CN203415345U - Bidirectional electromagnet driving circuit - Google Patents
Bidirectional electromagnet driving circuit Download PDFInfo
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- CN203415345U CN203415345U CN201320351547.7U CN201320351547U CN203415345U CN 203415345 U CN203415345 U CN 203415345U CN 201320351547 U CN201320351547 U CN 201320351547U CN 203415345 U CN203415345 U CN 203415345U
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Abstract
The utility model discloses a bidirectional electromagnet driving circuit, comprising a main circuit and a control circuit, wherein 48V direct current voltage in the main circuit is connected with a filter circuit, an H bridge work circuit and a protection and limited current circuit in sequence and is finally connected with an electromagnet; a single chip microcomputer system in the control circuit sends two paths of PWM (pulse-width modulation) signals and one path of direction signal, which are converted into four paths of control signals by the conversion of a logic circuit and the reversed isolation and amplification of an isolation circuit; two paths of the control signals control an MOSFET (metal-oxide-semiconductor field effect transistor) driving circuit while the other two paths of control signals control the other same MOSFET driving circuit; the MOSFET driving circuits are connected with the H bridge work circuit; a parameter adjusting circuit is connected with the single chip microcomputer system. According to the bidirectional electromagnet driving circuit, the PWM is used for driving an H bridge to control the electromagnet to forwards and backwards move, and various parameters of the forward and backward motion can be independently adjusted, and a protection circuit is arranged to prevent the instant induced current, generated during the reversing of the electromagnet, from damaging the circuit.
Description
Technical field
The utility model relates to solenoid driver circuit, especially relates to a kind of electromagnet drive circuit in bi-directional.
Background technology
Electromagnet is, after a kind of energising, ferromagnetic material is produced to suction, electromagnetic energy is converted to the electrical equipment of mechanical energy.The element of electromagnet and operation principle are identical, generally coil, fixed core and moving three major parts unshakable in one's determination, consist of.When coil is by after the electric current of certain numerical value, in fixed core, moving iron core and air gap, just produce the magnetic flux of some, under the effect of magnetic flux, produce a certain size electromagnetic attraction, will move unshakable in one's determination suction to fixed core, thereby make air gap reduce to minimum.After current stops in coil, electromagnetic attraction just disappears.
Electromagnet generally adopts DC power supply, and general electromagnet is all unidirectional electrical magnet, and while not switching on, electromagnet is in reset mode under the effect of External Force Acting, and during energising, electromagnet overcomes external force and moves, after outer power return.How many ferromagnetic sizes of electromagnetism can be controlled by the power of electric current or the number of turn of coil, also can control magnetic size by changing resistance control size of current.
Have recently researcher also by PWM control coil average current, size of current is directly proportional to PWM duty ratio.By the benefit of PWM drive magnet, be to save energy, the convenient size of adjusting electric current.
The bridge-type drive integrated circult chip of IR2110 ShiIR company, it adopts highly integrated level conversion technology, has greatly simplified the control requirement of logical circuit to power device, has improved the reliability of drive circuit simultaneously.The IR2110 power acquisition boostrap circuit of floating, its high-end operating voltage can reach 500V, and operating frequency can reach 500kHz.
Model is that the singlechip chip of MSP430G2553 is the MSP430 of Texas Instrument (TI) series super low-power consumption microcontroller, its maximum feature is super low-power consumption, there are 5 kinds of low-power consumption modes, at standby mode, be that electric current is only 0.5 μ A, and can in the time less than 1 μ s, from standby mode, wake up supper-fastly.Have two 16 Timer_A, exportable 4 tunnels are pwm signal independently.10 200ksps moduluses (A/D) transducer with internal reference, sample & hold and automatic scan function.Above feature can provide lasting, reliable signal for the utility model.
Summary of the invention
The purpose of this utility model is to provide a kind of bidirectional electromagnet drive circuit based on PWM, this circuit can be realized with PWM and drive H bridge, then the positive and negative motion of drive electromagnet, the while can regulate the parameter of PWM independently to control speed, time, the mode of operation of positive and negative motion.
For achieving the above object, the utility model adopts following technical scheme:
The utility model comprises main circuit and control circuit; Wherein:
1) main circuit: comprise filter circuit, H bridge operating circuit, protection and current-limiting circuit; 48V direct voltage successively with filter circuit, H bridge operating circuit, protection be connected with current-limiting circuit, finally connect electromagnet;
2) control circuit: comprise Single Chip Microcomputer (SCM) system, parameter regulating circuit, logical circuit, buffer circuit, MOSFET drive circuit; Single Chip Microcomputer (SCM) system is sent two-way pwm signal He Yi road direction signal Dir, by logical circuit, convert with the reverse isolation of buffer circuit and amplify, convert four tunnel control signals to, wherein two-way is controlled a MOSFET drive circuit, another two-way is controlled another MOSFET drive circuit, two-way MOSFET drive circuit is connected with H bridge operating circuit respectively, and parameter regulating circuit is connected with Single Chip Microcomputer (SCM) system.
For filter circuit in described main circuit, two capacitor C in parallel 11, C12 carry out filtering to 48V operating voltage; The direct current of output is connected with H bridge operating circuit thus, wherein positive pole is connected with the drain electrode of two MOSFET Q1, Q2 of brachium pontis on H bridge, negative pole is connected with the source electrode of two MOSFET Q3, Q4 of lower brachium pontis, between the source electrode of each MOSFET and drain electrode, connects a fly-wheel diode; One end of H bridge operating circuit output and protection are connected with current limliting potentiometer R21 in current-limiting circuit, then connect capacitor C 22 and TVS diode D5 exporting between two ends.
The two-way pwm signal PWM1 that Single Chip Microcomputer (SCM) system in described control circuit is sent, PWM2 He Yi road direction signal DIR, PWM1 is input to 3 pin, 10 pin of 2 pin, 5 pin and the AND OR NOT gate chip U5 of NAND gate chip U6 in logical circuit, PWM2 is input to 5 pin, 13 pin of AND OR NOT gate chip U5 in logical circuit, DIR is input to 1 pin of not gate chip U4,4 pin and 9 pin of 4 pin of NAND gate chip U6, AND OR NOT gate chip U5,1 pin of 2 pin of not gate chip U4 and NAND gate chip U6,1 pin of AND OR NOT gate chip U5 are connected with 2 pin, 6 pin of 6 pin of NAND gate chip, 3 pin and AND OR NOT gate chip, 8 pin difference output signal CTRL1, CTRL2, CTRL3, CTRL4 in logical circuit, CTRL1～CTRL4 carries out signals reverse isolation by optocoupler U7～U10 respectively and amplifies, then by optocoupler 6 pin output signal OUTPUT1～OUTPUT4 separately, OUTPUT1, OUTPUT3 is respectively by driving 10 pin of chip U13 with MOSFET after a filter capacitor filtering, 12 pin are connected, output signal Net3 and Net1 after 1 pin of U13 and 7 pin difference series resistance R22 and R23, resistance R 22, R23 is parallel diode D10 respectively, D11, the 5 pin output signal Net5 of U13, parallel resistance R26 and voltage stabilizing didoe D14 between Net1 and Net5, parallel resistance R27 and voltage stabilizing didoe D15 between Net3 and ground, the upper brachium pontis Q1 of the signal controlling H bridge between Net1 and Net5, the lower brachium pontis Q3 of the signal controlling H bridge between Net3 and ground, two paths of signals OUTPUT2 and OUTPUT4 are input to another identical MOSFET and drive chip U14 in addition, method of attachment is identical with U13, the upper brachium pontis Q2 of the signal controlling H bridge between Net2 and Net6, the lower brachium pontis Q4 of the signal controlling H bridge between Net4 and ground, in parameter regulating circuit, 9 resistance R 1～R9 series connection are carried out dividing potential drop to 2.5V voltage, between every two resistance, connect a button, totally 8 button S1～S8, the button other end is received together by one and is disappeared after trembling capacitor C 2 and be divided into two-way, be input to respectively 3 pin and 5 pin of voltage follower chip U3, 1 pin of U3 is connected with Single Chip Microcomputer (SCM) system AD input port after being connected with 2 pin, U36 pin is connected with 3 pin of comparator chip U2 after being connected with 7 pin, potentiometer R12 will be input to U310 pin after 5V voltage dividing potential drop, 8 pin of U3 are connected with 2 pin of comparator chip U2 after being connected with 9 pin, signal is connected with Single Chip Microcomputer (SCM) system INT input port from the 1 pin output of comparator chip U2, the two one end ground connection of putting switch S 9 of hilted broadsword, after other end connecting resistance R10, connect 3.6V power supply, rocking arm connects Single Chip Microcomputer (SCM) system P1.2 input port, button S10 two ends parallel connection disappears and trembles capacitor C 1, S10 one end ground connection, the other end connects Single Chip Microcomputer (SCM) system START input port.
The beneficial effect the utlity model has is:
1, adopt H bridge to realize the positive and negative motion of electromagnet, and the speed of positive and negative motion and time can independently be controlled and adjust.
2, with pwm signal, carry out drive magnet, the size that the duty ratio by regulating PWM just can regulating magnet operating current, simplifies control.
3, utilize the characteristic that TVS diode can transient absorption surge current, prevent that the large induced current producing when electromagnet is reverse from causing damage to circuit.
4, utilize optocoupler to build buffer circuit, the circuit of buffer circuit input and output connects differently, while effectively preventing work of electromagnet, signal generating source is produced and is disturbed.
5, now many by key control with single IO cause for gossip, improve the utilance of IO mouth.
6, adopt the method that triggers AD sampling after button, reduce AD hits and reduce the burden of Single Chip Microcomputer (SCM) system work.
Accompanying drawing explanation
Fig. 1 is system architecture diagram of the present utility model.
Fig. 2 is Single Chip Microcomputer (SCM) system of the present utility model.
Fig. 3 is parameter regulating circuit of the present utility model.
Fig. 4 is logical circuit of the present utility model.
Fig. 5 is buffer circuit of the present utility model.
Fig. 6 is MOSFET drive circuit of the present utility model.
Fig. 7 is main circuit of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1; the utility model comprises main circuit and control circuit; main circuit comprises: filter circuit, H bridge operating circuit, protection and current-limiting circuit, control circuit comprises: parameter regulating circuit, Single Chip Microcomputer (SCM) system, logical circuit, buffer circuit, MOSFET drive circuit.In main circuit, 48V DC power supply powers to H bridge operating circuit after by filter circuit, is connected afterwards with protection with current-limiting circuit again, finally connects electromagnet.Protection and current-limiting circuit can be protected MOSFET operating circuit, prevent when electromagnet is reverse that the induced voltage of generation or induced current are excessive and cause the damage of MOSFET.In control circuit, Single Chip Microcomputer (SCM) system is sent two-way pwm signal (PWM1, PWM2) He Yi road direction signal (DIR), after three road signals convert by logical circuit and buffer circuit reverse isolation amplifies, convert 4 tunnel control signal OUTPUT1～OUTPUT4 to, wherein two paths of signals OUTPUT1, OUTPUT3 are input to a MOSFET drive circuit, another two paths of signals is input to another identical MOSFET drive circuit, and two MOSFET drive circuits drive the work of H bridge again.Parameter regulating circuit is controlled running status and the parameter of electromagnet by the output signal of control single chip computer system.Wherein MOSFET refers to metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor).
As shown in Figure 2, the Single Chip Microcomputer (SCM) system in the utility model is mainly comprised of singlechip chip U1, power supply circuits, reset circuit.The MSP430G2553 of singlechip chip model WeiTI company, 3.6V voltage is powered to Single Chip Microcomputer (SCM) system after two capacitor filterings.Reset key one termination GND1, the other end connects single-chip microcomputer RESET input port, and reset key two ends are in parallel for eliminating the filter capacitor of key jitter, and when reset key is pressed, Single Chip Microcomputer (SCM) system is restarted immediately.Single-chip microcomputer is exported a road direction signal DIR, and two-way is complementary and with pwm signal PWM1, the PWM2 in dead band.
As shown in Figure 3, in parameter regulating circuit of the present utility model, 9 resistance R 1～R9 carry out dividing potential drop by 2.5V voltage, between every two resistance, connect a button, 8 button S1～S8 altogether, the button other end is received together by a rear positive input terminal that divides two-way to receive two voltage followers of capacitor C 2 of eliminating shake, voltage follower chip model is LM324, inner integrated 4 amplifiers, can be used as 4 voltage followers, 5V voltage is received 4 pin of voltage follower chip U3 after by filter capacitor C4 filtering and is powered to U3, and 11 pin of U3 meet GND1.3 pin that the common point of button divides two-way Hou， mono-tunnel to receive U3,5 pin of U3 are received on another road, and 1 pin of U3,2 pin are input to the AD input port of Single Chip Microcomputer (SCM) system after being connected together, and 6 pin of U3,7 pin are input to 3 pin of comparator chip U2 after being connected together.Connect respectively+5V of potentiometer R12 two ends and GND1, centre tap connects 10 pin of U3, and 8 pin of U3,9 pin are received 2 pin of comparator chip U2 after being connected together.5V power supply is received comparator 8 pin after by a filter capacitor C6 filtering, and comparator 4 pin meet GND1, and 1 pin, by moving 3.6V on a pull-up resistor R11, is then received Single Chip Microcomputer (SCM) system INT input port.In parameter regulating circuit, separately there is a single-pole double-throw switch (SPDT) S9, after the contact resistance R10 of switch one end, connect 3.6V power supply, another termination GND1, switch rocking arm is received the P1.2 input port of Single Chip Microcomputer (SCM) system, button S10 mono-termination GND1, the other end connects the START input port of Single Chip Microcomputer (SCM) system, the button S10 two ends capacitor C 1 of eliminating shake in parallel.In the utility model parameter regulating circuit, the common port that when 8 button S1～S8 press respectively, button is connected together can produce different voltage, this voltage divides two-way, lead up to be input to Single Chip Microcomputer (SCM) system after a voltage follower carry out AD sampling, the voltage follower of separately leading up to is input to the positive input terminal of comparator afterwards, and the reference voltage that potentiometer R12 produces 5V power supply dividing potential drop, reference voltage is input to the negative input end of comparator after voltage follower, voltage and reference voltage that button produces compare rear output interrupt signal, the voltage of button common port when then Single Chip Microcomputer (SCM) system starts to gather button and presses, control again the different operating state of electromagnet.Single-pole double-throw switch (SPDT) S9 is used to refer to electromagnet single step work or continuous operation, and button S10 is only effective when single step is worked, and as single step, starts button.In the utility model parameter regulating circuit, comparator model is LM393.
As shown in Figure 4, the AND OR NOT gate chip U5 that the NAND gate chip U6 that the utility model logical circuit is 74LS04 by a model four input not gate chip U4, model are 74LS00, model are 74LS51 forms, the DIR signal that Single Chip Microcomputer (SCM) system is sent is input to 1 pin of U4,4 pin of 4 pin of U6, U5 and 9 pin, 2 pin of U4 are output, receive 1 pin of U6,1 pin of U5 and 2 pin, the PWM1 that Single Chip Microcomputer (SCM) system is sent receives 3 pin and 10 pin of 2 pin of U6 and 5 pin, U5, PWM2 receives 5 pin and 13 pin of U5, and 11 pin and 12 pin of U5 are received 3.6V.14 pin and 7 pin of chip U4, U5, U6 meet respectively 5V power supply and GND1.6 pin of 6 pin of U6,3 pin and U5,8 pin are output signal CTRL1, CTRL2, CTRL3, CTRL4 respectively.
As shown in Figure 5, optocoupler U7～U10 that the utility model buffer circuit is mainly TLP250 by 4 models forms, 2 pin of each optocoupler are received 3.6V power supply after connecting resistance R13～R16 respectively, CTRL1～CTRL4 tetra-road signals are input to respectively 3 pin of optocoupler U7～U10, 8 pin of four optocouplers connect 15V power supply, 5 pin meet GND2, 6 pin of each optocoupler, difference connecting resistance R17 after 7 pin are connected together, R18, R19, one end of R20, another termination GND2 of resistance R 17～R20, 6 pin of optocoupler U7～U10 are output signal OUTPUT1 respectively, OUTPUT2, OUTPUT3, OUTPUT4.In the utility model buffer circuit, will on optocoupler positive input terminal, draw, signal is inputted from negative input end, with this, strengthens antijamming capability, so the signal of optocoupler output is contrary with input signal.Wherein GND2 is ground connection, is not connected to produce the effect of isolation with GND1.
As shown in Figure 6, driving chip U13, U14 that the utility model MOSFET drive circuit is mainly IR2110 by two models form, 2 MOSFET of each chip controls.Signal OUTPUT1, OUTPUT3 are input to respectively 10 pin, 12 pin of U13 after the filtering by filter capacitor C15, C17, and signal OUTPUT2, OUTPUT4 are respectively by being input to 10 pin, 12 pin of U14 after filter capacitor C16, C18 filtering.15V supply power voltage is respectively by being input to 3 pin, 9 pin, 3 pin of U14,9 pin of U13 after filter capacitor C19, C24, C20, C26 filtering, U13 and U14 2 pin, 11 pin, 13 pin separately all meet GND2,6 pin of U13 and U14 connect respectively the negative pole of diode D6, D7, the anodal 15V power supply that points to of diode D6, D7.5 pin of U13 and U14 are output signal Net5, Net6 respectively, between 5 pin of U13 and 6 pin, meet bootstrap capacitor C23, C27 and voltage stabilizing didoe D8, diode cathode points to 5 pin of U13, between 5 pin of same U14 and 6 pin, meet bootstrap capacitor C25, C28 and diode D9, diode cathode points to 5 pin of U14.7 pin of U13,1 pin of U13,7 pin of U14 are, 1 pin of U14 connects respectively one end of protective resistance R22～R25; the other end of resistance is respectively signal output Net1, Net3, Net2, Net4; resistance R 22～R25 two ends are parallel diode D10～D13 respectively, and diode cathode points to respectively Net1, Net3, Net2, Net4.Net1 and Net2 receive respectively 5 pin of U13 and U14 after connecting resistance R26, R27, Net3 and Net4 meet GND2 after connecting resistance R27, R29 respectively, resistance R 26～R29 two ends parallel voltage-stabilizing diode D14～D17 respectively, the positive pole of voltage stabilizing didoe points to respectively Net5, GND2, Net6, GND2.Voltage stabilizing didoe can be protected MOSFET, prevents that the grid of MOSFET and source electrode are breakdown.
As shown in Figure 7; main circuit of the present utility model mainly consists of filter circuit, H bridge operating circuit, current limliting and protective circuit; filter circuit is comprised of two filter capacitors; 48V power supply is given the power supply of H bridge operating circuit after the filtering of capacitor C 11, C12; 48V positive pole is connected to the upper brachium pontis Q1 of H bridge, the drain electrode of Q2, and 48V negative pole (being GND2) is connected to the source electrode of brachium pontis Q3, Q4 under H bridge, and H bridge operating circuit consists of 4 MOSFET; wherein Q1, Q2 are upper brachium pontis, and Q3, Q4 are lower brachium pontis.Drain electrode to Q1, Q2, the source electrode of Q1, Q2 is connected respectively at the drain electrode of Q3, Q4, the source electrode of Q3, Q4 is received GND2, Net1, Net2, Net3, Net4 receive respectively the gate pole of Q1, Q2, Q3, Q4, Net5, Net6 receive respectively the source electrode of Q1 and the source electrode of Q2, between the drain electrode of MOSFET Q1, Q2, Q3, Q4 and source electrode, connect respectively sustained diode 1, D2, D3, D4, the positive pole of diode points to the source electrode of MOSFET.Protective circuit consists of current limliting potentiometer R21 and TVS diode D5, capacitor C 22, and Net6 connects the one end of receiving electromagnet after potentiometer R21, and another termination of electromagnet is connected with Net5, electromagnet two termination capacitor C 22 and TVS diode D5.
The course of work of the present utility model is as follows:
Single Chip Microcomputer (SCM) system output two-way is complementary and with PWM1, the PWM2 signal He Yi road direction signal DIR in dead band, PWM1 and PWM2 are the initialize signals of drive magnet work, DIR is the index signal of the electromagnet direction of motion, when DIR is high level, electromagnet positive movement, when DIR is low level, electromagnet counter motion, by regulating the duty ratio of PWM can control the size of current that flows through electromagnet, PWM duty ratio is larger, and the electric current that flows through electromagnet is larger.PWM1, PWM2, DIR signal produce 4 road signal CTRL1, CTRL2, CTRL3, CTRL4 after by logical circuit computing, above 4 road signals by 4 optocoupler reverse isolation, amplify and anti-phase after, export respectively OUTPUT1, OUTPUT2, OUTPUT3, OUTPUT4, the relation of OUTPUT1～OUTPUT and PWM1, PWM2, DIR signal is as follows:
Wherein OUTPUT1 and OUTPUT2 are for driving the high-end input signal of chip U13, U14, OUTPUT3 and OUTPUT4 are low side input signal, through MOSFET drive circuit, process, Net1 is identical with signal and OUTPUT1 between Net5, for driving upper brachium pontis Q1, Net2 is identical with signal and OUTPUT2 between Net6, be used for driving brachium pontis Q2 on another, Net3 signal is identical with OUTPUT3, for driving lower brachium pontis Q3, Net4 signal is identical with OUTPUT4, for driving lower brachium pontis Q4.Q1 conducting when being high level between Net1 and Net5, all the other in like manner.During Q1 and Q4 conducting simultaneously, the sense of current be from 48V positive pole through Q1, electromagnet, potentiometer R21, Q4 to ground; During simultaneously conducting of Q2, Q3, the sense of current be from 48V positive source through Q2, potentiometer R21, electromagnet, Q3 to ground.During above two kinds of situations, the direction that flows through electromagnet is different, with this, controls the positive and negative motion of electromagnet.Wherein Q1, Q3 conducting simultaneously, same Q2, Q4 conducting simultaneously, as conducting can cause power supply short circuit, causes serious consequence, so PWM1 and PWM2 are complementary signal and have dead band, can effectively prevent Q1 and Q3 or Q2 and Q4 conducting simultaneously.And due to IR2110 boostrap circuit, the conducting that the conducting of upper bridge Q1 must following bridge Q3 is prerequisite, give bootstrap capacitor C23, C27 energising, so Q1 and Q3 need alternate conduction, same Q2 and Q4 also need alternate conduction.In electromagnet, electric current is oppositely or when stop; moment can produce very large induced current; inductive current direction and original current opposite in direction, can cause MOSFET to damage, thereby in the TVS at electromagnet two ends diode D5 and capacitor C 22, can absorb the large electric current protection MOSFET circuit of moment.The effect of potentiometer R21 is current limliting, prevents that the electric current causing due to electromagnet coil short circuit is excessive, meanwhile, by regulator potentiometer size, can regulate the size of current that flows through electromagnet, thus dynamics when regulating magnet moves.
In the utility model parameter regulating circuit, because the parameter that needs are controlled is more, if adopt the method for the general corresponding IO mouth of a button, will take a large amount of IO mouth of single-chip microcomputer, in order to reduce the use of IO, improve IO mouth utilance, the utility model parameter regulating circuit adopts the method for many buttons list IO, when different buttons is pressed in S1～S8, at the common port of button, can produce different magnitudes of voltage, different function corresponding to magnitude of voltage.Concrete function is as follows: S1 increases positive movement PWM duty ratio, S2 reduces positive movement PWM duty ratio, S3 increases counter motion PWM duty ratio, S4 reduces counter motion PWM duty ratio, S5 increases the positive movement time, S6 reduces the positive movement time, and S7 increases the counter motion time, and S8 reduces the counter motion time.In addition, the common port of button is also received a comparator and a reference voltage comparison, reference voltage is obtained 5V voltage dividing potential drop by potentiometer, and reference voltage is set to about 2.45V herein, and when not having, a button is pressed, the common port of button is high level (2.5V), the 1 pin output high level of comparator U2, when any one button is pressed, the common port voltage of button can be lower than 2.45V, comparator 1 pin output low level, allows Single Chip Microcomputer (SCM) system that the voltage of button common port is gathered and to be processed.The benefit that comparator is set is the burden that reduces AD hits and reduce Single Chip Microcomputer (SCM) system work.Single-pole double-throw switch (SPDT) S9 in parameter regulating circuit can allow electromagnet switch between single step, continuous two operating states, when work of electromagnet is during at continuous state, freely positive and negative motion of electromagnet, when work of electromagnet is during at single step state, S10 is starting switch, S10 clicks, and electromagnet carries out forward, counter motion once.
Claims (3)
1. an electromagnet drive circuit in bi-directional, is characterized in that, comprises main circuit and control circuit; Wherein:
1) main circuit: comprise filter circuit, H bridge operating circuit, protection and current-limiting circuit; 48V direct voltage successively with filter circuit, H bridge operating circuit, protection be connected with current-limiting circuit, finally connect electromagnet;
2) control circuit: comprise Single Chip Microcomputer (SCM) system, parameter regulating circuit, logical circuit, buffer circuit, MOSFET drive circuit; Single Chip Microcomputer (SCM) system is sent two-way pwm signal He Yi road direction signal Dir, by logical circuit, convert with the reverse isolation of buffer circuit and amplify, convert four tunnel control signals to, wherein two-way is controlled a MOSFET drive circuit, another two-way is controlled another MOSFET drive circuit, two-way MOSFET drive circuit is connected with H bridge operating circuit respectively, and parameter regulating circuit is connected with Single Chip Microcomputer (SCM) system.
2. a kind of electromagnet drive circuit in bi-directional according to claim 1, is characterized in that: for the filter circuit in described main circuit, two capacitor C in parallel 11, C12 carry out filtering to 48V operating voltage; The direct current of output is connected with H bridge operating circuit thus, wherein positive pole is connected with the drain electrode of two MOSFET Q1, Q2 of brachium pontis on H bridge, negative pole is connected with the source electrode of two MOSFET Q3, Q4 of lower brachium pontis, between the source electrode of each MOSFET and drain electrode, connects a fly-wheel diode; One end of H bridge operating circuit output and protection are connected with current limliting potentiometer R21 in current-limiting circuit, then connect capacitor C 22 and TVS diode D5 exporting between two ends.
3. a kind of electromagnet drive circuit in bi-directional according to claim 1, is characterized in that: the two-way pwm signal PWM1 that the Single Chip Microcomputer (SCM) system in described control circuit is sent, PWM2 He Yi road direction signal DIR, PWM1 is input to 3 pin, 10 pin of 2 pin, 5 pin and the AND OR NOT gate chip U5 of NAND gate chip U6 in logical circuit, PWM2 is input to 5 pin, 13 pin of AND OR NOT gate chip U5 in logical circuit, DIR is input to 1 pin of not gate chip U4,4 pin and 9 pin of 4 pin of NAND gate chip U6, AND OR NOT gate chip U5,1 pin of 2 pin of not gate chip U4 and NAND gate chip U6,1 pin of AND OR NOT gate chip U5 are connected with 2 pin, 6 pin of 6 pin of NAND gate chip, 3 pin and AND OR NOT gate chip, 8 pin difference output signal CTRL1, CTRL2, CTRL3, CTRL4 in logical circuit, CTRL1～CTRL4 carries out signals reverse isolation by optocoupler U7～U10 respectively and amplifies, then by optocoupler 6 pin output signal OUTPUT1～OUTPUT4 separately, OUTPUT1, OUTPUT3 is respectively by driving 10 pin of chip U13 with MOSFET after a filter capacitor filtering, 12 pin are connected, output signal Net3 and Net1 after 1 pin of U13 and 7 pin difference series resistance R22 and R23, resistance R 22, R23 is parallel diode D10 respectively, D11, the 5 pin output signal Net5 of U13, parallel resistance R26 and voltage stabilizing didoe D14 between Net1 and Net5, parallel resistance R27 and voltage stabilizing didoe D15 between Net3 and ground, the upper brachium pontis Q1 of the signal controlling H bridge between Net1 and Net5, the lower brachium pontis Q3 of the signal controlling H bridge between Net3 and ground, two paths of signals OUTPUT2 and OUTPUT4 are input to another identical MOSFET and drive chip U14 in addition, method of attachment is identical with U13, the upper brachium pontis Q2 of the signal controlling H bridge between Net2 and Net6, the lower brachium pontis Q4 of the signal controlling H bridge between Net4 and ground, in parameter regulating circuit, 9 resistance R 1～R9 series connection are carried out dividing potential drop to 2.5V voltage, between every two resistance, connect a button, totally 8 button S1～S8, the button other end is received together by one and is disappeared after trembling capacitor C 2 and be divided into two-way, be input to respectively 3 pin and 5 pin of voltage follower chip U3, 1 pin of U3 is connected with Single Chip Microcomputer (SCM) system AD input port after being connected with 2 pin, U36 pin is connected with 3 pin of comparator chip U2 after being connected with 7 pin, potentiometer R12 will be input to U310 pin after 5V voltage dividing potential drop, 8 pin of U3 are connected with 2 pin of comparator chip U2 after being connected with 9 pin, signal is connected with Single Chip Microcomputer (SCM) system INT input port from the 1 pin output of comparator chip U2, the two one end ground connection of putting switch S 9 of hilted broadsword, after other end connecting resistance R10, connect 3.6V power supply, rocking arm connects Single Chip Microcomputer (SCM) system P1.2 input port, button S10 two ends parallel connection disappears and trembles capacitor C 1, S10 one end ground connection, the other end connects Single Chip Microcomputer (SCM) system START input port.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320351547.7U CN203415345U (en) | 2013-06-19 | 2013-06-19 | Bidirectional electromagnet driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320351547.7U CN203415345U (en) | 2013-06-19 | 2013-06-19 | Bidirectional electromagnet driving circuit |
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| CN203415345U true CN203415345U (en) | 2014-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325522A (en) * | 2013-06-19 | 2013-09-25 | 浙江大学 | Electric magnet bi-directional driving circuit |
| CN106685104A (en) * | 2017-01-23 | 2017-05-17 | 中北大学 | Resonance type wireless power transmission device |
-
2013
- 2013-06-19 CN CN201320351547.7U patent/CN203415345U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325522A (en) * | 2013-06-19 | 2013-09-25 | 浙江大学 | Electric magnet bi-directional driving circuit |
| CN103325522B (en) * | 2013-06-19 | 2015-08-19 | 浙江大学 | Electromagnet drive circuit in bi-directional |
| CN106685104A (en) * | 2017-01-23 | 2017-05-17 | 中北大学 | Resonance type wireless power transmission device |
| CN106685104B (en) * | 2017-01-23 | 2019-01-22 | 中北大学 | Resonance type wireless power transfer |
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