阅读说明：本技术 基于mosfet的电磁换向阀节能驱动电路 (Energy-saving drive circuit of electromagnetic directional valve based on MOSFET ) 是由 刘任豪 苏世彬 蔡宁 王关志 张敏 江涵 刘畅 李光琛 尤栋 邵婷 王晋安 王 于 2021-06-10 设计创作，主要内容包括：本发明属于节能驱动技术领域,具体涉及一种基于MOSFET的电磁换向阀节能驱动电路,包括电源模块、占空比设置模块、信号给定模块、延时模块、MOSFET驱动模块、状态反馈模块、保护电路模块、PWM控制芯片UC2843B、控制器W77E58以及上位机。该驱动电路可以有效降低电磁换向阀的功率损耗,达到节能目的；采用W77E58控制器,极大地降低了电能消耗,提高了其与上位机之间的数据传输速度；采用UC2843B作为电路的PWM控制芯片,可以实现精准的占空比控制,并且有利于吸收高峰电流。(The invention belongs to the technical field of energy-saving driving, and particularly relates to an electromagnetic directional valve energy-saving driving circuit based on an MOSFET (metal-oxide-semiconductor field effect transistor), which comprises a power supply module, a duty ratio setting module, a signal giving module, a time delay module, an MOSFET driving module, a state feedback module, a protection circuit module, a PWM (pulse-width modulation) control chip UC2843B, a controller W77E58 and an upper computer. The driving circuit can effectively reduce the power loss of the electromagnetic directional valve and achieve the aim of energy conservation; the W77E58 controller is adopted, so that the power consumption is greatly reduced, and the data transmission speed between the controller and the upper computer is improved; adopt UC2843B as the PWM control chip of circuit, can realize accurate duty cycle control to be favorable to absorbing peak current.)

1. The energy-saving drive circuit of the electromagnetic directional valve based on the MOSFET is characterized by comprising the following components: the device comprises a power supply module, a duty ratio setting module, a signal setting module, a delay module, a MOSFET (metal-oxide-semiconductor field effect transistor) driving module, a state feedback module, a protection circuit module, a PWM (pulse-width modulation) control chip, a controller and an upper computer;

the energy-saving drive circuit of the electromagnetic directional valve has the functions that: the on-off control of the electromagnetic directional valve is realized by giving a controller signal through an upper computer; the electromagnet output power of the valve is controlled by the PWM control chip, so that the aim of saving energy is fulfilled;

the power supply module is used for rectifying and stabilizing the input alternating current into direct current meeting the requirements and transmitting the direct current to the PWM control chip and the valve electromagnet;

the duty ratio setting module is used for setting the output duty ratio of the PWM control chip;

the signal giving module is used for transmitting a switching instruction of the controller to the PWM control chip;

the time delay module is used for realizing time delay change duty ratio of the PWM control chip;

the MOSFET driving module is used for receiving a PWM output signal of the PWM control chip and changing effective voltage at two ends of the valve electromagnet;

the state feedback module is used for feeding back the on-off state of the electromagnet for the valve to the upper computer;

the protection circuit module is used for realizing the overcurrent protection function of the PWM control chip.

2. The MOSFET-based electromagnetic directional valve energy-saving driving circuit as claimed in claim 1, wherein the PWM control chip employs a UC2843B chip.

3. The MOSFET-based solenoid directional valve energy-saving driving circuit of claim 1, wherein the controller employs a W77E58 chip.

4. The MOSFET-based electromagnetic directional valve energy-saving driving circuit as claimed in claim 1, wherein the power module employs a KBP208G rectifier chip.

5. The MOSFET-based solenoid directional valve energy-saving driving circuit of claim 1, wherein the signal giving module employs a W77E58 controller.

6. The MOSFET-based electromagnetic directional valve energy-saving driving circuit as claimed in claim 1, wherein the MOSFET driving module employs a MOSFET switching device of SPA02N80C3 type.

7. The energy-saving drive circuit of the electromagnetic directional valve based on the MOSFET as claimed in claim 1, wherein the circuit gives a controller signal through an upper computer to realize on-off control of the electromagnetic directional valve.

8. The energy-saving drive circuit of the electromagnetic directional valve based on the MOSFET as recited in claim 1, wherein the circuit controls the output power of the valve electromagnet through the PWM control chip to achieve the purpose of energy saving.

9. The energy-saving drive circuit of the electromagnetic directional valve based on the MOSFET, as set forth in claim 1, is characterized in that the circuit is designed by adopting a W77E58 controller for control circuit, thereby greatly reducing power consumption and improving data transmission speed between the circuit and an upper computer.

10. The energy-saving driving circuit for the electromagnetic directional valve based on the MOSFET as recited in claim 1, wherein the circuit adopts UC2843B as the PWM control chip of the circuit, so that the accurate duty cycle control can be realized, and the peak current absorption is facilitated.

Technical Field

The invention belongs to the technical field of energy-saving driving, and particularly relates to an electromagnetic directional valve energy-saving driving circuit based on a Metal Oxide Semiconductor Field Effect Transistor (MOSFET).

Background

The electromagnetic directional valve has extremely wide application in a hydraulic system, and the reliable reversing of the electromagnetic directional valve is related to the flowing direction of a hydraulic oil way, so that the action execution of the hydraulic system is influenced. The electromagnetic directional valve realizes the functions of opening and closing the valve or reversing an oil way by changing the position of a valve core by using electromagnetic force. The electromagnetic directional valve driving circuit is mainly used for driving the electromagnetic directional valve, so that the electromagnetic directional valve completes on-off action according to a given signal, and normal operation of a hydraulic system is ensured.

In many large-scale hydraulic equipment, the solenoid directional valve often needs full load work for a long time, and this has just led to a large amount of electric energy losses, can reduce the life of electro-magnet in the solenoid directional valve moreover to a certain extent to influence the reliable operation of whole hydraulic system.

Disclosure of Invention

Technical problem to be solved

The technical problem to be solved by the invention is as follows: how to solve the problem of electric energy loss caused by long-time working of the electromagnetic directional valve.

(II) technical scheme

In order to solve the above technical problem, the present invention provides an energy-saving driving circuit for an electromagnetic directional valve based on a MOSFET, the energy-saving driving circuit for an electromagnetic directional valve comprising: the device comprises a power supply module, a duty ratio setting module, a signal setting module, a delay module, a MOSFET (metal-oxide-semiconductor field effect transistor) driving module, a state feedback module, a protection circuit module, a PWM (pulse-width modulation) control chip, a controller and an upper computer;

the energy-saving drive circuit of the electromagnetic directional valve has the functions that: the on-off control of the electromagnetic directional valve is realized by giving a controller signal through an upper computer; the electromagnet output power of the valve is controlled by the PWM control chip, so that the aim of saving energy is fulfilled;

the power supply module is used for rectifying and stabilizing the input alternating current into direct current meeting the requirements and transmitting the direct current to the PWM control chip and the valve electromagnet;

the duty ratio setting module is used for setting the output duty ratio of the PWM control chip;

the signal giving module is used for transmitting a switching instruction of the controller to the PWM control chip;

the time delay module is used for realizing time delay change duty ratio of the PWM control chip;

the MOSFET driving module is used for receiving a PWM output signal of the PWM control chip and changing effective voltage at two ends of the valve electromagnet;

the state feedback module is used for feeding back the on-off state of the electromagnet for the valve to the upper computer;

the protection circuit module is used for realizing the overcurrent protection function of the PWM control chip.

Wherein, the PWM control chip adopts a UC2843B chip.

Wherein, the controller adopts a W77E58 chip.

The power supply module adopts a KBP208G rectifier chip.

Wherein the signal giving module adopts a W77E58 controller.

The MOSFET driving module adopts an SPA02N80C3 type MOSFET switching device.

The circuit gives a controller signal through an upper computer to realize on-off control of the electromagnetic directional valve.

The circuit controls the output power of the valve electromagnet through the PWM control chip, and the purpose of energy conservation is achieved.

The circuit is designed by adopting a W77E58 controller, so that the power consumption is greatly reduced, and the data transmission speed between the circuit and an upper computer is improved.

The circuit adopts UC2843B as a PWM control chip of the circuit, can realize accurate duty ratio control, and is favorable for absorbing peak current.

(III) advantageous effects

The invention provides an energy-saving drive circuit of an electromagnetic directional valve based on a metal-oxide-semiconductor field effect transistor (MOSFET), aiming at reducing the electric energy loss of the electromagnetic directional valve and improving the operation reliability of a hydraulic system.

Compared with the prior art, the driving circuit can effectively reduce the power loss of the electromagnetic directional valve and achieve the purpose of energy conservation; the W77E58 controller is adopted, so that the power consumption is greatly reduced, and the data transmission speed between the controller and the upper computer is improved; adopt UC2843B as the PWM control chip of circuit, can realize accurate duty cycle control to be favorable to absorbing peak current.

Drawings

Fig. 1 is a structural block diagram of an energy-saving drive circuit of a magnetic exchange valve based on a MOSFET.

Fig. 2 is a delay circuit diagram.

Fig. 3 is a circuit diagram of the oscillation frequency setting and current feedback.

Fig. 4 is a signal given circuit diagram.

Detailed Description

In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

In order to solve the problems in the prior art, the invention provides an energy-saving driving circuit of an electromagnetic directional valve based on a MOSFET, as shown in fig. 1, the energy-saving driving circuit of the electromagnetic directional valve comprises: the power supply module, the duty ratio setting module, the signal giving module, the delay module, the MOSFET driving module, the state feedback module, the protection circuit module, the PWM control chip UC2843B, the controller W77E58 and the upper computer;

the energy-saving drive circuit of the electromagnetic directional valve has the functions that: the on-off control of the electromagnetic directional valve is realized by giving a controller signal through an upper computer; the electromagnet output power of the valve is controlled by the PWM control chip, so that the aim of saving energy is fulfilled;

the power supply module adopts a KBP208G rectifier chip and is used for rectifying and stabilizing input alternating current into direct current meeting requirements and transmitting the direct current to a PWM control chip UC28 2843B and a valve electromagnet;

the duty ratio setting module is used for setting the output duty ratio of the PWM control chip UC 2843B;

the signal giving module adopts a W77E58 controller and is used for transmitting a switching command of the controller to a PWM control chip UC 2843B;

the delay module is used for realizing the duty ratio change of the PWM control chip UC2843B in a delay way;

the MOSFET driving module adopts an SPA02N80C3 type MOSFET switching device and is used for receiving a PWM output signal of a PWM control chip UC2843B to change effective voltage at two ends of the valve electromagnet;

the state feedback module is used for feeding back the on-off state of the electromagnet for the valve to the upper computer;

the protection circuit module is used for realizing the overcurrent protection function of the PWM control chip UC 2843B.

The circuit adopts a W77E58 controller to carry out control circuit design, thereby greatly reducing power consumption and improving the data transmission speed between the circuit and an upper computer. The circuit adopts UC2843B as the PWM control chip of the circuit, can realize accurate duty cycle control, and is favorable for absorbing peak current.

Example 1

As shown in fig. 1, the present embodiment provides an energy-saving driving circuit for an electromagnetic directional valve based on a MOSFET, which includes a power module, a duty ratio setting module, a signal setting module, a delay module, a MOSFET driving module, a state feedback module, a protection circuit module, a PWM control chip UC2843B, a controller W77E58, and an upper computer.

The power supply module adopts a KBP208G rectifying chip to rectify and stabilize the input alternating current into direct current meeting the requirements and transmit the direct current to a PWM control chip UC28 2843B and a valve electromagnet.

The duty cycle setting module is used for setting the output duty cycle of the PWM control chip UC 2843B.

The signal setting module adopts a W77E58 controller to transmit a switching command to a PWM control chip.

The delay module realizes that the control chip delays to change the duty ratio.

The MOSFET driving module adopts SPA02N80C3 type MOSFET to receive PWM output signals of the PWM control chip, and changes of effective voltage at two ends of the valve electromagnet are achieved.

And the state feedback module feeds back the on-off state of the electromagnet for the valve to the upper computer.

The protection circuit module realizes the overcurrent protection function of the PWM control chip UC 2843B.

Referring to fig. 2, the time-delay circuit diagram shows that the valve electromagnet needs a larger magnetic force to attract when being opened, and the electromagnetic attraction force needed in the holding stage after the opening action is completed is greatly reduced. Therefore, the time delay circuit is designed, voltage signals are not input to the control chip for a short time after the system is powered on, starting voltages with large effective values are added to two sides of the electromagnet, and the time delay circuit outputs a voltage signal to the PWM control chip after the starting action is finished, so that the duty ratio of PWM output waveforms is changed, and the purpose of changing effective voltages at two ends of the electromagnet is achieved. When 5V voltage is added to the circuit, the C14 electrolytic capacitor is immediately charged, the voltage is added and maintained at the base of the triode V4, V4 is conducted, R24 and R25 are connected with GND, the base voltage of the triode V3 is divided by R25 and R26 in parallel, the voltage is small, V3 is not conducted, and the Vfb output voltage is zero. When the electrolytic capacitor C14 is charged, the paths formed by C14, R21 and the power supply are cut off, the base voltage of the triode V4 is zero, V4 is cut off, the paths formed by R24, R26 and the power supply are conducted at the moment, the base voltage of the triode V3 is R26 divided voltage, the base of V3 reaches the conducting voltage, V3 is conducted, and Vfb has voltage output. The loop formed by the resistors R20 and R21 and the diode VD9 can accelerate the discharge of the electrolytic capacitor.

Referring to fig. 3, the oscillating frequency setting and current feedback circuit diagram is shown, Ise is connected to the current feedback port of the driver chip, RCt is connected to the oscillating frequency setting port, and the S-terminal is connected to the source of the main loop MOSFET. R8, R9, C9 constitute an oscillation frequency setting circuit, and by setting these three parameters, the oscillation frequency of UC2843B can be freely changed.

Referring to the signal given circuit diagram of fig. 4, the system sends instructions to the PWM control chip through the controller. The master control singlechip inputs a voltage signal In to the circuit, the optoelectronic isolator TF1 is conducted, the +15V voltage and the R5 path are conducted, the base voltage of the triode V1 is added, the V1 is conducted, and Vcc outputs +15V direct-current voltage. The capacitors C5 and C6 play a role of filtering, and the light emitting diode VD4 is used for signal indication.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.