CN201041991Y

CN201041991Y - Transformerless Ultrasonic Motor Driver

Info

Publication number: CN201041991Y
Application number: CNU2007201162704U
Authority: CN
Inventors: 曲建俊; 王志峰; 邓静; 郝峰; 董琳
Original assignee: Harbin Institute of Technology Shenzhen
Current assignee: Harbin Institute of Technology Shenzhen
Priority date: 2007-05-25
Filing date: 2007-05-25
Publication date: 2008-03-26
Anticipated expiration: 2017-05-25

Abstract

Transformerless Ultrasonic Motor Drivers involves drivers for ultrasonic motors. The utility model solves the problems of large volume, poor adaptability and high cost caused by the need for transformer driving in the existing ultrasonic motor driver. The utility model comprises a single-chip pulse signal generating circuit, a DC boost circuit, a multi-channel isolation drive circuit and a multi-channel bridge chopper circuit. The signal output terminal of each isolated drive circuit is connected to the control signal input terminal of each bridge chopper circuit, and the two power supply terminals of each bridge chopper circuit are connected in parallel to the DC drive voltage output terminal of the DC boost circuit and between power and ground. The utility model provides an ultrasonic motor driver with adjustable multi-parameters, which can be applied to scientific research institutes of ultrasonic motors and the application field of ultrasonic motors, and can also be applied to the field of ultrasonic generators.

Description

Transformerless ultrasonic motor driver

Technical field

The utility model relates to the driver of ultrasound electric machine.

Background technology

Supersonic motor is the drive unit of a kind of novel concept of occurring of recent two decades, compare with traditional electromagnetic machine, have that inertia is little, not affected by magnetic fields, quiet, the low-speed big of running, can directly drive load, cut off self-lock, characteristics such as forms of motion is versatile and flexible.Supersonic motor needs the high-frequency high-voltage signal of 90 ° of two-way phase phasic differences at least to drive.At present, ultrasonic motor driver roughly divides two big classes: a class is to utilize switch inversion technology (referring to accompanying drawing 12), the employing transformer boosts, this measure is used commonplace at home, but volume heaviness, and the different model motor need mate the power supply (number be as Chinese patent application 02138534.3 open source literature) of different model, and versatility is bad; Another kind of is to adopt Direct Digital composite signal waveform (referring to accompanying drawing 13), though this measure has realized the adjusting of frequency modulation, phase modulation and amplitude modulation, the pumping signal ideal, but expensive DSP and DDS chip have been adopted in the generation of signal, not only waste one's talent on a petty job, the circuit structure complexity, and cost an arm and a leg (number be 03112679.0 open source literature) as Chinese patent application.Domestic existing driver does not mostly possess the function that regulating frequency simultaneously, control phase are poor, regulate the output voltage peak-to-peak value and regulate output drive waveforms duty ratio, and this is very restricted the application of driving power.And existing driver all adopts transformer to boost, and volume is bigger, is unfavorable for the miniaturization of equipment.Along with the microelectronic fast development of machinery is more and more to the demand of micromachine, often need be less than 1cm ³Micro motor because the size of supersonic motor is unrestricted, more promising in the micro-machine field.This makes development small size supersonic motor driving power become a kind of inevitable.

The utility model content

For solve ultrasonic motor driver need transformer to drive and brought that volume is big, bad adaptability and the high problem of cost, the utility model provides a kind of transformerless ultrasonic motor driver that volume is little, adaptability is strong, cost is low that more is applicable to the miniature ultrasonic motor.

Transformerless ultrasonic motor driver, it comprises the single-chip microcomputer pulse signal generation circuit, DC voltage booster circuit, multichannel isolated drive circuit and multichannel bridge-type chopper circuit, described single-chip microcomputer pulse signal generation circuit contain same frequency, the multiplex pulse signal output part of duty ratio and phase difference is connected with the signal input part of multichannel isolated drive circuit respectively, the signal output part of every road isolated drive circuit is connected with the signal input end of per road and bridge formula chopper circuit, per road and bridge, two power ends of formula chopper circuit were connected in parallel between the driving DC voltage output end vo ut and power supply ground of DC voltage booster circuit, per road and bridge formula chopper circuit output ultrasonic wave motor road pulse drive signal.

The advantage of transformerless ultrasonic motor driver of the present utility model has: (one), adopt DC voltage booster circuit that the peak-to-peak value voltage of the drive signal that supersonic motor needs is provided, and adjustable range is wide, output voltage stabilization, load capacity are strong; (2), adopting scm software to control exports the digital pulse signal that copped wave is used, can adjust the parameters such as frequency, duty ratio and phase difference of output drive signal flexibly; (3), every road drive signal generation circuit all is independently, the way of drive signal that not only can be is according to actual needs carried out hardware and is mated flexibly, is easy to form tandem product, also maintains easily and keeps in repair; (4), circuit structure modularization, conveniently batch process; (4), volume is little, cost is low.Can be applied to the scientific research institutions and the supersonic motor application of supersonic motor, also can be applicable to the supersonic generator field.

Description of drawings

Fig. 1 is an integrated circuit structural representation of the present utility model, Fig. 2, Fig. 3 is the electrical block diagram of embodiment two described DC voltage booster circuit 1, Fig. 4 is the electrical block diagram of isolated drive circuit 3 described in the embodiment three and bridge-type chopper circuit 4, Fig. 5 is embodiment four described integrated circuit structural representations, Fig. 6 is the integrated circuit structural representation described in the embodiment five, Fig. 7 is the electrical block diagram of the crystal oscillating circuit able to programme 8 described in the embodiment five, Fig. 8 is the integrated circuit structural representation described in the embodiment seven, Fig. 9 is embodiment seven described integrated circuit structural representations, Figure 10 is the electrical block diagram of embodiment seven described voltage sampling circuits 9, Figure 11, Figure 12 is the electrical block diagram of existing two kinds of ultrasonic motor drivers.

Embodiment

Embodiment one: present embodiment is described referring to Fig. 1.The transformerless ultrasonic motor driver of present embodiment is by single-chip microcomputer pulse signal generation circuit 2, DC voltage booster circuit 1, multichannel isolated drive circuit 3 and multichannel bridge-type chopper circuit 4 are formed, described single-chip microcomputer pulse signal generation circuit 2 contain same frequency, the multiplex pulse signal output part of duty ratio and phase difference is connected with the signal input part of multichannel isolated drive circuit 3 respectively, the signal output part of every road isolated drive circuit 3 with per road and bridge formula chopper circuit 4 signal input end be connected, per road and bridge, formula chopper circuit two power ends of 4 were connected in parallel between the driving DC voltage output end vo ut and power supply ground of DC voltage booster circuit 1, per road and bridge formula chopper circuit 4 output ultrasonic wave motors road pulse drive signal.

Present embodiment adopts DC voltage booster circuit 1, the low-voltage dc voltage signal of outside directly is promoted to the driving DC voltage signal Vout of the peak-to-peak value of supersonic motor drive signal, adopts Digital Signals that this driving DC voltage signal Vout is carried out copped wave then and obtain the pulse drive signal that supersonic motor needs.The adjustable extent of DC voltage booster circuit booster tension is wide, and load capacity is strong, need not to carry out impedance matching with supersonic motor, makes the adaptability of transformerless ultrasonic motor driver of present embodiment stronger.

Present embodiment adopts the Single-chip Controlling pulse signal to take place, Single-chip Controlling is flexible, can produce channelized frequencies, duty ratio, control signal that phase difference is adjustable, make present embodiment output drive signal waveform frequency, duty ratio and phase difference control flexibly.

Embodiment two: present embodiment is described referring to Fig. 2, Fig. 3.The difference of present embodiment and embodiment one described transformerless ultrasonic motor driver 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, the dc voltage output end output of booster circuit 13 equals the power input of the driving DC voltage Vout of supersonic motor drive signal peak-to-peak value to bridge-type chopper circuit 4, two power ends of bleeder circuit 14 are connected with power supply ground with the dc voltage output end Vout of booster circuit 13 respectively, half driving reference voltage VCOM of the output of bleeder circuit 14 output driving DC voltage Vout, 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 bleeder circuit 14 of present embodiment 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, voltage-stabiliser tube D19 is used to solve the intermodulation distortion that is caused by the field effect transistor cut-in voltage, the current potential VCOM of output can regulate by potentiometer R30, and then the output output that guarantees bleeder circuit 14 equals half of driving DC voltage signal Vout of booster circuit 13 outputs, and described driving reference voltage VCOM is 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.

The filter circuit 16 of present embodiment adopts the voltage follower of being made up of operational amplifier as filter circuit.

Booster circuit 13 in the present embodiment is made up of first class boost circuit 131, secondary booster circuit 132, 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 Vo1 of first class boost circuit 131 is connected with the voltage signal input of secondary booster circuit 132, the output output driving DC voltage Vout of secondary booster circuit 132.

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 inductance like this.

The booster circuit 13 of the present embodiment 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.

Embodiment three: present embodiment is described referring to Fig. 4.Isolated drive circuit 3 in the present embodiment adopts the special-purpose isolation drive chip I of field effect transistor R2104, bridge-type chopper circuit 4 is the electric bridges that are made of two N type field effect transistor, two power ends of bridge-type chopper circuit 4 are connected with power supply ground with the dc voltage output end of DC voltage booster circuit 1 respectively, the signal input part of isolated drive circuit 3 is connected with the pulse signal output end that contains same frequency, duty ratio and phase difference of single-chip microcomputer pulse signal generation circuit 2, and the signal output part of isolated drive circuit 3 is connected with the signal input end of bridge-type chopper circuit 4.

The described field effect transistor special driving chip of present embodiment is selected IR2104 type integrated circuit for use.

Embodiment four: present embodiment is described referring to Fig. 5.The difference of present embodiment and embodiment one to three described transformerless ultrasonic motor driver is, it also comprises keyboard 7 and display 6, the output of described keyboard 7 is connected with the data input pin of single-chip microcomputer pulse signal generation circuit 2, and the data input pin of display 6 is connected with the data output end of single-chip microcomputer pulse signal generation circuit 2.

Present embodiment has increased the human interface devices of keyboard and display, can revise, set the parameters such as frequency, duty ratio and phase difference of the pulse signal that will export by keyboard and display, make the transformerless ultrasonic motor driver of present embodiment can export the drive signal of multiple parameter as requested, adaptability is stronger.

Embodiment five: present embodiment is described referring to Fig. 6.The difference of present embodiment and embodiment one to four described transformerless ultrasonic motor driver is, it also comprises crystal oscillating circuit 8 able to programme, described crystal oscillating circuit able to programme 8 is the adjustable crystal oscillating circuits of output frequency, and the frequency signal output of crystal oscillating circuit 8 able to programme is connected with the frequency signal input end of single-chip microcomputer pulse signal generation circuit 2.

Referring to Fig. 7, the crystal oscillating circuit able to programme 8 of present embodiment is made up of crystal oscillator L2 able to programme and potentiometer R20, wherein said crystal oscillator L2 able to programme selects the LTC1799 cake core for use, can change crystal oscillating circuit 8 output signal frequency able to programme by the change in resistance of adjusting potentiometer R20, promptly change the operating frequency of single-chip microcomputer pulse signal generation circuit 2, and then changed the frequency of single-chip microcomputer pulse signal generation circuit 2 output pulse signals.Present embodiment can adjust single-chip microcomputer pulse signal generation circuit 2 output signal frequency arbitrarily by adjusting the resistance of potentiometer R20 between 20～100kHz.

Embodiment six: present embodiment is described referring to Fig. 8.The difference of present embodiment and embodiment five described transformerless ultrasonic motor drivers is, it also comprises master cpu circuit 5, keyboard 7 and display 6, master cpu circuit 5 is connected by the SPI serial communication interface with single-chip microcomputer pulse signal generation circuit 2, the output of keyboard 7 is connected with the data input pin of master cpu circuit 5, and the data input pin of display 6 is connected with the data output end of master cpu circuit 5.

The master cpu circuit 5 of present embodiment and single-chip microcomputer pulse signal generation circuit 2 are selected the PIC16C64 type and the PIC16C62 type single chip circuit of PIC series respectively.

Present embodiment has increased a master cpu circuit 5, promptly use double mcu control, master cpu circuit 5 is responsible for setting parameter with display drive signals by keyboard and display, then the parameter of setting is passed to single-chip microcomputer pulse signal generation circuit 2 by the SPI serial communication interface, and single-chip microcomputer pulse signal generation circuit 2 is only done pulse signal generation work according to the order of master cpu circuit 5, and reliability is higher.

Present embodiment adopts master cpu circuit 5 and the single-chip microcomputer pulse signal generation circuit 2 that has the SPI serial communication interface, described SPI serial communication interface is the communication interface that has clock, be not subjected to the influence of single-chip microcomputer operating frequency, avoided influencing communication owing to single-chip microcomputer pulse signal generation circuit 2 uses outside adjustable crystal oscillator.

Embodiment seven: present embodiment is described referring to Fig. 9 and Figure 10.The difference of present embodiment and embodiment six described transformerless ultrasonic motor drivers is, it also comprises voltage sampling circuit 9, the signal output part of the filter circuit 16 in the signal input part of described voltage sampling circuit 9 and the DC voltage booster circuit 1 is connected, and the signal output part of voltage sampling circuit 9 is connected with the A/D converting analogue amount input of master cpu circuit 5.

The driving DC voltage Vout of DC voltage booster circuit 1 output can be gathered and show to the transformerless ultrasonic motor driver of present embodiment, can implement the peak-to-peak value voltage of monitoring driving signal in the running of supersonic motor.

Claims

1. The ultrasonic motor driver without transformer is characterized in that it includes a single-chip pulse signal generating circuit (2), a DC boost circuit (1), a multi-channel isolation drive circuit (3) and a multi-channel bridge chopper circuit (4), The multi-channel pulse signal output end that contains same frequency, duty cycle and phase difference of described single-chip pulse signal generating circuit (2) is connected with the signal input end of multi-channel isolation driving circuit (3) respectively, and every road isolation driving circuit ( The signal output terminal of 3) is connected to the control signal input terminal of each bridge chopper circuit (4), and the two power supply terminals of each bridge chopper circuit (4) are connected in parallel to the DC drive voltage of the DC boost circuit (1). Between the output terminal Vout and the power ground.

2. The ultrasonic motor driver without transformer according to claim 1, characterized in that the DC boost circuit (1) is composed of a switching power supply control circuit (11), a power drive circuit (12), a filter circuit (16), A boost circuit (13), a voltage divider circuit (14) and a voltage divider sampling circuit (15) are formed, the control signal output end of the switching power supply control circuit (11) is connected with the signal input end of the power drive circuit (12), The signal output end of the power drive circuit (12) is connected with the control signal input end of the booster circuit (13), and the output end of the booster circuit (13) output is equal to the DC drive voltage Vout of the peak-to-peak value of the ultrasonic motor drive signal and is connected to the bridge respectively. Type chopper circuit (4), voltage divider circuit (14) and the power input end of voltage divider sampling circuit (15) are connected, and two power supply ends of voltage divider circuit (14) are connected with the DC voltage of step-up circuit (13) respectively. The output terminal Vout is connected to the power supply ground, and the voltage division sampling circuit (15) is connected between the DC voltage output terminal of the booster circuit (13) and the power supply ground after two resistors are connected in series, and the output terminal of the voltage division sampling circuit (15) It is connected with the signal input end of the filter circuit (16), and the signal output end of the filter circuit (16) is connected with the voltage feedback signal input end of the switching power supply control circuit (11).

3. The ultrasonic motor driver without transformer according to claim 1, characterized in that the isolated drive circuit (3) adopts a dedicated isolated drive chip for field effect tubes, and the bridge chopper circuit (4) is composed of two N-type The bridge formed by field effect tubes, the two power supply terminals of the bridge chopper circuit (4) are respectively connected to the DC voltage output terminal of the DC boost circuit and the power supply ground, and the signal input terminal of the isolation drive circuit (3) is connected to the single chip microcomputer pulse The signal generating circuit (2) is connected to the output end of the pulse signal having the same frequency, duty ratio and phase difference, and the signal output end of the isolated driving circuit (3) is connected to the control signal input end of the bridge chopper circuit (4).

4. The ultrasonic motor driver without transformer according to claim 1, is characterized in that it also includes keyboard (7) and display (6), the output terminal of described keyboard (7) and single-chip pulse signal generating circuit (2) The data input end of the display (6) is connected with the data output end of the single-chip pulse signal generating circuit (2).

5. The ultrasonic motor driver without transformer according to claim 1 is characterized in that it also includes a programmable crystal oscillator circuit (8), and the programmable crystal oscillator circuit (8) is a crystal oscillator circuit with adjustable output frequency, programmable The frequency signal output end of the crystal oscillator circuit (8) is connected with the frequency signal input end of the single-chip microcomputer pulse signal generating circuit (2).

6. The transformerless ultrasonic motor driver according to claim 1 or 2 or 3 or 5, characterized in that it also includes a main control CPU circuit (5), a keyboard (7) and a display (6), and the main control The CPU circuit (5) and the single-chip pulse signal generating circuit (2) are connected through the SPI serial communication interface, the output end of the keyboard (7) is connected with the data input end of the main control CPU circuit (5), and the data input of the display (6) End is connected with the data output end of main control CPU circuit (5).

7. The ultrasonic motor driver without transformer according to claim 6, characterized in that it also includes a voltage sampling circuit (9), the signal input terminal of the voltage sampling circuit (9) and the signal output of the filter circuit (16) The terminal is connected, and the signal output terminal of the voltage sampling circuit (9) is connected with the A/D conversion analog quantity input terminal of the main control CPU circuit (5).