A two-level driving device based on real-time simulation controller

Abstract

The present invention provides a two-level driving device based on a real-time simulation controller, comprising: a processing board, a conditioning circuit is provided on the processing board, and the conditioning circuit is used to condition the input pulse width modulation signal; and a driving board, the driving board is connected to the processing board, and a driving module and a power module are provided on the driving board, the driving module is used to boost the pulse width modulation signal after the conditioning process, and the power module is used to invert the pulse width modulation signal after the boost process and generate a variable current signal and / or a variable voltage signal; wherein the maximum driving current of the driving module is 2.5A; and the maximum switching frequency of the power module is 20 KHZ. The two-level driving device based on the real-time simulation controller of the present invention has a simple structure, a high switching frequency and a high driving current, and based on the real-time simulation controller, the user can perform secondary development, which can solve the problem that the existing driver does not meet the technical requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply and power electronics, and in particular relates to a two-level driving device based on a real-time simulation controller. Background Art

[0002] At present, mainstream drivers all use digital signal processors DSP (Digital Signal Processing) / ARM (Advanced RISC Machine) / FPGA (Field Programmable Gate Array) as the control core, which can realize relatively complex control algorithms, and realize digitalization, networking and intelligence. Power devices generally use drive circuits designed with intelligent power modules IPM (Intelligent Power Module) as the core. The IPM integrates the drive circuit inside, and also has fault detection and protection circuits such as overvoltage, overcurrent, overheating, and undervoltage. A soft start circuit is also added to the main circuit to reduce the impact of the start-up process on the driver. The power drive unit first rectifies the input three-phase power or mains power through a three-phase full-bridge rectifier circuit to obtain the corresponding direct current; after the rectified three-phase power or mains power, the three-phase sinusoidal PWM (Pulse Width Modulation) voltage inverter is used to drive the three-phase permanent magnet synchronous AC servo motor. The entire process of the power drive unit can be simply described as the process of AC-DC-AC rectification and inversion, and then a single motor is controlled.

[0003] The following technical requirements are usually required for the driver: 1. Input power requirement: 3-phase AC 0~380V;

[0004] 2. Inversion requirements: support AC-DC-AC rectification and inversion function, DC-AC inversion function; 3. Sampling requirements: bus voltage sampling, output current sampling, temperature sampling; 4. Protection requirements: output current overcurrent, bus overvoltage, overtemperature, and overload protection.

[0005] However, there are many technical problems with existing drivers: 1. Single input power supply requirement; 2. Very few sampling paths; 3. Single topology structure, not universal, unable to meet the requirements of general customers; 4. DSP / ARM / FPGA programs are fixed and users cannot perform secondary development. Therefore, it is urgent to develop a new driver that meets the existing technical requirements. Summary of the invention

[0006] The embodiment of the present invention provides a two-level driving device based on a real-time simulation controller to solve the problem that the existing driver does not meet the technical requirements.

[0007] In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a two-level driving device based on a real-time simulation controller, comprising:

[0008] A processing board, wherein a conditioning circuit is provided on the processing board, and the conditioning circuit is used to condition the input pulse width modulation signal;

[0009] and a driving board, the driving board being connected to the processing board, the driving board being provided with a driving module and a power module, the driving module being used for performing a voltage boost processing on the pulse width modulation signal after the conditioning processing, and the power module being used for performing an inversion processing on the pulse width modulation signal after the voltage boost processing and generating a variable current signal and / or a variable voltage signal;

[0010] Wherein, the maximum driving current of the driving module is 2.5A;

[0011] The maximum switching frequency of the power module is 20 KHZ.

[0012] According to an embodiment of the present invention, the driving module includes a driving chip, and the model of the driving chip is ACPL-332J.

[0013] According to another embodiment of the present invention, the driving module further comprises a push-pull circuit connected to the driving chip, and the push-pull circuit is used to perform push-pull boost processing on the pulse width modulation signal received by the driving chip.

[0014] According to another embodiment of the present invention, the driving module includes two push-pull circuits.

[0015] According to another embodiment of the present invention, the DC side main circuit structure of the driving board is an AC-DC-AC structure or a DC-AC structure, and the topological structure adopted by the inverter side of the driving board is any one of a single-phase half bridge, a single-phase full bridge, a two-level three-phase half bridge, a two-level three-phase full bridge, a five-level three-phase half bridge, a five-level three-phase full bridge, a three-phase three-bridge arm, and a three-phase four-bridge arm.

[0016] According to another embodiment of the present invention, the power module is an Infineon PIM module.

[0017] According to another embodiment of the present invention, a sampling module is further provided on the driving board, and the sampling module includes 4-channel voltage sampling and 5-channel current sampling.

[0018] According to another embodiment of the present invention, the two-level driving device based on the real-time simulation controller further includes an electromagnetic compatibility board, and the electromagnetic compatibility board is connected to the driving board and the processing board respectively.

[0019] According to another embodiment of the present invention, the two-level driving device based on the real-time simulation controller further includes a switching board, and the processing board is connected to the real-time simulation controller via the switching board.

[0020] On the other hand, an embodiment of the present invention further provides a driving system, comprising the above-mentioned two-level driving device based on real-time simulation controller and a device to be driven connected to the two-level driving device based on real-time simulation controller.

[0021] Beneficial effects of the present invention:

[0022] The pulse width modulation signal input into the two-level driving device based on the real-time simulation controller of the embodiment of the present invention is processed by the conditioning circuit of the processing board and sent to the driving module on the driving board to boost the voltage to a preset voltage value and then sent to the power module for inversion processing. After being processed by the power module, a variable current and voltage signal is generated, which is used to control the device to be driven. In addition, the maximum driving current of the driving module in this embodiment is 2.5A, and the maximum switching frequency of the power module is 20 KHZ. Therefore, the two-level driving device based on the real-time simulation controller of the embodiment of the present invention has a simple structure, a high switching frequency and a high driving current, and based on the real-time simulation controller, the user can perform secondary development, which can solve the problem that the existing driver does not meet the technical requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0024] Figure 1 is a schematic block diagram of an embodiment of a two-level driving device based on a real-time simulation controller of the present invention;

[0025] Figure 2 is a schematic block diagram of an embodiment of a driving board of a two-level driving device based on a real-time simulation controller of the present invention;

[0026] Figure 3 It is a structural diagram of a three-phase half-bridge main circuit of an embodiment of a driving board of a two-level driving device based on a real-time simulation controller of the present invention;

[0027] Figure 4 is a schematic block diagram of another embodiment of a two-level driving device based on a real-time simulation controller of the present invention;

[0028] Figure 5It is a topological structure diagram of an embodiment of an electromagnetic compatibility board of a two-level driving device based on a real-time simulation controller of the present invention;

[0029] Figure 6 It is a topological circuit diagram of an embodiment of a busbar capacitor plate of a two-level driving device based on a real-time simulation controller of the present invention;

[0030] Figure 7 is a schematic block diagram of an embodiment of a drive system of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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.

[0032] See also Figure 1 As shown, an embodiment of the present invention provides a two-level driving device 100 based on a real-time simulation controller, comprising:

[0033] A processing board 1, on which a conditioning circuit 10 is provided, and the conditioning circuit 10 is used to condition an input pulse width modulation signal (PWM);

[0034] And, a driving board 2, the driving board 2 is connected to the processing board 1, and a driving module 20 and a power module 21 are provided on the driving board 2, the driving module 20 is used to boost the pulse width modulation signal after the conditioning process, and the power module 21 is used to invert the pulse width modulation signal after the boost process and generate a variable current signal and / or a variable voltage signal;

[0035] Among them, the maximum driving current of the driving module 20 is 2.5A;

[0036] The maximum switching frequency of the power module 21 is 20 kHz.

[0037] The pulse width modulation signal input into the two-level driving device based on the real-time simulation controller of the embodiment of the present invention is processed by the conditioning circuit of the processing board and sent to the driving module on the driving board to boost the voltage to a preset voltage value and then sent to the power module for inversion processing. After being processed by the power module, a variable current and voltage signal is generated, which is used to control the device to be driven. In addition, the maximum driving current of the driving module in this embodiment is 2.5A, and the maximum switching frequency of the power module is 20 KHZ. Therefore, the two-level driving device based on the real-time simulation controller of the embodiment of the present invention has a simple structure, a high switching frequency and a high driving current, and based on the real-time simulation controller, the user can perform secondary development, which can solve the problem that the existing driver does not meet the technical requirements.

[0038] In some implementations, the driver module 20 of the embodiment of the present invention includes a driver chip 201, and the model of the driver chip 201 is ACPL-332J. In this embodiment, the driver chip, that is, the driver optocoupler, is ACPL-332J, which has the following advantages: supports pulse signals above 1000KHZ; has excellent common mode transient suppression (CMTI) of up to 100kV / μs, which can avoid erroneous gate driver failures in noisy environments; supports rail-to-rail output current up to 5A, so that no output buffer circuit is required; has integrated fail-safe IGBT and MOSFET diagnostic, protection and fault reporting functions; provides minimal propagation delay and excellent timing deviation. The high peak output current and wide operating voltage range of the chip eliminate the need for output buffer circuits, enabling designers to implement cost-effective gate driver solutions for motor drives and power inverters.

[0039] In some implementations, see Figure 2As shown, the driving module 20 of the embodiment of the present invention also includes a push-pull circuit 202 connected to the driving chip 201, and the push-pull circuit 202 is used to push-pull and boost the pulse width modulation signal received by the driving chip 201. In this embodiment, the driving circuit uses a push-pull circuit, and the advantages of this circuit are: in a general push-pull circuit, such as the output stage, the circuit works to amplify the input signal; and to complete the circuit work, but the general push-pull circuit uses the same level components (transistors or electron tubes) to realize the output stage components to be turned on in turn, and two signals of equal magnitude and opposite phases must be stimulated, that is, the so-called phase inversion problem. The phase inversion can be completed by using a circuit, and an inductor component (transformer) can be used, but this all increases the complexity and reliability of the circuit. Complementary circuits can overcome the above problems that occur when using unipolar components. When the circuit is working, the bipolar components are turned on in turn, and the phase inversion or simplified circuit can also be omitted, so that the stability of the circuit can be improved accordingly. For example, when the input signal is positive, the NPN tube in the bipolar is turned on and the PNP is automatically turned off due to the polarity. When the circuit input signal is negative, the PNP tube is turned on and the NPN tube is turned off. No matter how the signal changes, it can automatically turn on and off to complete the circuit operation. The push-pull circuit has a simple structure and a high utilization rate of the switch transformer core. When the push-pull circuit is working, only one of the two symmetrical power switch tubes is turned on at a time, so the conduction loss is small.

[0040] In some implementations, see Figure 2 As shown, the driving board 2 of the embodiment of the present invention also includes a driving power supply 22, and the model of the driving power supply 22 is: QA151M. In this embodiment, the driving power supply uses QA151M, which has the following advantages: high power conversion efficiency, up to 83%; high isolation voltage of 6000VDC, ultra-small isolation capacitance of 3.5pF, and sustainable short-circuit protection; it adopts a two-way independent output and then common connection mode, which can better provide energy for the opening and closing of the power module, and has output short-circuit protection and self-recovery capabilities.

[0041] In some embodiments, the driving module of the present invention includes two push-pull circuits. In this embodiment, the power module driver uses two dual push-pull circuits to expand the current, and with excellent heat dissipation design, it can achieve a driving capability of up to 4A with a small temperature rise.

[0042] In some implementations, the power module 21 of the present invention is an Infineon PIM module. In this embodiment, the power module IGBTs are all made of the world's leading Infineon brand, with a maximum withstand voltage of 1200V, current selected according to the power level, and an IGBT switching frequency of up to 20KHZ.

[0043] The two-level driving device based on the real-time simulation controller of the embodiment of the present invention can be a three-phase four-bridge arm driving board, mainly realizing AC-DC-AC inversion function, temperature sampling, 4-way output current sampling, 3-way output voltage sampling, 1-way bus voltage sampling, 1-way bus current sampling, and 8-way PWM push-pull boost to 15V output; it can realize both three-phase motor control and three-phase four-bridge arm power grid control; it uses the latest driver chip ACPL-332J launched by AVAGO, which has high performance, a driving current of 2.5A, and has the characteristics of power supply undervoltage and short-circuit protection functions, as well as the driving power supply QA151M of Jinshengyang Company, and uses a push-pull circuit at the same time, so that the power module has a higher switching frequency, thereby controlling the output current of the two-level driving device to be more realistic sine wave waveform and better motor control effect.

[0044] In some implementations, the DC side main circuit structure of the driving board 2 of the embodiment of the present invention is an AC-DC-AC structure or a DC-AC structure, and the topology structure adopted by the inverter side of the driving board is any one of a single-phase half-bridge, a single-phase full-bridge, a two-level three-phase half-bridge, a two-level three-phase full-bridge, a five-level three-phase half-bridge, a five-level three-phase full-bridge, a three-phase three-bridge arm, and a three-phase four-bridge arm. The two-level driving device based on the real-time simulation controller of this embodiment can support a variety of topological structures.

[0045] In some implementations, see Figure 2 As shown, the driver board 2 of the embodiment of the present invention is also provided with a sampling module 23, which includes 3-way load voltage sampling, 4-way load current sampling, 3-way network voltage sampling, 4-way network current sampling, multi-way encoder sampling, 3-way digital input sampling and 3-way digital output sampling. The two-level driving device of this embodiment has more and richer sampling signal paths.

[0046] The driving board of the embodiment of the present invention is also provided with a signal level conversion module, a weak current signal isolation module,

[0047] Buffer relay module, rectifier module, bus capacitor filter module, bus voltage equalizing module, brake module, multi-channel power supply module, active Miller clamp module and power module short-circuit protection module, etc.

[0048] In summary, the main functions of the driving board of the embodiment of the present invention include:

[0049] 1. Convert weak current digital signals into analog signals, condition and amplify them and transmit them to the controlled object;

[0050] 2. Invert the industrial frequency AC power supply or DC power supply into AC power supply of various frequencies and provide it to the controlled object, thereby realizing the power conversion function of the power supply, and further realizing the functions of voltage regulation, frequency regulation, current regulation and speed regulation;

[0051] 3. Power devices generally use drive circuits designed with intelligent power modules IPM, PIM, IGBT, and silicon carbide SIC as the core. However, the IPM integrates the drive circuit internally and has fault detection and protection circuits such as overvoltage, overcurrent, overheating, and undervoltage. A soft start circuit or buffer circuit is also designed in the main circuit to reduce the impact of the start-up process on the driver to prevent the instantaneous current from being too large and the bus capacitor from forming a short circuit and causing the machine to explode. The power drive unit first rectifies the input three-phase electricity or city electricity through a three-phase full-bridge uncontrolled rectifier circuit to obtain the corresponding direct current, and then controls the controlled object through a three-phase sinusoidal PWM voltage inverter. The entire process of the power drive unit can be simply described as an AC-DC-AC process; the main topology circuit of the rectifier unit (AC-DC) is a three-phase full-bridge uncontrolled rectifier circuit;

[0052] 4. The main circuit of the DC side of the driver board adopts AC-DC-AC structure and DC-AC structure; the inverter side of the driver board can adopt a three-phase half-bridge, see Figure 3 As shown;

[0053] 5. Support multiple input voltage levels: AC single-phase 220V / three-phase 220V / three-phase 380V input, DC 0~600V input;

[0054] 6. Support power levels: Rated output power (current): 2KW, 15KW, 30KW and 55KW, etc.;

[0055] 7. Support multiple topologies: single-phase full bridge, two-level three-phase half bridge with three arms and four arms, two-level three-phase full bridge and other topologies;

[0056] 8. All power modules IGBT adopt the world's leading brand Infineon PIM module, with a maximum withstand voltage of 1200V, current selected according to power level, and switching frequency up to 20KHZ;

[0057] 9. The bus voltage supports a rated DC voltage of DC600V and a maximum of 720V (overvoltage threshold);

[0058] 10. The overload capacity currently supports a maximum of 3 times overload (overload time 1 second);

[0059] 11. Voltage sampling module (4 channels in total): supports phase voltage and line voltage sampling (optional), 1 bus voltage, 3 driver board output voltages; accuracy 0.5%, response time less than 40us, frequency 200Hz;

[0060] 12. Current sampling module (5 channels in total): 1 channel for bus current, 4 channels for driver board output current; accuracy 0.5%, response time less than 1us, frequency 100KHz;

[0061] 13. Protection function: bus overvoltage, driver output current overcurrent, overtemperature protection, braking function, etc.;

[0062] 14. The driver chip of the power module adopts AVAGO brand, which has high performance, driving current up to 2.5A, power supply undervoltage and short circuit protection functions;

[0063] 15. The DCDC power module adopts the MORNSUN brand, which has the characteristics of small output power ripple, low noise and low heat;

[0064] 16. The Hall voltage / current sensor adopts ZX brand, which can accurately measure DC, AC, pulse and various irregular waveform voltage / current under electrical isolation conditions;

[0065] 17. The protection circuit adopts the protection circuit composed of TI brand's newly launched DQ trigger, which has the characteristics of sensitive response and low power consumption.

[0066] 18. Support various motor control: AC asynchronous / synchronous motor, permanent magnet synchronous motor, AC servo motor, DC brushless / brushless motor, AC / DC linear motor, customized motor, etc.; widely used in new energy vehicles, motor support system, servo industrial control and other fields;

[0067] 19. Support grid-connected control: realize single-phase grid-connected inverter function and three-phase grid-connected inverter function; widely used in wind power, photovoltaic, energy storage system, UPS system, active filtering, harmonic control, reactive power compensation, three-phase imbalance and other fields.

[0068] 20. All circuit boards adopt a 6-layer design, which has the characteristics of strong anti-interference ability, high signal reliability, and strong EMC electromagnetic compatibility function.

[0069] The main functions of the processing board in the embodiment of the present invention are to condition the collected current, voltage, encoder and other signals, handle fault protection and fault reset in a timely manner, and indirectly control digital input and output signals and other functions.

[0070] The processing board consists of multiple modules, specifically:

[0071] 1. Conditioning circuit is sampling signal conditioning module (voltage, current, temperature, etc.):

[0072] The Hall voltage / current sensor adopts ZX brand, which can accurately measure DC, AC, pulse and various irregular waveform voltage / current under electrical isolation conditions;

[0073] Voltage sampling module (10 channels in total): 1 bus voltage, 3 driver output voltages, 3 grid voltages, and 3 load voltages; accuracy 0.5%, response time less than 40us, frequency 200Hz;

[0074] Current sampling module (13 channels in total): 1 channel for bus current, 4 channels for driver output current, 4 channels for network current, and 4 channels for load current; accuracy 0.5%, response time less than 1us, frequency 100KHz;

[0075] 2. Digital input module DI: 3-way high-speed isolated input (bidirectional), maximum frequency 50KHZ;

[0076] 3. Digital output module DO: 3-way high-speed isolated output, maximum frequency 50KHZ, current 3A / AC250V, 1A / DC30V;

[0077] 4. Multi-channel power supply module (3.3V, 5V, +15V, -15V, 24V):

[0078] Accuracy and linear voltage regulation degree 1%; using MORNSUN brand, with the characteristics of small output power ripple, low noise, low heat, etc.;

[0079] 5. Encoder acquisition module and signal conditioning module:

[0080] Supports multiple encoder types: single-ended / differential incremental (5V / 24V), absolute, resolver, Hall, grating encoder, etc.; supports encoder digital / analog signal output, supports high-resolution / precision encoders (such as 2500 lines / 3600 lines / 5000 lines, etc.);

[0081] 6. Protection module (overvoltage, overcurrent, overtemperature, etc.):

[0082] The protection circuit is composed of the sampling LM293 comparator and the newly launched DQ trigger of TI brand. It has the characteristics of sensitive response and low power consumption, and has bus overvoltage, driver output current overcurrent, overtemperature protection, braking function, etc.

[0083] 7. Fault reset module:

[0084] The reset circuit uses a protection circuit composed of TI's newly launched DQ trigger, which has the characteristics of sensitive response and low power consumption.

[0085] 8. Support 4 pairs of complementary PWM signal output.

[0086] 9. All circuit boards adopt a 6-layer design, which has the characteristics of strong anti-interference ability, high signal reliability, and strong EMC electromagnetic compatibility function.

[0087] In some implementations, see Figure 4 As shown, the two-level driving device 100 of the embodiment of the present invention further includes an electromagnetic compatibility board 3, and the electromagnetic compatibility board 3 is connected to the driving board 2 and the processing board 1 respectively.

[0088] The main functions of the electromagnetic compatibility board EMC in this embodiment are:

[0089] 1. Suppress the noise of the power grid and the high-frequency harmonics generated by the driver and the noise and high-frequency harmonics generated by the switching power supply, mainly to reduce and suppress the electromagnetic interference generated by the driver and meet the European standard EN61000;

[0090] 2. The EMC electromagnetic compatibility board topology can be used as a single L filter and a first-stage LC and two-stage LC filter, see Figure 5 As shown;

[0091] 3. EMC electromagnetic compatibility board technical parameters:

[0092] 1) Rated input voltage: three-phase AC 0~380V;

[0093] 2) Rated output voltage: three-phase AC 0~380V;

[0094] 3) Rated output power (current): 15KW (25A);

[0095] 4) Device configuration: X safety capacitor, Y safety capacitor, varistor, discharge tube, common mode inductor;

[0096] 5) Inductor L parameter: 20mH;

[0097] 6) Working frequency: 50 / 60Hz;

[0098] 7) Temperature range: -25℃~+85℃;

[0099] 8) Temperature rise: < 30℃;

[0100] 9) Withstand voltage test: 1 minute;

[0101] 10) Surge voltage between lines: 2KV;

[0102] 11) Surge voltage between line and ground: 2KV;

[0103] 12) Group pulse EFT voltage between lines: 4KV;

[0104] 13) Group pulse EFT voltage between lines: 4KV;

[0105] 14) All circuit boards adopt a 6-layer design, which has the characteristics of strong anti-interference ability, high signal reliability, and strong EMC electromagnetic compatibility.

[0106] In some implementations, see Figure 4As shown, the two-level driving device 100 based on the real-time simulation controller according to the embodiment of the present invention further includes a switching board 4 , and the processing board 1 is connected to the real-time simulation controller via the switching board 4 .

[0107] In some implementations, see Figure 4 As shown, the two-level driving device 100 based on the real-time simulation controller according to the embodiment of the present invention further includes a bus capacitor plate 5 , which is connected to the processing board 1 and the driving board 2 respectively.

[0108] The main functions of the busbar capacitor plate in this embodiment are:

[0109] 1. In the open source drive, AC power or DC power as the input power needs to be connected to the inverter side of the drive through the DC bus. Since the inverter bridge obtains the effective value or high peak pulse current from the bus capacitor, it will generate high pulse voltage spikes on the bus branch, which makes it difficult for the inverter bridge to withstand the high peak voltage spike. Therefore, it is necessary to select the bus capacitor board for smoothing and filtering before outputting it to the inverter bridge;

[0110] 2. When the power tube IGBT switch is turned on, the bus voltage can be smoothed, so that the bus voltage of the driver remains stable;

[0111] 3. Reduce the inductance parameters of the power tube IGBT to the minimum possible and weaken the peak voltage of the bus;

[0112] 4. Absorb high pulse current on the driver bus capacitor;

[0113] 5. Prevent the inverter bridge from overcharging voltage and transient voltage from affecting the driver;

[0114] 6. Add a voltage equalization circuit to prevent the driver from exploding due to voltage imbalance at both ends of the bus capacitor when the driver fails;

[0115] 7. A bus voltage starting charging circuit is designed. Before the bus voltage is stabilized and built up, a current limiting resistor is connected in series in the charging circuit. After the voltage is stabilized, the current limiting resistor is removed to prevent the electrolytic capacitor on the DC bus from being very large at the moment of power-on. According to the capacitor voltage-current formula, the capacitor voltage cannot mutate suddenly, but the capacitor current can mutate suddenly, R=0, the charging time t=0, and the charging current is very large, which is equivalent to a short circuit and burns out the rectifier bridge and power supply.

[0116] 8. Technical parameters of busbar capacitor plate:

[0117] a. Rated input voltage: DC600V, maximum 720V;

[0118] b. Rated input current: 60A;

[0119] c. Capacitor parameters: single capacitor 450V, 1500UF; sampling series and parallel mode for expansion, supporting up to four groups;

[0120] d. Configure safety capacitors: Y capacitors (capacitance 4700pF); film capacitors;

[0121] e. Temperature range: -25~85;

[0122] f. Temperature rise: less than 30;

[0123] g. Voltage balancing resistor parameters: 2KV high voltage resistor, resistance value 150K, sampling series-parallel mode to expand resistance value;

[0124] h. All circuit boards adopt a 6-layer design, which has the characteristics of strong anti-interference ability, high signal reliability, and strong EMC electromagnetic compatibility.

[0125] On the other hand, see Figure 7 As shown, an embodiment of the present invention further provides a driving system, including the above-mentioned two-level driving device 100 based on real-time simulation controller and a device to be driven 200 connected to the two-level driving device 100 based on real-time simulation controller.

[0126] See also Figure 7 As shown, the driving system in this embodiment further includes a controller 300, wherein the controller 300 may be a real-time simulation controller.

[0127] The drive system in this embodiment is applied to various motor control occasions and power grid control, for example:

[0128] 1. Steel: rolling mill, roller table, fan, pump, crane, ladle car, converter tilting, etc.;

[0129] 2. Steel rolling wire making: wire drawing machine, winding machine, blower, pump, lifting machinery, fixed-length cutting, automatic feeding, etc.;

[0130] 3. Electricity: boiler blowers, water supply pumps, centrifugal mixers, conveyor belts, pumping power stations, flywheels, etc.;

[0131] 4. Petroleum: oil pumps, electric submersible pumps, water injection pumps, pumping units, etc. 5. Papermaking: papermaking machines, pumps, pulverizers, fans, mixers, blowers, etc.

[0132] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A two-level driving device based on a real-time simulation controller, characterized in that: include: A processing board, wherein a conditioning circuit is provided on the processing board, and the conditioning circuit is used to condition the input pulse width modulation signal; and a driving board, the driving board being connected to the processing board, the driving board being provided with a driving module and a power module, the driving module being used for performing a voltage boost processing on the pulse width modulation signal after the conditioning processing, and the power module being used for performing an inversion processing on the pulse width modulation signal after the voltage boost processing and generating a variable current signal and / or a variable voltage signal; Wherein, the maximum driving current of the driving module is 2.5A; The maximum switching frequency of the power module is 20 KHZ; The driving module includes a driving chip, and the model of the driving chip is ACPL-332J; The driving module further comprises a push-pull circuit connected to the driving chip, the push-pull circuit being used for performing push-pull boost processing on the pulse width modulation signal received by the driving chip; The driving module includes two push-pull circuits; The DC side main circuit structure of the driving board is an AC-DC-AC structure or a DC-AC structure, and the topological structure adopted by the inverter side of the driving board is any one of a single-phase half bridge, a single-phase full bridge, a two-level three-phase half bridge, a two-level three-phase full bridge, a five-level three-phase half bridge, a five-level three-phase full bridge, a three-phase three-bridge arm, and a three-phase four-bridge arm; The power module is an Infineon PIM module; The driving board is also provided with a sampling module, which includes 4-way voltage sampling and 5-way current sampling; The two-level driving device based on the real-time simulation controller further comprises an electromagnetic compatibility board, and the electromagnetic compatibility board is connected to the driving board and the processing board respectively; The two-level driving device based on the real-time simulation controller also includes a switching board, and the processing board is connected to the real-time simulation controller through the switching board.

2. A drive system, characterized in that: It comprises the two-level driving device based on real-time simulation controller as claimed in claim 1 and a device to be driven connected to the two-level driving device based on real-time simulation controller.

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