feedback signal according to the current voltage, and the method includes: the sampling module is configured to detect the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on; the comparison module is configured to determine that a phase thyristor module in a circuit where the thyristor is located is normally conducted if the current voltage is a first set voltage value under the condition that the phase thyristor module in the circuit where the thyristor is located is in a conduction interval; if the current voltage is not the first set voltage value, determining that a thyristor module of one phase in the circuit where the thyristor is located is in fault, and outputting a fault signal that the thyristor module of one phase in the circuit where the thyristor is located is in fault; under the condition that a phase thyristor module in the circuit where the thyristor is located is in a cut-off interval, if the current voltage is a second set voltage value, determining that the phase thyristor module in the circuit where the thyristor is located is in fault, and outputting a fault signal that the phase thyristor module in the circuit where the thyristor is located is in fault; if the current voltage is not the second set voltage value, determining that a phase thyristor module in a circuit where the thyristor is located is normally conducted; the output module is configured to output a first fault signal if one phase thyristor module fails in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the one phase thyristor module in the circuit where the thyristor is located is in the conduction interval; under the condition that one phase of thyristor module in the circuit where the thyristor is located is in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is located have faults, outputting a second fault signal; and combining the first fault signal and the second fault signal to output a fault feedback signal.

In some embodiments, the sampling module comprises: the device comprises a rectification module, a filtering module and an operational amplifier module; after the thyristor is powered on, the sampling module detects the current voltage of a thyristor module of one phase in a circuit where the thyristor is located, and the sampling module includes: the arrangement module is configured to process current signals corresponding to voltage drops at two ends of a phase thyristor module in a circuit where the thyristor is located so as to obtain positive voltage serving as a positive voltage signal; the filtering module is configured to filter the rectified signal to obtain a filtered signal; and the operational amplifier module is configured to perform scaling processing on the filtering signal to obtain a scaling signal, and the scaling signal is used as the current voltage of a thyristor module of one phase in a circuit where the thyristor is located.

In some embodiments, the comparison module comprises: a comparator; the current voltage of a thyristor module of one phase in the circuit where the thyristor is located is output to the inverting input end of the comparator; the non-inverting input end of the comparator is used for inputting the first set voltage value under the condition that a phase thyristor module in a circuit where the thyristor is located is in a conduction interval; and under the condition that a phase thyristor module in the circuit where the thyristor is positioned is in a cut-off interval, the non-inverting input end of the comparator is used for inputting the second set voltage value.

In some embodiments, the output module comprises: the first AND gate module is connected with the NOR gate module; the NOR gate module is configured to output a first fault signal if one phase of thyristor module fails in at least one phase of thyristor module in the circuit where the thyristor is located under the condition that the one phase of thyristor module in the circuit where the thyristor is located is in a conduction interval; the first AND gate module is configured to output a second fault signal if all the phase thyristor modules are in fault in at least one phase thyristor module in the circuit where the thyristor is located under the condition that one phase thyristor module in the circuit where the thyristor is located is in a cut-off interval; the second AND gate module is configured to output a fault feedback signal in combination with the first fault signal and the second fault signal.

In a matching manner with the above device, a further aspect of the present invention provides a driving control method for a thyristor, where a circuit in which the thyristor is located includes: at least one phase thyristor module; the driving control method of the thyristor comprises the following steps: transmitting a driving control signal; the driving control signal is a signal for controlling the generation of a driving signal of a thyristor module in a circuit where the thyristor is located; the driving unit is configured to generate a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on so as to drive a thyristor module of one phase in the circuit where the thyristor is located; the driving signal is used for driving a phase thyristor module in a circuit where the thyristor is located to be turned on or turned off; the number of the driving units is the same as that of the thyristor modules in the circuit where the thyristors are located; the method comprises the steps that a one-phase fault detection unit is configured to detect the current voltage of a one-phase thyristor module in a circuit where a thyristor is located after the thyristor is powered on, and output a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a phase thyristor module in a circuit where the thyristor is located has a fault; the number of the fault detection units is the same as that of the thyristor modules in the circuit where the thyristors are located; and regenerating the driving signal through the driving unit of one phase according to the driving control signal and the fault feedback signal so as to control the turn-off of the thyristor module of one phase in the circuit where the thyristor is located under the condition that the fault feedback signal indicates that the thyristor module of one phase in the circuit where the thyristor is located is in fault.

In some embodiments, generating, by the driving unit of one phase, a driving signal according to the driving control signal when the circuit in which the thyristor is located is powered on includes: through the operation module, when the thyristor is electrified, the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located indicates that the thyristor module of one phase in the circuit where the thyristor is located does not have a fault, and the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the drive control signal are subjected to AND operation to obtain an operation result which is used as the drive control signal of the thyristor module of one phase in the circuit where the thyristor is located; isolating the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located through an isolation module to obtain a driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located; generating a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located through a driving module; regenerating the drive signal from the drive control signal and the fault feedback signal by one phase of the drive unit, comprising: through the operation module, after the thyristor is electrified, carrying out AND operation on the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the drive control signal to obtain an operation result which is used as the drive control signal of the thyristor module of one phase in the circuit where the thyristor is located; the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located is also isolated through an isolation module to obtain the driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located; and generating a driving signal according to the thyristor module of one phase in the circuit in which the thyristor is located through the driving module according to the driving isolation signal of the thyristor module of one phase in the circuit in which the thyristor is located.

In some embodiments, after the thyristor is powered on, detecting a current voltage of a thyristor module of a phase in a circuit in which the thyristor is located by the fault detection unit of the phase, and outputting a fault feedback signal according to the current voltage, includes: through a sampling module, after the thyristor is electrified, the current voltage of a thyristor module of one phase in a circuit where the thyristor is located is detected; through a comparison module, under the condition that a phase of thyristor module in the circuit where the thyristor is located is in a conduction interval, if the current voltage is a first set voltage value, determining that the phase of thyristor module in the circuit where the thyristor is located is normally conducted; if the current voltage is not the first set voltage value, determining that a thyristor module of one phase in the circuit where the thyristor is located is in fault, and outputting a fault signal that the thyristor module of one phase in the circuit where the thyristor is located is in fault; under the condition that a phase thyristor module in the circuit where the thyristor is located is in a cut-off interval, if the current voltage is a second set voltage value, determining that the phase thyristor module in the circuit where the thyristor is located is in fault, and outputting a fault signal that the phase thyristor module in the circuit where the thyristor is located is in fault; if the current voltage is not the second set voltage value, determining that a phase thyristor module in a circuit where the thyristor is located is normally conducted; through an output module, under the condition that a phase thyristor module in a circuit where the thyristor is located is in a conduction interval, if one phase thyristor module in at least one phase thyristor module in the circuit where the thyristor is located has a fault, outputting a first fault signal; under the condition that one phase of thyristor module in the circuit where the thyristor is located is in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is located have faults, outputting a second fault signal; and combining the first fault signal and the second fault signal to output a fault feedback signal.

Therefore, according to the scheme of the invention, the fault detection circuit and the fault feedback circuit of the thyristor are arranged in the circuit where the thyristor is located, the fault detection circuit is used for detecting whether the thyristor breaks down or not, and the fault feedback circuit is used for feeding back a fault signal to the driving circuit of the thyristor when the thyristor breaks down so as to carry out fault protection; therefore, the safety of the circuit where the thyristor is located can be improved by detecting whether the thyristor fails and performing fault protection when the thyristor fails.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a driving control apparatus of a thyristor according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a thyristor driving device according to the invention;

fig. 3 is a schematic diagram of a working flow of an embodiment of the thyristor driving device of the invention;

fig. 4 is a schematic structural diagram of an embodiment of a thyristor driving device according to the invention;

fig. 5 is a schematic flowchart of an embodiment of a driving control method of a thyristor according to the present invention;

FIG. 6 is a schematic flow chart illustrating one embodiment of generating the driving signal when the circuit in which the thyristor is located is powered on according to the method of the present invention;

FIG. 7 is a schematic flow chart illustrating one embodiment of regenerating the driving signal according to the driving control signal and the fault feedback signal in the method of the present invention;

fig. 8 is a schematic flow chart of an embodiment of outputting the fault feedback signal after the thyristor is powered on in the method of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

According to an embodiment of the present invention, there is provided a driving control apparatus for a thyristor. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The circuit where the thyristor is located comprises: at least one phase thyristor module. The thyristor drive control device includes: the device comprises a fault detection unit, a control unit and a driving unit. The fault detection unit is arranged between the thyristor and the control unit. The control unit can drive the thyristor through the drive unit. A fault detection unit, such as a fault detection circuit. And a control unit, such as an arithmetic circuit. And the driving unit comprises an optical coupling isolation circuit and a driving chip driving circuit.

Wherein the control unit is configured to transmit a driving control signal. The driving control signal is a signal for controlling generation of a driving signal of a thyristor module in a circuit in which the thyristor is located.

The number of the driving units is the same as that of the thyristor modules in the circuit where the thyristors are located. And the driving unit of one phase is configured to generate a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on so as to drive the thyristor module of one phase in the circuit where the thyristor is located. The driving signal is a signal for driving the thyristor module of one phase in the circuit where the thyristor is located to be turned on or turned off.

The number of the fault detection units is the same as the number of thyristor modules in the circuit where the thyristors are located. And the fault detection unit of one phase is configured to detect the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on, and output a fault feedback signal according to the current voltage. The fault feedback signal is a signal for indicating whether a phase thyristor module in a circuit where the thyristor is located has a fault.

The one-phase driving unit is further configured to regenerate the driving signal according to the driving control signal and the fault feedback signal, so as to control the one-phase thyristor module in the circuit where the thyristor is located to be turned off when the fault feedback signal indicates that the one-phase thyristor module in the circuit where the thyristor is located is faulty. And under the condition that the fault feedback signal indicates that the thyristor module of one phase in the circuit where the thyristor is located does not have a fault, controlling the thyristor module of one phase in the circuit where the thyristor is located to normally work.

Specifically, the control unit of one phase is further configured to perform an and operation on a control signal and the fault feedback signal to generate a driving control signal, so that when the fault feedback signal indicates that a thyristor module of one phase in the thyristor fails, no driving signal is output, and the thyristor module of one phase in the thyristor circuit is controlled to be turned off.

The invention provides a thyristor driving device with fault detection and feedback, which feeds back a detection signal to an input circuit part to perform related fault protection actions, the fault feedback detection is timely, and the thyristor can be protected in time after a fault occurs, so that the problem of fault detection of the thyristor during the fault occurrence is solved, and the problems of fault feedback and circuit protection under the condition of the fault of the thyristor are solved.

In some embodiments, the driving unit includes: the device comprises an operation module, an isolation module and a driving module. The operation module is an operation circuit. The isolation module is, for example, an optical coupling isolation circuit. The driving module is, for example, a driving chip driving circuit.

Wherein, the driving unit of one phase generates a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on, and the driving unit comprises:

the operation module is configured to perform and operation on the fault feedback signal of the thyristor module of the phase in the circuit where the thyristor is located and the driving control signal to obtain an operation result as the driving control signal of the thyristor module of the phase in the circuit where the thyristor is located when the thyristor is powered on and the fault feedback signal of the thyristor module of the phase in the circuit where the thyristor is located indicates that the thyristor module of the phase in the circuit where the thyristor is located does not have a fault.

The isolation module is configured to isolate the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, obtain the driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, and use the driving isolation signal as the driving isolation signal of the thyristor module of one phase in the circuit where the thyristor is located.

The driving module is configured to generate a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located.

A phase of the drive unit regenerating the drive signal based on the drive control signal and the fault feedback signal, comprising:

the operation module is further configured to perform and operation on the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the driving control signal after the thyristor is powered on, so as to obtain an operation result, and the operation result is used as the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located.

The isolation module is further configured to isolate the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, obtain a driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, and use the driving isolation signal as the driving isolation signal of the thyristor module of one phase in the circuit where the thyristor is located.

The driving module is further configured to generate a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located.

The invention provides a thyristor driving device with fault detection and feedback, which has better driving capability, enables the thyristor fault feedback detection to be more timely, and can feed fault signals back to an input circuit in time to carry out related fault protection actions.

In some embodiments, the isolation module comprises: optical coupling isolation circuit. The driving module includes: and a driving chip driving circuit.

According to the thyristor driving device with fault detection and feedback, the driving mode of the optocoupler and the driving chip is adopted, so that the driving capability of the driving circuit of the thyristor can be effectively improved, and the problem that the driving capability of the thyristor is weak in some driving modes is solved. In the related scheme, the used optical coupler driving mode may have the problem of insufficient driving capability. In the scheme of the invention, a driving mode of adopting an optical coupler and a driving chip is provided to improve the driving capability of the circuit.

Fig. 2 is a schematic structural diagram of an embodiment of the thyristor driving device of the invention. As shown in fig. 2, the thyristor driving apparatus mainly includes: the circuit comprises a signal input circuit, an arithmetic circuit, an optical coupling isolation circuit, a driving chip driving circuit, a thyristor and a fault detection circuit.

And a signal input circuit capable of inputting the driving control signal of the thyristor to the arithmetic circuit, and the other end of the arithmetic circuit is connected to a fault feedback signal fed back by the fault detection circuit. The output end of the operational circuit is connected into the optical coupling isolation circuit. And the output end of the optical coupling isolation circuit is connected with a driving chip driving circuit. The output of the driving chip driving circuit can drive the thyristor. The fault detection circuit is connected to two ends of the thyristor and mainly judges whether the thyristor has a fault by detecting the voltage at the two ends of the thyristor.

In some embodiments, the failure detection unit includes: the device comprises a sampling module, a comparison module and an output module.

Wherein, the one-phase fault detection unit detects the current voltage of the one-phase thyristor module in the circuit where the thyristor is located after the thyristor is powered on, and outputs a fault feedback signal according to the current voltage, and the method includes:

the sampling module is configured to detect the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on.

The comparison module is configured to determine that a phase thyristor module in a circuit where the thyristor is located is normally conducted if the current voltage is a first set voltage value under the condition that the phase thyristor module in the circuit where the thyristor is located is in a conduction interval. And if the current voltage is not the first set voltage value, determining that a thyristor module of one phase in the circuit where the thyristor is located is in fault, and outputting a fault signal that the thyristor module of one phase in the circuit where the thyristor is located is in fault.

The first setting voltage value may be 0V. That is to say, if the current voltage is 0, it is determined that one phase of thyristor module in the thyristor circuit is normally turned on; and if the current voltage is not 0, determining that one phase of thyristor module in the thyristor circuit fails, and outputting a fault signal that one phase of thyristor module in the thyristor circuit fails.

The comparison module is specifically configured to determine that a thyristor module of one phase in the circuit where the thyristor is located fails and output a fault signal that the thyristor module of one phase in the circuit where the thyristor is located fails if the current voltage is a second set voltage value under the condition that the thyristor module of one phase in the circuit where the thyristor is located is in a cut-off interval. And if the current voltage is not the second set voltage value, determining that a phase thyristor module in the circuit where the thyristor is located is normally conducted.

The second setting voltage value may be 0V. That is to say, if the current voltage is 0, determining that a thyristor module of one phase in the thyristor circuit fails, and outputting a fault signal indicating that the thyristor module of one phase in the thyristor circuit fails; and if the current voltage is not 0, determining that one phase of thyristor module in the thyristor circuit is normally conducted.

The output module is configured to output a first fault signal if one phase thyristor module fails in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the one phase thyristor module in the circuit where the thyristor is located is in the conduction interval. And under the condition that one phase of thyristor module in the circuit where the thyristor is positioned in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is positioned have faults, outputting a second fault signal. And combining the first fault signal and the second fault signal to output a fault feedback signal.

Specifically, the sampling circuit is used for sampling voltages at two ends of the thyristor to judge the switching state of the thyristor, so that the fault condition of the thyristor can be detected effectively in time, and therefore fault detection can be performed timely when the thyristor breaks down, and whether the thyristor breaks down or not can be detected effectively in time. For example: the fault detection circuit samples the voltages at two ends of the thyristor mainly through the sampling circuit, and the voltage value after sampling judges whether the two ends of the thyristor are 0 through the comparator so as to judge the fault condition of the thyristor.

Furthermore, when the fault detection circuit detects that the thyristor has a fault, the fault feedback circuit can feed back a fault signal to the drive circuit in time and start circuit protection measures. Therefore, after the thyristor fault is detected, the fault feedback signal is timely input to the driving circuit. For example: the fault feedback circuit adopts a mode of AND operation of the fault feedback signal and the driving signal, and can stop outputting the driving signal of each phase of thyristor in time when the thyristor breaks down, so that damage in a larger range is prevented.

Fig. 3 is a schematic working flow diagram of an embodiment of the thyristor driving device according to the present invention. As shown in fig. 3, the work flow of the thyristor driving device includes:

step 1, when a circuit where the thyristor is located is just powered on, a fault feedback signal of the thyristor is initially at a high level, a driving control signal (such as a pulse driving control signal) of the thyristor is normally input into a thyristor driving device, after the optical coupling isolation circuit is conducted, the driving capability of the driving signal is improved through a driving chip driving circuit (such as a driving chip with the model of IRS 4427), and the output driving signal directly drives the thyristor.

Step 2, when the thyristor is in a conduction interval:

if the voltage at the two ends of the thyristor is 0 (neglecting the conduction voltage drop of the thyristor), the thyristor is normally conducted, the driving signal is normally output, and the driving capability is improved through the driving chip driving circuit after passing through the optical coupling isolation circuit.

If the voltage at two ends of the thyristor is not 0 (neglecting the conduction voltage drop of the thyristor), the thyristor is not normally conducted, the fault detection circuit outputs a low-level fault feedback signal, and the low-level fault feedback signal and the thyristor pulse drive control signal are subjected to AND operation through the operation circuit, so that the thyristors of all phases have no gate drive signal input, and the situation that the thyristors which are not damaged at other phases are continuously conducted under the fault condition to cause larger-range damage is prevented.

When the thyristor is in the cut-off interval:

if the voltage at the two ends of the thyristor is not 0 (neglecting the conduction voltage drop of the thyristor), the thyristor is normally turned off, if the voltage at the two ends of the thyristor is 0 (neglecting the conduction voltage drop of the thyristor), the thyristor is not normally turned off, the fault detection circuit outputs a low-level fault feedback signal, and the low-level fault feedback signal and the thyristor pulse driving control signal are subjected to AND operation through the operation circuit, so that the thyristors of all phases have no gate driving signal input, and the situation that the undamaged thyristors of other phases are continuously turned on under the fault condition to cause larger-range damage is prevented.

In some embodiments, the sampling module comprises: the device comprises a rectifying module, a filtering module and an operational amplifier module. And a finishing module, such as a rectifier bridge DB. A filtering module, such as an RC filtering module. And an operational amplifier module, such as an operational amplifier module mainly composed of an operational amplifier A1.

After the thyristor is powered on, the sampling module detects the current voltage of a thyristor module of one phase in a circuit where the thyristor is located, and the sampling module includes:

the arrangement module is configured to process current signals corresponding to voltage drops at two ends of a phase thyristor module in a circuit where the thyristor is located so as to obtain positive voltage serving as a positive voltage signal.

The filtering module is configured to filter the rectified signal to obtain a filtered signal.

And the operational amplifier module is configured to perform scaling processing on the filtering signal to obtain a scaling signal, and the scaling signal is used as the current voltage of a thyristor module of one phase in a circuit where the thyristor is located.

In some embodiments, the comparison module comprises: a comparator. And the current voltage of a thyristor module of one phase in the circuit where the thyristor is positioned is output to the inverting input end of the comparator. And the non-inverting input end of the comparator is used for inputting the first set voltage value under the condition that a phase thyristor module in the circuit where the thyristor is positioned is in a conduction interval. And under the condition that a phase thyristor module in the circuit where the thyristor is positioned is in a cut-off interval, the non-inverting input end of the comparator is used for inputting the second set voltage value. The first setting voltage value and the second setting voltage value may be the same.

In some embodiments, the output module comprises: the first AND gate module is connected with the NOR gate module. Or nor gate module, such as nor gate U1. A first and gate module, such as and gate U2. And a second and gate module, such as and gate U3.

The output module outputs a first fault signal if one phase thyristor module fails in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the one phase thyristor module in the circuit where the thyristor is located is in the conduction interval. And under the condition that one phase of thyristor module in the circuit where the thyristor is positioned in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is positioned have faults, outputting a second fault signal. And combining said first fault signal and said second fault signal to output a fault feedback signal, comprising:

the NOR gate module is configured to output a first fault signal if one phase of thyristor module in a circuit in which the thyristor is located is in a fault in at least one phase of thyristor module in the circuit in which the thyristor is located when the one phase of thyristor module is in a conduction interval.

The first AND gate module is configured to output a second fault signal if all the phase thyristor modules are in fault in at least one phase thyristor module in the circuit where the thyristor is located under the condition that one phase thyristor module in the circuit where the thyristor is located is in a cut-off interval.

The second AND gate module is configured to output a fault feedback signal in combination with the first fault signal and the second fault signal.

Fig. 4 is a schematic structural diagram of a thyristor driving device according to an embodiment of the invention. As shown in fig. 4, the fault detection circuit is composed of a rectifier bridge DB, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C2, an operational amplifier a1, a comparator a2, a nor gate U1, an and gate U2, and a gate U3. An arithmetic circuit, comprising: the arithmetic circuit for each phase includes a U-phase arithmetic circuit, a V-phase arithmetic circuit, and a W-phase arithmetic circuit. The U-phase operational circuit includes an and gate U6, the V-phase operational circuit includes an and gate U5, and the W-phase operational circuit includes an and gate U4. An opto-isolator circuit comprising: u looks opto-coupler isolation circuit, V looks opto-coupler isolation circuit and W looks opto-coupler isolation circuit. The U-phase optical coupler isolation circuit comprises an optical coupler OC3, the V-phase optical coupler isolation circuit comprises an optical coupler OC2, and the W-phase optical coupler isolation circuit comprises an optical coupler OC 1. A driver chip driving circuit comprising: the driving circuit comprises a U-phase driving chip, a V-phase driving chip and a W-phase driving chip. The circuit of the thyristor is, for example, the circuit of a three-phase thyristor. The circuit where the three-phase thyristor is located is composed of a thyristor S1, a thyristor S2, a thyristor S3, a diode D1, a diode D2, a diode D3 and a capacitor C1.

The fault feedback signal output by the and gate U3 and the U-phase drive control signal are output to the optocoupler OC3 through the and gate U6, and are output to the U-phase drive chip after being isolated by the optocoupler OC 3. The U-phase driving signal output by the U-phase driving chip is output to the control end of the thyristor S1. The cathode of the thyristor S1 is connected to the anode of the capacitor C1. The anode of thyristor S1 is connected to the cathode of diode D1. The anode of the diode D1 is connected to the cathode of the electrolytic capacitor C1.

The fault feedback signal output by the and gate U3 and the V-phase drive control signal are output to the optocoupler OC2 through the and gate U5, and are output to the V-phase drive chip after being isolated by the optocoupler OC 2. The V-phase driving signal output by the V-phase driving chip is output to the control end of the thyristor S2. The cathode of the thyristor S2 is connected to the anode of the capacitor C1. The anode of thyristor S2 is connected to the cathode of diode D2. The anode of the diode D2 is connected to the cathode of the electrolytic capacitor C1.

And the fault feedback signal output by the AND gate U3 and the W-phase drive control signal are output to the optical coupler OC1 after passing through the AND gate U4, and are output to the W-phase drive chip after being isolated by the optical coupler OC 1. The W-phase driving signal output by the W-phase driving chip is output to the control end of the thyristor S3. The cathode of the thyristor S3 is connected to the anode of the capacitor C1. The anode of thyristor S3 is connected to the cathode of diode D3. The anode of the diode D3 is connected to the cathode of the electrolytic capacitor C1.

And the fault detection circuit can detect whether each phase of thyristor in the circuit where the thyristor is positioned has a fault. For example: taking the W-phase as an example, the fault detection circuit can detect whether the W-phase thyristor is faulty or not. The cathode of thyristor S3 is connected to a first input of rectifier bridge DB. The anode of thyristor S3 is connected to the second input of rectifier bridge DB. The output end of the rectifier bridge DB is output to a NOR gate U1 or an AND gate U2 after passing through an RC filtering module consisting of a resistor R1 and a capacitor C2, an operational amplifier module and a comparator A2. The output terminal of the nor gate U1 and the output terminal of the and gate U2 are input to the and gate U3, respectively. The operational amplifier module comprises: operational amplifier A1, resistor R2, resistor R3, resistor R4 and resistor R5. The first output terminal of the RC filter module is connected to the inverting input terminal of the operational amplifier a1 through a resistor R2. The second output end of the RC filtering module is connected to the non-inverting input end of the operational amplifier a1 through a resistor R3. The inverting input terminal of the operational amplifier a1 is connected to the output terminal of the operational amplifier a1 and the inverting input terminal of the comparator a2 through a resistor R5. The non-inverting input terminal of the operational amplifier A1 is grounded through a resistor R4. The non-inverting input of comparator a2 is connected to ground. The output terminal of the comparator a2 is output to the nor gate U1 during the thyristor on period and to the and gate U2 during the thyristor off period.

The main function of the rectifier bridge DB is to ensure that the output is positive voltage, because when the thyristor is cut off, the voltage across the thyristor is variable, and may be positive voltage or negative voltage, and the output when the voltage across the thyristor is compared with the comparator in the case of negative voltage is the same as the output result when the voltage across the thyristor is 0, so that the detection effect cannot be achieved. And an RC filtering module consisting of the resistor R1 and the capacitor C2 performs filtering when the rectifier bridge plays a rectifying role.

As shown in fig. 4, in a specific embodiment of the thyristor driving device provided in the solution of the present invention, when the thyristor is in the conduction interval, if the thyristor is normally conducted, the voltage at both ends is 0 (neglecting the conduction voltage drop of the thyristor), the sampling circuit outputs 0, then the comparator outputs a low level, the nor gate outputs a high level, the and gate outputs a high level, and the and gate outputs a high level and the driving signal, so that the normal output of the driving signal is not affected. If the thyristor is abnormally conducted due to failure, the voltages at the two ends are not 0, a sampling signal is output after the sampling circuit, a high level is output through the comparator, a low level is output after NOR operation, the low level is output through AND operation, and finally the driving signal is output after the AND operation with the driving control signal.

When the thyristor is in a cut-off interval, if the thyristor is normally turned off, the voltage at two ends is not 0 (neglecting the turn-on voltage drop of the thyristor), and a sampling signal is output after passing through the sampling circuit and then a high level is output through the comparator. After the AND operation, the high level is output, then the high level is continuously output through the AND operation, and finally the high level is output to be AND-operated with the driving signal, so that the normal output of the driving signal is not influenced. If the thyristor is abnormally shut down due to failure, the voltage at two ends is 0, a sampling signal is output after the sampling circuit, a low level is output after the sampling signal passes through the comparator, the low level is output after the AND operation, and finally the AND operation is carried out on the low level and the driving control signal to stop outputting the driving signal.

The example shown in fig. 4 is only one embodiment of the present invention, and is not intended to limit other embodiments of the present invention.

The example shown in fig. 4 only relates to a fault detection circuit of one phase, but the scheme of the invention is applied to each phase, and ensures that each phase thyristor can be detected by the fault detection circuit and fed back to the input part when in fault. In addition, the scheme of the invention is not limited by the parameters of the example design, and the parameters can be adjusted and designed according to practical application.

Therefore, in the thyristor driving device provided by the scheme of the invention, the fault detection circuit mainly judges whether the circuit has faults by sampling the voltages at two ends of the thyristor through the sampling circuit, for example, the sampling circuit samples the voltages at two ends of the thyristor and then the operation circuit judges whether the thyristor has faults. The fault detection result can be fed back to the input circuit in time, if the thyristor fails, the output of all thyristor gate drive signals is stopped, and if the thyristor fails, the fault detection result is fed back to the input circuit to perform related fault protection actions. The thyristor driving device has good driving capability, can timely detect faults when the thyristor breaks down and feed back detection signals to the input circuit part for relevant fault protection actions.

By adopting the technical scheme of the invention, the fault detection circuit and the fault feedback circuit of the thyristor are arranged in the circuit where the thyristor is positioned, the fault detection circuit is utilized to detect whether the thyristor has a fault or not, and the fault feedback circuit is utilized to feed back a fault signal to the driving circuit of the thyristor when the thyristor has the fault so as to carry out fault protection. Therefore, the safety of the circuit where the thyristor is located can be improved by detecting whether the thyristor fails and performing fault protection when the thyristor fails.

According to an embodiment of the present invention, a driving control method of a thyristor corresponding to a circuit in which the thyristor is located is also provided, as shown in fig. 5, which is a schematic flow chart of an embodiment of the method of the present invention. The circuit where the thyristor is located comprises: at least one phase thyristor module. The driving control method of the thyristor comprises the following steps: step S110 to step S140.

At step S110, a drive control signal is transmitted. The driving control signal is a signal for controlling generation of a driving signal of a thyristor module in a circuit in which the thyristor is located.

At step S120, a one-phase driving unit is configured to generate a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on, so as to drive a one-phase thyristor module in the circuit where the thyristor is located. The driving signal is a signal for driving the thyristor module of one phase in the circuit where the thyristor is located to be turned on or turned off. The number of the driving units is the same as that of the thyristor modules in the circuit where the thyristors are located.

In step S130, the one-phase fault detection unit is configured to detect a current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on, and output a fault feedback signal according to the current voltage. The fault feedback signal is a signal for indicating whether a phase thyristor module in a circuit where the thyristor is located has a fault. The number of the fault detection units is the same as the number of thyristor modules in the circuit where the thyristors are located.

In step S140, the driving unit regenerates the driving signal according to the driving control signal and the fault feedback signal, so as to control the thyristor module of one phase in the circuit where the thyristor is located to turn off when the fault feedback signal indicates that the thyristor module of one phase in the circuit where the thyristor is located is faulty. And under the condition that the fault feedback signal indicates that the thyristor module of one phase in the circuit where the thyristor is located does not have a fault, controlling the thyristor module of one phase in the circuit where the thyristor is located to normally work.

The fault detection unit is arranged between the thyristor and the control unit. The control unit can drive the thyristor through the drive unit. A fault detection unit, such as a fault detection circuit. And a control unit, such as an arithmetic circuit. And the driving unit comprises an optical coupling isolation circuit and a driving chip driving circuit.

In some embodiments, in step S120, by using one phase of the driving unit, when the circuit where the thyristor is located is powered on, a specific process of generating a driving signal according to the driving control signal is described in the following exemplary description.

The following further describes, with reference to a schematic flow chart of an embodiment of the method shown in fig. 6, where the driving signal is generated when the circuit where the thyristor is located is powered on, a specific process of generating the driving signal when the circuit where the thyristor is located is powered on in step S120, where the specific process includes: step S210 to step S230.

Step S210, when the thyristor is powered on, the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located indicates that the thyristor module of one phase in the circuit where the thyristor is located is not in fault through an operation module, and the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the driving control signal are subjected to AND operation to obtain an operation result, and the operation result is used as the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located.

Step S220, isolating the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located through an isolation module to obtain the driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, and using the driving isolation signal as the driving isolation signal of the thyristor module of one phase in the circuit where the thyristor is located.

Step S230, generating, by the driving module, a driving signal according to the thyristor module of the phase in the circuit where the thyristor is located according to the driving isolation signal of the thyristor module of the phase in the circuit where the thyristor is located.

In some embodiments, the specific process of regenerating the driving signal by the driving unit of one phase according to the driving control signal and the fault feedback signal in step S140 is as follows.

The following further describes, with reference to a flowchart of an embodiment of the method shown in fig. 7, in which the driving signal is regenerated according to the driving control signal and the fault feedback signal, a specific process of regenerating the driving signal according to the driving control signal and the fault feedback signal in step S140, including: step S310 to step S330.

And step S310, performing AND operation on the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the driving control signal through an operation module after the thyristor is electrified to obtain an operation result, wherein the operation result is used as the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located.

Step S320, isolating, by the isolation module, the driving control signal of the thyristor module of the phase in the circuit where the thyristor is located, to obtain the driving isolation signal of the driving control signal of the thyristor module of the phase in the circuit where the thyristor is located, as the driving isolation signal of the thyristor module of the phase in the circuit where the thyristor is located.

And step S330, generating a driving signal according to the thyristor module of one phase in the circuit where the thyristor is located through the driving module and according to the driving isolation signal of the thyristor module of one phase in the circuit where the thyristor is located.

The operation module is an operation circuit. The isolation module is, for example, an optical coupling isolation circuit. The driving module is, for example, a driving chip driving circuit. The invention provides a thyristor driving device with fault detection and feedback, which has better driving capability, enables the thyristor fault feedback detection to be more timely, and can feed fault signals back to an input circuit in time to carry out related fault protection actions.

In some embodiments, in step S130, after the thyristor is powered on, the current voltage of the thyristor module of one phase in the circuit where the thyristor is located is detected by the fault detection unit of one phase, and a specific process of outputting a fault feedback signal according to the current voltage is described in the following exemplary description.

The following further describes a specific process of outputting the fault feedback signal after the thyristor is powered on in step S130, with reference to a schematic flow chart of an embodiment of outputting the fault feedback signal after the thyristor is powered on in the method of the present invention shown in fig. 8, where the process includes: step S410 to step S430.

Step S410, through a sampling module, after the thyristor is electrified, the current voltage of a thyristor module of one phase in the circuit where the thyristor is located is detected.

Step S420, by the comparison module, under the condition that a phase thyristor module in the circuit where the thyristor is located is in the conduction interval, if the current voltage is the first set voltage value, it is determined that the phase thyristor module in the circuit where the thyristor is located is normally conducted. And if the current voltage is not the first set voltage value, determining that a thyristor module of one phase in the circuit where the thyristor is located is in fault, and outputting a fault signal that the thyristor module of one phase in the circuit where the thyristor is located is in fault. The first setting voltage value may be 0V.

And through the comparison module, under the condition that a phase thyristor module in the circuit where the thyristor is located is in a cut-off interval, if the current voltage is a second set voltage value, determining that the phase thyristor module in the circuit where the thyristor is located is in fault, and outputting a fault signal that the phase thyristor module in the circuit where the thyristor is located is in fault. And if the current voltage is not the second set voltage value, determining that a phase thyristor module in the circuit where the thyristor is located is normally conducted. The second setting voltage value may be 0V.

Step S430, through an output module, under the condition that one phase thyristor module in the circuit where the thyristor is located is in the conduction interval, in at least one phase thyristor module in the circuit where the thyristor is located, if one phase thyristor module fails, a first fault signal is output. And under the condition that one phase of thyristor module in the circuit where the thyristor is positioned in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is positioned have faults, outputting a second fault signal. And combining the first fault signal and the second fault signal to output a fault feedback signal.

step 1, when a circuit where the thyristor is located is just powered on, a fault feedback signal of the thyristor is initially at a high level, a driving control signal (such as a pulse driving control signal) of the thyristor is normally input into a thyristor driving device, after the optical coupling isolation circuit is conducted, the driving capability of the driving signal is improved through a driving chip driving circuit, and the output driving signal directly drives the thyristor.

Step 2, when the thyristor is in a conduction interval:

When the thyristor is in the cut-off interval:

Therefore, in the thyristor driving method provided by the scheme of the invention, the fault detection circuit mainly judges whether the circuit has faults by sampling the voltages at two ends of the thyristor through the sampling circuit, for example, the sampling circuit samples the voltages at two ends of the thyristor and then the operation circuit judges whether the thyristor has faults. The fault detection result can be fed back to the input circuit in time, if the thyristor fails, the output of all thyristor gate drive signals is stopped, and if the thyristor fails, the fault detection result is fed back to the input circuit to perform related fault protection actions. The thyristor driving device has good driving capability, can timely detect faults when the thyristor breaks down and feed back detection signals to the input circuit part for relevant fault protection actions.

Since the processing and functions implemented by the method of this embodiment substantially correspond to the embodiments, principles, and examples of the circuit where the thyristor is located, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.

By adopting the technical scheme of the embodiment, the fault detection circuit and the fault feedback circuit of the thyristor are arranged in the circuit where the thyristor is located, the fault detection circuit is used for detecting whether the thyristor fails, and the fault feedback circuit is used for feeding back a fault signal to the driving circuit of the thyristor when the thyristor fails so as to carry out fault protection, so that fault detection can be carried out in time when the thyristor fails, and whether the thyristor fails or not can be effectively detected in time; the thyristor fault feedback detection is more timely, and a fault signal can be timely fed back to the input circuit to carry out related fault protection actions.

In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A driving control device of a thyristor, characterized in that a circuit where the thyristor is located comprises: at least one phase thyristor module; the thyristor drive control device includes: the device comprises a fault detection unit, a control unit and a driving unit; wherein the content of the first and second substances,

the control unit configured to transmit a driving control signal; the driving control signal is a signal for controlling the generation of a driving signal of a thyristor module in a circuit where the thyristor is located;

the number of the driving units is the same as that of the thyristor modules in the circuit where the thyristors are located; the driving unit of one phase is configured to generate a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on so as to drive the thyristor module of one phase in the circuit where the thyristor is located; the driving signal is used for driving a phase thyristor module in a circuit where the thyristor is located to be turned on or turned off;

the number of the fault detection units is the same as that of the thyristor modules in the circuit where the thyristors are located; the one-phase fault detection unit is configured to detect the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on, and output a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a phase thyristor module in a circuit where the thyristor is located has a fault;

the one-phase driving unit is further configured to regenerate the driving signal according to the driving control signal and the fault feedback signal, so as to control the one-phase thyristor module in the circuit where the thyristor is located to be turned off when the fault feedback signal indicates that the one-phase thyristor module in the circuit where the thyristor is located is faulty.

2. The drive control device of a thyristor according to claim 1, wherein the drive unit comprises: the device comprises an operation module, an isolation module and a driving module; wherein the content of the first and second substances,

the phase of the driving unit generates a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on, and the phase of the driving unit comprises the following steps:

the operation module is configured to perform and operation on the fault feedback signal of the thyristor module of the phase in the circuit where the thyristor is located and the driving control signal to obtain an operation result as the driving control signal of the thyristor module of the phase in the circuit where the thyristor is located when the thyristor is powered on and the fault feedback signal of the thyristor module of the phase in the circuit where the thyristor is located indicates that the thyristor module of the phase in the circuit where the thyristor is located does not have a fault;

the isolation module is configured to isolate the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, so as to obtain a driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located;

the driving module is configured to generate a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located;

the operation module is further configured to perform and operation on the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the driving control signal after the thyristor is powered on, so as to obtain an operation result, and the operation result is used as the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located;

the isolation module is also configured to isolate the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located, so as to obtain the driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located;

3. The driving control device of a thyristor according to claim 2, wherein the isolation module comprises: an opto-coupler isolation circuit; the driving module includes: and a driving chip driving circuit.

4. The drive control device of a thyristor according to any one of claims 1 to 3, wherein the fault detection unit comprises: the device comprises a sampling module, a comparison module and an output module; wherein the content of the first and second substances,

the phase fault detection unit detects a current voltage of a thyristor module of a phase in a circuit where the thyristor is located after the thyristor is powered on, and outputs a fault feedback signal according to the current voltage, and includes:

the sampling module is configured to detect the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on;

the comparison module is configured to determine that a phase thyristor module in a circuit where the thyristor is located is normally conducted if the current voltage is a first set voltage value under the condition that the phase thyristor module in the circuit where the thyristor is located is in a conduction interval; if the current voltage is not the first set voltage value, determining that a thyristor module of one phase in the circuit where the thyristor is located is in fault, and outputting a fault signal that the thyristor module of one phase in the circuit where the thyristor is located is in fault;

under the condition that a phase thyristor module in the circuit where the thyristor is located is in a cut-off interval, if the current voltage is a second set voltage value, determining that the phase thyristor module in the circuit where the thyristor is located is in fault, and outputting a fault signal that the phase thyristor module in the circuit where the thyristor is located is in fault; if the current voltage is not the second set voltage value, determining that a phase thyristor module in a circuit where the thyristor is located is normally conducted;

the output module is configured to output a first fault signal if one phase thyristor module fails in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the one phase thyristor module in the circuit where the thyristor is located is in the conduction interval; under the condition that one phase of thyristor module in the circuit where the thyristor is located is in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is located have faults, outputting a second fault signal; and combining the first fault signal and the second fault signal to output a fault feedback signal.

5. The driving control device of the thyristor according to claim 4, wherein the sampling module comprises: the device comprises a rectification module, a filtering module and an operational amplifier module; wherein the content of the first and second substances,

the sampling module detects the current voltage of a thyristor module of one phase in a circuit where the thyristor is located after the thyristor is powered on, and the sampling module comprises:

the arrangement module is configured to process current signals corresponding to voltage drops at two ends of a phase thyristor module in a circuit where the thyristor is located so as to obtain positive voltage serving as a positive voltage signal;

the filtering module is configured to filter the positive voltage signal to obtain a filtered signal;

6. The driving control device of the thyristor according to claim 4, wherein the comparison module comprises: a comparator; the current voltage of a thyristor module of one phase in the circuit where the thyristor is located is output to the inverting input end of the comparator; the non-inverting input end of the comparator is used for inputting the first set voltage value under the condition that a phase thyristor module in a circuit where the thyristor is located is in a conduction interval; and under the condition that a phase thyristor module in the circuit where the thyristor is positioned is in a cut-off interval, the non-inverting input end of the comparator is used for inputting the second set voltage value.

7. The driving control device of the thyristor according to claim 4, wherein the output module comprises: the first AND gate module is connected with the NOR gate module; wherein the content of the first and second substances,

the NOR gate module is configured to output a first fault signal if one phase of thyristor module in a circuit in which the thyristor is located is in a fault in at least one phase of thyristor module in the circuit in which the thyristor is located when the one phase of thyristor module is in a conduction interval;

the first AND gate module is configured to output a second fault signal if all the phase thyristor modules are in fault in at least one phase thyristor module in the circuit where the thyristor is located under the condition that one phase thyristor module in the circuit where the thyristor is located is in a cut-off interval;

8. A circuit with a thyristor, comprising: a drive control device of a thyristor according to any one of claims 1 to 7.

9. A driving control method of a thyristor is characterized in that a circuit where the thyristor is located comprises the following steps: at least one phase thyristor module; the driving control method of the thyristor comprises the following steps:

transmitting a driving control signal; the driving control signal is a signal for controlling the generation of a driving signal of a thyristor module in a circuit where the thyristor is located;

the driving unit is configured to generate a driving signal according to the driving control signal when the circuit where the thyristor is located is powered on so as to drive a thyristor module of one phase in the circuit where the thyristor is located; the driving signal is used for driving a phase thyristor module in a circuit where the thyristor is located to be turned on or turned off; the number of the driving units is the same as that of the thyristor modules in the circuit where the thyristors are located;

the method comprises the steps that a one-phase fault detection unit is configured to detect the current voltage of a one-phase thyristor module in a circuit where a thyristor is located after the thyristor is powered on, and output a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a phase thyristor module in a circuit where the thyristor is located has a fault; the number of the fault detection units is the same as that of the thyristor modules in the circuit where the thyristors are located;

and regenerating the driving signal through the driving unit of one phase according to the driving control signal and the fault feedback signal so as to control the turn-off of the thyristor module of one phase in the circuit where the thyristor is located under the condition that the fault feedback signal indicates that the thyristor module of one phase in the circuit where the thyristor is located is in fault.

10. The method of claim 9, wherein generating, by the driving unit of one phase, a driving signal according to the driving control signal when the circuit in which the thyristor is located is powered on includes:

through the operation module, when the thyristor is electrified, the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located indicates that the thyristor module of one phase in the circuit where the thyristor is located does not have a fault, and the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the drive control signal are subjected to AND operation to obtain an operation result which is used as the drive control signal of the thyristor module of one phase in the circuit where the thyristor is located;

isolating the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located through an isolation module to obtain a driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located;

generating a driving signal according to a driving isolation signal of a thyristor module of one phase in a circuit where the thyristor is located through a driving module;

regenerating the drive signal from the drive control signal and the fault feedback signal by one phase of the drive unit, comprising:

through the operation module, after the thyristor is electrified, carrying out AND operation on the fault feedback signal of the thyristor module of one phase in the circuit where the thyristor is located and the drive control signal to obtain an operation result which is used as the drive control signal of the thyristor module of one phase in the circuit where the thyristor is located;

the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located is also isolated through an isolation module to obtain the driving isolation signal of the driving control signal of the thyristor module of one phase in the circuit where the thyristor is located;

and generating a driving signal according to the thyristor module of one phase in the circuit in which the thyristor is located through the driving module according to the driving isolation signal of the thyristor module of one phase in the circuit in which the thyristor is located.

11. The method for controlling driving of a thyristor according to claim 9 or 10, wherein detecting, by the fault detection unit for one phase, a current voltage of a thyristor module for one phase in a circuit in which the thyristor is located after the thyristor is powered on, and outputting a fault feedback signal according to the current voltage, comprises:

through a sampling module, after the thyristor is electrified, the current voltage of a thyristor module of one phase in a circuit where the thyristor is located is detected;

through a comparison module, under the condition that a phase of thyristor module in the circuit where the thyristor is located is in a conduction interval, if the current voltage is a first set voltage value, determining that the phase of thyristor module in the circuit where the thyristor is located is normally conducted; if the current voltage is not the first set voltage value, determining that a thyristor module of one phase in the circuit where the thyristor is located is in fault, and outputting a fault signal that the thyristor module of one phase in the circuit where the thyristor is located is in fault;

through an output module, under the condition that a phase thyristor module in a circuit where the thyristor is located is in a conduction interval, if one phase thyristor module in at least one phase thyristor module in the circuit where the thyristor is located has a fault, outputting a first fault signal; under the condition that one phase of thyristor module in the circuit where the thyristor is located is in a cut-off interval, if all the phase of thyristor modules in at least one phase of thyristor module in the circuit where the thyristor is located have faults, outputting a second fault signal; and combining the first fault signal and the second fault signal to output a fault feedback signal.