CN206509213U - Full-bridge drive device, ultrasonic transducer and ultrasonic system - Google Patents
Full-bridge drive device, ultrasonic transducer and ultrasonic system Download PDFInfo
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- CN206509213U CN206509213U CN201720186396.2U CN201720186396U CN206509213U CN 206509213 U CN206509213 U CN 206509213U CN 201720186396 U CN201720186396 U CN 201720186396U CN 206509213 U CN206509213 U CN 206509213U
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Abstract
The utility model provides a kind of full-bridge drive device, ultrasonic transducer and ultrasonic system, and full-bridge drive device includes structure identical the first half-bridge driven module and the second half-bridge driven module；First half-bridge driven module includes：First drive pulse signal of outside input is converted into the first flash drive signal and the first low side drive signal by the first half bridge drive unit；First flash drive signal is zoomed into the first high side switches pipe drive signal and drives the first high side switches pipe by the first power drive unit, and the first low side drive signal is zoomed into the first lower edge switch pipe drive signal the first lower edge switch pipe of driving；First return difference protection location, controls the return difference of the first half bridge drive unit.Full-bridge drive device or method of the present utility model can be applied to ultrasonic transducer, realize that the full-bridge of ultrasonic transducer drives, and the guard time during driving can flexibly be set, while also having the power defencive function with return difference.
Description
Technical field
The utility model belongs to electronic circuit technology field, is related to a kind of drive circuit, and more particularly to a kind of full-bridge drives
Dynamic device, ultrasonic transducer and ultrasonic system.
Background technology
Ultrasonic transducer is a kind of not only electric energy can be converted into acoustic energy but also acoustic energy can be converted into the device of electric energy.
Its operation principle is the positive inverse piezoelectric effect according to piezoelectric, produces ultrasonic wave using inverse piezoelectric effect, i.e., in piezoelectric
The upper alternating sinusoidal signal plus certain specific frequency, the mechanical deformation that material will change with added signal frequency, then exists
The mechanical wave of density interphase is produced in surrounding medium, if its vibration frequency is in ultrasonic range, this mechanical wave is exactly ultrasonic wave.
During reception, the acoustical signal from detection thing is become electric signal output using direct piezoelectric effect.For example, ultrasonic surgical systems are utilized
The inverse piezoelectric effect of ultrasonic transducer, ultrasonic test system then make use of the positive inverse piezoelectric effect of ultrasonic transducer.
Ultrasonic transducer is the critical component of generation ultrasonic vibration in ultrasonic surgical systems, is also production in ultrasonic test system
The part of ultrasound is given birth to and receives, the performance of its drive circuit has heavy to closing to whole ultrasonic surgical systems or ultrasonic test system
The effect wanted.And Push-Pull power type of drive is used the driving method of existing ultrasonic transducer more.Push-pull drive is two different
Polar transistor output circuit OTL.It is two parameter identical power BJT pipes or MOSFET pipes, with push pull mode
It is present in circuit, the waveform amplification task of each responsible positive-negative half-cycle, when circuit works, two symmetrical power switch pipes are each
Only one of which is turned on, so the small efficiency high of conduction loss.Recommending output mode can also can both be extracted to load sink current from load
Electric current.Have the disadvantage：Transformer carries centre cap, and switching tube to bear voltage higher；Due to transformer primary side leakage inductance
In the presence of, the moment of power switch pipe shut-off, hourglass source electrode can produce larger due to voltage spikes, and the ripple of input current is larger in addition,
Thus the volume of input filter is larger.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model be to provide a kind of full-bridge drive device,
Ultrasonic transducer and ultrasonic system, the push-pull driver circuit for solving existing ultrasonic transducer lack asking for defencive function
Topic.
In order to achieve the above objects and other related objects, the utility model provides a kind of full-bridge drive device, the full-bridge
Drive device includes the first half-bridge driven module and the second half-bridge driven module；The first of the first half-bridge driven module output
Drive signal and the second drive signal of the second half-bridge driven module output drive a ultrasonic transducer；First half-bridge
Drive module includes：First half bridge drive unit, the driving of the first flash is converted into by the first drive pulse signal of outside input
Signal and the first low side drive signal；First power drive unit, is connected with first half bridge drive unit, by described first
Flash drive signal zooms into the first high side switches pipe drive signal and drives the first high side switches pipe, and the described first low side is driven
Dynamic signal zooms into the first lower edge switch pipe drive signal and drives the first lower edge switch pipe；First return difference protection location, gathers institute
The first operating current signal of the first high side switches pipe or the first lower edge switch pipe is stated, the first operating current signal is changed
Into the first return difference protection signal, and by the first return difference protection signal transmission to first half bridge drive unit, institute is controlled
State the return difference of the first half bridge drive unit；The first operating current signal is first drive signal；Described the second half
Bridge drive module includes：Second half bridge drive unit, is converted into the second flash by the second drive pulse signal of outside input and drives
Dynamic signal and the second low side drive signal；Second power drive unit, is connected with second half bridge drive unit, by described
Two flash drive signals zoom into the second high side switches pipe drive signal and drive the second high side switches pipe, and by the described second low side
Drive signal zooms into the second lower edge switch pipe drive signal and drives the second lower edge switch pipe；Second return difference protection location, collection
Second operating current signal of the second high side switches pipe or the second lower edge switch pipe, the second operating current signal is turned
Change the second return difference protection signal into, and by the second return difference protection signal transmission to second half bridge drive unit, control
The return difference of second half bridge drive unit；The second operating current signal is second drive signal.
In an embodiment of the present utility model, the first return difference protection location includes：First sampling resistor, is arranged at
Between the output end and ground of the first lower edge switch pipe, the of the first high side switches pipe or the first lower edge switch pipe is gathered
One operating current signal；The output end of the first high side switches pipe is connected with the output end of the first lower edge switch pipe；The
One capacitance-resistance filter, it is in parallel with first sampling resistor, processing is filtered to first operating current, output stabilization
First direct current sampled signal；First proportional amplifier, is connected with the output end of first capacitance-resistance filter, amplification described first
Direct current sampled signal；First protection circuit, is connected with the output end of first proportional amplifier, including the first guard time is matched somebody with somebody
Put unit, the first protection signal feedback unit；The first input end of the first protection signal feedback unit compares with described first
The output end of example amplifier is connected, the output end of the first protection signal feedback unit and first half bridge drive unit
Input is protected to be connected；It is first defeated that the first guard time dispensing unit is connected to the first protection signal feedback unit
Enter between end and the second input.
In an embodiment of the present utility model, the first input end of the first protection signal feedback unit passes through one or two
Pole pipe is connected with the output end of first proportional amplifier, prevents electric current backflow.
In an embodiment of the present utility model, the second return difference protection location includes：Second sampling resistor, is arranged at
Between the output end and ground of the second lower edge switch pipe, the of the second high side switches pipe or the second lower edge switch pipe is gathered
Two operating current signals；The output end of the second high side switches pipe is connected with the output end of the second lower edge switch pipe；The
Two capacitance-resistance filters, it is in parallel with second sampling resistor, processing is filtered to second operating current, output stabilization
Second direct current sampled signal；Second proportional amplifier, is connected with the output end of second capacitance-resistance filter, amplification described second
Direct current sampled signal；Second protection circuit, is connected with the output end of second proportional amplifier, including the second guard time is matched somebody with somebody
Put unit, the second protection signal feedback unit；The first input end of the second protection signal feedback unit compares with described second
The output end of example amplifier is connected, the output end of the second protection signal feedback unit and second half bridge drive unit
Input is protected to be connected；It is first defeated that the second guard time dispensing unit is connected to the second protection signal feedback unit
Enter between end and the second input.
In an embodiment of the present utility model, the first input end of the second protection signal feedback unit passes through one or two
Pole pipe is connected with the output end of second proportional amplifier, prevents electric current backflow.
The utility model also provides a kind of ultrasonic transducer, and the ultrasonic transducer is exported by the full-bridge drive device
First drive signal or the driving of the second drive signal.
The utility model also provides a kind of ultrasonic system, and the ultrasonic system includes the full-bridge drive device.
In an embodiment of the present utility model, the ultrasonic system be ultrasonic surgical systems, including main frame, with the master
The handle of mechatronics and the cutter for being installed on the handle front end, the full-bridge drive device is in the main frame, institute
State and ultrasonic transducer is provided with handle, the first drive signal of the full-bridge drive device output or the second drive signal driving institute
State ultrasonic transducer.
As described above, full-bridge drive device described in the utility model, ultrasonic transducer and ultrasonic system, have with following
Beneficial effect：
Full-bridge drive device or method described in the utility model can be applied to ultrasonic transducer, realize ultrasonic transducer
Full-bridge is driven, and the guard time during driving can flexibly be set, while also having the power defencive function with return difference.
Brief description of the drawings
One kind that Fig. 1 is shown as the full-bridge drive device described in the utility model embodiment realizes structural representation.
Fig. 2 a are shown as one kind of the first return difference protection location of the full-bridge drive device described in the utility model embodiment
Realize structural representation.
Fig. 2 b are shown as one kind of the second return difference protection location of the full-bridge drive device described in the utility model embodiment
Realize structural representation.
Fig. 3 is shown as a kind of exemplary circuit configuration signal of the full-bridge drive device described in the utility model embodiment
Figure.
Fig. 4 is shown as a kind of implementation process schematic diagram of the full-bridge driving method described in the utility model embodiment.
Fig. 5 is shown as a kind of of the method for work of the first return difference protection location described in the utility model embodiment and realizes stream
Journey schematic diagram.
Fig. 6 is shown as a kind of of the method for work of the second return difference protection location described in the utility model embodiment and realizes stream
Journey schematic diagram.
Component label instructions
100 full-bridge drive devices
110 first half-bridge driven modules
111 first half bridge drive units
112 first power drive units
113 first return difference protection locations
1131 first sampling resistors
1132 first capacitance-resistance filters
1133 first proportional amplifiers
1134 first protection circuits
120 second half-bridge driven modules
121 second half bridge drive units
122 second power drive units
123 second return difference protection locations
1231 second sampling resistors
1232 second capacitance-resistance filters
1232 second proportional amplifiers
1234 second protection circuits
200 ultrasonic transducers
S501~S504 steps
S601~S604 steps
Embodiment
Illustrate embodiment of the present utility model below by way of specific instantiation, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages of the present utility model and effect easily.The utility model can also be by addition
Different embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints with answering
With, without departing from it is of the present utility model spirit under carry out various modifications or alterations.It should be noted that, in situation about not conflicting
Under, the feature in following examples and embodiment can be mutually combined.
It should be noted that the diagram provided in following examples only illustrates of the present utility model basic in a schematic way
Conception, then in schema only display with relevant component in the utility model rather than according to component count during actual implement, shape
And size is drawn, it is actual when implementing, and kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout
Kenel may also be increasingly complex.
Referring to Fig. 1, the utility model embodiment provides a kind of full-bridge drive device, the full-bridge drive device 100 is wrapped
Include the first half-bridge driven module 110 and the second half-bridge driven module 120；First driving of the first half-bridge driven module output
Signal and the second drive signal of the second half-bridge driven module output drive a ultrasonic transducer 200.Wherein, ultrasonic transduction
Device 200 is to be used to supersonic operation treat class ultrasonic transducer.
The first half-bridge driven module 110 includes the first half bridge drive unit 111, the first power drive unit 112, the
One return difference protection location 113.First drive pulse signal of outside input is converted into by first half bridge drive unit 111
One flash drive signal and the first low side drive signal.First power drive unit 112 and the first half-bridge driven list
Member 111 is connected, and the first flash drive signal is zoomed into the first high side switches pipe drive signal drives the first high side switches
Pipe, and the described first low side drive signal is zoomed into the first lower edge switch pipe drive signal the first lower edge switch pipe of driving.Its
In, flash driving (High-side Driver, HSD) refer to by directly before electrical appliance or drive device by power supply
Line closure switch realize the enable of drive device, and low side driving (Low-side Driver, LSD) is then by electricity consumption
After device or drive device, realize that drive device is enabled by closing ground wire.The first return difference protection location 113 gathers institute
The first operating current signal of the first high side switches pipe or the first lower edge switch pipe is stated, the first operating current signal is changed
Into the first return difference protection signal, and by the first return difference protection signal transmission to first half bridge drive unit, institute is controlled
State the return difference of the first half bridge drive unit；The first operating current signal is first drive signal.Return difference is in instrument
In table whole measurement range, the maximum deviation between two characteristic curves obtained by tested value uplink and downlink, also referred to as instrument
The variation of table.This maximum deflection difference value is set, " return difference setting " is known as, includes the setting in stagnant ring and dead band.Stagnant ring
It is a kind of measuring apparatus output quantity characteristic relevant with the amount of being previously entered order.When input quantity is respectively by increasing direction, reduction side
To when reaching same amount, the difference of two output quantities is referred to as hysteresis error.Dead band refer to control less than region, it is general in frequency converter
Refer to " 0 " area of power device output voltage, electric current, the forward and reverse conversion voltage of motor, electric current are generally referred in transmission control
Zero passage area.Dead time is certainly the smaller the better, but why sets dead time, is that, for safety, therefore not can be without again.
Optimal setting is：Under the premise that security is guaranteed, dead band is the smaller the better, for the purpose of not fried power tube, output is not short-circuit.
The second half-bridge driven module 120 includes：Second half bridge drive unit 121, the second power drive unit 122,
Second return difference protection location 123.Second drive pulse signal of outside input is converted into by second half bridge drive unit 121
Second flash drive signal and the second low side drive signal.Second power drive unit 122 and second half-bridge driven
Unit 121 is connected, and the second flash drive signal is zoomed into the second high side switches pipe drive signal drives the second flash to open
Guan Guan, and the described second low side drive signal is zoomed into the second lower edge switch pipe drive signal the second lower edge switch pipe of driving.
The second return difference protection location 123 gathers the second operating current letter of the second high side switches pipe or the second lower edge switch pipe
Number, the second operating current signal is converted into the second return difference protection signal, and by the second return difference protection signal transmission
To second half bridge drive unit, the return difference of second half bridge drive unit is controlled；The second operating current signal is
For second drive signal.
Referring to shown in Fig. 2 a, the first return difference protection location 113 includes：First sampling resistor 1131, the filter of the first capacitance-resistance
Ripple device 1132, the first proportional amplifier 1133, the first protection circuit 1134.First sampling resistor 1131 is arranged at described
Between the output end and ground of one lower edge switch pipe, the first work of the first high side switches pipe or the first lower edge switch pipe is gathered
Current signal；The output end of the first high side switches pipe is connected with the output end of the first lower edge switch pipe；Described first
Capacitance-resistance filter 1132 is in parallel with first sampling resistor, and processing is filtered to first operating current, and output is stable
The first direct current sampled signal；First proportional amplifier 1133 is connected with the output end of first capacitance-resistance filter, puts
The big first direct current sampled signal；First protection circuit 1134 is connected with the output end of first proportional amplifier,
Including the first guard time dispensing unit, the first protection signal feedback unit；The first of the first protection signal feedback unit
Input is connected with the output end of first proportional amplifier, the output end of the first protection signal feedback unit with it is described
The protection input of first half bridge drive unit is connected；The first guard time dispensing unit is connected to the first protection letter
Between the first input end and the second input of number feedback unit.The first input end of the first protection signal feedback unit leads to
The output end that a diode is crossed with first proportional amplifier is connected, and prevents electric current backflow.
Referring to shown in Fig. 2 b, the second return difference protection location 123 includes：Second sampling resistor 1231, the filter of the second capacitance-resistance
Ripple device 1232, the second proportional amplifier 1233, the second protection circuit 1234.Second sampling resistor 1231 is arranged at described
Between the output end and ground of two lower edge switch pipes, the second work of the second high side switches pipe or the second lower edge switch pipe is gathered
Current signal；The output end of the second high side switches pipe is connected with the output end of the second lower edge switch pipe；Described second
Capacitance-resistance filter 1232 is in parallel with second sampling resistor, and processing is filtered to second operating current, and output is stable
The second direct current sampled signal；Second proportional amplifier 1233 is connected with the output end of second capacitance-resistance filter, puts
The big second direct current sampled signal；Second protection circuit 1234 is connected with the output end of second proportional amplifier,
Including the second guard time dispensing unit, the second protection signal feedback unit；The first of the second protection signal feedback unit
Input is connected with the output end of second proportional amplifier, the output end of the second protection signal feedback unit with it is described
The protection input of second half bridge drive unit is connected；The second guard time dispensing unit is connected to the second protection letter
Between the first input end and the second input of number feedback unit.The first input end of the second protection signal feedback unit leads to
The output end that a diode is crossed with second proportional amplifier is connected, and prevents electric current backflow.
Fig. 3 is a kind of exemplary circuit configuration of the full-bridge drive device, and it is by two groups of completely identical in structure half-bridges
Electrical combination is formed.First group of half-bridge circuit includes half-bridge driven chip U1, power drive chip U2, the first high side switches pipe
Q1, the first lower edge switch pipe Q2, resistance R10, proportional amplifier U3A, comparator U3B；Half-bridge driven chip U1 and power drive
Chip U2 is connected, and power drive chip U2 is connected with the first high side switches pipe Q1 and the first lower edge switch pipe Q2 respectively, resistance R10
It is connected respectively with the first high side switches pipe Q1 and the first lower edge switch pipe Q2, proportional amplifier U3A passes through capacitance-resistance filter and electricity
R10 is hindered to be connected；Comparator U3B is connected by a protection circuit with proportional amplifier U3A, and protection circuit includes D4, C6, R11；D4
Effect be to prevent electric current backflow, it is ensured that guard time；C6, R11 are used for the configuration protection time；U3b respectively with R7, R12, R13,
R15, R16 are connected, and realize the defencive function with return difference.First half bridge drive unit is half-bridge driven chip U1；It is described
First power drive unit is power drive chip U2；The first high side switches pipe is the first high side switches pipe Q1；Described
One lower edge switch pipe is the first lower edge switch pipe Q2；First sampling resistor is resistance R10；First capacitance-resistance filter is
The R6 and C5 in parallel with R10；First proportional amplifier is proportional amplifier U3A；The first guard time dispensing unit
The D4 being connected including the output end with the proportional amplifier U3A, and the C6 and R11 connected respectively with D4；D4 effect is anti-
Only electric current backflow, it is ensured that guard time；C6 and R11 parallel connections are used for the configuration protection time；The first protection signal feedback unit
Including U3B, R7, R12, R13, R15, R16；Wherein R12 is connected between U3B positive input and output end, and R7 is connected to
Between U3B output end and voltage VCC, R13 and R15 are connected in series between U3B positive input and voltage VCC, and R16 is connected to
Between R13 and ground.
Wherein, drive signal PWM 1 passes through half-bridge driven chip U1, produces the first flash drive signal PWM-H and first
Low side drive signal PWM-L, signal PWM-H and PWM-L produce switching tube driving letter after power drive chip U2 amplification
Number PWM-H_1 and PWM-L_1, for directly driving the first high side switches pipe Q1 and the first lower edge switch pipe Q2；Resistance R10 is to
One high side switches pipe Q1 and the first lower edge switch pipe Q2 operating current are sampled, and can obtain signal Vs；Vs passes through capacitance-resistance
The direct current sampled signal Vs_1 stablized is filtered, then signal Vs_2 is obtained by proportional amplifier U3A amplifications；Vs_2 by D4,
C6, R11 obtain signal Vs_3.Vs_3 obtains circuit protection signal Vd by comparator U3B.
Specifically, the drive signal PWM 1 produced by external circuit passes through half-bridge driven chip U1, produces the first flash and drives
The low side drive signal PWM-L of dynamic signal PWM-H and first, are respectively used to the first high side switches pipe Q1 of driving and the first lower edge switch
Pipe Q2.Chip U1 can set PWM-H and PWM-L dead time, prevent switching tube from damaging.Due to half-bridge driven chip U1's
Driving current is limited, and signal PWM-H and PWM-L produces switching tube drive signal PWM- after power drive chip U2 amplification
H_1 and PWM-L_1, for directly driving switching tube.Sampled, can be obtained by the operating current of resistance R10 switch tubes
To signal Vs, Vs passes through the direct current sampled signal Vs_1 that capacitance-resistance filter is stablized, then obtains letter by proportional amplifier U3A amplifications
Number Vs_2.Vs_2 obtains signal Vs_3 by D4, C6, R11.Vs_3 obtains circuit protection signal Vd by comparator U3B.Its
In, D4 effect is to prevent electric current backflow, it is ensured that guard time；C6, R11 are used for the configuration protection time；U3b、R7、R12、R13、
R15, R16 realize the defencive function with return difference.
Second group of half-bridge circuit and the structure and principle of first group of half-bridge circuit are all identical.Second half-bridge driven
Unit is half-bridge driven chip U4；Second power drive unit is power drive chip U5；The second high side switches pipe
For the second high side switches pipe Q3；The second lower edge switch pipe is the second lower edge switch pipe Q4；Second sampling resistor is electricity
Hinder R26；Second capacitance-resistance filter is the R22 and C12 in parallel with R26；Second proportional amplifier is proportional amplifier
U6A；The second guard time dispensing unit includes the D8 that is connected with the output end of the proportional amplifier U6A, and respectively with
The C13 and R27 of D8 series connection；C13 and R27 parallel connections are used for the configuration protection time；The second protection signal feedback unit includes
U6B、R23、R28、R29、R31、R32；Wherein R28 is connected between U6B positive input and output end, and R23 is connected to U6B
Output end and voltage VCC between, R29 and R31 are connected in series between U6B positive input and voltage VCC, and R32 is connected to R29
Between ground.
Full-bridge drive device described in the utility model has more preferable carrying load ability, reduces energy loss, and use
Return difference control can preferably protection switch pipe.
The utility model also provides a kind of full-bridge driving method, and the full-bridge drive device can realize the utility model institute
The full-bridge driving method stated, but full-bridge driving method described in the utility model realizes device including but not limited to the present embodiment
The structure for the full-bridge drive device enumerated, the malformation of every prior art done according to principle of the present utility model and is replaced
Change, be included in protection domain of the present utility model.
The protection domain of full-bridge driving method described in the utility model be not limited to the step of the present embodiment is enumerated perform it is suitable
Sequence, it is every done according to principle of the present utility model prior art the step of increase and decrease, step replace realized scheme and all wrap
Include in protection domain of the present utility model.
Shown in Figure 4, the full-bridge driving method includes：The first drive signal that first half-bridge driven module is exported
A ultrasonic transducer is driven with the second drive signal that the second half-bridge driven module is exported.
Wherein, shown in Figure 1, the first half-bridge driven module 110 includes the first half bridge drive unit 111, first
Power drive unit 112, the first return difference protection location 113.First half bridge drive unit 111 is driven the first of outside input
Moving pulse signal is converted into the first flash drive signal and the first low side drive signal.First power drive unit 112 with
First half bridge drive unit 111 is connected, and the first flash drive signal is zoomed into the first high side switches pipe driving letter
Number driving the first high side switches pipe, and by the described first low side drive signal zoom into the first lower edge switch pipe drive signal driving
First lower edge switch pipe.The first return difference protection location 113 gathers the first high side switches pipe or the first lower edge switch pipe
The first operating current signal, the first operating current signal is converted into the first return difference protection signal, and by described first
Return difference protection signal transmission controls the return difference of first half bridge drive unit to first half bridge drive unit；Described
One operating current signal is first drive signal.
The second half-bridge driven module 120 includes：Second half bridge drive unit 121, the second power drive unit 122,
Second return difference protection location 123.Second drive pulse signal of outside input is converted into by second half bridge drive unit 121
Second flash drive signal and the second low side drive signal.Second power drive unit 122 and second half-bridge driven
Unit 121 is connected, and the second flash drive signal is zoomed into the second high side switches pipe drive signal drives the second flash to open
Guan Guan, and the described second low side drive signal is zoomed into the second lower edge switch pipe drive signal the second lower edge switch pipe of driving.
The second return difference protection location 123 gathers the second operating current letter of the second high side switches pipe or the second lower edge switch pipe
Number, the second operating current signal is converted into the second return difference protection signal, and by the second return difference protection signal transmission
To second half bridge drive unit, the return difference of second half bridge drive unit is controlled；The second operating current signal is
For second drive signal.
Shown in Figure 5, the method for work of the first return difference protection location includes：
S501, institute is gathered using the first sampling resistor being arranged between the output end and ground of the first lower edge switch pipe
State the first operating current signal of the first high side switches pipe or the first lower edge switch pipe；The output end of the first high side switches pipe
Connected with the output end of the first lower edge switch pipe；
S502, is carried out using the first capacitance-resistance filter in parallel with first sampling resistor to first operating current
Filtering process, exports the first stable direct current sampled signal；
S503, the first proportional amplifier amplification described first being connected using the output end with first capacitance-resistance filter
Direct current sampled signal；
S504, the first protection circuit being connected using the output end with first proportional amplifier is by first return difference
Protection signal transmission is to first half bridge drive unit；First protection circuit includes the first guard time dispensing unit,
First protection signal feedback unit；The first input end of the first protection signal feedback unit and first proportional amplifier
Output end be connected, the protection of the output end of the first protection signal feedback unit and first half bridge drive unit is inputted
End is connected；The first guard time dispensing unit is connected to the first input end and of the first protection signal feedback unit
Between two inputs.
Shown in Figure 6, the method for work of the second return difference protection location includes：
S601, institute is gathered using the second sampling resistor being arranged between the output end and ground of the second lower edge switch pipe
State the second operating current signal of the second high side switches pipe or the second lower edge switch pipe；The output end of the second high side switches pipe
Connected with the output end of the second lower edge switch pipe；
S602, is carried out using the second capacitance-resistance filter in parallel with second sampling resistor to second operating current
Filtering process, exports the second stable direct current sampled signal；
S603, the second proportional amplifier amplification described second being connected using the output end with second capacitance-resistance filter
Direct current sampled signal；
S604, the second protection circuit being connected using the output end with second proportional amplifier is by second return difference
Protection signal transmission is to second half bridge drive unit；Second protection circuit includes the second guard time dispensing unit,
Second protection signal feedback unit；The first input end of the second protection signal feedback unit and second proportional amplifier
Output end be connected, the protection of the output end of the second protection signal feedback unit and second half bridge drive unit is inputted
End is connected；The second guard time dispensing unit is connected to the first input end and of the second protection signal feedback unit
Between two inputs.
Full-bridge drive device or method described in the utility model can be applied to ultrasonic transducer, realize ultrasonic transducer
Full-bridge is driven, and the guard time during driving can flexibly be set, while also having the power defencive function with return difference.
The utility model embodiment also provides a kind of ultrasonic transducer, and the ultrasonic transducer is by above-mentioned full-bridge drive device
First drive signal of output or the driving of the second drive signal.
The utility model embodiment also provides a kind of ultrasonic system, and the ultrasonic system includes the full-bridge drive device.
The ultrasonic system can be ultrasonic surgical systems, such as ultrasound osteotome system, ultrasonic suction knife system, ultrasonic cut hemostatic cutter system
System etc., further, the ultrasonic surgical systems may also include main frame, the handle electrically connected with the main frame and be installed on
The cutter of the handle front end, the full-bridge drive device is in the main frame, and the ultrasonic transducer is located at the handle
Interior, the first drive signal or the second drive signal of the full-bridge drive device output drive the ultrasonic transducer, described super
Sonic transducer converts electrical energy into mechanical energy and passes to the cutter and tissue is handled.Or the ultrasonic system is ultrasound
Test system.
In summary, the utility model effectively overcomes various shortcoming of the prior art and has high industrial exploitation value
Value.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.
Claims (10)
1. a kind of full-bridge drive device, it is characterised in that：The full-bridge drive device includes the first half-bridge driven module and second
Half-bridge driven module；First drive signal of the first half-bridge driven module output and the second half-bridge driven module output
The second drive signal drive a ultrasonic transducer；
The first half-bridge driven module includes：
First half bridge drive unit, the first flash drive signal and first are converted into by the first drive pulse signal of outside input
Low side drive signal；
First power drive unit, is connected with first half bridge drive unit, and the first flash drive signal is zoomed into
First high side switches pipe drive signal drives the first high side switches pipe, and that the described first low side drive signal is zoomed into first is low
Side switching tube drive signal drives the first lower edge switch pipe；
First return difference protection location, gathers the first operating current letter of the first high side switches pipe or the first lower edge switch pipe
Number, the first operating current signal is converted into the first return difference protection signal, and by the first return difference protection signal transmission
To first half bridge drive unit, the return difference of first half bridge drive unit is controlled；The first operating current signal is
For first drive signal；
The second half-bridge driven module includes：
Second half bridge drive unit, the second flash drive signal and second are converted into by the second drive pulse signal of outside input
Low side drive signal；
Second power drive unit, is connected with second half bridge drive unit, and the second flash drive signal is zoomed into
Second high side switches pipe drive signal drives the second high side switches pipe, and that the described second low side drive signal is zoomed into second is low
Side switching tube drive signal drives the second lower edge switch pipe；
Second return difference protection location, gathers the second operating current letter of the second high side switches pipe or the second lower edge switch pipe
Number, the second operating current signal is converted into the second return difference protection signal, and by the second return difference protection signal transmission
To second half bridge drive unit, the return difference of second half bridge drive unit is controlled；The second operating current signal is
For second drive signal.
2. full-bridge drive device according to claim 1, it is characterised in that：The first return difference protection location includes：
First sampling resistor, is arranged between the output end of the first lower edge switch pipe and ground, gathers first flash and opens
Close the first operating current signal of pipe or the first lower edge switch pipe；The output end of the first high side switches pipe and described first low
The output end series connection of side switching tube；
First capacitance-resistance filter, it is in parallel with first sampling resistor, processing is filtered to first operating current, exported
The first stable direct current sampled signal；
First proportional amplifier, is connected with the output end of first capacitance-resistance filter, amplifies the first direct current sampled signal；
First protection circuit, is connected with the output end of first proportional amplifier, including the first guard time dispensing unit, the
One protection signal feedback unit；The first input end of the first protection signal feedback unit and first proportional amplifier
Output end is connected, the protection input of the output end of the first protection signal feedback unit and first half bridge drive unit
It is connected；The first guard time dispensing unit is connected to the first input end and second of the first protection signal feedback unit
Between input.
3. full-bridge drive device according to claim 2, it is characterised in that：The of the first protection signal feedback unit
One input is connected by a diode with the output end of first proportional amplifier, prevents electric current backflow.
4. full-bridge drive device according to claim 2, it is characterised in that：First half bridge drive unit is driven for half-bridge
Dynamic chip U1；First power drive unit is power drive chip U2；The first high side switches pipe is that the first flash is opened
Close pipe Q1；The first lower edge switch pipe is the first lower edge switch pipe Q2；First sampling resistor is resistance R10；Described
One capacitance-resistance filter is the R6 and C5 in parallel with R10；First proportional amplifier is proportional amplifier U3A；Described first protects
Shield time dispensing unit includes the D4 that is connected with the output end of the proportional amplifier U3A, and the C6 that is connected respectively with D4 and
R11；D4 effect is to prevent electric current backflow, it is ensured that guard time；C6 and R11 parallel connections are used for the configuration protection time；Described first
Protection signal feedback unit includes U3B, R7, R12, R13, R15, R16；Wherein R12 is connected to U3B positive input and output
Between end, R7 is connected between U3B output end and voltage VCC, and R13 and R15 are connected in series in U3B positive input and voltage
Between VCC, R16 is connected between R13 and ground.
5. full-bridge drive device according to claim 1, it is characterised in that：The second return difference protection location includes：
Second sampling resistor, is arranged between the output end of the second lower edge switch pipe and ground, gathers second flash and opens
Close the second operating current signal of pipe or the second lower edge switch pipe；The output end of the second high side switches pipe and described second low
The output end series connection of side switching tube；
Second capacitance-resistance filter, it is in parallel with second sampling resistor, processing is filtered to second operating current, exported
The second stable direct current sampled signal；
Second proportional amplifier, is connected with the output end of second capacitance-resistance filter, amplifies the second direct current sampled signal；
Second protection circuit, is connected with the output end of second proportional amplifier, including the second guard time dispensing unit, the
Two protection signal feedback units；The first input end of the second protection signal feedback unit and second proportional amplifier
Output end is connected, the protection input of the output end of the second protection signal feedback unit and second half bridge drive unit
It is connected；The second guard time dispensing unit is connected to the first input end and second of the second protection signal feedback unit
Between input.
6. full-bridge drive device according to claim 5, it is characterised in that：The of the second protection signal feedback unit
One input is connected by a diode with the output end of second proportional amplifier, prevents electric current backflow.
7. full-bridge drive device according to claim 5, it is characterised in that：Second half bridge drive unit is driven for half-bridge
Dynamic chip U4；Second power drive unit is power drive chip U5；The second high side switches pipe is that the second flash is opened
Close pipe Q3；The second lower edge switch pipe is the second lower edge switch pipe Q4；Second sampling resistor is resistance R26；Described
Two capacitance-resistance filters are the R22 and C12 in parallel with R26；Second proportional amplifier is proportional amplifier U6A；Described second
Guard time dispensing unit includes the D8 that is connected with the output end of the proportional amplifier U6A, and the C13 that is connected respectively with D8 and
R27；C13 and R27 parallel connections are used for the configuration protection time；The second protection signal feedback unit include U6B, R23, R28, R29,
R31、R32；Wherein R28 is connected between U6B positive input and output end, and R23 is connected to U6B output end and voltage
Between VCC, R29 and R31 are connected in series between U6B positive input and voltage VCC, and R32 is connected between R29 and ground.
8. a kind of ultrasonic transducer, it is characterised in that：The ultrasonic transducer is as described in any one of claim 1 to 7
First drive signal of full-bridge drive device output or the driving of the second drive signal.
9. a kind of ultrasonic system, it is characterised in that：The ultrasonic system includes the full-bridge as described in any one of claim 1 to 7
Drive device.
10. ultrasonic system according to claim 9, it is characterised in that：The ultrasonic system is ultrasonic surgical systems, including
Main frame, the handle electrically connected with the main frame and the cutter for being installed on the handle front end, the full-bridge drive device are located at
In the main frame, ultrasonic transducer, the first drive signal or second of the full-bridge drive device output are provided with the handle
Drive signal drives the ultrasonic transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186396.2U CN206509213U (en) | 2017-02-28 | 2017-02-28 | Full-bridge drive device, ultrasonic transducer and ultrasonic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720186396.2U CN206509213U (en) | 2017-02-28 | 2017-02-28 | Full-bridge drive device, ultrasonic transducer and ultrasonic system |
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| CN206509213U true CN206509213U (en) | 2017-09-22 |
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| CN201720186396.2U Active CN206509213U (en) | 2017-02-28 | 2017-02-28 | Full-bridge drive device, ultrasonic transducer and ultrasonic system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106622925A (en) * | 2017-02-28 | 2017-05-10 | 重庆西山科技股份有限公司 | Full-bridge driving device/method, ultrasonic transducer and ultrasonic system |
| CN110071135A (en) * | 2018-01-24 | 2019-07-30 | 艾蒙半导体公司 | Equipment for manipulating ultrasonic tr-ansducer, especially ultrasonic transducer |
| CN114069809A (en) * | 2020-08-05 | 2022-02-18 | 艾尔默斯半导体欧洲股份公司 | Transformerless activation of ultrasonic transducers with only one external energy storage |
-
2017
- 2017-02-28 CN CN201720186396.2U patent/CN206509213U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106622925A (en) * | 2017-02-28 | 2017-05-10 | 重庆西山科技股份有限公司 | Full-bridge driving device/method, ultrasonic transducer and ultrasonic system |
| CN106622925B (en) * | 2017-02-28 | 2022-03-01 | 重庆西山科技股份有限公司 | Full-bridge driving device/method, ultrasonic transducer and ultrasonic system |
| CN110071135A (en) * | 2018-01-24 | 2019-07-30 | 艾蒙半导体公司 | Equipment for manipulating ultrasonic tr-ansducer, especially ultrasonic transducer |
| CN110071135B (en) * | 2018-01-24 | 2023-05-05 | 艾蒙半导体公司 | Device for actuating an ultrasound transducer, in particular an ultrasound transducer |
| CN114069809A (en) * | 2020-08-05 | 2022-02-18 | 艾尔默斯半导体欧洲股份公司 | Transformerless activation of ultrasonic transducers with only one external energy storage |
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