CN201430569Y - Motor load adjusting device - Google Patents
Motor load adjusting device Download PDFInfo
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- CN201430569Y CN201430569Y CN2009200908251U CN200920090825U CN201430569Y CN 201430569 Y CN201430569 Y CN 201430569Y CN 2009200908251 U CN2009200908251 U CN 2009200908251U CN 200920090825 U CN200920090825 U CN 200920090825U CN 201430569 Y CN201430569 Y CN 201430569Y
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Abstract
The utility model discloses an energy-saving control device for the operation of a motor, in particular relates to a motor load adjusting device. The device comprises a main control loop, a three-phrase current detecting circuit and a voltage detecting circuit which are connected with a motor, a singlechip control circuit, a trigger circuit as well as a thyristor connected in the main control loop, wherein the current and voltage detecting circuits are in input connection with the singlechip control circuit, the singlechip control circuit is in output connection with the trigger circuit, the trigger circuit is in control connection with the thyristor, current signals detected from three phase current and zero sequence current are sent to an A/D converter after voltage change and amplification, and analog signals are converted to be digital signals through the A/D converter and then sent to the control circuit of the singlechip; voltage signals output by the voltage detecting circuit isconverted to be digital signals through the A/D converter and then sent to the control circuit of the singlechip; the control circuit of the singlechip is used for operation processing on the circuitand voltage signals and outputting control signals through the control output port thereof, and is connected with the control port of the trigger circuit through an amplification circuit.
Description
One, technical field:
The utility model relates to a kind of motor energy saving in running control device, particularly relates to a kind of motor load adjusting device according to motor load real-time regulated power output.
Two, background technology:
Asynchronous motor is the main dynamics equipment in the industrial and agricultural production process, relates to all trades and professions of industrial and agricultural production.According to relevant, there are 1,000,000,000 motors in China approximately in operation at present, accounts for 60% of nationwide integrated power grid total load.Because diversity, the complexity of production environment, and the influence of the factors such as randomness of load variations in running, in the electric system of actual motion, there is 6 one-tenth motor under the load condition that is lower than design rated load 60%, to move approximately, cause electricity consumption to be wasted up to 30%.Motor load rate is low, and power factor is low, and efficient is low, has caused very big electric energy loss.The energy is the lifeblood of country " good and fast " development, and country has been placed on very important position to the electric system energy conservation project in " Eleventh Five-Year Plan ten big emphasis energy conservation project implementation guidelines ".Electric motor energy-saving technique is promoted in research and development under these circumstances, and the construction that advances China energy-efficient society is had positive meaning.
Those skilled in the relevant art have carried out more research to energy saving motor operation and control technology both at home and abroad, many electric appliance energy-saving products are come out one after another, and improve the new energy-saving motor, variable-frequency control technique etc. of motor electromagnetism transformation efficiency as adopting the new material new process new technology.Though present domestic and international variable-frequency control technique is very ripe, the variable-frequency control technique main purpose is speed governing, and the control accuracy height has energy-saving effect preferably concurrently.In the occasion that does not need speed governing,, make the ratio of performance to price of variable frequency regulating speed control seem lower owing to reasons such as its technical sophistication, price height.And in manufacturing machine, widely used medium and small motor is most of only to be needed energy-conservation and does not need or even do not allow speed governing, this situation of the obvious incompatibility of variable-frequency control technique.So far, in, the power-saving technology in small size motor running equipment still is in the development phase, also not have ripe relatively collection is energy-conservation, control, be protected in one technology and product appearance.
Three, utility model content:
The utility model is at the prior art deficiency, a kind of motor load adjusting device is proposed, mainly form by main control loop, circuits for triggering, testing circuit and single chip machine controlling circuit etc., reasonably control during by and light running unloaded motor, raise the efficiency and power factor, and then reach purpose of energy saving.
The technical scheme that the utility model adopted:
A kind of motor load adjusting device, contain the main control loop that output connects motor, the three-phase current that connects motor, voltage detecting circuit, single chip machine controlling circuit, circuits for triggering and be connected thyristor in the main control loop, three-phase current, the voltage detecting circuit input connects single chip machine controlling circuit, single chip machine controlling circuit output connects circuits for triggering, circuits for triggering control connection thyristor, it is characterized in that: contain circuit measuring zero phase sequence current, the current signal that three-phase current and zero-sequence current detect is given A/D converter through voltage transformation with after amplifying respectively, becomes digital signal to send single chip machine controlling circuit to analog signal conversion through A/D converter; The voltage detecting circuit output voltage signal converts digital signal to through A/D converter and gives single chip machine controlling circuit; Single chip machine controlling circuit carries out calculation process to described electric current and voltage signal, and by its control output end mouth output control signal, this control output end mouth connects an amplifying circuit, and described amplification circuit output end is connected with the control port of circuits for triggering.
Described motor load adjusting device, contain real-time demonstration, keyboard operation system, described real-time demonstration, keyboard operation system comprise single-chip microcomputer U1, and one group of I/O input port that single-chip microcomputer U1 is set is connected with keyboard S1-S5 respectively, and one group of I/O output port is connected with LCD; Single-chip microcomputer U1 is provided with one group of PORT COM and imports and the controlled function end with a control port is connected a communication chip after photoelectricity is isolated correspondence, and described communication chip FPDP communication connects host computer, finishes transfer of data and exchanges data with host computer; The corresponding port of single-chip microcomputer U2 connects in the COM port of single-chip microcomputer U1 and the single chip machine controlling circuit, realizes the exchanges data with single chip machine controlling circuit.
Described motor load adjusting device, A phase, B phase, C mutually and zero sequence current mutual inductor corresponding operating current signal mutually be transformed to voltage signal through transformer and a transfer resistance give operational amplifier through coupling resistance, operational amplifier output amplifying signal inserts A/D converter, and A/D converter becomes digital signal to send single-chip microcomputer U2 in the single chip machine controlling circuit to analog signal conversion; Current signal is transformed to voltage signal by input protection diode concatenation operation amplifier.
Described motor load adjusting device, the voltage detecting circuit output voltage signal inserts operational amplifier U7 through the resistance coupling, operational amplifier U7 output voltage signal inserts A/D converter U4 through the resistance coupling, A/D converter U4 is connected with the I/O input port of single-chip microcomputer U2, gives single-chip microcomputer U2 with digital signal.
The energy saving motor Analysis on Mechanism: the threephase asynchronous operation time need absorb lagging reactive power from electrical network and set up magnetic field, so the power factor of asynchronous motor always lags behind.When unloaded, stator current mainly is idle exciting current, so power factor is very low, is no more than 0.2 usually.During load running, along with the increase of load, power factor rises gradually, and near nominal load, power factor is the highest.
Motor is very little at normal range of operation internal cause main flux and rotation speed change, so iron loss P
FeAnd mechanical loss P
MecThink fixed loss.And the copper loss P of stator, rotor
Cu1And P
Cu2, supplementary load loss P
AdBecome with load, be called variable loss.When load increased to variable loss and equals fixed loss, efficient reached the highest.Generally the highest in (0.7～1.0) PN scope internal efficiency.Because when asynchronous motor was unloaded, s was very little for revolutional slip, rotor current is very little, and the copper loss of rotor can be ignored.Input power consumption this moment is at the copper loss P of stator
Cu1=3R
1I
0 2, iron loss P
Fe, mechanical loss P
MecWith unloaded supplementary load loss P
AdOn, that is:
P
0＝3R
1I
0 2+P
Fe+P
mec+P
ad
From no-load power P
0In deduct 3R
1I
0 2, and use P
0' expression,
P
0′＝P
0-3R
1I
0 2＝P
Fe+P
mec+P
ad
Because P
FeAnd P
AdWith voltage U
1Variation and change and P
MecWith voltage U
1Irrelevant, only depend on the size of motor speed, when rotation speed change is little, can think P
MecBe constant.Because P
FeAnd P
AdCan think and square being directly proportional of magnetic flux density, can regard as approx and terminal voltage U
1 2Be directly proportional.
By above analysis, if the long-term unloaded underload operation down of motor, efficient and power factor are all low, and electric energy loss is very big, reduces voltage and is actually the no-load power that has reduced motor.
The utility model motor load adjuster, in service according to the motor operation characteristic at motor, judge the operating state of loading by current sampling signal, adopt intelligentized microprocessor control, dynamically adjust the voltage and current of output.During underloading, reduce output voltage automatically, exciting current is only reduced to the constant torque that keeps load be complementary.When load increases, voltage will rise automatically to prevent motor stall, improve the operational efficiency and the power factor of motor, reduce the loss of electric energy, reach the purpose of economize on electricity.
Useful good effect of the present utility model:
1, the utility model motor load adjusting device is carried out tracking Control according to the motor operating condition to the input voltage of motor, adopt approximatioss to reduce the operating voltage of asynchronous motor, the power output and the load torque that guarantee asynchronous machine accurately mate, make motor always work in the peak efficiency state, reach the purpose of economize on electricity.Be applied to produce reality, power savings is obvious, and economic benefit and snake meeting remarkable benefit will be made positive contribution for energy-saving and emission-reduction.
2, the utility model motor load adjusting device has realized the power-saving running control to asynchronous motor, and it is applied, and will produce tangible economic benefit and long-range social benefit.For the energy saving motor control device of realizing 30～55kw, its indicator of costs is analyzed as follows: shell: 200 yuan; Based Intelligent Control plate: 2500 yuan; Power switch component: 1500 yuan; Processing cost: 200 yuan (containing accessory wage part); Administration fee: 100 yuan; Equipment depreciation: 300 yuan; Tax: 800 yuan.Add up to: 5600 yuan.The 30kW pump motor that moves with director's phase is an example, per hour power consumption is 30 degree, and every day, power consumption was 720 degree, if load factor is 70%, measured data according to type approval test, after energy saver put into operation, the motor actual power consumption was reduced to 16.5kw by 21.1kw, reduced consumed power 4.6kw, move 20 hours every day, then a year saving electric energy 33580 is spent, and every degree electricity price can be saved 20148 yuan of the electricity charge every year by 0.6 yuan of calculating.
3, the exploitation meaning of the utility model motor load adjusting device not merely is to reduce the running wastage of motor; reduce the economic benefit of enterprise's production cost; also have simultaneously immeasurable social benefit: energy-saving and emission-reduction, reduce the wasting of resources, help environmental protection simultaneously.
Four, description of drawings:
Fig. 1: the utility model motor load adjusting device theory diagram
Fig. 2: single chip machine controlling circuit theory diagram in the utility model motor load adjusting device
Fig. 3: the utility model motor load adjusting device voltage, current detection circuit schematic diagram
Fig. 4-1: the utility model motor load adjusting device A/D change-over circuit schematic diagram
Fig. 4-2: the utility model motor load adjusting device control circuit single-chip microcomputer U2 schematic diagram
Fig. 5: the motor load adjusting device shows in real time, keyboard operation circuit system schematic diagram
Fig. 6: the regulating characteristics of motor and natural operating ratio: the apparent power curve chart
Fig. 7: the regulating characteristics of motor and natural operating ratio: the reactive power curve chart
Fig. 8: the regulating characteristics of motor and natural operating ratio: the load current curve chart
Five, embodiment:
Embodiment one: referring to Fig. 1, Fig. 2, the utility model motor load adjusting device, contain the main control loop that output connects motor, the three-phase current that connects motor, voltage detecting circuit, single chip machine controlling circuit, circuits for triggering and be connected thyristor in the main control loop, three-phase current, the voltage detecting circuit input connects single chip machine controlling circuit, single chip machine controlling circuit output connects circuits for triggering, circuits for triggering control connection thyristor, contain circuit measuring zero phase sequence current, the current signal that three-phase current and zero-sequence current detect is given A/D converter through voltage transformation with after amplifying respectively, becomes digital signal to send single chip machine controlling circuit to analog signal conversion through A/D converter; The voltage detecting circuit output voltage signal converts digital signal to through A/D converter and gives single chip machine controlling circuit; Single chip machine controlling circuit carries out calculation process to described electric current and voltage signal, and by its control output end mouth output control signal, this control output end mouth connects an amplifying circuit, and described amplification circuit output end is connected with the control port of circuits for triggering.
The physical circuit principle is referring to Fig. 3, Fig. 4-1, Fig. 4-2, and to convert A phase operating current to pro rata little current signal be the input protection diode through T5, R2 voltage of transformation signal, the D05 that is attached thereto, D06 to the A phase current mutual inductor among Fig. 3.Voltage signal is given 2,3 ports of operational amplifier U5 through R7, R9, signal after the amplification is given 15,16 ports of A/D converter U1 through R4, R5, A/D converter U1 becomes digital signal with analog signal conversion, digital signal is connected with 45 ports of single-chip microcomputer U2 through 20 ports of A/D converter U1, gives single-chip microcomputer U2 with digital signal; It is the input protection diode through T11, R20 voltage of transformation signal, the D07 that is attached thereto, D08 that the B phase current mutual inductor converts B phase operating current to pro rata little current signal.Voltage signal is given 2,3 ports of operational amplifier U9 through R19, R25, signal after the amplification is given 15,16 ports of A/D converter U4 through R14, R16, A/D converter U1 becomes digital signal with analog signal conversion, digital signal is connected with 41 ports of single-chip microcomputer U2 through 20 ports of A/D converter U4, gives single-chip microcomputer U2 with digital signal; It is the input protection diode through T13, R24 voltage of transformation signal, the D10 that is attached thereto, D12 that the C phase current mutual inductor converts C phase operating current to pro rata little current signal.Voltage signal is given 2,3 ports of operational amplifier U11 through R41, R52, signal after the amplification is given 15,16 ports of A/D converter U5 through R19, R20, A/D converter U5 becomes digital signal with analog signal conversion, digital signal is connected with 46 ports of single-chip microcomputer U2 through 20 ports of A/D converter U5, gives single-chip microcomputer U2 with digital signal; Voltage transformer through T4, R1 with operating voltage convert pro rata voltage signal to, the D03 that is attached thereto, D04 are the input protection diode.Voltage signal is given 10,11 ports of A/D converter U1 through R2, R3, and A/D converter U1 becomes digital signal with analog signal conversion, and digital signal is connected with 45 ports of single-chip microcomputer U2 through 20 ports of A/D converter U1, gives single-chip microcomputer U2 with digital signal; Zero sequence current mutual inductor through T6, R3 with electric leakage signal convert voltage signal to, the D03 that is attached thereto, D04 are the input protection diode.Voltage signal is given 2,3 ports of operational amplifier U7 through R10, R12, signal after the amplification is given 10,11 ports of A/D converter U4 through R19, R20, A/D converter U4 becomes digital signal with analog signal conversion, digital signal is connected with 41 ports of single-chip microcomputer U2 through 20 ports of A/D converter U4, gives single-chip microcomputer U2 with digital signal.19 ports of single-chip microcomputer U2 are the control output end mouth of system, and this port is connected with 3 ports of operational amplifier UA1A through R26, and 1 port of operational amplifier UA1A is connected with the control port of trigger board.Single-chip microcomputer U2 finishes data acquisition, signal amplification, A/D conversion, data processing and the control output function of this system among Fig. 4-2.
Embodiment two: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4-1, Fig. 4-2, Fig. 5.Present embodiment motor load adjusting device, with embodiment one different be: contain real-time demonstration shown in Figure 5, keyboard operation system, realize by 485 chip U42 with the exchanges data of single-chip microcomputer U2 and with the communication of host computer.Its annexation is as follows: the 4-8 port operation input port of single-chip microcomputer U1 is connected with keyboard S1-S5 and LCD is finished human-computer dialogue together, realizes parameter setting, fault inquiry function.The 21-24 of single-chip microcomputer U1,26-28,32-39 port are connected with LCD 4-17 port, finish in good time parameter demonstration, parameter setting, fault inquiry function.12,13,25 ports of single-chip microcomputer U1 are connected with optical coupler U2-U4 port, and the 1-4 of optical coupler U2-U4 port and 485 chip U42 connects, and finishes transfer of data and exchanges data with host computer.11,12 ports of single-chip microcomputer U1 are connected with 19,21 ports of single-chip microcomputer U2, realize the exchanges data of two single-chip microcomputer U1, U2.
The utility model motor load adjusting device is utilized singlechip technology, adopts the C language to carry out programming, exploitation relevant detection, comparison, computing, Control Software program; The exploitation correspondent control circuits is finished motor electricity saving operation, soft start, is softly stopped, function control such as integrated protection.1), power factor has reflected load condition when asynchronous motor moves, power factor when moving by detecting asynchronous motor, the load state in the time of can obtaining the asynchronous motor operation.2), if asynchronous motor is operated under underloading, the Light Condition, the supply power voltage by approximatioss control asynchronous machine accurately mates the power output of asynchronous machine and load torque.Make asynchronous machine can under unloaded and most of load conditions, keep higher efficient.3), by the detection of electric current, voltage, power factor, rotating speed being realized power-saving running and integrated protection to asynchronous motor, comprise overload, short circuit, phase shortage, electric leakage, softly open, softly multinomial protection such as stop.
The utility model motor load adjusting device, adopt singlechip technology to detect, according to the motor operating condition input voltage of motor is carried out tracking Control, when motor zero load or underloading by data such as the torque of controlled motor, power factors, the output torque is little, power factor is low, and no-load current is big, and no-load loss is big, efficient is low, adjusting device progressively reduces output voltage, when reaching new balance, and motor stable operation under low-voltage.When motor load increases, the adjusting device boosted output voltages, output power of motor strengthens, and guarantees the balance of output torque, and motor always works in the peak efficiency state.Because when motor zero load or underloading, adjusting device reduces output voltage, motor moves under low-voltage, greatly reduces no-load current and reactive power, and the efficient of motor and power factor operate in higher state all the time, so power savings is remarkable.The power savings difference is that example is analyzed dynamo-electric effect with a 4kw motor below during the difference motor load.Respectively referring to table 1～table 5:
Table 1: motor P=0.0515kW (load factor=1.3%) time electrical impact analysis
| Project | Without adjusting | Through regulating | The reduction amount | Reduce percentage |
| Apparent power kVA | 3.61 | 1.70 | 2.61 | 47.75％ |
| Reactive power kvar | 3.56 | 1.65 | 2.61 | 47.75％ |
| Load current A | 5.5 | 3.2 | 2.2 | 23.75％ |
| Voltage V | 380 | 296 | 74 | 21.57％ |
Table 2: motor P=0.635kW (load factor=15.9%) time electrical impact analysis
| Project | Without adjusting | Through regulating | The reduction amount | Reduce percentage |
| Apparent power kVA | 3.59 | 2.17 | 1.42 | 35.50％ |
| Reactive power kvar | 3.52 | 2.06 | 1.46 | 36.44％ |
| Load current A | 5.6 | 3.9 | 1.75 | 17.50％ |
| Voltage V | 374 | 295 | 79.00 | 20.79％ |
Table 3: motor P=1.21kW (load factor=30%) time electrical impact analysis
| Project | Without adjusting | Through regulating | The reduction amount | Reduce percentage |
| Apparent power kVA | 3.63 | 2.79 | 0.85 | 21.13％ |
| Reactive power kvar | 3.43 | 2.60 | 0.83 | 20.75％ |
| Load current A | 5.60 | 4.68 | 0.93 | 9.25％ |
| Voltage V | 374.00 | 338.00 | 36.00 | 9.47％ |
Table 4: motor P=1.6kW (load factor=40%) time electrical impact analysis
| Project | Without adjusting | Through regulating | The reduction amount | Reduce percentage |
| Apparent power kVA | 3.77 | 3.11 | 0.66 | 16.44％ |
| Reactive power kvar | 3.40 | 2.70 | 0.70 | 17.56％ |
| Load current A | 5.9 | 5.2 | 0.65 | 6.50％ |
| Voltage V | 374.00 | 342 | 32.00 | 8.42％ |
Table 5: motor P=2.935Kw (load factor=73%) time electrical impact analysis
| Project | Without adjusting | Through regulating | The reduction amount | Reduce percentage |
| Apparent power kVA | 4.26 | 4.16 | 0.10 | 2.50％ |
| Reactive power kvar | 3.34 | 2.88 | 0.46 | 11.44％ |
| Load current A | 6.7 | 6.65 | 0.05 | 0.50％ |
| Voltage V | 373.00 | 352 | 21.00 | 5.53％ |
From top analysis economize on electricity most pronounced effects when the load factor of motor is low as can be seen, when the load factor of motor reaches 70% when above, the regulating characteristics of motor and natural operation characteristic difference are little.
Fig. 6～Fig. 8 is respectively the regulating characteristics of motor and natural operating ratio than apparent power, reactive power and load current curve chart, can clearly find out from figure: the motor load conditioning controller can change the input voltage of regulating motor continuously according to motor load, guarantees that motor always works in the peak efficiency state.The power factor of its motor voltage when the motion tracking motor is unloaded, unloaded meritorious power saving rate 〉=40%, meritorious integrated power-saving rate 10%～30%.The refrigeration machine of a 55kw motor uses the motor load conditioning controller can reduce power consumption 15%～20% in 1 year, can save the electricity charge 6～80,000 yuan, recoverable investment in 6 months.Prolonged simultaneously the life-span of power consumption equipment greatly, also indirect saving spending, popularizing application prospect is widely arranged.
Claims (4)
1, a kind of motor load adjusting device, contain the main control loop that output connects motor, the three-phase current that connects motor, voltage detecting circuit, single chip machine controlling circuit, circuits for triggering and be connected thyristor in the main control loop, three-phase current, the voltage detecting circuit input connects single chip machine controlling circuit, single chip machine controlling circuit output connects circuits for triggering, circuits for triggering control connection thyristor, it is characterized in that: contain circuit measuring zero phase sequence current, the current signal that three-phase current and zero-sequence current detect is given A/D converter through voltage transformation with after amplifying respectively, becomes digital signal to send single chip machine controlling circuit to analog signal conversion through A/D converter; The voltage detecting circuit output voltage signal converts digital signal to through A/D converter and gives single chip machine controlling circuit; Single chip machine controlling circuit carries out calculation process to described electric current and voltage signal, and by its control output end mouth output control signal, this control output end mouth connects an amplifying circuit, and described amplification circuit output end is connected with the control port of circuits for triggering.
2, motor load adjusting device according to claim 1, it is characterized in that: contain real-time demonstration, keyboard operation system, described real-time demonstration, keyboard operation system comprise single-chip microcomputer U1, one group of I/O input port that single-chip microcomputer U1 is set is connected with keyboard S1-S5 respectively, and one group of I/O output port is connected with LCD; Single-chip microcomputer U1 is provided with one group of PORT COM and imports and the controlled function end with a control port is connected a communication chip after photoelectricity is isolated correspondence, and described communication chip FPDP communication connects host computer, finishes transfer of data and exchanges data with host computer; The corresponding port of single-chip microcomputer U2 connects in the COM port of single-chip microcomputer U1 and the single chip machine controlling circuit, realizes the exchanges data with single chip machine controlling circuit.
3, described motor load adjusting device according to claim 1 and 2, it is characterized in that: A phase, B phase, C mutually and zero sequence current mutual inductor corresponding operating current signal mutually be transformed to voltage signal through transformer and a transfer resistance give operational amplifier through coupling resistance, operational amplifier output amplifying signal inserts A/D converter, and A/D converter becomes digital signal to send single-chip microcomputer U2 in the single chip machine controlling circuit to analog signal conversion; Current signal is transformed to voltage signal by input protection diode concatenation operation amplifier.
4, described motor load adjusting device according to claim 3, it is characterized in that: the voltage detecting circuit output voltage signal inserts operational amplifier U7 through the resistance coupling, operational amplifier U7 output voltage signal inserts A/D converter U4 through the resistance coupling, A/D converter U4 is connected with the I/O input port of single-chip microcomputer U2, gives single-chip microcomputer U2 with digital signal.
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| CN2009200908251U CN201430569Y (en) | 2009-06-15 | 2009-06-15 | Motor load adjusting device |
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| CN2009200908251U CN201430569Y (en) | 2009-06-15 | 2009-06-15 | Motor load adjusting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088263A (en) * | 2011-01-20 | 2011-06-08 | 杭州华光电气有限公司 | Soft starter with waveform analysis function |
| CN104410333A (en) * | 2014-11-27 | 2015-03-11 | 南通雅本化学有限公司 | Remote intelligent soft-start cabinet |
| CN108540036A (en) * | 2017-03-02 | 2018-09-14 | 中山市东裕景顺节能设备有限公司 | No humorous sinewave power corrects electricity-saving control device |
-
2009
- 2009-06-15 CN CN2009200908251U patent/CN201430569Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088263A (en) * | 2011-01-20 | 2011-06-08 | 杭州华光电气有限公司 | Soft starter with waveform analysis function |
| CN102088263B (en) * | 2011-01-20 | 2013-05-29 | 杭州华光电气有限公司 | Soft starter with waveform analysis function |
| CN104410333A (en) * | 2014-11-27 | 2015-03-11 | 南通雅本化学有限公司 | Remote intelligent soft-start cabinet |
| CN108540036A (en) * | 2017-03-02 | 2018-09-14 | 中山市东裕景顺节能设备有限公司 | No humorous sinewave power corrects electricity-saving control device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20110615 |