CN1065960A - Induced current switching system and method for switching - Google Patents
Induced current switching system and method for switching Download PDFInfo
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- CN1065960A CN1065960A CN92101843A CN92101843A CN1065960A CN 1065960 A CN1065960 A CN 1065960A CN 92101843 A CN92101843 A CN 92101843A CN 92101843 A CN92101843 A CN 92101843A CN 1065960 A CN1065960 A CN 1065960A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
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Abstract
The inductor in parallel with a capacitor.By relative direction for this reason inductor first and second current source of electric current is provided.Allow this inductor and the capacitor a period of time interior resonance in the middle of the electric current of using first and second current source, realize electric current commutation fast thus.
Description
The present invention relates to the current switch that inductor is used, more particularly, relate to the fast current switch that inductor is used.
In inductive load, the quick commutation of electric current is a complex engineering problems of multiple electric power of restriction and Mechatronic Systems performance.Such type systematic comprises brushless direct-current (DC) motor, stepping motor, voice coil motor and magnetic head.
Brushless DC motor and stepping motor turn round according to the principle that produces power between electromagnet and permanent magnet repeatedly.Typically situation is, one group of magnet is arranged with mechanical load movement, and another group magnet then keeps static.The electromagnet group here is to start on a polarity, is produced the gravitation to the downstream permanent magnet.Along with above-mentioned motion makes two groups of magnet meetings fashionable, the electric current in the electromagnet just can commutate suddenly owing to the commutation of winding current.At this moment, electromagnet will attract the permanent magnet in next piece downstream, produce the motion in the same direction.The commutation of intermittent current repeatedly is up to obtaining desirable motion result.Consider that from the electricity viewpoint winding of this class motor is representing to drive its circuit inductance load.
The United States Patent (USP) of kaszman No. 4584506 (1986,4,22), people's such as Bergstrom United States Patent (USP) No. 4710691 (1987,12.1) and Nebgen in " IBM Technilol Disclosure Bullefin ", 24 the volume, the 1A phase (1981,6) disclosed technology in has all been set forth the inductor drive circuit that motor is used in the prior art.
The winding of magnetic head is also represented the inductive load of drive circuit morning at record data.Traditionally, such inductance feature is being confined under the typical supply voltage, and the rise time of electric current is restricted.The magnetic field that is produced by this magnetic head is proportional to the electric current in the magnetic head winding, and the inductance of magnetic head is then limiting the data rate of whole register system.
On inductance problem in the magnetic head each link in disc unit industry all is conspicuous.Small-sized disc unit adopts ferrite head usually, and the latter has very high inductance (several microhenry), thereby data rate is restricted to about 1.25 million ratio/seconds.One of method that solves is to adopt the film magnetic head with low inductance, and is many but price will be high.
Known already, in this kind technology, can realize faster switch by improving supply voltage.High voltage source is very expensive and insecure, and is can not be used for most of covers within the computer housing of disc unit.In addition, by power supply among the very big voltage drop on ground, can consume bigger power.For small-sized, battery powered portable disk machine can't be realized especially big like this power.
The inductance that can prove magnetic head by constant computing time (inductance/resistance) can provide constraints to data speed.For example, typical ferrite head has the inductance of 2.5 microhenrys (UH), in order to reach the electric current that the record field intensity then needs 50 milliamperes (mA).If supply voltage is 3 volts after the voltage of disc unit descends, then earth resistance is 60 Europe (ohm), causes the rise time (L/R) to equal 40 nanoseconds (ns).This rise time is to be enough for the data rate that only was 1.25 million ratio/seconds under 3 megahertzes (MHz) in frequency.
People such as Baileg are at " IBM Technilal Disclosare Bulletiu ", and 23 volumes in 11 phases (1981,4), have provided a kind of typical inductor drive circuit that magnetic head is used in the prior art.
In order to improve the performance of motor and magnetic head and so on electric device, need a kind of inductor drive circuit that can realize the high current switching rate.
According to the present invention, making an electric capacity is that capacitor and the inductance of C is that the inductor of L is in parallel.On this inductor, connecting first and second switch.First switch connects one first current source, electric current is provided for this inductor by a first direction.Second switch connects one second current source, presses second direction inductor supply of current for this reason.On these two first and second switches, be connected with an on-off controller, be used for controlling their timing switching.This kind on-off controller alternately disconnects with closed above-mentioned first and second switch successively, and between the moment of the moment of a switch disconnection therein and another switch closure, waits for π (LC)
1/2A period of time second.The result is that the present invention has utilized the resonance between this inductor and the capacitor, gets so that the sense of current in the inductor commutates fast.
For ease of understanding essence of the present invention and advantage more all sidedly, the detailed description that should do referring to following connection with figures.In the accompanying drawings,
Fig. 1 is the circuit diagram of explanation operation principle of the present invention;
Fig. 2 is a curve chart regularly, and the relation of the voltage and current in aforementioned two switches and inductor among the present invention is described;
Fig. 3 is the circuit diagram of one embodiment of the invention;
Fig. 4 is the circuit diagram of another embodiment of the present invention;
Circuit diagram when Fig. 5 is used for a stepping motor for the present invention;
Fig. 6 A is the electric current one time graph figure of a motor in the prior art;
Fig. 6 B is the voltage one time graph figure of a motor in the prior art;
Fig. 7 A is the electric current one time graph figure of a motor among the present invention;
Fig. 7 B is the voltage one time graph figure of a motor among the present invention;
Fig. 8 A is the electric current one time graph figure of a motor among the present invention;
Fig. 8 B is the voltage one time graph figure of a motor among the present invention;
Fig. 9 be the present invention be used for a register system the time circuit diagram;
Figure 10 A is the electric current one time graph figure of a magnetic head in the prior art;
Figure 10 B is the voltage one time graph figure of a magnetic head in the prior art;
Figure 11 A is the electric current one time graph figure of a magnetic head among the present invention;
Figure 11 B is the voltage one time graph figure of a magnetic head among the present invention;
Figure 12 A is the electric current one time graph figure of a magnetic head among the present invention;
Figure 12 B is the voltage one time graph figure of a magnetic head among the present invention; And
Figure 13 is the circuit diagram of another embodiment of the present invention.
Most preferred embodiment of the present invention is described below.
Fig. 1 shows clear a kind of Generalized Circuit of the present invention, indicates with a total reference number 10.This circuit 10 comprises that an inductance is the inductor 12 of L, and the latter and an electric capacity are that the capacitor 14 of C is in parallel.Current source 20 is connected with inductor 12 through switch 22.This current source 20 provides electric current in a first direction inductor 12.Current source 24 is connected with inductor 12 through switch 26.This current source 24 is supplied with inductor 12 electric currents in a second direction.
Fig. 2 is the curve chart that shows circuit 10 timing relationships.Line 50 expression switches 22 are with respect to the position of time.Line 52 expression switches 26 are with respect to the position of time.The voltage and the time relation at line 60 expression inductors 12 two ends.Line 62 expressions are by electric current and time relation in the inductor 12.
The operation principle of circuit 10 can be described now.The present invention utilizes the resonance between inductor 12 and the capacitor 14 to realize that the electric current in the inductor 12 commutates fast.Switch 22 and 26 disconnection half overlap with the harmonic period of 14 in inductor 12 and capacitor in time with closed.If T is the transfer time between corresponding magnetic field, promptly energy flow to the time that capacitor 14 returns inductor 12 again from inductor 12.So T=π (LC)
1/2Disconnect one of in this two switch and another closure between time (t
2-t
3With t
4-t
5) be set at and equal T approx.
Fig. 3 is the schematic diagram of a kind of optimal circuit of the present invention, is indicated by a total reference number 100.Inductance is that inductor 102 and the electric capacity of L is that the capacitor 104 of C is in parallel.Voltage source 110 connects first side of upright inductor 102 through a P-channel field-effect transistor (PEFT) transistor 112 and a diode 114.Between second side of voltage source 110 and inductor 102, be connected with a P-channel field-effect transistor (PEFT) transistor 116 and a diode 118.On first side of inductor 102, connect a N slot field-effect transistor 122.Between this transistor 122 and ground, be connected a resistor 124, between second side of this resistor 124 and inductor 102, then be connected N slot field-effect transistor 126.112,116,122 and 126 in transistor is mos field effect transistor preferably.
Introduce the operation of circuit 100 below.At first,, one positive X signal is applied on the grid of transistor 112 and 122, at node 142 places one zero X signals is applied on the grid of transistor 116 and 126 simultaneously at node 140 places in moment t1.Transistor 112 and 126 and driving transistors 116 and 122 have not been driven.Electric current flow in the ground with resistor 124 through transistor 112, diode 114, inductor 102, transistor 126.This electric current inductor 102 of flowing through from left to right.
In moment t
2, reverse above-mentioned two signals.Now positive X signal is added on transistor 116 and 126, and zero X signal is added on transistor 112 and 122. Transistor 116 and 126 and driving transistors 112 and 122 have not been driven.But diode 118 will block the electric current that flows out from transistor 116.The electrical property of this diode is, when the voltage above it flows blocking current when negative.At moment t
2With t
3Between (see figure 2), diode 118 will be through pressing a negative voltage, do not allow constant current to flow into inductor 102.Inductor 102 is isolated with capacitor 104, and resonance will take place.Electric energy is transferred to capacitor 104 from inductor 102 and returns then, by reverse drive inductor 102.The time of finishing this operation is the cycle or the T=(LC of above-mentioned resonance)
1/2Partly.In moment t
3, the voltage at inductor 102 two ends is zero once more.Diode 118 will no longer experience a negative voltage, will allow this moment electric current to flow out from transistor 116, through inductor 104, from right to left, flow through transistor 122 and resistor 124 to ground.This electric current of flowing through inductor 102 commutated already.
If wish to change the sense of current once more, can be at moment t
4, positive Z signal is added on transistor 112 and 122 once more, simultaneously zero Z signal is added on transistor 116 and 126. Transistor 112 and 126 is driven, and transistor 116 and 122 then is not driven.Diode 114 stands a negative voltage at this moment also will be at moment t
4With t
5Between blocking current.Inductor 102 is handed over this isolation again with capacitor 104, and will be with a period of time T=π (LC)
1/2Resonance.In moment t
5, diode 114 has experienced no-voltage, and electric current will be flowed out from transistor 112, through inductor 102, from left to right, by transistor 126 and resistor 124 to ground.
It relatively is useful that circuit 100 is done one with Generalized Circuit 10. Transistor 112 and 126 is equivalent to switch 22. Transistor 116 and 122 are equivalent to switch 26. Diode 114 and 118 provides timing controlled for these two switches effectively.So not complicated timing circuit, it is minimum and can realize the circuit that compacts that fast current commutates in inductor that the result obtains a kind of element number.
Fig. 4 shows bright another kind of circuit of the present invention, is marked with total reference number 200.Inductor 202 and an electric capacity that with an inductance is L is that the capacitor 204 of C is in parallel.First end of this inductor 204 is connected to a voltage source 210, and the voltage of this voltage source is VS/2.220 second sides that connect main inductor 202 through a resistor 221, P ditch field-effect transistor 222 and diode 224 of voltage source.Between diode 230 and ground, be connected a N ditch field-effect transistor 232. Transistor 222 and 232 is mos field effect transistor preferably.
The work of circuit 200 and circuit 100 are similar.In moment t
1, a positive signal Z is added on the grid of transistor 222 and 232.Driven transistor 222 and driving transistors 232 not.Electric current flows out from voltage source 220, through resistor 221, transistor 222, diode 224, and by inductor 202, from left to right, to voltage source 210.At moment t
2, zero-signal is added on transistor 222 and 232.Transistor 232 is driven, and transistor 222 outer not being driven.Diode 230 is at moment t
2With t
3Between stoping electric current to flow, inductor 202 is met resonance π (LC) with capacitor 204 simultaneously
1/2Second.In moment t
3, electric current 210 flows out from the source, through inductor 202 from right to left, by diode 230, transistor 232 to ground.In moment t
4, once more positive signal Z is added on transistor 222 and 232.Transistor 222 is driven encourages, and transistor 232 is not driven.Diode 224 is at moment t
4With t
5Between stop electric current to flow, and inductor 202 and capacitor 204 resonance π (LC)
1/2Second.In moment t
5, electric current is from transistor 222 diode 224 of flowing through, through inductor 202, from left to right, to voltage source 210.
Following the analysis showed that adopts the present invention to be better than the prior art part.Relevant physical quantity is defined as down:
The L=winding inductance,
The series resistance that R=is total,
Electric current in the I=winding,
The rise time of RT=electric current,
The Vs=supply voltage
The C=resonant capacitance
The amplitude of Vi=induced potential
Below fundamental relation between the physical quantity of the of the present invention and prior art of each The Representation Equation:
1/2＊CVi
2＝1/2＊LI
2，
RT=L/R is for prior art; And
RT=π (LC)
1/2, for the present invention.
The required time of electric current commutation can be derived by above fundamental equation, provide
RT=LI/VS is for prior art; And
RT=π LI/Vi is for the present invention.
Rise time of the present invention is excellent than prior art, is π Vs/Vi times of the latter.Consider a kind of stepping motor that 12 volts of power supplys are arranged.Can support the components and parts that comprise diode and transistor of utilization, can under 360 volts of induced potentials, operate.Therefore, the present invention is got on very well, the switching rate of above-mentioned motor can improve 8.5 times.
The magnetic head that has 5 volts of power supplys again.Be easy to obtain can operation under 300 volts of induced potentials magnetic head with have and components and parts.Utilize the present invention, the switching rate of said head can improve 14 times.
Fig. 5 has schematically shown step motor system of the present invention, indicates with total reference number 300.System 300 comprises a mechanical type stepping motor 310, a kind of STH-39D002 motor that this can adopt Japanese Shimano Kenshi company to produce.Motor 310 has a p-m rotor 312 and a collection of magnetic winding 314 and 316.For ease of diagram, two windings 314 and 316 have only been shown.As known in this technology, winding 314 and 316 is comprising numerous staggered coilings of connecting and being ranked around rotor 312 peripheries.
Between voltage source 362 and ground, be connected a bipolar transistor 360.Crystal is being connected transistor 324 and 326 with 360.364 of bipolar transistors are connected between voltage source 366 and the ground.Transistor 364 is connecting transistor 328 and 330, and bipolar transistor 370 is connected between voltage source 372 and the ground.This transistor 370 is also connecting transistor 354 and 356.Bipolar transistor 374 is connected between voltage source 376 and the ground.This transistor 374 is also connecting transistor 358 and 360.
Connect transistor 360 and 364 with a bistable multivibrator 380.Connect transistor 370 and 374 with a bistable multivibrator 382 simultaneously.With the pulse input of a converter 386 connections with bistable multivibrator 382.390 of square wave generators are connecting the clock input and converter 386 of bistable multivibrator 380.
Can come the operation of recognition system 300 now.Generator 390 is exported a square wave signal under frequency 2F.This signal provides clock for bistable multivibrator 380.This signal is converter 386 conversion, clock is provided for bistable multivibrator 382.Bistable multivibrator 380 outputs one phase place a-signal is given transistor 360, exports a phase place a-signal and gives transistor 364.Phase place A and A are rectangular wave under frequency F, are the phase differences that 180 degree are arranged.Bistable multivibrator 382 outputs one phase place B signal is given transistor 370, exports a phase place B signal and gives transistor 374.Phase place B and B signal are rectangular wave under frequency F, have the phase difference of 180 degree.Phase place B signal lag is in phase place a-signal 90 degree.Phase place A and a-signal are short to cause transistor 360 and 364 to be similar to for the 100 described operations of circuit among Fig. 3, the alternately transistor of drive circuit 320. Short transistor 370 and 374 of causing of phase place B and B signal, with to Fig. 3 in regard to circuit 100 described similar operation, the alternately transistors of drive circuit 350.The result commutates the electric current in winding 314 and 316 fast, and wherein the commutation of the electric current in the winding 314 lags behind electric current commutation 90 degree in the winding 316 on phase place.This electric current commutation makes and is driving rotor.In this technology, commutate drive motor to belong to known knowledge by electric current.But the circuit 320 and 350 among the present invention but can make winding 314 and 316 drive under much higher frequency, so just can improve the maximum (top) speed of motor 310 greatly.
In another embodiment, the circuit among Fig. 4 200 can be used to the circuit 320 and 350 in the replacement system 300.In this case, only require the signal of phase place A and phase place B.
Fig. 6 A and 6B have shown in the prior art that a kind of voltage of inductor winding of typical stepping motor and electric current are with respect to time relation.This inductor winding is driven by H type standard drive circuit known in this technology, and the flank speed the during work of this kind stepping motor is 600 step bps, and inductor is 600 hertz of excitations down.This inductor can not encourage with faster rate.Notice swinging to quite low of electric current, and the leapfrog in the current signal is about 7.0 milliseconds.
Fig. 7 A and 7B show that voltage and electric current are with respect to time relation in the inductor 316 of understanding system 300.This motor is also with 600 step bps operations (is 600 hertz for inductor 316).Generator 390 is to drive down at 1200 hertz.Can notice very rapid current reversal.
Fig. 8 A and 8B show that equally the voltage of bright system 300 and electric current are about time relation.The motor here is the speed operation (is 1500 hertz for inductor 316) by 1500 step bps.Generator 390 is to drive down at 3000 hertz.Notice that swinging to of electric current is still very rapid.The present invention's electric motor system 300 can make the rate capability of this kind motor improve 2.5 times.
Fig. 9 shows the schematic diagram of bright the present invention's one digital data recording system, indicates with total reference number numbers 400.System 400 comprises that one is installed on recording disc 402 on the vertical shaft 404 with rotary way.Recording disc 402 can be an ordinary magnetic disc.Axle 404 is hinged with one and drives on the spindle drive motor 406 of its rotation.Motor 406 is attached on the disc driver 410, and voice coil motor 412 is attached on the transmission arm 414.Voice coil motor 412 just arm 414 on disk 402 according to radial motion, on the end of arm 414, installing magnetic head 416, on electricity, it is seen as the winding of an inductor.
Circuit 430 comprises a voltage source 432, transistor 434,436,438,440, pair of diodes 442 and 444, resistor 446, capacitor 448 and magnetic head 416.Circuit 430 is similar with the circuit 100 among Fig. 3, but this magnetic head 416 has been changed inductor 102.Between voltage source 462 and ground, be connected a bipolar transistor 460.Be connected on transistor 434 and 436 at transistor 460.Between voltage source 472 and ground, be connected a bipolar transistor 470.Transistor 470 is connecting transistor 438 and 440.There is a converter 480 to link to each other with transistor 470.There is a data line 482 connecting transistor 460 and converter 480 simultaneously.
Can come the operation of recognition system 400 now.Be added on the transmission line 482 with numerical data.Bipolar transistor 460 and 470 respectively with similar for the 100 described operations of circuit among Fig. 3.Alternately driving transistors 434,436,438 and 440.So the electric current in the inductor magnetic head 416 is oppositely gone into data record to disk 402 rapidly.
In another embodiment, the circuit 430 that can use the circuit 200 among Fig. 4 to replace in these systems 400.
Figure 10 A and 10B have shown the electric current of used magnetic head and the oscillogram of voltage in the traditional recording system.The inductance of magnetic head wherein is the L=2.5 microhenry, and resistance R=4.3 Europe.This magnetic head drives with 4 megahertzes.Notice swinging to quite low of electric current.
Figure 11 A, 11B12A and 12B show the electric current of magnetic head 416 in the bright system 400 and the oscillogram of voltage.This magnetic head 416 adopts the front to be used to measure same a kind of inductor magnetic head of purpose in Figure 10 A and 10B.Magnetic head 416 drives under 4 megahertzes in Figure 11 A and 11B, drives under 8 megahertzes in Figure 12 A and 12B.Waveform quality among Figure 12 A and the 12B is enough to guarantee recording frequency, and shows with respect to the custom circuit frequency and double at least.
Figure 13 shows the circuit diagram of understanding another embodiment of the present invention, is marked with total reference number 500.The element of circuit 100 is similar among the element of circuit 500 and Fig. 3, adds in the upper right corner of corresponding reference number to cast aside to indicate.Have in the circuit 500 one be connected node 140 ' and transistor 112 ' delay line 510, and be connected node 142 ' and transistor 116 ' between delay line 512.Also can adopt the signal delay device of other type.
When requiring the current switch of high frequency, also can adopt the electricity we 500.When frequency was lower than 1 megahertz, the element of circuit 100 played the effect of approximate ideal element.But when this kind switching frequency surpassed 1 megahertz, because the non-linear behavior of transistor AND gate diode, said elements just can not carry out work so ideally.The cause of this kind non-linear behavior is electric charge and the electricresistance effect stored, and their can cause a kind of and phase shift time correlation in electric current and voltage waveform.
Electricity we 500 by to transistor 112 ' with 116 ' provide delay slightly to signal.This kind delay is the very little percentage of circuit cycles time.In a most preferred embodiment, such delay might reach 10 to 20 nanoseconds.So little delay makes the LC(LC of this circuit) part pre-charge before resonance takes place for it.The result of photoelectricity makes the voltage and the current waveform generation phase shift of circuit effectively in advance, the phase shift that causes with the compensating non-linear effect.
Although by accompanying drawing in detail most preferred embodiment of the present invention has been described in detail, obviously, any people who is familiar with this technology can make change and modification to these embodiment in not breaking away from the scope that the present invention stated by the appended claim book.
Claims (20)
1, a kind of induced current switching system is characterised in that to include: inductance is the inductor of L;
The electric capacity in parallel with inductor is the capacitor of C;
Be connected the current source that electric current is provided for it according to one first and second direction with inductor;
The current control device that is connected with current source, it allows electric current to flow through this inductor in first direction, stops the about π of this electric current (LC)
1/2Second, make electric current flow through this inductor then with second direction.
2, the system as claimed in claim 1 is characterised in that: above-mentioned current control device is made up of transistor.
3, the system as claimed in claim 1 is characterised in that: above-mentioned current control device comprises pair of diodes.
4, the system as claimed in claim 1 is characterised in that this system also comprises stepping motor, and above-mentioned inductor is the winding that this stepping electricity is advised machine.
5, the system as claimed in claim 1 is characterised in that: it comprises a magnetic data storage device, and the aforementioned electric sensor is the converter head of this storage device.
6, a kind of induced current switching system is characterised in that: it includes an inductance is that the inductor of L and electric capacity in parallel with it are the capacitor of C; First diode that connects of inductor first side therewith; Second diode that connects of inductor second side therewith; Be connected in the voltage source the first transistor between first diode therewith; Be connected in this voltage source transistor seconds between second diode therewith; Be connected in ground the 3rd transistor between inductor first side therewith; Be connected in ground the 4th transistor between inductor second side therewith; And a kind of solid-state control that links to each other with first, second, third and fourth transistor, be used for driving the first and the 4th transistor and do not drive the second and the 3rd transistor, and then drive the second and the 3rd transistor, but do not drive the first and the 4th transistor.
7, system as claimed in claim 6, be characterised in that: it comprises stepping motor, and aforesaid inductor is the winding of this stepping motor.
8, system as claimed in claim 6 is characterised in that: it comprises a kind of magnetic data storage device, and aforesaid inductor is the converter head of this data storage device.
9, system as claimed in claim 6 is characterised in that: it comprises first delay device that is connected between described solid-state control and the first transistor.
10, system as claimed in claim 6 is characterised in that: described solid-state control has time compensation between the first and the 4th transistorized switch and the second and the 3rd transistorized switch.
11, a kind of induced current switching system is characterised in that: it comprises that an inductance is that inductance and an electric capacity in parallel with it of L is the capacitor of C; First diode that links to each other of inductor first side therewith; Second diode that links to each other of inductor first side therewith; The first transistor that links to each other with this first diode with one first voltage source; The transistor seconds that links to each other with ground of second diode therewith; Second voltage source that is connected with above-mentioned inductor second side; And a kind of solid-state control that is connected with aforementioned first and second transistors, be used for driving this first and do not drive this transistor seconds, drive then this second and do not drive this first transistor.
12, system as claimed in claim 11 is characterised in that: it comprises a kind of stepping motor, and said inductor is the winding of this stepping motor.
13, system as claimed in claim 11 is characterised in that: it comprises a kind of magnetic data storage device, and said inductor is the converter head of this data storage device.
14, system as claimed in claim 11 is characterised in that: it includes first delay device that is connected between said solid-state control and the first transistor; And second delay device between this solid-state control and transistor seconds.
15, system as claimed in claim 11 is characterised in that: said solid-state control has time compensation between the first and the 4th transistorized switch and the second and the 3rd transistorized switch.
16, being used for making by an inductance is the method for electric current commutation of the inductor of L, and be characterised in that: it may further comprise the steps, and making an electric capacity is the capacitor inductor parallel connection therewith of C; One first current source is connected on upright this inductor, make electric current comply with a first direction and flow through this inductor; Stopping since then, the electric current of first current source flows; Before permission flow to this inductor according to a second direction from one second current source, wait for one section approximate π (LC)
1/2The time of second.
17, a kind of induced current switching system, be characterised in that: it comprises a kind of data carrier; A kind of inductance is the inductor magnetic head of L; Be connected with medium with said head and be used for telecontrol equipment that this magnetic head is moved on medium; Inductor and the electric capacity that connects are the capacitor of C therewith; First switch that links to each other of inductor therewith; The second switch that links to each other of inductor therewith; First switch links to each other and to be used for providing first current source of electric current to inductor according to a first direction therewith; A second direction second current source of inductor supply people stream is for this reason complied with on second switch phase limit therewith; And a kind of switch controlling device, it is connecting above-mentioned first and second switch and is being used for closed in an alternating manner and this first and second switch of disconnection, makes and pass through π (LC) approximately when these two switches all disconnect
1/2Second.
18, be used for making method by the electric current commutation of an inductor, be characterised in that: it may further comprise the steps, and an inductor, a capacitor and a current source of inductor parallel connection therewith are set; From then on current source with this inductor of electric current supply of one first polarity to produce a magnetic field; Stop the mobile magnetic field commutator that makes of the electric current of this first polarity, in case by the energy between this inductor and capacitor exchange make this magnetic field commutator after, promptly current source is supplied with the electric current of one second polarity to inductor thus, makes this magnetic field of having commutated remain to next time magnetic field commutator.
19, a kind of induced current switching system, be characterised in that: it comprises an inductor; One capacitor of inductor parallel connection therewith; One therewith inductor link to each other and to be used for power supply first and second this inductor of polarity electric current supply; And control device, it links to each other with above-mentioned current source, be used for stopping first this inductor of polarity current direction, make corresponding magnetic field commutator, and the electric current that second polarity is provided remains to next time magnetic field commutator with this magnetic field of having commutated by the exchange energy between this inductor and capacitor.
20, a kind of induced current switching system is characterised in that: it comprises that an inductance is the inductor of L; The electric capacity of inductor parallel connection is the capacitor of C therewith; First switch that links to each other of inductor therewith; The second switch that links to each other of inductor therewith; First switch links to each other by first current source of a first direction to this inductor supplying electric current therewith; Second switch links to each other by second current source of a second direction to this inductor supplying electric current therewith; And the switch controlling device that is connected to this first and second switch, be used for according to over-over mode closure and this first switch of disconnection and then closed and this second switch of disconnection, make and when these two switches disconnections, pass through π (LC) approximately
1/2Second.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68818691A | 1991-04-19 | 1991-04-19 | |
| US688,186 | 1991-04-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1065960A true CN1065960A (en) | 1992-11-04 |
| CN1026452C CN1026452C (en) | 1994-11-02 |
Family
ID=24763464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92101843A Expired - Fee Related CN1026452C (en) | 1991-04-19 | 1992-03-19 | Inductive current switching system and method |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2601968B2 (en) |
| KR (1) | KR960005197B1 (en) |
| CN (1) | CN1026452C (en) |
| CA (1) | CA2061330A1 (en) |
| MY (1) | MY108452A (en) |
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| US11011970B2 (en) | 2017-12-12 | 2021-05-18 | Rohm Co., Ltd. | Gate drive circuit |
| US11482918B2 (en) | 2017-12-12 | 2022-10-25 | Rohm Co., Ltd. | Gate drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI831158B (en) * | 2022-03-22 | 2024-02-01 | 瑞昱半導體股份有限公司 | Comparator-based switched-capacitor circuit and current source thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT367937B (en) * | 1980-07-10 | 1982-08-10 | Friedmann & Maier Ag | CIRCUIT ARRANGEMENT FOR INFLUENCING THE POWER APPLICATION IN A STEPPER MOTOR |
| JP3011399U (en) * | 1994-11-18 | 1995-05-23 | 成昭 松江 | Flash board |
-
1992
- 1992-02-14 JP JP4028054A patent/JP2601968B2/en not_active Expired - Lifetime
- 1992-02-17 CA CA002061330A patent/CA2061330A1/en not_active Abandoned
- 1992-03-19 KR KR1019920004505A patent/KR960005197B1/en not_active IP Right Cessation
- 1992-03-19 MY MYPI92000457A patent/MY108452A/en unknown
- 1992-03-19 CN CN92101843A patent/CN1026452C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611206A (en) * | 2012-03-13 | 2012-07-25 | 崔玉龙 | Kilowatt-level wireless electric energy transmitting device |
| US11011970B2 (en) | 2017-12-12 | 2021-05-18 | Rohm Co., Ltd. | Gate drive circuit |
| US11482918B2 (en) | 2017-12-12 | 2022-10-25 | Rohm Co., Ltd. | Gate drive circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| MY108452A (en) | 1996-09-30 |
| CN1026452C (en) | 1994-11-02 |
| JPH04359697A (en) | 1992-12-11 |
| JP2601968B2 (en) | 1997-04-23 |
| KR920020845A (en) | 1992-11-21 |
| KR960005197B1 (en) | 1996-04-22 |
| CA2061330A1 (en) | 1992-10-20 |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| 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 |