CN201078842Y - Alternating current machine electricity economizer - Google Patents
Alternating current machine electricity economizer Download PDFInfo
- Publication number
- CN201078842Y CN201078842Y CNU2007201498024U CN200720149802U CN201078842Y CN 201078842 Y CN201078842 Y CN 201078842Y CN U2007201498024 U CNU2007201498024 U CN U2007201498024U CN 200720149802 U CN200720149802 U CN 200720149802U CN 201078842 Y CN201078842 Y CN 201078842Y
- Authority
- CN
- China
- Prior art keywords
- motor
- load
- alternating current
- transformer
- current machine
- 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
Abstract
The utility model relates to an AC motor power saver, which aims at solving the technical problem of how to provide an AC motor power saver and comprises a voltage regulation unit and a controller. The voltage regulation unit comprises a regulating power transformer and an isolating transformer. The utility model is characterized in that: the utility model also comprises a load-sensing unit which comprises a motor load sensor for monitoring motor load change; the motor load sensor is communicated with the signal output end of the controller. The utility model has the advantages of obvious power saving effect and low cost, and is suitable for various AC motors, in particular to motors with large fluctuation of load.
Description
Technical field
The utility model relates to a kind of alternating current machine electricity-saving appliance.
Background technology
At present, in the motor using electricity system, wasting phenomenon is very general.For the user, the electrical load that relative distance power plant or transformer station are nearer, the waste of energy space that the superfluous voltage that power supply network applied causes is relatively large; Great majority all have certain waste of energy space with the every profession and trade power consumption equipment of motor as mechanical power source under the situation of not taking conservation measures.Particularly in place that the size of the mechanical load power of large-size machine often changes, the phenomenon of " low load with strong power " waste electric energy always frequently takes place, this dynamic waste of energy space is that the kinetic property by living load is caused, and is to be easy to be ignored by people.Have only the design margin of minority mechanical driver unit too big, the kinetic property of mechanical load is again to be tending towards under the situation of permanent power or permanent torque, and it just can exist with the form of constant.
Treat above-mentioned waste situation, the power-saving measures that can take is to use variable-frequency control technique and phased Semiconductor Converting Technology at present, makes the power supply variation of follow load at any time, reaches the energy-conservation purpose of power supply as required.But from the position of economize on electricity, environmental protection, this type of technology exists following shortcoming.
1, variable-frequency control technique is the low-frequency ac voltage rectification to be become direct voltage use electronic switch copped wave to form high frequency square wave then, isolates last synthetic through frequency modulation(FM) and the adjustable sinusoidal voltage of amplitude again through high frequency transformer.The phase control technology is that the low-frequency ac voltage rectification is become pulsating dc voltage, adjusts the size of the angle of flow of controllable silicon SCR then as requested, forms the voltage that is cut later remaining waveform composition with sinusoidal wave.Under the situation of high-power operation, the use result of this class battery saving arrangement has produced new high-frequency loss waste of energy in the transmission course of electric energy, and the power circuit of motor and the space environment of periphery thereof have all been caused the high frequency electromagnetic radiation pollution.
2, the purpose of variable-frequency governor is to realize the stepless speed regulation of motor, and electricity-saving function is its side effect.In fact, 80%～95% motor is not need also not allow to change rotating speed in use.In the use of frequency conversion power saving device, reduce the supply frequency of motor, just reduced the impedance of motor, cause the long-term overcurrent of motor stator winding and armature thereof to use, make that motor generates heat meaninglessly, armature is aging prematurely, shortened its useful life, finally caused the user to save electric energy and but can not save cost.
3, because the existence of semi-conductive P-N knot forward voltage drop and semiconductor bulk resistor, when big electric current moves, high power semi-conductor field effect transistor or thyristor groups compound module IGBT assembly or SCR assembly all can produce a large amount of heats, the danger that caused thermal breakdown in addition and burnt high power device when the temperature rise of the not enough transistor of area of dissipation improves constantly, this has brought potential safety hazard with regard to the user who gives these energy-saving devices.For this reason, in actual applications, people have to take passively to comprise that ways such as using radiator fan, special air conditioner refrigeration plant solves the radiating and cooling problem of large power semiconductor device.This has just formed new waste of energy space and new potential safety hazard again ...
4, the human quality of materials that still can't control to the molecular number magnitude so far in semiconductor fabrication process is because of distortion takes place or mix plating to ooze and inject " accidental failure " problem that unequal reason caused and still be not resolved in material structure.Frequency conversion and the phased semiconductor variable flow battery saving arrangement manufacturing technology in aspects such as fail safe, reliability, functions the environment of high-voltage large-capacity power supply power supply is still not exclusively ripe, complete machine by external introduction involves great expense, equipment is tender and lovely, operational environment requires very harsh, and security performance can't be expected.
Mains supply voltage is being subjected to line drop and power load influence of fluctuations fluctuation often to occur, power supply department uses for guaranteeing the user, the voltage of the supply line that is provided is often more higher than rated voltage, exceeded the suitable voltage range of consuming device, in this case, will cause waste of electric energy.
Based on above-mentioned cognition, the utility model people is that October 29, notification number in 2003 are the CN 2583855Y and the day for announcing to be to disclose a kind of new approaches that realize economize on electricity by step-down in February 9, notification number in 2005 two the new patent documentations of practicality that are CN 2677979Y in the day for announcing.But in above-mentioned two patents, monitoring is not output loading to similarly being input voltage, and the step-down amplitude is limited, when load falls sharply, even the voltage after the process step-down remains surplus, when motor underloading or zero load, still has very big waste.
The utility model content
The technical problems to be solved in the utility model is the above-mentioned defective that how to overcome existing motor power saving technology, and a kind of alternating current machine electricity-saving appliance is provided.
For solving the problems of the technologies described above, the utility model alternating current machine electricity-saving appliance comprises pressure regulation unit and controller, it is characterized in that: it also comprises the load-transducing unit, this load-transducing unit comprises and is used to monitor the motor load transducer that motor load changes that this motor load transducer communicates with the signal output part of described controller.
As optimization, described pressure regulation unit comprises voltage controller power source transformer and autotransformer, wherein, the current coil of autotransformer is serially connected between power input and the load motor, form major loop, the primary coil of voltage controller power source transformer is connected across between power input and the zero-power line end, its secondary coil is provided with a plurality of taps, each tap is connected to a relay switch, one end of the potential winding of another termination autotransformer of above-mentioned relay switch, the other end of this potential winding is connected between power input and the load motor.
As optimization, described pressure regulation unit comprises voltage controller power source transformer, isolating transformer, wherein, the primary coil of described voltage controller power source transformer is connected across between power input and the zero-power line end, its secondary coil is provided with a plurality of taps, one end of the first polar curve circle of one of them tap and isolating transformer joins, each remaining tap by separately relay switch and the other end of the first polar curve circle of isolating transformer join; The signal input part of each relay switch communicates with the corresponding signal output part of controller, and the secondary coil of described isolating transformer is serially connected between power input and the load motor, forms major loop.
The difference of above-mentioned two kinds of prioritization schemes is: the former selects autotransformer for use, is applicable to the motor that operating voltage is lower, and the latter selects isolating transformer for use, is applicable to the motor that operating voltage is higher.
As optimization, described load cell is the current of electric instrument transformer, and described relay switch is a solid-state relay, and above-mentioned solid-state relay forms the solid-state relay matrix unit.Current transformer is quick on the draw, and is easy for installation.
As optimization, described load cell comprises transmitter and speed probe or torque sensor, and described relay switch is a solid-state relay, and above-mentioned solid-state relay forms the solid-state relay matrix unit.It is that load variations directly embodies that resistive torque changes.
As optimization, the pressure regulation unit of this alternating current machine electricity-saving appliance comprises a plurality of isolating transformers or autotransformer, the secondary coil of above-mentioned isolating transformer, or the current coil of above-mentioned autotransformer is connected in the major loop successively.This design is particularly suitable for some motors that need pressure regulation significantly and uses.
As optimization, described secondary coil or potential winding and a major loop relay switch are connected into the part of major loop mutually, and are furnished with bypass, and this bypass is provided with the bypass relay switch.Use bypass power supply when electric motor starting or other special circumstances, pass through main circuit power supply after the normal operation.
As optimization, also be provided with the by-pass current instrument transformer in the described bypass, this by-pass current instrument transformer connects the pilot signal input of controller.Be convenient to monitor bypass and whether disconnect, prevent the current coil short circuit of bypass the secondary coil or the autotransformer of isolating transformer.
This alternating current machine electricity-saving appliance also wraps suitable operation display unit, suitable display screen of this operation display unit bag and keyboard, and the two all communicates with controller.Be convenient to operation.
The utility model alternating current machine power-saving method and corresponding alternating current machine electricity-saving appliance have the advantage that power savings is obvious, cost is low, are applicable to various alternating current machines, are specially adapted to the big motor of the fluctuation of load.
Description of drawings
Fig. 1 is the economize on electricity block diagram of this alternating current machine electricity-saving appliance;
Principle of equal effects schematic diagram (not containing bypass) when Fig. 2 uses for this alternating current machine electricity-saving appliance;
Fig. 3 is the circuit diagram (being used for the low voltage motor system) of this alternating current machine electricity-saving appliance execution mode one;
Fig. 4 is the circuit diagram (being used for the high-voltage motor system) of this alternating current machine electricity-saving appliance execution mode two;
Fig. 5 is the circuit diagram (electric system that is used for pressure regulation significantly) of this alternating current machine electricity-saving appliance execution mode three;
Fig. 6 is the concrete connected mode schematic diagram of voltage controller power source transformer GB and solid-state relay matrix unit SSR matrix among Fig. 4.
Wherein: BZ is that autotransformer, BL are that isolating transformer, TY are that voltage controller power source transformer, SSR are that solid-state relay matrix unit, ZM are that motor, KZ are that controller, OP are operation display unit, CT
SBe current of electric instrument transformer, J
1Be breaker bypasses switch, J
2Be main road relay switch, CT
PBe by-pass current instrument transformer, L
1, L
2Be respectively the potential winding of autotransformer BZ and current coil, L '
1Be primary coil, L '
2For secondary coil, UT are that voltage transformer, L are power supply U
1Input terminal, Δ U are regulation and control voltage amplitude, U
0Operating voltage, U for motor ZM
iFor supply voltage, Im are motor stator exciting current, Ir
0Be rotor current, the r that converts stator side
iBe motor stator side copper loss, X
iBe coil of stator of motor induction reactance, r
mBe motor stator side iron loss, X
mBe coil of stator of motor excitation reactance, r '
0Be copper loss of rotor, the X ' that converts stator side
0Be the rotor coil induction reactance of converting stator side, [(1-S)/S] r '
0The meritorious impedance of load, the S that converts stator side for rotor is that revolutional slip, the C between electromagnetism rotating magnetic field rotating speed and rotor actual speed is that load precompensation capacitor, N are zero-power line, L
GFor SSR is common wire, the L that solid-state relay connects
HThe cable that is merged into for the holding wire between each solid-state relay and the controller.
Embodiment
Below in conjunction with accompanying drawing the utility model alternating current machine electricity-saving appliance is described further:
As shown in Figure 1, the utility model alternating current machine electricity-saving appliance power-saving method comes down to: after motor ZM starts, be no more than rated current, voltage and do not changing under the preceding topic of current waveform, continuing to adjust motor ZM operating voltage U
0, and be foundation with the electric current of load motor ZM or resistive torque or change in rotational speed, constantly revise the adjusting range of motor ZM operating voltage, with load variations, in time adjust the operating voltage U of motor ZM
0, power supply as required.
Execution mode one: shown in Fig. 2,3, the utility model alternating current machine electricity-saving appliance comprises pressure regulation unit and controller KZ, and this pressure regulation unit comprises voltage controller power source transformer TY and autotransformer BZ, wherein, and the current coil L of autotransformer BZ
2Be serially connected between power input L and the load motor ZM, form major loop, the primary coil L ' of voltage controller power source transformer TY
1Be connected across between power input L and the zero-power line end N its secondary coil L '
2Be provided with a plurality of taps, each tap is connected to a relay switch, the potential winding L of another termination autotransformer BZ of above-mentioned relay switch
1An end, this potential winding L
1The other end be connected between power input L and the load motor ZM, it is characterized in that: it also comprises the load-transducing unit, this load-transducing unit comprises the motor load transducer that is used to monitor motor ZM load variations, and this motor load transducer is current of electric instrument transformer CT
S, and communicate with the signal output part of described controller KZ.Described relay switch is a solid-state relay, and above-mentioned solid-state relay forms solid-state relay matrix unit SSR.Described potential winding L
1With a major loop relay switch J
2Be connected into the part of major loop mutually, and be furnished with bypass, this bypass is provided with bypass relay switch J
1Also be provided with by-pass current instrument transformer CT in the described bypass
P, this by-pass current instrument transformer CT
PConnect the pilot signal input of controller KZ.
In Fig. 3, AC power U
iCome from itself by deducting one, do not change its waveform shape and frequency by controller KZ according to current of electric instrument transformer CT
SThe output current i of the present utility model that is transmitted
0, the input current I of motor just
iThe magnitude of voltage Δ U that size determined, be applied to motor ZM{ and comprise: r
i, X
i, r
m, X
m, r '
0, X '
0, [(1-S)/and S] r '
0On.Be not added into any signal source that can produce interference effect on the motor main circuit.When the mechanical load of motor ZM strengthens suddenly, according to the electromagnetic balance theory of motor ZM, electromagnetic torque will take place unbalance, and rotor is converted meritorious impedance ((1-S)/S) r ' of load of stator side
0Reduce, convert the rotor current Ir of stator side
0Effective value also can strengthen suddenly, directly cause the input current I of motor ZM
iEffective value increase, controller KZ will adjust immediately and reduce to control voltage Δ U this moment, so that motor ZM in time obtains the needed bigger magnitude of voltage U of load
0=U
i-Δ U, at this moment load precompensation capacitor C can compensate because of I
0Increasing and motor operating voltage U
0The required capacity current of circuit that brings of raising.On the contrary, when the load of motor ZM was lighter, controller KZ then can be according to electric current I
iStability constantly attempt increasing gradually Δ U, promptly reduce to supply with the operating voltage U of motor
0, up to I
iThe stable and instability of mean effective value convergence between dynamic equilibrium.If motor ZM is under the three phase mains, what autotransformer electricity BZ selected for use is three-phase transformer, its potential winding L
1And current coil L
2Potential winding L with other two-phase
1, current coil L
2Be in three separately above the core limb, flux circuit each other has the big induction reactance to peak voltage and high-frequency current composition that self-induction, mutual inductance form, and the algebraical sum of following the three-phase magnetic flux is always zero the natural law.Therefore, this alternating current machine electricity-saving appliance has three-phase imbalance, high order harmonic component, peak voltage, the surge current effect that suppresses to come from power end L, in addition, and because of Δ U and input voltage U
iAnti-phase (phase difference is 180 °), Δ U can be at current coil L
2On generate that to relatively lag behind in 90 ° of Δ U (be leading input voltage U
i90 °) electric current to resist input current I
iIn inductance current, so, the utlity model has the effect of instantaneous raising motor power factor;
Where necessary, this alternating current machine electricity-saving appliance can also wrap suitable operation display unit OP, and wherein the operation display unit bag is fitted display screen and keyboard, and the two all communicates with controller KZ.Make Δ U equal at 0 o'clock at controller KZ, relay switch J
1Closure, J
2Disconnect, the autotransformer BZ in the utility model just can withdraw from and break away from and move connection by bypass under the situation of not interrupt load motor ZM power supply supply at this moment.
Execution mode two: shown in Fig. 2,4,6, the utility model alternating current machine electricity-saving appliance comprises pressure regulation unit and controller KZ, and this pressure regulation unit comprises voltage controller power source transformer TY, isolating transformer BL, wherein, and the primary coil L ' of described voltage controller power source transformer TY
1Be connected across between power input L and the zero-power line end N its L '
2Secondary coil is provided with a plurality of taps, the first polar curve circle L ' of one of them tap and isolating transformer BL
1An end join, each remaining tap by separately relay switch and the first polar curve circle L ' of isolating transformer BL
1The other end join; The signal input part of each relay switch communicates the secondary coil L ' of described isolating transformer BL with the corresponding signal output part of controller KZ
2Be serially connected between power input L and the load motor ZM, form major loop, it is characterized in that: it also comprises the load-transducing unit, and this load-transducing unit comprises the motor load transducer CT that is used to monitor the motor load variation
S, this motor load transducer CT
SCommunicate with the signal output part of described controller.
Described secondary coil L '
2With a major loop relay switch J
2Be connected into the part of major loop mutually, and be furnished with bypass, this bypass is provided with bypass relay switch J
1Also be provided with by-pass current instrument transformer CT in the described bypass
P, this by-pass current instrument transformer CT
PConnect the pilot signal input of controller.
The main distinction of execution mode one, two is: the former selects autotransformer BZ for use, is applicable to the motor ZM that operating voltage is lower, and the latter selects isolating transformer BL for use, is applicable to the motor ZM that operating voltage is higher.
Execution mode three: as shown in Figure 5, the pressure regulation unit of this alternating current machine electricity-saving appliance comprises N isolating transformer BL, the secondary coil L ' of above-mentioned isolating transformer BL
2Be connected on successively in the major loop, wherein N is any positive integer.Other structures are as described in the enforcement mode two.
Above-mentioned three kinds of execution modes are all with current of electric instrument transformer CT
SBe load cell, in use, after motor ZM started, concrete steps were as follows:
(1), sets step-down amplitude, ao U value;
(2), by the step-down amplitude, ao U that configures, reduce the operating voltage U of motor ZM
0=U
i-Δ U, wherein U
iBe supply voltage;
(3), after voltage adjusts, Δ U value is adjusted in the variation of root a tree name load:
With the motor working current is foundation, according to its variation, presses following situation differentiated treatment:
A, when the electric current recruitment greater than, when equaling predetermined amplification or being higher than rated current, the operating voltage U of rising motor ZM
0No longer increase and, return step (), (two) until the operating current of motor ZM, begin to reduce the operating voltage U of motor ZM once more less than rated current
0
B, when the electric current recruitment less than predetermined amplification, and during less than rated current, get back to step (), set a littler Δ U, U begins with this Δ, reduces the operating voltage U of motor ZM once more
0
C, when the electric current recruitment is 0 or is close to a certain degree with rated current, keep Δ U constant, stablize the operating voltage U of motor ZM
0, further monitor current changes simultaneously;
D, when the electric current reduction for greater than, when equaling predetermined amount of decrease, get back to step (), set a bigger Δ U, begin with this Δ U, reduce the operating voltage U of motor ZM once more
0
Certain described load cell also can be the combination of torque sensor and transmitter, or the combination of speed probe and transmitter.
If with the load cell that is combined as of torque sensor and transmitter, big more according to resistive torque during establishment controller function program guaranteeing that electric current is not higher than under the preceding topic of rated current, the operating voltage U of motor ZM
0Big more relation is set up resistive torque and operating voltage U
0The database of one-to-one relationship.After above-mentioned (one), (two) step, contrast is as the resistive torque of front motor ZM and the operating voltage U of motor ZM
0Whether meet above-mentioned one-to-one relationship and judge, and (one) sets a new Δ U to get back to step in view of the above, begin next pressure regulation circulation.
Because resistive torque is the direct embodiment of motor ZM load, if the resistive torque transducer is enough sensitive, motor ZM load increases sharply or when falling sharply, can set the bigger Δ U of absolute value, can also be negative value (when Δ U is negative value, the operating voltage U of motor ZM
0Equal supply voltage U
iAdd this Δ U absolute value on the basis), to the operating voltage U of motor ZM
0Adjusting settles at one go.Figure slightly!
If with the load cell that is combined as of speed probe and transmitter, press following situation differentiated treatment:
A, when the rotating speed recruitment greater than, equal predetermined amplification, when perhaps being higher than rated speed, sets a bigger Δ U, the operating voltage U of reduction motor ZM
0, no longer increase and, return step () until rotating speed less than rated speed, set a littler Δ U, U begins with this Δ, reduces the operating voltage U of motor ZM once more
0
B, when the rotating speed recruitment less than predetermined amplification, and during less than rated speed, get back to step (), set a littler positive value delta U, U begins with this Δ, reduces the operating voltage U of motor ZM once more
0
C, when the rotating speed recruitment is 0 or is close to a certain degree with rated speed, keep Δ U constant, stablize the operating voltage U of motor ZM
0, further monitoring rotation speed changes simultaneously;
D, when the rotating speed reduction greater than, when equaling predetermined amount of decrease, get back to the operating voltage U of step () rising motor ZM
0No longer reduce until motor ZM rotating speed, return step (), (two), begin to reduce the operating voltage U of motor ZM once more
0Figure slightly!
Claims (8)
1. alternating current machine electricity-saving appliance, comprise pressure regulation unit and controller, it is characterized in that: it also comprises the load-transducing unit, and this load-transducing unit comprises and be used to monitor the motor load transducer that motor load changes that this motor load transducer communicates with the signal output part of described controller.
2. alternating current machine electricity-saving appliance according to claim 1, it is characterized in that: described pressure regulation unit comprises voltage controller power source transformer and autotransformer, wherein, the current coil of autotransformer is serially connected between power input and the load motor, form major loop, the primary coil of voltage controller power source transformer is connected across between power input and the zero-power line end, its secondary coil is provided with a plurality of taps, each tap is connected to a relay switch, one end of the potential winding of another termination autotransformer of above-mentioned relay switch, the other end of this potential winding is connected between power input and the load motor.
3. alternating current machine electricity-saving appliance according to claim 1, it is characterized in that: described pressure regulation unit comprises voltage controller power source transformer, isolating transformer, wherein, the primary coil of described voltage controller power source transformer is connected across between power input and the zero-power line end, its secondary coil is provided with a plurality of taps, one end of the first polar curve circle of one of them tap and isolating transformer joins, each remaining tap by separately relay switch and the other end of the first polar curve circle of isolating transformer join; The signal input part of each relay switch communicates with the corresponding signal output part of controller, and the secondary coil of described isolating transformer is serially connected between power input and the load motor, forms major loop.
4. according to claim 2 or 3 described alternating current machine electricity-saving appliances, it is characterized in that: described load cell is the current of electric instrument transformer, and described relay switch is a solid-state relay, and above-mentioned solid-state relay forms the solid-state relay matrix unit.
5. according to claim 2 or 3 described alternating current machine electricity-saving appliances, it is characterized in that: described load cell comprises transmitter and speed probe or torque sensor, described relay switch is a solid-state relay, and above-mentioned solid-state relay forms the solid-state relay matrix unit.
6. alternating current machine electricity-saving appliance according to claim 4, it is characterized in that: the pressure regulation unit of this alternating current machine electricity-saving appliance comprises a plurality of isolating transformers or autotransformer, the secondary coil of above-mentioned isolating transformer, or the current coil of above-mentioned autotransformer is connected in the major loop successively.
7. alternating current machine electricity-saving appliance according to claim 6 is characterized in that: described secondary coil or potential winding and a major loop relay switch are connected into the part of major loop mutually, and are furnished with bypass, and this bypass is provided with the bypass relay switch.
8. alternating current machine electricity-saving appliance according to claim 7 is characterized in that: also be provided with the by-pass current instrument transformer in the described bypass, this by-pass current instrument transformer connects the pilot signal input of controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201498024U CN201078842Y (en) | 2006-05-08 | 2007-04-27 | Alternating current machine electricity economizer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620117305.1 | 2006-05-08 | ||
| CN200620117305 | 2006-05-08 | ||
| CNU2007201498024U CN201078842Y (en) | 2006-05-08 | 2007-04-27 | Alternating current machine electricity economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201078842Y true CN201078842Y (en) | 2008-06-25 |
Family
ID=39570908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201498024U Expired - Fee Related CN201078842Y (en) | 2006-05-08 | 2007-04-27 | Alternating current machine electricity economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201078842Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090252B (en) * | 2006-04-30 | 2011-06-15 | 梁忠民 | Electric saving method for AC motor and corresponding AC motor electric saver |
| CN102790585A (en) * | 2011-12-26 | 2012-11-21 | 盘锦恒岳科技有限公司 | Initiative working condition detecting power-saving method |
| CN103684174A (en) * | 2013-12-11 | 2014-03-26 | 中冶南方（武汉）自动化有限公司 | Automatic energy-saving method of asynchronous motor |
| CN103986401A (en) * | 2014-06-03 | 2014-08-13 | 上海电机学院 | Automatic-control energy-saving system and method of induction motor |
| CN107769664A (en) * | 2017-10-31 | 2018-03-06 | 哈尔滨兴亚技术有限公司 | A kind of drive electrical equipment with adjusting zero point type isolating transformer |
-
2007
- 2007-04-27 CN CNU2007201498024U patent/CN201078842Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090252B (en) * | 2006-04-30 | 2011-06-15 | 梁忠民 | Electric saving method for AC motor and corresponding AC motor electric saver |
| CN102790585A (en) * | 2011-12-26 | 2012-11-21 | 盘锦恒岳科技有限公司 | Initiative working condition detecting power-saving method |
| CN103684174A (en) * | 2013-12-11 | 2014-03-26 | 中冶南方（武汉）自动化有限公司 | Automatic energy-saving method of asynchronous motor |
| CN103684174B (en) * | 2013-12-11 | 2016-03-16 | 中冶南方（武汉）自动化有限公司 | A kind of method of asynchronous machine automatic energy saving |
| CN103986401A (en) * | 2014-06-03 | 2014-08-13 | 上海电机学院 | Automatic-control energy-saving system and method of induction motor |
| CN107769664A (en) * | 2017-10-31 | 2018-03-06 | 哈尔滨兴亚技术有限公司 | A kind of drive electrical equipment with adjusting zero point type isolating transformer |
| CN107769664B (en) * | 2017-10-31 | 2023-12-22 | 哈尔滨泾铎技术有限公司 | Driver with adjustable zero point type isolation transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101090252B (en) | Electric saving method for AC motor and corresponding AC motor electric saver | |
| CN201078842Y (en) | Alternating current machine electricity economizer | |
| CN100468908C (en) | Rotary electromagnetic type uniform tidal current controller | |
| CN102116850B (en) | Device and method for testing rectifier | |
| CN103731011B (en) | A kind of highly reliable constant current for highway remote power-feeding turns constant-voltage equipment | |
| CN210051827U (en) | High-power frequency converter test system | |
| CN103124159A (en) | Alternating current dynamo electricity saving control method and dynamo electricity saving device implementing method | |
| CN112888092B (en) | Low-frequency heating device of high-capacity power transformer | |
| CN101509498B (en) | Method for optimizing operating parameter of frequency control drive system of direct air cooling blower fan | |
| CN100384082C (en) | Method and apparatus for controlling AC induction motor energy-saving operation | |
| CN201328095Y (en) | Mineral flame-proof type variable-frequency high-voltage soft start device | |
| CN203720692U (en) | Compensation circuit for 380 V high-capacity stabilized voltage supply | |
| CN201134675Y (en) | Bidirectional energy feedback series type active filter | |
| CN207339662U (en) | One kind is used for highway power supply and distribution source power cabinet | |
| CN202121546U (en) | Digitalized frequency converter control system device | |
| CN2138858Y (en) | Full direction protective economic operation controller of motor | |
| CN203871944U (en) | Motor with additional inductance coil | |
| CN103944458A (en) | Dynamic braking method and device | |
| CN103066917B (en) | A kind of tandem control method of wire wound asynchronous motor | |
| CN1121751C (en) | Current-type chopper with self-excited thyristor | |
| CN219659438U (en) | Inverter rectification dynamic parallel regulating device | |
| CN209088853U (en) | The magnetic control energy saver of pumping unit | |
| CN107612014A (en) | A kind of converter Control method | |
| CN202127381U (en) | Excitation device for synchro generator | |
| CN201774500U (en) | All-digital silicon-controlled sub-synchronous double-fed frequency conversion device of mine winder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20080625 Termination date: 20120427 |