CN2121771U - Starting energy-saving device for AC asynchronous motor - Google Patents
Starting energy-saving device for AC asynchronous motor Download PDFInfo
- Publication number
- CN2121771U CN2121771U CN 91230041 CN91230041U CN2121771U CN 2121771 U CN2121771 U CN 2121771U CN 91230041 CN91230041 CN 91230041 CN 91230041 U CN91230041 U CN 91230041U CN 2121771 U CN2121771 U CN 2121771U
- Authority
- CN
- China
- Prior art keywords
- current
- circuit
- voltage
- starting
- energy
- 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.)
- Granted
Links
- 230000033228 biological regulation Effects 0.000 claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 239000010703 silicon Substances 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000004134 energy conservation Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000010363 phase shift Effects 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 3
- 230000003412 degenerative effect Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000007858 starting material Substances 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000000737 periodic effect Effects 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses an AC asynchronous motor starts energy-saving appliance. The double closed-loop control system composed of a current regulator and a voltage regulator is used for controlling a trigger angle of a controllable silicon to regulate and limit current. The current loop is provided with constant and ramp current settings. The voltage loop is controlled by a phase angle automatic detection circuit and a heavy load signal circuit. The device has the advantages that the anti-shake circuit and the novel trigger are arranged, the current can be limited to be within 1.5-3.5 times of rated current, the steady starting without vibration impact can be realized, the automatic voltage regulation and energy saving can be realized under the condition of light and empty load, the test shows that the device has excellent starting and running performance and obvious electricity saving effect, and the device is the updating and upgrading equipment of the existing starter of medium and large motors.
Description
The utility model discloses a kind of AC asynchronous motor starting energy-saving appliance, realizes current limit starting, voltage stabilizing work and the pressure regulating energy-saving when sky, underloading of AC asynchronous motor.
In the prior art, starting current for the restriction asynchronous motor, general starter such as Y-△ starter, the Autocompensation device etc. that adopt Electromagnetic Control, they all have shortcoming, the power consumption of equipment own is big, make and break contact burns out easily, exist the secondary changing-over impact, do not allow continuous Fraquent start, generally can not pressure regulating energy-saving etc.Also occurred some electronic controllers in recent years, disclose a kind of Energy Saving Control as number of patent application 892024909.Its purpose is to make the contactless reduced voltage starting of asynchronous motor, pressure regulating energy-saving, adopt starting amplifier output ramp velocity to change, voltage is progressively risen, its weak point is that starting current can not effectively be limited (general all at 3～5 times more than the rated current), and all produce shake in various degree inevitably at the beginning of starting, even rise and dash counter-rotating, this life-span to electromechanical equipment all has a significant impact.In addition, in the system that does not have the voltage negative feedback sort, when the dark pressure regulation of bringing onto load, the fluctuation of electric current, voltage and impact are big, poor stability.
The purpose of this utility model is: is to avoid above-mentioned deficiency of the prior art, and provides a kind of starting and pressure regulation runnability good, and empty, underloading automatic Regulation energy-saving effect is remarkable, the general AC asynchronous motor starting energy-saving appliance that functional reliability is high.
The purpose of this utility model reaches by following measure: form double closed-loop control system with voltage regulator and current regulator, control silicon controlled trigger angle.Utilize electric current loop to carry out current limit starting, current regulator has constant current and slope current given, so that perseverance is changeed torch and load of the pumps, can set up the preferable starting current curve of different requirements.Make starting current little and reliable rapidly.The stability of electric current, voltage when utilizing Voltage loop to improve pressure regulation and operation, the rush of current when deboost changes, and accelerate transient process.Stability when particularly improving the bringing onto load depth pressure regulating.Automatically detect by the phase angle, obtain a phase angle feedback voltage, control voltage regulator automatic Regulation is energy-conservation.When the impact heavy load, utilize heavy load signal or external control position signalling to boost rapidly, and periodically also can directly utilize heavy load signal automatic Regulation energy-conservation during heavy load.During starting, utilize the anti-twitter circuit of starting, make motor no matter much at starting current, can both smooth start and do not produce shake.General, reliable trigger, phase shift range is big, the linearity good, power consumption is little, antijamming capability is strong, makes controllable silicon reliably working on request.
Introduce the utility model accompanying drawing below: this accompanying drawing also is preferred embodiment of the utility model figure.
Fig. 1: the theory diagram that is native system.
Fig. 2: be the control circuit figure of Voltage loop and electric current loop.
Fig. 3: be the starting current oscillogram.(A) be the constant current starting; (B) be the slope current starting.
Fig. 4: anti-shake from delay control circuit figure for starting.
Fig. 5: be the heavy load signal circuit diagram.
Fig. 6: be the automatic testing circuit figure of phase angle.
Fig. 7: be main some oscillogram of the automatic testing circuit work of phase angle.
Fig. 8: be a phase flip-flop circuit figure.
Fig. 9: be main some oscillogram of flip-flop operation.
Below in conjunction with accompanying drawing embodiment is described in further detail:
Fig. 1 is an ac three-phase asynchronous motor 16, and by antiparallel controllable silicon 17, current transformer 18 joins with three phase mains, and 19 is the power supply synchrotrans, and 20 is the electric moter voltage feedback transformer, and 1 is trigger, three-phase voltage current signal V
U, V
IDetect by 19,18 respectively, through shaping circuit 13,14 shapings, phase-angle detection 12 conversion output phase-angle detection result, a just circuitry phase of more than drawing.The phase-angle detection result of comprehensive through active filter 11 again, filtering three-phase gained, output phase angle feedback V
F φV
F φV with voltage given 7
8V, Voltage Feedback 8 V
FV, and the V that obtains through current detecting 21, heavy load signal circuit 9
L8, carry out comprehensive adjustment at voltage regulator 6,6 output is the given V of constant current of current regulator 2
SIThe current regulator comprehensive adjustment is by 21 current feedback V
FI, slope current given circuit 4 V
8L, and V
SI, output control voltage V
CT, control trigger phased angle α, make controllable silicon carry out current limit starting and automatic Regulation energy-conservation.The phase angle feedback V that uses of pressure regulation wherein
F φ, control 6 with load variations, make to regulate to change output voltage.When heavy load dashes forward, utilize 9 boost signal to make motor be raised to total head immediately, the periodic shock load for great machinery inertia is arranged can utilize the external control position signalling, make the motor load that afterwards withstands shocks of boosting earlier, the carrying load ability when improving the motor pressure regulation.Load factor changed little periodicity operating mode when the heavy load signal circuit also can be to heavy load, carried out two point voltages switch operating back and forth, with pressure regulating energy-saving.During the system failure, electronic protector 22 blocks trigger, cuts off main circuit.
The voltage and current double closed-loop control circuit of Fig. 2 is made of amplifier, diode, capacitance-resistance.Voltage regulator A during starting
53Comprehensive V
SV, V
FV, V
F φ, V
LSInput makes output reach saturation limiting, potentiometer P
42Value be current regulator A
41The given V of electric current
SI, it and the starting current feedback signal V that takes from current detecting 21
FICompare, through Current Regulation, output V
CtThe phased angle α of control trigger, make motor keep given V
SIValue is started with constant current.For blower fan, pump machines, load torque is the increase that raises and to form square with rotating speed, when therefore opening the sluices starting, may cannot get up and slowly runs for a long time, perhaps wants given very big starting current.Increase if starting current is the slope, then can obtain preferable starting state, promptly guaranteeing has minimum starting current under the rapidly reliable starting conditions, and the loss of electric current is also little.A
43Be ramp generator, it is an integrator that the forward and reverse charging slope is adjustable, A
42Be inverter, utilize it to produce the given V of slope current
SL, superposition is on constant current is given.Prestart utilizes A
43The positive output clamping voltage, at A
41Output produces 0.7V and blocks voltage, in case A
41Drift and external interference cause starting that impulse current is arranged the time.1KM is the starting operation relay.Starting current waveform such as Fig. 3.Behind electric motor starting, A
53Enter the automatic Regulation stage, A
41Work the effect of following, this moment is by A
44And T
4The voltage amplitude discriminator of forming is after starting reaches total head (or setting up voltage).T
4Saturation conduction, P
43Excision makes ramp generator inoperative.Voltage regulator A
53, being the degenerative pi regulator of band shunt voltage differential, the voltage negative feedback signal is obtained by the transformer and the rectifying and wave-filtering 8 of motor terminal.Pressure regulation signal V
LS, V
F φCircuit by Fig. 5 Fig. 6 is supplied with.Voltage given V
SVBy P
44Obtain.The above signal of comprehensive adjustment makes motor run on certain point voltage, and voltage is low when sky, underloading, and voltage height (or total head) during heavy load is energy-conservation to realize automatic Regulation.The existence of Voltage loop has reduced change in voltage or the rush of current when switching not to the utmost, and the stability of voltage, electric current during the dark pressure regulation of the rapidity when having improved pressure regulation and bringing onto load.
Fig. 4 has designed one from delay circuit, during starting with R
S(see Fig. 1 15) place in circuit makes the controllable silicon can conducting, can stablize mild starting to guarantee motor, and starting current size no matter does not all produce any shake or rises towards reversing.
Utilize Fig. 6 detect phase angle feedback control signal V
F φ, obtain power supply voltage signal by 19 earlier, 18 obtain load current signal, through A
81, A
82Shaping, diode logic gate circuit and photoelectrical coupler O
8The pulse of output phase angle, the phase angle pulse of three-phase is at A
83In export V after comprehensive, the filtering
F φ. when sky, when the underloading phase angle is big, V
F φGreatly, control A
53Voltage is reduced, energy-conservation to realize step-down.Fig. 7 for this reason circuit each mainly put work wave.
If load strengthened suddenly when motor was in low-voltage, rise not for not making motor rotation blockage or speed, immediately boosted voltage.Fig. 5 is for obtaining the heavy load control signal circuit that boosts.It is by A
54, P
46, V
FIConstitute voltage comparator.During heavy load, as its current feedback V
FI＞V
46(P
46The load voltage of last setting), output-V
LSMake A
53Reach amplitude limit output at once, the very fast liter of motor reaches total head, and heavy load is gone over, A
53Output by V
SV, V
FVAnd V
F φDecision, voltage descend again automatically.For the periodic shock load that great machinery inertia is arranged, can utilize external control position switch K closure, input external control signal V
E * T=V
LS, make to rise total head in advance.Position switch can make with various travel switches.Load factor changed little periodic load operating mode when the heavy load boost signal also can be used for heavy load, work on two point voltages that it is determined when sky, underloading and heavy load, and can set up and obtain best energy conservation point, energy-saving effect is remarkable, and circuit can be simplified greatly.
Fig. 8 is the circuit of a phase trigger, through the 19 power supply synchronizing voltages of obtaining, after the capacitance-resistance filter phase shift, passes through A
11Produce the reverse charging pulse, A
12Produce sawtooth waveforms, A
13Comprehensively by current regulator A
41The control signal V that comes
Ct, produce and trigger broad pulse, with A
51The modulation high frequency that sends is modulated and power amplifier in switch transistor T WH8752, at last by pulse transformer TPA output trigger impulse.Upo is from securitron, and the input positive voltage is to block controllable silicon during fault.
Each mainly puts work wave to Fig. 9 for trigger.
This device also has Electronic Protection and fault display systems such as complete overcurrent, phase shortage, overload, zero-pressure, makes work very convenient reliable.Main circuit also can insert contactor, but it when mainly playing remote operation drop-out voltage use.Bringing onto load is not connected and is cut-off main circuit, and therefore shortcoming such as contact no-spark galvanic corrosion has improved reliability.
The utility model compared with prior art has following advantage:
1, starting current can be controlled in reliable rapidly starting in 1.5～3.5 times of rated current scopes, and is more much lower than same device.When the twice starting current (380 volts of power supplys), starting voltage can reach more than the line voltage 302V, and is bigger than Y-△ starting torque.No matter to pump apparatus or permanent torque equipment, the starting characteristic that can both transfer preferablely.
2, no matter no any electric current and torque shock ends set the starting current size, and starting all steadily and non-jitter or rise and dash counter-rotating.
3, during bringing onto load, voltage can be stablized and drop to locked-rotor voltage, and rapidity was good when high and low pressure was changed back and forth, and impulse current is little, and maximum switch current is not more than 1/3～1/2 of starting current.
4, adopt the phase angle feedback, can be when load variations, control system pressure regulation at any time.For the impact heavy load, utilize the heavy load signal to make motor be upgraded to full voltage immediately.To the periodic shock load of great machinery inertia, can adopt the external control position switch to rise total head in advance, the carrying load ability during with the pressure regulation of raising motor.For having periodic heavy load and load factor to change little operating mode, the two point form pressure regulation also can have obvious energy-saving effect, and system can simplify greatly.
5, designed trigger performance is good, and strong to the anti-interference effect of voltage ripple of power network and harmonic effects, phase shift range is wide, and good linearity is output as spike train, and power consumption is little, and piece volumes is little, and one has only used a four high guaily unit and a switching tube mutually.Versatility is good, to 20～1000A controllable silicon, only needs to change pulse transformer, and other are constant substantially and need not debug; Doing change slightly can be used in the direct current three-phase full-controlled bridge.
Therefore the utility model is suitable for as AC induction motor starting and pressure regulating energy-saving control usefulness, and it can reduce the starting capacity of power supply greatly, and steadily reliable starting has obvious energy-saving effect.
The utility model is at laboratory control JO
2-4 2-4 type 5.5KW motors were made comprehensive test, and unloaded pressure regulation steadily drops to 102 volts of line pressures, and electric current drops to 2A by 4.8A, and the bringing onto load total head is switched, and the maximum impact electric current proves above-mentioned feature performance benefit fully not in 8A, at the JO of steel plant
3Make overtesting on-225S-4 type 55KW driven by motor blower fan and the circulating water pump, open a sluice gate starting, electric current is to rise on 1.5～1.9 times of slopes, and starting steadily, rapidly.When the motor load rate was zero, meritorious power saving rate was 64.7%, and load factor is that 33.3% meritorious power saving rate is 10.38%.The trigger of device can be stablized phase shift in 20 ° of-180 ° of scopes, to strong voltage fluctuation of steel plant and Harmonic Interference, errorless pulse produces, waveform stabilization, reliable operation.
Claims (7)
1, a kind of AC asynchronous motor starting energy-saving appliance, the double closed-loop control system control silicon controlled trigger angle that adopts voltage regulator and current regulator to form, carry out the pressure regulation current limliting, it is characterized in that: electric current loop is made up of the current regulator of band constant current and slope current given circuit; Voltage loop is made up of voltage modulator circuit, the automatic testing circuit of phase angle, heavy load signal circuit; Anti-twitter circuit of starting and trigger to silicon controlled conducting specifically control.
2, by the described AC asynchronous motor starting of claim 1 energy-saving appliance, it is characterized in that: it is given that current regulation circuit has a given and slope current of constant current, slope current is given to be the adjustable integrating circuit of charging slope that is made by amplifier, and the voltage comparator that band is made up of amplifier, triode constitutes; Obtain current signal from the current transformer of three-phase main circuit, behind rectifying and wave-filtering, obtain current feedback.
3, press the described AC asynchronous motor starting of claim 1 energy-saving appliance, it is characterized in that: voltage regulator is the degenerative pi regulator of band shunt voltage differential, and it is comprehensive, the adjusting control signal, and voltage feedback signal is obtained by motor terminal by transformer.
4, by the described AC asynchronous motor of claim 1 starting energy-saving appliance, it is characterized in that: the anti-twitter circuit of starting, use from delay circuit three resistance R, place in circuit, three-phase controllable silicon can be in conducting state when making starting.
5, by the described AC asynchronous motor starting of claim 1 energy-saving appliance, it is characterized in that: the automatic testing circuit of phase angle, press signal by the power supply power taking, current transformer is obtained current signal, active filter through amplifier shaping circuit, diode logic door, photoelectrical coupler and amplifier composition, obtain the phase angle feedback signal, send voltage regulator control pressure regulation.
6, by the described AC asynchronous motor starting of claim 1 energy-saving appliance, it is characterized in that: the heavy load signal circuit, form the heavy load comparator by amplifier, export a pressure regulation signal.Or use the external control position signalling, when heavy load will be come, supply with boost signal, the energy-conservation and carrying load ability when improving the motor pressure regulation of automatic Regulation.
7, by the described AC asynchronous motor starting of claim 1 energy-saving appliance, it is characterized in that: thyristor gating circuit, obtain synchronizing voltage from power supply after, use the capacitance-resistance phase-shift filtering, through amplifier, diode, capacitance-resistance, produce the zero passage charging pulse, form sawtooth waveforms, produce trigger impulse through the amplifier composite control signal, carry out high frequency modulated and power amplifier by switching tube, by pulse transformer output trigger impulse row, during faults such as overcurrent, phase shortage, can directly block trigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91230041 CN2121771U (en) | 1991-09-30 | 1991-09-30 | Starting energy-saving device for AC asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91230041 CN2121771U (en) | 1991-09-30 | 1991-09-30 | Starting energy-saving device for AC asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2121771U true CN2121771U (en) | 1992-11-11 |
Family
ID=4935415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91230041 Granted CN2121771U (en) | 1991-09-30 | 1991-09-30 | Starting energy-saving device for AC asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2121771U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801371A (en) * | 2012-08-01 | 2012-11-28 | 中国兵器工业第二O二研究所 | Boosting power control method of alternating-current servo driver |
| CN103078564A (en) * | 2013-01-18 | 2013-05-01 | 广西梧州五一塑料制品有限公司 | Soft-start intelligent electricity-saving controller |
| CN103166189A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Delayed alarm protection method for alternating current (AC) variable-pitch motor |
| CN103166190A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Alternating current variable-pitch motor protection device and method |
-
1991
- 1991-09-30 CN CN 91230041 patent/CN2121771U/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166189A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Delayed alarm protection method for alternating current (AC) variable-pitch motor |
| CN103166190A (en) * | 2011-12-19 | 2013-06-19 | 苏州能健电气有限公司 | Alternating current variable-pitch motor protection device and method |
| CN102801371A (en) * | 2012-08-01 | 2012-11-28 | 中国兵器工业第二O二研究所 | Boosting power control method of alternating-current servo driver |
| CN102801371B (en) * | 2012-08-01 | 2014-11-19 | 中国兵器工业第二O二研究所 | Boosting power control method of alternating-current servo driver |
| CN103078564A (en) * | 2013-01-18 | 2013-05-01 | 广西梧州五一塑料制品有限公司 | Soft-start intelligent electricity-saving controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104362631B (en) | A kind of high-power idle control method with the dynamic mixing compensation system of harmonic wave | |
| CN2891473Y (en) | Photoelectric current transformer with offline/online, charging control and power regulation functions | |
| CN101217260A (en) | A slip control digital intelligent speed regulation and system of motor without speed transducer | |
| CN1841904A (en) | Method for shutting thyratron transistor and its thyratron transistor high-pressure frequency converter | |
| Somkun et al. | Novel control technique of single-phase PWM rectifier by compensating output ripple voltage | |
| CN201967167U (en) | Induction heating dual-cycle controller | |
| CN2121771U (en) | Starting energy-saving device for AC asynchronous motor | |
| CN102035459B (en) | Intelligent motor controller | |
| CN2847684Y (en) | Energy saving type AC voltage stabilizer | |
| CN201146481Y (en) | Medium-voltage motor slip-control digital intelligence speed-regulating device without speed sensor | |
| CN108134541B (en) | asynchronous motor soft starter and predictive feedback control method based on same | |
| CN104935213B (en) | The grid-connected system and method for realizing soft starter for motor of high voltage converter | |
| CN102361424B (en) | Fuzzy control strategy-based asynchronous motor soft starter | |
| CN204119072U (en) | The two PWM source of welding current of Direct Current Control | |
| CN87200105U (en) | Continuous power supply unit | |
| CN1102254C (en) | Method and equipment for overall increasement of electricity quality | |
| CN1144364C (en) | Method and device for restraining dc component of current in monocyclie controlled active wavefilter | |
| CN2244788Y (en) | Soft control energy-saver for motor running | |
| CN204030997U (en) | A kind of matrix form AC-dc converter | |
| CN2591864Y (en) | Single-phase AC motor efficient electricity-saving device | |
| CN113315348B (en) | Drive control method of silicon controlled rectifier power supply and silicon controlled rectifier power supply | |
| EP4346080A1 (en) | Totem pole power factor correction circuit and method of operating the same | |
| Yu et al. | A novel induction motor soft starter based on magnetically controlled reactor | |
| CN2058042U (en) | Energy-saving controllor of motor | |
| CN2222030Y (en) | Quick compensation device for power factor of electric welding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |