CN100458637C - Low harmonic current power regulating method and apparatus - Google Patents
Low harmonic current power regulating method and apparatus Download PDFInfo
- Publication number
- CN100458637C CN100458637C CNB2005100389858A CN200510038985A CN100458637C CN 100458637 C CN100458637 C CN 100458637C CN B2005100389858 A CNB2005100389858 A CN B2005100389858A CN 200510038985 A CN200510038985 A CN 200510038985A CN 100458637 C CN100458637 C CN 100458637C
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- Prior art keywords
- circuit
- electronic switch
- current
- power
- harmonic current
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- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/1555—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only for the generation of a regulated current to a load whose impedance is substantially inductive
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a low-harmonic current power regulating method, making full wave rectification on the power supply, using a square wave signal to control the on/off of an electronic switch; the on position of the electronic switch is before the zero passage point of an one-way pulsating voltage, the off position of the electronic switch is used to regulate the power of the circuit, a current sustaining circuit is provided at the off point of a control circuit, the current sustaining circuit contains storage component to the falling edge of the current of the power supply become smooth. The invention also discloses a device adopting the method. In the course of regulating the power of an electrical appliance, it makes the harmonic component of the current that the electric appliance absorbs from the power supply be small in each half-wave, really avoiding the production of the harmonic current in the circuit; besides, the circuit structure is simple and energy-saving, and the current waveform is so smooth as to have no bad effect on the electric network.
Description
Technical field
The present invention relates to a kind of power regulating method, and the power adjustment apparatus that adopts this method, be specifically related to a kind of low harmonic current, meet the power regulating method and the device thereof of electromagnetic compatibility requirement.
Background technology
Electrical appliance is carried out the power adjustment, is the requirement that realizes the functions of use of electrical appliance, also can play the economize on electricity effect.Adopt the frequency converter of pulse modulation technology to be used to heavy-duty motor speed governing and large power, electrically source apparatus, be subjected to people's welcome.Yet,, on the electric heating appliance of the cheap relatively domestic vacuum cleaners of price, electric tool and higher-wattage, generally adopt the bidirectional triode thyristor technology to carry out the power adjustment at present for the consideration of cost.These class domestic vacuum cleaners and electric tool adopt series excited machine usually, accompanying drawing 1 is a kind of simple controllable silicon power adjusting circuit in the prior art, after the energized, circuit charges to capacitor C 1 by potentiometer RW, when the voltage to electric capacity reached the voltage breakdown of bilateral diode D1, bilateral diode D1 produced negative resistance effect, made bidirectional triode thyristor T conducting thereby capacitor C 1 discharge forms current i G, electrical equipment Z obtains current i Z, and the value of regulator potentiometer RW can change φ
0Thereby, the conduction angle φ of change bidirectional triode thyristor
1, accompanying drawing 2 has provided the oscillogram of this circuit.Adopt the method for technique scheme to adjust appliance power, though method is simple, but work as the instantaneous of controllable silicon conducting, the rising edge of current i Z is very steep, thereby has produced abundant harmonic current, Theoretical Calculation and actual measurement are all provable, supply voltage when 230V, when the power of electrical equipment during in the 1200W left and right sides, the harmonic current that this control method produces, particularly the triple harmonic current value will at first surpass European specified standard (2.3A), thereby the EMC performance of electrical equipment is above standard.
For solving the bigger problem of harmonic current in the said method, proposed a kind of adjacent wave that allows and used different conduction angle, thereby made adjacent wave not reach the maximal value of harmonic wave at the same time, and then reached the purpose that reduces average harmonic current in the whole waveform.Accompanying drawing 3 has provided a kind of way of realization of this method, and accompanying drawing 4 is its corresponding oscillograms.
Can see from accompanying drawing 3, compare with accompanying drawing 1 that it is at current potential RW two ends, and connect the resistance R 2 that a string has electronic switch K1, this electronic switch K1 is subjected to frequency f
1=1/2 f
0Waveform Control, promptly connect, and disconnect in its adjacent periods at one-period.When K1 disconnects, timeconstant
A=RWC1 is corresponding to conduction angle φ
1A, when K1 connects, timeconstant
B=(RW//R2) C1 is corresponding to big conduction angle φ
1B, as can be seen, 1. because adjacent wave can not reach the harmonic current maximal value simultaneously, the mean value of harmonic current has reduced in this method; 2. owing to varying in size, the adjacent current ripple produced a f
Attached=1/2 f
0Bat or claim additional frequency, f
AttachedHave near a little sudden strain of a muscle of illuminating lamp that may cause the influence of electrical network made the controlled electric appliance, simultaneously, when the control motor, controlled motor can produce one 1/2 f
0Shake, the usability variation.
In the said method, all be to adopt controllable silicon as on-off element, reach the purpose that power is adjusted with control silicon controlled conduction angle, controllable silicon conducting instantaneous, its electric current rising edge is extremely steep, thereby has produced very big harmonic current, if will reduce harmonic current, rising edge is become tiltedly, is big inductance of series connection in main circuit and will make this rising edge become oblique straightforward procedure.Yet for the electrical equipment more than one kilowatt, this big inductance all is unacceptable on volume, weight, price, thermal value, the reactive power that produced, that is to say that this scheme is infeasible.
Therefore, can not just finely tune circuit, and need change from method of adjustment, it is lower and realize simple power regulating method to seek a kind of harmonic current, is used on domestic vacuum cleaners, electric tool and the electric heating appliance to substitute prior art.
Summary of the invention
The object of the invention provides a kind of method that electrical equipment is carried out the power adjustment, solves the too high problem of harmonic current, avoids simultaneously electrical network and controlled electric appliance are produced other harmful effect.
Another object of the present invention provides a kind of this method that adopts and realizes the device that appliance power is adjusted.
For reaching above-mentioned first purpose, the technical solution used in the present invention is: a kind of power regulating method of low harmonic current comprises:
(1) be a unidirectional pulsating volage with an AC voltage conversion;
(2) series connection inserts an electronic switch in output circuit;
(3) provide a square-wave signal to be used to control the break-make of electronic switch, the make-position of described electronic switch is before the zero crossing of unidirectional pulsating volage, and the open position of electronic switch is used to adjust the power of circuit;
(4) provide a freewheeling circuit at the pass of control circuit breakpoint, contain energy-storage travelling wave tube in the freewheeling circuit, the negative edge of power supply supply current is slowed down.
In the technique scheme, should be connected with discharge circuit on the energy-storage travelling wave tube in the described freewheeling circuit, prepare afterflow next time so that finish discharge, discharge circuit can be the independent circuit that is connected in parallel on the energy-storage travelling wave tube, yet, be the raising power consumption efficiency, and be convenient to the circuit realization, further technical scheme is that the energy-storage travelling wave tube in the described freewheeling circuit discharges by controlled electric appliance when electronic switch closes.
In the technique scheme, set the make-position of described electronic switch, when making unidirectional pulsating volage zero crossing, energy-storage travelling wave tube is finished discharge.
In the technique scheme, the negative edge of choosing supply current when making afterflow of described energy-storage travelling wave tube is more slow, satisfies the requirement of circuit to harmonic current.
For realizing another object of the present invention, the technical scheme that adopts is, a kind of power adjustment apparatus of low harmonic current, comprise bridge rectifier circuit, be series at the controllable electronic switch between electrical equipment and the bridge rectifier circuit output terminal, also be in series with freewheeling circuit between described bridge rectifier circuit and the electrical appliance, include electric capacity in the freewheeling circuit, be connected with discharge circuit on the electric capacity.
Further technical scheme, described freewheeling circuit comprises the fly-wheel diode and the electrochemical capacitor of series connection, the backward end of fly-wheel diode is connected with the positive pole of electrochemical capacitor, described discharge circuit is and the anodal discharge diode that is connected of electrochemical capacitor, the backward end of discharge diode is connected to the other end of electrical equipment, makes discharge current through electrical equipment.
In the technique scheme, the generation of described " electronic switch " and control waveform thereof is a prior art.For example, can utilize the MOSFET pipe as electronic switch, control signal can adopt integrated circuit or mimic channel to make up wave generator circuit, also can adopt single chip circuit, the rising edge time of control signal is adjusted when dispatching from the factory and determines, the negative edge time is adopted the regulator potentiometer adjustment, realizes power control.Electronic switching element of the prior art comprises, bipolar transistor; Power field effect pipe MOSFET; Insulated gate bipolar transistor IGBT; Turn-off SCR GTO.
Principle of work of the present invention is: adopt the closure and the disconnection of a square wave control electronic switch, when each half-wave began, electronic switch is conducting, at this moment, the circuit supply waveform is sine-shaped leading portion, according to the needs of power control, a certain angle at half-wave is turn-offed electronic switch, at this moment, circuit continues power supply, the energy-storage travelling wave tube charging in freewheeling circuit, the decline of current waveform is more slow, when charging was finished, power supply did not have electric current output, waits for next turn-on cycle.Before next zero crossing, energy-storage travelling wave tube should be finished discharge operation.In above-mentioned further technical scheme, electronic switch can be early than the zero crossing conducting, at this moment, energy-storage travelling wave tube (electric capacity) constitutes the loop by discharge circuit, electrical equipment, electronic switch and discharges, because the voltage on the energy-storage travelling wave tube is higher than power input voltage, does not have electric current output in the power supply, usually, need to adjust the ON time of electronic switch, make discharge when the power supply wave shape zero crossing, just in time finish, to obtain preferable performance.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. the present invention adopts opposition thinking, utilize preceding half section of waveform running current is provided, make preceding half section of waveform to be a sine-shaped part, and be provided with freewheeling circuit, when turn-offing, waveform utilize freewheeling circuit that the electric current negative edge is become gently, thereby, in the process that appliance power is adjusted, the harmonic component of the electric current that electrical equipment is drawn from power supply in each half-wave is less, the generation that has truly solved the circuit harmonizing wave electric current;
2. the present invention further turns back to electrical equipment with energy stored in the freewheeling circuit by discharge circuit, both reduced the cost of discharge circuit, improved capacity usage ratio again, realized energy-conservation, simultaneously, because the control energy-storage travelling wave tube is higher than electric power output voltage all the time at the voltage of discharge regime, power supply does not have electric current output when having guaranteed discharge, make current waveform steady, electrical network is not had harmful effect.
Description of drawings
Accompanying drawing 1 is a kind of circuit theory diagrams of prior art;
Accompanying drawing 3 is the circuit theory diagrams of another kind of prior art;
Accompanying drawing 4 is voltage, the current waveform synoptic diagram of reference point among Fig. 3;
Accompanying drawing 5 is the circuit theory diagrams of the embodiment of the invention one;
Accompanying drawing 6 is voltage, the current waveform synoptic diagram of reference point among Fig. 5;
Accompanying drawing 7 is the circuit theory synoptic diagram of the embodiment of the invention two;
Accompanying drawing 8 is the circuit theory synoptic diagram of the embodiment of the invention three.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: shown in accompanying drawing 5 and accompanying drawing 6, a kind of power adjustment apparatus of low harmonic current, comprise bridge rectifier circuit, be series at the controllable electronic switch between electrical equipment Z and the bridge rectifier circuit output terminal, the control end of controllable electronic switch connects square-wave signal generation circuit, also be in series with freewheeling circuit between the output terminal of described bridge rectifier circuit and the electrical equipment, described freewheeling circuit mainly is made of the fly-wheel diode and the electrochemical capacitor of series connection, be connected with discharge circuit on the electric capacity, the backward end of fly-wheel diode is connected with the positive pole of electrochemical capacitor, described discharge circuit is and the anodal discharge diode that is connected of electrochemical capacitor, the backward end of discharge diode is connected to the other end of electrical equipment, makes discharge current through electrical equipment.
The power regulating method that present embodiment adopts is:
(1) by bridge rectifier circuit an alternating voltage is carried out full-wave rectification and be transformed to a unidirectional pulsating volage;
(2) in circuit, insert an electronic switch;
(3) provide a square-wave signal to be used to control the break-make of electronic switch, the make-position of described electronic switch is before the zero crossing of unidirectional pulsating volage, and the open position of electronic switch is used to adjust the power of circuit;
(4) provide a freewheeling circuit at the pass of control circuit breakpoint, contain the energy-storage travelling wave tube that electrochemical capacitor constitutes in the freewheeling circuit, the negative edge of power supply supply current is slowed down, energy-storage travelling wave tube can discharge to electrical equipment by discharge circuit.
In the starting point (zero crossing) of each half-wave, electronic switch is in conducting state, and the output terminal of bridge rectifier circuit, electrical equipment and electronic switch constitute the loop, and power supply is to electric power supply; After electronic switch disconnected, power supply charged to electrochemical capacitor through electrical equipment, fly-wheel diode, constituted continuous current circuit, made former should becoming gently by very steep electric current negative edge, as the I of accompanying drawing 6
iShown in, thereby reduced significantly from the harmonic wave of the electric current of power supply absorption.The a certain moment before this half-wave zero passage, electronic switch is opened conducting, at this moment, voltage on the electrochemical capacitor is higher than the output voltage of power supply, electrochemical capacitor constitutes the discharge loop discharge by discharge diode, electrical equipment, electronic switch, for electrical equipment, discharge current also is a part of working current, improve energy utilization rate, and concerning power supply, because the voltage on the electrochemical capacitor is higher than the output voltage of rectification circuit, power supply does not have electric current output, therefore, the waveform of discharge current can not influence the harmonic current value of electrical network.
Embodiment two: shown in accompanying drawing 7, a kind of power adjustment apparatus of low harmonic current, be used for the power adjustment of motor, comprise bridge rectifier circuit, be series at the controllable electronic switch between motor M and the bridge rectifier circuit output terminal, the control end of controllable electronic switch connects square-wave signal generation circuit, also be in series with freewheeling circuit between the output terminal of described bridge rectifier circuit and the motor, described freewheeling circuit mainly is made of the sustained diode 1 and the electrochemical capacitor C1 of series connection, be connected with discharge circuit on the capacitor C 1, the backward end of sustained diode 1 is connected with the positive pole of electrochemical capacitor C1, described discharge circuit is and the anodal discharge diode D2 that is connected of electrochemical capacitor C1, the backward end of discharge diode D2 is connected to the other end of motor M, makes discharge current through motor.
Controllable electronic switch in the present embodiment is made of the insulated gate bipolar transistor IGBT circuit, the driving of IGBT is provided by a pair of triode T1, T2, the base stage place of triode connects square-wave signal UQ, square-wave signal generation circuit can adopt arbitrary existing techniques in realizing, for example, adopt d type flip flop to constitute.
Embodiment three: shown in accompanying drawing 8, a kind of power adjustment apparatus of low harmonic current, be used for the power adjustment of motor of dust collector, comprise bridge rectifier circuit, be series at the controllable electronic switch between motor M and the bridge rectifier circuit output terminal, the control end of controllable electronic switch connects square-wave signal generation circuit, also be in series with freewheeling circuit between the output terminal of described bridge rectifier circuit and the motor, described freewheeling circuit mainly is made of the sustained diode 1 and the electrochemical capacitor C1 of series connection, be connected with discharge circuit on the capacitor C 1, the backward end of sustained diode 1 is connected with the positive pole of electrochemical capacitor C1, described discharge circuit is and the anodal discharge diode D2 that is connected of electrochemical capacitor C1, the backward end of discharge diode D2 is connected to the other end of motor M, makes discharge current through motor.
Controllable electronic switch in the present embodiment is made of turn-off SCR GTO circuit, the driving of GTO is provided by a pair of triode T1, T2, and the base stage place of triode connects square-wave signal UQ, and square-wave signal generation circuit can adopt arbitrary existing techniques in realizing, for example, adopt single chip circuit to constitute.The last terminal voltage of driving tube is+6 volts, and following terminal voltage is-12V, thereby can realize closure and the disconnection of GTO.
Claims (6)
1. the power regulating method of a low harmonic current comprises:
(1) alternating voltage is carried out full-wave rectification and be transformed to a unidirectional pulsating volage;
(2) series connection inserts an electronic switch in output circuit;
(3) provide a square-wave signal to be used to control the break-make of electronic switch; It is characterized in that: described electronic switch is closed before the zero crossing of unidirectional pulsating volage, adjusts the power of circuit constantly by the disconnection of adjusting electronic switch, also comprises:
(4) be connected in parallel on a freewheeling circuit is set in the output circuit with described electronic switch, contain energy-storage travelling wave tube in the freewheeling circuit, the negative edge of power supply supply current is slowed down.
2. the power regulating method of low harmonic current according to claim 1, it is characterized in that: the energy-storage travelling wave tube in the described freewheeling circuit discharges by controlled electric appliance when electronic switch closes.
3. the power regulating method of low harmonic current according to claim 2 is characterized in that: set the closing moment of described electronic switch, when making unidirectional pulsating volage zero crossing, energy-storage travelling wave tube is finished discharge.
4. the power regulating method of low harmonic current according to claim 2, it is characterized in that: the negative edge of choosing supply current when making afterflow of described energy-storage travelling wave tube is more slow, satisfies the requirement of circuit to harmonic current.
5. the power adjustment apparatus of a low harmonic current, comprise the controllable electronic switch between bridge rectifier circuit, sub-series electrical equipment and the bridge rectifier circuit output terminal, it is characterized in that: also be in series with freewheeling circuit between described bridge rectifier circuit output terminal and the electrical equipment, include electric capacity in the freewheeling circuit, be connected with discharge circuit on the electric capacity, described freewheeling circuit is in parallel with described electronic switch.
6. the power adjustment apparatus of low harmonic current according to claim 5, it is characterized in that: described freewheeling circuit comprises the fly-wheel diode and the electrochemical capacitor of series connection, the backward end of fly-wheel diode is connected with the positive pole of electrochemical capacitor, described discharge circuit is and the anodal discharge diode that is connected of electrochemical capacitor, the backward end of discharge diode is connected to the other end of electrical equipment, makes discharge current through electrical equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100389858A CN100458637C (en) | 2005-04-18 | 2005-04-18 | Low harmonic current power regulating method and apparatus |
| PCT/CN2006/000692 WO2006111074A1 (en) | 2005-04-18 | 2006-04-17 | Low harmonic current power regulating method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100389858A CN100458637C (en) | 2005-04-18 | 2005-04-18 | Low harmonic current power regulating method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1687857A CN1687857A (en) | 2005-10-26 |
| CN100458637C true CN100458637C (en) | 2009-02-04 |
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ID=35305899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100389858A Expired - Fee Related CN100458637C (en) | 2005-04-18 | 2005-04-18 | Low harmonic current power regulating method and apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100458637C (en) |
| WO (1) | WO2006111074A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5457927B2 (en) * | 2010-04-23 | 2014-04-02 | セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー | Light emitting element control circuit |
| CN106843364A (en) * | 2015-12-07 | 2017-06-13 | 尔高拜奥尼克有限公司 | The method and apparatus of the Power Control of electric ohm load for being run with alternating voltage |
| CN110926037A (en) * | 2019-12-12 | 2020-03-27 | 中山市上航电子有限公司 | Voltage regulation control method of high-power water heater compatible with EMC |
| CN115060972B (en) * | 2022-08-19 | 2022-11-29 | 深圳市今朝时代股份有限公司 | Harmonic detection method of super capacitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059054A (en) * | 1990-08-11 | 1992-02-26 | 宋声和 | Partially-filtered circuit |
| CN1122967A (en) * | 1994-11-08 | 1996-05-22 | 龚秋声 | Single phase and multiple phase non-zero base electronic voltage regulating circuit |
| US5714847A (en) * | 1993-10-27 | 1998-02-03 | Lighting Control, Inc. | Power regulator |
| DE10102124A1 (en) * | 2000-01-22 | 2001-07-26 | Juchheim Gmbh & Co M K | Power regulation method for low-ohmic heating resistance uses IGBT-module supplied with control frequency by regulation device dependent on current circuit parameters |
-
2005
- 2005-04-18 CN CNB2005100389858A patent/CN100458637C/en not_active Expired - Fee Related
-
2006
- 2006-04-17 WO PCT/CN2006/000692 patent/WO2006111074A1/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059054A (en) * | 1990-08-11 | 1992-02-26 | 宋声和 | Partially-filtered circuit |
| US5714847A (en) * | 1993-10-27 | 1998-02-03 | Lighting Control, Inc. | Power regulator |
| CN1122967A (en) * | 1994-11-08 | 1996-05-22 | 龚秋声 | Single phase and multiple phase non-zero base electronic voltage regulating circuit |
| DE10102124A1 (en) * | 2000-01-22 | 2001-07-26 | Juchheim Gmbh & Co M K | Power regulation method for low-ohmic heating resistance uses IGBT-module supplied with control frequency by regulation device dependent on current circuit parameters |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006111074A1 (en) | 2006-10-26 |
| CN1687857A (en) | 2005-10-26 |
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