Summary of the invention
For solve existing ultrasonic motor driver adopt transformer little as the output drive signal peak-to-peak value adjustable extent that driver part brings, need with problems such as supersonic motor impedance matching and volume are big, the invention provides a kind of ultrasonic motor drive module based on DC boosting, copped wave.
Ultrasonic motor drive module based on DC boosting, copped wave, it comprises DC voltage booster circuit, multichannel isolated drive circuit, multichannel bridge-type chopper circuit and digital signal input connector, the signal input part of every road isolated drive circuit is connected with the output of digital signal input connector respectively, the signal output part of every road isolated drive circuit is connected with the signal input part of per road and bridge formula chopper circuit, per road and bridge two power ends of formula chopper circuit be connected with power supply ground with the output of DC voltage booster circuit respectively.
Described DC voltage booster circuit is by switching power source control circuit, power driving circuit, filter circuit, booster circuit, bleeder circuit and pressure sampling circuit are formed, the control signal output ends of described switching power source control circuit is connected with the signal input part of power driving circuit, the signal output part of power driving circuit is connected with the signal input end of booster circuit, booster circuit output equal supersonic motor drive signal peak-to-peak value driving DC voltage Vout output respectively with the bridge-type chopper circuit, the power input of bleeder circuit and pressure sampling circuit is connected, half the output of driving reference voltage VCOM of the output driving DC voltage signal Vout of bleeder circuit is as the common port of supersonic motor drive signal, pressure sampling circuit is connected in parallel between the dc voltage output end and power supply ground of booster circuit after being connected by two resistance, the output of pressure sampling circuit is connected with the signal input part of filter circuit, and the signal output part of filter circuit is connected with the voltage feedback signal input of switching power source control circuit.
The advantage of the ultrasonic motor drive module based on DC boosting, copped wave of the present invention has: the peak-peak voltage adjustable extent of (), output drive signal is wide, and load capacity is strong, does not need to carry out impedance matching with supersonic motor, and adaptability is strong; (2), every road drive signal generation circuit all is independently, the way of drive signal that can be is according to actual needs carried out hardware and is mated flexibly, is easy to form tandem product, maintains easily and keeps in repair; (3), externally adopt digital interface, control flexible; (4), the circuit structure modularization, volume is little, cost is low, the convenient batch process in batches.Ultrasonic motor drive module based on DC boosting, copped wave of the present invention is applicable to the research institution of supersonic motors such as scientific research institutions, universities and colleges, also may be used on field and supersonic generator field that supersonic motor is used.
Embodiment:
Embodiment one: present embodiment is described referring to Fig. 1.The ultrasonic motor drive module based on DC boosting, copped wave of present embodiment, it is made up of DC voltage booster circuit 1, multichannel isolated drive circuit 3, multichannel bridge-type chopper circuit 4 and digital signal input connector 5, the signal input part of every road isolated drive circuit 3 is connected with the output of digital signal input connector 5 respectively, the signal output part of every road isolated drive circuit 3 with per road and bridge formula chopper circuit 4 signal input part be connected, per road and bridge formula chopper circuit two power ends of 4 be connected with power supply ground with the output of DC voltage booster circuit 1 respectively.
The driving DC voltage Vout that equals supersonic motor drive signal peak-to-peak value that present embodiment adopts Digital Signals that DC voltage booster circuit 1 is exported carries out copped wave, obtains the pulse signal that supersonic motor drives to be needed.The copped wave of present embodiment adopts digital signal interface to control, can be connected use with existing digital signal generation circuit, for example single-chip microcomputer digital signal generation circuit, DSP digital signal generation circuit, phase-locked loop digital signal generation circuit etc., easy to use, the research institution that is particularly useful for supersonic motors such as scientific research institutions, universities and colleges also may be used on field and supersonic generator field that supersonic motor is used.
The ultrasonic motor drive module based on DC boosting, copped wave of present embodiment, each group isolated drive circuit 3 and bridge-type chopper circuit 4 all are independently, can control separately, on the one hand can be according to actual conditions, the way of isolated drive circuit 3 and bridge-type chopper circuit 4 is set flexibly, highly versatile forms tandem product easily; Can also use the ultrasonic motor drive module based on DC boosting, copped wave of a cover present embodiment to drive two or many supersonic motors simultaneously on the other hand.
The drive signal that the ultrasonic motor drive module based on DC boosting, copped wave of present embodiment is exported is a square wave driving signal, through experiment confirm, supersonic motor adopts square wave driving signal bigger than no-load speed and the stalling torque that sine wave drive signal obtains.
Embodiment two: present embodiment is described referring to Fig. 2 to Fig. 4.Present embodiment and embodiment one are described based on DC boosting, the difference of the ultrasonic motor drive module of copped wave is, described DC voltage booster circuit 1 is by switching power source control circuit 11, power driving circuit 12, filter circuit 16, booster circuit 13, bleeder circuit 14 and pressure sampling circuit 15 are formed, the control signal output ends of described switching power source control circuit 11 is connected with the signal input part of power driving circuit 12, the signal output part of power driving circuit 12 is connected with the signal input end of booster circuit 13, booster circuit 13 output equal supersonic motor drive signal peak-to-peak value driving DC voltage Vout output respectively with bridge-type chopper circuit 4, bleeder circuit 14 is connected with the power input of pressure sampling circuit 15, half the output of driving reference voltage VCOM of the output driving DC voltage signal Vout of bleeder circuit 14 is as the common port of supersonic motor drive signal, pressure sampling circuit 15 is connected in parallel between the dc voltage output end and power supply ground of booster circuit 13 after being connected by two resistance, the output of pressure sampling circuit 15 is connected with the signal input part of filter circuit 16, and the signal output part of filter circuit 16 is connected with the voltage feedback signal input of switching power source control circuit 11.
The switching power source control circuit 11 of present embodiment adopts Switching Power Supply special integrated circuit MC34063 cake core as the master control chip.
The power driving circuit 12 of present embodiment adopts triode promotion bridge circuit that the signal of switch source output is carried out power amplification.
The filter circuit 16 of present embodiment adopts the voltage follower of being made up of operational amplifier as filter circuit.
Referring to Fig. 3, described bleeder circuit 14 is made of pipe P type and the field effect of N type, the last brachium pontis of described bleeder circuit is the field effect transistor Q24 of N raceway groove, following brachium pontis is the field effect transistor Q29 of P raceway groove, the grid of two field effect transistor is connected by voltage-stabiliser tube D19, the negative electrode of voltage-stabiliser tube D19 is connected with the grid of the field effect transistor Q24 of last brachium pontis, the anode of voltage-stabiliser tube D19 is connected with the grid of the field effect transistor Q29 of following brachium pontis, the grid polyphone potentiometer R30 of the field effect transistor Q24 of the N raceway groove of last brachium pontis is connected with the 33 resistance R 33 outputs back and with booster circuit 13, the grid of the field effect transistor Q29 of the P raceway groove of following brachium pontis is connected with power supply ground by the 31 resistance R 31, the drain electrode of the field effect transistor Q24 of the N raceway groove of last brachium pontis be connected with the source electrode of the field effect transistor Q29 of the P raceway groove of following brachium pontis export equal driving DC voltage signal Vout that booster circuit 13 exports half reference voltage VCOM as the common port of supersonic motor drive signal.
Pressure sampling circuit 15 in the present embodiment is connected between back parallel connection direct drive voltage signal Vout and the power supply earth signal by two resistance, and the voltage signal VF after the ratio of driving DC voltage signal Vout is dwindled offers filter circuit 16 as sampled signal.
Referring to Fig. 3, described booster circuit 13 is by first class boost circuit 131, secondary booster circuit 132 is formed, the signal output part of power driving circuit 12 is connected with the signal input end of first class boost circuit 131 with secondary booster circuit 132 simultaneously, the voltage signal input of first class boost circuit 131 is connected with the output of the low-voltage dc power supply in the external world, the voltage signal output end Vol of first class boost circuit 131 is connected with the voltage signal input of secondary booster circuit 132, secondary booster circuit 132 output equal supersonic motor drive signal peak-to-peak value driving DC voltage Vout output respectively with bridge-type chopper circuit 4, bleeder circuit 14 is connected with the power input of pressure sampling circuit 15.
First class boost circuit 131 and secondary booster circuit 132 in the present embodiment all are made up of field effect transistor and boost inductance, described boost inductance adopts the parallel coiling of many enamelled wires, to reduce the copper loss that eddy current causes, magnetic core adopts canned magnetic core, the electromagnetic wave that inductance is outwards penetrated reduces significantly, perhaps also adopt the amorphous state magnet ring to make permeability magnetic material, can reduce the volume of inductance like this.
Present embodiment has adopted the boosting mode of controlling the two-stage booster circuit simultaneously by a slice Switching Power Supply control integrated circuit to obtain high-voltage signal, the scope of boosting is big, when the input voltage signal Vin of first class boost circuit 131 is between 10V~30V, the driving DC voltage signal Vout of secondary booster circuit 132 output can be adjusted between 90V~320V, and this scheme has that circuit structure is simple, the wide ranges of boosting, volume are little, element utilance height, driving power is big, load capacity is strong, advantage such as with low cost.
Referring to Fig. 4, described isolated drive circuit 3 adopts the field effect transistor special driving chip, bridge-type chopper circuit 4 is the electric bridges that are made of two N type field effect transistor, the input signal end of isolated drive circuit 3 with enable control end and be connected with an output of digital signal input connector 5 respectively, whether the described control end control isolated drive circuit 3 that enables is in running order, described signal input part input supersonic motor drives the digital pulse signal that needs, isolated drive circuit 3 drives bridge-type chopper circuit 4 output high frequencies, the drive signal of high pressure, the advantage of this technical scheme is that circuit structure is simple, reliable, the efficient height.
The described field effect transistor special driving chip of present embodiment is selected IR2104 type integrated circuit for use.
Every road isolated drive circuit 3 has two signal input parts in the present embodiment, when using, in the time of n road isolated drive circuit 3 and bridge-type chopper circuit 4, need 2n digital signal of outside input, per two digital signals are one group, be connected with pulse signal input terminal with the control input end that enables of one road isolated drive circuit 3 respectively, the startup of each road isolated drive circuit 3 and stop and to control separately, according to actual needs, isolated drive circuit 3 and bridge-type chopper circuit 4 are carried out flexible allocation, control, can with needs two-way drive signal, multiple supersonic motors such as four tunnel drive signals are used, n road isolated drive circuit can also be divided into the m group, control m supersonic motor.
Referring to Fig. 5, be that present embodiment is described based on DC boosting, an application example of the ultrasonic motor drive module of copped wave, it can drive the supersonic motor of two groups of drive signals of two needs, it comprises two groups of isolated drive circuits 3 and two groups of bridge-type chopper circuits 4, the control end that enables of two groups of isolated drive circuits 3 is connected in parallel and is connected with external digital signal by digital signal connector 5, the signal input part of two groups of isolated drive circuits 3 is connected with two digital pulse signals in the external world respectively, then two of two groups of bridge-type chopper circuits 4 signal output part V1, the driving reference voltage signal VCOM output of V2 and direct current boosting power 1 is connected with driven supersonic motor.When needs start supersonic motor, to be changed to high level with the digital signal that control end is connected that enables of isolated drive circuit 3, isolated drive circuit 3 is started working, digital pulse signal according to input drives the 4 beginning copped waves of bridge-type chopper circuit, when being changed to low level the time with the digital signal that control end is connected of enabling of isolated drive circuit 3, isolated drive circuit 3 quits work, and supersonic motor quits work.
Embodiment three: present embodiment is described referring to Fig. 6, Fig. 7.Present embodiment is on the basis of embodiment one or two described ultrasonic motor drive modules based on DC boosting, copped wave; increased protective circuit 8; described protective circuit 8 is the output high potential signal when starting protection, and the voltage signal feedback input end CMPR of the switching power source control circuit 11 in the signal output part of protective circuit 8 and the DC voltage booster circuit 1 is connected.
Protective circuit 8 in the present embodiment is under-voltage protecting circuits, and the input signal of described protective circuit 8 is the working power of circuit, when the input signal of protective circuit 8 is lower than set point, and the output high potential signal.
Referring to Fig. 7; the protective circuit 8 of present embodiment is a under-voltage road protective circuit; the comparison circuit that it is made up of amplifier U2A; what the positive input of described comparison circuit was imported is high potential signal; adopt resistance R 3 and R1 that amplifier power supply V12 is carried out dividing potential drop in the present embodiment and obtain the positive input that described high potential signal is input to amplifier U2A; the reverse input end of comparison circuit is connected with the anode of voltage-stabiliser tube D5 and an end of resistance R 2 respectively; the negative electrode of voltage-stabiliser tube D5 is connected with amplifier working power V12; the other end of resistance R 2 is connected with power supply ground, and the output of amplifier U2A is connected with the Voltage Feedback input of switching power source control circuit 11 by R4.
Because when the Voltage Feedback input CMPR of the switching power source control circuit 11 in the present embodiment presents high potential; its output will be turned off; so when present embodiment described based on the amplifier working power V12 in the ultrasonic motor drive module of DC boosting, copped wave low excessively the time; illustrate that circuit has fault; protective circuit 8 will be exported the pressure feedback port that high potential signal is given switching power source control circuit 11 this moment; switching power source control circuit 11 is quit work, return to normal voltage up to amplifier working power V 12 and just resume work.
Embodiment four: present embodiment is described referring to Fig. 8.The difference of the described ultrasonic motor drive module based on DC boosting, copped wave of present embodiment and embodiment three is; described protective circuit 8 is output short circuit protection circuits; the input signal of described protective circuit 8 is output voltage sampled signal VF of booster circuit 3; when protective circuit 8 when input signal is zero potential; the output short-circuit based on the ultrasonic motor drive module of DC boosting, copped wave of present embodiment is described, then protective circuit 8 output high potential signals.
The protective circuit 8 of present embodiment is made up of amplifier U1A and three resistance; resistance R 5 and R6 series connection are between amplifier power supply V12 and power supply ground; the link of resistance R 5 and R6 is connected with the positive input of amplifier U1A; the reverse input end of amplifier U1A is connected with the output of pressure sampling circuit 15, and the output of amplifier U1A is connected with the voltage feedback signal input of switching power source control circuit by resistance R 7.The protective circuit 8 of present embodiment; in the time of the output short circuit of booster circuit 3; the output voltage sampled signal VF of booster circuit 3 is a zero potential; the reverse input signal that is protective circuit 8 is a zero potential; then its output signal is the signal of forward input; be high potential, switching power source control circuit 11 quits work.
Embodiment five: present embodiment is described referring to Fig. 9.The difference of the described ultrasonic motor drive module based on DC boosting, copped wave of present embodiment and embodiment three is; described protective circuit 8 is overheating protection circuits; described protective circuit 8 is hysteresis comparison circuits; the signal input part of described protective circuit 8 connects a thermistor; be used in the measuring circuit the easily temperature of heater members; when temperature is too high, protective circuit 8 output high potential signals.
The protective circuit 8 of present embodiment is by amplifier U3A; thermocouple R14 and some resistance are formed; one end of resistance R 9 is connected with amplifier power supply V12; the other end of resistance R 9 is connected with the negative input of amplifier U3A and the end of thermocouple R14 respectively; the other end of thermocouple R14 is connected with power supply ground; resistance R 8 and R10 are connected between amplifier power supply V12 and the power supply ground; the link of resistance R 8 and R10 is connected by the positive input of resistance R 11 with amplifier U3A; resistance R 12 is connected between the positive input and output of amplifier U3A, and the output of amplifier U3A is connected with the voltage feedback signal input of switching power source control circuit 11 by resistance R 13.When easily the temperature of heater members is too high in the circuit; the impedance of thermocouple R14 in the protective circuit 8 descends; the current potential of the reverse input end of amplifier U3A is descended; making amplifier output is high potential by the electronegative potential upset; reaching the purpose of shutdown switch power control circuit 11 work, is the hysteresis comparison circuit owing to what adopt, so after the temperature of easy heater members drops to uniform temperature; the output of amplifier U3A just can be turned into electronegative potential once more, and this moment, circuit could operate as normal.
Embodiment six: present embodiment is described referring to Figure 10.The difference of the described ultrasonic motor drive module based on DC boosting, copped wave of present embodiment and embodiment one to four is; it comprises a plurality of protective circuits 8 and a plurality of diode; described protective circuit 8 is the output high potential signal when starting protection; the signal output part of each protective circuit 8 is connected with the anode of a diode, is connected with the voltage signal feedback input end CMPR of switching power source control circuit 11 after the negative electrode parallel connection of a plurality of diodes.
Present embodiment based on DC boosting; the ultrasonic motor drive module of copped wave; the output of a plurality of protective circuits 8 is connected to the voltage feedback signal input CMPR of switching power source control circuit 11 by diode; like this; switching power source control circuit 11; the output signal of a plurality of protective circuits 8 be " or " relation; as long as the output signal of any one protective circuit 8 is a high level; capital trigger switch power control circuit 11 quits work; and then realized based on DC boosting; the multiple protective of the ultrasonic motor drive module of copped wave makes its reliability higher.
Embodiment seven: present embodiment is described referring to Figure 11.The difference of the described ultrasonic motor drive module based on DC boosting, copped wave of present embodiment and embodiment one to six is, it also comprises output voltage sampling circuit 9, described output voltage sampling circuit 9 is made up of the second potentiometer R29 and voltage follower U15B, two stiff ends of the described second potentiometer R29 respectively with DC voltage booster circuit 1 in the output of filter circuit 16 be connected with power supply ground, the adjustable end of the second potentiometer R29 and the input of voltage follower U15B are connected.
The output voltage sampling circuit 9 of present embodiment adopts the second potentiometer R29 that the output voltage sampled signal VCMP in the filter circuit 16 is carried out the dividing potential drop sampling, obtain the voltage signal VOL between the 1V to 5V, in practical application, can read this voltage signal by external equipment and calculate the information of voltage that obtains present embodiment based on the peak-to-peak value of the actual output drive signal of ultrasonic motor drive module of DC boosting, copped wave.