CN105553379A - Interface circuit of variable-frequency driving board and control board - Google Patents
Interface circuit of variable-frequency driving board and control board Download PDFInfo
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- CN105553379A CN105553379A CN201511016326.4A CN201511016326A CN105553379A CN 105553379 A CN105553379 A CN 105553379A CN 201511016326 A CN201511016326 A CN 201511016326A CN 105553379 A CN105553379 A CN 105553379A
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- resistance
- resistor
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- diode
- motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/045—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses an interface circuit of a variable-frequency driving board and a control board. The interface circuit is characterized by comprising a motor interface CON1 and a single chip computer, wherein a pin 1 of the motor interface CON1 is grounded, a pin 4 of the motor interface CON1 is connected with a 24V power supply, a pin 3 is in series connection with a resistor R4 and a ceramic capacitor CC1, a connection end of the resistor R4 and the ceramic capacitor CC1 is connected with a speed feedback interface of the single chip computer through a resistor R5, the two ends of the resistor R5 are in parallel connection with a ceramic capacitor CC2, a pin 2 of the motor interface CON1 is in series connection with a resistor R2 and a diode D1, the positive pole of the diode D1 is connected with a PWM port of the single chip computer, a resistor R1 is in parallel connected with the two ends of the diode D1, two leads at the front end of the resistor R2 are respectively connected with the positive pole of an electrolytic capacitor EC1 and one end of the resistor R3, and the negative pole of the ceramic capacitor CC1, the negative pole of the electrolytic capacitor EC1 and the other end of the resistor R3 are grounded in common.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to the interface circuit of a kind of frequency conversion drive plate and control board.
Background technology
Variable-frequency motor is typical electromechanical integrated product, and motor and supporting drive plate integrally will be produced, debug, and its performance just can be made to reach best.This feature determines motor and drive plate must make modular construction.Low power variable-frequency motor is that drive plate is built in motor internal mostly, and high-power frequency conversion motor adopts the mode of external drive plate to be main.Variable-frequency motor is actual is the system be made up of motor and supporting drive plate.This system is bought or is designed production by producer as a whole, during use after external input power and controling parameters, realizes the controls such as startup, stopping, speed governing, rotating.Just there is the interface problem of variable-frequency motor and external control part in this: the operating state being controlled variable-frequency motor during work by external circuit, and the information such as variable-frequency motor output speed are to external control part, and both cooperation, realize the function and usage that user needs.
The interface type of variable-frequency motor has multiple, and speed governing can be roughly divided into digital and analog: digital interface has I
2the forms such as C, UART, SPI, digital interface also can be directly used in information such as reading variable-frequency motor rotating speed.Analog interface has analog voltage and PWM to input two kinds of modes of speed regulation, and analog interface motor speed information generally exports in a pulsed fashion and understands for external circuit.Use potentiometer to realize speed governing in the confidential compatible practical application of variable-frequency electric on the market, current variable-frequency motor speed governing interface uses the many of simulation speed governing.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides the interface circuit of a kind of frequency conversion drive plate and control board.
The present invention is achieved by the following technical solutions:
The interface circuit of a kind of frequency conversion drive plate and control board, it is characterized in that: include motor interface CON1 and single-chip microcomputer, the 1 pin ground connection of described motor interface CON1, 4 pin connect 24V power supply, 3 pin are in series with resistance R4 and ceramic disc capacitor CC1, the link of resistance R4 and ceramic disc capacitor CC1 is connected the velocity feedback interface of described single-chip microcomputer through resistance R5, described resistance R5 two ends are parallel with ceramic disc capacitor CC2, 2 pin of described motor interface CON1 are in series with resistance R2 and diode D1, the positive pole of diode D1 connects the PWM mouth of single-chip microcomputer, resistance R1 is parallel with at the two ends of diode D1, two lead-in wires are had in the front end of resistance R2, connect the positive pole of electrochemical capacitor EC1 and one end of resistance R3 respectively, described ceramic disc capacitor CC1, the negative pole of electrochemical capacitor EC1 and the other end common ground of resistance R3.
The requirement that the speed governing interface voltage of variable-frequency motor is general is that motor is in halted state when 0.5-4.5V, below 0.5V, and being also defaulted as 4.5V during more than 4.5V no longer increases rotating speed.Voltage motor speed when 0.5V-4.5V at the uniform velocity rises with voltage rise.
When needs disable motor, Single Chip Microcomputer (SCM) PWM mouth output low level, crus secunda speed governing end one tunnel of motor interface CON1 through resistance R3 to ground, one tunnel through resistance R2, resistance R1 and Single Chip Microcomputer (SCM) PWM mouth to ground, ensure that electric machine speed regulation port voltage remains on close to zero volt, motor drive terminal obtains reliable stop signal.Single-chip microcomputer velocity feedback port monitors motor with or without anomalous rotation situation simultaneously, single-chip microcomputer output error information when having an exception.The resistance R4 of velocity feedback port is current limiting safeguard resistor, prevents outside high reject signal of crossing from causing single-chip microcomputer to damage by mouth line.Electric capacity CC1 is filter capacitor, for the High-frequency Interference superposed in filtering feedback speed signal, avoids occurring that speed is judged by accident.
When needs starter motor works, the pwm signal high level that single-chip microcomputer exports through diode D1, resistance R2 and resistance R3 dividing potential drop, then is added to the speed governing mouth of motor through electric capacity EC1 integral filtering.Between the low period of pwm signal, electric capacity EC1 is leaded up to resistance R3 and is discharged.Discharge over the ground through resistance R2, resistance R1 and Single Chip Microcomputer (SCM) PWM mouth in another road.Because the resistance of resistance R3 is larger, very little on EC1 discharge and recharge impact, voltage on electric capacity EC1 is mainly determined by PWM value, the in addition ratio of resistance R2 and resistance R1, use and just can obtain the linear corresponding magnitude of voltage with PWM value by the resistance of adjustment R2 and resistance R1 on electric capacity EC1, be easy to realize the continuous speeds control accurately of variable-frequency motor.When machine operation, single-chip microcomputer Negotiation speed feedback signal reads motor speed information in real time, revises and exports PWM value, realize fixed speed control.A kind of adjustment way that made the adding of diode D1, resistance R1 DC voltage value corresponding on PWM value and electric capacity EC1 many, both all the time can linear correspondence, effectively ensure that speed adjustable range and the precision of variable-frequency motor.
Advantage of the present invention is: single-chip microcomputer 0-255 level pwm signal can be converted into 0-4.5V voltage by the present invention, there is linear corresponding, the feature that adjustability is good of PWM value and analog voltage, easily can tackle the requirement of multistage, the accurate speed governing of motor, hardware cost is low, hardware circuit completes the filtering of input speed signal and the linear transformation of output pwm signal very well, simplifies software process.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is described in further detail:
The interface circuit of a kind of frequency conversion drive plate and control board, it is characterized in that: include motor interface CON1 and single-chip microcomputer, the 1 pin ground connection of described motor interface CON1, 4 pin connect 24V power supply, 3 pin are in series with resistance R4 and ceramic disc capacitor CC1, the link of resistance R4 and ceramic disc capacitor CC1 is connected the velocity feedback interface of described single-chip microcomputer through resistance R5, described resistance R5 two ends are parallel with ceramic disc capacitor CC2, 2 pin of described motor interface CON1 are in series with resistance R2 and diode D1, the positive pole of diode D1 connects the PWM mouth of single-chip microcomputer, resistance R1 is parallel with at the two ends of diode D1, two lead-in wires are had in the front end of resistance R2, connect the positive pole of electrochemical capacitor EC1 and one end of resistance R3 respectively, described ceramic disc capacitor CC1, the negative pole of electrochemical capacitor EC1 and the other end common ground of resistance R3.
Above-described embodiment is only preferably execution mode of the present invention, and in addition, the present invention can also have other implementations.It should be noted that, under the prerequisite not departing from the present invention's design, any apparent improvement and modification all should fall within protection scope of the present invention.
Claims (1)
1. the interface circuit of a frequency conversion drive plate and control board, it is characterized in that: include motor interface CON1 and single-chip microcomputer, the 1 pin ground connection of described motor interface CON1, 4 pin connect 24V power supply, 3 pin are in series with resistance R4 and ceramic disc capacitor CC1, the link of resistance R4 and ceramic disc capacitor CC1 is connected the velocity feedback interface of described single-chip microcomputer through resistance R5, described resistance R5 two ends are parallel with ceramic disc capacitor CC2, 2 pin of described motor interface CON1 are in series with resistance R2 and diode D1, the positive pole of diode D1 connects the PWM mouth of single-chip microcomputer, resistance R1 is parallel with at the two ends of diode D1, two lead-in wires are had in the front end of resistance R2, connect the positive pole of electrochemical capacitor EC1 and one end of resistance R3 respectively, described ceramic disc capacitor CC1, the negative pole of electrochemical capacitor EC1 and the other end common ground of resistance R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016326.4A CN105553379A (en) | 2015-12-29 | 2015-12-29 | Interface circuit of variable-frequency driving board and control board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016326.4A CN105553379A (en) | 2015-12-29 | 2015-12-29 | Interface circuit of variable-frequency driving board and control board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105553379A true CN105553379A (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511016326.4A Pending CN105553379A (en) | 2015-12-29 | 2015-12-29 | Interface circuit of variable-frequency driving board and control board |
Country Status (1)
| Country | Link |
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| CN (1) | CN105553379A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712464A (en) * | 2017-02-27 | 2017-05-24 | 华远电气股份有限公司 | Frequency converter digital signal input terminal and frequency converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203289377U (en) * | 2013-05-31 | 2013-11-13 | 合肥龙多电子科技有限公司 | Frequency-conversion driving board and control-board interface circuit |
| CN203504463U (en) * | 2013-06-24 | 2014-03-26 | 合肥龙多电子科技有限公司 | Brushless motor drive circuit |
-
2015
- 2015-12-29 CN CN201511016326.4A patent/CN105553379A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203289377U (en) * | 2013-05-31 | 2013-11-13 | 合肥龙多电子科技有限公司 | Frequency-conversion driving board and control-board interface circuit |
| CN203504463U (en) * | 2013-06-24 | 2014-03-26 | 合肥龙多电子科技有限公司 | Brushless motor drive circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712464A (en) * | 2017-02-27 | 2017-05-24 | 华远电气股份有限公司 | Frequency converter digital signal input terminal and frequency converter |
| CN106712464B (en) * | 2017-02-27 | 2023-05-23 | 华远电气股份有限公司 | Digital signal input terminal of frequency converter and frequency converter |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160504 |
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| RJ01 | Rejection of invention patent application after publication |