CN103166568A - Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit - Google Patents

Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit Download PDF

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Publication number
CN103166568A
CN103166568A CN 201110418197 CN201110418197A CN103166568A CN 103166568 A CN103166568 A CN 103166568A CN 201110418197 CN201110418197 CN 201110418197 CN 201110418197 A CN201110418197 A CN 201110418197A CN 103166568 A CN103166568 A CN 103166568A
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CN
China
Prior art keywords
circuit
pwm
variable frequency
frequency speed
speed regulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 201110418197
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Chinese (zh)
Inventor
张弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Guangrong Electric Co Ltd
Original Assignee
Xian Guangrong Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Guangrong Electric Co Ltd filed Critical Xian Guangrong Electric Co Ltd
Priority to CN 201110418197 priority Critical patent/CN103166568A/en
Publication of CN103166568A publication Critical patent/CN103166568A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit. In the field of electric drive, with the continuous improvement of the technological level of a self turn-off device, PWM technology increasingly matures as well, PWM AC variable frequency speed regulating has the advantages of being high in efficiency, high in power factor, good in output waveform, simple in structure and the like, and thus PWM AC variable frequency speed regulating is widely used in equipment such as an underground draught fan, a water pump and a paper machine. The PWM AC variable frequency speed regulating master control circuit comprises a rectification filter circuit, a three-phase inverter circuit and a singlechip. An AC power supply is connected with a three-phase asynchronous motor through the rectification filter circuit and the three-phase inverter circuit. A control loop of the rectification filter circuit sequentially passes through a detection circuit, a protective circuit, the singlechip, a sine PWM wave generator and a drive circuit and is output to the three-phase inverter circuit. The protective circuit is connected with the drive circuit. According to the PWM AC variable frequency speed regulating master control circuit, the singlechip is adopted, the circuit is simplified, arithmetic speed is fast, precision is high, a memory cell with large capacity is used, complex control can be achieved, zero drift does not exist, and control precision is high.

Description

PWM ac variable frequency speed regulation governor circuit
Technical field
The present invention relates to a kind of PWM ac variable frequency speed regulation governor circuit.
Background technology
In the electric drive field, along with improving constantly of self-turn-off device technical merit, pulse modulation technology (being called for short the PWM technology) also reaches its maturity, the PMW ac variable frequency speed regulation is widely used in the equipment such as Underground Fan, water pump, paper machine with its high efficiency, High Power Factor, good output waveform, advantages of simple structure and simple.
Summary of the invention
Technical problem solved by the invention is to provide a kind of PWM ac variable frequency speed regulation governor circuit.
For solving above-mentioned technical problem, the technical scheme that the present invention takes:
A kind of PWM ac variable frequency speed regulation governor circuit, its special character is: comprise current rectifying and wave filtering circuit, three-phase inverting circuit, single-chip microcomputer, AC power is connected with threephase asynchronous by current rectifying and wave filtering circuit, three-phase inverting circuit, and circuit, protective circuit, single-chip microcomputer, sinusoidal pulse width modulation wave producer, drive circuit output to three-phase inverting circuit to the control loop of current rectifying and wave filtering circuit after testing successively; Protective circuit is connected with drive circuit.
Above-mentioned single-chip microcomputer adopts the AT89C51 model.
Compared with prior art, the present invention adopts single-chip microcomputer to simplify circuit, fast operation, and precision is high, and jumbo memory cell is arranged, and can realize comparatively complicated control, the inferred-zero drift, control precision is high.
Description of drawings
Fig. 1 is circuit block diagram of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the present invention includes current rectifying and wave filtering circuit 4, three-phase inverting circuit 5, single-chip microcomputer 1, AC power is connected with threephase asynchronous by current rectifying and wave filtering circuit 4, three-phase inverting circuit 5, and circuit 3, protective circuit 2, single-chip microcomputer 1, sinusoidal pulse width modulation wave producer 7, drive circuit 6 output to three-phase inverting circuit 5 to the control loop of current rectifying and wave filtering circuit 4 after testing successively; Protective circuit 2 is connected with drive circuit 6.
Above-mentioned single-chip microcomputer 1 adopts the AT89C51 model.

Claims (2)

1. PWM ac variable frequency speed regulation governor circuit, it is characterized in that: comprise current rectifying and wave filtering circuit (4), three-phase inverting circuit (5), single-chip microcomputer (1), AC power is connected with threephase asynchronous by current rectifying and wave filtering circuit (4), three-phase inverting circuit (5), and circuit (3), protective circuit (2), single-chip microcomputer (1), sinusoidal pulse width modulation wave producer (7), drive circuit (6) output to three-phase inverting circuit (5) to the control loop of current rectifying and wave filtering circuit (4) after testing successively; Protective circuit (2) is connected with drive circuit (6).
2. a kind of PWM ac variable frequency speed regulation governor circuit according to claim 1, is characterized in that: described single-chip microcomputer (1) employing AT89C51 model.
CN 201110418197 2011-12-15 2011-12-15 Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit Pending CN103166568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110418197 CN103166568A (en) 2011-12-15 2011-12-15 Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110418197 CN103166568A (en) 2011-12-15 2011-12-15 Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit

Publications (1)

Publication Number Publication Date
CN103166568A true CN103166568A (en) 2013-06-19

Family

ID=48589350

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201110418197 Pending CN103166568A (en) 2011-12-15 2011-12-15 Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit

Country Status (1)

Country Link
CN (1) CN103166568A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696976A (en) * 2013-12-25 2014-04-02 苏州市职业大学 Control method applied to closed-loop speed regulation of FFU (fan filter unit) alternating-current fan
CN106958436A (en) * 2017-05-05 2017-07-18 北京易华录信息技术股份有限公司 Device for measuring Oil/gas Well and its working conditions of oil extractor parameter
CN109681457A (en) * 2019-02-26 2019-04-26 苏州洪昇新能源科技有限公司 A kind of AC blower fan one drags more managing and control systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696976A (en) * 2013-12-25 2014-04-02 苏州市职业大学 Control method applied to closed-loop speed regulation of FFU (fan filter unit) alternating-current fan
CN106958436A (en) * 2017-05-05 2017-07-18 北京易华录信息技术股份有限公司 Device for measuring Oil/gas Well and its working conditions of oil extractor parameter
CN109681457A (en) * 2019-02-26 2019-04-26 苏州洪昇新能源科技有限公司 A kind of AC blower fan one drags more managing and control systems

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Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130619

C05 Deemed withdrawal (patent law before 1993)