CN208461727U - A kind of current-limiting control circuit applied to motor - Google Patents
A kind of current-limiting control circuit applied to motor Download PDFInfo
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Abstract
The utility model provides a kind of current-limiting control circuit applied to motor, and circuit includes: drive and control of electric machine unit, phase inverter, electric current inductive reactance, operational amplifier and makes can control the signal generating unit of signal for generating；The drive and control of electric machine unit is connected with power end, the signal generating unit and the electric current inductive reactance respectively；The output end and input terminal of the phase inverter are connect with the drive and control of electric machine unit and signal generating unit respectively；The power input of the phase inverter is connect with the power output end of the operational amplifier, the positive input of the operational amplifier accesses reference voltage, the reverse input end of the operational amplifier is connect with the drive and control of electric machine unit and the electric current inductive reactance respectively, the electric current inductive reactance ground connection.The utility model, which is realized, is not necessarily to current-limiting resistance, and the simple and convenient peak point current realized when limiting motor powers on protects motor, the purpose of raising efficiency.
Description
Technical field
The utility model relates to Motor Control Field, espespecially a kind of current-limiting control circuit applied to motor.
Background technique
Motor is widely applied in daily life, but while powering on for motor great peak point current annoyings design
Person.Because powering in the short time in motor, motor is not started turning, at this time all access power supplies of entire coil, peak value electricity
It flows close to V/R.V is motor driven voltage, and R is electrical-coil internal resistance.General electrical-coil internal resistance only has several ohm, to generate
Peak point current can achieve 1 ampere or more.So big peak point current is not only difficult to realize board-level circuit, but also to preceding
Level power supply driving capability requires high.And long-time direct-driving motor, the service life of motor can be greatly reduced.
In order to reduce peak point current when motor powers on, there are two types of ways for mainstream.
1. adding current-limiting resistance on power supply, as shown in Figure 1.For example, Coil resistance be R, additional current-limiting resistance is also R, then on
Peak point current when electric just halves.But the method needs plus a powerful resistance is on power supply.Electricity additional simultaneously
Resistance energy dissipates completely, greatly reduces the efficiency of system.
2. motor switch controls signal and uses PWM timing control, as shown in Figure 2.The driving control signal that the PWM passes through
Change in duty cycle is from 0% to 100%.The drive current variations that can be in this way are relatively flat, and will not generate big peak value
Electric current.But it needs more complicated single-chip microcontroller to control.
Utility model content
The purpose of the utility model is to provide a kind of current-limiting control circuits applied to motor, realize and are not necessarily to current-limiting resistance,
The simple and convenient peak point current realized when limiting motor powers on, protects motor, the purpose of raising efficiency.
The technical scheme that the utility model is provided is as follows:
The utility model provides a kind of current-limiting control circuit applied to motor, comprising:
Drive and control of electric machine unit, phase inverter, electric current inductive reactance, operational amplifier and for generate make to can control signal
Signal generating unit；
The drive and control of electric machine unit respectively with power end, the signal generating unit and the electric current induced electricity
Resistance connection；The output end and input terminal of the phase inverter connect with the drive and control of electric machine unit and signal generating unit respectively
It connects；
The power input of the phase inverter is connect with the power output end of the operational amplifier, the operational amplifier
Positive input access reference voltage, the reverse input end of the operational amplifier respectively with the drive and control of electric machine unit
It is connected with the electric current inductive reactance, the electric current inductive reactance ground connection.
Further, the drive and control of electric machine unit includes:
Motor, p-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor；
The source electrode of the p-type metal-oxide-semiconductor is connect with the power end, and the grid and the signal of the p-type metal-oxide-semiconductor occur single
Member connection, the drain electrode of the p-type metal-oxide-semiconductor are connect with one end of the motor；
The other end of the motor is connect with the drain electrode of the N-type metal-oxide-semiconductor, the source electrode and the electric current of the N-type metal-oxide-semiconductor
Inductive reactance connection, the grid of the N-type metal-oxide-semiconductor are connect with the output end of the phase inverter；
The phase inverter is low level effectively with the phase inverter for enabling control terminal.
Further, the drive and control of electric machine unit further include:
Motor, p-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor；
The drain electrode of the N-type metal-oxide-semiconductor is connect with the power end, and the grid and the signal of the N-type metal-oxide-semiconductor occur single
Member connection, the source electrode of the N-type metal-oxide-semiconductor are connect with one end of the motor；
The other end of the motor is connect with the source electrode of the p-type metal-oxide-semiconductor, the drain electrode of the p-type metal-oxide-semiconductor and the electric current
Inductive reactance connection, the grid of the p-type metal-oxide-semiconductor are connect with the output end of the phase inverter；
The phase inverter is high level effectively with the phase inverter for enabling control terminal.
Further, the operational amplifier is single stage operational amplifier；The single stage operational amplifier includes: eight
Metal-oxide-semiconductor；
7th metal-oxide-semiconductor and the 8th metal-oxide-semiconductor common gate, the source electrode of the 7th metal-oxide-semiconductor are the positive input, the 8th metal-oxide-semiconductor
Source electrode be the reverse input end；
Current input terminal is connect with the source electrode of the first metal-oxide-semiconductor, the second metal-oxide-semiconductor respectively, and the first metal-oxide-semiconductor and third metal-oxide-semiconductor are total
Drain electrode, the second metal-oxide-semiconductor and the 4th metal-oxide-semiconductor common drain, the 5th metal-oxide-semiconductor and third metal-oxide-semiconductor common gate, the 6th metal-oxide-semiconductor and the 4th MOS
Pipe common gate；
5th metal-oxide-semiconductor and the 7th metal-oxide-semiconductor common drain, the 6th metal-oxide-semiconductor and the 8th metal-oxide-semiconductor common drain；Third metal-oxide-semiconductor, the 4th
The source electrode of metal-oxide-semiconductor, the 5th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor is grounded respectively；
Wherein, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 7th metal-oxide-semiconductor, the 8th metal-oxide-semiconductor are p-type metal-oxide-semiconductor, third metal-oxide-semiconductor, and
Four metal-oxide-semiconductors, the 5th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor are N-type metal-oxide-semiconductor.
Further, the operational amplifier is the operational amplifier of two-stage and two-stage or more.
By a kind of current-limiting control circuit applied to motor provided by the utility model, following at least one can be brought
The utility model has the advantages that
1) the utility model arrives opamp input terminal by low resistance resistance detection motor drive current size, feedback
And compared with reference voltage, negative feedback loop is formed, metering function is completed, avoids the pole that motor generates when opening
Big peak point current to the overcurrent damage of circuit system and motor itself, while reducing system prime current driving ability
It is required that.
2) the utility model feedback loop can accurately control the size of current by motor, and current limitation size by
Reference voltage and electric current inductive reactance determine there is configurability.
3) the utility model due to the resistance of electric current inductive reactance it is minimum, motor is in a rated operation hardly
The working efficiency of loss system reduces additional energy.
4) the utility model carries out peak point current when current limliting reduction motor powers on without current-limiting resistance, increases making for motor
While with the service life, the metering function due to reducing current-limiting resistance improves the efficiency of system to reduce energy consumption.
5) the utility model needs not move through complicated monolithic processor controlled PWM waveform control, and structure is simple, integrated chip
Degree is high, it is easy to accomplish.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to a kind of limit applied to motor
Above-mentioned characteristic, technical characteristic, advantage and its implementation of flow control circuit are further described.
Fig. 1 is in the prior art on power supply plus current-limiting resistance carries out the structural schematic diagram of current limliting；
Fig. 2 is the structural schematic diagram that PWM timing control carries out current limliting in the prior art；
Fig. 3 is the structural schematic diagram of the one embodiment for the current-limiting control circuit that the utility model is applied to motor；
Fig. 4 is the structural schematic diagram of another embodiment of the current-limiting control circuit that the utility model is applied to motor；
Fig. 5 is the structural schematic diagram of another embodiment of the current-limiting control circuit that the utility model is applied to motor；
Fig. 6 is the structural schematic diagram of the single stage operational amplifier for the current-limiting control circuit that the utility model is applied to motor；
Fig. 7 is that the technical program carries out electric current when the current waveform and non-current limliting direct-driving motor that flow through motor when current limliting
Flow through the current waveform contrast schematic diagram of motor；
Fig. 8 is electric current when direct-driving motor powers on and the technical program current limliting cross the current limliting of motor after drive electricity
Current vs' schematic diagram when machine powers on.
Specific embodiment
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, attached drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings, and obtains other embodiments.
To make simplified form, part relevant to the utility model is only schematically shown in each figure, they are not
Represent its practical structures as product.In addition, there is identical structure or function in some figures so that simplified form is easy to understand
The component of energy, only symbolically depicts one of those, or only marked one of those.Herein, "one" is not only
It indicates " only this ", can also indicate the situation of " more than one ".
The utility model embodiment, as shown in figure 3, according to the current-limiting control circuit for being applied to motor (Motor) shown in Fig. 3
Each unit and component are attached, wherein the current-limiting control circuit applied to motor (Motor) includes: motor
(Motor) drive control unit 100, phase inverter 200, electric current inductive reactance 300, operational amplifier 400 and enabled for generating
Control the signal generating unit 500 of signal, connection relationship therein are as follows:
Motor (Motor) drive control unit 100 respectively with power end (VDD), the signal generating unit 500,
And the electric current inductive reactance 300 connects；The output end and input terminal of the phase inverter 200 respectively with the motor
(Motor) drive control unit 100 and signal generating unit 500 connect；
The power input of the phase inverter 200 is connect with the power output end of the operational amplifier 400, the operation
The positive input of amplifier 400 accesses reference voltage, the reverse input end of the operational amplifier 400 respectively with the motor
(Motor) drive control unit 100 and the electric current inductive reactance 300 connection, the electric current inductive reactance 300 are grounded.
After putting up the current-limiting control circuit applied to motor (Motor) according to connection shown in Fig. 3, the signal occurs single
Member 500, which generates, makes can control signal, 100 ON operation of motor (Motor) drive control unit is controlled, when electric current inductive reactance
When the product of 300 pressure drop current value reaches reference voltage, feedback loop is generated, control flows into the electric current of motor (Motor)
It remains unchanged.Under the action of negative-feedback, so that motor (Motor) powers on the electric current for flowing through motor (Motor) in opening process
Stablize in a fixed value, which can estimate that operation obtains by following formula (1):
I=VREF/R (1)
Wherein, VREF is reference voltage, and I is the current value for flowing through electric current inductive reactance 300, and R is electric current inductive reactance 300
Resistance value.
The utility model arrives operational amplifier by low resistance resistance detection motor (Motor) driving current size, feedback
400 input terminals are simultaneously compared with reference voltage, form negative feedback loop, ensure the peak value electricity in motor (Motor) power up
Stream is maintained at fixed value, the great peak point current that motor (Motor) generates when opening is avoided, to circuit system
With the overcurrent damage of motor (Motor) itself, while the requirement of system prime current driving ability is reduced.Feedback loop can
Pass through the size of current of motor (Motor) with accurate control, and current limitation size is by reference voltage and electric current inductive reactance 300
Determine that there is configurability.In addition, carrying out peak point current when current limliting reduction motor (Motor) powers on without current-limiting resistance, increase
While adding the service life of motor (Motor), the metering function due to reducing current-limiting resistance mentions to reduce energy consumption
The efficiency of high system.In addition, it is not necessary that structure is simple, chip integration by complicated monolithic processor controlled PWM waveform control
It is high, it is easy to accomplish.
Preferably, as shown in figure 4, the motor (Motor) drive control unit 100 includes:
Motor (Motor), p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1)；
The source electrode of the p-type metal-oxide-semiconductor (PM1) is connect with the power end (VDD), the grid of the p-type metal-oxide-semiconductor (PM1)
It is connect with the signal generating unit 500, the drain electrode of the p-type metal-oxide-semiconductor (PM1) is connect with one end of the motor (Motor)；
The other end of the motor (Motor) is connect with the drain electrode of the N-type metal-oxide-semiconductor (NM1), the N-type metal-oxide-semiconductor
(NM1) source electrode is connect with the electric current inductive reactance 300, grid and the phase inverter 200 of the N-type metal-oxide-semiconductor (NM1)
Output end connection；
The phase inverter 200 is low level effectively with the phase inverter 200 for enabling control terminal.
At this point, control 500 input low level of signal generating unit make can control signal.
Specifically, due to 500 input low level of signal generating unit make can control signal so that p-type metal-oxide-semiconductor (PM1)
Conducting, and it is low level make to can control signal become high level after phase inverter 200 so that N-type metal-oxide-semiconductor (NM1) is led
Logical, leading to the route between p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1) conducting is the state of connection, so that being located at p-type
Motor (Motor) between metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1) conducting starts power up unlatching, establishes by cable on motor (Motor)
In the short time opened, since motor (Motor) internal resistance is minimum, so that flowing through p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1)
It is sharply increased with the electric current of electric current inductive reactance 300, IR pressure drop after electric current flows through electric current inductive reactance 300 is close to reference to electricity
When pressure, due to the feedback loop that operational amplifier 400 generates, the voltage of the grid end of N-type metal-oxide-semiconductor (NM1) is limited, to make
The electric current that motor (Motor) must be flowed through is stablized in a fixed value, which can estimate that operation obtains by following formula (1):
I=VREF/R (1)
Wherein, VREF is reference voltage, and I is the current value for flowing through electric current inductive reactance 300, and R is electric current inductive reactance 300
Resistance value.
As the electric current after current limliting flows continuously through motor (Motor), motor (Motor) exports revolving speed increasingly
Fastly, the impedance that motor (Motor) shows is increasing, and the driving current requirement needed is smaller and smaller, when electric current induced electricity
When the IR pressure drop of resistance 300 is less than VREF reference voltage value, under the action of negative-feedback, the grid end voltage quilt of N-type metal-oxide-semiconductor (NM1)
Lasting to increase, until the supply voltage close to power end (VDD), entire motor (Motor) is opened and is finished at this time, p-type metal-oxide-semiconductor
(PM1), N-type metal-oxide-semiconductor (NM1) is at normally state.In whole process, N-type metal-oxide-semiconductor (NM1) voltage waveform and flow through
The current waveform schematic diagram of motor (Motor) is as shown in Figure 7.And the technical program carries out flowing through motor (Motor) when current limliting
Current waveform flows through the current waveform contrast schematic diagram of motor (Motor) with electric current when non-current limliting direct-driving motor (Motor)
As shown in Figure 7, peak point current when direct-driving motor (Motor) powers on as can be seen from Figure 8 is more than 1A, and passes through this technology
After scheme current limliting, motor (Motor) peak point current is stablized in 2 times of rated current or so.Finally, when motor (Motor) enters
When rated operation, when power and direct-driving motor (Motor) when motor (Motor) works in the technical program work
Power be rated power.
Preferably, motor (Motor) drive control unit 100 further include:
Motor (Motor), p-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor (NM1)；
The drain electrode of the N-type metal-oxide-semiconductor (NM1) is connect with the power end (VDD), the grid of the N-type metal-oxide-semiconductor (NM1)
It is connect with the signal generating unit, the source electrode of the N-type metal-oxide-semiconductor (NM1) is connect with one end of the motor (Motor)；
The other end of the motor (Motor) is connect with the source electrode of the p-type metal-oxide-semiconductor (PM1), the p-type metal-oxide-semiconductor
(PM1) drain electrode is connect with the electric current inductive reactance 300, grid and the phase inverter 200 of the p-type metal-oxide-semiconductor (PM1)
Output end connection；
The phase inverter 200 is high level effectively with the phase inverter 200 for enabling control terminal.
At this point, control 500 input high level of signal generating unit make can control signal.
Specifically, due to 500 input high level of signal generating unit make can control signal so that N-type metal-oxide-semiconductor (NM1)
Conducting, and the signal that makes can control of high level becomes low level after phase inverter 200, so that p-type metal-oxide-semiconductor (PM1) is led
Logical, p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1) conducting cause between p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1) conducting
Route is the state of connection, so that being located at the motor (Motor) between p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1) conducting
Unlatching is started power up, on motor (Motor) in the short time of electric-opening, since motor (Motor) internal resistance is minimum, so that
The electric current for flowing through p-type metal-oxide-semiconductor (PM1), N-type metal-oxide-semiconductor (NM1) and electric current inductive reactance 300 sharply increases, when electric current flows through electric current
When IR pressure drop after inductive reactance 300 is close to reference voltage, due to the feedback loop that operational amplifier 400 generates, P is limited
The voltage of the grid end of type metal-oxide-semiconductor (PM1), so that the electric current for flowing through motor (Motor) is stablized in a fixed value, this is solid
Definite value can estimate that operation obtains by following formula (1):
I=VREF/R (1)
Wherein, VREF is reference voltage, and I is the current value for flowing through electric current inductive reactance 300, and R is electric current inductive reactance 300
Resistance value.
As the electric current after current limliting flows continuously through motor (Motor), motor (Motor) exports revolving speed increasingly
Fastly, the impedance that motor (Motor) shows is increasing, and the driving current requirement needed is smaller and smaller, when electric current induced electricity
When the IR pressure drop of resistance 300 is less than VREF reference voltage value, under the action of negative-feedback, the grid end voltage quilt of p-type metal-oxide-semiconductor (PM1)
Lasting to increase, until the supply voltage close to power end (VDD), entire motor (Motor) is opened and is finished at this time, p-type metal-oxide-semiconductor
(PM1), N-type metal-oxide-semiconductor (NM1) is at normally state.
Preferably, the operational amplifier 400 is single stage operational amplifier 400；The single stage operational amplifier 400 wraps
It includes: eight metal-oxide-semiconductors；
As shown in fig. 6, the 7th metal-oxide-semiconductor (M7) and the 8th metal-oxide-semiconductor (M8) common gate, the source electrode of the 7th metal-oxide-semiconductor (M7) is institute
Positive input is stated, the source electrode of the 8th metal-oxide-semiconductor (M8) is the reverse input end；
Current input terminal is connect with the source electrode of the first metal-oxide-semiconductor (M1), the second metal-oxide-semiconductor (M2) respectively, the first metal-oxide-semiconductor (M1) with
Third metal-oxide-semiconductor (M3) common drain, the second metal-oxide-semiconductor (M2) and the 4th metal-oxide-semiconductor (M4) common drain, the 5th metal-oxide-semiconductor (M5) and the 3rd MOS
Manage (M3) common gate, the 6th metal-oxide-semiconductor (M6) and the 4th metal-oxide-semiconductor (M4) common gate；
5th metal-oxide-semiconductor (M5) and the 7th metal-oxide-semiconductor (M7) common drain, the 6th metal-oxide-semiconductor (M6) and the 8th metal-oxide-semiconductor (M8) leak altogether
Pole；The source electrode of third metal-oxide-semiconductor (M3), the 4th metal-oxide-semiconductor (M4), the 5th metal-oxide-semiconductor (M5), the 6th metal-oxide-semiconductor (M6) is grounded respectively；
Wherein, the first metal-oxide-semiconductor (M1), the second metal-oxide-semiconductor (M2), the 7th metal-oxide-semiconductor (M7), the 8th metal-oxide-semiconductor (M8) is p-type
Metal-oxide-semiconductor, third metal-oxide-semiconductor (M3), the 4th metal-oxide-semiconductor (M4), the 5th metal-oxide-semiconductor (M5), the 6th metal-oxide-semiconductor (M6) is N-type metal-oxide-semiconductor.
This technology side uses operational amplifier 400, phase inverter 200, electric current inductive reactance 300 and p-type metal-oxide-semiconductor (PM1), N
Type metal-oxide-semiconductor (NM1) forms negative feedback loop, and limitation flows through the size of current of motor (Motor), avoids motor (Motor) and exist
The great peak point current generated when opening reduces the overcurrent damage of circuit system and motor (Motor) itself simultaneously
The requirement of system prime current driving ability.The electric current by motor (Motor) can be accurately controlled by feedback loop
Size, and current limitation size is determined by reference voltage and electric current inductive reactance 300, has configurability.Since electric current incudes
The resistance of resistance 300 is minimum, motor (Motor) the hardly working efficiency of loss system in a rated operation, drop
Low additional energy.Peak point current when current limliting reduction motor (Motor) powers on is carried out without current-limiting resistance, increases motor
(Motor) while service life, due to reducing the metering function of current-limiting resistance, to reduce energy consumption, system is improved
Efficiency.Complicated monolithic processor controlled PWM waveform control is needed not move through, structure is simple, and chip integration is high, is easy to real
It is existing.
It should be noted that above-described embodiment can be freely combined as needed.The above is only the utility model
Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle
Under the premise of, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (5)
1. a kind of current-limiting control circuit applied to motor characterized by comprising
Drive and control of electric machine unit, phase inverter, electric current inductive reactance and make can control the letter of signal for generating at operational amplifier
Number generating unit；
The drive and control of electric machine unit connects with power end, the signal generating unit and the electric current inductive reactance respectively
It connects；The output end and input terminal of the phase inverter are connect with the drive and control of electric machine unit and signal generating unit respectively；
The power input of the phase inverter is connect with the power output end of the operational amplifier, and the operational amplifier is just
To input terminal access reference voltage, the reverse input end of the operational amplifier respectively with the drive and control of electric machine unit and institute
State the connection of electric current inductive reactance, the electric current inductive reactance ground connection.
2. the current-limiting control circuit according to claim 1 applied to motor, which is characterized in that the drive and control of electric machine
Unit includes:
Motor, p-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor；
The source electrode of the p-type metal-oxide-semiconductor is connect with the power end, and the grid and the signal generating unit of the p-type metal-oxide-semiconductor connect
It connects, the drain electrode of the p-type metal-oxide-semiconductor is connect with one end of the motor；
The other end of the motor is connect with the drain electrode of the N-type metal-oxide-semiconductor, and the source electrode and the electric current of the N-type metal-oxide-semiconductor incude
Resistance connection, the grid of the N-type metal-oxide-semiconductor are connect with the output end of the phase inverter；
The phase inverter is low level effectively with the phase inverter for enabling control terminal.
3. the current-limiting control circuit according to claim 1 applied to motor, which is characterized in that the drive and control of electric machine
Unit further include:
Motor, p-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor；
The drain electrode of the N-type metal-oxide-semiconductor is connect with the power end, and the grid and the signal generating unit of the N-type metal-oxide-semiconductor connect
It connects, the source electrode of the N-type metal-oxide-semiconductor is connect with one end of the motor；
The other end of the motor is connect with the source electrode of the p-type metal-oxide-semiconductor, and the drain electrode of the p-type metal-oxide-semiconductor and the electric current incude
Resistance connection, the grid of the p-type metal-oxide-semiconductor are connect with the output end of the phase inverter；
The phase inverter is high level effectively with the phase inverter for enabling control terminal.
4. the current-limiting control circuit according to claim 1 applied to motor, which is characterized in that the operational amplifier is
Single stage operational amplifier；The single stage operational amplifier includes: eight metal-oxide-semiconductors；
7th metal-oxide-semiconductor and the 8th metal-oxide-semiconductor common gate, the source electrode of the 7th metal-oxide-semiconductor are the positive input, the source of the 8th metal-oxide-semiconductor
The extremely described reverse input end；
Current input terminal is connect with the source electrode of the first metal-oxide-semiconductor, the second metal-oxide-semiconductor respectively, the first metal-oxide-semiconductor and third metal-oxide-semiconductor common drain,
Second metal-oxide-semiconductor and the 4th metal-oxide-semiconductor common drain, the 5th metal-oxide-semiconductor and third metal-oxide-semiconductor common gate, the 6th metal-oxide-semiconductor and the 4th metal-oxide-semiconductor are total
Grid；
5th metal-oxide-semiconductor and the 7th metal-oxide-semiconductor common drain, the 6th metal-oxide-semiconductor and the 8th metal-oxide-semiconductor common drain；Third metal-oxide-semiconductor, the 4th MOS
Pipe, the source electrode of the 5th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor are grounded respectively；
Wherein, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 7th metal-oxide-semiconductor, the 8th metal-oxide-semiconductor are p-type metal-oxide-semiconductor, third metal-oxide-semiconductor, and the 4th
Metal-oxide-semiconductor, the 5th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor are N-type metal-oxide-semiconductor.
5. the current-limiting control circuit according to claim 1 applied to motor, which is characterized in that the operational amplifier is
Operational amplifier more than two-stage and two-stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821357813.6U CN208461727U (en) | 2018-08-22 | 2018-08-22 | A kind of current-limiting control circuit applied to motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821357813.6U CN208461727U (en) | 2018-08-22 | 2018-08-22 | A kind of current-limiting control circuit applied to motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208461727U true CN208461727U (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821357813.6U Withdrawn - After Issue CN208461727U (en) | 2018-08-22 | 2018-08-22 | A kind of current-limiting control circuit applied to motor |
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| CN (1) | CN208461727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067306A (en) * | 2018-08-22 | 2018-12-21 | 上海芯北电子科技有限公司 | A kind of current-limiting control circuit and method applied to motor |
-
2018
- 2018-08-22 CN CN201821357813.6U patent/CN208461727U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067306A (en) * | 2018-08-22 | 2018-12-21 | 上海芯北电子科技有限公司 | A kind of current-limiting control circuit and method applied to motor |
| CN109067306B (en) * | 2018-08-22 | 2023-12-08 | 上海芯北电子科技有限公司 | Current limiting control circuit and method applied to motor |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190201 Effective date of abandoning: 20231208 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190201 Effective date of abandoning: 20231208 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |