CN116247959A - Driving circuit capable of generating positive and negative alternate pulse voltage - Google Patents
Driving circuit capable of generating positive and negative alternate pulse voltage Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The embodiment of the invention discloses a driving circuit capable of generating positive and negative alternate pulse voltage, which comprises: a signal control module; the forward current output module is electrically connected with the load coil and provides forward current for the load coil under the conduction signal of the signal control module; the negative current output module is electrically connected with the load coil and provides negative current for the load coil under the conduction signal of the signal control module; the positive current output module, the negative current output module and the load coil form a bridge circuit structure so that the current output to the load coil can be commutated; the power module is electrically connected with the positive current output module and the negative current output module respectively. The driving circuit capable of generating the positive and negative alternate pulse voltage is used for generating a positive and negative pulse voltage signal with accurate and adjustable pulse width, so that the control precision of the balance actuator is improved, and the balance adjustment time is shortened.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a driving circuit capable of generating positive and negative alternate pulse voltages.
Background
Along with the industrial intelligent manufacturing upgrade, intelligent equipment with the functions of state monitoring, vibration control, health state self-maintenance and the like becomes the future development direction of high-end equipment. The unbalanced vibration of the rotor system is a main cause of the exceeding vibration of the equipment, and even if the accurate dynamic balance is carried out before leaving the factory, the rotor system can generate new unbalance in the running process, gradually destroys the balance state and influences the running safety and reliability of the equipment. Therefore, facing the unbalanced vibration real-time suppression requirement of the rotor system in the above field, it is of great importance to research an online automatic balancing system capable of forming compensation quality in real time during the operation of the equipment. The automatic balancing technology represented by the electromagnetic automatic balancing system can adjust the rotor mass distribution in real time under the state that high-end equipment is not stopped to realize unbalanced vibration suppression, and the driving circuit is an important component of the automatic balancing system.
The electromagnetic balance actuator is used as a core component of an automatic balance system, and a driving circuit is required to provide voltage and positive and negative alternating current with proper pulse width for an inductance coil in the actuator so as to realize accurate movement of the balance weight disc according to a control strategy. When high-end equipment represented by a high-grade machine tool and an aeroengine runs at a high speed, even a small unbalance amount can generate large unbalanced vibration, so that the processing quality of a workpiece is influenced, equipment is damaged even, an automatic balance actuator is required to complete online dynamic balance, vibration suppression is required to be realized quickly, and the balance speed is very important. The balance capacity, the balance speed and the balance precision are main performance indexes for measuring the electromagnetic automatic balance system, wherein the balance capacity and the balance precision are mainly determined by the structural design of a balance actuator, the balance speed is jointly influenced by the balance actuator, a driving circuit and a control algorithm, and the driving circuit influences the single-step action time of a balance weight disc in the actuator in the automatic balance process so as to influence the balance speed. When the voltage input to the inductance coil is large, induced electromotive force far larger than the input voltage can be generated at the moment of ending the voltage pulse, key control elements in the driving circuit are easy to break down, and the safety and reliability of the driving circuit are affected.
In some prior arts, a driving device of an on-line magnetic balance head exciting coil is provided, which consists of a voltage regulating circuit and a current regulating circuit. The voltage regulating circuit is composed of a comparison circuit, a MOSFET driving circuit, a MOSFET and a filter circuit. The voltage regulating circuit can convert the voltage signal output by the controller into a power signal similar to the waveform of the voltage signal based on the modules. The current regulating circuit can change the current direction of the power signal output by the voltage regulating circuit in a staggered way by controlling the on-off state of the H bridge circuit on the bridge, thereby meeting the working requirement of the load coil of the dynamic balance head. However, this prior art adopts a voltage that varies with time within one pulse width, which increases the complexity and control difficulty of the driving circuit, and it is difficult to obtain an ideal voltage waveform due to delay and disturbance of the response of the actual circuit.
In other prior art, a PC/104 bus based electromagnetic automatic balance actuator drive is provided. The device adopts PC/104 bus industrial personal computer and solid state relay to realize pulse output, but solid state relay control accuracy is low, response speed is slow, interference killing feature is poor, is bulky, and work must install the radiator and break down by reverse electromotive force easily under high output voltage, is unfavorable for integration and optimization of drive circuit very much.
Therefore, when the existing electromagnetic balance actuator realizes the actuation control of the balance weight disc, the driving current with positive and negative alternation is adopted, but the driving voltage is lower, and longer power-off time exists when the forward current and the reverse current are switched, so that the structural design of the balance actuator is influenced, and the single-step action time of the electromagnetic actuator is increased to a certain extent; some compound driving circuits have larger control difficulty, are difficult to output stable and ideal voltage waveforms, and are not beneficial to the accurate control of the electromagnetic balance actuator; the electromagnetic balance actuator needs large driving power, and the driving circuit is difficult to provide the required high-volume instantaneous driving power.
Therefore, providing a driving circuit capable of generating a positive and negative alternate pulse voltage to generate a positive and negative pulse voltage signal with accurate pulse width, thereby improving the control accuracy of the balance actuator and shortening the balance adjustment time is a problem to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the embodiment of the invention provides a driving circuit capable of generating positive and negative alternate pulse voltage so as to generate positive and negative pulse voltage signals with accurate and adjustable pulse width, thereby improving the control precision of a balance actuator and shortening the balance adjustment time.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a driving circuit capable of generating a positive-negative alternating pulse voltage, the driving circuit comprising:
a signal control module;
the forward current output module is electrically connected with the load coil and provides forward current for the load coil under the conduction signal of the signal control module;
the negative current output module is electrically connected with the load coil and provides negative current for the load coil under the conduction signal of the signal control module; the positive current output module, the negative current output module and the load coil form a bridge circuit structure so that the current output to the load coil can be commutated;
and the power supply module is respectively and electrically connected with the positive current output module and the negative current output module.
In some embodiments, the forward current output module is a forward current output circuit comprising:
the input control end of the first solid-state relay is connected with the signal control module, the input end of the first solid-state relay is connected with the positive electrode of the power supply module, and the output end of the first solid-state relay is electrically connected with the load coil through a first diode;
the input control end of the fourth solid-state relay is connected with the signal control module, the fourth solid-state relay is connected with the first solid-state relay in series, and the output end of the fourth solid-state relay is communicated with the negative electrode of the power supply module through a fourth diode;
a first protection resistor connected in parallel with the first solid state relay;
and the fourth protection resistor is connected with the fourth solid-state relay in parallel.
In some embodiments, the forward current output circuit further comprises:
and the first timer and the fourth solid state relay are electrically connected with the power supply module through the first timer.
In some embodiments, the negative current output module is a negative current output circuit comprising:
the input control end of the second solid-state relay is connected with the signal control module, the input end of the second solid-state relay is connected with the positive electrode of the power supply module, and the output end of the second solid-state relay is electrically connected with the load coil through a second diode;
the input control end of the third solid-state relay is connected with the signal control module, the third solid-state relay is connected with the second solid-state relay in series, and the output end of the third solid-state relay is communicated with the negative electrode of the power supply module through a third diode;
the second protection resistor is connected with the second solid-state relay in parallel;
and the third protection resistor is connected with the third solid-state relay in parallel.
In some embodiments, the negative current output circuit further comprises:
and the second timer and the third solid state relay are electrically connected with the power supply module through the second timer.
In some embodiments, the power module is a dc power supply electrically connected to the positive current output circuit and the negative current output circuit through a switch.
In some embodiments, the power module includes a drive power supply integrated in a drive chip.
In some embodiments, the power module further comprises an auxiliary power module for providing auxiliary power to the signal control module and the bridge output module.
In some embodiments, the output end of the driver of the signal control module is connected with the gate of the insulated gate bipolar transistor through a gate resistor R4; the reference end of the driver is connected with the emitter of the insulated gate bipolar transistor through a gate resistor R6; and the detection end of the driver is connected with the collector electrode of the insulated gate bipolar transistor through a high-voltage isolation diode.
In some embodiments, the bridge structure includes bridge input ports X1, X4 connected to the main power supply output, IGBT gates v_g1, v_g2, v_g3, v_g4 and IGBT emitters v_e1, v_e2, v_e3, v_e4 connected to the signal control module to amplify the signal power, bridge output ports X2, X3 connected to the inductor, Q1, Q2, Q3, Q4 as the core component IGBT, piezoresistor R12, and bidirectional zener diode D7 to provide a dual overvoltage protector for the circuit.
In one or more embodiments, the driving circuit capable of generating the positive and negative alternate pulse voltage provided by the invention has the following technical effects:
1. the driving circuit can also be used for an electromagnetic automatic balancing device to solve the problems of large volume, poor compatibility with input control signals, complex wiring, low integration level, low output voltage, low output current, low pulse precision, poor reliability and the like of the traditional electromagnetic automatic balancing driving circuit.
2. Compared with the traditional driving circuit of the automatic balancing device, the driving circuit provided by the invention has the advantages of small volume, simple input signal control, high integration level, high pulse precision, strong heat dissipation, strong environmental adaptability, easy installation and debugging, high stability, safety, reliability and the like, and because multiple protection measures such as piezoresistors, redundant elements, overcurrent and overvoltage are added into the circuit, the safety of the driving circuit is greatly improved, and the controlled equipment is indirectly protected.
3. The driving circuit provided by the invention has the advantages of high rated power, high driving voltage, far greater driving current than the driving circuits of the same type, suitability for automatic balancing devices with very large pulse current, capability of repeatedly bearing induced electromotive force and working normally when the driving current is used at high frequency above 30A, and remarkable heat dissipation effect, and key elements of the driving circuit are always controlled at the temperature below 50 ℃.
4. The driving circuit provided by the invention has a larger output voltage adjusting range and a pulse width adjusting range, can output rectangular voltage with proper pulse width according to the actual requirement of the automatic balancing device, is convenient for controlling different types of automatic balancing devices, has excellent environmental adaptability, and can safely and stably work in both actual working environments and laboratory tests.
5. The driving circuit provided by the invention has higher input control signal compatibility, can be connected with control board cards with different types of output signals, can normally work after being connected with the output terminal of the millisecond timer, has different shapes of interfaces, and effectively avoids the condition of damaging the circuit due to misplug of operators.
6. The driving circuit provided by the invention has the advantages of strong anti-interference capability, long service life, high response speed, stable and clean output driving voltage, extremely small error of the actual pulse width of the pulse signal compared with the set pulse width and higher control precision.
In general, the driving circuit capable of generating the positive and negative alternate pulse voltage provided by the invention can generate the positive and negative alternate pulse voltage to generate the positive and negative pulse voltage signal with accurate and adjustable pulse width, thereby improving the control precision of the balance actuator and shortening the balance adjustment time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a schematic diagram of a driving circuit capable of generating a positive-negative alternating pulse voltage according to an embodiment of the present invention;
FIG. 2 is a driving circuit diagram of the embodiment shown in FIG. 1;
FIG. 3 is a schematic diagram of another embodiment of a driving circuit capable of generating a positive and negative alternating pulse voltage according to the present invention;
FIG. 4 is a circuit diagram of the signal control module in the embodiment shown in FIG. 3;
fig. 5 is a circuit diagram of the bridge module in the embodiment shown in fig. 3.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the above problems, the present invention provides a driving circuit for controlling the on/off of an external output loop and current commutation by using a switching device based on the driving principle of an electromagnetic balance actuator, wherein the switching device may be a triode, a MOS transistor, an optocoupler, a relay or other similar elements, and the switching device is controlled by using a driving switching signal. The invention uses the driving circuits built by the solid-state relay and the IGBT elements as examples to describe the specific composition and the implementation method of the driving circuit, but the driving circuits built by other switch elements are also within the protection scope of the application. It should be appreciated that different drive circuits for the two control core elements are suitable for use with electromagnetic balance actuators having different power requirements.
The driving circuit provided by the invention can generate positive and negative alternate pulse voltages and comprises a signal control module, a positive current output module, a negative current output module and a power supply module; the forward current output module is electrically connected with the load coil and provides forward current for the load coil under the conduction signal of the signal control module; the negative current output module is electrically connected with the load coil and provides negative current for the load coil under the conduction signal of the signal control module; the positive current output module, the negative current output module and the load coil form a bridge circuit structure so that the current output to the load coil can be commutated; the power supply module is electrically connected with the positive current output module and the negative current output module respectively.
In one embodiment, taking a driving circuit built by a solid-state relay as an example, the positive current output module is a positive current output circuit, and the negative current output module is a negative current output circuit. The forward current output circuit comprises a first solid-state relay 11, a fourth solid-state relay 22, a first protection resistor 13, a fourth protection resistor 24 and a first timer 15, wherein an input control end of the first solid-state relay is connected with the signal control module, an input end of the first solid-state relay is connected with a positive electrode of the power supply module 28, and an output end of the first solid-state relay is electrically connected with the load coil 4 through a first diode 16; the input control end of the fourth solid-state relay is connected with the signal control module, the fourth solid-state relay is arranged in series with the first solid-state relay, and the output end of the fourth solid-state relay is communicated with the negative electrode of the power supply module through a fourth diode 27; the first protection resistor is connected with the first solid-state relay in parallel; the fourth protection resistor is connected with the fourth solid-state relay in parallel, and the first solid-state relay and the fourth solid-state relay are electrically connected with the power module through the first timer.
In this embodiment, the negative current output circuit includes a second solid state relay 21, a third solid state relay 12, a second protection resistor 23, a third protection resistor 14, and a second timer 25; the input control end of the second solid-state relay is connected with the signal control module, the input end of the second solid-state relay is connected with the positive electrode of the power supply module, and the output end of the second solid-state relay is electrically connected with the load coil through a second diode 26; the input control end of the third solid-state relay is connected with the signal control module, the third solid-state relay is connected with the second solid-state relay in series, and the output end of the third solid-state relay is communicated with the negative electrode of the power supply module through a third diode 17; the second protection resistor is connected with the second solid-state relay in parallel; the third protection resistor is connected with the third solid-state relay in parallel, and the second solid-state relay and the third solid-state relay are electrically connected with the power module through the second timer.
The power supply module is a direct current power supply, and the direct current power supply is electrically connected with the positive current output circuit and the negative current output circuit through a change-over switch.
That is, the driving circuit designed with the DC-DC solid state relay as the core mainly comprises electronic components such as solid state relay, DC power supply, cooling fan, millisecond timer, diode and piezoresistor. The control circuit composed of the solid state relay and the diode can respectively generate current pulses with opposite directions on the same inductance coil under the control of the driving switch signal. By setting pulse time in the measurement and control software, the output end of the driving circuit continuously outputs forward and reverse current pulses in the automatic balancing process, so that the balance weight disc in the balance actuator continuously acts without errors, four paths of solid state relays added in the driving circuit are used as redundancy protection, normal operation is continued under the condition that a certain path of relay is broken down, a large amount of heat dissipation of a coil is prevented from damaging the balance actuator, and the control precision can be improved and the safety range can be expanded by the rectifier diode in each control loop.
More specifically, the electromagnetic balance actuator driving circuit which is designed by taking a direct current control direct current solid state relay as a core and is realized by a solid state relay and a diode mainly comprises four solid state relays (namely a first solid state relay, a second solid state relay, a third solid state relay and a fourth solid state relay), two millisecond-level electronic timers (namely the first timer and the second timer), four rectifier diodes (namely the first diode, the second diode, the third diode and the fourth diode), a direct current breaker, a change-over switch, resistors (namely the first protection resistor, the second protection resistor, the third protection resistor and the fourth protection resistor), a direct current power supply, a cooling fan, a switch and other elements, wherein the driving principle is shown in fig. 1. As shown in fig. 2, in the driving circuit, a driving switch signal (digital output signal) can be directly connected to an input control end of the solid-state relay for on-off control, or can be connected to the solid-state relay after a pulse width is set by a millisecond electronic timer, and then the timer is controlled by the switch signal to further control the on-off of the solid-state relay. The high-power direct current power supply, the two solid state relays, the two diodes, the protection resistor and the timer form a forward current output loop of the load, and the reverse current output loop is identical to the forward current output loop in composition and realizes current reversing output to a driving load through a bridge circuit structure. The change-over switch shown in fig. 2 can realize manual control and automatic control and switch arbitrarily, and manual control is convenient to debug the device, and automatic control is convenient and software combines to improve work efficiency. The ideal driving voltage waveform with any pulse width can be stably output under the control of the driving switch signal, a resistor and a piezoresistor are connected in parallel at two ends of the coil, and the piezoresistor is also connected in parallel at the output end of the solid-state relay. When the power is off, the induced potential generated by the coil is discharged through the resistors connected in parallel at the two ends of the coil, and if the voltage of the coil still exceeds the action voltage of the piezoresistor, the piezoresistor is conducted, so that the induced electromotive force is rapidly reduced, and the safety of the solid-state relay is protected. The piezoresistor connected in parallel with the output end of the solid-state relay is a second defense line for protecting the solid-state relay.
In one embodiment, taking a driving circuit built by IGBT elements as an example, the driving circuit mainly includes a main power module 100, an auxiliary power module 200, a signal control module 300, and a bridge output module 400. The driving chip is provided with an isolated driving power supply and stabilizes 15V input voltage. Can be directly used according to a default value, and can also adjust the dead zone time and the restarting time after the fault according to the requirement. The setting of the threshold of the collector-emitter voltage when the IGBT is short-circuited can be finely adjusted by using a resistor, and can also be adjusted by using a voltage stabilizing tube. The high-level soft turn-off mode can effectively protect the damage of the self-induced electromotive force generated in the IGBT short circuit to the element, and is very compatible with an inductance control circuit. The main power supply module provides positive and negative driving total power for the bridge output module, and the auxiliary power supply module provides auxiliary power for the signal control module and the bridge output module. The component IRM-30-15 is used as an auxiliary power supply to provide stable voltage for the signal control module, and the component XL1509-5.0 provides voltage for the cooling fan. The main power supply module is not only provided with circuit detection such as overcurrent, overvoltage and the like so as to ensure the long-period safe operation of the driving circuit. The driving circuit is provided with a voltage display panel, a current display panel, a Z-LED, an F-LED and other indicator lamps for representing the working state of the driving circuit in real time, so that operators can master the output voltage, the current and the direction at any time. The QD831P power supply input requires a stable voltage input and the capacitor C9, power is calculated based on the actual power used, taking into account 80% efficiency, i.e. the power of the input supply voltage. The power of the power supply can be used with a margin of two times. And the isolated power supply output part is connected with non-inductive capacitors or Cbb capacitors C1, C2, C3, C4, C5 and C6 with low impedance which are connected in parallel beside the filtering electrolytic capacitor. The output end Vo of the driver is connected with the grid electrode of the IGBT through an external resistor R4; the reference end Com of the driver is connected with the emitter of the IGBT through a resistor R6; the detection end Detect of the driver is connected with the collector of the IGBT through high voltage isolation diodes R3, D2, D3. The grid resistance is R6, and the resistor R5 connected in parallel between the grid and the emitter of the IGBT is a bleeder resistor, so that the IGBT is prevented from being burned by the Miller effect due to accidental high voltage of main power under the condition that a driving lead is not connected. D2 and D3 detect the turn-on voltage drop Vces of the IGBT to determine whether the IGBT is over-current. And a D4 bidirectional voltage stabilizing tube is connected between the grid electrode and the emitter electrode of the IGBT in parallel. The bridge input ports X1 and X4 are connected with a main power supply to output, the IGBT gates V_G1, V_G2, V_G3 and V_G4 and the IGBT emitters V_E1, V_E2, V_E3 and V_E4 are connected with a signal control module to amplify signal power, the bridge output ports X2 and X3 are connected with induction coils, Q1, Q2, Q3 and Q4 are core components IGBT, a piezoresistor R12 and a bidirectional voltage stabilizing diode D7 provide double overvoltage protection for a circuit, and a driver is not damaged even if the output coils are short-circuited. The electronic elements of the bridge output module are alternately switched on and off according to the sequence and the number designated by the signal control module, so that high-voltage positive-negative alternating pulse signals with arbitrary duty ratio can be generated, and compared with the output of the traditional solid-state relay, the stability and the accuracy of the pulse signals are greatly improved.
In this embodiment, the power supply module includes a driving power supply integrated in the driving chip, and further includes an auxiliary power supply module for providing auxiliary power to the signal control module and the bridge output module. The output end of the driver of the signal control module is connected with the grid electrode of the insulated gate bipolar transistor through a grid electrode resistor R4; the reference end of the driver is connected with the emitter of the insulated gate bipolar transistor through a gate resistor R6; and the detection end of the driver is connected with the collector electrode of the insulated gate bipolar transistor through a high-voltage isolation diode. The bridge circuit structure comprises bridge circuit input ports X1 and X4 which are connected with a main power supply to output, IGBT grid electrodes V_G1, V_G2, V_G3 and V_G4 and IGBT emitter electrodes V_E1, V_E2, V_E3 and V_E4 which are connected with a signal control module to amplify signal power, the bridge circuit output ports X2 and X3 are connected with induction coils, Q1, Q2, Q3 and Q4 are core components IGBT, and a piezoresistor R12 and a bidirectional voltage-stabilizing diode D7 provide a double overvoltage protector for the circuit.
Specifically, the drive circuit for controlling the current direction by using the bridge designed by taking the medium and high power IGBT drive chip as a core element also takes the drive switch signal as a control signal for starting, disconnecting and reversing the circuit, and the output forward pulse and the output reverse pulse have the same amplitude, the same pulse width and opposite directions, and the rising edge time and the falling edge time are also the same. The redundancy protection and the mutual exclusion protection are added in the circuit, so that the safety and the reliability of output voltage pulses are greatly improved, the voltage-sensitive protection resistors are connected in parallel at both ends of the actuator coil and both ends of the key control element, and the protection driving circuit and the balance actuator work stably for a long period.
In this embodiment, the driving circuit for controlling the current direction of the bridge designed by using the IGBT driving chip as the core element is mainly divided into four modules, which are a main power module, an auxiliary power module, a signal control module, and a bridge output module, respectively, as shown in fig. 3.
The drive chip is provided with an isolated drive power supply, and stabilizes the 15V input voltage. Can be directly used according to a default value, and can also adjust the dead zone time and the restarting time after the fault according to the requirement. The setting of the threshold of the collector-emitter voltage when the IGBT is short-circuited can be finely adjusted by using a resistor, and can also be adjusted by using a voltage stabilizing tube. The high-level soft turn-off mode can effectively protect the damage of the self-induced electromotive force generated in the IGBT short circuit to the element, and is very compatible with an inductance control circuit.
The main power supply module provides positive and negative driving total power for the bridge output module, and the auxiliary power supply module provides auxiliary power for the signal control module and the bridge output module. The component IRM-30-15 is used as an auxiliary power supply to provide stable voltage for the signal control module, and the component XL1509-5.0 provides input voltage for the cooling fan. The main power supply module is not only provided with circuit detection such as overcurrent, overvoltage and the like so as to ensure the long-period safe operation of the driving circuit. The driving circuit is provided with a voltage display panel, a current display panel, a Z-LED, an F-LED and other indicator lamps for representing the working state of the driving circuit in real time, so that operators can master the output voltage, the current and the direction at any time.
The signal control module part circuit is shown in fig. 4. The output end Vo of the driver is connected with the grid electrode of the IGBT through an external resistor R4; the reference end Com of the driver is connected with the emitter of the IGBT through a resistor R6; the detection end Detect of the driver is connected with the collector of the IGBT through high voltage isolation diodes R3, D2, D3. The grid resistance is R6, and the resistor R5 connected in parallel between the grid and the emitter of the IGBT is a bleeder resistor, so that the IGBT is prevented from being burned by the Miller effect due to accidental high voltage of main power under the condition that a driving lead is not connected. D2 and D3 detect the turn-on voltage drop Vces of the IGBT to determine whether the IGBT is over-current. And a D4 bidirectional voltage stabilizing tube is connected between the grid electrode and the emitter electrode of the IGBT in parallel.
The schematic circuit diagram of the bridge module is shown in fig. 5, wherein the bridge input ports X1 and X4 are connected with the main power supply for outputting, the IGBT gates v_g1, v_g2, v_g3, v_g4 and the IGBT emitters v_e1, v_e2, v_e3, v_e4 are connected with the signal control module for amplifying signal power, the bridge output ports X2 and X3 are connected with the induction coils, Q1, Q2, Q3, Q4 are core components IGBT, the piezoresistor R12 and the bidirectional voltage stabilizing diode D7 provide double overvoltage protection for the circuit, and even if the output coils are short-circuited, the driver is not damaged. When the IGBT is reliably turned off, even if the driving circuit outputs large transient current, the impact on the IGBT is avoided, so that the IGBT is damaged, the misleading of the IGBT is effectively reduced, and the reliability of the IGBT is improved. The electronic elements of the bridge output module are alternately switched on and off according to the sequence and the number designated by the signal control module, so that high-voltage positive-negative alternating pulse signals with arbitrary duty ratio can be generated, and compared with the output of the traditional solid-state relay, the stability and the accuracy of the pulse signals are greatly improved.
In one or more embodiments, the driving circuit capable of generating the positive and negative alternate pulse voltage provided by the invention has the following technical effects:
1. the driving circuit can also be used for an electromagnetic automatic balancing device to solve the problems of large volume, poor compatibility with input control signals, complex wiring, low integration level, low output voltage, low output current, low pulse precision, poor reliability and the like of the traditional electromagnetic automatic balancing driving circuit.
2. Compared with the traditional driving circuit of the automatic balancing device, the driving circuit provided by the invention has the advantages of small volume, simple input signal control, high integration level, high pulse precision, strong heat dissipation, strong environmental adaptability, easy installation and debugging, high stability, safety, reliability and the like, and because multiple protection measures such as piezoresistors, redundant elements, overcurrent and overvoltage are added into the circuit, the safety of the driving circuit is greatly improved, and the controlled equipment is indirectly protected.
3. The driving circuit provided by the invention has the advantages of high rated power, high driving voltage, far greater driving current than the driving circuits of the same type, suitability for automatic balancing devices with very large pulse current, capability of repeatedly bearing induced electromotive force and working normally when the driving current is used at high frequency above 30A, and remarkable heat dissipation effect, and key elements of the driving circuit are always controlled at the temperature below 50 ℃.
4. The driving circuit provided by the invention has a larger output voltage adjusting range and a pulse width adjusting range, can output rectangular voltage with proper pulse width according to the actual requirement of the automatic balancing device, is convenient for controlling different types of automatic balancing devices, has excellent environmental adaptability, and can safely and stably work in both actual working environments and laboratory tests.
5. The driving circuit provided by the invention has higher input control signal compatibility, can be connected with control board cards with different types of output signals, can normally work after being connected with the output terminal of the millisecond timer, has different shapes of interfaces, and effectively avoids the condition of damaging the circuit due to misplug of operators.
6. The driving circuit provided by the invention has the advantages of strong anti-interference capability, long service life, high response speed, stable and clean output driving voltage, extremely small error of the actual pulse width of the pulse signal compared with the set pulse width and higher control precision.
In general, the driving circuit capable of generating the positive and negative alternate pulse voltage provided by the invention can generate the positive and negative alternate pulse voltage to generate the positive and negative pulse voltage signal with accurate and adjustable pulse width, thereby improving the control precision of the balance actuator and shortening the balance adjustment time.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in a combination of hardware and software. When the software is applied, the corresponding functions may be stored in a computer-readable medium or transmitted as one or more instructions or code on the computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, and it should be understood that the foregoing is by way of illustration and description only, and is not intended to limit the scope of the invention.
Claims (10)
1. A driving circuit capable of generating a positive-negative alternating pulse voltage, the driving circuit comprising:
a signal control module;
the forward current output module is electrically connected with the load coil and provides forward current for the load coil under the conduction signal of the signal control module;
the negative current output module is electrically connected with the load coil and provides negative current for the load coil under the conduction signal of the signal control module; the positive current output module, the negative current output module and the load coil form a bridge circuit structure so that the current output to the load coil can be commutated;
and the power supply module is respectively and electrically connected with the positive current output module and the negative current output module.
2. The drive circuit capable of generating a positive-negative alternating pulse voltage according to claim 1, wherein the forward current output module is a forward current output circuit comprising:
the input control end of the first solid-state relay is connected with the signal control module, the input end of the first solid-state relay is connected with the positive electrode of the power supply module, and the output end of the first solid-state relay is electrically connected with the load coil through a first diode;
the input control end of the fourth solid-state relay is connected with the signal control module, the fourth solid-state relay is connected with the first solid-state relay in series, and the output end of the fourth solid-state relay is communicated with the negative electrode of the power supply module through a fourth diode;
a first protection resistor connected in parallel with the first solid state relay;
and the fourth protection resistor is connected with the fourth solid-state relay in parallel.
3. The drive circuit capable of generating a positive-negative alternating pulse voltage according to claim 2, wherein the forward current output circuit further comprises:
and the first solid-state relay and the fourth solid-state relay are electrically connected with the power supply module through the first timer.
4. A driving circuit capable of generating a positive-negative alternating pulse voltage according to claim 3, wherein the negative current output module is a negative current output circuit comprising:
the input control end of the second solid-state relay is connected with the signal control module, the input end of the second solid-state relay is connected with the positive electrode of the power supply module, and the output end of the second solid-state relay is electrically connected with the load coil through a second diode;
the input control end of the third solid-state relay is connected with the signal control module, the third solid-state relay is connected with the second solid-state relay in series, and the output end of the third solid-state relay is communicated with the negative electrode of the power supply module through a third diode;
the second protection resistor is connected with the second solid-state relay in parallel;
and the third protection resistor is connected with the third solid-state relay in parallel.
5. The drive circuit capable of generating a positive-negative alternating pulse voltage according to claim 4, wherein the negative-going current output circuit further comprises:
and the second solid-state relay and the third solid-state relay are electrically connected with the power supply module through the second timer.
6. The driving circuit capable of generating positive and negative alternate pulse voltages according to claim 5, wherein the power supply module is a direct current power supply electrically connected to the positive current output circuit and the negative current output circuit through a change-over switch.
7. The driving circuit capable of generating alternating voltage pulses according to claim 1, wherein the power module includes a driving power supply integrated in a driving chip.
8. The drive circuit of claim 7, wherein the power module further comprises an auxiliary power module for providing auxiliary power to the signal control module and the bridge output module.
9. The driving circuit capable of generating positive and negative alternate pulse voltages according to claim 7, wherein an output end of a driver of the signal control module is connected with a gate of the insulated gate bipolar transistor through a gate resistor R4; the reference end of the driver is connected with the emitter of the insulated gate bipolar transistor through a gate resistor R6; and the detection end of the driver is connected with the collector electrode of the insulated gate bipolar transistor through a high-voltage isolation diode.
10. The driving circuit as defined in claim 7, wherein the bridge structure comprises bridge input ports X1 and X4 connected to the main power supply output, IGBT gates v_g1, v_g2, v_g3, v_g4 and IGBT emitters v_e1, v_e2, v_e3, v_e4 connected to the signal control module to amplify the signal power, bridge output ports X2 and X3 connected to the inductor, Q1, Q2, Q3, Q4 being core components IGBT, and piezoresistor R12 and bidirectional zener diode D7 providing a dual overvoltage protector for the circuit.
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| CN202310511160.1A CN116247959A (en) | 2023-05-08 | 2023-05-08 | Driving circuit capable of generating positive and negative alternate pulse voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310511160.1A CN116247959A (en) | 2023-05-08 | 2023-05-08 | Driving circuit capable of generating positive and negative alternate pulse voltage |
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| CN116247959A true CN116247959A (en) | 2023-06-09 |
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| CN202310511160.1A Pending CN116247959A (en) | 2023-05-08 | 2023-05-08 | Driving circuit capable of generating positive and negative alternate pulse voltage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117116707A (en) * | 2023-10-25 | 2023-11-24 | 宁德时代新能源科技股份有限公司 | Drive control circuit, drive control method, drive control device, and storage medium |
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| CN105305789A (en) * | 2015-10-26 | 2016-02-03 | 中国科学院声学研究所 | Switch circuit of power switching |
| CN209267426U (en) * | 2018-12-04 | 2019-08-16 | 苏州共元自控技术有限公司 | A kind of integrated multipurpose IGBT control driving device |
| CN110834716A (en) * | 2019-11-20 | 2020-02-25 | 北京化工大学 | Embedded pulse generator for automatic balance of propeller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1300176A (en) * | 1999-12-14 | 2001-06-20 | 中国科学院金属研究所 | Variable frequency induction heater |
| CN105305789A (en) * | 2015-10-26 | 2016-02-03 | 中国科学院声学研究所 | Switch circuit of power switching |
| CN209267426U (en) * | 2018-12-04 | 2019-08-16 | 苏州共元自控技术有限公司 | A kind of integrated multipurpose IGBT control driving device |
| CN110834716A (en) * | 2019-11-20 | 2020-02-25 | 北京化工大学 | Embedded pulse generator for automatic balance of propeller |
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| CN117116707A (en) * | 2023-10-25 | 2023-11-24 | 宁德时代新能源科技股份有限公司 | Drive control circuit, drive control method, drive control device, and storage medium |
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Application publication date: 20230609 |