CN104218928A - IND multipurpose circuit - Google Patents

IND multipurpose circuit Download PDF

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Publication number
CN104218928A
CN104218928A CN201310216379.5A CN201310216379A CN104218928A CN 104218928 A CN104218928 A CN 104218928A CN 201310216379 A CN201310216379 A CN 201310216379A CN 104218928 A CN104218928 A CN 104218928A
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circuit
load
ind
voltage
power supply
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尹万坡
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Abstract

The present invention belongs to the field of electronic technique, and relates to an IND multipurpose circuit. The IND multipurpose circuit includes a power source, an IND666 circuit, and a load ( including auxiliaries). The power source, the 666 circuit, and the load are connected with one another. The IND666 circuit includes a delaying open circuit, a sampling control and close circuit, a switch circuit. The delaying open circuit, the sampling control and close circuit and the switch circuit are connected. The IND666 circuit is disposed between the power source and the load. The IND666 circuit and the load ( including auxiliaries ) are interactively disposed so that the IND multipurpose circuit is a multifunctional circuit respectively having the functions of protection, oscillation, current stabilization, voltage stabilization, voltage stabilization initiation, speed stabilization and energy saving for different loads, is a circuit having complex functions.

Description

The multiplex circuit of IND
Technical field:
The present invention relates to the multiplex circuit of IND, belong to electronic technology field.
Background technology:
Existing functional circuit is not necessarily perfect, and some functional circuit functions are not fully up to expectations, and some functions are also difficult for realizing so far.
Summary of the invention:
I re-design some conventional functional circuits with a kind of new theory, a kind of new circuit; Provide some new functional circuits.The multiplex circuit of IND with simple principle, succinct composition, unique performance applications in practical electronic circuit.
The multiplex circuit of IND is comprised of DC power supply (hereinafter to be referred as power supply), IND basic circuit (IND***), load (comprising auxiliary equipment).IND*** is a kind of electronic switch.It is comprised of switching circuit, time control circuit, sampling control circuit.The shutoff of switching circuit and conducting, be subject to sampling the control of control circuit and time control circuit.IND*** is comprised of switching circuit 4, sampling control circuit 3, time control circuit 2.Sampling control circuit 3, time control circuit 2 are connected mutually with switching circuit 4.In IND circuit, IND*** is connected between power supply 1 and load 5.Power supply 1, IND***, load 5 interconnect.
IND666 is a IND basic circuit.The present invention mainly discusses to IND666 (hereinafter to be referred as 666).What 666 sampling control circuit adopted is that circuit is closed in sampling control, sampling control is closed circuit monitored parameter is carried out to sampling monitoring, the information obtaining is processed, when monitored parameter reaches the value of certain setting, produce control and close signal, this controls pass signal turn-offs switching circuit, and the value that samples this setting parameter of controlling pass circuit is worth (pass value controlled in abbreviation) the control pass that samples control pass circuit.When control pass signal exists, switching circuit maintains off state.Time control circuit is that what to adopt is delayed start-up circuit, and it is to close under the condition of signal in control not, through delay after a while, and delayed start-up circuit controling switch circuit turn-on.
The multiplex circuit of IND is simply because it simple in structure, and operation principle is simple.Any circuit all needs power supply, switch, load, and the 666th, a kind of electronic switch; Any switch all needs to control its conducting and shutoff, and 666 are provided with delayed start-up circuit and sampling control pass circuit.Arranging like this can contact power supply and load, and the feedback information of power supply and load has affected the process of the turn-on and turn-off of electronic switch.666 shutoff, can make power supply, load be protected; 666 periodic conducting and shutoffs can obtain shaking electric current in load; The variation of power supply, load, can cause the variation of 666 conductings, turn-off time, the variation of concussion frequency, and variation can make some parameter stability of circuit like this.
666 between power supply and load, erects the bridge that power supply is connected with load.If load needs protection, 666 can be in some parameter sampling monitoring of power supply or load, when a certain parameter exceeds standard, and power cutoff, protective circuit; If load need to be shaken electric current, 666 periodic turn-on and turn-off have just obtained concussion electric current in load; If load needs stable electric current, the 666th, switch circuit to adjust current; If load needs voltage stabilizing, the 666th, switch voltage-stabilizing circuit; If load is motor, the 666th, switch speed-stabilizing circuit.If load needs to start, the 666th, voltage stabilizing start-up circuit.Need to be to 666 settings according to load, according to 666 need to be to load setting, this interactive setting makes 666 multifunctional circuits with protection, concussion, voltage stabilizing, current stabilization, power stabilize, speed stabilizing, energy-conservation, special performance; Complex function circuit.666 simple circuits, economical and practical.
Accompanying drawing explanation
Accompanying drawing 1, the circuit structure block diagram of IND
Accompanying drawing 2, simple 666 power supply overpressure protection electrical schematic diagrams
The winding diagram of accompanying drawing 3,666
Accompanying drawing 4, a IND oscillating circuit electrical schematic diagram
Accompanying drawing 5, a IND speed-stabilizing circuit electrical schematic diagram
Accompanying drawing 6, a IND voltage stabilizing and voltage stabilizing start-up circuit electrical schematic diagram A
Accompanying drawing 7, a IND voltage stabilizing circuit electrical schematic diagram B
Accompanying drawing 8, a IND current stabilization circuit electrical schematic diagram
Accompanying drawing 1, IND circuit structure block diagram, the 1st, power supply, the 2nd, time control circuit, the 3rd, sampling control circuit, the 4th, switching circuit, the 5th, load.The structured flowchart of IND basic circuit (IND***) is in the middle square frame of IND circuit structure block diagram, and IND*** comprises time control circuit 2, sampling control circuit 3, switching circuit 4.The various piece of circuit interconnects.
IND basic circuit wherein has a kind of IND666 of being (being called for short 666), and in 666, time control circuit 2 is delayed start-up circuit, and sampling control circuit 3 is that circuit is closed in sampling control.666 is electronic switches, and switching circuit is its switch sections, and while narrating, said 666 conducting is exactly conducting and the shutoff of switching circuit with pass severed finger later.
Accompanying drawing 2 is a simple IND electrical schematic diagrams, and it is a power supply overpressure protection circuit of making of simple 666, is used for illustrating the operation principle of IND.T 2it is switching circuit.R 2, C 1form RC delayed start-up circuit, this delayed start-up circuit is in the situation that supply power voltage is stable, and the time of delay of delayed start-up circuit is stable; At supply power voltage with mains voltage variations in the situation that, the rising of supply voltage, C 1the time that is charged to certain voltage value can shorten, C 1what charge is exactly the time of delay of delayed start-up circuit during this period of time, shortens the time of delay on delayed start-up road; Supply voltage reduces, and extend the time of delay of delayed start-up circuit; Can change the time of delay of delayed start-up circuit with the variation of supply voltage.R 1, T 1, D 1form power supply superpressure sampling control and close circuit, R 1it is sample resistance.R 1, D 1and T 1emitter junction set a voltage control pass value, when supply voltage surpasses this magnitude of voltage, circuit is closed in sampling control will make switching circuit turn-off, voltage control pass value is the maximum of the supply voltage of the normal job requirement of load.FZ 1, FZ 2it is load.Operation principle is, switches on power, and when supply voltage is normal, C 1the voltage at two ends is zero, T 1, T 2cut-off, switching circuit is in off state, and power supply passes through R 1give C 1charging, C 1the voltage at two ends raises gradually, works as C 1the voltage at two ends is elevated to and makes T 2during the voltage of conducting, T 2conducting, load is normally worked.C 1what charge is exactly the time of delay of delayed start-up circuit during this period of time.Switching circuit turn-offs during this period of time.R 1, D 1, T 1set a voltage control pass value, when power supply surpasses this value, D 1the voltage at two ends surpasses its voltage stabilizing value and conducting, T 1conducting, produces control and closes signal, C 1pass through T 1electric discharge, C 1the lower voltage at two ends, T 2cut-off, switching circuit turn-offs, protection power source and load.After supply voltage recovers normally, T 1cut-off, power supply is through R 2give C 1charging, works as C 1the voltage at two ends is elevated to and makes T 2during conducting, load restoration work.
Part in accompanying drawing 2 dotted line frames is simple 666 circuit, and 666 practical circuit improve to some extent to this.Depend on the needs, what have will save power supply overpressure protection circuit, and what have will set up line under-voltage protective circuit, if superpressure, the under-voltage protecting circuit of power supply are set, is generally all located at 666 inside, in 666 outsides, does not draw.Circuit is closed in other sampling control of setting up having.Convenient for mapping later, the part in dotted line frame is reduced to 666 box indicatings.666 wiring represents with accompanying drawing 3.Terminals 1 termination power is anodal, 5 termination power negative poles, and 2,3 ends are switch terminals, 2 termination high potentials, 3 termination electronegative potentials, 4 ends are that incoming end is closed in sampling control.Time delay can also be set and adjust terminals etc., wouldn't draw.Sometimes FZ 2it is sample resistance.In circuit, sampling element generally all shows.
Also 666 composition can be divided into main circuit, power part (switching tube), sampling element (mostly being resistance or potentiometer).The main circuit of this circuit comprises T 1, R 2, C 1, power part T 2, sampling element R 1, D 1.The device of power part and main circuit is selected to participate in the experiment as required, and its quantity is increase and decrease to some extent also, and because of the difference of application, the quantity of the quantity of element, parameter, sampling control pass circuit can be different, but all use 666 to represent.666 practical meetings in the quantity of element used and in the parameter of element used are different, and main circuit, under the prerequisite of assurance function, makes every effort to brief, reduce costs, but their operation principle is basic identical.
666 circuit, according to the quantity of element different with parameter (but operation principle is identical), for different circuit, have do protective circuit, have do oscillating circuit, have make voltage stabilizing circuit
Embodiment:
Embodiment mono-, IND oscillating circuit.IND oscillating circuit is comprised of power supply, 666, load, and load is perception or capacitive load.666 sampling control pass circuit has been set a control pass value, and when monitored curtage reaches this value, 666 just in off state.Because load is perception or capacitive load, the curtage of load can not suddenly change, and this curtage increases to control pass value from zero (or a certain value) needs a period of time, is 666 ON time during this period of time; 666 what after turn-offing the delay through delayed start-up circuit, open is its turn-off time during this period of time again.666 periodic conductings have just formed concussion with shutoff.
Accompanying drawing 4 is a 666 to make the electrical schematic diagram of oscillating circuit, and load is inductive load.L 1inductance coil, is load, R 3be sample resistance, change R 3resistance can set 666 control pass value,, when the electric current of load reaches this control pass value (maximum of concussion electric current), sampling control pass circuit can make 666 shutoffs.
Operation principle, after switching on power, delayed start-up circuit is delayed, makes 666 conductings, power supply through 666, R 3give L 1two ends add voltage, L 1two ends add after voltage, pass through L 1electric current by zero, increase gradually, when electric current increases to the control pass value of 666 settings, R 3the voltage at two ends has reached and has made sampling control close the control pass value of circuit setting, produces control and closes signal, and 666 turn-off, and have no progeny in 666 passes, L 1no current, sample resistance R 3no current passes through, and sampling control pass circuit is not controlled pass signal.Delayed start-up makes 666 conductings again through time delay again, 666 so periodic conducting and shutoffs, L 1on just obtained concussion electric current.666 the turn-offing during this period of time of delayed start-up circuit delay, at L 1what increase to control pass value 666 is conductings to upper electric current during this period of time by zero.This concussion electric current is pulsating current.The instantaneous maximum (amplitude of vibration) of this concussion electric current is exactly that the control pass value of setting is closed in sampling control.The ratio that 666 ON time account for the concussion cycle is the pulse duty factor (hereinafter referred to as duty ratio) of concussion electric current.The size of the electric current of oscillating circuit (hereinafter referred to as concussion electric current) is not only relevant, also relevant with the wave mode of duty ratio and electric current with the amplitude of vibration of concussion electric current.In the situation that earthquake electric current wave mode is identical, amplitude of vibration is certain, duty ratio reduces, and concussion electric current is just little.Otherwise duty ratio increases, concussion electric current increases.
This oscillating circuit, due to the existence of sampling control pass circuit, makes to pass through L 1the maximum of transient current stable, so the amplitude of vibration of the concussion electric current of the output of this oscillating circuit equate, be electric current sustained oscillation circuit.
If supply voltage is constant, if L 1inductance value reduce, induction reactance reduces, after 666 conductings, L 1on electric current by zero time shorten that increases to control pass value, the duty ratio of pulsating current reduces, and shakes electric current just little.If by L 1short circuit, the concussion electric current recording is very little.This circuit has load short circuit protection function.If supply voltage is constant, if L 1inductance value increase, concussion electric current just increases.
This oscillating circuit does not need as general high-power oscillating circuit, oscillating circuit is set specially and promotes circuit, and it is the functional circuit with the high-power concussion electric current of direct output; The control pass value that circuit setting is closed in sampling control is limited in output current amplitude of vibration in certain scope, plays the protective effect to circuit, and this is a kind of oscillating circuit with output amplitude defencive function; Load short circuits as mentioned above, electric current is very little, and this is another oscillating circuit with load short circuit protection function.So it is the oscillating circuit with complex function.
The size of oscillating circuit electric current, can be by adjusting R 3, set control pass value and change; Also the time of delay of capable of regulating delayed start-up circuit, change duty and recently realize.
In this circuit, load is inductance coil, and other inductive load replaces inductance coil also to have same effect.
If keep L 1inductance value constant, and it is constant to make to postpone time of delay of open circuit.If supply voltage raises, be added in L 1the voltage at two ends raises, and passes through L 1electric current increase to the time shorten of control pass value, pulse narrowing, the duty ratio of pulsating current reduces, pulsating current reduces; If supply voltage reduces, pulsating current increases.From another perspective, this circuit is the circuit of a negative resistance charactertistic, if design suitablely, when supply voltage changes within the specific limits, it is stable that the power of circuitry consumes can keep.
If supply voltage is constant, load L 1the load of this circuit is done in series connection with resistance R, and in the process that R resistance is changed from small to big, the electric current of circuit increased before this gradually, and after increasing to a certain value (maximum), the electric current of circuit reduces gradually.This is because work as L 1after series resistance, the resistance of R hour, R and L 1after series connection, pass through L 1electric current by zero, to increase to time of control pass value elongated, pulse broadens, duty ratio increases, the increase of concussion electric current.After R increases to a certain value, circuit stops shake, stops the critical condition of shake at circuit, and the electric current of circuit reaches maximum, and when stopping shaking, 666 in through normally on, then increases the resistance of R, and electric current will reduce gradually.That is to say L 1after series resistance R, when the resistance of R hour, circuit is in concussion state, the resistance value of R increases, concussion electric current increases; When the resistance of R is larger, circuit stops shake, and 666 all the time in conducting state, and the resistance of R increases, and electric current just reduces.In the resistance of R, hour circuit is in concussion state, and this changes section the resistance of R, and IND oscillating circuit can be regarded as negative resistance state.Here, R and L 1connect, L 1induction reactance and the impedance of resistance R circuit is affected, be to be decided by their size.If L 1inductance value very little, resistance R is load, allows circuit working in stopping shake state, so, this circuit is exactly a load short-circuit protection circuit.This protective circuit can initialization circuit maximum current, when load is short-circuited, the electric current of circuit is very little, is the short-circuit protection circuit of load.
Above 2 IND oscillating circuits that all show with inductive load, have negative resistance charactertistic, and it has application when making current stabilization, power stabilize circuit.
Embodiment bis-, and accompanying drawing 5 is IND speed-stabilizing circuit electrical schematic diagrams, and load is by L 2, DJ forms, DJ is direct current machine, R 4be sample resistance, sampling, from the voltage at motor two ends, is adjusted R 4can change the output voltage of circuit, adjust the voltage at motor two ends, can adjust the rotating speed of motor.Operation principle is, when electric machine rotation, the two ends of motor produce voltage, and the rotating speed of motor is the principal element that affects the height of motor both end voltage, stablizes the voltage at motor two ends, just can stablize the rotating speed of motor.After switching on power, delayed start-up circuit makes 666 conductings through time delay, and power supply is through L 2, 666 to motor, power up, electric machine rotation raises the voltage at motor two ends, when the value of the voltage at motor two ends is elevated to that sampling control closes that circuit sets control pass, 666 turn-off, when the lower voltage at motor two ends is following to control pass value, delayed start-up circuit makes 666 conductings through time delay, and 666 such conducting and shutoffs, make motor two ends obtain stable voltage.The rotating speed of motor is relevant with the voltage at motor two ends, and 666 make the voltage stabilization at motor two ends, and the rotating speed of motor just can be stablized.
In 666 conduction periods, supply voltage is approximately equal to L 2the voltage at two ends adds the voltage (666 pressure drop is little) at motor two ends.L 2be inductance, by its electric current, can not suddenly change, after circuit turn-on, the electric current of circuit is can't moment excessive.L when 666 conducting 2carried a part of supply voltage, made the voltage stabilization at motor two ends; And when 666 conducting, saved energy, in 666 passes, had no progeny, this part energy passes through sustained diode 2send into motor.Here L 2having played voltage corrective action, is that voltage is adjusted element, and when 666 conducting, inductance, when playing corrective action, has also been stored a part of magnetic energy, and these magnetic energy pass through D 2reach utilization.The D.C. resistance of inductance is very little, and energy loss is very little, and circuit is as inductance, to adjust the energy-saving circuit of element.
This is a switch speed-stabilizing circuit.Also be series connection speed-stabilizing circuit, adjusting element is inductance.
In the present embodiment, L 2be the auxiliary equipment of motor, only have and select suitable L 2, set suitable delayed start-up circuit, just can obtain satisfied effect.
Embodiment tri-, and accompanying drawing 6 is IND voltage stabilizing and voltage stabilizing start-up circuit electrical schematic diagram A.R 5role is metering function, and it can limit the maximum current that flows through 666, with protection power source and load.R 6be sample resistance, adjust R 6can set output voltage; C 2, FZ 3form capacitive load, in fact, C 2can be included in FZ 3in, just for the convenience of following narration, using it as one independently electronic original part draw.Operation principle is, after switching on power, delayed start-up circuit makes 666 conductings through time delay, and power supply is through R 5, 666 couples of C 2charging.Work as C 2voltage while being elevated to the control pass value of 666 settings, sampling control is closed circuit and is made 666 shutoffs, 666 close and have no progeny, C 2lower voltage, work as C 2voltage when following lower than control pass value, delayed start-up circuit is delayed again makes 666 conductings, power supply through 666, R 5give again C 2charging, like this C 2repeated charge, make C 2the voltage stabilization at two ends, load FZ 3the voltage stabilization at two ends.This circuit is the continuously adjustable switch voltage-stabilizing circuit of output voltage, R 5shield.
If FZ 3the voltage at two ends is always higher than control pass value, and 666 always in off state so, R 5no current flows through, and load just no longer consumes the energy from stabilized voltage power supply.666 self power consumptions can arrange very littlely (can arrive a microampere order of magnitude).Whole voltage stabilizing circuit own loss when not power consumption of load is very little.
If at FZ 3two ends are added with the voltage of other exterior power supply, and during voltage higher (closing voltage higher than the control of setting), 666 always in off state, and the power consumption of IND voltage stabilizing circuit is seldom.
Accompanying drawing 7 is IND voltage stabilizing circuit electricity principle B, is another voltage stabilizing circuit, and operation principle is, after switching on power, 666 conductings after time delay, power supply through 666, L 3give C 3serve as, when the value of supply voltage reaches that circuit sets control pass, 666 shutoffs, work as C 3when the voltage drop at two ends is following to control pass value, 666 understand again through time delay, conducting to C 3charging, makes C 3the voltage stabilization at two ends, load FZ 4it is stable that the voltage at two ends keeps.L 3, D 3operation principle identical with embodiment 2.This is tandem tap voltage stabilizing circuit, and adjusting element is inductance.
Embodiment tetra-, in IND voltage stabilizing start-up circuit electrical schematic diagram A circuit, if FZ 3be can starting load, during control pass value that the voltage a little higher than 666 that the load after startup produces is set, as mentioned above, 666 always in off state, and load is the energy of electric consumption no longer.The online loss of voltage stabilizing start-up circuit is just very little.So, this 666 voltage stabilizing circuit is exactly a voltage stabilizing start-up circuit.
So-called startup is exactly only to need to provide initial energy.If the energy self producing after load starts can be self-supporting, so, start-up circuit just should be after load starts, the Power supply of cutting off the electricity supply to load.If can't cut the source of this electric current, just cause waste.
In a lot of electric equipments, for example, television set, charger, low-tension supply etc.Civil power obtains 300 through rectifying and wave-filtering vleft and right direct voltage, these are 300 years old vthe voltage of left and right also will be transformed into the DC power supply of low voltage, supplies with inside electric appliance electricity consumption.Translation circuit needs to start.Conventional method is by 300 vthe voltage of left and right starts low-tension supply after resistance step-down, and Here it is so-called resistance starting circuit, after load is activated, still has very large voltage drop on starting resistance, and starting resistance still has electric current to pass through, loss electric energy.If replace resistance starting circuit with this money start-up circuit, can greatly save the online energy consumption of former start-up circuit.This is a energy-conservation circuit.Saving, without minor matter, in actual applications, can be simplified voltage stabilizing start-up circuit, saves cost, uses its energy-conservation money that also saves.
Embodiment five:
Accompanying drawing 8 is a IND current stabilization circuit electrical schematic diagrams.It can be when mains voltage variations and load variations steady load electric current.
In accompanying drawing 8, C 5it is the filter capacitor of load pulsating current; FZ 5general load, R 8current-limiting resistance, R 9sample resistance, C 4r 9filter capacitor, C 4two ends produce stable voltage, and its operation principle is as embodiment tri-.R 9the voltage stabilization at two ends, passes through R 9electric current just stable.Because R 9connect with load, the electric current of load and pass through R 9electric current substantially equal, so by load FZ 5electric current be exactly galvanic current stream.
In the electrical schematic diagram of accompanying drawing 8, R 8be current-limiting resistance, consume certain electric energy.So this current stabilization circuit is mainly used in the current stabilization load that bearing power is less.
The steady power transformation of the IND road of steady load is 666 another current stabilization circuits as main circuit, power stabilize circuit.It forms and operation principle separate case is declared.

Claims (9)

  1. The multiplex circuit of 1.IND, its architectural feature is comprised of DC power supply, IND basic circuit, load (comprising auxiliary equipment).DC power supply, IND***, load interconnect.
  2. 2. as claimed in claim 1, IND basic circuit (IND***), its architectural feature is comprised of time control circuit 2, sampling control circuit 3, switching circuit 4.IND*** is between power supply 1 and load 5.Sampling control circuit 3, switching circuit 4 are connected with load, and power supply 1 is connected with sampling control circuit 3, time control circuit 2, switching circuit 4, load 5.
  3. 3. as claim 1, described in claim 2, IND666, its architectural feature is, by delayed start-up circuit 2, sampling control close circuit 3, switching circuit 4 forms, delayed start-up circuit 2, sampling control are closed circuit 3 and are connected with switching circuit.IND666 is connected between power supply 1 and load 5, and IND666, power supply, load interconnect.
  4. 4. as claim 1, described in claim 3, the feature of 666 delayed start-up circuit is, can be that the variation with supply voltage changes its time of delay, can be also a stable time of delay.
  5. 5. according to claim 1, described in claim 3, IND oscillating circuit, is characterized in that, power supply, 666, capacitive or inductive load, consists of.
  6. 6. according to claim 1, described in claim 3, IND speed-stabilizing circuit, is characterized in that, power supply, 666, inductance, fly-wheel diode and motor, consists of.
  7. 7. according to claim 1, described in claim 3, IND voltage stabilizing circuit, is characterized in that, power supply, 666, inductance, fly-wheel diode, capacitive load, consists of.
  8. 8. according to claim 1, described in claim 3, IND voltage stabilizing start-up circuit, is characterized in that, by power supply, 666, can form by starting load.
  9. 9. according to claim 1, described in claim 3, IND current stabilization circuit, is characterized in that, power supply, 666, sample resistance and filter capacitor, load and load filter capacitor, current-limiting resistance, consists of.
CN201310216379.5A 2013-06-04 2013-06-04 IND multipurpose circuit Pending CN104218928A (en)

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Application Number Priority Date Filing Date Title
CN201310216379.5A CN104218928A (en) 2013-06-04 2013-06-04 IND multipurpose circuit

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Application Number Priority Date Filing Date Title
CN201310216379.5A CN104218928A (en) 2013-06-04 2013-06-04 IND multipurpose circuit

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001668A (en) * 1973-11-16 1977-01-04 Schick Incorporated Electric shaver operable from a wide range of supply voltages
CN87103527A (en) * 1986-05-15 1987-11-25 菲利浦光灯制造公司 Power circuit
CN1039159A (en) * 1988-06-28 1990-01-24 明昌连 Gated separable power adapter
CN2082911U (en) * 1990-09-15 1991-08-14 马军兴 New style over-load and short-circuit protective device for transistors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001668A (en) * 1973-11-16 1977-01-04 Schick Incorporated Electric shaver operable from a wide range of supply voltages
CN87103527A (en) * 1986-05-15 1987-11-25 菲利浦光灯制造公司 Power circuit
CN1039159A (en) * 1988-06-28 1990-01-24 明昌连 Gated separable power adapter
CN2082911U (en) * 1990-09-15 1991-08-14 马军兴 New style over-load and short-circuit protective device for transistors

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