Driving device and system of switching device

Abstract

The invention discloses a driving device and system of a switching device, and relates to the field of device driving. A frequency division module outputs a clock signal to a driving signal processing module; the driving signal processing module converts a first driving signal received by an input end into an on signal or an off signal based on a clock signal received by a clock end; a control switch corresponding to the transformer is used for being switched on when receiving an on signal and switched off when receiving a off signal, and the transformer is used for boosting and outputting the voltage output by the power supply when the corresponding control switch is switched on so as to drive the switching device to be switched on, and does not work when the corresponding control switch is switched off so as to control the switching device to be switched off. The frequency multiplication signal is set as the clock signal, and the frequencies of the on signal and the off signal are equal to the frequency of the clock signal, so that the signal transmission efficiency can be improved, and the signal delay is reduced. The transformer drives the switching device to generate a high-voltage driving signal so as to drive the switching device, and the isolation effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of device driving, and in particular to a driving device and system for a switching device. Background Art

[0002] Common isolated driver devices often use isolated optocouplers or driver chips based on optocouplers. Not only should the insulation withstand voltage of the driver chip be taken into consideration, but also an isolated power supply should be configured. In addition, another important parameter of the optocoupler - the cutoff bandwidth is also an important factor limiting the isolation application. When the optocoupler transmits the first drive signal, the rising and falling edges will be affected by the switching speed of the transistor integrated in the optocoupler, which will cause the hysteresis of the first drive signal. Summary of the invention

[0003] The purpose of the present invention is to provide a driving device and system for a switching device, which can improve the transmission efficiency of the signal and reduce the signal hysteresis by setting a frequency-multiplied signal as a clock signal. The switching device is driven by a transformer to generate a high-voltage driving signal to drive the switching device, and the isolation function can be achieved.

[0004] In order to solve the above technical problems, the present invention provides a driving device for a switching device, comprising:

[0005] A frequency division module, wherein the output terminal of the frequency division module is connected to the clock terminal of the driving signal processing module, and is used to output a clock signal to the driving signal processing module, wherein the frequency of the clock signal is 2N times the conduction frequency of the switching device, where N is a positive integer;

[0006] The driving signal processing module, wherein the input end of the driving signal processing module is connected to the first driving signal, and the driving signal processing module is used to convert the first driving signal received at the input end into an on signal or an off signal based on the clock signal received at the clock end, and the frequency of the on signal and the off signal is equal to the frequency of the clock signal;

[0007] The first end of the primary coil of the transformer is connected to the power supply, the second end of the primary coil is connected to the first end of the corresponding control switch, the control end of the control switch corresponding to the transformer is connected to the output end of the drive signal processing module, the second end of the control switch corresponding to the transformer is grounded, the first end of the secondary coil of the transformer is connected to the control end of the switching device, the first end of the switching device is connected to the power supply, the second end of the switch coil and the second end of the secondary coil are both grounded, the control switch corresponding to the transformer is used to turn on when receiving the on signal, and turn off when receiving the off signal, the transformer is used to output the voltage output by the power supply after boosting when the corresponding control switch is turned on, so as to drive the switching device to turn on, and not work when the corresponding control switch is turned off, so as to control the switching device to turn off.

[0008] On the other hand, it also includes an undervoltage monitoring module;

[0009] The collection end of the undervoltage monitoring module is connected to the power supply, and the output end of the undervoltage monitoring module is connected to the input end of the drive signal processing module;

[0010] The undervoltage monitoring module is used to block the first driving signal from being input to the driving signal processing module when the voltage of the power supply is lower than a preset voltage.

[0011] On the other hand, it also includes a first XOR module and a first inverter;

[0012] The input end of the frequency division module is connected to a crystal oscillator, the local oscillator of the crystal oscillator is equal to the oscillation frequency of the switch device, the first driving signal is connected to the first input end of the XOR module, the first frequency-multiplied signal output by the first output end of the frequency division module is connected to the second input end of the XOR module, the output end of the first XOR module is connected to the input end of the first inverter, the output end of the first inverter is connected to the reset end of the frequency division module, and the frequency of the first frequency-multiplied signal is equal to the oscillation frequency of the switch device;

[0013] The first XOR module and the first inverter are used to reset the frequency division module according to the first driving signal and the first frequency multiplication signal, and the reset time is the same as the time when the first driving signal is received.

[0014] On the other hand, the driving signal processing module includes a first trigger, a second inverter and a driving signal conversion module;

[0015] The second output terminal of the frequency division module is connected to the input terminal of the first trigger, the third output terminal of the frequency division module is connected to the clock terminal of the first trigger, the first output terminal of the first trigger is connected to the clock terminal of the drive signal conversion module, the input terminal of the second inverter is connected to the first drive signal, the output terminal of the second inverter is connected to the input terminal of the drive signal conversion module, and the inverted output terminal of the drive signal is connected to the control circuit;

[0016] The first trigger is used to use the third frequency-multiplied signal output by the third output terminal of the frequency division module as a clock signal, and delay the second frequency-multiplied signal output by the second output terminal of the frequency division module to obtain a first clock signal. The frequency of the third frequency-multiplied signal is higher than the frequency of the second frequency-multiplied signal. The drive signal conversion module is used to analyze the first drive signal based on the first clock signal to obtain a second drive signal, and feed it back to the control circuit.

[0017] On the other hand, the driving signal processing module further includes a second XOR module and a second trigger;

[0018] A first input terminal of a second XOR module is connected to a positive phase output terminal of the driving signal processing module, a second input terminal of the second XOR module is connected to a second output terminal of the first trigger, an input terminal of the second trigger is connected to an output terminal of the first XOR module, a clock terminal of the second trigger is connected to a fourth output terminal of the frequency dividing module, and a first output terminal and a second output terminal of the second trigger are respectively connected to a control terminal of a control switch corresponding to the transformer;

[0019] The second XOR module is used to use the fourth frequency-multiplied signal output by the fourth output terminal of the frequency division module as a clock signal, perform XOR calculation on the inverted signal of the first clock signal output by the drive signal processing module and the inverted signal of the second drive signal output by the drive signal processing module, and output an open signal, the first output terminal of the second trigger is used to output a first open signal that performs a first delay on the open signal, and the second output terminal of the second trigger is used to output a second open signal that performs a second delay on the open signal, and the sum of the angles of the first delay and the second delay is 180 degrees;

[0020] The control switch corresponding to the transformer is specifically configured to be turned on when receiving the first on signal or the second on signal, and to be turned off when receiving the off signal.

[0021] On the other hand, the driving signal processing module further includes a third XOR module and a third trigger;

[0022] A first input terminal of a third XOR module is connected to an inverting output terminal of the driving signal processing module, a second input terminal of the third XOR module is connected to a second output terminal of the first trigger, an input terminal of the third trigger is connected to an output terminal of the third XOR module, a clock terminal of the third trigger is connected to a fourth output terminal of the frequency dividing module, and a first output terminal of the third trigger is connected to a control terminal of a control switch corresponding to the transformer;

[0023] The third XOR module is used to perform XOR calculation on the first clock signal output by the drive signal processing module and the inverted signal of the second drive signal output by the drive signal processing module, and output an adjustment signal. The first output end of the third trigger is used to output an off signal for performing a third delay on the adjustment signal, so as to control the control switch corresponding to the transformer to turn off.

[0024] On the other hand, the second output end of the third trigger is connected to the control end of the control switch corresponding to the transformer, and the second output end of the third trigger is used to output a boost signal for performing a fourth delay on the adjustment signal, so as to control the transformer to boost the output voltage of the power supply at a second ratio and output it to the switching device.

[0025] On the other hand, the transformer includes a first transformer, a second transformer, a switch transformer, a coupling module and a step-up transformer;

[0026] A first end of the primary coil of the first transformer is connected to a power supply, a second end of the primary coil of the first transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the first transformer is connected to a first on signal, a first end of the secondary coil of the first transformer is connected to a first input end of a coupling module, a first end of the primary coil of the second transformer is connected to a power supply, a second end of the primary coil of the second transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the second transformer is connected to a second on signal, a first end of the secondary coil of the second transformer is connected to a second input end of the coupling module, a first end of the primary coil of the boost transformer is connected to a power supply, a second end of the primary coil of the second transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the boost transformer is connected to the boost signal, a first end of the secondary coil of the boost transformer is connected to a primary intermediate tap of the second transformer, a first end of the primary coil of the off transformer is connected to a power supply, a second end of the primary coil of the off transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the off transformer is connected to the off signal, a first end of the secondary coil of the off transformer is connected to an output end of the coupling module and a common end connected thereto is connected to a control end of the switch device;

[0027] The control switch corresponding to the first transformer is used to be turned on when the first turn-on signal is received, and the first transformer is used to boost the voltage output by the power supply when the corresponding control switch is turned on. The control switch corresponding to the second transformer is used to be turned on when the second turn-on signal is received, and the second transformer is used to boost the voltage output by the power supply when the corresponding control switch is turned on. The control switch corresponding to the boost transformer is used to be turned on when the boost signal is received, and the boost transformer is used to boost the voltage of the power supply and output it to the first transformer when the corresponding control switch is turned on, so that the first transformer increases the amplification factor, and the coupling module is used to couple the voltages output by the first transformer and the second transformer.

[0028] On the other hand, it also includes detection transformers;

[0029] A first end of the secondary coil of the detection transformer is connected to the switch device, and a second end of the secondary coil is grounded;

[0030] When the primary coil of the detection transformer is at a constant voltage, it is determined that the switch device is turned off, and when the primary coil of the detection transformer is at a pulse, it is determined that the switch device is turned on.

[0031] In order to solve the above technical problem, the present invention further provides a driving system for a switching device, comprising the above-mentioned driving device for the switching device and a switching device.

[0032] The present invention discloses a driving device and system for a switching device, and relates to the field of device driving. A frequency division module outputs a clock signal to a driving signal processing module; the driving signal processing module converts a first driving signal received at an input end into an on signal or an off signal based on a clock signal received at a clock end; a control switch corresponding to a transformer is used to turn on when an on signal is received, and to turn off when an off signal is received. The transformer is used to output the voltage output by a power supply after boosting when the corresponding control switch is turned on, so as to drive the switching device to turn on, and not to work when the corresponding control switch is turned off, so as to control the switching device to turn off. By setting a frequency multiplier signal as a clock signal, the frequency of the on signal and the off signal is equal to the frequency of the clock signal, which can improve the transmission efficiency of the signal and reduce the signal hysteresis. The switching device is driven by a transformer to generate a high-voltage driving signal to drive the switching device, and the isolation effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic structural diagram of a driving device for a switch device provided by the present invention;

[0035] Figure 2 A schematic structural diagram of another driving device of a switch device provided by the present invention;

[0036] Figure 3 A waveform diagram provided by the present invention;

[0037] Figure 4 A schematic diagram of the structure of the transformer provided by the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the detection transformer provided by the present invention. DETAILED DESCRIPTION

[0039] The core of the present invention is to provide a driving device and system for a switching device, which can improve the transmission efficiency of the signal and reduce the signal hysteresis by setting the frequency-multiplied signal as the clock signal. The switching device is driven by a transformer to generate a high-voltage driving signal to drive the switching device, and the isolation function can be achieved.

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Figure 1 A schematic diagram of the structure of a driving device of a switching device provided by the present invention, Figure 2 A schematic diagram of the structure of another driving device of a switch device provided by the present invention, wherein the driving device of the switch device comprises:

[0042] The frequency dividing module 1 has an output terminal connected to the clock terminal of the driving signal processing module 2, and is used to output a clock signal to the driving signal processing module 2. The frequency of the clock signal is twice the conduction frequency of the switching device Q. N times, N is a positive integer;

[0043] A driving signal processing module 2, wherein the input end of the driving signal processing module 2 is connected to the first driving signal, the output end of the driving signal processing module 2 is connected to the control end of the transformer 3, and the driving signal processing module 2 is used to convert the first driving signal received at the input end into an on signal or an off signal based on the clock signal received at the clock end, and the frequency of the on signal and the off signal is equal to the frequency of the clock signal;

[0044] The first end of the primary coil of the transformer 3 is connected to the power supply, the second end of the primary coil is connected to the first end of the corresponding control switch, the control end of the control switch corresponding to the transformer 3 is connected to the output end of the drive signal processing module, the second end of the control switch corresponding to the transformer 3 is grounded, the first end of the secondary coil of the transformer 3 is connected to the control end of the switching device Q, the first end of the switching device Q is connected to the power supply, the second end of the switch coil and the second end of the secondary coil are both grounded, the control switch corresponding to the transformer 3 is used to turn on when receiving an on signal and turn off when receiving an off signal, the transformer 3 is used to output the voltage output by the power supply after boosting when the corresponding control switch is turned on, so as to drive the switching device Q to turn on, and does not work when the corresponding control switch is turned off, so as to control the switching device Q to turn off.

[0045] Considering that isolated driver devices often use isolated optocouplers or driver chips based on optocouplers, it is necessary not only to pay attention to the insulation withstand voltage of the driver chip, but also to configure an isolated power supply. In addition, another important parameter of the optocoupler - the cutoff bandwidth is also an important factor limiting isolation applications. When the optocoupler transmits the first drive signal, the rising and falling edges will be affected by the switching speed of the transistor integrated in the optocoupler, which will cause the hysteresis of the first drive signal.

[0046] The present application starts with solving the signal hysteresis and isolation. First, in solving the problem of signal hysteresis, the present application sets a frequency division module 1, which outputs a high-frequency clock signal, such as 2 times, 4 times and higher times. It can be understood that using the frequency-multiplied signal as the clock signal can improve the timeliness of the signal. It can be understood that the higher the frequency of the clock signal, the lower the hysteresis of the final output signal.

[0047] The present application does not directly use a driving signal to drive the switching device Q, but a transformer 3 is provided. The transformer 3 has a primary coil and a secondary coil, which can realize the isolation function without the need for an additional isolation power supply. In addition, the driving voltage of the switching device Q is increased, so the voltage is increased by the transformer 3 before driving the switching device Q.

[0048] Specifically, the present application is provided with a drive signal processing module 2, and the first drive signal received is a wide and narrow pulse signal. The first control signal is determined according to the duty cycle of the wide and narrow pulse signal to control the switch device Q to turn on or off. Therefore, the drive signal processing module 2 of the present application can parse and convert the first drive signal, directly convert it into an on signal and an off signal, and then drive the transformer 3 and the switch device Q, which is more convenient and intuitive. When the drive signal processing module 2 parses the first drive signal, in order to reduce the hysteresis of the signal, the clock signal adopts the clock signal output by the frequency division module 1, and the clock signal output by the frequency division module 1 is a multiplied frequency signal, which can reduce the hysteresis of the signal. When the on signal is sent to the transformer 3, the transformer 3 outputs the voltage output by the power supply after boosting to drive the switch device Q to turn on; when the off signal is sent to the transformer 3, the transformer 3 does not work, and the switch device Q is turned off.

[0049] The present application provides a driving device for a switching device, which relates to the field of device driving. A frequency dividing module 1 outputs a clock signal to a driving signal processing module 2. The frequency of the clock signal is 2 times the frequency of the switching device Q. Ntimes, N is a positive integer; the driving signal processing module 2 is used to convert the first driving signal received at the input end into an on signal and an off signal or an off signal based on the clock signal received at the clock end; the control switch corresponding to the transformer 3 is used to turn on when the on signal is received, and to turn off when the off signal is received. The transformer 3 is used to output the voltage output by the power supply after boosting when the corresponding control switch is turned on, so as to drive the switching device Q to turn on, and not to work when the corresponding control switch is turned off, so as to control the switching device Q to turn off. By setting the multiplied frequency signal as the clock signal, the frequency of the on signal and the off signal is equal to the frequency of the clock signal, which can improve the transmission efficiency of the signal and reduce the signal hysteresis. The switching device Q is driven by the transformer 3 to generate a high-voltage driving signal to drive the switching device Q, and the isolation effect can be achieved.

[0050] Based on the above embodiments:

[0051] In some embodiments, an undervoltage monitoring module 4 is also included;

[0052] The acquisition end of the undervoltage monitoring module 4 is connected to the power supply, and the output end of the undervoltage monitoring module 4 is connected to the input end of the driving signal processing module 2;

[0053] The undervoltage monitoring module 4 is used for blocking the first driving signal from being input to the driving signal processing module 2 when the voltage of the power supply is lower than a preset voltage.

[0054] After the power supply is connected, the present application will pre-step down the power supply, specifically, convert the 24V voltage into 15V voltage. Generally, the preset voltage is set to 10V.

[0055] The method for implementing undervoltage monitoring in the present application may include setting a conversion module, model REF102, inputting 15V voltage and outputting 10V voltage, setting a comparator, inputting power supply to the positive input terminal of the comparator, connecting the negative input terminal of the comparator to the output terminal of the conversion module, connecting the output terminal of the comparator to the control terminal of the control switch, connecting the first terminal of the control switch to the input terminal of the power supply and the drive signal processing module 2, and connecting the second terminal of the control switch to the ground. If the voltage output by the power supply is lower than 10V, the control switch is turned on, and the first drive signal cannot be transmitted to the drive signal processing module 2. If the voltage output by the power supply is higher than 10V, the control switch is turned off, and the first drive signal is transmitted to the drive signal processing module 2.

[0056] In summary, the present application sets an undervoltage lockout to prevent the switching device Q from being unable to be driven even if the transformer 3 is controlled to increase the voltage when the voltage is low.

[0057] Figure 3 A waveform diagram provided by the present invention;

[0058] In some embodiments, it further includes a first XOR module EOR1 and a first inverter F1;

[0059] The input end of the frequency division module 1 is connected to a crystal oscillator, the local oscillator of the crystal oscillator is equal to the oscillation frequency of the switch device Q, the first driving signal is connected to the first input end of the XOR module, the first frequency multiplication signal output by the first output end of the frequency division module 1 is connected to the second input end of the XOR module, the output end of the first XOR module EOR1 is connected to the input end of the first inverter F1, the output end of the first inverter F1 is connected to the reset end of the frequency division module 1, and the frequency of the first frequency multiplication signal is equal to the oscillation frequency of the switch device Q;

[0060] The first XOR module EOR1 and the first inverter F1 are used to reset the frequency division module 1 according to the first driving signal and the first frequency multiplication signal. The reset time is the same as the time when the first driving signal is received.

[0061] Considering that the first driving signal is not regular, that is, the on-time and off-time are not fixed, there will be a time difference between the clock signal output by the frequency dividing module 1 and the first driving signal. In order to achieve the clock signal output by the frequency dividing module 1 to be consistent with the clock of the first driving signal, the frequency dividing module 1 is reset based on the clock signal.

[0062] Specifically, when the frequency division signal is received, T100k (equivalent to the first drive signal EIN) is XORed with the first frequency multiplier signal output by the frequency division module 1, and then the inversion calculation is performed to obtain T_TRIG as the clock signal of the frequency division module 1. In this way, when the first drive signal is input, the frequency division module 1 is reset to reduce the time difference.

[0063] It should also be noted that the model of the frequency division module 1 is MC1406B. The frequency division module 1 divides the 64M signal, and the first frequency-multiplied signal output through the Q7 pin is 50k, which is a one-time frequency signal.

[0064] In some embodiments, the driving signal processing module 2 includes a first trigger D1, a second inverter F2 and a driving signal conversion module 21;

[0065] The second output terminal of the frequency dividing module 1 is connected to the input terminal of the first trigger D1, the third output terminal of the frequency dividing module 1 is connected to the clock terminal of the first trigger D1, the first output terminal of the first trigger D1 is connected to the clock terminal of the driving signal conversion module 21, the input terminal of the second inverter F2 is connected to the first driving signal, the output terminal of the second inverter F2 is connected to the input terminal of the driving signal conversion module 21, and the inverting output terminal of the driving signal is connected to the control circuit;

[0066] The first trigger D1 is used to use the third frequency-multiplied signal output from the third output terminal of the frequency dividing module 1 as a clock signal, and delay the second frequency-multiplied signal output from the second output terminal of the frequency dividing module 1 to obtain a first clock signal. The frequency of the third frequency-multiplied signal is higher than the frequency of the second frequency-multiplied signal. The drive signal conversion module 21 is used to analyze the first drive signal based on the first clock signal to obtain a second drive signal, and feed it back to the control circuit.

[0067] The received first drive signal is a wide and narrow pulse signal. For example, when the duty cycle of the wide and narrow pulse signal is greater than 50%, it is determined that the first drive signal needs to drive the switch device Q to turn on. When the duty cycle of the wide and narrow pulse signal is less than 25%, it is determined that the first drive signal needs to control the switch device Q to turn off. Since the wide and narrow pulse signal is a high level whether it drives the switch device Q to turn on or controls the switch device Q to turn off, it is not convenient for subsequent digital circuit analysis, so it is converted.

[0068] Specifically, the second output end of the frequency division module 1 is the Q6 pin, which outputs a 100k double frequency signal, and the third output end of the frequency division module 1 is the Q5 pin, which outputs a 200k quadruple frequency signal. When the third frequency-multiplied signal, i.e., the 200k quadruple frequency signal, is used as the clock signal, the second frequency-multiplied signal, i.e., the 100k double frequency signal, is delayed by 90 degrees and outputted through the inverting output end as T_EIN, then the signal outputted from the positive output end is T_EIN. ~ .

[0069] T_EIN serves as a drive signal conversion module 21, converting the first drive signal EIN into a second drive signal EIN_DSA. Specifically, a signal with a duty cycle higher than 50% in the first drive signal is converted into a second drive signal with a duty cycle of 100%, and a signal with a duty cycle lower than 25% in the first drive signal is converted into a second drive signal with a duty cycle of 0%. The second drive signal is output to the control circuit DK so that the control circuit determines the switch state. The model of the first trigger D1 is MC14013B.

[0070] In some embodiments, the driving signal processing module 2 further includes a second XOR module EOR2 and a second trigger D2;

[0071] The first input terminal of the second XOR module EOR2 is connected to the positive phase output terminal of the driving signal processing module 2, the second input terminal of the second XOR module EOR2 is connected to the second output terminal of the first trigger D1, the input terminal of the second trigger D2 is connected to the output terminal of the first XOR module EOR1, the clock terminal of the second trigger D2 is connected to the fourth output terminal of the frequency division module 1, and the first output terminal and the second output terminal of the second trigger D2 are respectively connected to the control terminal of the control switch corresponding to the transformer 3;

[0072] The second XOR module EOR2 is used to use the fourth frequency multiplication signal output by the fourth output terminal of the frequency division module 1 as the clock signal, perform XOR calculation on the inverted signal of the first clock signal output by the drive signal processing module 2 and the inverted signal of the second drive signal output by the drive signal processing module 2, and output an open signal. The first output terminal of the second trigger D2 is used to output a first open signal for performing a first delay on the open signal, and the second output terminal of the second trigger D2 is used to output a second open signal for performing a second delay on the open signal. The sum of the angles of the first delay and the second delay is 180 degrees.

[0073] The control switch corresponding to the transformer 3 is specifically configured to be turned on when receiving the first on signal or the second on signal, and to be turned off when receiving the off signal.

[0074] Considering that a single control signal is output to drive the transformer 3, it is impossible to control the transformer 3 to be continuously turned on, so the final output voltage will not meet the demand. The present application sets two transformers 3, the first turn-on signal T_EIN1 is used to control the first transformer 3, and the second turn-on signal T_EIN2 is used to control the second transformer 3. The sum of the delay angles of the first turn-on signal and the second turn-on signal is 180 degrees, so the first transformer 3 and the second transformer 3 can be continuously turned on. Specifically, T_EIN1 is a signal that delays EIN by 135 degrees, and T_EIN2 is a signal that delays EIN_DSA by 45 degrees. When the first drive signal needs to drive the switching device Q to turn on, the signal output to the second trigger D2 is T_EIN, and when the first drive signal needs to drive the switching device Q to turn off, the signal output to the second trigger D2 is 0. The model of the second trigger D2 is MC14015B.

[0075] In some embodiments, the driving signal processing module 2 further includes a third XOR module EOR3 and a third trigger D3;

[0076] A first input terminal of the third XOR module EOR3 is connected to the inverting output terminal of the driving signal processing module 2, a second input terminal of the third XOR module EOR3 is connected to the second output terminal of the first trigger D1, an input terminal of the third trigger D3 is connected to the output terminal of the third XOR module EOR3, a clock terminal of the third trigger D3 is connected to the fourth output terminal of the frequency dividing module 1, and a first output terminal of the third trigger D3 is connected to the control terminal of the control switch corresponding to the transformer 3;

[0077] The third XOR module EOR3 is used to perform XOR calculation on the first clock signal output by the drive signal processing module 2 and the inverted signal of the second drive signal output by the drive signal processing module 2, and output an adjustment signal. The first output end of the third trigger D3 is used to output an off signal for performing a third delay on the adjustment signal, so as to control the control switch corresponding to the transformer 3 to be turned off.

[0078] When the switch device Q needs to be turned off, the third trigger D3 will output an off signal T_AUS which is a 90-degree delay of EIN_DSA to drive the transformer 3 to turn off, thereby controlling the switch device Q to turn off.

[0079] In some embodiments, the second output end of the third trigger D3 is connected to the control end of the control switch corresponding to the transformer 3, and the second output end of the third trigger D3 is used to output a boost signal for performing a fourth delay on the adjustment signal, so as to control the transformer 3 to boost the voltage output by the power supply at a second ratio and output it to the switching device Q.

[0080] The present application also provides a boost function. The fourth trigger will output a boost signal T_BESCHL after delaying EIN_DSA by 45 degrees, which can boost the 24V voltage to 42V to drive the switching device Q to turn on faster.

[0081] Figure 4 A schematic diagram of the structure of the transformer provided by the present invention;

[0082] In some embodiments, the transformer 3 includes a first transformer U1, a second transformer U2, a switching transformer U3, a coupling module U4 and a boost transformer U5;

[0083] A first end of the primary coil of the first transformer U1 is connected to a power supply, a second end of the primary coil of the first transformer U1 is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the first transformer U1 is connected to a first start signal, a first end of the secondary coil of the first transformer U1 is connected to a first input end of the coupling module U4, a first end of the primary coil of the second transformer U2 is connected to a power supply, a second end of the primary coil of the second transformer U2 is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the second transformer U2 is connected to a second start signal, a first end of the secondary coil of the second transformer U2 is connected to a second input end of the coupling module U4, and a step-up transformer The first end of the primary coil of U5 is connected to the power supply, the second end of the primary coil of the second transformer U2 is connected to the first end of the corresponding control switch, the control end of the control switch corresponding to the step-up transformer U5 is connected to the step-up signal, the first end of the secondary coil of the step-up transformer U5 is connected to the middle tap of the primary side of the second transformer U2, the first end of the primary coil of the off transformer U3 is connected to the power supply, the second end of the primary coil of the off transformer U3 is connected to the first end of the corresponding control switch, the control end of the control switch corresponding to the off transformer U3 is connected to the off signal, the first end of the secondary coil of the off transformer U3 is connected to the output end of the coupling module U4 and the common end of the connection is connected to the control end of the switch device Q;

[0084] The control switch corresponding to the first transformer U1 is used to be turned on when a first turn-on signal is received, and the first transformer U1 is used to boost the voltage output by the power supply when the corresponding control switch is turned on. The control switch corresponding to the second transformer U1 is used to be turned on when a second turn-on signal is received, and the second transformer U2 is used to boost the voltage output by the power supply when the corresponding control switch is turned on. The control switch corresponding to the boost transformer U5 is used to be turned on when a boost signal is received, and the boost transformer U5 is used to boost the voltage of the power supply and output it to the first transformer U1 when the corresponding control switch is turned on, so that the first transformer U1 increases the amplification factor. The coupling module U4 is used to couple the voltages output by the first transformer U1 and the second transformer U2.

[0085] The output ends of the first transformer U1 and the second transformer U2 after being turned on are connected through a coupling module U4. The coupling module U4 outputs the boosted voltage of the first transformer U1 and the second transformer U2, and then couples it with the signal output by the boost transformer U3. The output end of the secondary coil of the boost transformer U5 is connected to the middle tap of the primary coil of the first transformer U1 to achieve voltage boosting, so as to drive the switching device Q to turn on faster.

[0086] Figure 5 A schematic diagram of the structure of the detection transformer provided by the present invention;

[0087] In some embodiments, a detection transformer U6 is also included;

[0088] A first end of the secondary coil of the detection transformer U6 is connected to the switch device Q, and a second end of the secondary coil is grounded;

[0089] When the primary coil of the detection transformer U6 is at a constant voltage, it is determined that the switch device Q is turned off. When the primary coil of the detection transformer U6 is at a pulse voltage, it is determined that the switch device Q is turned on.

[0090] If the switching device Q is turned on, the impedance of the secondary side is 0 and the impedance of the primary side is also 0. If the switching device Q is turned on, the impedance of the secondary side is infinite and the impedance of the primary side is also infinite. Therefore, by detecting the impedance of the primary coil, the impedance of the secondary coil can be determined, and then the conduction status of the switching device Q can be determined.

[0091] Specifically, the detected signal is the SZE signal in the figure. If the SZE signal is at a low level, it is determined that the switch device Q is turned off. If the SZE signal is a pulse, it is determined that the switch device Q is turned on.

[0092] The present invention also provides a driving system for a switching device, including the driving device for the switching device Q mentioned above, and also including a switching device Q.

[0093] For an introduction to the driving system of the switching device provided in the present application, please refer to the above-mentioned embodiments, which will not be described in detail here.

[0094] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0095] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0096] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A driving device for a switching device, characterized in that: include: The frequency division module has an output terminal connected to the clock terminal of the driving signal processing module, and is used to output a clock signal to the driving signal processing module, wherein the frequency of the clock signal is twice the conduction frequency of the switching device. N times, N is a positive integer; The driving signal processing module, wherein the input end of the driving signal processing module is connected to the first driving signal, and the driving signal processing module is used to convert the first driving signal received at the input end into an on signal or an off signal based on the clock signal received at the clock end, and the frequency of the on signal and the off signal is equal to the frequency of the clock signal; The first end of the primary coil of the transformer is connected to the power supply, the second end of the primary coil is connected to the first end of the corresponding control switch, the control end of the control switch corresponding to the transformer is connected to the output end of the drive signal processing module, the second end of the control switch corresponding to the transformer is grounded, the first end of the secondary coil of the transformer is connected to the control end of the switching device, the first end of the switching device is connected to the power supply, the second end of the switch coil and the second end of the secondary coil are both grounded, the control switch corresponding to the transformer is used to turn on when receiving the on signal, and turn off when receiving the off signal, the transformer is used to output the voltage output by the power supply after boosting when the corresponding control switch is turned on, so as to drive the switching device to turn on, and not work when the corresponding control switch is turned off, so as to control the switching device to turn off.

2. The driving device of the switching device according to claim 1, characterized in that: It also includes an undervoltage monitoring module; The collection end of the undervoltage monitoring module is connected to the power supply, and the output end of the undervoltage monitoring module is connected to the input end of the drive signal processing module; The undervoltage monitoring module is used to block the first driving signal from being input to the driving signal processing module when the voltage of the power supply is lower than a preset voltage.

3. The driving device of the switching device according to claim 1, characterized in that: Also includes a first XOR module and a first inverter; The input end of the frequency division module is connected to a crystal oscillator, the local oscillator of the crystal oscillator is equal to the oscillation frequency of the switch device, the first driving signal is connected to the first input end of the XOR module, the first frequency-multiplied signal output by the first output end of the frequency division module is connected to the second input end of the XOR module, the output end of the first XOR module is connected to the input end of the first inverter, the output end of the first inverter is connected to the reset end of the frequency division module, and the frequency of the first frequency-multiplied signal is equal to the oscillation frequency of the switch device; The first XOR module and the first inverter are used to reset the frequency division module according to the first driving signal and the first frequency multiplication signal, and the reset time is the same as the time when the first driving signal is received.

4. The driving device of the switching device according to claim 1, characterized in that: The driving signal processing module includes a first trigger, a second inverter and a driving signal conversion module; The second output terminal of the frequency division module is connected to the input terminal of the first trigger, the third output terminal of the frequency division module is connected to the clock terminal of the first trigger, the first output terminal of the first trigger is connected to the clock terminal of the drive signal conversion module, the input terminal of the second inverter is connected to the first drive signal, the output terminal of the second inverter is connected to the input terminal of the drive signal conversion module, and the inverted output terminal of the drive signal is connected to the control circuit; The first trigger is used to use the third frequency-multiplied signal output by the third output terminal of the frequency division module as a clock signal, and delay the second frequency-multiplied signal output by the second output terminal of the frequency division module to obtain a first clock signal. The frequency of the third frequency-multiplied signal is higher than the frequency of the second frequency-multiplied signal. The drive signal conversion module is used to analyze the first drive signal based on the first clock signal to obtain a second drive signal, and feed it back to the control circuit.

5. The driving device of the switching device according to claim 4, characterized in that: The driving signal processing module also includes a second XOR module and a second trigger; A first input terminal of a second XOR module is connected to a positive phase output terminal of the driving signal processing module, a second input terminal of the second XOR module is connected to a second output terminal of the first trigger, an input terminal of the second trigger is connected to an output terminal of the first XOR module, a clock terminal of the second trigger is connected to a fourth output terminal of the frequency dividing module, and a first output terminal and a second output terminal of the second trigger are respectively connected to a control terminal of a control switch corresponding to the transformer; The second XOR module is used to use the fourth frequency-multiplied signal output by the fourth output terminal of the frequency division module as a clock signal, perform XOR calculation on the inverted signal of the first clock signal output by the drive signal processing module and the inverted signal of the second drive signal output by the drive signal processing module, and output an open signal, the first output terminal of the second trigger is used to output a first open signal that performs a first delay on the open signal, and the second output terminal of the second trigger is used to output a second open signal that performs a second delay on the open signal, and the sum of the angles of the first delay and the second delay is 180 degrees; The control switch corresponding to the transformer is specifically configured to be turned on when receiving the first on signal or the second on signal, and to be turned off when receiving the off signal.

6. The driving device of the switching device according to claim 5, characterized in that: The driving signal processing module also includes a third XOR module and a third trigger; A first input terminal of a third XOR module is connected to an inverting output terminal of the driving signal processing module, a second input terminal of the third XOR module is connected to a second output terminal of the first trigger, an input terminal of the third trigger is connected to an output terminal of the third XOR module, a clock terminal of the third trigger is connected to a fourth output terminal of the frequency dividing module, and a first output terminal of the third trigger is connected to a control terminal of a control switch corresponding to the transformer; The third XOR module is used to perform XOR calculation on the first clock signal output by the drive signal processing module and the inverted signal of the second drive signal output by the drive signal processing module, and output an adjustment signal. The first output end of the third trigger is used to output an off signal for performing a third delay on the adjustment signal, so as to control the control switch corresponding to the transformer to turn off.

7. The driving device of the switching device according to claim 6, characterized in that: The second output end of the third trigger is connected to the control end of the control switch corresponding to the transformer, and the second output end of the third trigger is used to output a boost signal for performing a fourth delay on the adjustment signal, so as to control the transformer to boost the voltage output by the power supply at a second ratio and output it to the switching device.

8. The driving device of the switching device according to claim 7, characterized in that: The transformer includes a first transformer, a second transformer, a switching transformer, a coupling module and a step-up transformer; A first end of the primary coil of the first transformer is connected to a power supply, a second end of the primary coil of the first transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the first transformer is connected to a first on signal, a first end of the secondary coil of the first transformer is connected to a first input end of a coupling module, a first end of the primary coil of the second transformer is connected to a power supply, a second end of the primary coil of the second transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the second transformer is connected to a second on signal, a first end of the secondary coil of the second transformer is connected to a second input end of the coupling module, a first end of the primary coil of the boost transformer is connected to a power supply, a second end of the primary coil of the second transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the boost transformer is connected to the boost signal, a first end of the secondary coil of the boost transformer is connected to a primary intermediate tap of the second transformer, a first end of the primary coil of the off transformer is connected to a power supply, a second end of the primary coil of the off transformer is connected to a first end of a corresponding control switch, a control end of the control switch corresponding to the off transformer is connected to the off signal, a first end of the secondary coil of the off transformer is connected to an output end of the coupling module and a common end connected thereto is connected to a control end of the switch device; The control switch corresponding to the first transformer is used to be turned on when the first turn-on signal is received, and the first transformer is used to boost the voltage output by the power supply when the corresponding control switch is turned on. The control switch corresponding to the second transformer is used to be turned on when the second turn-on signal is received, and the second transformer is used to boost the voltage output by the power supply when the corresponding control switch is turned on. The control switch corresponding to the boost transformer is used to be turned on when the boost signal is received, and the boost transformer is used to boost the voltage of the power supply and output it to the first transformer when the corresponding control switch is turned on, so that the first transformer increases the amplification factor, and the coupling module is used to couple the voltages output by the first transformer and the second transformer.

9. The driving device of a switching device according to any one of claims 1 to 8, characterized in that: Also included is a detection transformer; A first end of the secondary coil of the detection transformer is connected to the switch device, and a second end of the secondary coil is grounded; When the primary coil of the detection transformer is at a constant voltage, it is determined that the switch device is turned off, and when the primary coil of the detection transformer is at a pulse, it is determined that the switch device is turned on.

10. A driving system for a switching device, characterized in that: A driving device comprising a switching device as claimed in any one of claims 1 to 9, further comprising a switching device.

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