CN105790675A - Automatic leakage circuit for reverse electro-dynamic potential of motor - Google Patents
Automatic leakage circuit for reverse electro-dynamic potential of motor Download PDFInfo
- Publication number
- CN105790675A CN105790675A CN201610342645.2A CN201610342645A CN105790675A CN 105790675 A CN105790675 A CN 105790675A CN 201610342645 A CN201610342645 A CN 201610342645A CN 105790675 A CN105790675 A CN 105790675A
- Authority
- CN
- China
- Prior art keywords
- circuit
- motor
- comparator
- electromotive force
- inverse electromotive
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses an automatic leakage circuit for reverse electro-dynamic potential of a motor. The automatic leakage circuit comprises a switch circuit and a comparator, wherein the switch circuit is connected between a motor power supply and the ground; an in-phase input end of the comparator is connected with the motor power supply through a bleeder circuit; an inverted input end of the comparator is connected with a reference power supply; one path of the output end of the comparator is connected with a reference voltage through a pull-up resistor while the other path is connected with a control end of the switch circuit through a first current-limiting resistor. The automatic leakage circuit for the reverse electro-dynamic potential of the motor provided by the invention can repeatedly switch on/off the switch circuit in the whole braking process, the high-voltage reverse electro-dynamic potential can be continuously discharged and the protection for power supply device is facilitated.
Description
Technical field
The present invention relates to a kind of power protecting circuit, specifically, relate to a kind of automatic leadage circuit of motor inverse electromotive force.
Background technology
Increasing consumer unmanned plane occurs commercially.Three Brushless DC motors of most employing.Single motor operations electric current is up to 10A.During motor brake, producing bigger inverse electromotive force, inverse electromotive force is added on main power source, beyond the pressure scope of device on this electric power network, will be burnt out by device.Conventional way is to add TVS pipe discharge inverse electromotive force on electric power network.But TVS pipe can only the Instantaneous high-pressure of discharge Microsecond grade, and the persistent period of inverse electromotive force is up to tens even hundreds of milliseconds, so the effect of TVS pipe is undesirable.
Summary of the invention
When the present invention is to solve existing motor brake; produce bigger inverse electromotive force and be added on main power source; beyond the pressure scope of device on this electric power network; the problem easily power supply apparatus burnt out; propose a kind of automatic leadage circuit of motor inverse electromotive force; can continue to release to the inverse electromotive force of higher voltage value, be conducive to protection power supply apparatus.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of automatic leadage circuit of motor inverse electromotive force, including on-off circuit, comparator, described on-off circuit is connected between motor power and ground, the in-phase input end of described comparator is connected with motor power by bleeder circuit, the inverting input of described comparator is connected with reference power source, the outfan of described comparator is wherein leaded up to pull-up resistor and is connected with reference voltage, and the first current-limiting resistance of additionally leading up to is connected with the control end of described on-off circuit.
Further, the two ends of described on-off circuit are also parallel with TVS pipe.
Further, described bleeder circuit includes the second resistance and the 3rd resistance that are in series, and the in-phase input end of described comparator is connected between described second resistance and the 3rd resistance.
Further, the in-phase input end of described comparator wherein lead up to connection the first filter capacitor after be connected to ground.
Further, the inverting input of described comparator wherein lead up to connection the second filter capacitor after be connected to ground.
Further, described on-off circuit includes a NMOS tube, and the source electrode of described NMOS tube is connected with ground end, and drain electrode is connected with motor power, and grid is connected with the outfan of described comparator by described first current-limiting resistance.
Further, described on-off circuit includes a relay, and the outfan of described relay is connected between motor power and ground, and the end that controls of described relay is connected with the outfan of described comparator by described first current-limiting resistance.
nullCompared with prior art，Advantages of the present invention and the automatic leadage circuit of motor inverse electromotive force having the benefit effect that the present invention，The size of dividing potential drop Yu reference voltage by comparing motor power，Under normal circumstances，The dividing potential drop of motor power is less than reference voltage level，Comparator output signal controls on-off circuit and closes，Motor power does not carry out discharge voltage，When the dividing potential drop of motor power is more than reference voltage，Illustrate that motor is producing inverse electromotive force and is being superimposed on motor power，Now comparator output signal controls on-off circuit conducting，Motor power by on-off circuit release inverse electromotive force to ground end，The dividing potential drop of motor power declines simultaneously，When the dividing potential drop of motor power deteriorates to less than reference voltage，Comparator output signal controls on-off circuit and closes，Motor power stops discharge voltage，Owing to the brake of motor is also proceeding，So，After on-off circuit cuts out，Motor power can rise again，So in whole brake process，On-off circuit can be opened repeatedly、Turn off，Continue to release to the inverse electromotive force of higher voltage value，Be conducive to protection power supply apparatus.
After reading in conjunction with the accompanying the detailed description of embodiment of the present invention, the other features and advantages of the invention will become clearer from.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is motor inverse electromotive force automatic leadage circuit one embodiment functional-block diagram proposed by the invention；
Fig. 2 is motor inverse electromotive force automatic leadage circuit one embodiment circuit theory diagrams proposed by the invention.
Detailed description of the invention
Produce bigger inverse electromotive force during for current motor brake and be added on main power source, it is easily damaged power supply apparatus, and the method for inverse electromotive force of releasing is the mode adding TVS pipe discharge inverse electromotive force on electric power network by routine, but TVS pipe can only the Instantaneous high-pressure of discharge Microsecond grade, and owing to the motor brake persistent period is longer, therefore the persistent period of produced inverse electromotive force is up to tens even hundreds of milliseconds, so the effect of TVS pipe is undesirable.Based on more than, the present invention proposes a kind of automatic leadage circuit of motor inverse electromotive force, automatically the change in voltage of motor power is detected, and the voltage condition according to detected motor power automatically opens up or turn-off reversal electromotive force is released path, it is prevented that electric power network device is reversed the high pressure of electromotive force and burns out.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment one, the present embodiment proposes a kind of automatic leadage circuit of motor inverse electromotive force, as shown in Figure 1, including on-off circuit, comparator, on-off circuit is connected between motor power and ground, for being switched on or off between motor power and ground, owing to motor power voltage is much larger than reference voltage, therefore, the in-phase input end of comparator is connected with motor power by bleeder circuit, the inverting input of comparator is connected with reference power source, by motor power voltage is carried out dividing potential drop, can control when the normal range of motor power, input the dividing potential drop of the in-phase input end to comparator less than reference voltage, the outfan of comparator is wherein leaded up to pull-up resistor and is connected with reference voltage, first current-limiting resistance of additionally leading up to is connected with the control end of on-off circuit.nullThe operation principle of the automatic leadage circuit of motor inverse electromotive force of the present embodiment is，Comparator is by comparing the dividing potential drop of motor power and the size of reference voltage，Under normal circumstances，The dividing potential drop of motor power is less than reference voltage level，Comparator output signal controls on-off circuit and closes，Motor power does not carry out discharge voltage，When the dividing potential drop of motor power is more than reference voltage，Illustrate that motor is producing inverse electromotive force and is being superimposed on motor power，Now comparator output signal controls on-off circuit conducting，Motor power by on-off circuit release inverse electromotive force to ground end，The dividing potential drop of motor power declines simultaneously，When the dividing potential drop of motor power deteriorates to less than reference voltage，Comparator output signal controls on-off circuit and closes，Motor power stops discharge voltage，Owing to the brake of motor is also proceeding，So，After on-off circuit cuts out，Motor power can rise again，So in whole brake process，On-off circuit can be opened repeatedly、Turn off，Continue to release to the inverse electromotive force of higher voltage value，Be conducive to protection power supply apparatus.
In the present embodiment, as in figure 2 it is shown, the source electrode that on-off circuit includes a NMOS tube Q7, NMOS tube Q7 is connected with ground end, drain electrode is connected with motor power PVDD, and grid is connected by the outfan of the first current-limiting resistance R1 and comparator U6.nullDuring the work of this on-off circuit，Under normal circumstances，The dividing potential drop of motor power is less than reference voltage level，Namely the magnitude of voltage that normal phase input end input voltage value inputs less than negative-phase input，Therefore comparator output low level，Therefore NMOS tube Q7 cut-off，Path between motor power and ground disconnects，Do not carry out discharge voltage，When the dividing potential drop of motor power PVDD is more than reference voltage VCC，Illustrate that motor is producing inverse electromotive force and is being superimposed on motor power，The magnitude of voltage that now comparator U6 normal phase input end input voltage value inputs more than negative-phase input，Therefore comparator output terminal is pulled up resistance R1 and is pulled to high level，Therefore NMOS tube Q7 conducting，Motor power PVDD by NMOS tube Q7 release inverse electromotive force to ground end，The dividing potential drop of motor power PVDD declines simultaneously，When the dividing potential drop of motor power PVDD deteriorates to less than reference voltage VCC，Comparator U6 output low level，NMOS tube Q7 ends，Motor power PVDD stops discharge voltage，Owing to the brake of motor is also proceeding，So，After NMOS tube Q7 cut-off，Motor power PVDD can rise again，So in whole brake process，NMOS tube Q7 can open repeatedly、Turn off，Continue to release to the inverse electromotive force of higher voltage value,Until motor no longer produces bigger inverse electromotive force and is superimposed upon on electric power network.
In Fig. 2, the outfan of comparator U6 is wherein leaded up to pull-up resistor R1 and is connected with reference voltage VCC, the grid of the first current-limiting resistance R32 and NMOS tube Q7 of additionally leading up to is connected, first current-limiting resistance R32 is for ensureing to input the signal stabilization of the grid to NMOS tube Q7, the conducting state of control NMOS tube Q7 that therefore can be more stable.
Owing to the conducting of on-off circuit needs the response time, in order to the moment inverse electromotive force high pressure produced when just starting motor to brake carries out releasing, the two ends of on-off circuit (namely NMOS tube Q7 in Fig. 2) are also parallel with TVS pipe D1.Moment is raised at motor power PVDD, TVS pipe D1 transient switching, motor power PVDD is connected to ground, form a path of releasing, carrying out in discharge process at the TVS pipe D1 path of releasing formed, NMOS tube Q7 turns on, so even now TVS pipe D1 cut-off, the path of releasing formed by NMOS tube Q7 conducting remains valid, it is possible to inverse electromotive force is continued electric discharge.
As shown in Figure 2, bleeder circuit in the present embodiment includes the second resistance R2 and the three resistance R3 being in series, the in-phase input end of comparator U6 is connected between the second resistance R2 and the 3rd resistance R3, by adjusting the ratio of the second resistance R2 and the three resistance R3, and then the dividing potential drop inputting the in-phase input end to comparator U6 can be regulated.
Owing to comparator U6 requires that input current is less, therefore charging avoids the input of comparator U6 and voltage source to be directly connected to, it is prevented that damage comparison device, is also associated with the second current-limiting resistance R33 in the present embodiment between inverting input and the reference voltage VCC of comparator U6.
In order to filter motor power PVDD dividing potential drop input to comparator in-phase input end entrained by clutter, the in-phase input end of comparator U6 wherein lead up to connection the first filter capacitor C1 after be connected to ground.
In order to filter reference voltage VCC input to comparator inverting input entrained by clutter, the inverting input of comparator U6 wherein lead up to connection the second filter capacitor C2 after be connected to ground.
The on-off circuit of the present embodiment can also adopt a relay to realize, and the outfan of described relay is connected between motor power and ground, and the end that controls of described relay is connected with the outfan of described comparator by described first current-limiting resistance.
Certainly; described above is not limitation of the present invention; the present invention is also not limited to the example above, the change made in the essential scope of the present invention of those skilled in the art, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (7)
1. the automatic leadage circuit of motor inverse electromotive force, it is characterized in that: include on-off circuit, comparator, described on-off circuit is connected between motor power and ground, the in-phase input end of described comparator is connected with motor power by bleeder circuit, the inverting input of described comparator is connected with reference power source, the outfan of described comparator is wherein leaded up to pull-up resistor and is connected with reference voltage, and the first current-limiting resistance of additionally leading up to is connected with the control end of described on-off circuit.
2. the automatic leadage circuit of motor inverse electromotive force according to claim 1, it is characterised in that: the two ends of described on-off circuit are also parallel with TVS pipe.
3. the automatic leadage circuit of motor inverse electromotive force according to claim 2, it is characterised in that: described bleeder circuit includes the second resistance and the 3rd resistance that are in series, and the in-phase input end of described comparator is connected between described second resistance and the 3rd resistance.
4. the automatic leadage circuit of motor inverse electromotive force according to claim 3, it is characterised in that: the in-phase input end of described comparator wherein lead up to connection the first filter capacitor after be connected to ground.
5. the automatic leadage circuit of motor inverse electromotive force according to claim 2, it is characterised in that: the inverting input of described comparator wherein lead up to connection the second filter capacitor after be connected to ground.
6. the automatic leadage circuit of motor inverse electromotive force according to any one of claim 1-5, it is characterized in that: described on-off circuit includes a NMOS tube, the source electrode of described NMOS tube is connected with ground end, drain electrode is connected with motor power, and grid is connected with the outfan of described comparator by described first current-limiting resistance.
7. the automatic leadage circuit of motor inverse electromotive force according to any one of claim 1-5, it is characterized in that: described on-off circuit includes a relay, the outfan of described relay is connected between motor power and ground, and the end that controls of described relay is connected with the outfan of described comparator by described first current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342645.2A CN105790675A (en) | 2016-05-23 | 2016-05-23 | Automatic leakage circuit for reverse electro-dynamic potential of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342645.2A CN105790675A (en) | 2016-05-23 | 2016-05-23 | Automatic leakage circuit for reverse electro-dynamic potential of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105790675A true CN105790675A (en) | 2016-07-20 |
Family
ID=56379341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610342645.2A Pending CN105790675A (en) | 2016-05-23 | 2016-05-23 | Automatic leakage circuit for reverse electro-dynamic potential of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105790675A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289763A (en) * | 2019-07-25 | 2019-09-27 | 西安霍威电源有限公司 | Servo power supply module |
| CN112953311A (en) * | 2021-03-03 | 2021-06-11 | 珞石（北京）科技有限公司 | Hysteresis comparison voltage bleeder circuit |
| CN113937742A (en) * | 2021-09-26 | 2022-01-14 | 之江实验室 | Bleeder circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755737A (en) * | 1985-10-29 | 1988-07-05 | Mitsubishi Denki Kabushiki Kaisha | Control device for vehicle mounted generator |
| CN1456459A (en) * | 2003-03-31 | 2003-11-19 | 林朝楚 | High energy transient absorber of engine on vehicle |
| CN202363968U (en) * | 2011-12-14 | 2012-08-01 | 陕西千山航空电子有限责任公司 | Dual-power input selection and power reverse connection prevention circuit |
| CN202696140U (en) * | 2012-06-18 | 2013-01-23 | 杭州日鼎控制技术有限公司 | Power protection circuit with functions of soft boot and discharging |
| CN103904620A (en) * | 2012-12-28 | 2014-07-02 | 中兴通讯股份有限公司 | Direct current power supply input reverse irrigation prevention circuit and method |
| CN205647335U (en) * | 2016-05-23 | 2016-10-12 | 青岛歌尔声学科技有限公司 | Automatic bleeder circuit of motor reverse electromotive force |
-
2016
- 2016-05-23 CN CN201610342645.2A patent/CN105790675A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755737A (en) * | 1985-10-29 | 1988-07-05 | Mitsubishi Denki Kabushiki Kaisha | Control device for vehicle mounted generator |
| CN1456459A (en) * | 2003-03-31 | 2003-11-19 | 林朝楚 | High energy transient absorber of engine on vehicle |
| CN202363968U (en) * | 2011-12-14 | 2012-08-01 | 陕西千山航空电子有限责任公司 | Dual-power input selection and power reverse connection prevention circuit |
| CN202696140U (en) * | 2012-06-18 | 2013-01-23 | 杭州日鼎控制技术有限公司 | Power protection circuit with functions of soft boot and discharging |
| CN103904620A (en) * | 2012-12-28 | 2014-07-02 | 中兴通讯股份有限公司 | Direct current power supply input reverse irrigation prevention circuit and method |
| CN205647335U (en) * | 2016-05-23 | 2016-10-12 | 青岛歌尔声学科技有限公司 | Automatic bleeder circuit of motor reverse electromotive force |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289763A (en) * | 2019-07-25 | 2019-09-27 | 西安霍威电源有限公司 | Servo power supply module |
| CN112953311A (en) * | 2021-03-03 | 2021-06-11 | 珞石（北京）科技有限公司 | Hysteresis comparison voltage bleeder circuit |
| CN113937742A (en) * | 2021-09-26 | 2022-01-14 | 之江实验室 | Bleeder circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101453117B (en) | Opening surge current control device suitable for spacecraft power supply and distribution system | |
| CN103779828B (en) | Bidirectional, dc based on artificial zero passage cut-offs circuit and cutoff method thereof | |
| CN104022634B (en) | A kind of storage capacitor formula high and low pressure surge restraint circuit and suppressing method thereof | |
| CN205647335U (en) | Automatic bleeder circuit of motor reverse electromotive force | |
| CN105790675A (en) | Automatic leakage circuit for reverse electro-dynamic potential of motor | |
| CN202975135U (en) | Zero-cross detection circuit with low standby power consumption | |
| CN103326315B (en) | A kind of under-voltage protecting circuit and high voltage integrated circuit | |
| CN204216781U (en) | A kind of Switching Power Supply start-up circuit | |
| CN208922992U (en) | A kind of control relay circuit | |
| CN104135257A (en) | A novel steady practical controllable silicon triggering circuit | |
| CN104767505A (en) | Switching circuit with circuit protection function | |
| CN204290266U (en) | A kind of current foldback circuit | |
| CN204441853U (en) | A kind of overvoltage crowbar and electronic product | |
| CN105680418A (en) | Single-phase AC motor protection circuit, fan and air conditioner | |
| CN205584006U (en) | Prevent surge circuit, switching power supply and display device | |
| CN204216866U (en) | A kind of reset circuit and electronic equipment | |
| CN203973028U (en) | Argon arc welding hand switch signal isolation circuit | |
| CN109347466A (en) | A kind of switching circuit and electronic equipment | |
| CN204103467U (en) | A kind of protective circuit of automobile instrument circuit | |
| CN105634382A (en) | Single-phase alternating current protective circuit, fan and air condition | |
| CN104901266A (en) | Fuse trimming circuit | |
| CN105425620A (en) | Intelligent power switch capable of adjusting power-off time | |
| CN203827224U (en) | Power incoming self-starting circuit for electromotor | |
| CN204287846U (en) | A kind of multimode sequential control circuit | |
| CN103746571B (en) | A kind of supply unit adapting to pulse output loading |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160720 |
|
| RJ01 | Rejection of invention patent application after publication |