CN2257936Y

CN2257936Y - Power regulator

Info

Publication number: CN2257936Y
Application number: CN 95203870
Authority: CN
Inventors: 陈金生
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-25
Filing date: 1995-02-25
Publication date: 1997-07-16
Anticipated expiration: 2005-02-25

Abstract

The utility model discloses a power regulator. The utility model is composed of a main control unit and a power regulating control unit. The utility model is characterized in that a power regulator is connected with a loop in series by a single wire, and the loop is composed of an AC power supply and a load; the main control unit comprises a rectifier, a voltage stabilizer, a thyristor, a voltage dividing and current limiting resistance, etc. the utility model can change the cycle number of an AC sine wave power supply obtained by the load through changing that the thyristor is switched on and switched off in a unit time, and the stepless power regulating purpose can be achieved. The high frequency interference and the current impact can be reduced, and the utility model has a definite power saving effect.

Description

Power governor

The utility model relates to a kind of PCU Power Conditioning Unit.

Existing power governor (to call power regulating eqiupment in the following text) has two kinds, and a kind of is electromechanical, adopts the single line tandem-type connection, and utilizes the step-down of transformer tapping dividing potential drop to change the voltage that is added in the load, to reach the purpose of power adjustments.This method has following shortcoming:

1. waste is bigger, as the transformer of voltage divider most of electric energy is converted into heat energy and consumes in vain, the power that load obtains more hour, this consumption is big more.

2. power can not step-less adjustment, can only divide some grades to regulate.

3. volume is big and heavy, and inconvenience is fixing, and inconvenience adds additional functions such as timing remote control.

4. take a large amount of metal materials, as silicon steel sheet, copper cash etc.

Another kind is the electronic type power regulating eqiupment, though solved some shortcomings of electromechanical power regulating eqiupment, but brought new problem, so far can not penetration and promotion.

1. though this method of phase-shift method is simple, but because control silicon controlled conduction angle, what make that load obtains is the alternating voltage waveform of distortion, this waveform contains many harmonic componentss (being higher hamonic wave) and has produced high frequency interference, near (N is a natural number) this interference maximum in the time of thyristor operating angle is in (2N+1) 90 degree, this moment, load voltage was suddenlyd change to peak values of ac more than 300 volts by 0V; At this moment to the load shock maximum, will shorten load life greatly, simultaneously AC network be brought bigger harm, and also have a strong impact on radio and normally listen to.

2. this method of zero passage switch method has adopted the silicon control zero-cross testing circuit, can make load obtain complete AC wave shape, and eliminate high frequency interference.But its cost increases greatly, and the mode of connection and electromechanical power regulating eqiupment are completely different, needs four extension lines, and two connect AC power, and two connect load, and AC power and load are parallel connection methods, can not compatibility with traditional power regulating eqiupment, can't substitute or promote the use of.

3. this method of frequency variation method is that industrial-frequency alternating current with 50HZ is transformed to the high-frequency alternating current about 20KHZ, by changing frequency or duty regulatory work rate size recently, have energy-conserving action, but this method exists high frequency interference, cost costliness, be difficult for shortcomings such as universal.

The purpose of this utility model is to provide a kind of cheap, the novel electron power regulating eqiupment of simple and feasible.It not only can regulate watt level, but also the function and the energy-conserving action of stepless power regulating are arranged, and this device single line is connected in the loop that AC power and load form, and has realized and the identical mode of connection of traditional electromechanical power regulating eqiupment, is convenient to promote the popularization use.

Its objective is such realization, AC power and load and power regulating eqiupment are connected in series in the same loop, and by changing the make-to-break ratio of controllable silicon in the unit interval, change the cycle that is added to the unit interval in the load, directly change the power that load obtains, promptly reached the purpose of Power Regulation.

Fig. 1 is the electrical schematic diagram of the utility model embodiment.

Below in conjunction with drawings and Examples the utility model is described in further detail.

In electrical schematic diagram shown in Figure 1, dotted portion is external load M and AC power.Entire circuit is divided into main control unit, Power Regulation control module.

Main control unit is by power switch K1, commutation diode V1-V4, current-limiting resistor voltage divider R1, commutation diode string V6-V15, compositions such as electrochemical capacitor C1.

Narrate the main control unit principle of work below:

One end of AC power inserts the O end of this example main control unit by load M, be connected with power switch K1 then, insert the ac input end of bridge rectifier again, the other end of alternating current then directly is connected in P with this example main control unit and holds, and then another ac input end of access bridge rectifier, commutation diode V1-V4 forms bridge rectifier, the alternating current that the OP end is sent into becomes unidirectional Rectified alternating current, the output voltage of bridge rectifier is after resistance R 1 dividing potential drop current limliting, because the voltage stabilizer that diode string V6-V15 forms, the output of its voltage stabilizer, promptly the B point voltage is 6 volts a DC voltage.Controllable silicon Vm12 is in parallel with resistance R 1, i.e. the central electrode MT1 of controllable silicon V12 connects the output terminal of bridge rectifier, sub-electrode MT2 and R1, and diode string V6-V15, the positive pole of capacitor C 1 are connected in the B point.Silicon controlled control utmost point G is connected with output stage in the Power Regulation control module.Another output terminal of bridge rectifier links to each other and ground connection with the negative pole of the negative terminal of diode string and capacitor C 1.This example Power Regulation control module is by integrated package CC4011, output stage triode V5, diode V16V17, resistance R 2, resistance R 3, resistance R 4, resistance R 5, compositions such as potentiometer R9.

Narrate the principle of work of Power Regulation control module below:

This Power Regulation control module is added to the ratio of cycle in total cycle on the load M during by the conducting of control controllable silicon, reach the purpose of Power Regulation.(load obtains) cycle that controllable silicon passes through in unit interval is many more, and the power in the load is just big more.As shown in the formula the cycle of P=N/ (N+M) PT N-conducting, the cycle of M-blocking-up, the power during conducting continuously in the PT unit interval.

For making the sinusoidal waveform that obtains on the load M complete, two Sheffer stroke gates by integrated circuit CC4011, potentiometer R9, diode V16V17, resistance R 4R5, D point among composition oscillator Fig. 1 is the output terminal of oscillator, when D point output one gating pulse, this gating pulse is added to the control utmost point of controllable silicon V18 by output stage, makes the V18 conducting, in case controllable silicon V18 conducting, its voltage drop will be kept to about 2V, bridge rectifier output is by changing into by R1 by controllable silicon V18, and at this moment total voltage is fallen less than 9V on the main control unit, and promptly most of voltage of alternating current is high-fall on the load M.When next half cycle arrives, oscillator is exported a gating pulse again, make controllable silicon V18 conducting once more, the load M half cycle voltage of getting back, adding up to upper half just in time is a sine wave, so go down, load has obtained the sinusoidal ac consistent with AC power, and 50 cycles of per second are not because M=0 promptly has the cycle of blocking-up, so P=PT, the power maximum that load this moment obtains.If regulator potentiometer R9 promptly changes the output duty of ratio, make controllable silicon V18 conducting number of times reduce half, the cycle that load M obtains reduces half thereupon, be that the actual power that obtains of P=1/2PT load M is half of full power behind 25 cycle N=25 of per second M=25 substitution following formula, reached the purpose of Power Regulation.Because controllable silicon V18 is controlled near the conducting of the voltage over zero of AC power basically and ends, at this moment current changing rate is less, makes load obtain complete substantially waveform, has significantly reduced high frequency interference.

Another input end F point of oscillator is other signal input end, if at F point joining day control signal this power regulating eqiupment increase timing function then.

By the description of above operation principle and the electric circuit constitute, the main feature that the utility model is compared with other prior aries can be summarized as follows:

1. two lead-out wires, the utility model externally only has two lead-out wires, and one connects alternating current The source, one meets load M, AC power be that power regulating eqiupment is connected with this example again after load M connects, In full accord with the method for attachment of electromechanical power regulating eqiupment outer lead, can mutually replace penetration and promotion.

2. realized stepless power regulating, can change bearing power owing to change oscillator output duty of ratio, can change dutycycle, and then change potentiometer R9 can be more carefully and change potentiometer R9, seamlessly the power of any regulating load has solved the problem that the electromechanical power regulating eqiupment can't deblock.

3. this example has the characteristics of extendable functions, adds different control signals at the F of oscillator input end, can realize various control functions such as timing, remote control, touch.

4. solved high frequency interference and current impact, reached the Power Regulation purpose, guaranteed sinusoidal wave completely, significantly reduced high frequency interference and rush of current owing to take to change the cycle that is added in unit interval in the load.

5. because high-power stabilivolt cost is too high, realize difficulty, this example has adopted some commutation diode series connection, has realized the purpose of high-power voltage stabilizing with low cost.

Claims

1. power governor, this device includes main control unit, Power Regulation control module, printed board, connecting line etc., it is characterized in that the power governor single line is connected in the loop of AC power and load composition, and main control unit includes rectifier, voltage stabilizer, controllable silicon, current-limiting resistor voltage divider etc., the rectifier input end is connected with AC power and load, output terminal is connected with controllable silicon, voltage stabilizer, and current-limiting resistor voltage divider is in parallel with controllable silicon.

2. by the power governor of claim 1 defined, the output voltage that it is characterized in that voltage stabilizer is more than the 2V.

3. by the power governor of claim 1 defined, it is characterized in that voltage stabilizer adopts the diode more than 3 to be composed in series.

4. by the power governor of claim 1 defined, it is characterized in that current-limiting resistor voltage divider is earlier in parallel with controllable silicon, connect with rectifier and voltage stabilizer again.

5. by the power governor of claim 1 defined, it is characterized in that the rectifier input end connects with AC power and load, rectifier output end is connected with controllable silicon, voltage stabilizer.

6. press the power governor of claim 1 defined, the control utmost point that it is characterized in that controllable silicon is connected with the output stage of Power Regulation control module, silicon controlled central electrode [MT1] is connected with the rectifier positive output end, and its sub-electrode [MT2] is connected with the voltage stabilizer negative output terminal.