阅读说明：本技术 可自动识别pwm信号和lin通讯信号的直流电机无级调速控制器 (DC motor stepless speed regulation controller capable of automatically identifying PWM signal and LIN communication signal ) 是由 童明辉 于 2020-06-11 设计创作，主要内容包括：本发明涉及一种可自动识别PWM信号和LIN通讯信号的直流电机无级调速控制器,包括控制电路板,所述控制电路板上的电路包括电源和信号端口、信号识别和处理单元、ECU处理单元、运行监测单元、指示灯单元、数字功率驱动单元,所述的电源和信号端口用于连接电源和信号源,并连接信号识别和处理单元,信号识别和处理单元连接信号源和ECU处理单元,ECU处理单元还连接数字功率驱动单元和运行监控和保护单元,运行监控和保护单元与数字功率驱动单元连接,还连接指示灯单元。本发明连线极少,易于组装和维护,模组搭配灵活,应用范围广。(The invention relates to a DC motor stepless speed regulation controller capable of automatically identifying PWM signals and LIN communication signals, which comprises a control circuit board, wherein a circuit on the control circuit board comprises a power supply and signal port, a signal identification and processing unit, an ECU processing unit, an operation monitoring unit, an indicator lamp unit and a digital power driving unit, wherein the power supply and signal port is used for being connected with a power supply and a signal source and is connected with the signal identification and processing unit, the signal identification and processing unit is connected with the signal source and the ECU processing unit, the ECU processing unit is also connected with the digital power driving unit and an operation monitoring and protecting unit, and the operation monitoring and protecting unit is connected with the digital power driving unit and is also connected with the indicator lamp unit. The invention has few connecting lines, easy assembly and maintenance, flexible module matching and wide application range.)

1. But stepless speed regulation controller of direct current motor of automatic identification PWM signal and LIN communication signal, its characterized in that: the intelligent control system comprises a control circuit board, the last circuit of control circuit board includes power and signal port, signal identification and processing unit, ECU processing unit, operation monitoring unit, pilot lamp unit, digital power drive unit, power and signal port be used for connecting power and signal source to signal identification and processing unit, signal identification and processing unit connect signal source and ECU processing unit, digital power drive unit and operation control and protection unit are still connected to ECU processing unit, operation control and protection unit are connected with digital power drive unit, still connect the pilot lamp unit.

2. The dc motor stepless speed regulation controller capable of automatically identifying the PWM signal and the LIN communication signal according to claim 1, wherein: the signal identification and processing unit comprises an LIN communication module, a channel selection control circuit and a PWM signal level matching circuit, the channel selection control circuit comprises a toggle switch, one signal input end of the toggle switch is connected with a signal port, two signal output ends of the toggle switch are respectively an LIN communication end and a PWM communication end, the LIN communication end is connected with a processor in the ECU processing unit through the LIN communication module, and the PWM communication end is connected with the processor in the ECU through the PWM signal level matching circuit.

3. The dc motor stepless speed regulation controller capable of automatically identifying the PWM signal and the LIN communication signal according to claim 1, wherein: the ECU processing unit comprises an ARM core single chip microcomputer STM8S003F3P3TR, and a serial port pin and a timer pin of the single chip microcomputer are connected to the signal identification and processing unit and are respectively connected with an LIN communication end and a PWM communication end.

4. The dc motor stepless speed regulation controller capable of automatically identifying the PWM signal and the LIN communication signal according to claim 1, wherein: the operation monitoring unit comprises a safety piece directly connected in series with the input end of the power supply and an operation parameter acquisition and fault protection circuit, and the operation parameter acquisition and fault protection circuit is connected with the controlled motor and the singlechip; and comparing the running current value of the controlled motor with a preset value by the program in the singlechip, and cutting off a driving signal of a later stage if the running current value exceeds the preset value.

5. The dc motor stepless speed regulation controller capable of automatically identifying the PWM signal and the LIN communication signal according to claim 1, wherein: the indicator light unit comprises three LEDs which are respectively connected with and indicate power supply, operation and communication activities.

6. The dc motor stepless speed regulation controller capable of automatically identifying the PWM signal and the LIN communication signal according to claim 1, wherein: the digital power driving unit comprises a group of Darlington amplifying circuits and is connected with a timer pin of the singlechip.

7. The dc motor stepless speed regulation controller capable of automatically identifying the PWM signal and the LIN communication signal according to claim 1, wherein: the control circuit board is arranged in the n-shaped shell, the shell is formed by processing a section of a die-casting aluminum profile, and comprises radiating fins arranged at the top and a mounting plate arranged at the bottom, and fixing holes are formed in the mounting plate.

Technical Field

The invention relates to the technical field of direct current motor controllers, in particular to an automatic signal identification and operation data interaction structure.

Background

The speed regulation of the current direct current motor has three modes: resistance wire voltage-dividing, voltage-reducing and speed-regulating, motor series-parallel speed-regulating and PWM speed-regulating.

The resistance wire voltage-dividing voltage-reducing speed-regulating method adopts a high-power winding resistor corresponding to the motor, and realizes the regulation of the power supply of the motor by serially connecting resistance wires with different resistance values in a power supply loop of the motor, thereby achieving the purpose of voltage-reducing speed-regulating. Because the extra high-power resistance wire is connected, the ineffective waste of energy consumption can be inevitably caused, and because the resistance wire can produce a large amount of heat during working, fire and faults are easily caused.

The motor series-parallel connection speed regulation method adopts a plurality of motor coil windings to realize the series connection and the parallel connection of the motors in the same system to the power supply through the switching of an external switch or a relay, solves the problem of energy consumption waste caused by resistance wire voltage division, but can only realize simple 2-3 gear adjustment and has a small speed regulation range. And because the power supply is connected in a hard mode, the current impact is large, and the external wiring is complex. If a motor of the system fails, the whole motor system can not work.

The PWM speed regulation method is a direct current motor speed regulation method widely adopted at present, adopts a speed regulation mode of driving a switching power supply by pulse width, has the advantages of simple hardware structure, high speed regulation precision and wide range, and can realize stepless regulation in a range of 0-100% theoretically. The motor inverter has the disadvantages that only one-way control can be realized, and because only input PWM signals can be received and amplified, the chopping frequency cannot be adjusted according to the characteristic difference of the motor, the matching of the motor is not very accurate, and the motor is easy to generate heat or the noise of the motor beat frequency and squeal is easy to cause.

No matter which mode is adopted, the motor receives the analog voltage signal, the signal is transmitted in a single direction, after the command is sent out, the motor executes or not, the module runs normally or not, and the master control party sending out the command can not know and manage.

Disclosure of Invention

The invention aims to improve and innovate the defects and problems in the prior art, and provides a DC motor stepless speed regulation controller which has a common PWM and LIN communication interface, automatically switches and can monitor the running state of a motor.

The technical scheme is that the DC motor stepless speed regulation controller capable of automatically identifying PWM signals and LIN communication signals is constructed, and the DC motor stepless speed regulation controller comprises a control circuit board, wherein a circuit on the control circuit board comprises a power supply and signal port, a signal identification and processing unit, an ECU processing unit, an operation monitoring unit, an indicator lamp unit and a digital power driving unit, the power supply and signal port is used for being connected with a power supply and a signal source and is connected with the signal identification and processing unit, the signal identification and processing unit is connected with the signal source and the ECU processing unit, the ECU processing unit is also connected with the digital power driving unit and an operation monitoring and protecting unit, and the operation monitoring and protecting unit is connected with the digital power driving unit and is also connected with the indicator lamp unit.

The signal identification and processing unit comprises an LIN communication module, a channel selection control circuit and a PWM signal level matching circuit, the channel selection control circuit comprises a toggle switch, one signal input end of the toggle switch is connected with a signal port, two signal output ends of the toggle switch are respectively an LIN communication end and a PWM communication end, the LIN communication end is connected with a processor in the ECU processing unit through the LIN communication module, and the PWM communication end is connected with the processor in the ECU through the PWM signal level matching circuit.

The ECU processing unit comprises an ARM core single chip microcomputer STM8S003F3P3TR, and a serial port pin and a timer pin of the single chip microcomputer are connected to the signal identification and processing unit and are respectively connected with an LIN communication end and a PWM communication end.

The operation monitoring unit comprises a safety piece directly connected in series with the input end of the power supply and an operation parameter acquisition and fault protection circuit, and the operation parameter acquisition and fault protection circuit is connected with the controlled motor and the singlechip; and comparing the running current value of the controlled motor with a preset value by the program in the singlechip, and cutting off a driving signal of a later stage if the running current value exceeds the preset value.

The indicator light unit comprises three LEDs which are respectively connected with and indicate power supply, operation and communication activities.

The digital power driving unit comprises a group of Darlington amplifying circuits and is connected with a timer pin of the singlechip.

The control circuit board is arranged in the n-shaped shell, the shell is formed by processing a section of a die-casting aluminum profile, and comprises radiating fins arranged at the top and a mounting plate arranged at the bottom, and fixing holes are formed in the mounting plate.

The invention has the advantages and beneficial effects that: the signal identification and processing unit can automatically identify whether LIN communication signals or PWM signals are input by the signal port, and the signals are accessed into the corresponding ECU port for processing, and the digital control and real-time running state data acquisition and analysis of the motor power output circuit are realized through the singlechip by combining the PWM speed regulation mode and the intelligent bus circuit, and the digital interaction is realized through the intelligent bus and the motor control mode, so that the bidirectional control of the motor is realized. The following advantages are also provided:

1. the automatic identification function of the control signal is provided, and the automatic identification device can be compatible with new and old electric control systems;

2. the motor has a data bidirectional interaction function, and can realize intelligent management of the motor;

3. the energy is saved, the environment is protected, the precision control is realized, and the electric energy conversion efficiency is high;

4. few connecting lines, easy assembly and maintenance, flexible module matching and wide application range.

Drawings

Fig. 1 is a schematic structural diagram of the embodiment.

Fig. 2 is a sectional view of the embodiment.

Fig. 3 is a schematic structural diagram of the control circuit board of the embodiment.

Fig. 4 is a circuit diagram of a LIN communication processing unit.

Fig. 5 is a diagram of an input signal dial selection circuit.

Fig. 6 is a PWM signal level matching circuit diagram.

Fig. 7 is a schematic diagram of the connection of the dip switch.

Fig. 8 is a schematic structural diagram of the single chip microcomputer.

Fig. 9 is a schematic diagram of a hard protection circuit.

Fig. 10 is a soft protection circuit diagram.

Fig. 11 is a circuit diagram of an operation and communication indicator light.

Fig. 12 is a circuit diagram of a PWM digital drive unit.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed" on another element, it can be directly disposed or attached to the other element or intervening elements may also be present. The terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.