CN107658848A - Temperature of transistor sensing circuit and the voltage regulator with overheat protection function - Google Patents
Temperature of transistor sensing circuit and the voltage regulator with overheat protection function Download PDFInfo
- Publication number
- CN107658848A CN107658848A CN201711046363.9A CN201711046363A CN107658848A CN 107658848 A CN107658848 A CN 107658848A CN 201711046363 A CN201711046363 A CN 201711046363A CN 107658848 A CN107658848 A CN 107658848A
- Authority
- CN
- China
- Prior art keywords
- unit
- power
- trigger device
- temperature
- output end
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
- H02H7/205—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment for controlled semi-conductors which are not included in a specific circuit arrangement
Abstract
With overheat protection function voltage regulator, including sampling unit, threshold cell, oscillating unit, power trigger device unit, temperature of transistor sensing circuit and afterflow unit, sampling unit connects power positive cathode, sampling unit output end connects power trigger device unit input by threshold cell, temperature of transistor sensing circuit is connected between positive source and power trigger device unit input, oscillating unit connects power positive cathode, oscillating unit output end connects power trigger device unit input, the negative pole ground connection of power trigger device unit, power trigger device unit output end connects positive source by afterflow unit, power trigger device unit output end is used to control exciter current of generator；Power trigger device unit is the power D-flip flop for possessing overcurrent protection function; when generator voltage controller operating temperature exceedes permissible value, the conducting of temperature of transistor sensing circuit simultaneously makes it reduce excitation dutycycle or cut-out exciting current to power trigger device unit offer trigger signal.
Description
Technical field
The invention belongs to technical field of automobile electronic control, more particularly to temperature of transistor sensing circuit and protected with overtemperature
The voltage regulator of protective function.
Background technology
Existing car generator voltage controller does not possess overheat protection function typically, when generator operation environment temperature mistake
Gao Shi, frequently can lead to generator high temperature failure or its voltage regulator crosses cause thermal damage.
In automobile maintenance industry, it is frequently found to cause generator voltage controller to damage because temperature is too high, it is particularly existing
Vehicle electronic device is more, power load is larger, the high-temperature behavior to automobile current generator is a baptism, but due to hair
The reason for motor working environment, as generator is radiated and generator itself stator in enging cabin by engine temperature
The resistive heating of winding, the heating of rectifier bridge knot pressure drop, the heating of Exciting Windings for Transverse Differential Protection direct current, the heating of voltage regulator power tube saturation voltage drop etc.
Factor, automobile current generator is set to work in high temperature high current operating mode, such as when hot season, electrical equipment load are larger, generator is easy
Because heavier loads cross cause thermal damage, even trigger fire, therefore carry out temperature detection to generator and carry out load according to temperature
Limitation is beneficial to the safe handling of generator, and cause thermal damage generator phenomenon was reduced or avoided.
The content of the invention
The present invention is the temperature using transistor and amendment resistance sampling voltage regulator module, when transistor is due to environment
Temperature rise and during Dou Jiang areas in resistance-temperature curve, circuit is reduced or turned off excitation pulse in trigger voltage adjuster, from
And reduce generated output power and reduce generator temperature rise.The technical scheme is that：
According to first aspect present invention, there is provided a kind of temperature of transistor sensing circuit, its be characterized in that including：It is brilliant
Body pipe detection unit and temperature adjustmemt unit, the transistor detection unit have transistor, the temperature adjustmemt unit
For temperature adjustmemt resistance, and the emitter junction of the temperature adjustmemt resistance and the transistor is in parallel, for being led to the transistor
Logical impedance and the relation curve of institute's sense ambient temperature are modified.
According to second aspect of the present invention, there is provided a kind of generator voltage controller with overheat protection function, it is special
Different part is to include the temperature of transistor sensing circuit described in first aspect present invention.
It is further preferred that the invention provides one kind to have overheat protection function voltage regulator, its special character exists
In including:
Sampling unit, threshold cell, oscillating unit, temperature of transistor sensing circuit, power trigger device unit and afterflow list
Member,
The sampling unit connects power positive cathode, and the output end of sampling unit connects power trigger device by threshold cell
The input of unit, the temperature of transistor sensing circuit are connected to the input of positive source and the power trigger device unit
Between, the oscillating unit connects power positive cathode, and the output end of the oscillating unit connects the power trigger device unit
Input, the negative pole ground connection of the power trigger device unit, the output end of the power trigger device unit are connected by afterflow unit
Positive source is connect, the output end of the power trigger device unit is used to control exciter current of generator；The power trigger device list
Member is the power D-flip flop for possessing overcurrent protection function, when the generator voltage controller operating temperature exceedes permissible value
When, the temperature of transistor sensing circuit turns on and providing trigger signal to the power trigger device unit accounts for its reduction excitation
Sky ratio or cut-out exciting current.
It is further preferred that the invention provides one kind to have overheat protection function voltage regulator, its special character exists
In including:
Sampling unit, threshold cell, oscillating unit, temperature of transistor sensing circuit, power trigger device unit and afterflow list
Member,
The sampling unit connects power positive cathode, and the second of the output end connection power trigger device unit of sampling unit is defeated
Enter end, the temperature of transistor sensing circuit be connected to positive source and the power trigger device unit the second input it
Between, the oscillating unit connects power positive cathode, and the output end of the oscillating unit connects the of the power trigger device unit
Two inputs, the threshold cell connection connection power positive cathode, the output end of the threshold cell connect the power trigger
The first input end of device unit, the negative pole ground connection of the power trigger device unit, the output end of the power trigger device unit are led to
Afterflow unit connection positive source is crossed, the output end of the power trigger device unit is used to control exciter current of generator；Work as institute
When stating generator voltage controller operating temperature and exceeding permissible value, the temperature of transistor sensing circuit turns on and to the power
Flip-flop element, which provides trigger signal, makes it reduce excitation dutycycle or cut-out exciting current.
It is further preferred that the invention provides one kind to have overheat protection function voltage regulator, its special character exists
In including:
Sampling unit, threshold cell, oscillating unit, temperature of transistor sensing circuit, power trigger device unit and afterflow list
Member,
The sampling unit connects power positive cathode, and the second of the output end connection power trigger device unit of sampling unit is defeated
Enter end, the temperature of transistor sensing circuit be connected to positive source and the power trigger device unit the second input it
Between, the oscillating unit connects power positive cathode, and the output end of the oscillating unit connects the of the power trigger device unit
One input, the threshold cell are connected between the first end of the power trigger device unit and power cathode (i.e.), institute
The negative pole ground connection of power trigger device unit is stated, the output end of the power trigger device unit is connecting power supply just by afterflow unit
Pole, the output end of the power trigger device unit are used to control exciter current of generator；When the generator voltage controller work
When making temperature and exceeding permissible value, the temperature of transistor sensing circuit turns on and provides triggering letter to the power trigger device unit
It number is set to reduce excitation dutycycle or cut-out exciting current.
It is further preferred that the invention provides one kind to have overheat protection function voltage regulator, its special character exists
In including:
Sampling unit, threshold cell, compare amplifying unit, temperature of transistor sensing circuit, power cell and afterflow unit,
The sampling unit connects power positive cathode, and the output end of sampling unit compares amplification list by threshold cell connection
Member input, the temperature of transistor sensing circuit be connected to positive source and it is described relatively amplifying unit input it
Between, the negative pole ground connection of the power trigger device unit, the output end of the power trigger device unit connects electricity by afterflow unit
Source positive pole, the output end of the power trigger device unit are used to control exciter current of generator；When the generator voltage is adjusted
When device operating temperature exceedes permissible value, the temperature of transistor sensing circuit is turned on and provided to the power trigger device unit and touched
Signalling makes it reduce excitation dutycycle or cut-out exciting current.
It is further preferred that the invention provides one kind to have overheat protection function voltage regulator, its special character exists
In including:
Sampling unit, threshold cell, temperature of transistor sensing circuit, time-delay reset power trigger unit and afterflow unit,
The sampling unit connects power positive cathode, and the output end of sampling unit connects the delay again by threshold cell
The input of position power trigger unit, the temperature of transistor sensing circuit are connected to positive source and the time-delay reset power
Between the input of flip-flop element, the time-delay reset power trigger unit connects power positive cathode, the power trigger device
The output end of unit connects positive source by afterflow unit, and the output end of the time-delay reset power trigger unit is used to control
Exciter current of generator；The time-delay reset power trigger unit is to possess time-delay reset and the power-type of overcurrent protection function touches
Device is sent out, when the generator voltage controller operating temperature exceedes permissible value, the temperature of transistor sensing circuit conducting is simultaneously
There is provided trigger signal to the power trigger device unit makes it reduce excitation dutycycle or cut-out exciting current.
It is further preferred that the invention provides one kind to have overheat protection function voltage regulator, its special character exists
In including:
Sampling unit, regulator chip A2, temperature of transistor sensing circuit, power cell and afterflow unit,
The sampling unit connects power positive cathode, the output end connection adjustor chip A2 of sampling unit the first input
End, the temperature of transistor sensing circuit are connected between positive source and the regulator chip A2 the second input, institute
Regulator chip A2 connection power positive cathodes are stated, the output end of the regulator chip A2 connects the input of the power cell
End, the negative pole ground connection of the power cell, the output end of the power cell connect positive source, the work(by afterflow unit
The output end of rate unit is used to control exciter current of generator；When the generator voltage controller operating temperature exceedes permissible value
When, the temperature of transistor sensing circuit turns on and providing trigger signal to the power trigger device unit accounts for its reduction excitation
Sky ratio or cut-out exciting current.
The beneficial effects of the invention are as follows：Voltage regulator temperature is detected by transistor, to generator and voltage regulator
Overtemperature prote is carried out, makes generator operation more reliable, safe, and circuit structure design is ingenious, succinct, component is less,
Cost is low, is easy to scale volume production, and economic benefit and social benefit are obvious.
Brief description of the drawings
Fig. 1 is a kind of temperature of transistor sensing circuit schematic diagram that embodiment of the present invention provides,
Fig. 2 is another temperature of transistor sensing circuit schematic diagram that embodiment of the present invention provides,
Fig. 3 is the relation curve schematic diagram of temperature of transistor sensing circuit conduction impedance and institute's sense ambient temperature,
The first of Fig. 4 embodiment of the present invention offer has overheat protection function voltage modulator circuit structure square frame
Figure,
The first of Fig. 5 embodiment of the present invention offer has overheat protection function voltage modulator circuit structural representation
Figure,
Fig. 6 is trigger waveform schematic diagram in Fig. 5,
Second of Fig. 7 embodiment of the present invention offer has overheat protection function voltage modulator circuit structural representation
Figure,
Fig. 8 is trigger waveform schematic diagram in Fig. 7,
The third of Fig. 9 embodiment of the present invention offer has overheat protection function voltage modulator circuit structural representation
Figure,
Figure 10 is trigger waveform schematic diagram in Fig. 9,
The 4th kind of Figure 11 embodiment of the present invention offer has overheat protection function voltage modulator circuit structure square frame
Figure,
The 4th kind of Figure 12 embodiment of the present invention offer has overheat protection function voltage modulator circuit structural representation
Figure,
The 5th kind of Figure 13 embodiment of the present invention offer has overheat protection function voltage modulator circuit structure square frame
Figure,
The 5th kind of Figure 14 embodiment of the present invention offer has overheat protection function voltage modulator circuit structural representation
Figure,
The 6th kind of Figure 15 embodiment of the present invention offer has overheat protection function voltage modulator circuit structural representation
Figure.
Embodiment
The present invention is illustrated with reference to specific embodiment.
In a first aspect, embodiment of the present invention provides temperature of transistor sensing circuit.
Embodiment 1
As shown in figure 1, this temperature of transistor sensing circuit basic structure includes, transistor detection unit 101 and temperature
Amending unit 102, transistor detection unit are with the transistor Q101 for treating testing temperature range-sensitive, triode Q101
NPN transistor, temperature adjustmemt unit are temperature adjustmemt resistance R101, and temperature adjustmemt resistance R101 and transistor Q101 transmitting
Knot is in parallel, for being modified to the transistor turns impedance and the relation curve of institute sense ambient temperature.
Embodiment 2
Embodiment of the present invention provides another temperature of transistor sensing circuit, as shown in Fig. 2 its basic structure bag
Include, transistor detection unit 201 and temperature adjustmemt unit 202, transistor detection unit, which has, treats testing temperature range-sensitive
Transistor Q201, triode Q101 are PNP transistor, and temperature adjustmemt unit is temperature adjustmemt resistance R201, and temperature is repaiied
Positive resistance R201 and transistor Q201 emitter junction are in parallel, for the transistor turns impedance and institute's sense ambient temperature
Relation curve is modified.
In above-mentioned two embodiment, in the case where transistor does not have base bias current, at normal temperatures (15~30 DEG C of room temperature)
Its leakage current is minimum, and leak resistance is typically more than 1000M Ω between collector and emitter.As shown in figure 3, but work as temperature liter
Gao Shi, such as in the emitter stage parallel connection 820K Ω resistance of certain model silicon transistor, its leak impedance varies with temperature curve such as Fig. 3
In curve 600 shown in, the conduction impedance of the temperature of transistor sensing circuit strongly reduces between about 110 DEG C~140 DEG C, again
Such as：When the resistance is changed into 620K Ω, its leak impedance varies with temperature curve as shown in the curve 601 in Fig. 3, about
The conduction impedance of the temperature of transistor sensing circuit is strongly reduced between 140 DEG C~170 DEG C, and the temperature of damage is not affected by transistor
Degree scope (general 220 DEG C of mistake) can utilize this characteristic, and overtemperature prote is carried out to detect circuit operating temperature.Particularly suitable for
To the temperature protection of car generator voltage controller.
Second aspect, embodiment of the present invention are provided with overheat protection function voltage regulator.
Embodiment 3
The first of embodiment of the present invention offer has overheat protection function voltage modulator circuit block diagram such as
Shown in Fig. 4, its basic structure includes, sampling unit 11, threshold cell 12, oscillating unit 14, temperature of transistor sensing circuit 13,
Power trigger device unit 15 and afterflow unit 16.
The sampling unit 11 connects power positive cathode, and the output end of sampling unit connects power by threshold cell 12 and touched
The input of device unit 15 is sent out, the temperature of transistor sensing circuit 13 is connected to positive source and the power trigger device unit
Input between, the oscillating unit 14 connects power positive cathode, and the output end of the oscillating unit connects the power and touched
The input of device unit, the negative pole ground connection of the power trigger device unit are sent out, the output end of the power trigger device unit passes through
Afterflow unit 15 connects positive source, and the output end of the power trigger device unit is used to control exciter current of generator；It is described
Power trigger device unit 15 is the power D-flip flop for possessing overcurrent protection function, when generator voltage controller work temperature
When degree exceedes permissible value, the temperature of transistor sensing circuit, which turns on and provides trigger signal to the power trigger device unit, to be made
It reduces excitation dutycycle or cut-out exciting current.
Fig. 5 is the electrical block diagram of the voltage regulator, including：Sampling unit 11 includes resistance R1, R2 and electric capacity
C1, resistance R1 and R2 are connected in series between power positive cathode, and for detecting power positive cathode voltage, resistance R1 connects section with R2
Point is that divider node is sampled signal output end, and the end is also connected to filter capacitor C1 over the ground.
Threshold cell 12 includes voltage-stabiliser tube D1, and its negative pole connects with sampled signal output end, and voltage-stabiliser tube D1 is threshold cell
Output end.
Oscillating unit 14 is an oscillating circuit, and frequency burst pulse is determined in generation, and its impulse waveform is as shown in fig. 6, the pulse is low
The effective burst pulse of level (as shown at 201), it is high-impedance state between its non-low period (as shown in 200).
Temperature of transistor sensing circuit 13 is a temperature of transistor sensing circuit, and resistance R101 is attempted by NPN triode
On Q101 emitter junctions, triode Q101 colelctor electrode connection positive source, triode Q101 emitter stage connection power trigger device
The signal input part of unit 15.
Power trigger device unit 15 includes triode Q11, FET Q12, resistance R4 and R3, triode Q11 transmitting
Pole and FET Q12 source grounding (i.e. power cathode -- as follows), triode Q11 colelctor electrode connect FET
Q12 grid, triode Q11 colelctor electrode are also connected to by resistance R4 connection positive sources, resistance R4 as feedback resistance
Between triode Q11 base stage and FET Q12 error of omission, triode Q11 base stage is as power trigger device unit 15
Input, the power field effect pipe Q12 output end to drain as power trigger device unit 15, for controlling generator excitation electric
Stream, triode Q11 base stage are also connected with voltage-stabiliser tube D1 positive pole.
Afterflow unit 16 is sustained diode 2, and its positive pole connects the output end of power trigger device unit 15, negative pole connection
Positive source.
The course of work of circuit is as follows：
Oscillating unit exports the effective burst pulse of low level, as shown in 201 in Fig. 6, the dotted line table of pulse high level 200
Show, be because oscillating unit output end is high-impedance state between non-low period.
When burst pulse negative edge each time arrives, triode Q11 base potential is pulled low, so triode Q11 ends,
Resistance R4 provides grid voltage for power field effect pipe Q12, turns on power tube Q12, connects exciting current, and power tube drain electrode is defeated
Go out low potential, general FET is below 0.45V in the saturation voltage drop of exciting current grade, and the emitter junction of general triode
Conduction threshold is in more than 0.56V, so now power tube drain potential is not enough to launch triode Q11 by feedback resistance R3
Knot produces base current, and triode Q11 ends if now diode D1 cut-offs and triode Q101 are also switched off, i.e.,：By three poles
" the power D-flip flop " of pipe Q11 and power tube Q12 level feedback resistances R3 compositions is maintained at the stable state of power tube conducting.
When generator output voltage exceedes setting value, sampling unit partial pressure value makes threshold cell voltage-stabiliser tube D1 reversely lead
It is logical, base current is provided for triode Q11, then triode Q11 is turned on, and its collector potential reduces, and is then power
Pipe Q12 ends, and the rise of Q12 drain potentials, Q11 base currents is enhanced by feedback resistance R3, even if now generator exports
Voltage is less than setting value, voltage-stabiliser tube D1 also no longer reverse-conducting, but Q12 drain electrode high potentials now are connect by feedback resistance R3
Continuous Q11 base currents, make power tube Q12 still off, i.e.,：It is made up of triode Q11 and power tube Q12 level feedback resistances R3
" power D-flip flop " is maintained at the stable state of power tube cut-off；Until the negative edge burst pulse of oscillating unit output arrives again
When, " power D-flip flop " can just overturn and is maintained at the stable state of power tube conducting.
During power tube conducting when generator output voltage is less than setting value, if because temperature is too high, make transistor
Temperature sensing circuit 13 produces leakage current, it will triggering " power D-flip flop " overturns and is maintained at the stabilization of power tube cut-off
State, so that generator stops output, reduce temperature rise, protection generator and its voltage regulator.When generator-temperature detection reduces
To normal range (NR), triode Q101 leakage currents are strongly reduced, and its leak resistance is replied close to normal temperature numerical value, then is vibrated next time
The burst pulse of unit arrives just overturn again recovers normal work for excited state, voltage regulator.If but continuous high temperature,
Then it plan can turn on power tube Q12 between the burst pulse low period of oscillating unit, the cut-off of remaining period power tube, therefore generate electricity
Machine not electromotive power output, its own stator winding copper loss stops heating, rectifier bridge also stops heating, generator-temperature detection will drop
It is low.
In addition, there is power tube by triode Q11 and power tube Q12 level feedback resistances R3 " the power D-flip flop " formed
Overcurrent protection function：When power tube turns on because excessively stream makes its saturation voltage drop be higher than normal value, then it can pass through feedback resistance R3
Trigger triode Q11 is turned on, and triggers the upset of power trigger device unit to be vibrated for the stable state of power tube cut-off when next time
The burst pulse of unit arrives can just overturn as excited state again, if but sustained short-circuit, can be in the burst pulse of oscillating unit
Plan turns on power tube Q12 between low period, the cut-off of remaining period power tube, therefore narrow pulse width general recommendations ＜ 10 is micro-
Second, or dutycycle ≯ 1%.
Embodiment 4
Embodiment of the present invention, which provides second, has overheat protection function voltage regulator, its circuit structure such as Fig. 7
It is shown,
Including sampling unit 11, threshold cell 22, oscillating unit 14, temperature of transistor sensing circuit 13, power trigger device
Unit 35 and afterflow unit 16.
Sampling unit 11 includes resistance R1, R2 and electric capacity C1, and resistance R1 and R2 are connected in series between power positive cathode, uses
In detection power positive cathode voltage, resistance R1 and R2 connecting node is that divider node is sampled signal output end, and the end is also over the ground
It is connected to filter capacitor C1.
Threshold cell is made up of resistance R6 and voltage-stabiliser tube D3, and resistance R6 connects with voltage-stabiliser tube D3 negative pole is used as threshold voltage
Output end, resistance R6 other ends connection positive source, voltage-stabiliser tube D3 plus earths.
Oscillating unit 14 is an oscillating circuit, and frequency burst pulse is determined in generation, and its impulse waveform is as shown in figure 8, the pulse is low
The effective burst pulse of level (as shown in 301), it is high-impedance state (as shown at 300) between its non-low period.
Temperature of transistor sensing circuit 13 is identical with embodiment 3.
Power trigger device unit 35 includes comparator A1, power tube Q22 and feedback resistance R7, comparator A1 anti-phase input
Hold the leakage for passing through feedback resistance R7 connection power tubes Q22 for the second input of power trigger device unit 15, second input
Pole, power tube Q22 source ground, comparator A1 inverting input are also connected with oscillating unit output end and sampling unit output
End, and positive source is connected by temperature of transistor sensing circuit 13.Comparator A1 in-phase input end is power trigger device
The first input end of unit 15 connects the output end of threshold cell, and comparator A 1 output end connects power tube Q22 grid, than
Power positive cathode is also connected with compared with device A 1.
Afterflow unit 16 is sustained diode 2, and its positive pole connects the output end of power trigger device unit 15, negative pole connection
Positive source.
When generator voltage controller operating temperature exceedes permissible value, temperature of transistor sensing circuit turns on and to described
Power trigger device unit, which provides trigger signal, makes it reduce excitation dutycycle or cut-out exciting current.
Operation principle is described below:
" power D-flip flop " is formed by comparator A1, power tube Q22 and feedback resistance R7, it there are two kinds of stable states：When
The stable state of power tube Q22 conductings, the stable state that another is power tube Q22 cut-offs, in generator output voltage less than setting value, electricity
When pressing adjuster without departing from temperature allowed range, when the negative edge of burst pulse each time of oscillating unit arrives, comparator A1's is anti-
Mutually input terminal potential is pulled low, and now in-phase input end is fixed voltage-stabiliser tube D3 voltage stabilizing value, so comparator A1 is exported
High level, power tube Q22 is turned on, connect exciting current, power tube drain electrode output low potential, general FET is in excitation electricity
The saturation voltage drop for flowing grade is below 0.45V, and the reference threshold voltage in comparator A1 in-phase input ends is usually set to
Between 4.7V~10V, so now " power D-flip flop " is in the stable state of power tube Q22 conductings.
When generator output voltage is higher than setting value or temperature of transistor sensing circuit senses to overtemperature, sampling unit
Output overvoltage signal or temperature of transistor sensing circuit output overtemperature signal, it can all make comparator A1 anti-phase input terminal potential
Higher than homophase input terminal potential, triggering " power D-flip flop " upset is the stable state of power tube cut-off, when vibrating list next time
The triggering burst pulse of member can just make " power trigger device unit " upset be excitation state when arriving.
In addition, " the power D-flip flop " of the present embodiment also has power tube overcurrent protection function：When power tube turns on
Because excessively stream makes its saturation voltage drop be higher than normal value, then it is power that the upset of power trigger device unit can be triggered by feedback resistance R7
The stable state of pipe cut-off, it can just be overturn again as excited state when the burst pulse of oscillating unit next time arrives.
Embodiment 5
Embodiment of the present invention, which provides the third, has overheat protection function voltage regulator, its circuit structure such as Fig. 9
Shown, circuit includes:
Sampling unit 11, threshold cell 12, oscillating unit 14, temperature of transistor sensing circuit 13, power trigger device unit
15 and afterflow unit 16.
Sampling unit 11 includes resistance R1, R2 and electric capacity C1, and resistance R1 and R2 are connected in series between power positive cathode, uses
In detection power positive cathode voltage, resistance R1 and R2 connecting node is that divider node is sampled signal output end, and the end is also over the ground
It is connected to filter capacitor C1.
Threshold cell includes voltage-stabiliser tube D4, and voltage-stabiliser tube D4 negative pole connects as threshold voltage output end, voltage-stabiliser tube D4 positive poles
Ground.
Oscillating unit 14 is an oscillating circuit, and frequency burst pulse is determined in generation, and its impulse waveform is as shown in Figure 10, and the pulse is height
The effective burst pulse of level (as indicated at 400), it is high-impedance state between its non-high period (as shown in 401).
Temperature of transistor sensing circuit 13 is identical with embodiment 3.
Power trigger device unit 15 includes comparator A1, power tube Q32 and feedback resistance R8, comparator A1 homophase input
Hold the output for passing through feedback resistance R8 connection comparators A1 for the first input end of power trigger device unit 15, the first input end
End, first input end are also connected with the voltage-regulator diode D4 negative poles of threshold cell, voltage-regulator diode D4 plus earths.Power tube Q32
Source ground, comparator A1 inverting input connects sampling unit output for the second input of power trigger device unit 15
Hold and pass through temperature of transistor sensing circuit 13 and connect positive source.Comparator A 1 output end connection power tube Q32's
Grid, comparator A 1 are also connected with power positive cathode.The output end connection comparator A1 of oscillating unit 14 in-phase input end.
Afterflow unit 16 is sustained diode 2, and its positive pole connects the output end of power trigger device unit 15, negative pole connection
Positive source.
When generator voltage controller operating temperature exceedes permissible value, temperature of transistor sensing circuit turns on and to described
Power trigger device unit, which provides trigger signal, makes it reduce excitation dutycycle or cut-out exciting current.
Operation principle is described below:
" trigger " is formed by comparator A1 and positive feedback resistor R8, it there are two kinds of stable states：First, comparator A1 outputs are high
Level makes stable state, another stable state for ending power tube Q32 for comparator A1 outputs low level that power tube Q32 is turned on,
When generator output voltage is less than setting value, voltage regulator without departing from temperature allowed range, in the narrow each time of oscillating unit
When rising edge of a pulse arrives, comparator A1 homophase input terminal potential is elevated and is that voltage-stabiliser tube D4 voltage stabilizings (can typically be set
For such as 6.5V), and now inverting input is that sampling unit output voltage is less than voltage-stabiliser tube D4 voltage stabilizing values, so comparator A1 is defeated
Go out high level, turn on power tube Q32, connect exciting current, power tube drain electrode output low potential, general FET is in excitation
The saturation voltage drop of current class is below 0.45V, and has obtained the high electricity of comparator output terminal in comparator A1 in-phase input ends
Reference threshold voltage of the position through resistance R8 and after voltage-stabiliser tube D4 voltage stabilizings, so now comparator A1 exports high level to stablize shape
State, power tube Q22 conductings.
When generator output voltage is higher than setting value or temperature of transistor sensing circuit senses to overtemperature, sampling unit
Output overvoltage signal or temperature of transistor sensing circuit output overtemperature signal, it can all make comparator A1 anti-phase input terminal potential
Higher than homophase input terminal potential, triggering " power D-flip flop " upset is the stable state of power tube cut-off, when vibrating list next time
The triggering burst pulse of member can just make " power trigger device unit " upset be excitation state when arriving.
Embodiment 6
Embodiment of the present invention, which provides the 4th kind, has overheat protection function voltage regulator, its circuit structure such as Figure 11
Shown in Figure 12, circuit includes:
Sampling unit 11, threshold cell 12, compare amplifying unit 34, temperature of transistor sensing circuit 13, power cell 55
With afterflow unit.
Sampling unit connects power positive cathode, and the output end of sampling unit compares amplifying unit by threshold cell connection
Input, temperature of transistor sensing circuit are connected between positive source and the input for comparing amplifying unit, power trigger device
The negative pole ground connection of unit, the output end of power trigger device unit connect positive source, power trigger device unit by afterflow unit
Output end be used for control exciter current of generator；When generator voltage controller operating temperature exceedes permissible value, transistor
Temperature sensing circuit turns on and providing trigger signal to power trigger device unit makes it reduce excitation dutycycle or cut-out excitation electricity
Stream.
Because the present embodiment is based on existing voltage regulator basic circuit, temperature of transistor sensing circuit is additionally arranged
13, so the art general staff should be readily appreciated that its operation principle, repeat no more here.
Embodiment 7
Embodiment of the present invention, which provides the 4th kind, has overheat protection function voltage regulator, its circuitry block graph structure
Such as Figure 13, including:
Sampling unit 11, threshold cell 12, temperature of transistor sensing circuit 23, time-delay reset power trigger unit 25 and continuous
Flow unit 16.
Sampling unit connects power positive cathode, and the output end of sampling unit connects time-delay reset power by threshold cell and touched
The input of bill member, temperature of transistor sensing circuit are connected to the input of positive source and time-delay reset power trigger device unit
Between end, time-delay reset power trigger unit connection power positive cathode, the output end of power trigger device unit passes through afterflow unit
Positive source is connected, the output end of time-delay reset power trigger unit is used to control exciter current of generator；Time-delay reset power
Trigger element is the power D-flip flop for possessing time-delay reset and overcurrent protection function, when generator voltage controller operating temperature
During more than permissible value, the conducting of temperature of transistor sensing circuit simultaneously makes its reduce excitation to power trigger device unit offer trigger signal
Dutycycle or cut-out exciting current.
Circuit structure is as shown in figure 14：
Sampling unit 11 includes resistance R1, R2 and electric capacity C1, and resistance R1 and R2 are connected in series between power positive cathode, uses
In detection power positive cathode voltage, resistance R1 and R2 connecting node is that divider node is sampled signal output end, and the end is also over the ground
It is connected to filter capacitor C1.
Threshold cell includes voltage-stabiliser tube D1, and the output end of voltage-stabiliser tube D1 negative pole connection sampling unit, voltage-stabiliser tube D1 is just
The input of pole connection time-delay reset power trigger unit 25.
Temperature of transistor sensing circuit 23 is a temperature of transistor sensing circuit, and resistance R201 is attempted by PNP triode
On Q201 emitter junctions, triode Q101 emitter stage connection positive source, triode Q101 colelctor electrode also connect time-delay reset
The input of power trigger unit 25.
Time-delay reset power trigger unit 25 includes：Triode Q131, Q132, Q134, power field effect pipe Q133, electric capacity
C132, C133, resistance R130, R131, R132 and R133, triode Q131 base stage is time-delay reset power trigger unit 25
Input, the over-pressed signal for differentiating to obtain through threshold cell voltage-stabiliser tube for reception, goes back receiving crystal pipe temperature sensing circuit 63
The overtemperature signal often come；Triode Q131 colelctor electrode connection power tube Q133 grid, triode Q131 emitter stage connection
Triode Q132 colelctor electrode, triode Q132 grounded emitter；Triode Q132 base stage passes through resistance R132 connections electricity
R133 one end, resistance R133 other end connecting triode Q134 colelctor electrodes are hindered, triode Q134 emitter stage connects positive source,
Triode Q134 base stage is also connected with afterflow two by resistance R131 connection power tubes Q133 drain electrode, power tube Q133 drain electrode
Pole pipe D2 positive pole simultaneously is used to control exciting current of the generator from winding, and the negative pole connection power supply of sustained diode 2 is just
Pole；Electric capacity C132 is connected between triode Q132 base stages and Q134 base stage, and electric capacity C133 is connected to triode Q131 current collections
Between pole and voltage-stabiliser tube D130 negative poles.Feedback resistance R130 is connected between triode Q131 base stages and power tube Q133 drain electrodes.Surely
Pressure pipe D130 negative poles connect power tube Q133 grids, voltage-stabiliser tube D130 plus earths.
Circuit operation principle is described below：
The operation principle of time-delay reset power trigger unit 25 is illustrated first.
After power on, power tube has two states：That is on or off.
If 1. power tube Q133 normallies, its drain for low potential (in generator voltage controller field, general field
Effect pipe normally saturation voltage drop can be in below 0.45V), because the saturation voltage drop is less than the conducting of triode Q131 emitter junctions
Threshold value, so no matter whether triode Q132 turns on, triode Q131 necessarily ends.
Due to when upper electric, as power tube Q133 conducting will turn on triode Q134, triode Q134 collection
Electrode potential charges through resistance R133 to electric capacity C133：Charge path is positive source (D+/B+) → Q134 → R133 → C133
→ Q133 grids → Q133 source electrodes → ground, in this path, power tube FET Q133 gate-source capacitance equiva lent impedance is maximum,
So terminal voltage is mainly dropped in the gate-source junctions of power tube under resistance R133, voltage-stabiliser tube D130 is used to protect power tube gate-source junctions not
As for because of over-voltage breakdown, power tube is to recharge here to obtain gate drive voltage and turn on path.
According to above-mentioned, power tube Q133 conductings are stable state.
2. if power tube Q133 ends, its drain electrode is high potential, first ends triode Q134, power tube grid is not
Grid voltage, which can be obtained, to be ended, but due to it is upper electric when triode Q134 emitter junction and Q132 emitter junction will be electric capacity
C132 charges, and the charging current constitutes the base bias current of two transistors, therefore triode Q132 and Q134 will be led moment
Logical, it is that power tube grid provides gate drive voltage that thus will enable electric capacity C133 chargings, even if power tube has a bit
Conducting can also increase triode Q134 base current through resistance R131, make triode Q134 collector currents into more times of increases,
Then trigger to charge to electric capacity C133 and accelerate, power tube grid potential is drastically increased to voltage-stabiliser tube D130 voltage stabilizings from cut-in voltage
Value, power tube thus saturation conduction, therefore power tube cut-off is that meeting is automatically reset to turning on, according to above-mentioned, power tube Q133
End for unsteady state.
To sum up, power tube will enter the stable state of conducting after being powered up.
If generator output voltage is less than the temperature threshold of overtemperature prote less than setting value and voltage regulator temperature
Point, then voltage-stabiliser tube D1 cut-offs, triode Q201 cut-offs, the power tube conducting of above-mentioned time-delay reset power trigger unit 25, excitation
Electric current is switched on.
If generator output voltage is higher than the temperature threshold of overtemperature prote higher than setting value or voltage regulator temperature
Point, then voltage-stabiliser tube D1 reverse-conductings or triode Q201 turned on due to overtemperature, then can trigger above-mentioned time-delay reset power trigger
The power tube cut-off of unit 25, exciting current drop are cut off, and detailed process is as follows：
In the stable state that exciting current is connected, triode Q134 conductings, the current potential of electric capacity C133 positive poles will also pass through electricity
Resistance R132 provides base current for triode Q132 makes its saturation conduction, but now triode Q131 base potential is equal to power
Pipe drain potential (electric current on feedback resistance R130 is 0), is insufficient to allow triode Q131 to turn on, this maintains above-mentioned stable state.
When the overtemperature that over-pressed signal or triode Q201 of the appearance from voltage-stabiliser tube D1 reverse-conductings is turned on due to overtemperature
Signal, it will all trigger triode Q131 to turn on, drag down power tube grid potential → power tube drain potential is raised → and pass through instead
Feed resistance R130 → further increase triode Q131 base currents make its saturation, and this is a positive feedback process, and circuit is thus
Drastically upset is power tube cut-off state, but this state is unsteady state.
Power tube Q133 cut-off after → triode Q134 cut-offs → resistance R133 on electric current be 0, electric capacity C133 starts to put
Electricity, discharge path：Electric capacity C133 positive poles → R132 → Q132 emitter junctions → ground → voltage-stabiliser tube D130 positive poles → voltage-stabiliser tube D130 is born
Pole → electric capacity C133 negative poles, this electric current maintains triode Q132 conductings, during turning on herein, power tube cut-off.
But as electric capacity C133 discharges, triode Q132 will exit saturation and enter amplification region, it will cause triode
Q131 collector potentials gradually rise, and in power tube grid potential elevation process, also electric capacity C132 can be recharged, power
Pipe can enter amplification region weak conducting area, when trigger flow through electric current in resistance R131 when, triode Q134 will be weak current
Amplification, electric capacity C133 can be accelerated to charge, power tube can accelerate to turn on, and this is a strong positive feedback process, and result is delay
Reset powers trigger element 25 drastically overturns the stable state for power tube Q133 conductings.Hereafter, set if generator output voltage is less than
Definite value or voltage regulator temperature are less than overtemperature prote numerical value, then adjuster enters the stable state of normal excitation；If continuous overvoltage or
Continue overtemperature, then after experience electric capacity C133 electric discharge periods (power tube ends during this) each time, of short duration to electric capacity C132
Power tube of short duration conducting can be made during charging, then because triode Q131 base stages persistently receive over-pressed signal or lasting overtemperature
Signal, of short duration conducting burst pulse occurs in power tube, but burst pulse dutycycle is very low (general recommendations is not more than 1%).
During power tube turns on, if emergent power pipe over-current phenomenon avoidance, power tube saturation voltage drop will raise, by anti-
Feed resistance R130 triggering Q131 conductings enter guard mode.
Power supply terminate charging indicator light when, if due to power tube can not thoroughly saturation initiation pre- exciting curent deficiency when,
Too high saturation voltage drop also will trigger " time-delay reset power trigger unit " ingoing power pipe by feedback resistance R130 to be ended
Temporary stable state, herein during temporary stable state, positive source D+/B+ will be increased to, close to storage battery anodic potentials, will then weigh
Circuit recovers the state that power tube thoroughly turns on excitation herein when newly being charged to electric capacity C133, completes to power tube conducting degree
Self diagnosis and Self-resetting process, electrical power generators rotating speed is reduced, this is this one big advantage of circuit.
Embodiment 8
Embodiment of the present invention, which provides the 5th kind, has overheat protection function voltage regulator, its circuit structure such as Figure 15
It is shown, including sampling unit 11, regulator chip A2, temperature of transistor sensing circuit 23, power cell 950 and afterflow unit
16,
Sampling unit connects power positive cathode, and sampling unit is identical with aforementioned structure, and the output end connection of sampling unit is adjusted
Save device chip A2 first input end, temperature of transistor sensing circuit is connected to positive source and the second of regulator chip A2 defeated
Between entering end, regulator chip A2 connection power positive cathodes, the input of regulator chip A2 output end connection power cell
(power tube Q140 grids), negative pole (power tube source electrode) ground connection of power cell, the output end (power tube drain electrode) of power cell
Positive source is connected by afterflow unit, the output end of power cell is used to control exciter current of generator；Work as generator voltage
When adjuster operating temperature exceedes permissible value, temperature of transistor sensing circuit turns on and provides triggering letter to power trigger device unit
It number is set to reduce excitation dutycycle or cut-out exciting current.Voltage management function is controlled by regulator chip A2.
The above embodiment of the present invention circuit structure is relatively simple, defencive function is more perfect, cost is low, is easy to industry
Change, its Social benefit and economic benefit are obvious.
Embodiments of the invention are merely to illustrate technical scheme, are not limitations of the present invention, by equivalent
Replacement and non-creativeness labour income to other embodiment or other combination obtained by embodiment each fall within protection of the present invention
Scope, protection scope of the present invention are defined by the claims.
Claims (8)
- A kind of 1. temperature of transistor sensing circuit, it is characterised in that including：Transistor detection unit and temperature adjustmemt unit, the transistor detection unit have transistor, and the temperature is repaiied Positive unit is temperature adjustmemt resistance, and the emitter junction of the temperature adjustmemt resistance and the transistor is in parallel, for institute State transistor conduction impedance and the relation curve of institute sense ambient temperature is modified.
- 2. a kind of generator voltage controller with overheat protection function, it is characterised in that including the crystalline substance described in claim 1 Body pipe temperature sensing circuit.
- 3. there is overheat protection function voltage regulator as claimed in claim 2, it is characterised in that also include:Sampling unit, threshold cell, oscillating unit, power trigger device unit and afterflow unit,The sampling unit connects power positive cathode, and the output end of sampling unit connects power trigger device unit by threshold cell Input, the temperature of transistor sensing circuit be connected to positive source and the power trigger device unit input it Between, the oscillating unit connects power positive cathode, and the output end of the oscillating unit connects the defeated of the power trigger device unit Enter end, the negative pole ground connection of the power trigger device unit, the output end of the power trigger device unit is connected by afterflow unit Positive source, the output end of the power trigger device unit are used to control exciter current of generator；The power trigger device unit To possess the power D-flip flop of overcurrent protection function, when the generator voltage controller operating temperature exceedes permissible value, The temperature of transistor sensing circuit turns on and providing trigger signal to the power trigger device unit makes it reduce excitation duty Than or cut-out exciting current.
- 4. there is overheat protection function voltage regulator as claimed in claim 2, it is characterised in that also include:Sampling unit, threshold cell, oscillating unit, power trigger device unit and afterflow unit,The sampling unit connects power positive cathode, the second input of the output end connection power trigger device unit of sampling unit End, the temperature of transistor sensing circuit are connected between the second input of positive source and the power trigger device unit, The oscillating unit connects power positive cathode, and the second of the output end connection power trigger device unit of the oscillating unit is defeated Enter end, the threshold cell connection connection power positive cathode, the output end of the threshold cell connects the power trigger device list The first input end of member, the negative pole ground connection of the power trigger device unit, the output end of the power trigger device unit, which passes through, to continue Unit connection positive source is flowed, the output end of the power trigger device unit is used to control exciter current of generator；When the hair When electric moter voltage adjuster operating temperature exceedes permissible value, the temperature of transistor sensing circuit turns on and to the power trigger Device unit, which provides trigger signal, makes it reduce excitation dutycycle or cut-out exciting current.
- 5. there is overheat protection function voltage regulator as claimed in claim 2, it is characterised in that also include:Sampling unit, threshold cell, oscillating unit, power trigger device unit and afterflow unit,The sampling unit connects power positive cathode, the second input of the output end connection power trigger device unit of sampling unit End, the temperature of transistor sensing circuit are connected between the second input of positive source and the power trigger device unit, The oscillating unit connects power positive cathode, and the first of the output end connection power trigger device unit of the oscillating unit is defeated Enter end, the threshold cell is connected between the first end of the power trigger device unit and power cathode (i.e.), the work( The negative pole ground connection of rate flip-flop element, the output end of the power trigger device unit connect positive source, institute by afterflow unit The output end for stating power trigger device unit is used to control exciter current of generator；When the generator voltage controller operating temperature During more than permissible value, the temperature of transistor sensing circuit, which turns on and provides trigger signal to the power trigger device unit, makes it Reduce excitation dutycycle or cut-out exciting current.
- 6. there is the voltage regulator of overheat protection function as claimed in claim 2, it is characterised in that also include:Sampling unit, threshold cell, compare amplifying unit, power cell and afterflow unit,The sampling unit connects power positive cathode, and the output end of sampling unit compares amplifying unit by threshold cell connection Input, the temperature of transistor sensing circuit are connected between positive source and the relatively input of amplifying unit, institute The negative pole ground connection of power trigger device unit is stated, the output end of the power trigger device unit is connecting power supply just by afterflow unit Pole, the output end of the power trigger device unit are used to control exciter current of generator；When the generator voltage controller work When making temperature and exceeding permissible value, the temperature of transistor sensing circuit turns on and provides triggering letter to the power trigger device unit It number is set to reduce excitation dutycycle or cut-out exciting current.
- 7. there is the voltage regulator of overheat protection function as claimed in claim 2, it is characterised in that also include:Sampling unit, threshold cell, time-delay reset power trigger unit and afterflow unit,The sampling unit connects power positive cathode, and the output end of sampling unit connects the time-delay reset work(by threshold cell The input of rate trigger element, the temperature of transistor sensing circuit are connected to positive source and the time-delay reset power trigger Between the input of device unit, the time-delay reset power trigger unit connects power positive cathode, the power trigger device unit Output end positive source is connected by afterflow unit, the output end of the time-delay reset power trigger unit, which is used to control, to generate electricity Machine exciting current；The time-delay reset power trigger unit is the power-type triggering for possessing time-delay reset and overcurrent protection function Device, when the generator voltage controller operating temperature exceedes permissible value, the temperature of transistor sensing circuit turn on and to The power trigger device unit, which provides trigger signal, makes it reduce excitation dutycycle or cut-out exciting current.
- 8. there is the voltage regulator of overheat protection function as claimed in claim 2, it is characterised in that also include:Sampling unit, regulator chip A2, power cell and afterflow unit,The sampling unit connection power positive cathode, the output end connection adjustor chip A2 of sampling unit first input end, The temperature of transistor sensing circuit is connected between positive source and the regulator chip A2 the second input, the tune Device chip A2 connection power positive cathodes are saved, the output end of the regulator chip A2 connects the input of the power cell, institute The negative pole ground connection of power cell is stated, the output end of the power cell connects positive source, the power list by afterflow unit The output end of member is used to control exciter current of generator；When the generator voltage controller operating temperature exceedes permissible value, The temperature of transistor sensing circuit turns on and providing trigger signal to the power trigger device unit makes it reduce excitation duty Than or cut-out exciting current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046363.9A CN107658848A (en) | 2017-11-01 | 2017-11-01 | Temperature of transistor sensing circuit and the voltage regulator with overheat protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046363.9A CN107658848A (en) | 2017-11-01 | 2017-11-01 | Temperature of transistor sensing circuit and the voltage regulator with overheat protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107658848A true CN107658848A (en) | 2018-02-02 |
Family
ID=61095879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711046363.9A Withdrawn CN107658848A (en) | 2017-11-01 | 2017-11-01 | Temperature of transistor sensing circuit and the voltage regulator with overheat protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107658848A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632118A (en) * | 2018-12-20 | 2019-04-16 | 中国电子科技集团公司第四十八研究所 | A kind of CMOS temperature sensing circuit and MEMS temperature sensor system |
| CN111130530A (en) * | 2018-10-31 | 2020-05-08 | 台湾积体电路制造股份有限公司 | Circuit with temperature sensitive component and method for controlling load |
-
2017
- 2017-11-01 CN CN201711046363.9A patent/CN107658848A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130530A (en) * | 2018-10-31 | 2020-05-08 | 台湾积体电路制造股份有限公司 | Circuit with temperature sensitive component and method for controlling load |
| CN109632118A (en) * | 2018-12-20 | 2019-04-16 | 中国电子科技集团公司第四十八研究所 | A kind of CMOS temperature sensing circuit and MEMS temperature sensor system |
| CN109632118B (en) * | 2018-12-20 | 2020-09-18 | 中国电子科技集团公司第四十八研究所 | CMOS temperature sensing circuit and MEMS temperature sensor system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203787935U (en) | Over-current protection circuit based on high side current detection | |
| US10090689B2 (en) | Overcurrent protection circuit and method for limiting discharge current of battery within safety limiting value | |
| CN109638786B (en) | Photovoltaic module turn-off protection circuit and module turn-off device | |
| CN201113523Y (en) | Direct-current input -type charger | |
| US3296516A (en) | Voltage regulator | |
| CN202663092U (en) | Circuit protecting battery against overcharge | |
| CN108039695B (en) | Overvoltage crowbar | |
| CN210327077U (en) | Fast charging circuit and device | |
| CN107658848A (en) | Temperature of transistor sensing circuit and the voltage regulator with overheat protection function | |
| CN108832900A (en) | Operational amplification circuit and its over-current protection method | |
| CN104218531A (en) | Short circuit protecting circuit and method | |
| CN108574323B (en) | Battery charging control circuit | |
| CN208015357U (en) | Temperature of transistor sensing circuit and voltage regulator with overheat protection function | |
| CN106357101A (en) | Active discharge circuit for filter capacitor of electric automobile controller | |
| CN203850820U (en) | Over-temperature detection circuit | |
| CN105406576B (en) | A kind of two-stage energy storage for power supply circuit | |
| CN209029915U (en) | Current-limiting protection circuit based on inverter load short circuits | |
| US8553377B2 (en) | Electronic control device | |
| CN206533118U (en) | Low pressure cut-off protection circuit | |
| CN206947934U (en) | A kind of short-circuit protection circuit and BOOST circuit | |
| CN206638759U (en) | A kind of energy storage inverter short circuit identification circuit | |
| CN112134257A (en) | Short-circuit protection circuit of direct-current power supply | |
| CN206389144U (en) | A kind of BMS charge and discharge controls protection circuit | |
| CN107547020A (en) | Multi-functional B circuit voltages adjuster | |
| CN218213332U (en) | Power generation calibration device of integrated starting and power generation integrated controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180202 |