CN104052351B - Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit - Google Patents
Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit Download PDFInfo
- Publication number
- CN104052351B CN104052351B CN201310104434.1A CN201310104434A CN104052351B CN 104052351 B CN104052351 B CN 104052351B CN 201310104434 A CN201310104434 A CN 201310104434A CN 104052351 B CN104052351 B CN 104052351B
- Authority
- CN
- China
- Prior art keywords
- input
- resistance
- machine tool
- control machine
- digit control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004804 winding Methods 0.000 claims abstract description 21
- 230000005669 field effect Effects 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000002955 isolation Methods 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 9
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 claims description 7
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 238000004020 luminiscence type Methods 0.000 claims description 3
- 241001056186 Syngrapha altera Species 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000036772 blood pressure Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Landscapes
- Control Of Stepping Motors (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit relates to non-resistance provides constant current to the stepper motor driver circuit field of motor winding.Line cutting Digit Control Machine Tool main frame input pulse signal inputs master chip after the blood pressure lowering of electrical level transferring chip A road, pulse signal after pulsewidth modulation is input to 3 feet of feed back input photoelectrical coupler IC1 by master chip, after amplified isolation, it is added to field effect transistor T1 base stage through input build-out resistor R7 by 6 feet, after electric current flows through motor A phase winding XA, field effect transistor T1 and current sampling resistor R5, after making switch triode Q1 conducting, then through feedback output photoelectric bonder IC2, feedback pulse signal is exported the corresponding input pin of master chip.Originally little without series resistance and outputting current steadily, energy consumption in the motor winding of digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, circuit structure is simple, economic.
Description
Technical field
The present invention digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit relates at motor
Winding is not in series with the Digit Control Machine Tool stepper motor driver circuit field providing constant current of resistance.
Background technology
In the stepper motor driver winding of Digit Control Machine Tool, all it was in series with resistance, in order to mains fluctuations in the past
The big electric current of rear generation carries out current limliting, and after being in series with resistance in the windings, the driving frequency of main frame can only be less than equal to 512 hertz
Hereby, then the planker speed of service is slow, and resistance itself to consume energy, therefore should develop digital non-resistance constant current Digit Control Machine Tool stepping electricity
Drive circuit.
Summary of the invention
It is an object of the invention to provide a kind of digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device electricity
Road, it is provided that constant current is for driving the single-phase winding of line cutting Digit Control Machine Tool motor.
Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is mainly luminous by input signal
Diode D1, input signal light emitting diode current limiting safeguard resistor R2, electrical level transferring chip A road U1A, master chip, input power
Current-limiting resistance R1, feed back input photoelectrical coupler IC1, decoupling capacitor C1, input build-out resistor R7, feedback signal light emitting diode
D2, current limiting safeguard resistor R6, field effect transistor T1, current sampling resistor R5, switch triode Q1, motor A phase winding XA, fast
Quick-recovery diode D3, biasing current-limiting resistance R4, feedback output photoelectric bonder IC2, feedback output pull-up resistor R3 composition, come
From the input pulse signal of main frame through electrical level transferring chip A road U1A and input signal light emitting diode D1 positive interpolar node A, defeated
Enter to electrical level transferring chip A road U1A input pin 3 foot, input signal light emitting diode D1 negative pole and input signal light emitting diode
Current limiting safeguard resistor R2 one end is connected, and the input signal light emitting diode current limiting safeguard resistor R2 other end is connected to the first ground connection
End GND1；Electrical level transferring chip A road U1A output pin 2 foot is connected to master chip correspondence signal input pin；The corresponding output pin of master chip
Being connected to feed back input photoelectrical coupler IC1 input pin 3 foot ,+5 volt DC sources are connected to instead through input power current-limiting resistance R1
Power supply input pin 2 foot of feedback input optocoupler IC1, feed back input photoelectrical coupler IC1 grounding leg 5 foot and the second earth terminal
GND2, decoupling capacitor C1 one end are connected to node F ,+12 volt DC sources and the decoupling capacitor C1 other end, feed back input light thermocouple
Clutch IC1 power supply input pin 8 foot is connected to node C, and feed back input photoelectrical coupler IC1 output pin 6 foot is through input build-out resistor
R7 and field effect transistor T1 base stage, feedback signal light emitting diode D2 positive pole are connected to node G；Feedback signal light emitting diode D2 bears
Pole is connected with current limiting safeguard resistor R6 one end of feedback signal light emitting diode D2, the current limiting safeguard resistor R6 other end, electric current
The sampling resistor R5 other end, switch triode Q1 emitter stage and the second earth terminal GND2 are commonly connected to node E；Current sample electricity
Resistance R5 one end, switch triode Q1 base stage are connected to node S with field effect transistor T1 source electrode three；The drain electrode of field effect transistor T1, stepping
Motor A phase winding XA one end and fast recovery diode D3 positive pole be commonly connected to node D, motor A phase winding XA another
End, fast recovery diode D3 negative pole, biasing current-limiting resistance R4 one end and+12 volt DC sources are commonly connected to node H；Biasing
The current-limiting resistance R4 other end is connected with the light emitting diode positive pole in feedback output photoelectric bonder IC2, switch triode Q1
Colelctor electrode with feedback output photoelectric bonder IC2 in light emitting diode negative pole be connected, feedback output photoelectric bonder IC2 in three
Node B between pole pipe collector and feedback output pull-up resistor R3 one end is connected to master chip correspondence feedback signal input pin,
The feedback output pull-up resistor R3 other end is connected with+5 volt DC sources, and in feedback output photoelectric bonder IC2, audion is sent out
Emitter-base bandgap grading is connected to the first earth terminal GND1.
The design principle of the present invention digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit and
Structure is further described below:
Input pulse signal amplitude from line cutting Digit Control Machine Tool main frame is 12 volts, therefore need to be through level conversion
The chip A road U1A range of decrease, to being just input to the master chip respective input of 5 volts after 5 volts, makes master chip normally work；For
Monitoring, from the input pulse signal of main frame, need to install input signal light emitting diode additional in input pulse signal circuit, for
Protection input signal light emitting diode, then input signal light emitting diode also needs the input signal light-emitting diodes being concatenated connecting
It is connected with the first earth terminal again after pipe current limiting safeguard resistor current limliting.
In master chip by programming the input signal after the main frame range of decrease is carried out pulsewidth modulation, its modulating frequency more than or
Equal to 15 kilo hertzs, 66 microsecond pulse width signals are made to be modulated in the less pulse width signal current range of 25 microseconds to 66 microseconds,
Thus, motor winding can obtain stable output electric current, and do not affected, the most just by extraneous direct current power source voltage
Need not be in series with resistance in the winding of motor, become that non-resistance constant-current contour cutting off machine motor is single-phase to be driven
Dynamic device circuit.
The effect of feed back input photoelectrical coupler IC1 is to be kept apart by the second earth terminal GND2 and the first earth terminal GND1,
Meanwhile, also the input pulse that amplitude is 5 volts of 3 feet being input to feed back input photoelectrical coupler IC1 from master chip is believed
Number voltage, is enlarged into the isolation and amplifier pulse signal voltage that amplitude is 12 volts, then the output by feed back input photoelectrical coupler IC1
Foot 6 foot is added to the grid of field effect transistor T1 through input build-out resistor R7 of field effect transistor T1, and input build-out resistor R7 is imitated with field
Should match by pipe T1 input impedance, the input pulse signal being added on field effect transistor T1 grid can be by feedback signal light emitting diode
D2 is indicated by flashing, and the current limiting safeguard resistor R6 being in series with feedback signal light emitting diode D2 is to feedback
Signal light emitting diode D2 is used as current-limiting protection.Flow through voltage produced by the electric current on power supply sampling resistor R5 for switch
Audion Q1 base stage applies turn-on bias voltage, after switch triode Q1 conducting, then sends out feedback output photoelectric bonder IC2
Optical diode provides conducting glow current, makes the triode ON in feedback output photoelectric bonder IC2, through feedback output pull-up
Resistance R3 provides feedback loop output signal to master chip, after master chip receives feedback loop output signal, then to feed back input light thermocouple
Clutch IC1 sends the feed back input pulse signal after second modulation.
When motor A phase winding XA in the series circuit that field effect transistor T1 and current sampling resistor R5 form at+5 volts
Under direct current power source voltage after conducting, then the stepper motor output shaft by rotating drives wire cutting machine tool planker to run；It is connected in parallel on
The effect of the fast recovery diode D3 at motor A phase winding XA two ends is to eliminate the reverse sense in motor A phase winding
Answer electromotive force, to protect field effect transistor T1 normally to work.
The method have the advantages that and save the resistance being connected in motor winding circuit, and make the electricity in motor winding
Stream is constant current, then reduce energy consumption, make driver circuit structure simplify, economic, stable, by the light of feedback
Electric coupler, can keep apart the first earth terminal GND1 and the second earth terminal GND2, it is ensured that motor even running.
Accompanying drawing explanation
The Figure of description of the present invention is digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit
Electrical schematic diagram.For three-phase stepper motor, remaining two-phase-region casting device circuit and this singlephase drive complete phase of device circuit structure
With.
Detailed description of the invention
See the electrical schematic diagram of the present invention digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, come
Being 12 volts from the input pulse signal amplitude of line cutting Digit Control Machine Tool main frame, input pulse signal frequency range is:
0-1024 is conspicuous, according to the thickness of workpiece to be machined, and can be by controlling software automatic control and adjustment input pulse signal frequency.
Input signal light emitting diode D1 negative pole is connected with input signal light emitting diode current limiting safeguard resistor R2 one end,
The other end and the first earth terminal GND1 of input signal light emitting diode current limiting safeguard resistor R2 are connected, input signal luminescence two
The resistance value of pole pipe current limiting safeguard resistor R2 is 2.7 kilo-ohms.
Electrical level transferring chip A road U1A model is CT4050, makes input pulse signal amplitude be transformed into 5 volts by 12 volts,
Voltage needs with applicable master chip.
What master chip used the EPM7064SLC44-10 model in the MAX7000S family chip of U.S. ALTERA company can
Programmed logic controls device chip, modulating frequency >=15 kilo hertz modulated input pulse signal in master chip, makes input arteries and veins
The pulse width rushing signal is modulated to 25 microseconds to 66 microsecond range from 66 microseconds.
Feed back input photoelectrical coupler IC1 model is TLP251, has 8 wiring pins, and wherein 1 foot, 4 feet and 7 feet are
Untapped empty foot, 2 feet are connected to+5 volt DC sources by input power current-limiting resistance R1, and input power current-limiting resistance R1 rises
Metering function；3 feet receive the feedback pulse input signal after pulse width modulation from master chip, through feed back input light
After electric coupler IC1 zooms into the isolation and amplifier pulse signal voltage that amplitude is 12 volts, by 6 foot outputs, through input build-out resistor
R7 is added to the screen of field effect transistor T1；Decoupling capacitor C1 one end and grounding leg 5 foot, the second earth terminal GND2 are connected to node F,
The decoupling capacitor C1 other end and power supply input pin 8 foot ,+12 volt DC sources are connected to node C, and decoupling capacitor C1 capacitance is
0.1 microfarad.Node C and node H is all connected to+12 volt DC sources.
It it is 51 ohm with the input build-out resistor R7 resistance value of field effect transistor T1 input impedance matching.
Field effect transistor T1 model is P60NF06 type produced in USA, its maximum operating currenbt ID=60 amperes, drain-source
Running voltage VDS=60 volts.
Switch triode Q1 is NPN type, its switching frequency >=150 megahertz.
Motor is reflection formula motor, and XA is the A phase winding of motor.
Fast recovery diode D3 is recovery time: 20 nanoseconds, use RHRP640 model produced in USA.
Light emitting diode in feedback output photoelectric bonder IC2 is biased the biasing current-limiting resistance R4 resistance value of current limliting
It it is 4.7 kilo-ohms.
Feedback output photoelectric bonder IC2 model is P181.
Feedback output pull-up resistor R3 resistance value is 2.7 kilo-ohms.
Claims (10)
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is mainly by input signal luminescence two Pole pipe D1, input signal light emitting diode current limiting safeguard resistor R2, electrical level transferring chip A road U1A, master chip, input power limit Leakage resistance R1, feed back input photoelectrical coupler IC1, decoupling capacitor C1, input build-out resistor R7, feedback signal light emitting diode D2, current limiting safeguard resistor R6, field effect transistor T1, current sampling resistor R5, switch triode Q1, motor A phase winding XA, fast Quick-recovery diode D3, biasing current-limiting resistance R4, feedback output photoelectric bonder IC2, feedback output pull-up resistor R3 composition, its It is characterised by that the input pulse signal from main frame is through electrical level transferring chip A road U1A and input signal light emitting diode D1 positive pole Between node A, be input to electrical level transferring chip A road U1A input pin 3 foot, input signal light emitting diode D1 negative pole and input signal Light emitting diode current limiting safeguard resistor R2 one end is connected, and the input signal light emitting diode current limiting safeguard resistor R2 other end connects To the first earth terminal GND1；Electrical level transferring chip A road U1A output pin 2 foot is connected to master chip correspondence signal input pin；Master chip The output pin sending the feedback pulse signal after pulse width modulation is connected to feed back input photoelectrical coupler IC1 input pin 3 feet ,+5 volt DC sources are connected to the power supply input pin 2 of feed back input photoelectrical coupler IC1 through input power current-limiting resistance R1 Foot, feed back input photoelectrical coupler IC1 grounding leg 5 foot and the second earth terminal GND2, decoupling capacitor C1 one end are connected to node F ,+ 12 volts of DC sources are connected to node C with the decoupling capacitor C1 other end, feed back input photoelectrical coupler IC1 power supply input pin 8 foot, Feed back input photoelectrical coupler IC1 output pin 6 foot is through input build-out resistor R7 and field effect transistor T1 base stage, feedback signal luminescence two Pole pipe D2 positive pole is connected to node G；The current limliting of feedback signal light emitting diode D2 negative pole and feedback signal light emitting diode D2 is protected Protecting resistance R6 one end to be connected, the current limiting safeguard resistor R6 other end, the current sampling resistor R5 other end, switch triode Q1 launch Pole and the second earth terminal GND2 are commonly connected to node E；Current sampling resistor R5 one end, switch triode Q1 base stage and field effect Pipe T1 source electrode three is connected to node S；The drain electrode of field effect transistor T1, motor A phase winding XA one end and fast recovery diode D3 positive pole is commonly connected to node D, the motor A phase winding XA other end, fast recovery diode D3 negative pole, biasing current limliting electricity Resistance R4 one end and+12 volt DC sources are commonly connected to node H；The biasing current-limiting resistance R4 other end couples with feedback output photoelectric Light emitting diode positive pole in device IC2 is connected, and switch triode Q1 colelctor electrode is luminous with feedback output photoelectric bonder IC2 Diode cathode is connected, transistor collector and feedback output pull-up resistor R3 one end in feedback output photoelectric bonder IC2 Between node B be connected to master chip correspondence feedback signal input pin, the feedback output pull-up resistor R3 other end and+5 volt direct currents Power supply is connected, and in feedback output photoelectric bonder IC2, transistor emitter is connected to the first earth terminal GND1.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be that the input pulse signal amplitude from line cutting Digit Control Machine Tool main frame is 12 volts, input pulse signal frequency Scope is: 0-1024 is conspicuous.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be that input signal light emitting diode current limiting safeguard resistor R2 resistance value is 2.7 kilohms.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be that electrical level transferring chip A road U1A model is CT4050, make input pulse signal amplitude be transformed into 5 volts by 12 volts.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be compiling of EPM7064SLC44-10 model that master chip uses in the MAX7000S family chip of U.S. ALTERA company Journey logic control device chip, modulating frequency >=15 kilo hertz to the modulation of input pulse signal, make the pulse of input pulse signal Width is modulated to 25 microseconds to 66 microsecond range from 66 microseconds.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levying and be that feed back input photoelectrical coupler IC1 model is TLP251, have 8 wiring pins, wherein 1 foot, 4 feet and 7 feet are not The empty foot used, 2 feet are connected to+5 volt DC sources by input power current-limiting resistance R1, and 3 feet receive the warp from master chip Feedback pulse input signal after extra pulse width modulated, then to zoom into amplitude through feed back input photoelectrical coupler IC1 be 12 volts After special isolation and amplifier pulse signal voltage, by 6 foot outputs, it is added to field effect transistor T1 grid through input build-out resistor R7；Decoupling Electric capacity C1 capacitance is 0.1 microfarad.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be that inputting build-out resistor R7 resistance value is 51 ohm.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be that field effect transistor T1 model is P60NF06 type produced in USA, its maximum operating currenbt ID=60 ampere, drain-source work Make voltage VDS=60 volt.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levy and be that switch triode Q1 is NPN type, its switching frequency >=150 megahertz.
- The most digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit, it is special Levying and be that fast recovery diode D3 is RHRP640 model produced in USA, recovery time is: 20 nanoseconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310104434.1A CN104052351B (en) | 2013-03-16 | 2013-03-16 | Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310104434.1A CN104052351B (en) | 2013-03-16 | 2013-03-16 | Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104052351A CN104052351A (en) | 2014-09-17 |
| CN104052351B true CN104052351B (en) | 2016-12-28 |
Family
ID=51504813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310104434.1A Active CN104052351B (en) | 2013-03-16 | 2013-03-16 | Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052351B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374569A (en) * | 2016-09-29 | 2017-02-01 | 深圳天珑无线科技有限公司 | Charging circuit, electronic equipment and charging method |
| CN106466507B (en) * | 2016-10-13 | 2023-09-08 | 上海健康医学院 | Isolated program-controlled electric stimulator |
| CN113364355B (en) * | 2021-06-17 | 2022-10-28 | 上海御微半导体技术有限公司 | Motor drive conversion device and three-phase brushless motor equipment |
| CN114285314B (en) * | 2021-12-30 | 2023-09-12 | 吉林大学 | High-stability pulse current source based on single chip microcomputer control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030437A2 (en) * | 1999-02-16 | 2000-08-23 | Lexmark International, Inc. | Method and apparatus for controlling a servo motor using a stepper motor controller integrated circuit |
| CN1833353A (en) * | 2003-09-05 | 2006-09-13 | 电子影剧院控制公司 | Circuit for driving a stepper motor and method of controlling a stepper motor driver |
| CN1898857A (en) * | 2003-12-26 | 2007-01-17 | 罗姆股份有限公司 | Overcurrent protection circuit, motor drive circuit, and semiconductor device |
-
2013
- 2013-03-16 CN CN201310104434.1A patent/CN104052351B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030437A2 (en) * | 1999-02-16 | 2000-08-23 | Lexmark International, Inc. | Method and apparatus for controlling a servo motor using a stepper motor controller integrated circuit |
| CN1264214A (en) * | 1999-02-16 | 2000-08-23 | 莱克斯马克国际公司 | Method and equipment for control actuating motor with integral cirucit of motor controller |
| CN1833353A (en) * | 2003-09-05 | 2006-09-13 | 电子影剧院控制公司 | Circuit for driving a stepper motor and method of controlling a stepper motor driver |
| CN1898857A (en) * | 2003-12-26 | 2007-01-17 | 罗姆股份有限公司 | Overcurrent protection circuit, motor drive circuit, and semiconductor device |
Non-Patent Citations (1)
| Title |
|---|
| 基于CPLD的可控步进电机脉冲分配器设计;吴亮红等;《控制工程》;20050131;第12卷(第1期);第94-96页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104052351A (en) | 2014-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104052351B (en) | Digital non-resistance constant current Digit Control Machine Tool motor singlephase drive device circuit | |
| CN103784099B (en) | Zero cross detection circuit and dish-washing machine | |
| CN102833917B (en) | LED constant-current control circuit and LED liquid crystal television | |
| CN108173425A (en) | A kind of start-up circuit | |
| CN105790554A (en) | IGBT circuit having dual-isolation characteristic and control method thereof | |
| CN101860021A (en) | Circuit for preventing reverse connection of power supply and lamp | |
| CN203554270U (en) | MOSFET drive circuit | |
| CN201699683U (en) | Photoelectrical coupling circuit for improving data transfer rate | |
| CN203632222U (en) | Output short circuit protection circuit of flyback converter | |
| CN102801287B (en) | A kind of power device drives pressure limiting circuit | |
| KR880005768A (en) | Data shaping circuit | |
| CN103457464A (en) | Current limiting circuit on basis of switching power supplies | |
| CN101262220A (en) | Optical coupling acceleration circuit | |
| CN209462292U (en) | A kind of binary channels motor driver | |
| CN207021660U (en) | Electrical source input overvoltage protection and output overvoltage protection circuit | |
| CN106100433A (en) | A kind of pulse power supply circuit being applicable to more modulation pattern | |
| CN203259915U (en) | Single-chip microcomputer high-power PWM output circuit | |
| CN2924914Y (en) | Soft start circuit for micro-power power module | |
| CN209545554U (en) | A kind of IGBT negative pressure breaking circuit | |
| CN210351008U (en) | Double-switch-tube-driven current equalizing circuit | |
| CN206685695U (en) | A kind of pulse driving circuit for semiconductor laser | |
| CN208707612U (en) | A kind of load switch control circuit | |
| CN107612294A (en) | Drive Protecting Circuit and aero-ground power device | |
| CN205213118U (en) | Isolation constant-power color temperature adjusting device | |
| CN208044453U (en) | A kind of constant-current drive circuit of burn out detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170522 Address after: 225300 Taizhou Province in the eastern suburbs of Jiangsu City, the Seven Mile Bridge Patentee after: Jiangsu Dongqing Cnc Machine Tool Co., Ltd. Address before: 225300, Jiangsu, Taizhou City, Jiangsu Province, the eastern suburbs of seven Li bridge winter CNC machine tools Co., Ltd. Patentee before: Li Dongqing |