CN109525209A - A kind of power amplifier for minitype two-axle theodolite - Google Patents
A kind of power amplifier for minitype two-axle theodolite Download PDFInfo
- Publication number
- CN109525209A CN109525209A CN201811259629.2A CN201811259629A CN109525209A CN 109525209 A CN109525209 A CN 109525209A CN 201811259629 A CN201811259629 A CN 201811259629A CN 109525209 A CN109525209 A CN 109525209A
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- diode
- foot
- msk4201
- chip
- theodolite
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of power amplifiers for minitype two-axle theodolite, it includes MSK4201 chip U1, the 3rd foot of the MSK4201 chip U1 connects power end VCC, and the 3rd foot of the MSK4201 chip U1 is grounded by ceramic condenser C3 parallel with one another and electrolytic capacitor C4, the 1st foot of the MSK4201 chip U1 is connected to motor power supply end V+, and the 1st foot of the MSK4201 chip U1 is grounded by ceramic condenser C1 parallel with one another and electrolytic capacitor C2, two output ends of the 2nd foot and the 7th foot of the MSK4201 chip U1 as the power amplifier, and the resistance R3 and capacitor C5 being sequentially connected in series are connected between the 2nd foot and the 7th foot of the MSK4201 chip U1.The present invention can reduce system interference, the complexity that level of integrated system can be improved, can reduce system design, reduce the design difficulty of servo-system and reduce cost.
Description
Technical field
The present invention relates to minitype two-axle theodolite more particularly to a kind of power amplifiers for minitype two-axle theodolite.
Background technique
Power amplifier is the important component of Servo system of theodolite, and the azimuth pitch spindle motor of theodolite is by function
Rate amplifier driving rotation, the power amplifier used in equipment at present is all uniaxial power amplifier, internal to use IPM mould
Block design, therefore volume is bigger, and can cause very big noise during being turned off and on of IGBT, so will affect it
Its electronic equipment drives according to 4 road PWM, then needs to carry out the timing Designs such as dead zone, phase, although can guarantee power amplification
Device works normally, but increases design difficulty.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the deficiencies of the prior art, provide one kind can reduce system interference,
Level of integrated system, the complexity that system design can be reduced, the design difficulty for reducing servo-system can be improved and reduce cost
The power amplifier for minitype two-axle theodolite.
In order to solve the above technical problems, the present invention adopts the following technical scheme that.
A kind of power amplifier for minitype two-axle theodolite comprising have MSK4201 chip U1, the MSK4201
The 3rd foot of chip U1 connects power end VCC, and the 3rd foot of the MSK4201 chip U1 passes through ceramic condenser C3 parallel with one another
It is grounded with electrolytic capacitor C4, the 1st foot of the MSK4201 chip U1 is connected to motor power supply end V+, and the MSK4201
The 1st foot of chip U1 is grounded by ceramic condenser C1 parallel with one another and electrolytic capacitor C2, and the 2nd of the MSK4201 chip U1 the
Two output ends of foot and the 7th foot as the power amplifier, and connect between the 2nd foot and the 7th foot of the MSK4201 chip U1
It is connected to the resistance R3 and capacitor C5 being sequentially connected in series.
Preferably, in another embodiment provided by the present application, the above-mentioned power amplifier for minitype two-axle theodolite,
It include diode D1, diode D2, diode D3 and diode D4, the cathode of the diode D1 is connected to motor power supply electricity
Source V+, the anode of the diode D1 and the cathode of diode D2 are all connected to the 7th foot of the MSK4201 chip U1, institute
The plus earth of diode D2 is stated, the cathode of the diode D3 is connected to motor power supply end V+, the diode D3's
The cathode of anode and diode D4 are all connected to the 2nd foot of the MSK4201 chip U1, the plus earth of the diode D4.
Preferably, in another embodiment provided by the present application, diode D1 described above, diode D2, diode D3
Model with diode D4 is UF4007.
Preferably, in another embodiment provided by the present application, the above-mentioned power amplifier for minitype two-axle theodolite,
It include voltage transient overvoltage protection diode D5, the plus earth of the voltage transient overvoltage protection diode D5, the electricity
The cathode of pressure transient overvoltage protection diode D5 is connected to the 1st foot of the MSK4201 chip U1.
Preferably, the model P6KE of voltage transient overvoltage protection diode D5 described above.
Preferably, in another embodiment provided by the present application, the above-mentioned power amplifier for minitype two-axle theodolite,
It include zener diode D6 and zener diode D7, the cathode of the zener diode D6 is connected to the MSK4201 chip
The cathode of the 4th foot of U1, the plus earth of the zener diode D6, the zener diode D7 is connected to the MSK4201
The 6th foot of chip U1, the plus earth of the zener diode D7.
Preferably, in another embodiment provided by the present application, the type of above-mentioned zener diode D6 and zener diode D7
It number is 1N4740.
Preferably, in another embodiment provided by the present application, the device parameters of above-mentioned resistance R3 are 100ohm/2W, institute
Stating capacitor C5 is 1nf capacitor.
Preferably, in another embodiment provided by the present application, above-mentioned ceramic condenser C3 is 1uF capacitor, the electrolysis electricity
Appearance C4 is 22uF capacitor.
Preferably, in another embodiment provided by the present application, above-mentioned ceramic condenser C1 is the Surface Mount electricity that capacitance is 6.8uF
Hold.
In power amplifier disclosed by the invention for minitype two-axle theodolite, MSK4201 driving chip is used, it should
Chip is a pwm power amplifier, supply voltage maximum 75V, output continuous stream maximum 5A, digital input signals control,
With enabled control function, encapsulates using To-3,8 pin metal airproofs, and has been internally integrated H-bridge circuit in MSK4201,
Without in addition designing, furthermore the present invention adds enable end to drive using single channel PWM, greatly reduces the difficulty of servo-system, improves
Level of integrated system, reduces the design difficulty of servo-system and saves cost the complexity for reducing system design.
In addition, invention increases filter capacitor eliminations, so that switch interference be inhibited to substantially increase the performance of power amplifier, cause
Present invention is suitably applied in minitype two-axle theodolite, and with good application prospect.
Detailed description of the invention
Fig. 1 is the circuit diagram of power amplifier of the present invention.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawings and examples.
The invention discloses a kind of power amplifiers for minitype two-axle theodolite, please refer to Fig. 1 comprising have
The 3rd foot of MSK4201 chip U1, the MSK4201 chip U1 connect power end VCC, and the 3rd of the MSK4201 chip U1
Foot is grounded by ceramic condenser C3 parallel with one another and electrolytic capacitor C4, and the 1st foot of the MSK4201 chip U1 is connected to motor
Power supply end V+, and the 1st foot of the MSK4201 chip U1 is connect by ceramic condenser C1 and electrolytic capacitor C2 parallel with one another
Ground, two output ends of the 2nd foot and the 7th foot of the MSK4201 chip U1 as the power amplifier, and the MSK4201
The resistance R3 and capacitor C5 being sequentially connected in series are connected between the 2nd foot of chip U1 and the 7th foot.
In above-mentioned power amplifier, MSK4201 driving chip is used, which is a pwm power amplifier, power supply
Voltage maximum 75V, output continuous stream maximum 5A, digital input signals control have enabled control function, using To-3,8 pipes
The encapsulation of foot metal airproof, and it has been internally integrated H-bridge circuit in MSK4201, without in addition design, furthermore the present invention is using single
Road PWM adds enable end to drive, and greatly reduces the difficulty of servo-system, improves level of integrated system, reduces system design
Complexity, the design difficulty for reducing servo-system and save cost.In addition, invention increases filter capacitors to disappear
It removes, so that switch interference be inhibited to substantially increase the performance of power amplifier, causes that present invention is suitably applied to minitype two-axle warps
In latitude instrument, and with good application prospect.
The present embodiment includes diode D1, diode D2, diode D3 and diode D4 as a preferred method,
The cathode of the diode D1 is connected to motor power supply end V+, and the anode of the diode D1 and the cathode of diode D2 are equal
It is connected to the 7th foot of the MSK4201 chip U1, the plus earth of the diode D2, the cathode connection of the diode D3
In motor power supply end V+, the anode of the diode D3 and the cathode of diode D4 are all connected to the MSK4201 chip
The 2nd foot of U1, the plus earth of the diode D4.
Further, the model of the diode D1, diode D2, diode D3 and diode D4 are UF4007.On
It states in each diode, works as backward voltage>2 times V+, reverse recovery time<100nS.
The present embodiment further includes having voltage transient overvoltage protection diode D5, the voltage transient overvoltage protection diode D5
Plus earth, the cathode of the voltage transient overvoltage protection diode D5 is connected to the 1st foot of the MSK4201 chip U1.
Wherein, the model P6KE of the voltage transient overvoltage protection diode D5.Its pressure stabilizing value is to be less than 75V greater than supply voltage.
The present embodiment further includes having the connection of the cathode of zener diode D6 and zener diode D7, the zener diode D6
In the 4th foot of the MSK4201 chip U1, the plus earth of the zener diode D6, the cathode of the zener diode D7
It is connected to the 6th foot of the MSK4201 chip U1, the plus earth of the zener diode D7.Wherein, the zener diode
The model of D6 and zener diode D7 are 1N4740.The zener diode D6 and zener diode D7 mainly for the protection of
Input and disable pin does not occur over-voltage and back-pressure situation.
About parts selection, in the present embodiment, the device parameters of the resistance R3 are 100ohm/2W, and the capacitor C5 is
1nf capacitor.The ceramic condenser C3 is 1uF capacitor, and the electrolytic capacitor C4 is 22uF capacitor.The ceramic condenser C1 is capacitance
For the Surface Mount capacitor of 6.8uF.
In practical application, in order to eliminate switch disturbance-proof design during PCB fabric swatch, it can pass through during PCB fabric swatch
The mode of reasonable cabling reduces switching noise, and the design key in fabric swatch is, enable V+, Aout, Bout, Power Groud it is high-power
Wiring does not intersect with weak electric signal wiring, and distance cannot be excessively close, and otherwise, the interference signal in high-power wiring can pass through cabling
Between parasitic capacitance be coupled to weak electric signal wiring on；Moreover, Power Groud and signal ground cloth are ground level, separately it is routed and cannot weighs
It closes；In addition, Power Groud and signal ground single-point grounding, high-power wiring is wide as far as possible, because wiring is wider, parasitic inductance is just small, does
It disturbs just about small；Spacing is small as far as possible between V+, Aout, Bout and Power Groud these high-power wirings, and magnetic field can cancel out each other.
Embodiment adds filter capacitors to eliminate switch disturbance-proof design, selects suitable filter capacitor that can effectively inhibit out
It closes interference: using filter capacitor in V+ (motor power supply) and Vcc (logic power supply)；V+ pin uses two kinds of electricity over the ground
Capacitor filter.One is ceramic condenser C1, and for filtering out High-frequency Interference, using capacitance 6.8uF Surface Mount capacitor, which must be close to
Device V+ pin.Another kind is tantalum or alminium electrolytic condenser C2, for filtering out low-frequency disturbance.Using capacitance for 10uF/A, (motor is most
High current), if motor maximum current is 20A, the capacitance of 200uF or more is at least selected, current of electric is about 8A in the design,
For there are surpluses, 100uF tantalum capacitor is used.The capacitor is as close possible to V+ pin.Vcc pin also uses two kinds of capacitors over the ground
Filtering is realized using 1uF ceramic condenser C3 and 22uF electrolytic capacitor (C4) and is filtered.
The present invention reduces disturbance-proof design using output filter: firstly, using LC filter circuit in amplifier output, can drop
Low noise；Uptake pathway, i.e. 100ohm/2W resistance R3 and 1nf capacitor C5 are used between Aout and Bout simultaneously, to absorb
Switching noise spike；Secondly, being total to place in Power Groud and signal ground uses magnetic bead, it, can because magnetic bead has the characteristics that hinder high frequency
Reduce crosstalk；In addition, add HCPL0710 optical coupling isolation circuit in module input signal front end, will control the ground of signal and module every
It leaves, the power supply of MSK4201 is isolated using isolation voltage module.
Power amplifier disclosed by the invention for minitype two-axle theodolite, is integrated with two on a plank
MSK4201 chip, plank can drive two axis in theodolite orientation and pitching simultaneously, compare having a size of 120mmX70mmX10mm
The uniaxial power stage (size 294mm × 200mm × 90mm) used in the past for, space is greatly saved, for some small-sized
For theodolite, power amplifier can be placed directly on turntable, reduce the track lengths of high-power cable, at the same at
Originally 70% or more is reduced, in addition, considering a variety of designs for eliminating switch interference in design, greatly reduces power amplification
Interference of the device to other electronics equipments, has better meet application demand.
The above is preferred embodiments of the present invention, is not intended to restrict the invention, all in technology model of the invention
Interior done modification, equivalent replacement or improvement etc. are enclosed, should be included in the range of of the invention protect.
Claims (10)
1. a kind of power amplifier for minitype two-axle theodolite, which is characterized in that it include MSK4201 chip U1, it is described
The 3rd foot of MSK4201 chip U1 connects power end VCC, and the 3rd foot of the MSK4201 chip U1 passes through pottery parallel with one another
Porcelain capacitor C3 and electrolytic capacitor C4 ground connection, the 1st foot of the MSK4201 chip U1 are connected to motor power supply end V+, and institute
The 1st foot for stating MSK4201 chip U1 is grounded by ceramic condenser C1 parallel with one another and electrolytic capacitor C2, the MSK4201 core
Two output ends of the 2nd foot of piece U1 and the 7th foot as the power amplifier, and the 2nd foot of the MSK4201 chip U1 and
The resistance R3 and capacitor C5 being sequentially connected in series are connected between 7 feet.
2. being used for the power amplifier of minitype two-axle theodolite as described in claim 1, which is characterized in that include diode
D1, diode D2, diode D3 and diode D4, the cathode of the diode D1 is connected to motor power supply end V+, described
The anode of diode D1 and the cathode of diode D2 are all connected to the 7th foot of the MSK4201 chip U1, the diode D2's
Plus earth, the cathode of the diode D3 are connected to motor power supply end V+, the anode and diode of the diode D3
The cathode of D4 is all connected to the 2nd foot of the MSK4201 chip U1, the plus earth of the diode D4.
3. being used for the power amplifier of minitype two-axle theodolite as claimed in claim 2, which is characterized in that the diode
D1, diode D2, diode D3 and diode D4 model be UF4007.
4. being used for the power amplifier of minitype two-axle theodolite as described in claim 1, which is characterized in that include voltage wink
State overvoltage protection diode D5, the plus earth of the voltage transient overvoltage protection diode D5, the voltage transient over-voltage are protected
The cathode of shield diode D5 is connected to the 1st foot of the MSK4201 chip U1.
5. being used for the power amplifier of minitype two-axle theodolite as claimed in claim 4, which is characterized in that the voltage transient
The model P6KE of overvoltage protection diode D5.
6. being used for the power amplifier of minitype two-axle theodolite as described in claim 1, which is characterized in that include pressure stabilizing two
Pole pipe D6 and zener diode D7, the cathode of the zener diode D6 are connected to the 4th foot of the MSK4201 chip U1, institute
The plus earth of zener diode D6 is stated, the cathode of the zener diode D7 is connected to the 6th of the MSK4201 chip U1
Foot, the plus earth of the zener diode D7.
7. being used for the power amplifier of minitype two-axle theodolite as claimed in claim 6, which is characterized in that two pole of pressure stabilizing
The model of pipe D6 and zener diode D7 are 1N4740.
8. being used for the power amplifier of minitype two-axle theodolite as described in claim 1, which is characterized in that the resistance R3's
Device parameters are 100ohm/2W, and the capacitor C5 is 1nf capacitor.
9. being used for the power amplifier of minitype two-axle theodolite as described in claim 1, which is characterized in that the ceramic condenser
C3 is 1uF capacitor, and the electrolytic capacitor C4 is 22uF capacitor.
10. being used for the power amplifier of minitype two-axle theodolite as described in claim 1, which is characterized in that the ceramic electrical
Holding C1 is the Surface Mount capacitor that capacitance is 6.8uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811259629.2A CN109525209A (en) | 2018-10-26 | 2018-10-26 | A kind of power amplifier for minitype two-axle theodolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811259629.2A CN109525209A (en) | 2018-10-26 | 2018-10-26 | A kind of power amplifier for minitype two-axle theodolite |
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| Publication Number | Publication Date |
|---|---|
| CN109525209A true CN109525209A (en) | 2019-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811259629.2A Pending CN109525209A (en) | 2018-10-26 | 2018-10-26 | A kind of power amplifier for minitype two-axle theodolite |
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|---|---|
| CN (1) | CN109525209A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205785171U (en) * | 2016-06-14 | 2016-12-07 | 西安中科光电精密工程有限公司 | A kind of active theodolite system |
| CN205846688U (en) * | 2016-06-28 | 2016-12-28 | 华通机电股份有限公司 | Small-sized electric leakage overvoltage/undervoltage protection control circuit |
| CN206545724U (en) * | 2016-12-30 | 2017-10-10 | 金卡智能集团股份有限公司 | A kind of flow instrument valve controling circuit |
| CN207117475U (en) * | 2017-08-16 | 2018-03-16 | 德阳弘益智电科技有限公司 | A kind of power circuit of intelligent electric brake |
-
2018
- 2018-10-26 CN CN201811259629.2A patent/CN109525209A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205785171U (en) * | 2016-06-14 | 2016-12-07 | 西安中科光电精密工程有限公司 | A kind of active theodolite system |
| CN205846688U (en) * | 2016-06-28 | 2016-12-28 | 华通机电股份有限公司 | Small-sized electric leakage overvoltage/undervoltage protection control circuit |
| CN206545724U (en) * | 2016-12-30 | 2017-10-10 | 金卡智能集团股份有限公司 | A kind of flow instrument valve controling circuit |
| CN207117475U (en) * | 2017-08-16 | 2018-03-16 | 德阳弘益智电科技有限公司 | A kind of power circuit of intelligent electric brake |
Non-Patent Citations (1)
| Title |
|---|
| 吴凡: "基于DSP的光轴稳定平台控制系统研究", 《中国优秀硕士学位论文全文数据库》 * |
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Application publication date: 20190326 |