CN2160168Y - AC motor speed controller - Google Patents
AC motor speed controller Download PDFInfo
- Publication number
- CN2160168Y CN2160168Y CN 93205231 CN93205231U CN2160168Y CN 2160168 Y CN2160168 Y CN 2160168Y CN 93205231 CN93205231 CN 93205231 CN 93205231 U CN93205231 U CN 93205231U CN 2160168 Y CN2160168 Y CN 2160168Y
- Authority
- CN
- China
- Prior art keywords
- bridge
- effect transistor
- field effect
- alternating current
- phase
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a speed controller for an AC motor, which can control the speed, rotation number and rotation angle of the AC motor, and the utility model can also cause motor current to form a sinusoidal waveform. Thus, the utility model fundamentally overcomes the problems that output in a PWM inversion mode, the current is oscillated when the motor has light running with torque pulsation and 40Hz below, and strong noise and overheating which are caused by large quantity of higher harmonics. The bridge type inverting circuit of the controller only uses six electric-force field effect tubes MOSFET to form the six inverting switches of upper and lower bridge arms; one switch on the same bridge arm is turned off; another switch is automatically conducted simultaneously with the turning off in inverse direction, and is turned off after reaching 30 watt-hours to conducted with 150 watt-hours. The simple and reliable three-phase inverting circuit has very wide range, of frequency output, which reaches 3500 Hz above.
Description
The utility model relates to a kind of device that can control speed, revolution and the corner of multiple alternating current machine, especially the alternating current machine speed control that can accurately control the revolution and the corner of permanent magnetic Ac servo motor and stepping motor.
At present, known small-power speed regualtion of AC motor, it is the voltage type variable-frequency control that adopts pulse-width modulation, this frequency Varying and speed changing method is a noticeable in recent years new technology, but, because of this speed regulating method exists a large amount of high order harmonic components, problems such as rotor torque pulsation and current of electric vibration can't be solved at all, limited application in high-performance speed governing field.The circuit structure of the voltage frequency converter of above-mentioned use pulse modulation technology; form main circuit by diode converter, big capacitive filter, power transistor pulse width modulation inverter etc.; and use synchronously or the pulse-width modulation of asynchronous type or claim the three-phase PWM control circuit, with composition such as various protective circuits.The control principle of its output voltage is: the voltage magnitude of inverter output is constant, with changing the size that its time width is regulated average voltage, be that the PWM inverter is to carry out the repeatedly change of current in the half period of its output frequency, thereby obtain a plurality of square-wave pulses, control the size of average voltage with changing these pulse durations.
In the small-power ac variable frequency speed regulation, inverter is a core component, all is usually to make switch element and make continued flow component with 6 fast recovery diodes with 6 power transistors.The transistorized PWM inverter of electrification, general reference frequency output is all at 2.4-50Hz, or 8.8-180Hz or 18.2-350Hz, and the highest output frequency is no more than 400Hz, and its carrier frequency is about 3-5KHz.This PWM inverter, though be used for the frequency control of industrial frequency AC asynchronous motor at home and abroad in a large number,, in using, the speed governing of low-power machine still exists the some shortcomings part:
1, motor performance is descended significantly.Inverter PWM control mode, the high order harmonic component that except that first-harmonic, contains a lot of big amplitudes, cause motor noise big, various losses increase greatly, the temperature rise superelevation, the motor power output descends, and the spike of high order harmonic component is superimposed upon on the voltage waveform, can damage the power device of electrical machine insulation and inverter etc.
2, when the following motor light running of 40Hz, mostly be unstable.Motor with the PWM inverter power supply, pulse in its " rotation " magnetic field, cause the shaft torque pulsation, usually people are referred to as axle and shake, and this axle shakes and can cause the current of electric vibration, when motor operates in 40Hz when following with underload, will cause the current oscillation that fundamental frequency is 10-20Hz, in the time of particularly in motor operates in the 20-30Hz scope, this current oscillation is the most serious, even motor can not normally be moved when underload.Because existing variable-frequency governor exists above-mentioned variety of issue, therefore steadily and often be in numerous occasions of moving under the underload in the various requirement torque, when on plant equipment such as various lathes, using, just be difficult to satisfy the requirement of main frame to motor performance.
3, the cost of main circuit and control circuit is all higher, and the control circuit of this variable-frequency governor of controlling in the PWM mode generally realizes that with 16 or 32 microcomputers and multiple subsidy circuit the The whole control Circuits System is complicated, cost is high.Its main circuit also is to use components and parts such as the expensive power transistor of price, big capacity high electrolytic capacitor, fast recovery diode and quick insurance.This is to the low-power machine speed governing, concerning the small machine of the capacity below 1 kilowatt that needs speed governing operation in a large number, is very uneconomic particularly.
4, since the carrier frequency of inverter up to 5KHz about, concerning power transistor, its switching loss has been very big, adds that power transistor has secondary-breakdown phenomenon, and its range of safety operation is less, simultaneously, transistorized base current one deficiency just is operated in non-saturated region, and loss is increased severely, and causes element function forever to worsen, this just requires control circuit can supply with bigger base drive power, and this makes the cost of control circuit further improve again.The price height of power transistor, significantly derate is used, and adds that its range of safety operation is less, causes the overload capacity that is limiting motor of this variable-frequency governor strictness.
5, output frequency is lower, can't satisfy as various high speeds of the supporting usefulness of high speed internal grinding head, ultracentrifuge, high-speed bench drilling machine or the like and the requirement of ultrahigh speed motor to frequency of supply.
First purpose of the present utility model is that providing a kind of can carry out the alternating current machine speed control of rotational speed regulation and accurate control to 20 rev/mins to 180000 rev/mins various small-sized alternating current machine.
Second purpose is to provide a kind of and make the rotor torque not have pulsation and motor not to have the current of electric vibration when light running, and do not make the strict limited high-performance AC electric motor speed controller of motor overload ability.
The 3rd purpose be, provides a kind of inverter circuit and control circuit all simpler, and the low-cost alternating current machine speed control of making easily.
The utility model is achieved in that in having the metal shell of radiator; alternating current machine speed control main circuit is by three-phase piezo-resistance overvoltage protector; electric power field effect transistor converter; the electric power fet chopper; electric power field effect transistor inverter; small-sized capacitive filter is electrically connected; single-phase or three-phase alternating-current supply passes through the converter full-wave rectification; become the level pressure direct current after the filtering; its positive pole carries out the high frequency variable pulse width modulation of 20-60KHz again through the switching tube of chopper; again by minisize dc reactance device; become adjustable straightening stream after afterflow field effect transistor and the electrochemical capacitor filtering; the field effect transistor drain electrode of 3 N channel drain of half-bridge parallel connection will be gone up again in the inverter three-phase bridge circuit; be connected with adjustable straightening stream positive electrical; 3 N raceway grooves of following half-bridge electric power field effect transistor makes source electrode and connects adjustable straightening stream negative pole.In the three-phase bridge circuit of electric power field effect transistor inverter, last half-bridge is formed switch Q by 3 N raceway groove common drain electric power field effect transistor
1, Q
3, Q
5, following half-bridge is formed switch Q by 3 N raceway groove electric power field effect transistor
4, Q
6, Q
2The control of 6 inverse switches on the three-phase brachium pontis, be to clap positive 12V ± 2V square wave voltage signal by six phases 12 that control circuit provides, receive respectively on the grid of each field effect transistor, make it chronologically 1., 2., 3. → 2., 3. → 2., 3., 4. ... 6., 1. → 6., 1., 2. → 1., order 2., every a bat, promptly just there are an inverse switch conducting or an inverse switch to turn-off every 30 degree.Form inverse switch in every phase brachium pontis and all be when a switch is turned off on brachium pontis, make another switch nature reverse-conducting, through the program that is turned off of forward conduction 150 degree again behind 30 degree.
Inverse switch Q in the three-phase brachium pontis
1, Q
3, Q
5Or Q
4, Q
6, Q
2, every adjacent back one all will lag behind by above-mentioned triggering logic 4 claps, therefore, and output voltage mutual deviation 120 degree of three-phase brachium pontis.
6 switches on the three-phase brachium pontis, also available six six clap square wave voltage signal control mutually, its inverse switch conducting that adjacent back phase is just arranged simultaneously every 60 degree is turn-offed with preceding inverse switch mutually, last two bats that lag behind are mutually compared in back one, therefore, the output voltage of three-phase brachium pontis also is mutual deviation 120 degree, so just formed, each inverse switch on the brachium pontis all is the step mode that is turned off of forward conduction 120 degree again behind reverse-conducting 60 degree.The another kind of structure of electric power field effect transistor inverter circuit, be to make source electrode and connect the common source inverse switch circuit of direct-flow positive pole with 3 P raceway groove electric power field effect transistor, by the drain electrode of 3 pipes, make the three-phase brachium pontis export the forward square-wave voltage of 120 degree or 150 degree respectively.Making source electrode by 3 N raceway groove electric power field effect transistor again and connect the common source inverse switch circuit of dc power cathode, also is the drain electrode by 3 pipes, and the three-phase brachium pontis is exported respectively than positive voltage lag behind reverse 120 degree or the 150 degree square-wave voltages of 180 degree.
Because the P-channel field-effect transistor (PEFT) pipe is negative threshold values, when last half-bridge connects the common source switching circuit of direct-flow positive pole with 3 P-channel field-effect transistor (PEFT) pipes compositions, can use one three pipe shared, independent gates driving voltage than the low 7V-11V of source voltage drives 3 inverse switches of half-bridge, thereby has simplified the gate driver circuit of last half-bridge inverse switch.Especially in low-pressure system, when going up three switches of half-bridge with P raceway groove electric power field effect transistor composition, by being connected in the resistance between grid and the source electrode, the driving voltage that hangs down 7V-11V than source voltage is provided to grid, three switches of following half-bridge also are by being connected the resistance between grid and the source electrode, the gate drive voltage of positive 10V ± 2V is provided to grid, the grid of three switches of last half-bridge is connected with one three tunnel negative pulse actuator electrical respectively, the grid of three switches of following half-bridge is connected with one three tunnel positive pulse actuator electrical respectively, just, the negative pulse driver is all promoted by one six phase cycle pulse distributor, so main circuit and control circuit are all very simple.The converter of alternating current machine speed control main circuit, can use common PN junction diode to be connected into bridge rectifier and carry out full-wave rectification, but the PN junction diode is a minority carrier devices, and on state resistance is big, and the converter of being made up of the PN junction diode makes power-efficient have only 78%.Newly-designed electric power field effect transistor, it under reverse state a kind of rectifying device of majority carrier, the resume speed that is exceedingly fast is arranged, near almost synchronous with AC power degree, when making its reverse operation, electric current is the same with forward big, and it also has extremely low on state resistance, than the little 4-5 of the voltage drop of PN junction or Schottky rectifier doubly, power-efficient is increased to more than 87%, can significantly improves system effectiveness.Therefore the converter of alternating current machine speed control is formed the three-phase full-wave converter with the N raceway groove electric power field effect transistor of 6 grid source short circuits, or forms the single-phase full wave converter with the electric power field effect transistor of 4 grid source short circuits.
The switching speed of electric power field effect transistor is than the switching speed of power transistor more than high ten times, operating frequency is up to 100KHz, and make this switching device conducting or end, only need to add the voltage signal of 2-8V at grid, can realize control, it is not as power transistor, need supply with big electric current in base stage could work, so the control circuit of alternating current machine speed control is accomplished microminiaturized and integrated easily, and but the manufacturing process of electric power field effect transistor MOSFET is very simple, its manufacturing cost is low especially, and this makes the derate use significantly in speed control of electric power field effect transistor, perhaps uses the condition of having created for derate in parallel.The structure that its derate is used is: 1, significantly reduced the forward on state resistance, improved system effectiveness; 2, the radiator volume is dwindled, reduced the volume of speed control; 3, significantly improve the overload capacity of motor, overcome the strict limiting overload capability problems of existing variable-frequency governor; 4, improved the malignant fever circulation that causes because of overcurrent and made component failure.
Because field of electric force effect pipe has the performance of above-mentioned excellence, with the HF switch of making miniature chopper than the electric power field effect transistor (the highest 200KHz of using) of power transistor switching speed more than high ten times, and when making its reverse-conducting, can significantly improve the reliability and the efficient of system as the reactor continued flow tube.Low resistance minisize dc reactance device, use can be when magnetic flux significantly changes, and magnetic hysteresis loss is little, and saturation flux density is up to the modified model manganese-zinc ferrite core of 4500Gs.The switch of chopper is by the variable pulse width signal controlling of the PWM micro integrated circuit CA3524 output of control loop, and switching frequency is 20-60KHz.Low switch loss and low afterflow conduction loss, and the miniature reactor of newly-designed low-loss and low capacity filtering capacitor have been formed a pressure regulation efficient up to about 98% chopper.
In the electric motor speed controller, each drain electrode connects the N channel field-effect pipe of dc power anode, all be to use independently positive 10V ± 2V voltage to be added to fet gate and control conducting, and each independent current source negative pole is electrically connected with controlled electric power field effect transistor source electrode, float synchronously to realize control signal and source voltage.
First emigrant of bridge-type inverter, no matter that use the P raceway groove or use the N raceway groove, its down half-bridge all be to use N channel field-effect pipe, and make source ground.Therefore, three inverse switches of following half-bridge can use the independent current source of a public positive 10V ± 2V.
In the bridge inverter main circuit of speed control, 6 electric power fet switches, be to control by six phase cycle pulse distributors of 1 output, 150 degree or 120 degree square wave voltage signal, the low-voltage control signal of ring distributor, with voltage being electrically connected between the gate driver circuit that hundreds of volt scopes are floated, realize by the photoelectricity coupling.Adopt photoelectrical coupler to replace the drive circuit of pulse transformer, its remarkable advantage is that its duty ratio changes from 0.1-0.95, and output waveform is almost undistorted, and isolation performance is good again, and the little cost of this outer volume is low, and is shock-resistant.Because the output impedance of photoelectrical coupler is very low, and the internal resistance of interference source is generally very big, therefore has strong antijamming capability.
The formed current of electric ripple of 150 degree square-wave voltages of inverter three-phase brachium pontis output adds the formed current wave of motor afterflow 30 degree, just makes the first-harmonic of motor three-phase current form 180 sinusoidal waveforms of spending.Though the motor afterflow is carried out synchronously with shutoff, can not make the motor windings cutout and produce significantly harmful peak voltage, add that 150 degree supply power modes make inverter eliminate 6m ± 1 subharmonic substantially, but the every phase winding of motor all is distributed in the stator slot, when inverter every 30 degree or 60 degree when carrying out the change of current, can make current of electric that in a small amount dislocation is arranged on first-harmonic, be effective by eliminating this dislocation at the three-phase alternating current electric capacity of low capacity in parallel between motor and the inverter.Test of many times result has confirmed can make current of electric form the waveform of continuously level and smooth and very approaching sine wave at inverter three-phase output end low capacity three-phase alternating current in parallel capacitor.
Several model machines that adopt such scheme to develop, its waveform quality is very excellent, the power factor height, and fundamentally solved problems such as torque pulsation and current of electric vibration, when motor is moved under underloading or zero load, also highly stable.Because the reference frequency output of this electric motor speed controller is very wide, reach as high as 3500Hz, therefore can be used for the rotational speed regulation in high performance high speed and ultrahigh speed low-power machine field and accurately control, and circuit structure of the present utility model simple, make easily, cost is low.
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is main circuit structure of the present utility model and control circuit frame principle figure.
Fig. 2 is the alternating current machine speed control, the main circuit structure of second embodiment, and with 6 inverse switch tube grid drive circuits, and the control circuit functional-block diagram.
Among the figure 1, the given potentiometer 2 of frequency, acceleration and deceleration limit circuit 3, voltage control loop 4, pulse width modulator 5, photoelectrical coupler 6, gate drivers 7, Voltage-to-frequency Converter 8, six 12 clap ring distributors 9, No. 6 photoelectrical couplers 10,6 road square-wave voltage control signals 11,6 road gate drivers A, B, C, three-phase alternating current inlet wire D mutually
1To D
6The three-phase commutation bridge R that forms by the electric power field effect transistor of 6 grid source short circuits
Y1, R
Y2, R
Y3Be piezo-resistance C
1, electrolytic capacitor D
7, afterflow field effect transistor Q
7Chopping switch Q
7X. variable pulse width drive voltage signal L. direct current reactor C
2Electrolytic capacitor C
3, three-phase alternating current capacitor Q
1, Q
3, Q
5Last half-bridge inverse switch Q
4, Q
6, Q
2, following half-bridge inverse switch Q
1X, Q
3X, Q
5X, go up half-bridge logical drive voltage signal Q
4X, Q
6X, Q
2X, down half-bridge logical drive voltage signal IM, three phase alternating current motor 12, six six clap or six 12 clap ring distributor 13,3 tunnel negative pulse gate drivers (miniature normal component) 14,3 tunnel positive pulse gate drivers S mutually mutually
0, with motor revolution, the proportional given pulse signal Q of angle
P1, Q
P3, Q
P5, P raceway groove electric power field effect transistor inverse switch R
1To R
6, 6 inverse switches gate driving resistance.
In Fig. 1 main circuit three-phase inlet wire (A), (B), (C), connect three-phase alternating-current supply, with being connected in parallel on 3 piezo-resistance (R on the three-phase inlet wire
Y1), (R
Y2), (R
Y3) carry out overvoltage protection, three-phase inlet wire (A), (B), (C), receive respectively, by the electric power field effect transistor (D of 6 grid source short circuits
1) to (D
6) on the three-phase brachium pontis formed, by 3 electric power field effect transistor of last half-bridge (D
1), (D
2), (D
3) the three-phase alternating current positive half wave is sent into the positive pole of DC side, through electrolytic capacitor (C
1) after the filtering, by chopping switch (Q
7) carry out 20-60KHz variable pulse width chopper control, again through direct current reactor (L), afterflow field effect transistor (D
7) and electrochemical capacitor (C
2) filtering after, make the level pressure direct current become adjustable straightening stream, adjustable straightening stream positive pole is received 3 inverse switch (Q of half-bridge on the three-phase inverter bridge circuit
1), (Q
3), (Q
5), these 3 inverse switches are by the logical drive voltage signal (Q of last half-bridge
1X), (Q
3X), (Q
5X) according to six 12 logical orders of clapping ring distributors (8) mutually, clap (every bat is 30 degree) every four, make every adjacent back one to be conducted, clap every one again and make corresponding lastly turn-off mutually.Therefore, last half-bridge is by inverse switch (Q
1), give the power supply of three phase alternating current motor (IM) first phase winding, clap inverse switch (Q every one again
1) 150 degree of conducting, begin to turn-off, again every triple time inverse switch (Q
5) conducting, begin to power to the third phase winding.Like this, by 3 inverse switch (Q of last half-bridge
1), (Q
3), (Q
5), 120 degree that lag behind provide the positive half wave square-wave voltages of 150 degree to three phase windings of motor (IM) respectively.When the every phase brachium pontis of last half-bridge inverse switch turn-offs, all be by descending half-bridge to make the afterflow of three phase electric machine (IM) winding with the inverse switch reverse-conducting of arm.By the reactance and the afterflow of motor (IM) winding, making the electric current one that flows through every phase winding is the positive half wave that current of electric forms the near sinusoidal waveform, uses 3 N raceway groove electric power field effect transistor again, makes its source electrode compose in parallel down three inverse switch (Q of half-bridge
4), (Q
6), (Q
2), and pass through the logical drive voltage signal (Q of half-bridge down
4X), (Q
6X), (Q
2X) control, it is provided than the lag behind reverse 150 degree square-wave voltages of 180 degree of forward voltage to three phase windings of alternating current machine (IM) respectively.
Control circuit is by the given potentiometer of frequency (1) V/F of alternating current machine speed control to be carried out tracking control among Fig. 1, when the given potentiometer of frequency (1) output step signal, can be by acceleration and deceleration limit circuit (2), make it reach set-point by certain rate of change linearity, thereby restriction acceleration and deceleration electric current makes the unlikely generation overcurrent of motor.The velocity setting signal divides two-way after acceleration and deceleration limit circuit (2) restriction, one the tunnel receives Voltage-to-frequency Converter (7), another road connects voltage controller (3), according to delivering to pulse width modulator (4) again after motor (IM) the load characteristic adjustment voltage-mode, d. c. voltage signal is become pulse duration, make low pressure pulse-width signal and gate drivers (6) coupling that is located at high-pressure side by photoelectrical coupler (5), so that driver (6) is to chopping switch (Q
7) grid variable impulse width chopping voltage signal (Q than the high 10V of source electrode is provided
7X), make chopping switch (Q
7) duty ratio controlled, and then controlling direct voltage to inverter power supply.
Voltage-to-frequency Converter (7) becomes the voltage signal of given frequency and the proportional pulse signal of inverter frequency, again through six phase ring distributors (8) and No. 6 photoelectrical couplers (9), 6 road logical signals (10) are delivered to inverter 6 road gate drivers (11), by the logical drive voltage signal (Q of half-bridge on the inverter
1X), (Q
3X), (Q
5X) and the drive signal (Q of following half-bridge
4X), (Q
6X), (Q
2X), by the orders of six phases, 12 bats, to 6 inverse switch (Q in the inverter circuit
1), (Q
3), (Q
5), (Q
4), (Q
6) and (Q
2) carry out conducting and turn-off control, and then controlling the speed of alternating current machine (IM).
For current of electric is further improved, also between motor and inverter, be parallel with the three-phase alternating current capacitor (C of low capacity
3).
In another embodiment shown in Figure 2, main circuit is with 3 P raceway groove electric power field effect transistor inverse switch (Q
P1), (Q
P3), (Q
P5), make source electrode and connect direct-flow positive pole and form upward half-bridge, by three inverse switch (Q of last half-bridge
P1), (Q
P3), (Q
P5) drain electrode, make the three-phase brachium pontis respectively to the forward square-wave voltages of three phase alternating current motor (IM) output 150 degree or 120 degree.Use 3 N raceway groove electric power field effect transistor (Q again
4), (Q
6), (Q
2), make source electrode and connect dc power cathode and form half-bridge down, by the drain electrode of half-bridge three pipes down, make the three-phase brachium pontis respectively to reverse 150 degree or the 120 degree square-wave voltages of three phase alternating current motor (IM) output than forward voltage hysteresis 180 degree.
Three P raceway grooves of half-bridge inverse switch (Q on the control circuit
P1), (Q
P3), (Q
P5) and three N raceway grooves of following half-bridge inverse switch (Q
4), (Q
6), (Q
2) gate driving, be by being connected the divider resistance (R about 1K between grid and the source electrode entirely
1) to (R
6) realize.
With motor revolution, the proportional signal (S of corner
0) input six phases, six bats or 12 bat ring distributors (12), behind 6 road frequency divisions, will control three inverse switch (Q of half-bridge
P1), (Q
P3), (Q
P5) logic level signal, deliver to 3 tunnel negative pulse gate drivers (13), ［ (13) are miniature normal component ］ will control down half-bridge inverse switch (Q
4), (Q
6), (Q
2) logic level signal deliver to 3 tunnel positive pulse gate drivers (14), and with the 3 tunnel positive 10V square-wave voltages of being exported, by logical order respectively with inverse switch (Q
4), (Q
6), (Q
2) grid be electrically connected, and with 3 tunnel square-wave voltages of negative pulse gate drivers (13) output, respectively by logical order, with three inverse switch (Q of last half-bridge than the low 10V of dc power anode
P1), (Q
P3), (Q
P50 grid is electrically connected.
Thisly form the alternating current machine speed control of half-bridge by P raceway groove electric power field effect transistor, its main circuit and control circuit are all very simple, and highly reliable.
Claims (10)
1; a kind of alternating current machine speed control; in the metal shell of band radiator; main circuit is by overvoltage protector; converter; filter; inverter is electrically connected in proper order; in the motor continuous current circuit; 6 high-power fast resetters are in parallel with three-phase inverter; control circuit is by the given potentiometer of frequency; the acceleration and deceleration limit circuit; Voltage-to-frequency Converter; 6 frequency dividers of 180 degree conduction modes; the voltage mode control point adjustment; comparator; the PWM synthesis loop; and the base drive circuit of inverse switch pipe is formed; it is characterized in that in the bridge inverter main circuit structure; 6 high-power fast recovery continued flow components in parallel with switch element are not set; 6 inverse switches only forming upper and lower bridge arm by 6 electric power field effect transistor MOSFET; and clap ring distributor or the microprocessor carry out 12 frequency divisions by one six 12; with 150 degree conduction modes the grid of inverse switch element in the three-phase brachium pontis is controlled; when its 1 switch that is electrically connected mutually on brachium pontis is turned off; another switch nature reverse-conducting that is electrically connected with a phase winding in the motor, through behind 30 degree again forward conduction 150 degree be turned off.
2, alternating current machine speed control according to claim 1, it is characterized in that in the bridge-type inverter circuit structure, be by three P raceway groove electric power field effect transistor, make source electrode and connect direct-flow positive pole and form upward three inverse switches of half-bridge, drain electrode by three inverse switches of last half-bridge, be connected with motor three-phase winding electric respectively, link up the electric power field effect transistor by 3 N again, make source electrode and connect that dc power cathode is formed three inverse switches of half-bridge down, the drain electrode by three pipes is connected with motor three-phase winding electric respectively.
3, alternating current machine speed control according to claim 1, it is characterized in that in the bridge inverter main circuit structure, be by three N raceway groove electric power field effect transistor, make drain electrode and connect dc power anode and form the source electrode of going up three inverse switches of half-bridge, passing through three inverse switches of last half-bridge, the three-phase brachium pontis is connected with electrode three-phase winding electric respectively, by three raceway groove electric power field effect transistor, make source electrode and connect dc power cathode and form three inverse switches of half-bridge down again.
4, according to claim 1 and 2 described alternating current machine speed controls, it is characterized in that forming the common source switching circuit that connects direct-flow positive pole with the P-channel field-effect transistor (PEFT) pipe, 6 inverse switches of half-bridge and following half-bridge are to drive by the divider resistance that is connected between each grid and the source electrode on it.
5,, it is characterized in that converter is made up of the N raceway groove electric power field effect transistor of 4 or 6 grid source phase short circuits according to claim 1 and 2 described alternating current machine speed controls.
6,, it is characterized in that modulation switch pipe and miniature reactor continued flow tube, all the electrification field effect transistor of chopper according to claim 1,2 and 3 described alternating current machine speed controls.
7, according to claim 1 and 3 described alternating current machine speed controls, it is characterized in that making N channel field-effect pipe drain electrode to connect dc power anode, all be to use independently positive 10V ± 2V voltage to be added to fet gate and control conducting, and make each independent current source negative pole, be electrically connected with the source electrode of Be Controlled electric power field effect transistor, unsteady synchronously to realize with source voltage.
8, according to claim 1 and 2 described alternating current machine speed controls, it is characterized in that in the bridge inverter main circuit of speed control, 6 electric power field effect transistor inverse switches, be to export six of 120 degree square wave voltage signal by 1 six to clap cycle pulse distributor control mutually, the low-voltage control signal of ring distributor, with voltage being electrically connected between the gate driver circuit that hundreds of volt scopes are floated, realize by photoelectrical coupler.
9,, it is characterized in that the three-phase output end three-phase alternating current capacitor in parallel of bridge-type inverter according to claim 1 and 2 described alternating current machine speed controls.
10,, it is characterized in that each inverse switch in the three-phase inverter bridge circuit is directly composed in parallel by one group of field effect transistor MOSFET according to claim 1,2 and 3 described alternating current machine speed controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93205231 CN2160168Y (en) | 1993-03-10 | 1993-03-10 | AC motor speed controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93205231 CN2160168Y (en) | 1993-03-10 | 1993-03-10 | AC motor speed controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2160168Y true CN2160168Y (en) | 1994-03-30 |
Family
ID=33788545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93205231 Expired - Fee Related CN2160168Y (en) | 1993-03-10 | 1993-03-10 | AC motor speed controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2160168Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369376C (en) * | 2005-08-15 | 2008-02-13 | 珠海格力电器股份有限公司 | Three-phase asynchronous motor speed regulation controller and speed regulation method thereof, and air conditioner using controller |
| CN100376076C (en) * | 2004-11-19 | 2008-03-19 | 松下电器产业株式会社 | MOS type FET and motor driving device having same and motor thereof |
| CN100390002C (en) * | 2004-07-08 | 2008-05-28 | 三菱电机株式会社 | Electric power steering device |
| CN102655388A (en) * | 2012-05-17 | 2012-09-05 | 西北工业大学 | Method for driving brushless direct current motor in 150-degree conduction mode |
| CN106059337A (en) * | 2015-04-07 | 2016-10-26 | 意法半导体(图尔)公司 | Ac-dc converter with limitation of inrush current |
| CN108664053A (en) * | 2017-03-31 | 2018-10-16 | 北京天诚同创电气有限公司 | System and method for controlling IGBT module temperature |
-
1993
- 1993-03-10 CN CN 93205231 patent/CN2160168Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390002C (en) * | 2004-07-08 | 2008-05-28 | 三菱电机株式会社 | Electric power steering device |
| CN100376076C (en) * | 2004-11-19 | 2008-03-19 | 松下电器产业株式会社 | MOS type FET and motor driving device having same and motor thereof |
| CN100369376C (en) * | 2005-08-15 | 2008-02-13 | 珠海格力电器股份有限公司 | Three-phase asynchronous motor speed regulation controller and speed regulation method thereof, and air conditioner using controller |
| CN102655388A (en) * | 2012-05-17 | 2012-09-05 | 西北工业大学 | Method for driving brushless direct current motor in 150-degree conduction mode |
| CN102655388B (en) * | 2012-05-17 | 2014-11-12 | 西北工业大学 | Method for driving brushless direct current motor in 150-degree conduction mode |
| CN106059337A (en) * | 2015-04-07 | 2016-10-26 | 意法半导体(图尔)公司 | Ac-dc converter with limitation of inrush current |
| CN108664053A (en) * | 2017-03-31 | 2018-10-16 | 北京天诚同创电气有限公司 | System and method for controlling IGBT module temperature |
| CN108664053B (en) * | 2017-03-31 | 2020-06-16 | 北京天诚同创电气有限公司 | System and method for controlling temperature of insulated gate bipolar transistor module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101499771B (en) | Frequency-changing speed-regulating driver for energy feedback three phase motor with three phase electric power | |
| CN101635558B (en) | Inverter generator | |
| CN111628660B (en) | Compressor variable frequency speed regulating system and control method of direct current bus voltage | |
| KR101457569B1 (en) | Rectifier circuit and motor driving device using the same | |
| CN113659914A (en) | Drive circuit for high-speed switched reluctance motor and control method thereof | |
| Steigerwald et al. | Analysis of a novel forced-commutation starting scheme for a load-commutated synchronous motor drive | |
| CN110829906B (en) | Rapid braking control system and control method for three-phase switch reluctance motor | |
| CN101599649A (en) | The modulation system of SPWM inverter control signal in directly-driving wind power generation system and the system | |
| CN2160168Y (en) | AC motor speed controller | |
| CN107800350A (en) | Speed-adjusting circuit of alternating and air conditioner | |
| CN111628659A (en) | Compressor variable frequency speed regulating system and control method of direct current bus voltage | |
| CN206432928U (en) | A kind of single-phase motor variable frequency drive | |
| CN213125885U (en) | Integrated drive circuit for alternating current power control and stepless speed regulation control circuit | |
| CN211981785U (en) | Direct-current brushless motor driving system for cook machine and direct-current brushless motor | |
| CN1035462C (en) | Governor with DC motor for AC power supply | |
| CN113965139A (en) | Thyristor and IGBT mixed three-phase motor two-phase frequency conversion control circuit and method thereof | |
| CN216390847U (en) | Thyristor and IGBT mixed three-phase motor two-phase frequency conversion control circuit | |
| Waghare et al. | PWM controlled high power factor single phase Fan regulator | |
| CN205377737U (en) | Frequency converter structure and corresponding motor system | |
| CN112087180B (en) | Integrated driving circuit for alternating current power control and stepless speed regulation control circuit | |
| CN214591224U (en) | Drive circuit and drive device | |
| Nan et al. | Discussion of the Importance of IGBT in Variable-Frequency Drive | |
| CN221103205U (en) | Driving circuit for low back electromotive force compressor and air conditioning system | |
| US6933705B1 (en) | Generator stator voltage control through DC chopper | |
| CN1056965A (en) | Three-phase field-controlled bridge-type dc-to-ac converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |