CN113364246B

CN113364246B - Drive control device and method for thyristors

Info

Publication number: CN113364246B
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: 2023-07-25
Anticipated expiration: 2041-07-08
Also published as: CN113364246A

Abstract

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

Description

Drive control device and method for thyristors

Technical Field

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

Background

Along with the development of power electronic technology, the thyristor is widely applied, 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, non-contact electronic switches, inversion, frequency conversion and the like.

During the operation of the circuit (such as a three-phase controllable rectifying circuit) where the thyristor is located, the thyristor may malfunction (such as the thyristor is damaged and cannot be normally turned on or turned off, etc.), and if the thyristor is used in a normal operation mode, other elements of the circuit (such as the three-phase controllable rectifying circuit) where the thyristor is located may be damaged.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention aims to provide a drive control device and a drive control method for a thyristor, which aim to solve the problem that if a circuit in which the thyristor is positioned is still used according to a normal working mode under the condition that the thyristor is in fault, other elements of the circuit in which the thyristor is positioned can be damaged, and the safety of the circuit in which the thyristor is positioned is affected, so that the effect of improving the safety of the circuit in which the thyristor is positioned can be achieved by detecting whether the thyristor is in fault or not and performing fault protection when the thyristor is in fault.

The invention provides a drive control device of a thyristor, wherein a circuit in which the thyristor is positioned comprises: at least one phase thyristor module; the drive control device of the thyristor comprises: a fault detection unit, a control unit and a driving unit; wherein the control unit is configured to transmit a drive control signal; the driving control signal is a signal generated by a driving signal for controlling a thyristor module in a circuit where the thyristor is positioned; the number of the driving units is the same as the number of the thyristor modules in the circuit where the thyristors are located; the drive unit is configured to generate a drive signal according to the drive control signal when the circuit in which the thyristor is positioned is powered on so as to drive a phase thyristor module in the circuit in which the thyristor is positioned; the driving signal is a signal for driving a phase thyristor module in a circuit where the thyristor is positioned to be turned on or turned off; the number of the fault detection units is the same as the number of the thyristor modules in the circuit where the thyristors are located; the fault detection unit is configured to detect the current voltage of a one-phase thyristor module in a circuit where the thyristor is located after the thyristor is electrified, and output a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a one-phase thyristor module in a circuit where the thyristor is located has a fault or not; and the 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 in which the thyristor is positioned to be turned off under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit in which the thyristor is positioned is faulty.

In some embodiments, the driving unit includes: the device comprises an operation module, an isolation module and a driving module; wherein, a phase of the drive unit, when the circuit in which the thyristor is located is powered on, generates a drive signal according to the drive control signal, including: the operation module is configured to, when the thyristor is powered on, indicate that the one-phase thyristor module in the circuit where the thyristor is located has no fault by using a fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located, and perform an AND operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located and the driving control signal to obtain an operation result, and the operation result is used as a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located; the isolation module is configured to isolate a driving control signal of a one-phase thyristor module in the circuit where the thyristor is located, so as to obtain a driving isolation signal of the driving control signal of the one-phase thyristor module in the circuit where the thyristor is located; the driving module is configured to generate a driving signal according to a one-phase thyristor module in the circuit where the thyristor is located according to a driving isolation signal of the one-phase thyristor module in the 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 an AND operation on the fault feedback signal of the one-phase thyristor module 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 a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located; the isolation module is further configured to isolate a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located, so as to obtain a driving isolation signal of the driving control signal of the one-phase thyristor module in the circuit where the thyristor is located; the driving module is further configured to generate a driving signal according to the one-phase thyristor module in the circuit where the thyristor is located according to the driving isolation signal of the one-phase thyristor module in the circuit where the thyristor is located.

In some embodiments, the isolation module comprises: an optocoupler isolation circuit; the driving module includes: and driving the chip driving circuit.

In some embodiments, the fault detection unit includes: the device comprises a sampling module, a comparison module and an output module; the fault detection unit for one phase detects the current voltage of a thyristor module in a circuit where the thyristor is located after the thyristor is electrified, and outputs a fault feedback signal according to the current voltage, and the fault detection unit comprises: the sampling module is configured to detect the current voltage of a one-phase thyristor module in a circuit where the thyristor is located after the thyristor is powered on; the comparison module is configured to determine that the one-phase thyristor module in the circuit in which the thyristor is located is normally turned on if the current voltage is a first set voltage value under the condition that the one-phase thyristor module in the circuit in which the thyristor is located is in a conduction interval; if the current voltage is not the first set voltage value, determining that a one-phase thyristor module in a circuit where the thyristor is located is failed, and outputting a failure signal of the one-phase thyristor module in the circuit where the thyristor is located; under the condition that a one-phase thyristor module in a 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 one-phase thyristor module in the circuit where the thyristor is located has a fault, and outputting a fault signal that the one-phase thyristor module in the circuit where the thyristor is located has a fault; if the current voltage is not the second set voltage value, determining that a one-phase thyristor module in a circuit where the thyristor is positioned 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 is located in a conducting interval in the circuit where the thyristor is located; outputting a second fault signal if all the phase thyristor modules fail in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the phase thyristor module is located in a cut-off interval in the circuit where the thyristor is located; 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 rectifying module, a filtering module and an operational amplifier module; after the thyristor is powered on, the sampling module detects the current voltage of a phase thyristor module in a circuit where the thyristor is located, and the sampling module comprises: the arrangement module is configured to process a current signal corresponding to voltage drop at two ends of a one-phase thyristor module in a circuit where the thyristor is positioned so as to obtain a positive voltage as a positive voltage signal; the filtering module is configured to filter the rectification signal to obtain a filtered signal; 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 one-phase thyristor module in a circuit where the thyristor is located.

In some embodiments, the comparison module comprises: a comparator; the current voltage of a one-phase thyristor module in the circuit where the thyristor is positioned is output to the inverting input end of the comparator; under the condition that a one-phase thyristor module is in a conduction interval in a circuit where the thyristor is located, the non-inverting input end of the comparator is used for inputting the first set voltage value; and under the condition that a one-phase thyristor module is in a cut-off interval in a circuit where the thyristor is positioned, 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 NOR gate module, the first AND gate module and the second AND gate module; the NOR gate 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 is located in a conducting interval in the circuit where the thyristor is located; the first AND gate module is configured to output a second fault signal if all phase thyristor modules in at least one phase thyristor module in the circuit where the thyristor is located are faulty under the condition that one phase thyristor module in the circuit where the thyristor is located in a cut-off interval; the second AND gate module is configured to combine the first fault signal and the second fault signal and output a fault feedback signal.

In accordance with the present invention, there is provided a method for controlling driving of a thyristor, the circuit in which the thyristor is located, comprising: at least one phase thyristor module; the driving control method of the thyristor comprises the following steps: transmitting a drive control signal; the driving control signal is a signal generated by a driving signal for controlling a thyristor module in a circuit where the thyristor is positioned; the 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 a phase thyristor module in a circuit where the thyristor is positioned to be turned on or turned off; the number of the driving units is the same as the number of the thyristor modules in the circuit where the thyristors are located; the device comprises a thyristor module, a phase fault detection unit, a fault feedback unit and a control unit, wherein the thyristor module is used for detecting the current voltage of the phase thyristor module in a circuit where the thyristor is positioned after the thyristor is electrified, and outputting a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a one-phase thyristor module in a circuit where the thyristor is located has a fault or not; the number of the fault detection units is the same as the number of the thyristor modules in the circuit where the thyristors are located; and regenerating the driving signal by the driving unit 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 in which the thyristor is positioned under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit in which the thyristor is positioned is faulty.

In some embodiments, when the circuit in which the thyristor is located is powered up by the driving unit, the driving unit generates a driving signal according to the driving control signal, including: when the thyristor is powered on, the operation module performs AND operation on the fault feedback signal of the one-phase thyristor module in the circuit of the thyristor and the driving control signal to obtain an operation result, wherein the fault feedback signal of the one-phase thyristor module in the circuit of the thyristor is used as the driving control signal of the one-phase thyristor module in the circuit of the thyristor; isolating a driving control signal of a one-phase thyristor module in a circuit where the thyristor is positioned through an isolation module to obtain a driving isolation signal of the driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned; generating a driving signal according to a one-phase thyristor module in a circuit where the thyristor is located by a driving module according to a driving isolation signal of the one-phase thyristor module in the circuit where the thyristor is located; regenerating, by the drive unit of one phase, the drive signal according to the drive control signal and the fault feedback signal, comprising: through an operation module, after the thyristor is electrified, performing AND operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is positioned and the driving control signal to obtain an operation result which is used as a driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned; the isolation module is used for isolating the driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned, so as to obtain a driving isolation signal of the driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned; and the driving module is used for generating a driving signal according to the one-phase thyristor module in the circuit where the thyristor is positioned according to the driving isolation signal of the one-phase thyristor module in the circuit where the thyristor is positioned.

In some embodiments, after the thyristor is powered up, the fault detection unit detects a current voltage of a phase thyristor module in a circuit where the thyristor is located, and outputs a fault feedback signal according to the current voltage, including: after the thyristor is electrified, detecting the current voltage of a one-phase thyristor module in a circuit where the thyristor is positioned through a sampling module; through a comparison module, under the condition that a one-phase thyristor module in a circuit where the thyristor is located is in a conducting interval, if the current voltage is a first set voltage value, determining that the one-phase 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 one-phase thyristor module in a circuit where the thyristor is located is failed, and outputting a failure signal of the one-phase thyristor module in the circuit where the thyristor is located; under the condition that a one-phase thyristor module in a 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 one-phase thyristor module in the circuit where the thyristor is located has a fault, and outputting a fault signal that the one-phase thyristor module in the circuit where the thyristor is located has a fault; if the current voltage is not the second set voltage value, determining that a one-phase thyristor module in a circuit where the thyristor is positioned is normally conducted; through the output module, under the condition that one phase thyristor module in the circuit where the thyristor is located in a conducting interval, if one phase thyristor module in at least one phase thyristor module in the circuit where the thyristor is located fails, a first failure signal is output; outputting a second fault signal if all the phase thyristor modules fail in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the phase thyristor module is located in a cut-off interval in the circuit where the thyristor is located; 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 arranged, so that whether the thyristor breaks down or not is detected by the fault detection circuit, and a fault signal is fed back to the driving circuit of the thyristor by the fault feedback circuit when the thyristor breaks down, so that fault protection is performed; 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 scheme of the invention is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of a driving control device of a thyristor according to an embodiment of the invention;

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

FIG. 3 is a schematic diagram of an embodiment of a thyristor drive device according to the present invention;

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

FIG. 5 is a flow chart of a method for controlling the driving of a thyristor according to an embodiment of the invention;

FIG. 6 is a flow chart of an embodiment of generating a driving signal when the circuit of the thyristor is powered up in the method of the invention;

FIG. 7 is a flow chart of an 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 flow chart of an embodiment of outputting a fault feedback signal after the thyristor is powered up in the method of the 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 specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

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

Wherein the control unit is configured to transmit a drive control signal. The driving control signal is a signal generated by a driving signal for controlling a thyristor module in a circuit where the thyristor is located.

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

The number of the fault detection units is the same as the number of the thyristor modules in the circuit where the thyristors are located. And the fault detection unit is configured to detect the current voltage of a one-phase thyristor module in a circuit where the thyristor is positioned 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 one-phase thyristor module in a circuit where the thyristor is located has a fault.

And the 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 in which the thyristor is positioned to be turned off under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit in which the thyristor is positioned is faulty. And under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit where the thyristor is positioned does not have a fault, controlling the one-phase thyristor module in the circuit where the thyristor is positioned to work normally.

Specifically, the control unit of one phase is further configured to perform an and operation on the control signal and the fault feedback signal to generate a driving control signal, so that no driving signal is output under the condition that the fault feedback signal indicates that the one-phase thyristor module in the thyristor has a fault, and the one-phase thyristor module 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 detection signals to an input circuit part to perform relevant fault protection actions, the fault feedback detection is timely, the protection can be timely carried out after the fault occurs, the fault detection problem of the thyristor when the fault occurs is solved, and the fault feedback and circuit protection problem under the condition of the thyristor fault is 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, such as an optocoupler isolation circuit. The driving module, such as a driving chip driving circuit.

Wherein, a phase of the drive unit, when the circuit in which the thyristor is located is powered on, generates a drive signal according to the drive control signal, including:

the operation module is configured to, when the thyristor is powered on, indicate that the one-phase thyristor module in the circuit where the thyristor is located has no fault by using a fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located, and perform an AND operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located and the driving control signal to obtain an operation result, and the operation result is used as a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located.

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

The driving module is configured to generate a driving signal according to a one-phase thyristor module in the circuit where the thyristor is located according to a driving isolation signal of the one-phase thyristor module in the 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 an AND operation on the fault feedback signal of the one-phase thyristor module 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 a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located.

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

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

The scheme of the invention provides the thyristor driving device with fault detection and feedback, which has better driving capability, ensures that the thyristor fault feedback detection is more timely, and can timely feed back fault signals to an input circuit to perform relevant fault protection actions.

In some embodiments, the isolation module comprises: an optocoupler isolation circuit. The driving module includes: and driving the chip driving circuit.

The thyristor driving device with fault detection and feedback provided by the scheme of the invention adopts the driving mode of the optocoupler and the driving chip, can effectively improve the driving capability of the driving circuit of the thyristor, and solves the problem that the thyristor has weak driving capability in certain driving modes. In the related scheme, the driving mode of the optocoupler may have a problem of insufficient driving capability. In the scheme of the invention, a driving mode of an optocoupler and a driving chip is adopted to improve the driving capability of the circuit.

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

And the signal input circuit can input a driving control signal of the thyristor into the operation circuit, and the other end of the operation circuit is connected with a fault feedback signal fed back by the fault detection circuit. The output end of the operation circuit is connected into the optocoupler isolation circuit. And the output end of the optical coupler isolation circuit is connected with the driving circuit of the driving chip. 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 is used for judging whether the thyristor has faults or not mainly by detecting voltages at two ends of the thyristor.

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

The fault detection unit for one phase detects the current voltage of a thyristor module in a circuit where the thyristor is located after the thyristor is electrified, and outputs a fault feedback signal according to the current voltage, and the fault detection unit comprises:

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

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

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

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

The second set voltage value may be 0V. That is, if the current voltage is 0, determining that a phase thyristor module in the thyristor circuit fails, and outputting a failure signal that the phase thyristor module in the thyristor circuit fails; and if the current voltage is not 0, determining that the one-phase 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 is located in a conducting interval in the circuit where the thyristor is located. And under the condition that one phase of thyristor module in the circuit where the thyristor is positioned in a cut-off interval, outputting a second fault signal if all phase of thyristor modules fail in at least one phase of thyristor module in the circuit where the thyristor is positioned. 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 the 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 timely and effectively detected, and the fault detection can be timely and effectively carried out when the thyristor breaks down, and whether the thyristor breaks down or not can be timely and effectively detected. For example: the fault detection circuit samples voltages at two ends of the thyristor mainly through the sampling circuit, and the sampled voltage value judges whether the two ends of the thyristor are 0 through the comparator, so that the fault condition of the thyristor is judged.

When the fault detection circuit detects that the thyristor fails, a fault signal can be timely fed back and input into the driving circuit through the fault feedback circuit, and circuit protection measures are started. Thus, after the thyristor fault is detected, a fault feedback signal is timely input to the driving circuit. For example: the fault feedback circuit adopts a mode of performing AND operation on the fault feedback signal and the driving signal, and can timely stop outputting the driving signal of each phase of thyristor when the thyristor fails, so that the thyristor is prevented from being damaged in a larger range.

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

step 1, when a circuit in which the thyristor is positioned is just electrified, a fault feedback signal of the thyristor is initially 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 an optocoupler 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 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 optocoupler 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 driving control signal are subjected to AND operation through the operation circuit, so that all phase thyristors are free of gate driving signal input, and the thyristors which are not damaged in other phases are prevented from being continuously conducted to cause larger damage under the fault condition.

When the thyristor is in the off interval:

if the voltage at two ends of the thyristor is not 0 (ignoring the conduction voltage drop of the thyristor), the thyristor is normally turned off, if the voltage at two ends of the thyristor is 0 (ignoring 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 all phase thyristors have no gate driving signal input, and the thyristors which are not damaged in other phases are prevented from being continuously conducted under the fault condition to cause larger damage.

In some embodiments, the sampling module comprises: the device comprises a rectifying module, a filtering module and an operational amplifier module. A finishing module such as a rectifier bridge DB. A filtering module, such as an RC filtering module. 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 phase thyristor module in a circuit where the thyristor is located, and the sampling module comprises:

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

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

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 one-phase thyristor module in a circuit where the thyristor is located.

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

In some embodiments, the output module comprises: the system comprises a NOR gate module, a first AND gate module and a second AND gate module. Nor gate modules, such as nor gate U1. A first and gate module, such as and gate U2. 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 is located in a conducting interval in the circuit where the thyristor is located. And under the condition that one phase of thyristor module in the circuit where the thyristor is positioned in a cut-off interval, outputting a second fault signal if all phase of thyristor modules fail in at least one phase of thyristor module in the circuit where the thyristor is positioned. And combining the first fault signal and the 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 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 is located in a conducting interval in the circuit where the thyristor is located.

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

The second AND gate module is configured to combine the first fault signal and the second fault signal and output a fault feedback 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, for example, 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 an and gate U3. An arithmetic circuit comprising: and each phase of operation circuit such as a U-phase operation circuit, a V-phase operation circuit, a W-phase operation circuit and the like. The U-phase operation circuit comprises an AND gate U6, the V-phase operation circuit comprises an AND gate U5, and the W-phase operation circuit comprises an AND gate U4. An optocoupler isolation circuit comprising: the U-phase optocoupler isolation circuit, the V-phase optocoupler isolation circuit and the W-phase optocoupler 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 OC1. A driver chip driver circuit comprising: u-phase driving chip, V-phase driving chip and W-phase driving chip. The circuit where the thyristor is located, such as the circuit where the three-phase thyristor is located. The circuit in which the three-phase thyristor is arranged consists 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 driving control signal are output to the optical coupler OC3 after passing through the AND gate U6, and the optical coupler OC3 is isolated and then output to the U-phase driving chip. And a 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 the thyristor S1 is connected to the cathode of the 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 driving control signal are output to the optical coupler OC2 after passing through the AND gate U5, and the optical coupler OC2 is isolated and then output to the V-phase driving chip. And a 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 the thyristor S2 is connected to the cathode of the diode D2. The anode of the diode D2 is connected to the cathode of the electrolytic capacitor C1.

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

The fault detection circuit can detect whether each phase of thyristor in the circuit where the thyristor is located is faulty. For example: taking W-phase as an example, the fault detection circuit can detect whether the W-phase thyristor has failed. The cathode of the thyristor S3 is connected to the first input of the rectifier bridge DB. An anode of the thyristor S3 is connected to a second input of the 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 filter module formed by a resistor R1 and a capacitor C2 and passing through an operational amplifier module and a comparator A2. The output of nor gate U1 and the output of and gate U2 are input to and gate U3, respectively. An operational amplifier module comprising: operational amplifier A1, resistor R2, resistor R3, resistor R4, and resistor R5. The first output end of the RC filter module is connected to the inverting input end of the operational amplifier A1 through a resistor R2. The second output end of the RC filter 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 the resistor R5. The noninverting input end of the operational amplifier A1 is grounded through a resistor R4. The non-inverting input of comparator A2 is grounded. The output end of the comparator A2 is output to the NOR gate U1 in the thyristor conducting interval and output to the AND gate U2 in the thyristor cut-off interval.

The primary function of the rectifier bridge DB here is to ensure that the output is positive, since the voltage across the thyristor is variable when it is turned off, and may be positive or negative, and the output when compared with the comparator is the same as the output when the voltage across the comparator is 0, thus failing to achieve the detection effect. The RC filter module formed by the resistor R1 and the capacitor C2 performs filtering when the rectifier bridge plays a role in rectification.

In a specific embodiment of the thyristor driving device according to the scheme of the present invention shown in fig. 4, when the thyristor is in the on-state, if the thyristor is normally turned on, the voltage at both ends is 0 (ignoring the conduction voltage drop of the thyristor), the sampling circuit outputs 0 and then outputs a low level through the comparator, outputs a high level through the nor gate, outputs a high level through the and operation, and finally outputs a high level and a driving signal for the and operation, so that the normal output of the driving signal is not affected. If the thyristor fails and is abnormally conducted, the voltage at two ends is not 0, a sampling signal is output after passing through the sampling circuit, a high level is output after passing through the comparator, a low level is output after passing through the NOR operation, a low level is output after passing through 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.

When the thyristor is in the cut-off interval, if the thyristor is normally cut-off, the voltage at two ends is not 0 (neglecting the conduction voltage drop of the thyristor), the sampling signal is output after passing through the sampling circuit, and then the high level is output after passing through the comparator. After AND operation, the high level is output, then the high level is output continuously through an AND operation, and finally the high level and the driving signal are output for AND operation, so that the normal output of the driving signal is not affected. If the thyristor fails and is not normally turned off, the voltage at two ends is 0, a sampling signal is output after passing through the sampling circuit, a low level is output after passing through the comparator, a low level is output after passing through the AND operation, and finally the AND operation is performed with 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 schematically relates to a fault detection circuit of one phase, but the scheme of the invention is applied to each phase, so that the fault detection circuit can detect and feed back to the input part when each phase thyristor fails. In addition, the scheme of the invention is not limited to the parameters designed by the examples, 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 samples the voltages at the two ends of the thyristor through the sampling circuit to judge whether the circuit has faults or not, for example, the sampling circuit samples the voltages at the two ends of the thyristor and then judges whether the thyristor has faults or not through the operation circuit. The fault detection result can be timely fed back to the input circuit, if the thyristor fails, the output of all the gate driving signals of the thyristor is stopped, and if the thyristor fails, the fault detection result is fed back to the input circuit for relevant fault protection action. The thyristor driving device has good driving capability, and can timely detect faults when the thyristor breaks down and feed back detection signals to the input circuit part to perform 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 arranged, the fault detection circuit is used for detecting whether the thyristor has a fault or not, and the fault feedback circuit is used for feeding a fault signal back to the driving circuit of the thyristor when the thyristor has the fault so as to perform 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, there is further provided a method for controlling the driving of a thyristor corresponding to a circuit in which the thyristor is located, as shown in fig. 5, which is a schematic flow chart of an embodiment of the method of the present invention. The circuit in which 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 generated by a driving signal for controlling a thyristor module in a circuit where the thyristor is located.

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

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

At 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 turn-off of the one-phase thyristor module in the circuit in which the thyristor is located under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit in which the thyristor is located has a fault. And under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit where the thyristor is positioned does not have a fault, controlling the one-phase thyristor module in the circuit where the thyristor is positioned to work normally.

The fault detection unit is arranged between the thyristor and the control unit. The control unit can drive the thyristor through the driving unit. And a fault detection unit such as a fault detection circuit. A control unit such as an arithmetic circuit. And driving units such as optocoupler isolation circuits and driver chip driving circuits.

In some embodiments, step S120 includes 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 up, which is described in the following exemplary description.

The following is a schematic flow chart of an embodiment of generating a driving signal when the circuit of the thyristor is powered up in the method of the invention in connection with fig. 6, further describing a specific process of generating a driving signal when the circuit of the thyristor is powered up in step S120, including: step S210 to step S230.

Step S210, when the thyristor is powered on, the operation module performs an and operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located and the driving control signal to obtain an operation result, wherein the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located and the driving control signal indicate that the one-phase thyristor module in the circuit where the thyristor is located has no fault, and the operation result is used as the driving control signal of the one-phase thyristor module in the circuit where the thyristor is located.

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

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

In some embodiments, the step S140 is a specific process of regenerating the driving signal by the driving unit according to the driving control signal and the fault feedback signal, see the following exemplary description.

In the following, a flowchart of an embodiment of the method of the present invention for regenerating the driving signal according to the driving control signal and the fault feedback signal in conjunction with fig. 7 is further described, where the specific process of regenerating the driving signal according to the driving control signal and the fault feedback signal in step S140 includes: step S310 to step S330.

Step S310, further performing an and operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located and the driving control signal through the operation module after the thyristor is powered on, to obtain an operation result, which is used as a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located.

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

Step S330, generating, by the driving module, a driving signal according to the one-phase thyristor module in the circuit in which the thyristor is located according to the driving isolation signal of the one-phase thyristor module in the circuit in which the thyristor is located.

The operation module is an operation circuit. The isolation module, such as an optocoupler isolation circuit. The driving module, such as a driving chip driving circuit. The scheme of the invention provides the thyristor driving device with fault detection and feedback, which has better driving capability, ensures that the thyristor fault feedback detection is more timely, and can timely feed back fault signals to an input circuit to perform relevant fault protection actions.

In some embodiments, in step S130, after the thyristor is powered up, the fault detection unit detects the current voltage of a phase thyristor module in the circuit where the thyristor is located, and outputs a fault feedback signal according to the current voltage, which is described in the following exemplary embodiments.

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

Step S410, detecting, by the sampling module, a current voltage of a phase thyristor module in a circuit where the thyristor is located after the thyristor is powered on.

Step S420, through the comparison module, if the current voltage is the first set voltage value under the condition that the one-phase thyristor module in the circuit where the thyristor is located is in the conducting interval, determining that the one-phase 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 phase thyristor module in a circuit where the thyristor is located is faulty, and outputting a fault signal that the phase thyristor module in the circuit where the thyristor is located is faulty. The first set voltage value may be 0V.

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

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

step 1, when a circuit in which the thyristor is positioned is just electrified, a fault feedback signal of the thyristor is initially 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 an optocoupler 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 off interval:

Therefore, in the thyristor driving method provided by the scheme of the invention, the fault detection circuit mainly samples the voltages at the two ends of the thyristor through the sampling circuit to judge whether the circuit has faults or not, for example, the sampling circuit samples the voltages at the two ends of the thyristor and then judges whether the thyristor has faults or not through the operation circuit. The fault detection result can be timely fed back to the input circuit, if the thyristor fails, the output of all the gate driving signals of the thyristor is stopped, and if the thyristor fails, the fault detection result is fed back to the input circuit for relevant fault protection action. The thyristor driving device has good driving capability, and can timely detect faults when the thyristor breaks down and feed back detection signals to the input circuit part to perform relevant fault protection actions.

Since the processing and the functions implemented by the method of the present embodiment basically correspond to the embodiments, principles and examples of the circuit where the thyristor is located, the description of the present embodiment is not exhaustive, and reference may be made to the related description of the foregoing embodiment, which is not repeated herein.

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 arranged, the fault detection circuit is used for detecting whether the thyristor has a fault or not, and a fault signal is fed back to the driving circuit of the thyristor by the fault feedback circuit when the thyristor has a fault so as to carry out fault protection, and the fault detection can be timely carried out when the thyristor has a fault, so that whether the thyristor has a fault or not can be timely and effectively detected; the thyristor fault feedback detection is more timely, and fault signals can be timely fed back to the input circuit to perform relevant fault protection actions.

In summary, it is readily understood by those skilled in the art that the above-described advantageous ways 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, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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 drive control device for a thyristor, wherein a circuit in which the thyristor is located includes: at least one phase thyristor module; the drive control device of the thyristor comprises: a fault detection unit, a control unit and a driving unit; wherein,,

the control unit is configured to send a driving control signal; the driving control signal is a signal generated by a driving signal for controlling a thyristor module in a circuit where the thyristor is positioned;

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

the number of the fault detection units is the same as the number of the thyristor modules in the circuit where the thyristors are located; the fault detection unit is configured to detect the current voltage of a one-phase thyristor module in a circuit where the thyristor is located after the thyristor is electrified, and output a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a one-phase thyristor module in a circuit where the thyristor is located has a fault or not;

And the 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 in which the thyristor is positioned to be turned off under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit in which the thyristor is positioned 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 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 driving unit comprises:

the operation module is configured to, when the thyristor is powered on, indicate that the one-phase thyristor module in the circuit where the thyristor is located has no fault by using a fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located, and perform an AND operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is located and the driving control signal to obtain an operation result, and the operation result is used as a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located;

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

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

the operation module is further configured to perform an AND operation on the fault feedback signal of the one-phase thyristor module 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 a driving control signal of the one-phase thyristor module in the circuit where the thyristor is located;

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

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

4. A 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 fault detection unit detects the current voltage of a one-phase thyristor module 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 the fault detection unit comprises:

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

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

Under the condition that a one-phase thyristor module in a 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 one-phase thyristor module in the circuit where the thyristor is located has a fault, and outputting a fault signal that the one-phase thyristor module in the circuit where the thyristor is located has a fault; if the current voltage is not the second set voltage value, determining that a one-phase thyristor module in a circuit where the thyristor is positioned 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 is located in a conducting interval in the circuit where the thyristor is located; outputting a second fault signal if all the phase thyristor modules fail in at least one phase thyristor module in the circuit where the thyristor is located under the condition that the phase thyristor module is located in a cut-off interval in the circuit where the thyristor is located; and combining the first fault signal and the second fault signal to output a fault feedback signal.

5. The drive control device of a thyristor according to claim 4, wherein the sampling module comprises: the device comprises a rectifying module, a filtering module and an operational amplifier module; wherein,,

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

the rectifying module is configured to process a current signal corresponding to voltage drop at two ends of a one-phase thyristor module in a circuit where the thyristor is positioned so as to obtain a positive voltage as a positive voltage signal;

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

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

7. The drive control device of a thyristor according to claim 4, wherein the output module comprises: the NOR gate module, the first AND gate module and the second AND gate module; wherein,,

the NOR gate 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 is located in a conducting interval in the circuit where the thyristor is located;

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

8. A circuit in which a thyristor resides, comprising: a drive control device for a thyristor as claimed in any one of claims 1 to 7.

9. The drive control method of the thyristor is characterized in that a circuit in which the thyristor is positioned comprises: at least one phase thyristor module; the driving control method of the thyristor comprises the following steps:

Transmitting a drive control signal; the driving control signal is a signal generated by a driving signal for controlling a thyristor module in a circuit where the thyristor is positioned;

the 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 a phase thyristor module in a circuit where the thyristor is positioned to be turned on or turned off; the number of the driving units is the same as the number of the thyristor modules in the circuit where the thyristors are located;

the device comprises a thyristor module, a phase fault detection unit, a fault feedback unit and a control unit, wherein the thyristor module is used for detecting the current voltage of the phase thyristor module in a circuit where the thyristor is positioned after the thyristor is electrified, and outputting a fault feedback signal according to the current voltage; the fault feedback signal is a signal for indicating whether a one-phase thyristor module in a circuit where the thyristor is located has a fault or not; the number of the fault detection units is the same as the number of the thyristor modules in the circuit where the thyristors are located;

and regenerating the driving signal by the driving unit 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 in which the thyristor is positioned under the condition that the fault feedback signal indicates that the one-phase thyristor module in the circuit in which the thyristor is positioned is faulty.

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

when the thyristor is powered on, the operation module performs AND operation on the fault feedback signal of the one-phase thyristor module in the circuit of the thyristor and the driving control signal to obtain an operation result, wherein the fault feedback signal of the one-phase thyristor module in the circuit of the thyristor is used as the driving control signal of the one-phase thyristor module in the circuit of the thyristor;

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

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

Regenerating, by the drive unit of one phase, the drive signal according to the drive control signal and the fault feedback signal, comprising:

through an operation module, after the thyristor is electrified, performing AND operation on the fault feedback signal of the one-phase thyristor module in the circuit where the thyristor is positioned and the driving control signal to obtain an operation result which is used as a driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned;

the isolation module is used for isolating the driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned, so as to obtain a driving isolation signal of the driving control signal of the one-phase thyristor module in the circuit where the thyristor is positioned;

and the driving module is used for generating a driving signal according to the one-phase thyristor module in the circuit where the thyristor is positioned according to the driving isolation signal of the one-phase thyristor module in the circuit where the thyristor is positioned.

11. The method according to claim 9 or 10, wherein detecting, by the one-phase fault detection unit, a current voltage of a one-phase thyristor module 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:

After the thyristor is electrified, detecting the current voltage of a one-phase thyristor module in a circuit where the thyristor is positioned through a sampling module;

through a comparison module, under the condition that a one-phase thyristor module in a circuit where the thyristor is located is in a conducting interval, if the current voltage is a first set voltage value, determining that the one-phase 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 one-phase thyristor module in a circuit where the thyristor is located is failed, and outputting a failure signal of the one-phase thyristor module in the circuit where the thyristor is located;

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