CN2305806Y - Energy saving controller for three-phase motor - Google Patents
Energy saving controller for three-phase motor Download PDFInfo
- Publication number
- CN2305806Y CN2305806Y CN 97222103 CN97222103U CN2305806Y CN 2305806 Y CN2305806 Y CN 2305806Y CN 97222103 CN97222103 CN 97222103 CN 97222103 U CN97222103 U CN 97222103U CN 2305806 Y CN2305806 Y CN 2305806Y
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- CN
- China
- Prior art keywords
- utility
- voltage
- motor
- model
- utmost point
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Abstract
The utility model relates to an energy-saving controller for three-phase motors. The utility model is composed of an air switch, a thyristor, a photoelectric coupler, a single-chip computer, a power transformer, a direct current voltage-stabilizing working power supply, a three-phase synchronous circuit and a control pole trigger. The utility model detects the actual load of the motor, determines the appropriate angle of the flow of the thyristor through the analyzing and treatment of the single-chip computer, regulates the current and the voltage of the motor, and causes the input power of the motor to be matched with the real output power, and then the utility model improves the running efficiency of the motor and realizes energy saving.
Description
The utility model relates to a kind of threephase motor energy-saving controller.
In the prior art, the power supply of threephase motor directly is added to the motor wiring terminal for fixing three-phase 380V by A.C. contactor, middle no adjusting device.Like this, motor is under unloaded and underloading situation, and input power can not get control and regulates.As everyone knows, input power P
1=3U1I1COS φ 1, power output P
2=P
1-(P
CU1+ PFe+P
N+ P
CU2+ P
S).P wherein
CU1, PFe, P
N, P
CU2, P
SBe respectively stator copper loss, stator iron loss, rotor copper loss, mechanism's loss, harmonic wave magnetic loss.Therefore, when zero load and underloading, suitably turn down input terminal voltage and electric current, then can reduce above-mentioned multinomial consumption greatly, and save a large amount of input powers, but not have this kind controller in the prior art.
The purpose of this utility model is to provide the actual size of a kind of input terminal voltage and electric current apparent load to realize control automatically and adjusting, and input power and real output are adapted and energy-conservation threephase motor energy-saving controller.
The purpose of this utility model realizes in the following way.The utility model comprises three power supply air switches, its structural feature is that power supply receives the controllable silicon anode through air switch, be added on the threephase motor by the controllable silicon negative electrode, take out current signal from three groups of silicon controlled anode and cathode two ends, through three groups of corresponding photoelectrical coupler input monolithic computers, power transformer is supplied with the interchange input of controller DC voltage-stabilizing working power and the voltage sampling input monolithic computer of three-phase synchronization control circuit, monolithic computer divides three tunnel output control utmost point triggers, and control utmost point trigger is controlled the silicon controlled control utmost point respectively.
The utility model is simple in structure, and components and parts are easily purchased, and is easy for installation, and cost is low, motor operational efficiency height, and good energy-conserving effect, the actual measurement energy-saving efficiency is more than 25%.
Accompanying drawing is a circuit diagram of the present utility model.
The accompanying drawings preferred embodiment of the utility model.Shown in circuit diagram, power supply is through air switch K
1Receive controllable silicon KS
1, KS
2, KS
3Anode, be added on the threephase motor D by the controllable silicon negative electrode, from three groups of controllable silicon KS
1, KS
2, KS
3The anode and cathode two ends take out current signal, close Q through three groups of corresponding 4N35 type photoelectrical couplers
1, Q
2, Q
3Input AT89C2051 type monolithic computer CPU, power transformer T supplies with the interchange input of controller DC voltage-stabilizing working power and the voltage sampling input monolithic computer CPU of three-phase synchronization control circuit, and monolithic computer divides three tunnel output MOC3021 type control utmost point trigger Q
4, Q
5, Q
6, control utmost point trigger is controlled the silicon controlled control utmost point respectively.
The operation principle of the present utility model and the course of work are as follows:
From the voltage that take out at three groups of silicon controlled negative and positive two ends, current signal is through three groups of corresponding photoelectrical coupler Q
1, Q
2, Q
3The current zero-crossing point of motor inductance load taken out deliver to monolithic computer, computer goes out silicon controlled angle of flow size by corresponding computed in software and delivers to control utmost point trigger Q
4, Q
5, Q
6Remove to control the silicon controlled control utmost point,, thereby realize energy-conservation function with control thyristor operating angle size.Three groups of transformer T
1, T
2, T
3Elementary three phase voltages of A, B, C of receiving three phase mains respectively, transformer T
1Secondary two groups of outputs are arranged, wherein one group through rectifier bridge D
1With voltage stabilizing sheet 7805, obtain low-voltage dc power supply and supply with controller DC voltage-stabilizing working power, secondary another group A and B, C two phase transformer T
2, T
3The inferior utmost point respectively through rectifier bridge D
2, D
3, D
4Be added to respectively by triode G
1, G
2, G
3With resistance R
1, R
2, R
3A, the B that forms, the synchronization control circuit of C three-phase obtain to carry out simultaneous operation, realizing the control according to the order of sequence of A, B, C three-phase on the synchronization pulse input monolithic computer.The utility model by A through electric current mutual inductor L
1The sampling alternating voltage is through rectifier bridge D
5Send into monolithic computer with d. c. voltage signal and carry out analyzing and processing, rated current 20% computer-chronograph that surpasses this motor when electric current sends stopping signal, plays overcurrent protection.The utility model can be connected on the normally opened contact of A.C. contactor J silicon controlled anode and cathode two ends, and when this controller itself broke down, K closed
2Threephase motor is worked on.K switch
3Be the switch of this controller, only cut-offfing K
2, closed K
3State under this controller operate as normal.
Claims (3)
1, a kind of threephase motor energy-saving controller, comprise the three phase mains air switch, it is characterized in that: power supply is received the controllable silicon anode through air switch, be added on the threephase motor by the controllable silicon negative electrode, take out current signal from three groups of silicon controlled anode and cathode two ends, through three groups of corresponding photoelectrical coupler input monolithic computers, power transformer is supplied with the interchange input of controller DC voltage-stabilizing working power and the voltage sampling input monolithic computer of three-phase synchronization control circuit, monolithic computer divides three tunnel output control utmost point triggers, and control utmost point trigger is controlled the silicon controlled control utmost point respectively.
2, controller according to claim 1 is characterized in that: through electric current mutual inductor sampling ac voltage signal, send into monolithic computer through rectifier bridge by single-phase.
3, controller according to claim 1 and 2 is characterized in that: the normally opened contact of A.C. contactor is connected on silicon controlled anode and cathode two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97222103 CN2305806Y (en) | 1997-07-23 | 1997-07-23 | Energy saving controller for three-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97222103 CN2305806Y (en) | 1997-07-23 | 1997-07-23 | Energy saving controller for three-phase motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2305806Y true CN2305806Y (en) | 1999-01-27 |
Family
ID=33937258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97222103 Expired - Fee Related CN2305806Y (en) | 1997-07-23 | 1997-07-23 | Energy saving controller for three-phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2305806Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370437A (en) * | 2017-08-14 | 2017-11-21 | 高玉琴 | Phase-shifting |
-
1997
- 1997-07-23 CN CN 97222103 patent/CN2305806Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370437A (en) * | 2017-08-14 | 2017-11-21 | 高玉琴 | Phase-shifting |
| CN107370437B (en) * | 2017-08-14 | 2023-08-22 | 高玉琴 | Phase-shifting motor electricity-saving device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |