CN102810976A - Comprehensive power saver - Google Patents
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- CN102810976A CN102810976A CN2011101493286A CN201110149328A CN102810976A CN 102810976 A CN102810976 A CN 102810976A CN 2011101493286 A CN2011101493286 A CN 2011101493286A CN 201110149328 A CN201110149328 A CN 201110149328A CN 102810976 A CN102810976 A CN 102810976A
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Abstract
The invention discloses a comprehensive power saver which comprises a first operation contactor, a power saving control module, a second operation contactor and an output reactor. The power saving control module further comprises a central control unit, an input current sampling unit, an input voltage sampling unit, a rectifying unit, a power unit, an output current sampling unit, an output voltage sampling unit, a SPWM (sinusoidal pulse width modulation) control driving unit, a protection circuit, a power source unit, a PID (proportion integration differentiation) controller and a sensor, and the output reactor further comprises three inductive components. By the technical scheme, interferences caused by high harmonics and lower harmonics can be effectively restrained, filtered out and weakened, power factors of a system can be improved, output harmonics caused by adoption of uncontrollable rectification can be effectively weakened to enable comprehensive harmonics generated by the system in a power-saving state to be within an allowable range to reduce transmission current and loss of lines.
Description
Technical field
The present invention relates to the power-saving technique field, relate in particular to integration power saver.
Background technology
In industrial and agricultural production, centrifugal blower and water pump extensively adopt ac three-phase asynchronous motor as drive source, and the design capacity of necessary electromotor is bigger in reality.And motor moves under rated speed, for satisfying process requirements, mostly adopts the air door of control blower fan or the valve opening of water pump to regulate air quantity or flow.This moment, motor power factor and inefficiency caused the significant wastage of energy, utilized converter technique to regulate rotating speed of motor at present, thereby changed power input to a machine, made it to be in preferable efficient state.
But said method has also brought new outstanding problem; Structure and operation principle according to low voltage frequency converter; Because it adopts uncontrollable rectifier system, has a large amount of 5 times, 7 times, 11 inferior harmonics frequency components in its input current, electrical network and power consumption equipment generation are on every side seriously disturbed.The current way that generally adopts that addresses this problem is at frequency converter input series connection AC reactor and input filter, or passive type ground is being installed additional isolating transformer or filter apparatus by the power input of jamming equipment.Though having the fractional harmonic frequency component, these measures weaken or inhibitory action; But because filter apparatus and input AC reactor all are the finished product of buying on the market mostly; And the harmonic frequency that this filter apparatus is primarily aimed at more than the 1KHz just produces effect, for not effect of low-order harmonic.It is about about 50% that the input reactance device also only can reduce the low component of degree n n of former harmonic content, still comparatively serious to the interference of electrical network and system's power consumption equipment, suppresses the ability of harmonic wave and limited to.
Summary of the invention
The objective of the invention is to propose integration power saver; Can effectively suppress to weaken because of high order harmonic component and interference that low-order harmonic produced with filtering; Improve the system power factor; Effective weakening owing to adopt the output harmonic wave of uncontrollable rectifier generation, the comprehensive harmonic wave that makes system's generation under the electricity-saving state reduces the transmission current and the loss of circuit in allowed band.
For reaching this purpose, the present invention adopts following technical scheme:
Integration power saver; Comprise the first operation contactor, economize on electricity control module, second operation contactor and the out put reactor; The economize on electricity control module further comprises central control unit, input current sampling unit, input voltage sampling unit, rectification unit, power cell, output current sampling unit, output voltage sampling unit, SPWM control drive unit, protective circuit, power subsystem, PID controller and transducer; Out put reactor further comprises three inductance elements, wherein
The input of the first operation contactor is connected with three-phase alternating-current supply;
The input of economize on electricity control module is connected with the main contact of the first operation contactor;
The output of economize on electricity control module is connected with the three-phase alternating-current supply input of motor through the main contact of the second operation contactor, three inductance elements of out put reactor successively,
In the economize on electricity control module, the input current sampling unit is connected on the three-phase alternating-current supply distribution wire of input of economize on electricity control module, the electric current of the input that is used to sample, and the input current sampling end through central control unit feeds back to central location and handles;
The input voltage sampling unit is connected on the three-phase alternating-current supply distribution wire of input of economize on electricity control module, the voltage of the input that is used to sample, and the input voltage sampling end through central control unit feeds back to central location and handles;
Rectification unit is connected on the three-phase alternating-current supply distribution wire, is used for three-phase alternating-current supply is carried out exporting after the rectification;
The input of power cell is connected with one tunnel rectification output of rectification unit, and the output of power cell is the output of economize on electricity control module;
The output current sampling unit is connected on the distribution wire of output of economize on electricity control module, the electric current of the output that is used to sample, and the output current sampling end through central control unit feeds back to central location and handles;
The output voltage sampling unit is connected on the distribution wire of output of economize on electricity control module, the voltage of the output that is used to sample, and the output voltage sampling end through central control unit feeds back to central location and handles;
The input of protective circuit is connected with the frequency modulation control output of central control unit; The output of protective circuit is connected with the control input end of SPWM control drive unit; The control output end of SPWM control drive unit is connected with the control input end of power cell, is used for the power controlling unit and realizes frequency-converter power output;
The power subsystem input is connected with another road rectification output of rectification unit, and the power subsystem output is connected with the SPWM control drive unit with central control unit, is used to provide working power;
The signal input part of PID controller is connected with transducer; The signal output part of PID controller is connected with central control unit through the PID control input end of central control unit; Be used for the PID controller and system's real-time requirement signal of sensor acquisition feedback is sent to central control unit handle, realize the PID closed-loop control;
Central controller is used to realize frequency conversion power saving control.
The economize on electricity control module further comprises simulation speed governing unit and digital speed-control unit, and simulation speed governing unit is connected with central control unit respectively with the digital speed-control unit, is used to realize the speed governing of motor.
The economize on electricity control module further comprises the control terminal unit; The control terminal unit is provided with start-up control terminal, time-out control terminal, reseting controling end, multistage speed control system terminal and fault output control terminal; Connect with the corresponding control input end of central control unit, be used to realize the manual control of frequency conversion power saving.
The economize on electricity control module further comprises keyboard display unit and output frequency display unit; Keyboard display unit is connected with central control unit respectively with the output frequency display unit; Keyboard display unit is used to carry out system parameters to be set, and the output frequency display unit is used for showing in real time output frequency.
Comprise that also harmonic wave suppresses unit and filter unit; Harmonic wave suppresses the unit and further comprises three inductance elements; Filter unit further comprises three inductance elements and three capacity cells; Harmonic wave suppresses the unit and filter unit moves between contactor and the node control module input first; Harmonic wave suppresses unit be used to suppress the to economize on electricity above high order harmonic component of 1KHz of the feedback grid that control module produces, and the input of filter unit is connected with the output of harmonic wave inhibition unit, is used for filtering economize on electricity 5 times, 7 times and 11 low-order harmonics of control module input.
Also comprise the civil power by-pass unit, the civil power by-pass unit is connected across between the three-phase alternating-current supply input of three-phase alternating-current supply and motor, and the civil power by-pass unit further comprises bypass contactor, is used for when the economize on electricity control module breaks down, realizing the civil power bypass.
Harmonic wave suppresses three inductance elements of unit and three inductance elements of filter unit are integrated on the matrix pattern iron core.
Adopt technical scheme of the present invention, produced following technique effect:
1, the input of electricity-saving appliance installs high harmonic inhibition unit and low-order harmonic filter unit additional; Can be through the optimum organization of component parameters; Effectively suppress the interference that produced because of high order harmonic component and 5 times, 7 times, 11 inferior low-order harmonics with filtering weakening, and can improve the system power factor.
2, the economize on electricity control module adopts minimum harmonic wave SPWM control technology, effective weakening owing to the output harmonic wave that adopts uncontrollable rectifier to produce, thus the comprehensive harmonic wave that makes system's generation under the electricity-saving state reduces the transmission current and the loss of circuit in allowed band.
3, adopt frequency conversion control technique to realize soft start, the soft stop of blower fan or water pump, reduce impact electrical network and equipment.
4, overcome the lower problem of traditional frequency conversion governing system power factor, the system power factor is reached about 0.98, reduced consumption, further improved the utilization ratio of electric energy electric network reactive-load.
5, adopt the internal PID closed-loop control, system dynamics detects load state, real-time optimization adjustment power input to a machine, reach institute supplies promptly required, the purpose that realization is economized on electricity.
Description of drawings
Fig. 1 is the structural representation of integration power saver in the specific embodiment of the invention.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and through embodiment.
In the technical scheme of the present invention; The economize on electricity control module adopts minimum harmonic wave SPWM control technology; Set up Mathematical Modeling according to 5 times, 7 times, the mechanism of production of 11 inferior harmonic waves; And send control signal according to the program that model thus produces, through the conducting rule that the SPWM control drive unit is come switching device in the power controlling unit, initiatively suppress to weaken because the harmonic wave that adopts uncontrollable rectifier to produce.
Be provided with high harmonic inhibition unit and low-order harmonic filter unit at economize on electricity control module input; Through optimum organization to component parameters in reactance component parameter and the filtering device in the harmonic wave inhibition unit; Can be better 5 times, 7 times, 11 inferior low-order harmonics be suppressed and filtering, and can improve the power factor of input.
The economize on electricity control module adopts the internal PID closed-loop control, through voltage, current sensor real-time detecting system parameter, compares with set point; Its difference signal is transferred to central control unit after handling through the internal PID controller again; The real-time power adjustment signal that sends comes the power output of power controlling unit to motor by the SPWM control drive unit, reach supply promptly required; Save traditional valve, air door and regulate the energy that is lost, thereby reach purpose of saving.
Fig. 1 is the structural representation of integration power saver in the specific embodiment of the invention.As shown in Figure 1, this integration power saver comprises that the first operation contactor 1, harmonic wave suppress unit 2, filter unit 3, economize on electricity control module 4, second operation contactor 5, out put reactor 6 and the civil power by-pass unit 7.
The economize on electricity control module further comprises central control unit, input current sampling unit, input voltage sampling unit, rectification unit, power cell, output current sampling unit, output voltage sampling unit, sinusoid pulse width modulation modulation (Sinusoidal Pulse Width Modulation; SPWM) control drive unit, protective circuit, power subsystem, PID (Proportion Integration Differentiation, PID) controller, transducer, simulation speed governing unit, digital speed-control unit, control terminal unit, keyboard display unit and output frequency display unit.
Out put reactor further comprises three inductance elements.
The input of the first operation contactor is connected with three-phase alternating-current supply.
Harmonic wave suppresses the unit and filter unit moves between contactor and the node control module input first; Harmonic wave suppresses the unit and further comprises three inductance component L 1; Three inductance elements are connected on three distribution wires of three-phase alternating-current supply; This group inductance element front end is in series with the main contact of the first operation contactor KM1, and harmonic wave suppresses the above high order harmonic component of 1KHz that the unit suppresses the feedback grid of economize on electricity control module generation.Filter unit further comprises three inductance component L 2 and three capacity cell C; The input of filter unit is connected with the output that harmonic wave suppresses the unit; Its parameter is through optimum organization; Effectively 5 times, 7 times and 11 inferior low-order harmonics of filtering economize on electricity control module input can also be taken into account the needs of reactive power compensation, improve the system power factor.
Harmonic wave suppresses three inductance elements of unit and three inductance elements of filter unit are integrated on the matrix pattern iron core, utilizes mutual inductance can effectively reduce the volume of reactor.
The input of economize on electricity control module suppresses the unit through harmonic wave and is connected with the main contact of filter unit with the first operation contactor, and the output of economize on electricity control module is connected with the three-phase alternating-current supply input of motor through the main contact of the second operation contactor KM2, three inductance elements of out put reactor successively.
In the economize on electricity control module, central controller is a core cell of realizing frequency conversion power saving control.
The input current sampling unit is connected on the three-phase alternating-current supply distribution wire of input of economize on electricity control module, the electric current of input current sampling unit sampling input, and the input current sampling end through central control unit feeds back to central location and handles.
The input voltage sampling unit is connected on the three-phase alternating-current supply distribution wire of input of economize on electricity control module, the voltage of input voltage sampling unit sampling input, and the input voltage sampling end through central control unit feeds back to central location and handles.
Rectification unit is connected on the three-phase alternating-current supply distribution wire, and rectification unit carries out exporting after the rectification to three-phase alternating-current supply.
The input of power cell is connected with one tunnel rectification output of rectification unit, and the output of power cell is the output of economize on electricity control module.
The output current sampling unit is connected on the distribution wire of output of economize on electricity control module, the electric current of output current sampling unit sampling output, and the output current sampling end through central control unit feeds back to central location and handles.
The output voltage sampling unit is connected on the distribution wire of output of economize on electricity control module, the voltage of output voltage sampling unit sampling output, and the output voltage sampling end through central control unit feeds back to central location and handles.
The input of protective circuit is connected with the frequency modulation control output of central control unit; The output of protective circuit is connected with the control input end of SPWM control drive unit; The control output end of SPWM control drive unit is connected with the control input end of power cell, is used for the power controlling unit and realizes frequency-converter power output.
The power subsystem input is connected with another road rectification output of rectification unit, and the power subsystem output is connected with the SPWM control drive unit with central control unit, and power subsystem provides working power to other element circuits.
The signal input part of PID controller is connected with transducer; The signal output part of PID controller is connected with central control unit through the PID control input end of central control unit; The PID controller sends to the central control unit processing with system's real-time requirement signal (pressure of actual demand, temperature or flow signal etc.) of sensor acquisition feedback, realizes the PID closed-loop control.
Simulation speed governing unit is connected with central control unit respectively with the digital speed-control unit, realizes the speed governing of motor.
The control terminal unit is provided with start-up control terminal, time-out control terminal, reseting controling end, multistage speed control system terminal and fault output control terminal, connects with the corresponding control input end of central control unit, realizes the manual control of frequency conversion power saving.
Keyboard display unit is connected with central control unit respectively with the output frequency display unit, and keyboard display unit is carried out the system parameters setting, and the output frequency display unit shows output frequency in real time.
The civil power by-pass unit is connected across between the three-phase alternating-current supply input of three-phase alternating-current supply and motor, and the civil power by-pass unit further comprises bypass contactor, when the civil power by-pass unit breaks down in the economize on electricity control module, realizes the civil power bypass.
Power-saving running is controlled through the first operation contactor KM1 and the first operation contactor KM2, and civil power bypass is simultaneously carried out interlocking with the economize on electricity loop at the secondary system control loop.During power-saving running; By the first operation contactor KM1 and the corresponding major loop of the second closed connection of operation contactor KM2 main contact; Simultaneously inner parameter is provided with and realizes economize on electricity control; Operating personnel can realize supervision and control to system mode through the operation of output frequency display unit and keyboard display unit, thereby change power input to a machine.
When electricity-saving state puts into operation first, need through keyboard display unit system to be carried out parameter setting earlier.Specific as follows: it is 0 that F0-02 is set, Keyboard Control; It is 1 that F0-03 is set, switching value control; It is 48 that F0-12 is set, upper limit control point; It is 32 that F0-14 is set, the lower limit control point; According to the parameter of electric machine Fl group parameter is set; F4-00～F4-04 is set accomplishes the control terminal corresponding function; F4-11～F4-20 parameter is set, accomplishes analog regulation or digital regulated function setting; The F5-02 output parameter is set, F5-07 output frequency display parameters are set; The PID function of FA group parameter is set; Through the selection analog input signal O～lOV of wire jumper on the master control borad or the type of 4～20mA.Wherein F0-02, F0-03, F0-12, F0-14, Fl, F4-OO～F4-04, F4-11～F4-20, F5-02, F5-07, FA presentation function code.The power supply that is provided by rectification unit is that whole integration power saver main control part provides the control power supply; Central control unit is through the external sensor sampled signal or voltage, the current signal of the inner real-time sampling of control module unit from the output sampling that economize on electricity; And power control signal offered power cell; Thereby the break-make of power controlling switching device realizes power output, to reduce and to weaken output harmonic wave to greatest extent.And the harmonic wave that input seals in suppresses the above high order harmonic component of 1KHz that the unit can suppress and weaken the feedback grid of frequency converter generation; The low-order harmonic filter unit of input can be well suppresses 5 times, 7 times, 11 inferior low-order harmonics; Make electricity-saving appliance realize low harmonic wave, the low interference, concrete actual effect is seen table 1.
Table 1 is used economize on electricity harmonic inhibition effect measured value contrast table in the instance of the present invention.
Annotate: in the form 5 times, 7 times, 11 times, 13 subharmonic refer to that all corresponding harmonic wave accounts for the percentage of first-harmonic.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. integration power saver; It is characterized in that; Comprise the first operation contactor, economize on electricity control module, second operation contactor and the out put reactor; The economize on electricity control module further comprises central control unit, input current sampling unit, input voltage sampling unit, rectification unit, power cell, output current sampling unit, output voltage sampling unit, SPWM control drive unit, protective circuit, power subsystem, PID controller and transducer; Out put reactor further comprises three inductance elements, wherein
The input of the first operation contactor is connected with three-phase alternating-current supply;
The input of economize on electricity control module is connected with the main contact of the first operation contactor;
The output of economize on electricity control module is connected with the three-phase alternating-current supply input of motor through the main contact of the second operation contactor, three inductance elements of out put reactor successively,
In the economize on electricity control module, the input current sampling unit is connected on the three-phase alternating-current supply distribution wire of input of economize on electricity control module, the electric current of the input that is used to sample, and the input current sampling end through central control unit feeds back to central location and handles;
The input voltage sampling unit is connected on the three-phase alternating-current supply distribution wire of input of economize on electricity control module, the voltage of the input that is used to sample, and the input voltage sampling end through central control unit feeds back to central location and handles;
Rectification unit is connected on the three-phase alternating-current supply distribution wire, is used for three-phase alternating-current supply is carried out exporting after the rectification;
The input of power cell is connected with one tunnel rectification output of rectification unit, and the output of power cell is the output of economize on electricity control module;
The output current sampling unit is connected on the distribution wire of output of economize on electricity control module, the electric current of the output that is used to sample, and the output current sampling end through central control unit feeds back to central location and handles;
The output voltage sampling unit is connected on the distribution wire of output of economize on electricity control module, the voltage of the output that is used to sample, and the output voltage sampling end through central control unit feeds back to central location and handles;
The input of protective circuit is connected with the frequency modulation control output of central control unit; The output of protective circuit is connected with the control input end of SPWM control drive unit; The control output end of SPWM control drive unit is connected with the control input end of power cell, is used for the power controlling unit and realizes frequency-converter power output;
The power subsystem input is connected with another road rectification output of rectification unit, and the power subsystem output is connected with the SPWM control drive unit with central control unit, is used to provide working power;
The signal input part of PID controller is connected with transducer; The signal output part of PID controller is connected with central control unit through the PID control input end of central control unit; Be used for the PID controller and system's real-time requirement signal of sensor acquisition feedback is sent to central control unit handle, realize the PID closed-loop control;
Central controller is used to realize frequency conversion power saving control.
2. integration power saver according to claim 1; It is characterized in that; The economize on electricity control module further comprises simulation speed governing unit and digital speed-control unit, and simulation speed governing unit is connected with central control unit respectively with the digital speed-control unit, is used to realize the speed governing of motor.
3. integration power saver according to claim 1; It is characterized in that; The economize on electricity control module further comprises the control terminal unit; The control terminal unit is provided with start-up control terminal, time-out control terminal, reseting controling end, multistage speed control system terminal and fault output control terminal, connects with the corresponding control input end of central control unit, is used to realize the manual control of frequency conversion power saving.
4. integration power saver according to claim 1; It is characterized in that; The economize on electricity control module further comprises keyboard display unit and output frequency display unit; Keyboard display unit is connected with central control unit respectively with the output frequency display unit, and keyboard display unit is used to carry out system parameters to be set, and the output frequency display unit is used for showing in real time output frequency.
5. according to the described integration power saver of arbitrary claim in the claim 1 to 4; It is characterized in that; Comprise that also harmonic wave suppresses unit and filter unit, harmonic wave suppresses the unit and further comprises three inductance elements, and filter unit further comprises three inductance elements and three capacity cells; Harmonic wave suppresses the unit and filter unit moves between contactor and the node control module input first; Harmonic wave suppresses unit be used to suppress the to economize on electricity above high order harmonic component of 1KHz of the feedback grid that control module produces, and the input of filter unit is connected with the output of harmonic wave inhibition unit, is used for filtering economize on electricity 5 times, 7 times and 11 low-order harmonics of control module input.
6. integration power saver according to claim 1; It is characterized in that; Also comprise the civil power by-pass unit, the civil power by-pass unit is connected across between the three-phase alternating-current supply input of three-phase alternating-current supply and motor, and the civil power by-pass unit further comprises bypass contactor; Be used for when the economize on electricity control module breaks down, realizing the civil power bypass.
7. integration power saver according to claim 5 is characterized in that, harmonic wave suppresses three inductance elements of unit and three inductance elements of filter unit are integrated on the matrix pattern iron core.
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| CN103532478A (en) * | 2013-10-29 | 2014-01-22 | 上海绿仁节能环保工程有限公司 | System for realizing energy-conservation control of electric motor under condition that speed is not reduced |
| CN104104083A (en) * | 2014-08-13 | 2014-10-15 | 中山顺富节能科技有限公司 | Intelligent comprehensive power saver |
| CN104199331A (en) * | 2014-09-10 | 2014-12-10 | 中山顺富节能科技有限公司 | An embedded power saving device |
| CN104283218A (en) * | 2014-10-20 | 2015-01-14 | 中山顺富节能科技有限公司 | An intelligent power saving system |
| CN104317222A (en) * | 2014-10-20 | 2015-01-28 | 中山顺富节能科技有限公司 | A portable integrated energy-saving controller |
| CN104360615A (en) * | 2014-10-20 | 2015-02-18 | 中山顺富节能科技有限公司 | A power-saving controller with strong harmonic-free stability |
| CN104360614A (en) * | 2014-10-20 | 2015-02-18 | 中山顺富节能科技有限公司 | An intelligent energy-saving controller without harmonics |
| CN104375427A (en) * | 2014-10-20 | 2015-02-25 | 中山顺富节能科技有限公司 | A multi-purpose energy-saving controller with simple structure |
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| CN104199331A (en) * | 2014-09-10 | 2014-12-10 | 中山顺富节能科技有限公司 | An embedded power saving device |
| CN104283218A (en) * | 2014-10-20 | 2015-01-14 | 中山顺富节能科技有限公司 | An intelligent power saving system |
| CN104317222A (en) * | 2014-10-20 | 2015-01-28 | 中山顺富节能科技有限公司 | A portable integrated energy-saving controller |
| CN104360615A (en) * | 2014-10-20 | 2015-02-18 | 中山顺富节能科技有限公司 | A power-saving controller with strong harmonic-free stability |
| CN104360614A (en) * | 2014-10-20 | 2015-02-18 | 中山顺富节能科技有限公司 | An intelligent energy-saving controller without harmonics |
| CN104375427A (en) * | 2014-10-20 | 2015-02-25 | 中山顺富节能科技有限公司 | A multi-purpose energy-saving controller with simple structure |
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Application publication date: 20121205 |