Drive Circuit and Drive System

Abstract

The present invention provides a driving circuit, which includes a conditioning module, a control module, a first generation module, a second generation module, a driving module and an actuator; the conditioning module is connected to the control module, the control module is connected to the second generation module, the second generation module is connected to the driving module, and the driving module is connected to the actuator; the first generation module is connected to the second generation module. The present invention also provides a driving system. The driving circuit and the driving system provided by the present invention drive the actuator to act after performing various arithmetic operations on the position control signal sent by the actuator, so as to control the throttle of the actuator to achieve 0-100% adjustment, with simple operation, flexible use and high reliability.

Description

Technical Field

[0001] The present invention relates to the field of drive technology, and in particular to a drive circuit and a drive system.

Background Art

[0002] As a prime mover mechanism, when the load of a diesel engine suddenly changes, the fuel supply of the diesel engine becomes a very crucial control. Good fuel supply control can not only adapt to the change of the load of the diesel engine and keep the diesel engine running stably, but also effectively improve the performance of the engine. At present, at home and abroad, an electronic speed controller plus actuator control scheme is usually adopted to achieve this goal. The overall scheme includes an electro-hydraulic actuator control scheme and a pure electric actuator control scheme. Therefore, it is very crucial to improve the adaptability of the electronic speed controller to achieve good fuel supply control.

[0003] In view of this, it is necessary to provide a new type of drive circuit and drive system to overcome the above defects.

Summary of the Invention

[0004] The purpose of the present invention is to provide a drive circuit and a drive system. After performing various arithmetic operations on the position control signal sent by the actuator, the actuator is driven to act, so as to control the throttle of the actuator to achieve 0-100% adjustment. The operation is simple, the use is flexible, and the reliability is high.

[0005] To achieve the above purpose, in a first aspect, the present invention provides a drive circuit, including a conditioning module, a control module, a first generation module, a second generation module, a drive module and an actuator; the conditioning module is connected to the control module, the control module is connected to the second generation module, the second generation module is connected to the drive module, and the drive module is connected to the actuator; the first generation module is connected to the second generation module; the actuator is used to send a position control signal to the conditioning module, the conditioning module is used to obtain a corrected position signal and a target position signal according to the position control signal, the control module is used to obtain a deviation signal according to the corrected position signal and the target position signal, the first generation module is used to generate a comparison waveform, the second generation module is used to generate a control waveform according to the deviation signal and the comparison waveform, and after the control waveform is input into the drive module, the driving of the actuator is realized.

[0006] In a preferred embodiment, the conditioning module includes a correction circuit and a conversion circuit. The correction circuit is used to obtain the corrected position signal, and the conversion circuit is used to obtain the target position signal.

[0007] In a preferred embodiment, the control module includes an inverse adder circuit and an arithmetic circuit connected to the inverse adder circuit. The adder circuit is configured to calculate a position deviation value based on the corrected position signal and the target position signal, and the arithmetic circuit is configured to perform proportional-integral operation on the position deviation value, and then output the deviation signal.

[0008] In a preferred embodiment, the inverse adder circuit includes a first operational amplifier U1C; the non-inverting input terminal of the first operational amplifier U1C is grounded after being connected to a resistor R2, the corrected position signal is input to the inverting input terminal of the first operational amplifier U1C through a resistor R5 and a capacitor C1, the target position signal is input to the inverting input terminal of the first operational amplifier U1C through a resistor R10 and a resistor R7, and the inverting input terminal of the first operational amplifier U1C is connected to the output terminal of the first operational amplifier U1C through a resistor R8.

[0009] In a preferred embodiment, the arithmetic circuit includes a resistor R4, a variable resistor W1, and a second operational amplifier U1D; one end of the resistor R4 is connected to the output terminal of the first operational amplifier U1C, the other end of the resistor R4 is connected to the first end of the variable resistor W1, the second end of the variable resistor W1 is connected to the inverting input terminal of the second operational amplifier U1D, the inverting input terminal of the second operational amplifier U1D is connected to the output terminal of the second operational amplifier U1D through a resistor R9 and a capacitor C2, the output terminal of the second operational amplifier U1D is connected to the second generation module, and the non-inverting input terminal of the second operational amplifier U1D is grounded after being connected to a resistor R1.

[0010] In a preferred embodiment, the comparison waveform generated by the first generation module is a triangular wave.

[0011] In a preferred embodiment, the first generation module includes a third operational amplifier U2A and a fourth operational amplifier U2B; the non-inverting input terminal of the third operational amplifier U2A is connected to the second generation module through a resistor R11, the inverting input terminal of the third operational amplifier U2A is grounded, the non-inverting input terminal of the third operational amplifier U2A is connected to the output terminal of the third operational amplifier U2A through a resistor R14, the output terminal of the third operational amplifier U2A is connected to the inverting input terminal of the fourth operational amplifier U2B through a resistor R12 and a resistor R13, the non-inverting input terminal of the fourth operational amplifier U2B is grounded, the inverting input terminal of the fourth operational amplifier U2B is connected to the output terminal of the fourth operational amplifier U2B through a capacitor C11, and the output terminal of the fourth operational amplifier U2B is connected to the second generation module.

[0012] In a preferred embodiment, the second generating module includes a fifth op amp U1A and a sixth op amp U1B; the deviation signal is input to the inverting input terminal of the fifth op amp U1A through a resistor R29, the comparison wave is input to the non-inverting input terminal of the fifth op amp U1A through a resistor R26, and the output terminal of the fifth op amp U1A outputs the negative signal of the control waveform; the deviation signal is also input to the non-inverting input terminal of the sixth op amp U1B through a resistor R22, the comparison wave is input to the inverting input terminal of the sixth op amp U1B through a resistor R25, and the output terminal of the sixth op amp U1B outputs the positive signal of the control waveform.

[0013] In a preferred embodiment, the driving module includes an H-bridge driving chip. The control waveform is isolated by an optocoupler and inverted by an inverter, and then input to the input end of the H-bridge driving chip, and output to the actuator through the output end of the H-bridge driving chip.

[0014] In a second aspect, the present invention further provides a driving system, comprising the driving circuit described in any one of the above embodiments.

[0015] Compared with the existing technology, the drive circuit and drive system provided by the present invention have a conditioning module that can correct the received position control signal to obtain a corrected position signal, thereby improving the accuracy of the signal. The control module can calculate the deviation signal based on the corrected position signal and the target position signal. The second generation module finally generates a control waveform based on the deviation signal and the comparison waveform generated by the first generation module. Finally, the control waveform is input into the drive module to realize the driving of the actuator, that is, after performing multiple calculation operations on the position control signal sent by the actuator, the actuator is driven to move, thereby controlling the throttle of the actuator to achieve 0-100% adjustment. The operation is simple, the use is flexible, and the reliability is high.

[0016] In order to make the above-mentioned objects, features and advantages of the invention more obvious and easy to understand, preferred embodiments of the present invention are given below and described in detail with reference to the accompanying drawings.

Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A principle block diagram of the driving circuit provided by the present invention;

[0019] Figure 2Circuit diagram of the control module of the drive circuit provided by the present invention;

[0020] Figure 3 Circuit diagram of the first generation module of the drive circuit provided by the present invention;

[0021] Figure 4 Circuit diagram of the second generation module of the drive circuit provided by the present invention;

[0022] Figure 5 Circuit diagram of the drive module of the drive circuit provided by the present invention;

[0023] Figure 6 Principle block diagram of the drive system provided by the present invention.

Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0025] Please refer to Figure 1 , the present invention provides a drive circuit 100, and the drive circuit 100 includes an adjustment module 10, a control module 20, a first generation module 30, a second generation module 40, a drive module 50 and an actuator 60.

[0026] The adjustment module 10 is connected to the control module 20, the control module 20 is connected to the second generation module 40, the second generation module 40 is connected to the drive module 50, and the drive module 50 is connected to the actuator 60; the first generation module 30 is also connected to the second generation module 40.

[0027] Specifically, the actuator 60 is used to send a position control signal to the adjustment module 10, the adjustment module 10 is used to obtain a corrected position signal and a target position signal according to the position control signal, the control module 20 is used to obtain a deviation signal according to the corrected position signal and the target position signal, the first generation module 30 is used to generate a comparison waveform, the second generation module 40 is used to generate a control waveform according to the deviation signal and the comparison waveform, and after the control waveform is input into the drive module 50, the driving of the actuator 60 is realized.

[0028] The driving circuit 100 provided by the present invention. The conditioning module 10 can correct the received position control signal to obtain a corrected position signal, which can improve the accuracy of the signal. The control module 20 can calculate a deviation signal based on the corrected position signal and the target position signal. The second generation module 40 finally generates a control waveform according to the deviation signal and the comparison waveform generated by the first generation module. Finally, the control waveform is input into the driving module 50 to drive the actuator 60, that is, after performing various arithmetic operations on the position control signal sent by the actuator 60, the actuator 60 is driven to act, so as to control the throttle of the actuator 60 to achieve 0-100% adjustment. The operation is simple, the use is flexible, and the reliability is high.

[0029] Furthermore, the conditioning module 10 includes a correction circuit 11 and a conversion circuit 12. The correction circuit 11 is used to obtain the corrected position signal, and the conversion circuit 12 is used to obtain the target position signal.

[0030] Specifically, the position control signal sent by the actuator 60 needs to be corrected by the correction circuit 11. The correction specifically includes zero position adjustment and full stroke adjustment. For example, in actual application, the position control signal is 4-20 mA. During zero position adjustment, the input of the position control signal is 4 mA, and the zero position adjustable resistor is adjusted so that the position of the actuator 60 reaches the actual zero position. During full scale adjustment, the input of the position control signal is 20 mA, and the full scale adjustable resistor is adjusted so that the position of the actuator 60 reaches the actual full stroke position. It can be understood that after the position control signal is adjusted by zero position and full stroke, the corrected position signal is obtained, and the corrected position signal is used as a relevant factor input to the control module 20.

[0031] In the conversion circuit 12, there is an operational amplifier that can convert the 4-20 mA signal fed back by the position sensor of the actuator 60 into a 0-5 V signal. The magnitude of the voltage value output by the operational amplifier (i.e., the target position signal) corresponds to the position information of the actuator 60, and it is also used as a variable input factor of the control module 20. It can be understood that if the actuator 60 needs to be reset emergently, the output of this operational amplifier in the conversion circuit 12 is grounded, that is, the output signal of the operational amplifier is pulled down to zero, so as to realize the emergency reset input with the target position signal of the control module 20 being zero.

[0032] Furthermore, please refer to Figure 2 , the control module 20 includes an inverting adder circuit 21 and an arithmetic circuit 22 connected to the inverting adder circuit 21. The adder circuit 21 is used to calculate the position deviation value according to the corrected position signal and the target position signal, and the arithmetic circuit 22 is used to perform proportional integral operation on the position deviation value, and then output the deviation signal.

[0033] The reverse adder circuit 21 includes a first operational amplifier U1C. Specifically, the non-inverting input terminal of the first operational amplifier U1C is connected to a resistor R2 and then grounded. The correction position signal is input to the inverting input terminal of the first operational amplifier U1C through a resistor R5 and a capacitor C1. The target position signal is input to the inverting input terminal of the first operational amplifier U1C through a resistor R10 and a resistor R7. The inverting input terminal of the first operational amplifier U1C is connected to the output terminal of the first operational amplifier U1C through a resistor R8.

[0034] Among them, in order to improve the stability of the system, the resistor R5 and the capacitor C1 form a differentiator. After differentiating the position signal, it is input to the inverting adder composed of the first operational amplifier U1C. Thus, the calculated position deviation value not only reflects the actual position deviation but also contains information about the actual position change rate. The magnitude of the differential component can be adjusted by changing the values of the resistor R5 and the capacitor C1. In this embodiment, the correction position signal is also input to the inverting input terminal of the first operational amplifier U1C through a resistor R3. The resistors R3, R10, R7, and R2 are all used for voltage division.

[0035] The operation circuit 22 includes a resistor R4, a variable resistor W1, and a second operational amplifier U1D. One end of the resistor R4 is connected to the output terminal of the first operational amplifier U1C. The other end of the resistor R4 is connected to the first end of the variable resistor W1. The second end of the variable resistor W1 is connected to the inverting input terminal of the second operational amplifier U1D. The inverting input terminal of the second operational amplifier U1D is connected to the output terminal of the second operational amplifier U1D through a resistor R9 and a capacitor C2. The output terminal of the second operational amplifier U1D is connected to the second generation module. The non-inverting input terminal of the second operational amplifier U1D is connected to a resistor R1 and then grounded. In this embodiment, a resistor R6 is also connected between the inverting input terminal and the output terminal of the second operational amplifier U1D. The resistors R6 and R1 are both used for voltage division.

[0036] In the operation circuit 22, the second operational amplifier U1D realizes proportional-integral operation on the output signal of the first U1C. Among them, the calculation formulas for the proportional coefficient Kp and the integral coefficient Ki are respectively:

[0037] Kp = R9 / (R4 + W1);

[0038] Ki = 1 / [(R4 + W1)C2];

[0039] It can be seen that when adjusting the resistance value of the adjustable resistor W1, the proportional coefficient and integral coefficient of the control module 20 will be adjusted simultaneously. Moreover, the control module 20 is built with a pure analog circuit and does not require programming with a microcontroller. It only needs to drive the actuator 60 to act after relevant arithmetic operations based on the externally input 4-20 mA control signal, thereby controlling the throttle of the engine to achieve 0-100% adjustment. The operation is simple, the use is flexible, and the reliability is high.

[0040] Further, please refer to Figure 3 , the comparison waveform generated by the first generation module 30 is a triangular wave, and the first generation module 30 includes a third op-amp U2A and a fourth op-amp U2B. The non-inverting input terminal of the third op-amp U2A is connected to the second generation module 40 through a resistor R11, the inverting input terminal of the third op-amp U2A is grounded, the non-inverting input terminal of the third op-amp U2A is connected to the output terminal of the third op-amp U2A through a resistor R14, the output terminal of the third op-amp U2A is connected to the inverting input terminal of the fourth op-amp U2B through resistors R12 and R13, the non-inverting input terminal of the fourth op-amp U2B is grounded, the inverting input terminal of the fourth op-amp U2B is connected to the output terminal of the fourth op-amp U2B through a capacitor C11, and the output terminal of the fourth op-amp U2B is connected to the second generation module 40.

[0041] It can be understood that the square wave generated by the third op-amp U2A is subjected to constant current charging of the capacitor C11 through the integrating circuit composed of the fourth op-amp U2B. When the charging reaches the set value, the output of the fourth op-amp U2B will be fed back to the non-inverting input terminal of the third op-amp U2A, triggering the output of the third op-amp U2A to flip. At this time, the capacitor C11 will be reversely charged. In this way, a triangular wave output is achieved at the output terminal of the fourth op-amp U2B. In this embodiment, the frequency of the generated triangular wave is f = R14 / [4 * R11 * (R12 + R13) * C11].

[0042] Further, please refer to Figure 4 , the second generation module 40 includes a fifth op-amp U1A and a sixth op-amp U1B, and the second generation module 40 is used to generate a control waveform, that is, a PWM (Pulse Width Modulation) wave.

[0043] Specifically, the deviation signal is input to the inverting input terminal of the fifth operational amplifier U1A through the resistor R29, the comparison wave is input to the non-inverting input terminal of the fifth operational amplifier U1A through the resistor R26, and the output terminal of the fifth operational amplifier U1A outputs the negative signal of the control waveform, that is, PWM-; the deviation signal is also input to the non-inverting input terminal of the sixth operational amplifier U1B through the resistor R22, the comparison wave is input to the inverting input terminal of the sixth operational amplifier U1B through the resistor R25, and the output terminal of the sixth operational amplifier U1B outputs the positive signal of the control waveform, that is, PWM+.

[0044] Understandably, Figure 4 In the control module 20, the deviation signal calculated is compared with the triangular wave generated by the first generation module 30, and the PWM+ and PWM- signals for driving the motor in the actuator 60 to rotate forward or backward can be obtained. Among them, the duty cycle change range of the PWM wave is 0-100%.

[0045] Further, please refer to Figure 5 , the driving module 50 includes an H-bridge driving chip U3. After the control waveform is isolated by an optocoupler and inverted by an inverter, it is input to the input terminal of the H-bridge driving chip U3, and is output from the output terminal of the H-bridge driving chip U3 to the actuator 60.

[0046] Specifically, the PWM+ and PWM- signals obtained by the previous circuit are isolated by optocouplers U3A and U3B, inverted by inverters U2C and U2D, and then input to the input terminals INA and INB of the H-bridge driving chip U3, and output from the output terminals OUTA and OUTB to the motor in the actuator 60, thereby driving the motor to move. That is, a dual-channel output driving circuit 100 built with a pure analog circuit is realized, which can drive the actuator 60 with a dual-coil motor. In this embodiment, one H-bridge driving circuit is taken as an example; in other embodiments, if the number of motors in the actuator 60 is two, two H-bridge driving circuits are correspondingly set. The H-bridge driving chip U3 adopts a highly integrated H-bridge driving chip, which is widely used in the driving circuits of related motors in automobiles and has high reliability.

[0047] The actuator 60 includes one or more motors. In this embodiment, the number of motors is two. The actuator 60 further includes a position sensor 61. The position sensor 61 can sense the position of the motor rotation and send a position control signal to the conditioning module 10 to control the rotation of the motor.

[0048] The driving circuit 100 provided by the present invention further includes a power supply module, which is used to provide the power required for the entire driving circuit 100. For example, it is used to supply power to the post-stage driving logic circuit, the positive and negative power supplies of relevant operational amplifiers, each reference voltage used in each part of the circuit, and the position sensor of the actuator. It can be understood that, in order to improve the reliability of the entire driving circuit 100, anti-interference processing should be performed on the power input to improve the anti-interference suppression of the power supply.

[0049] Please refer to Figure 6 , the present invention further provides a driving system 200, including the driving circuit 100 described in any one of the above. It can be understood that the driving system 200 may further include an electronic speed controller 201 and an engine 202. The electronic speed controller 201 is connected to the driving circuit 100, and the driving circuit 100 is connected to the engine 202. The driving circuit 100 is installed as a separate driving module between the electronic speed controller 201 and the engine 202, so that the speed control system can realize the switching between the electro-hydraulic actuator control mode and the pure electric actuator control mode by simply increasing or decreasing the driving module. It should be noted that all embodiments of the driving circuit 100 provided by the present invention are applicable to the driving system provided by the present invention, and can achieve the same or similar beneficial effects.

[0050] In summary, for the driving circuit 100 and the driving system 200 provided by the present invention, the conditioning module 10 can correct the received position control signal to obtain a corrected position signal, which can improve the accuracy of the signal. The control module 20 can calculate a deviation signal based on the corrected position signal and the target position signal. The second generation module 40 finally generates a control waveform according to the deviation signal and the comparison waveform generated by the first generation module 30, and finally inputs the control waveform into the driving module 50 to drive the actuator 60, that is, it realizes driving the actuator 60 to act after performing various arithmetic operations on the position control signal sent by the actuator 60, thereby controlling the throttle of the actuator 60 to achieve 0-100% adjustment, with simple operation, flexible use, and high reliability.

[0051] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A driving circuit, characterized in that: It includes a conditioning module, a control module, a first generating module, a second generating module, a driving module and an actuator; the conditioning module is connected to the control module, the control module is connected to the second generating module, the second generating module is connected to the driving module, and the driving module is connected to the actuator; the first generating module is connected to the second generating module; The actuator is used to send a position control signal to the conditioning module, the conditioning module is used to obtain a corrected position signal and a target position signal based on the position control signal, the control module is used to obtain a deviation signal based on the corrected position signal and the target position signal, the first generation module is used to generate a comparison waveform, and the second generation module is used to generate a control waveform based on the deviation signal and the comparison waveform. After the control waveform is input into the driving module, the actuator is driven.

2. The driving circuit according to claim 1, wherein: The conditioning module includes a correction circuit and a conversion circuit. The correction circuit is used to obtain the corrected position signal, and the conversion circuit is used to obtain the target position signal.

3. The driving circuit according to claim 1, wherein: The control module includes an inverse adder circuit and an operation circuit connected to the inverse adder circuit, the inverse adder circuit is used to calculate the position deviation value based on the corrected position signal and the target position signal, and the operation circuit is used to perform proportional integral operation on the position deviation value, and then output the deviation signal.

4. The driving circuit according to claim 3, wherein: The reverse adder circuit includes a first operational amplifier U1C; the non-inverting input terminal of the first operational amplifier U1C is connected to the resistor R2 and then grounded, the corrected position signal is input to the inverting input terminal of the first operational amplifier U1C through the resistor R5 and the capacitor C1, the target position signal is input to the inverting input terminal of the first operational amplifier U1C through the resistor R10 and the resistor R7, and the inverting input terminal of the first operational amplifier U1C is connected to the output terminal of the first operational amplifier U1C through the resistor R8.

5. The driving circuit according to claim 4, wherein: The operational circuit includes a resistor R4, an adjustable resistor W1 and a second operational amplifier U1D; one end of the resistor R4 is connected to the output end of the first operational amplifier U1C, the other end of the resistor R4 is connected to the first end of the adjustable resistor W1, the second end of the adjustable resistor W1 is connected to the inverting input end of the second operational amplifier U1D, the inverting input end of the second operational amplifier U1D is connected to the output end of the second operational amplifier U1D through a resistor R9 and a capacitor C2, the output end of the second operational amplifier U1D is connected to the second generation module, and the non-inverting input end of the second operational amplifier U1D is connected to the resistor R1 and then grounded.

6. The driving circuit according to claim 1, wherein: The comparison waveform generated by the first generating module is a triangle wave.

7. The driving circuit according to claim 6, wherein: The first generation module includes a third op amp U2A and a fourth op amp U2B; the non-inverting input terminal of the third op amp U2A is connected to the second generation module through a resistor R11, the inverting input terminal of the third op amp U2A is grounded, the non-inverting input terminal of the third op amp U2A is connected to the output terminal of the third op amp U2A through a resistor R14, the output terminal of the third op amp U2A is connected to the inverting input terminal of the fourth op amp U2B through resistors R12 and R13, the non-inverting input terminal of the fourth op amp U2B is grounded, the inverting input terminal of the fourth op amp U2B is connected to the output terminal of the fourth op amp U2B through a capacitor C11, and the output terminal of the fourth op amp U2B is connected to the second generation module.

8. The driving circuit according to claim 1, wherein: The second generating module includes a fifth operational amplifier U1A and a sixth operational amplifier U1B; The deviation signal is input to the inverting input terminal of the fifth operational amplifier U1A through the resistor R29, the comparison waveform is input to the non-inverting input terminal of the fifth operational amplifier U1A through the resistor R26, and the output terminal of the fifth operational amplifier U1A outputs the negative signal of the control waveform; The deviation signal is also input to the non-inverting input terminal of the sixth operational amplifier U1B through the resistor R22, the comparison waveform is input to the inverting input terminal of the sixth operational amplifier U1B through the resistor R25, and the output terminal of the sixth operational amplifier U1B outputs the positive signal of the control waveform.

9. The driving circuit according to claim 1, wherein: The driving module includes an H-bridge driving chip. The control waveform is input to the input end of the H-bridge driving chip after being isolated by an optical coupler and inverted by an inverter, and is output to the actuator through the output end of the H-bridge driving chip.

10. A drive system, characterized in that: The drive circuit comprises the drive circuit according to any one of claims 1 to 9.

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