CN2228238Y - High-efficiency power controller - Google Patents

Abstract

The utility model relates to a high-efficiency power controller. A power supply circuit IV is connected with a waveform generation circuit I through a rectification and voltage regulation circuit, and the waveform generation circuit I is used as a direct current power supply; a square wave output by the waveform generation circuit I is connected with the end 2 and the end 4 of a bridge rectifier circuit D21-D24 of a controlled silicon circuit III through an optical coupling circuit. The 3 end of the D21-D24 is connected with the control end of a bidirectional controlled silicon STR, an electric appliance RL is connected with the output end of the controlled silicon circuit III, and the end 1 of the D21-D24 is connected with the power supply circuit IV.

Description

The highly efficient power controller

The utility model is relevant with the controllable silicon power controller.

Traditional controllable silicon current controller, main by the control of potentiometer to the size of current or the trigger angle of SCR control end, make the electric current of entire circuit controlled.Because the problem of the thermal stability of the silicon heat stability of controllable silicon itself and potentiometer, make the less stable of controllable silicon current control circuit.Differ greatly electric current linear very poor in the required trigger current of beginning of conduction value with the required trigger current in stable back.As voltage in the power supply fluctuation is arranged, the current fluctuation of output is bigger, makes the control weak effect of control circuit.

It is convenient that the purpose of this utility model provides a kind of regulation and control, reliable, the power controller that control stiffness is high.

Wave generator circuit I of the present utility model meets power circuit IV, and circuit I output meets the bridge rectifier circuit D of ghyristor circuit III by photoelectric coupled circuit II ₂₁-D ₂₄, bridge rectifier circuit D ₂₁-D ₂₄1 termination low-voltage alternating current power supply, bridge rectifier circuit D ₂₁-D ₂₄The output of 2,4 termination photoelectric coupled circuit, bridge rectifier circuit D ₂₁-D ₂₄The control end of 3 termination bidirectional triode thyristor STR, electrical appliance RL connects the output of ghyristor circuit III.

The utility model power circuit IV mainly comprises: by a, and the 220V low-tension supply commonly used of b two ends input; By bridge rectifier circuit D ₁₁～D ₁₄With the integrated electric piece IC of voltage stabilizing ₁The low-voltage dc power supply of forming; And pass through R ₂₃, C ₂₃With DLAC, R ₂₆Low pressure (the not being higher than 50V) AC power that produces.The square wave generation ic chip of low-voltage dc power supply output welding wave generation circuit I ₂1,4 end, IC ₂Control end 6 pin connect capacitor C ₅Potentiometer W with series connection ₁, W ₂With diode D ₃, D ₂As IC ₂The controlling element of output waveform accounting rate, IC ₂1,3 pin connect the optocoupler ic chip ₃1,2 end, IC ₃4,5 meet D ₂₁～D ₂₄2,4 connect.D ₂₁～D ₂₄1 end by the series connection R ₂₃, C ₂₃And DLAC, R ₂₆Be connected to the AC power two ends.

IC of the present utility model ₁Can be the LM7812 integrated circuit, IC ₂Can be the NE555 integrated circuit, IC ₃Can be the 4N35 integrated circuit.

The utility model is with capacitor C ₅With potentiometer W ₁, W ₂Output frequency control element as the NE555 integrated package of wave generator circuit.Output frequency f=(W ₁+ W ₂) C ₅* δ.With W ₁With diode D ₃, D ₂Be output waveform accounting rate controlling element, by control W ₁The regulation and control end and the resistance ratio of 1,2 end, can obtain corresponding linear waveform ratio square wave at NE555 output terminal 3.The control mode of ghyristor circuit is as follows:

Ac frequency commonly used is 50 hertz, and the zero passage number of times in a second is 100.Positive arc ripple in one second is divided into 10 parts, and wave generator circuit just in time produces 10 hertz square wave.The peak value of square-wave waveform is by circuit I I, and III is controlling the ON time of each equal portions alternating current, thereby the electric current of controlled electrical appliance RL is changed accordingly.

The utility model can make the regulation and control of household electrical appliance convenient, reliable, can combine multiple functions such as realizing temperature adjustment, timing easily with other class control circuit, can be used on the medium-high frequency SCR AC power control circuit.Wide, the automatically controlled rate height of purposes, good energy saving property are made easily, and be with low cost.

Fig. 1 is a block scheme of the present utility model

Fig. 2 is the real novel circuit theory diagrams of this practicality

Fig. 3 is waveform modulated figure.Middle figure is the alternating current sine wave.Figure below is the output frequency ripple after modulating.Last figure is the square wave of modulation back output.

Following is embodiment of the present utility model:

Power supply IV is the 220V AC power.Capacitor C ₁, resistance R ₁, R ₂, diode D ₁, capacitor C ₂, C ₃With integrated package of pressure-stabilizing LM7812 and bridge rectifier circuit D ₁₁-D ₁₄Form direct current regulation circuit, output 12V direct current in 1,4 end of NE555 as its direct supply.Capacitor C ₅With diode D ₂, potentiometer W ₁, W ₂Be connected in series in 1,8 end of NE555,6,2 of NE555 is terminated at C ₅And D ₂Between.Capacitor C ₄Be connected to 5 ends and the connecting to neutral of NE555.Diode D ₃Be connected to W ₁Control end and 6 ends of NE555, be connected to C again ₅And D ₂Between.C ₅With W ₁, W ₂Be the output frequency control element of NE555, W ₁With D ₃, D ₂Output waveform accounting rate control element for NE555.

1,2 end of light-coupled isolation integrated package 4N35 and 3,1 ends of NE555 connect, R ₃Be current-limiting resistance.4, the 5 termination electric bridge D of 4N35 ₂₁-D ₂₄2,4 ends.Bidirectional triode thyristor DLAC passes through R ₂₃And C ₂₃, R ₂₆Be connected to AC power and produce a low-voltage AC.Electric bridge D ₂₁-D ₂₄3 ends pass through resistance R ₂₅Be connected to the triggering pin of bidirectional triode thyristor STR.5, the 4 ends control STR of NE555 triggers the break-make of the electric current of pin.R ₂₄, C ₂₄, R ₂₂, C ₂₂, R ₁₁, C ₂₁For higher hamonic wave is removed element.RL is an electrical appliance.

Claims (3)

1, highly efficient power controller is characterized in that power circuit IV welding wave generation circuit I as its direct supply, and the output of wave generator circuit I meets the bridge rectifier circuit D of ghyristor circuit III by photoelectric coupled circuit II ₂₁-D ₂₄2,4 ends, 1 termination low-voltage alternating current power supply of bridge rectifier circuit, D ₂₁-D ₂₄The control end of 3 termination bidirectional triode thyristor STR, electrical appliance RL connects the output of ghyristor circuit III.

2, highly efficient power controller according to claim 1, the direct supply that it is characterized in that power circuit IV is by bridge rectifier circuit D ₁₁-D ₁₄With integrated package of pressure-stabilizing IC ₁Form IC ₁The square wave generation ic chip of 2,3 termination wave generator circuit I ₂1,4 end, IC ₂Control end 6 connect capacitor C ₅Potentiometer W with series connection ₁, W ₂, W ₁With diode D ₂, D ₃Series connection is as IC ₂The controlling element of output waveform accounting rate, IC ₂1,3 termination optocoupler ic chip ₃1,2 end, IC ₃4,5 termination D ₂₁-D ₂₄2,4 ends.D ₂₁-D ₂₄1 end respectively by the series connection R ₂₃, C ₂₃With the DLAC of series connection, R ₂₆Be connected to the two ends of Flow varying power supply.

3, highly efficient power controller according to claim 1 and 2 is characterized in that IC ₁Be LM7812 integrated circuit, IC ₂Be NE555 integrated circuit, IC ₃Be the 4N35 integrated circuit.

Images