CN108809110A - A kind of power supply system of adjustable frequency - Google Patents

A kind of power supply system of adjustable frequency Download PDF

Info

Publication number
CN108809110A
CN108809110A CN201810605420.0A CN201810605420A CN108809110A CN 108809110 A CN108809110 A CN 108809110A CN 201810605420 A CN201810605420 A CN 201810605420A CN 108809110 A CN108809110 A CN 108809110A
Authority
CN
China
Prior art keywords
circuit
resistance
power supply
separately connected
triode
Prior art date
Application number
CN201810605420.0A
Other languages
Chinese (zh)
Inventor
崔超
Original Assignee
湖南图强科技开发有限公司
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 湖南图强科技开发有限公司 filed Critical 湖南图强科技开发有限公司
Priority to CN201810605420.0A priority Critical patent/CN108809110A/en
Publication of CN108809110A publication Critical patent/CN108809110A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The invention discloses a kind of power supply systems of adjustable frequency; including EMI filter circuit, controller, regulating circuit, protection circuit and driving circuit; the controller is separately connected power circuit, protection circuit and driving circuit; the power supply system of adjustable frequency of the present invention is powered using dual power supply technology; ensure the non-stop run performance of system; and keep output waveform undistorted using microcontroller pic16f917; various waveforms can be handled, such as rectangular wave PWM, sine wave SPWM, space phasor PWM, particular harmonic eliminate PWM, Hysteresis Current PWM;Protection circuit is additionally incorporated, is controlled using multiple triodes, when short circuit or overload, the D-S voltage across poles of metal-oxide-semiconductor VS rises, as A point voltage UA=UD(UD is metal-oxide-semiconductor D pole tensions), diode D4 conducting makes A point current potentials increase, overturn by the interlock circuit that VT2, VT3 are constituted, VT5 is made instantaneously to be connected, turned off VS, be allowed to be effectively protected, circuit structure is simple, at low cost.

Description

A kind of power supply system of adjustable frequency

Technical field

The present invention relates to a kind of power supply system, the power supply system of specifically a kind of adjustable frequency.

Background technology

It is well known that we used in mains frequency be 50Hz, still, in real life, it is sometimes desirable to power supply Frequency is not 50Hz.Electric railway is the direction of China railways development, and 25Hz power supplys are electrified sections signal systems Key equipment.It is the power supply of 400Hz in the power supply that aerospace field largely uses.It can be seen that in many occasions, It is not the 50Hz that alternating current is provided to need the frequency of power supply.As a result the generation of the power supply system of adjustable frequency is brought up.In reality The power supply system of adjustable frequency is widely used in the industries such as aviation, machinery, light industry in life.The First that is born in the world in 1969 Inverter is obtained since it is excellent and small, light-weight, low in energy consumption with control characteristic in electronics and electric field Rapid popularization and application.

Inverter developed to today from 1969, experienced the evolution of decades.Being permitted also occurs in its control mode It is more, can substantially it be divided into:Transformation and frequency control.What use was more at present is the pulse modulation technology i.e. PWM controls in transformation DC voltage is modulated into the ac output voltage of constant amplitude variable-width by technology that is, using the pulse width of control output voltage Pulse, controlling the virtual value of output voltage, controlling the distribution of harmonic wave of output voltage and inhibiting harmonic wave.PWM technologies can be rapid Ground controls output voltage, and its harmonics restraint is effectively performed, its dynamic response is good, all in output voltage quality, efficiency etc. Aspect has clear advantage.

According to the difference for forming PWM wave principle, can be divided into following several:Rectangular wave PWM, sine wave SPWM, space phase Measure PWM, particular harmonic eliminates PWM, Hysteresis Current PWM etc..This four classes PWM wave respectively has advantage and disadvantage, thus is suitable for different fields It closes.

In addition, much protection circuit can be used to MOS field effect transistor tube drive circuits, generally applied in the grid of metal-oxide-semiconductor Add an adjustable drive signal, the turn-on and turn-off time of metal-oxide-semiconductor is controlled by adjusting the duty ratio of drive signal, from And adjustable, controllable voltage is exported, but many existing MOS drive circuits all lack one and are effectively protected, especially It is short-circuit protection, and many engineers follow the line of least resistance now, all like being designed using dedicated protection chip, cost is higher.

Invention content

The purpose of the present invention is to provide a kind of power supply systems for the adjustable frequency that stability is high, to solve above-mentioned background skill The problem of being proposed in art.

To achieve the above object, the present invention provides the following technical solutions:

A kind of power supply system of adjustable frequency, including EMI filter circuit, controller, regulating circuit, protection circuit and driving electricity Road, the controller are separately connected power circuit, protection circuit and driving circuit, power circuit be also respectively connected with protection circuit and Driving circuit, driving circuit are also respectively connected with bridge inverter main circuit and filter circuit, and bridge inverter main circuit is also sequentially connected pressure regulation Circuit, current rectifying and wave filtering circuit and EMI filter circuit;The power circuit includes resistance R10, capacitance C1, rectifier bridge T and accumulator The capacitance C1 of E, resistance R10 are connected in parallel rear one end connection 220V alternating currents, and the other end connects the input terminal IN1 of rectifier bridge T, rectification The output end DC+ connection capacitances C2 of bridge T, the anode and output voltage VCC of accumulator E, the other end connection accumulator E of capacitance C2 Cathode, rectifier bridge T output end DC- and ground terminal, protection circuit include triode VT1, transformer T, resistance R1, diode D1 and the one end metal-oxide-semiconductor VS, the resistance R1 are separately connected power supply VCC, triode VT2 emitters, resistance R3, resistance R8 and three poles Pipe VT4 collectors, the resistance R1 other ends are separately connected resistance R2 and transformer T coil L1, transformer T coil L1 other ends difference Connect the resistance R2 other ends and triode VT1 collectors, triode VT1 emitters ground connection, triode VT1 base stages connection control letter Number Vi, the one end transformer T coil L2 are separately connected ground resistance R5, resistance R4 and triode VT3 base stages, triode VT3 transmittings Pole is separately connected ground resistance R6, the transformer T coil L2 other ends and diode D4 cathode, and diode D4 anodes are separately connected electricity The R8 other ends and diode D3 anodes are hindered, diode D3 cathode are separately connected output end vo and the poles D of metal-oxide-semiconductor VS, metal-oxide-semiconductor VS's The poles S are separately connected triode VT5 collectors and resistance R9 and are grounded, and the resistance R9 other ends are separately connected triode VT5 base stages, three Pole pipe VT4 base stages and resistance R7, triode VT4 emitters are separately connected triode VT5 emitters and the poles G of metal-oxide-semiconductor VS, resistance The R7 other ends are separately connected the resistance R4 other ends, diode D1 anodes and triode VT2 collectors, triode VT2 base stages difference The resistance R3 other ends and diode D2 anodes are connected, diode D2 cathode are separately connected triode VT3 collectors and diode D1 Cathode.

As a further solution of the present invention:The rated voltage of the accumulator E is 12V.

As a further solution of the present invention:The VCC is 12V DC electricity.

As a further solution of the present invention:The filter circuit uses single order Butterworth low pass wave.

As a further solution of the present invention:The controller uses microcontroller pic16f917.

As a further solution of the present invention:The control signal Vi comes from controller.

As further scheme of the invention:The power supply VCC comes from power circuit.

Compared with prior art, the beneficial effects of the invention are as follows:The power supply system of adjustable frequency of the present invention utilizes dual power supply Technology is powered, it is ensured that the non-stop run performance of system, and keep output waveform undistorted using microcontroller pic16f917, Various waveforms can be handled, as rectangular wave PWM, sine wave SPWM, space phasor PWM, particular harmonic eliminate PWM, Hysteresis Current PWM etc.;Protection circuit is additionally incorporated, is controlled using multiple triodes, when short circuit or overload, the poles D-S of metal-oxide-semiconductor VS Between voltage rise, as A point voltage UA=UD(UD is metal-oxide-semiconductor D pole tensions), diode D4 conducting makes A point current potentials increase, by The interlock circuit overturning that VT2, VT3 are constituted, makes VT5 instantaneously be connected, turns off VS, be allowed to be effectively protected, and circuit structure is simple, It is at low cost.

Description of the drawings

Fig. 1 is the schematic block circuit diagram of the power supply system of adjustable frequency.

Fig. 2 is the circuit diagram for protecting circuit.

Fig. 3 is the circuit diagram of power unit.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes.

Please refer to Fig.1 ~ 3, in the embodiment of the present invention, a kind of power supply system of adjustable frequency, including EMI filter circuit, control Device, regulating circuit, protection circuit and driving circuit processed, the controller are separately connected power circuit, protection circuit and driving electricity Road, power circuit is also respectively connected with protection circuit and driving circuit, driving circuit are also respectively connected with bridge inverter main circuit and filtering Circuit, bridge inverter main circuit are also sequentially connected regulating circuit, current rectifying and wave filtering circuit and EMI filter circuit.

Wherein, controller, protection circuit and driving circuit are all made of power unit power supply, and power unit is as shown in figure 3, city Electricity is powered by resistance-capacitance depressurization, bridge type rectification, capacitor filtering rear portion to accumulator E, and another part direct voltage output stores Battery E can complete stand-by power supply power supply.

Single phase alternating current power supply after EMI line filters, then after single-phase bridge rectification and big capacitor filter can direct current mother Steady dc voltage is obtained on line, the DC voltage is under the control on voltage tunable road, by bridge inverter main circuit inversion Afterwards, the exportable SPWM signals sent by driving circuit, after the single order Butterworth low pass wave by level-one low capacity, i.e., Ideal sinewave output voltage signal can be obtained in output end.

Control system based on microcontroller pic16f917 is mainly used to generate the driving letter of inverter circuit switching device Number, AT89S52 microcontrollers control ADC0809 by the sampling to DC bus-bar voltage, monitor in real time and show DC bus Voltage value makes whole system facilitate the operation of user.

The protection circuit includes triode VT1, transformer T, resistance R1, diode D1 and metal-oxide-semiconductor VS, the resistance R1 It is another that one end is separately connected power supply VCC, triode VT2 emitters, resistance R3, resistance R8 and triode VT4 collectors, resistance R1 End is separately connected resistance R2 and transformer T coil L1, and the transformer T coil L1 other ends are separately connected the resistance R2 other ends and three poles Pipe VT1 collectors, triode VT1 emitters ground connection, triode VT1 base stages connection control signal Vi, the one end transformer T coil L2 It is separately connected ground resistance R5, resistance R4 and triode VT3 base stages, triode VT3 emitters are separately connected ground resistance R6, become The depressor T coil L2 other ends and diode D4 cathode, diode D4 anodes are being separately connected the resistance R8 other ends and diode D3 just Pole, diode D3 cathode are separately connected output end vo and the poles D of metal-oxide-semiconductor VS, and the poles S of metal-oxide-semiconductor VS are separately connected triode VT5 collection Electrode and resistance R9 are simultaneously grounded, and the resistance R9 other ends are separately connected triode VT5 base stages, triode VT4 base stages and resistance R7, and three Pole pipe VT4 emitters are separately connected triode VT5 emitters and the poles G of metal-oxide-semiconductor VS, and the resistance R7 other ends are separately connected resistance R4 The other end, diode D1 anodes and triode VT2 collectors, triode VT2 base stages are separately connected the resistance R3 other ends and two poles Pipe D2 anodes, diode D2 cathode are separately connected triode VT3 collectors and diode D1 cathode.

When controlling signal Vi by low get higher, transistor VT1 is connected, and the voltage on pulse transformer T coils L1 is power supply The partial pressure value that VCC is obtained on resistance R1, R2, pulse transformer can be made very small, therefore will be saturated within a very short time, coupling It is a forward spike to close the voltage on its L2, which makes VT2 be connected, and VT2, VT3 form two-stage positive feedback interlocking Circuit, since interlocking effect VT2, VT3 will be held on, thus VT4 conductings make VS be connected, when control signal Vi is become by high level When low, pulse transformer T coil L1 magnetic restore, a negative sense sharp pulse is induced on L2, VT2 is made to end, to make VT3, VT4 ends, and VT5 is instantaneously connected, switch-off power VS.R8, D3, D4 constitute self-shield driving, the current potential of A points in circuit of the present invention It is obtained by resistance R4, R5 partial pressure, in normal work, the drain potential of VS is less than A point current potentials, thus diode D4 cut-offs, power supply VCC is through resistance R8, diode D3 to VS, and when short circuit or overload, the D-S voltage across poles of VS rises, as A point voltage UA=UD (UD is metal-oxide-semiconductor D pole tensions), diode D4 conducting makes A point current potentials increase, overturn, made by the interlock circuit that VT2, VT3 are constituted VT5 is instantaneously connected, and turns off VS, is allowed to be effectively protected.

It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (7)

1. a kind of power supply system of adjustable frequency, including EMI filter circuit, controller, regulating circuit, protection circuit and driving electricity Road, which is characterized in that the controller is separately connected power circuit, protection circuit and driving circuit, power circuit and also connects respectively It connects protection circuit and driving circuit, driving circuit is also respectively connected with bridge inverter main circuit and filter circuit, bridge inverter main circuit is also It is sequentially connected regulating circuit, current rectifying and wave filtering circuit and EMI filter circuit;The power circuit includes resistance R10, capacitance C1, whole Bridge T and accumulator E is flowed, the capacitance C1 of resistance R10 is connected in parallel rear one end connection 220V alternating currents, and the other end connects rectifier bridge T's The output end DC+ connection capacitances C2 of input terminal IN1, rectifier bridge T, the anode and output voltage VCC of accumulator E, capacitance C2's is another One end connects the output end DC- and ground terminal of the cathode of accumulator E, rectifier bridge T, and protection circuit includes triode VT1, transformer T, resistance R1, diode D1 and the one end metal-oxide-semiconductor VS, the resistance R1 are separately connected power supply VCC, triode VT2 emitters, resistance R3, resistance R8 and triode VT4 collectors, the resistance R1 other ends are separately connected resistance R2 and transformer T coil L1, transformer T The coil L1 other ends are separately connected the resistance R2 other ends and triode VT1 collectors, triode VT1 emitters ground connection, triode VT1 base stages connection control signal Vi, the one end transformer T coil L2 is separately connected ground resistance R5, resistance R4 and triode VT3 bases Pole, triode VT3 emitters are separately connected ground resistance R6, the transformer T coil L2 other ends and diode D4 cathode, diode D4 anodes are separately connected the resistance R8 other ends and diode D3 anodes, and diode D3 cathode are separately connected output end vo and metal-oxide-semiconductor The poles S of the poles D of VS, metal-oxide-semiconductor VS are separately connected triode VT5 collectors and resistance R9 and are grounded, and the resistance R9 other ends connect respectively Triode VT5 base stages, triode VT4 base stages and resistance R7 are met, triode VT4 emitters are separately connected triode VT5 emitters With the poles G of metal-oxide-semiconductor VS, the resistance R7 other ends are separately connected the resistance R4 other ends, diode D1 anodes and triode VT2 current collections Pole, triode VT2 base stages are separately connected the resistance R3 other ends and diode D2 anodes, and diode D2 cathode are separately connected triode VT3 collectors and diode D1 cathode.
2. the power supply system of adjustable frequency according to claim 1, which is characterized in that the rated voltage of the accumulator E For 12V.
3. the power supply system of adjustable frequency according to claim 1, which is characterized in that the VCC is 12V DC electricity.
4. the power supply system of adjustable frequency according to claim 1, which is characterized in that the filter circuit uses single order bar Special Butterworth low-pass filtering.
5. the power supply system of adjustable frequency according to claim 1, which is characterized in that the controller uses microcontroller pic16f917。
6. the power supply system of adjustable frequency according to claim 1, which is characterized in that the control signal Vi is from control Device.
7. the power supply system of adjustable frequency according to claim 1, which is characterized in that the power supply VCC is from power supply electricity Road.
CN201810605420.0A 2018-06-13 2018-06-13 A kind of power supply system of adjustable frequency CN108809110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810605420.0A CN108809110A (en) 2018-06-13 2018-06-13 A kind of power supply system of adjustable frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810605420.0A CN108809110A (en) 2018-06-13 2018-06-13 A kind of power supply system of adjustable frequency

Publications (1)

Publication Number Publication Date
CN108809110A true CN108809110A (en) 2018-11-13

Family

ID=64087076

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810605420.0A CN108809110A (en) 2018-06-13 2018-06-13 A kind of power supply system of adjustable frequency

Country Status (1)

Country Link
CN (1) CN108809110A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130121042A1 (en) * 2011-11-11 2013-05-16 Delta Electronics (Shanghai) Co., Ltd Cascaded h-bridge medium voltage drive, power cell and bypass module thereof
CN205610497U (en) * 2016-04-21 2016-09-28 象山杰尔德智能科技有限公司 Aperiodicity switching power supply controller
CN106341039A (en) * 2016-11-18 2017-01-18 广西大学 Control system for electronic inverter
CN107134932A (en) * 2017-07-07 2017-09-05 佛山领新信息科技有限公司 A kind of micro-wave oven variable-frequency power sources
CN107276424A (en) * 2017-07-07 2017-10-20 佛山领新信息科技有限公司 A kind of variable-frequency power sources control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130121042A1 (en) * 2011-11-11 2013-05-16 Delta Electronics (Shanghai) Co., Ltd Cascaded h-bridge medium voltage drive, power cell and bypass module thereof
CN205610497U (en) * 2016-04-21 2016-09-28 象山杰尔德智能科技有限公司 Aperiodicity switching power supply controller
CN106341039A (en) * 2016-11-18 2017-01-18 广西大学 Control system for electronic inverter
CN107134932A (en) * 2017-07-07 2017-09-05 佛山领新信息科技有限公司 A kind of micro-wave oven variable-frequency power sources
CN107276424A (en) * 2017-07-07 2017-10-20 佛山领新信息科技有限公司 A kind of variable-frequency power sources control system

Similar Documents

Publication Publication Date Title
CN103001526B (en) A kind of non-isolation type inverter and control method thereof
CN101954313B (en) High-frequency high-voltage switching power supply for electric precipitation
CN102611108B (en) Three-level three-phase four-wire active power filter and control method thereof
CN101783611A (en) Split induction three-level photovoltaic grid-connected inverter and control method thereof
CN204217167U (en) Single live wire touches lamp control switch
CN201656806U (en) Liquid phase pulse plasma power based on constant power charging system
CN101075783B (en) Three-phase medium-frequency DC high-voltage power supply for ESP
CN102163852A (en) Neutral point clamped non-isolated photovoltaic grid-connected inverter
CN102769289A (en) Three-phase unified power quality conditioner (UPQC) topological circuit based on modular multilevel converter (MMC) and pre-charging method of three-phase UPQC topological circuit
CN1779471A (en) Frequency-converter ageing tester
CN101651347B (en) Parallel-connection type active power filter
CN101860084B (en) Power supply source of high-voltage side measuring system
EP3098953A2 (en) Pre-charge circuit and photovoltaic inverter
CN103394412B (en) A kind of electric precipitation high-frequency impulse power power-supply
CN1858955A (en) Series-type voltage quality disturbing generating device
CN102201666B (en) Control circuit and use the electric machine of this control circuit
CN202475292U (en) Electrostatic-precipitation high-frequency power supply control system
JP6284081B2 (en) Inverter device
CN102195289A (en) Cascade-structure-based hybrid active power filter
CN103633839A (en) Improved Z-source boosting DC (direct current)-DC converter
CN103956927A (en) Voltage-active-clamping non-transformer-type single-phase photovoltaic inverter
Suan et al. Modeling, analysis and control of various types of transformerless grid connected PV inverters
CN103427681B (en) High-frequency high-voltage electrostatic dust removal power and control guard method thereof
CN102130623A (en) Improved main circuit structure of photovoltaic synchronization inverter
San et al. A new three-level six-switch topology for transformerless photovoltaic systems

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination