CN104506115B - Voice coil motor high-speed driving system based on N channel and P channel MOSFET - Google Patents
Voice coil motor high-speed driving system based on N channel and P channel MOSFET Download PDFInfo
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- CN104506115B CN104506115B CN201410719907.3A CN201410719907A CN104506115B CN 104506115 B CN104506115 B CN 104506115B CN 201410719907 A CN201410719907 A CN 201410719907A CN 104506115 B CN104506115 B CN 104506115B
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Abstract
Voice coil motor high-speed driving system based on N channel and P channel MOSFET, it is related to a kind of drive system of voice coil motor, there is the wasting of resources in the integrated bridge driver for solving existing use high pressure field, and cause the problems such as motor can not work, primarily directed to the relatively low working frequency of voice coil motor operating voltage it is high the characteristics of, constitute H bridge motor-drive circuit using two N channels and two P channel MOSFET and related device.The upper underarm conducting of bridge, the strong drive signal of high frequency is exported using high-speed CCD driver when the invention avoids the occurrence of electric using logic circuit；According to opening and the characteristics of the shut-in time is different for N and P channel MOSFET, the driving logical signal of controller output avoids underarm in dynamic changing process and simultaneously turned on；Drive system electric sequence is provided in addition.The present invention avoids the upper underarm of the drive axle during the dynamic driving of voice coil motor from turning on power consumption increase.
Description
Technical field
The present invention relates to a kind of drive system of voice coil motor, and in particular to a kind of AEROSPACE APPLICATION meets high reliability request
Voice coil motor high-speed driving system.
Background technology
At present, the higher rapid control reflector of band requirement uses Piezoelectric Ceramic, its structural resonance frequency mostly
Hundreds of, or even thousand hertz can be up to, but required driving voltage typically wants several hectovolts, and the stroke of driver is small, and one
As only ten a few to tens of microns.And the stroke ratio piezoelectric ceramics of voice coil motor is higher by two orders of magnitude, driving voltage is generally low
Yu Ershi is lied prostrate.Voice coil motor (VCM) is by considering that loudspeaker is by according to the tone currents flowed in the voice coil loudspeaker voice coil of loudspeaker
And the fact that vibrated back and forth as the power produced by the Fleming's left-hand rule between the magnetic force that permanent magnet is produced develop.Direct current
Machine or stepper motor are rotated, however, voice coil motor can carry out short distance straight reciprocating motion, thus voice coil motor
Available for rapid control reflector.
The integrated bridge driver of motor such as IR2130 now is powerful, but is typically such as to reach as high as 600V for high pressure
Field in apply, the operating voltage of bridge driver is not less than 12V, in addition it is also necessary to carry out H bridge grid voltages using external capacitive
Bootstrap, when capacitance parameter selects unreasonable, may cause motor can not work or even cause damage.The quick control of correspondence is anti-
Penetrate mirror, it is necessary to torque it is small, operating voltage is relatively low such as 5V, is not only existed using the integrated bridge driver applied to high pressure field and provided
Source is wasted, it is also possible to which appearance causes chip to occur not working protecting because feedback voltage is too low, and buying meets space flight and answered
It is difficult with desired low pressure applications product, it is therefore desirable to which that Fine design is carried out to the drive circuit of voice coil motor.
The content of the invention
There is the wasting of resources in the present invention, and cause motor can not to solve the integrated bridge driver of existing use high pressure field
The problems such as work, there is provided a kind of voice coil motor high-speed driving system based on N channel and P channel MOSFET.
Voice coil motor high-speed driving system based on N channel and P channel MOSFET, including the protection of controller, combinational logic
Circuit, integrated drive and H-bridge drive circuit；It is combined that the controller exports four road logical signal Ain, Bin, Cin and Din
The driving of four tunnels logical signal A, B, C and D are formed after virtual protection processing of circuit, four road is driven into logical signal A, B, C and D
Send into integrated drive and carry out power amplification, obtain four road drive signal A_BUF, B_BUF, C_BUF and D_BUF, four tunnel
Drive signal A_BUF, B_BUF, C_BUF and D_BUF are used to drive H-bridge drive circuit, and the H-bridge drive circuit passes through to described
The low and high level and dutycycle of four road drive signals are adjusted, and realize the direction to voice coil motor and the control of speed；It is described
The four tunnels driving logical signal of combinational logic protection circuit output is required to meet following condition：Drive logical signal A and C phase phase
Instead, driving logical signal B and D positive pulse width are less than A and C positive pulse width；The driving logical signal B rising edges are delayed
Logical signal A rising edge is driven, the logical signal D delayed driving logical signal C of rising edge rising edge is driven, and it is delayed
Time is more than p-type MOSFET from the time for being conducting to cut-off, the trailing edge drive of lead logical signal of the driving logical signal B
A trailing edge, driving logical signal D trailing edge drive of lead logical signal C trailing edge, and advanced time are more than N-type
MOSFET is from the transit time for being conducting to shut-off.
Beneficial effects of the present invention：
First, the present invention passes through strict electric sequence requirement and combinational logic protection circuit, it is to avoid driven during upper electricity
The upper underarm conducting power consumption increase of bridge, burns device.
2nd, by the present invention in that with p-type and N-type MOSFET combination, two kinds of MOSFET source electrode is all to fix
Voltage, the control signal of grid only needs less amplitude (being more than threshold voltage) that driving can be achieved.
3rd, the present invention drives logical signal to be defined by four roads exported to controller, it is to avoid in voice coil motor
The upper underarm conducting power consumption increase of drive axle during dynamic driving.
Brief description of the drawings
Fig. 1 is voice coil loudspeaker voice coil electricity in the voice coil motor high-speed driving system of the present invention based on N channel and P channel MOSFET
Machine drive system block diagram；
Fig. 2 is H bridges drive in the voice coil motor high-speed driving system of the present invention based on N channel and P channel MOSFET
Dynamic circuit theory diagrams；
Fig. 3 patrols to be combined in the voice coil motor high-speed driving system of the present invention based on N channel and P channel MOSFET
Iho protection circuit schematic diagram.
Embodiment
Embodiment one, with reference to Fig. 1 to Fig. 3 illustrate present embodiment, the sound based on N channel and P channel MOSFET
Enclose motor high-speed driving system, including controller, combinational logic protection circuit, integrated drive and H-bridge drive circuit；Its feature
It is that the controller forms four tunnels after exporting the four combined virtual protection processing of circuit of road logical signal Ain, Bin, Cin and Din
Logical signal A, B, C and D are driven, drives logical signal A, B, C and D feeding integrated drive to carry out power on four tunnel and puts
Greatly, four road drive signal A_BUF, B_BUF, C_BUF and D_BUF, described four roads drive signal A_BUF, B_BUF, C_BUF are obtained
Be used to drive H-bridge drive circuit with D_BUF, the H-bridge drive circuit by the low and high level to four road drive signal and
Dutycycle is adjusted, and realizes the direction to voice coil motor and the control of speed；Driving logical signal A and the C opposite in phase,
The positive pulse width for driving logical signal B and D positive pulse width to be less than A and C；
Rising edge (the corresponding diagram of the delayed driving logical signal A of driving logical signal B rising edges described in present embodiment
Time delay of n NOT gate+1 and the time delay of door in 3), the driving logical signal D delayed driving logical signal of rising edge
C rising edge, and delayed time be more than p-type MOSFET from the time for being conducting to cut-off, the decline of the driving logical signal B
Along drive of lead logical signal A trailing edge (time delay of n NOT gate -1 and the time delay of door in corresponding diagram 3), drive
Logical signal D trailing edge drive of lead logical signal C trailing edge is moved, and the advanced time is more than N-type MOSFET from conducting
To the transit time of shut-off.
Illustrate present embodiment with reference to Fig. 2, Fig. 2 is H-bridge drive circuit used in the present invention, by two groups of push-pull configurations
N channel MOSFET and P channel MOSFET and four fly-wheel diode compositions.The operating voltage of H-bridge drive circuit can be according to electricity
Machine and load characteristic are chosen, and setting is no more than 15V.The high pressure of H-bridge drive circuit is VCC (VCC≤15), and low pressure is 0, for sound
Motor is enclosed, a kind of control method is the control signal of four Transistor-Transistor Logic levels of controller output, wherein corresponding A _ BUF's and C_BUF
Input control signal Ain and Cin completely on the contrary, to avoid on H bridges two MOSFET on per arm from simultaneously turning on, reserve dead time,
Regulation correspondence B_BUF and D_BUF input control signal Bin and Din positive pulse width is being respectively smaller than A_BUF and C_BUF just
Pulse width Ain and Cin, then now the conduction time of voice coil motor coil in either direction respectively by correspondence B_BUF and D_BUF
Input control signal Bin and Din positive pulse width determine.
According to N and P channel MOSFET working characteristics, for N channel MOSFET, when grid higher than source electrode threshold voltage is
Conducting can be achieved, it is contemplated that reliability, the low level of integrated drive output is less than (threshold voltage (Vthn) -1) V, can be straight
Connect and be set to 0V, the high level of output is higher than (threshold voltage (Vthn)+1)；For P channel MOSFET, when grid is less than source
Pole threshold voltage is that conducting can be achieved, it is contemplated that reliability, and the high level of integrated drive output is set to VCC, output it is low
Level is less than (VCC-Vthn- 1).So, setting power supply voltage VCC can be needed (to be higher than MOSFET's according to application
Threshold voltage, usually 4V) value, and external capacitive need not be used to carry out Bootstrap, more need not be with motor
Reactance parameter is matched, and reduces design difficulty.
Illustrate to use combinational logic circuit in present embodiment, present embodiment with reference to Fig. 3, its effect is when avoiding electric
Due to controller output in logic nondeterministic statement or controller processing logic error so as to there is the upper of drive axle
Underarm is turned on.Shown in the expression formula of the pulse width of output such as formula (1), ensure to export by the mutual exclusion function of combinational logic circuit
A it is different from B, C and D when for height, and using gate circuit delay feature, enough dead bands can be reserved to H-bridge drive circuit
Time.
N >=1 in above formula.
It is that outside master control system is controlled device, group first that the electric sequence of drive system described in present embodiment, which is,
The upper electricity of logical protection circuit and integrated drive, when detecting controller, combinational logic protection circuit and integrated drive
Operating voltage deviation be less than 5%, and controller can communicate with master control system, and integrated drive is exported can make four
Fixed logic levels of the MOSFET all in off state (A_BUF and B_BUF is height in such as Fig. 2, and C_BUF and D_BUF are low)
The upper electricity of H-bridge drive circuit can be carried out afterwards.
H-bridge drive circuit described in present embodiment using IR companies P and N channel MOSFET element IRHM7250 and
IRHM9130 is constituted；Combinational logic protection circuit is constituted using NOT gate and with door；Integrated drive uses CCD drivers
EL7212；Voice coil motor is customed product, operating voltage 5V, peak point current 1.6A；Controller uses the dsp chip of TI companies.
Claims (4)
1. the voice coil motor high-speed driving system based on N channel and P channel MOSFET, including controller, combinational logic protection electricity
Road, integrated drive and H-bridge drive circuit；It is characterized in that, the controller export four road logical signal Ain, Bin, Cin and
The driving of four tunnels logical signal A, B, C and D are formed after the combined virtual protection processing of circuit of Din, by four tunnel driving logic letter
Number A, B, C and D feeding integrated drive carry out power amplification, obtain four road drive signal A_BUF, B_BUF, C_BUF and D_
BUF, described four roads drive signal A_BUF, B_BUF, C_BUF and D_BUF are used to drive H-bridge drive circuit, the H bridges driving electricity
Road is adjusted by low and high level and dutycycle to four road drive signal, realizes the direction to voice coil motor and speed
Control；
The four tunnels driving logical signal of the combinational logic protection circuit output is required to meet following condition：
Logical signal A and C opposite in phase is driven, driving logical signal B and D positive pulse width are less than A and C positive pulse width；
The rising edge of the delayed driving logical signal A of driving logical signal B rising edges, driving logical signal D rising edge is stagnant
Logical signal C rising edge is driven afterwards, and the delayed time is more than p-type MOSFET from the time for being conducting to cut-off, the driving
Logical signal B trailing edge drive of lead logical signal A trailing edge, driving logical signal D trailing edge drive of lead logic
Signal C trailing edge, and advanced time be more than N-type MOSFET from the transit time for being conducting to shut-off；
Described four roads logical signal Ain, Bin, Cin and Din and four tunnels driving logical signal A, B, C and D relation are as follows：Formula
Middle n is the positive integer more than or equal to 1；
A=Ain
B positive pulse width is the delay time that positive pulse of the Ain and Bin phases with after shortens 2n times of NOT gate
C=Cin
D positive pulse width is the delay time that positive pulse of the Cin and Din phases with after shortens 2n times of NOT gate.
2. the voice coil motor high-speed driving system according to claim 1 based on N channel and P channel MOSFET, its feature
It is, described H-bridge drive circuit, N channel MOSFET and P channel MOSFET and four afterflows two by two groups of push-pull configurations
Pole pipe is constituted；The operating voltage of H-bridge drive circuit is chosen according to motor and load characteristic, and setting is no more than 15V.
3. the voice coil motor high-speed driving system according to claim 1 based on N channel and P channel MOSFET, the H bridges
The power supply voltage of drive circuit is VCC, and VCC is less than or equal to 15V；The MOSFET pipes of correspondence N-type, integrated drive output
Drive signal low level is 0V, and high level is Vthn+ 1, the VthnFor N-type MOSFET threshold voltage；The MOSFET of correspondence p-type
Pipe, integrated drive output drive signal low level is VCC-Vthp- 1, the power supply voltage of high level and H-bridge drive circuit
It is identical, the VthpFor p-type MOSFET threshold voltage.
4. the voice coil motor high-speed driving system according to claim 1 based on N channel and P channel MOSFET, its feature
It is, the electric sequence of the drive system is：Outside master control system is controlled device, combinational logic protection circuit and integrated drive
The upper electricity of dynamic device, the operating voltage deviation for detecting controller, combinational logic protection circuit and integrated drive is respectively less than 5%,
And controller communicates with master control system, and integrated drive exports the fixed logic level for making MOSFET be off state
When, carry out the upper electricity of H-bridge drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410719907.3A CN104506115B (en) | 2014-12-01 | 2014-12-01 | Voice coil motor high-speed driving system based on N channel and P channel MOSFET |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410719907.3A CN104506115B (en) | 2014-12-01 | 2014-12-01 | Voice coil motor high-speed driving system based on N channel and P channel MOSFET |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104506115A CN104506115A (en) | 2015-04-08 |
| CN104506115B true CN104506115B (en) | 2017-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410719907.3A Expired - Fee Related CN104506115B (en) | 2014-12-01 | 2014-12-01 | Voice coil motor high-speed driving system based on N channel and P channel MOSFET |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540289A (en) * | 2018-12-06 | 2019-03-29 | 昆明理工大学 | A kind of height control clothes-airing hanger based on light-intensity test |
| CN112104205A (en) * | 2020-08-14 | 2020-12-18 | 西安工程大学 | Full-bridge inverter circuit grid driving circuit with midpoint voltage tracking function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123410A (en) * | 2006-08-10 | 2008-02-13 | 罗姆股份有限公司 | Load driving device and electrical apparatus using the same |
| CN101576745A (en) * | 2009-06-09 | 2009-11-11 | 北京航空航天大学 | Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve |
| CN102882510A (en) * | 2011-07-13 | 2013-01-16 | 英飞凌科技奥地利有限公司 | Drive circuit with adjustable dead time |
-
2014
- 2014-12-01 CN CN201410719907.3A patent/CN104506115B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123410A (en) * | 2006-08-10 | 2008-02-13 | 罗姆股份有限公司 | Load driving device and electrical apparatus using the same |
| CN101576745A (en) * | 2009-06-09 | 2009-11-11 | 北京航空航天大学 | Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve |
| CN102882510A (en) * | 2011-07-13 | 2013-01-16 | 英飞凌科技奥地利有限公司 | Drive circuit with adjustable dead time |
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| CN104506115A (en) | 2015-04-08 |
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Granted publication date: 20170912 Termination date: 20201201 |