CN104283472B - Voltage regulator and its excessively low voltage protection circuit - Google Patents
Voltage regulator and its excessively low voltage protection circuit Download PDFInfo
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- CN104283472B CN104283472B CN201310276387.9A CN201310276387A CN104283472B CN 104283472 B CN104283472 B CN 104283472B CN 201310276387 A CN201310276387 A CN 201310276387A CN 104283472 B CN104283472 B CN 104283472B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
- H02P9/305—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices controlling voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/006—Means for protecting the generator by using control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of voltage regulator and its mistake low voltage protection circuit, the voltage regulator is coupled to without between battery generator and earth terminal.Voltage regulator included low voltage protection circuit and exciting curent adjustment unit.Crossing low voltage protection circuit includes voltage detection unit, multiple switch circuit and power switch.Voltage detection unit produces the first control signal according to the output voltage without battery generator.Multiple switch circuit is connected with each other, and is controlled by first control signal.Power switch is coupled to one of the multiple on-off circuit with the magnetizing coil.Exciting curent adjustment unit is to the running according to output voltage control power switch.Whether voltage detection unit detection output voltage is less than threshold value, and exports the first control signal according to testing result, sequentially controls the running of the multiple on-off circuit, is switched with optionally stop power.
Description
Technical field
The present invention is related to a kind of protection circuit, and is used for without storage battery air conditioner motor voltage-regulation system particularly with regard to one kind
The voltage regulator of system and its excessively low voltage protection circuit.
Background technology
Now, mobile carrier (such as automobile, bus etc.) typically has air-conditioner generator and the voltage for having battery generator
Regulating system.It is to be connected with storage battery and can be charged and other electrical equipment on automobile in storage battery is supplied after generating wherein to have battery generator
Equipment is used.Air-conditioner generator is not coupled with storage battery and operating is driven by engine in itself, and is mainly used in maintaining air-conditioning system
The running of system.Air-conditioner generator is not connected with storage battery but is replaced storage battery using capacitive, namely the voltage of air-conditioner generator is adjusted
Section system is without battery voltage regulating system.
When air-conditioner generator occurs exception, such as out-put supply line comes off to form short circuit and cause brownout, because of sky
Motor is readjusted the distribution not coupled with storage battery, so user cannot be informed by the warning lamp of storage battery, therefore, when air-conditioner generator hair
It is raw abnormal when continuing to idle running, gently can then influence the running of air-conditioning system, it is heavy then it may happen that because air-conditioner generator is overheated
Fire and cause to burn the serious problems such as car, increase mobile carrier and unexpected probability occur.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of voltage regulator and its crosses low voltage protection circuit, and it can be in nothing
When battery generator is in abnormality, automatic forced running of the cut-off without battery generator, to prevent to be generated electricity without storage battery
Machine is because overheating the situation for causing to burn car on fire.
Above-mentioned voltage regulator is used to adjust the electricity of the magnetizing coil without battery generator, and voltage regulator includes too low
Voltage protection circuit and exciting curent adjustment unit.Wherein, crossing low voltage protection circuit includes voltage detection unit, Duo Gekai
Powered-down road and power switch.Voltage detection unit is coupled to without battery generator and according to the output voltage without battery generator
The first control signal is produced, and the multiple on-off circuit is controlled by the first control signal.Voltage detection unit detection output
Whether voltage is less than threshold value, and exports the first control signal according to testing result, sequentially controls the multiple on-off circuit
Running, optionally to end the power switch.
Exciting curent adjustment unit is coupled to power switch, and to according to the output voltage control work(without battery generator
The conducting of rate switch and deadline, to control the electric current of magnetizing coil.
The embodiment of the present invention separately provides one kind and crosses low voltage protection circuit, and this crosses low voltage protection circuit and is coupled to without storage battery
Between generator and earth terminal.Crossing low voltage protection circuit includes voltage detection unit, multiple switch circuit and power switch.
Voltage detection unit is coupled to without battery generator, and produces the first control signal according to the output voltage without battery generator.
The multiple on-off circuit is respectively coupled between the magnetizing coil without battery generator and earth terminal.The multiple on-off circuit
Also it is controlled by the first control signal.Power switch is respectively coupled to one of the multiple on-off circuit with swashing without battery generator
Magnetic coil.
In one of embodiment of the invention, said switching circuit include first switch circuit, second switch circuit with
And the 3rd on-off circuit.First switch circuit is respectively coupled to magnetizing coil and earth terminal.First switch circuit is controlled by first
Control signal.Second switch circuit is respectively coupled to magnetizing coil and earth terminal.Second switch circuit is coupled to first switch electricity
Road.3rd on-off circuit is coupled to second switch circuit and power switch.
In one of embodiment of the invention, when voltage detection unit detection output voltage is less than threshold value, voltage
Detection unit exports the first control signal, first switch circuit turn-on is produced the second control signal, ends second switch circuit
Running and turn on the 3rd on-off circuit, with stop power switch running；When voltage detection unit detection output voltage is higher than
During threshold value, voltage detection unit exports the first control signal cut-off first switch circuit, and it is defeated to operate second switch circuit
Go out the 3rd control signal, to end the running of the 3rd on-off circuit, maintain the running of the power switch.
The embodiment of the present invention separately provides a kind of automobile-used voltage-regulating system, at least including two voltage-regulating systems, wherein
One of be without storage battery air conditioner motor voltage-regulating system comprising above-mentioned voltage regulator.
In sum, the embodiment of the present invention provides a kind of voltage regulator and its crosses low voltage protection circuit, by multiple
Sequence switch controls circuit in after a period of time, and pressure ends the running without battery generator.Accordingly, voltage regulator and its mistake
Low voltage protection circuit can effectively prevent from causing the situation for burning car to occur because overheat is on fire without battery generator.
Be further understood that the feature and technology contents of the present invention to enable, refer to below in connection with it is of the invention specifically
Bright and accompanying drawing, but these explanations are only used for illustrating the present invention with institute's accompanying drawings, rather than any is made to interest field of the invention
Limitation.
Brief description of the drawings
Fig. 1 is the functional block diagram without storage battery air conditioner motor voltage-regulating system provided in an embodiment of the present invention.
Fig. 2 is the thin portion circuit diagram of voltage regulator provided in an embodiment of the present invention.
Fig. 3 is the functional block diagram of automobile-used voltage-regulating system provided in an embodiment of the present invention.
Wherein, description of reference numerals is as follows：
1：Without storage battery air conditioner motor voltage-regulating system
11、21：Voltage regulator
110：Cross low voltage protection circuit
111：Voltage detection unit
113：Control unit
1131：First switch circuit
1132：Second switch circuit
1133：3rd on-off circuit
115：Power switch
120：Exciting curent adjustment unit
13、23：Air-conditioner generator
131、231：Magnetizing coil
233：Stator coil
235：Rectification unit
15、25：Load unit
CB：Electric capacity
RB：Resistance
RL：Load
2：Automobile-used voltage-regulating system
27：There is battery generator
29：Storage battery
SW1：Switch element
D1、D2：Diode
EXC：Excitatory end
F+：The positive terminals in magnetic field
F-：Bear terminals in magnetic field
B+：Power end
G、GND：Earth terminal
R1~R7：Resistance
ZD1、ZD2、ZD3：Voltage-regulator diode
C1、C2：Electric capacity
Q1、Q4：Power transistor
Q2, Q3A, Q3B, Q5A, Q5B transistor
V+：Input voltage
Specific embodiment
Main spirits of the present invention are providing a kind of voltage regulator for having under-voltage protection mechanism, and this voltage regulator
It is applied to without battery generator voltage-regulating system.Therefore the part that the framework and non-invention of generator are focused on, and it is affiliated
Technical field tool usually intellectual should know the framework and operation principles of generator, therefore not repeat herein, and only sketch with
Related part of the invention.In the present invention without battery generator illustrated by taking air-conditioner generator as an example, but the present invention not with
This is limited.
(being applied to the embodiment without storage battery air conditioner motor voltage-regulating system)
Fig. 1 illustrates the functional block diagram without storage battery air conditioner motor voltage-regulating system provided in an embodiment of the present invention.Such as Fig. 1
It is shown, include voltage regulator 11, air-conditioner generator 13 and load unit 15 without storage battery air conditioner motor voltage-regulating system 1.
Voltage regulator 11 is coupled to air-conditioner generator 13 and load unit 15.
Voltage regulator 11 can be by controlling to adjust the electric current of the magnetizing coil (not being illustrated in Fig. 1) of air-conditioner generator 13
Measure to adjust the generating voltage of air-conditioner generator 13, to maintain the running of load unit 15.Voltage regulator 11 simultaneously can be in air-conditioning
There is exception in generator 13, such as when cannot set up voltage or too low generated energy, force the running of cut-off air-conditioner generator 13, with
Protection air-conditioner generator 13.
Air-conditioner generator 13 is connected with there is battery voltage regulating system by an external switch (not illustrating).Air-conditioning generates electricity
Machine 13 can have idle running with the two kinds of operating modes that generate electricity.(open) pattern is disconnected when external switch is in, namely external switch is not
When being activated, air-conditioner generator 13 can be in idle mode because engine operating drives, namely air-conditioner generator 13 is operated but not
Generate electricity.When external switch is in (close) pattern of closing, namely external switch is unlocked when turning on, and air-conditioner generator 13 is meeting
Reception has the exciting curent of battery generator offer and starts to generate electricity.Air-conditioner generator 13 can be by the outside excitatory electricity for providing
Stream, starts to generate electricity in separate excitation mode.
In the present embodiment, load unit 15 (is not illustrated in figure comprising a capacity cell (not being illustrated in Fig. 1) and a load
1), wherein capacity cell is in parallel with load.Capacity cell can be used to be provided through voltage regulator 11 after air-conditioner generator 13 generates electricity
Exciting curent is to air-conditioner generator 13.Additionally, the voltage that capacity cell is produced after separately may be used to generate electricity air-conditioner generator 13 enters
Row voltage stabilizing and filtering.It is, after the output voltage that the running of air-conditioner generator 13 is produced can be through capacity cell filtering noise information voltage stabilizing,
It is available to load.Load the element of the electric power for the consumption running output of air-conditioner generator 13, for example, fan or air-conditioning equipment
Deng.
Voltage regulator 11 included low voltage protection circuit 110 and exciting curent adjustment unit 120.Cross low-voltage guarantor
Protection circuit 110 is coupled to exciting curent adjustment unit 120.
Cross low voltage protection circuit 110 and further include voltage detection unit 111, control unit 113 and power switch
115.Voltage detection unit 111 couples load unit 15 and control unit 113.Control unit 113 couples power switch 115.Work(
Rate switch 115 is coupled between exciting curent adjustment unit 120 and air-conditioner generator 13.Power switch 115 separately generates electricity with air-conditioning
The magnetizing coil (not illustrating) of machine 13 is serially connected.
And control unit 113 also includes first switch circuit 1131, the on-off circuit of second switch circuit 1132 and the 3rd
1133.First switch circuit 1131 is coupled between voltage detection unit 111 and second switch circuit 1132.3rd on-off circuit
1133 are coupled between second switch circuit 1132 and power switch 115.
Whether voltage detection unit 111 is used to detect the output voltage of air-conditioner generator 13 less than threshold value, and according to inspection
Survey the running of output control control unit 113.Voltage detection unit 111 can export the first control signal sequentially according to testing result
The running of drive control first switch circuit 1131, the on-off circuit 1133 of second switch circuit 1132 and the 3rd, selects according to this
Property ground stop power switch.
And exciting curent adjustment unit 120 can be under the normal power generation of air-conditioner generator 13, according to detecting air-conditioner generator
13 output voltage just adjusts the on or off time of power switch 115.In other words, exciting curent adjustment unit 120
Can be by adjusting power switch 115 in the ratio of on or off time work period, adjustment flows through air-conditioner generator 13
The electric current of magnetizing coil, to control air-conditioner generator 13 to operate the generated energy for producing.
When air-conditioner generator 13 starts to generate electricity, and during exciting curent 120 conducting power switch 115 of adjustment unit (namely work as
After external switch is opened), voltage detection unit 111 is understood when the output voltage for detecting air-conditioner generator 13 is less than threshold value,
Judge that air-conditioner generator 13 occurs abnormal and exports the first control signal conducting first switch circuit 1131, so that first switch is electric
Road 1131 exports the running of the second control signal cut-off second switch circuit 1132, and turns on the 3rd on-off circuit 1133, to cut
The only running of power switch 115.So as to control unit 113 can switch 115 by forcing stop power, cut-out exciting curent
Path, to close air-conditioner generator 13.
Additionally, under the normal power generation of air-conditioner generator 13, exciting curent adjustment unit 120 can be according to air-conditioner generator 13
Output voltage, accordingly adjusts conducting and the deadline of power switch 115.
In under the normal power generation of air-conditioner generator 13, when exciting curent adjustment unit 120 detects the defeated of air-conditioner generator 13
When going out overtension, exciting curent adjustment unit 120 can increase deadline of the power switch 115 in a work period, to drop
The electric current of low magnetizing coil, and then reduce the output voltage of air-conditioner generator 13；When exciting curent adjustment unit 120 detects sky
Readjust the distribution motor 13 output voltage it is too low when, exciting curent adjustment unit 120 can increase power switch 115 in a work period
ON time, to increase the electric current of magnetizing coil, and then lifts the output voltage that air-conditioner generator 13 is produced.
For example, so that 28 volts without storage battery air conditioner motor voltage-regulating system as an example, threshold value is, for example, 22 volts.When
When voltage detection unit 111 detects the output voltage after air-conditioner generator 13 generates electricity less than 22 volts, the first control can be exported
Signal (for example, signal of high-voltage level) is sequentially driven the first switch circuit 1131, second switch in control unit 115
The conducting of the on-off circuit 1133 of circuit 1132 and the 3rd is operated with cut-off, makes the 3rd on-off circuit 1133 force stop power to be opened
Close 115 running.
Conversely, when it is higher than 22 volts that voltage detection unit 111 detects the output voltage after air-conditioner generator 13 generates electricity,
The signal of the first control signal for example, low voltage level can then be exported) it is sequentially driven first holding in control control unit 115
Powered-down road 1131, the conducting of the on-off circuit 1133 of second switch circuit 1132 and the 3rd and cut-off are operated, and make the 3rd switch electricity
Road 1133 does not interfere with the running of power switch 115.Now, the running of power switch 115 is by exciting curent adjustment unit 120
Accordingly adjusted according to the output voltage of air-conditioner generator 13.
Accordingly, voltage regulator of the invention 11 can be by the output voltage of active detecting air-conditioner generator 13, and in sky
When readjusting the distribution motor 13 and occurring abnormal, for example, cause short circuit because out-put supply line comes off, the operating of positive closing air-conditioner generator 13.
So as to voltage regulator 11 can protect air-conditioner generator 13, and avoid air-conditioner generator 13 from burning car because overheating generation on fire
Problem.
One is done below for the specific embodiment and function mode for being applied to the voltage regulator without battery generator
Explanation.Voltage regulator 11 is, for example, five-line voltage regulator, refer to Fig. 2, and it has excitatory end EXC, the positive wiring in magnetic field
End F+, the negative terminals F- in magnetic field, power end B+ and earth terminal GND.Power end B+ couples load unit 15.Excitatory end EXC warps
One external switch SW1 is coupled by diode D2, to receive an input voltage V+ and an excitatory electricity when external switch SW1 is turned on
Stream.The positive terminals F+ in magnetic field is coupled to the first end of the magnetizing coil 131 of air-conditioner generator (not being illustrated in Fig. 2).Magnetic field is negative to be connect
Line end F- is coupled to the second end of magnetizing coil 131.
The first end of external switch SW1 can be coupled to the voltage regulator of battery generator (not being illustrated in Fig. 2)
Storage battery (not being illustrated in Fig. 2) in system.Second end of external switch SW1 couples the anode of diode D2.The moon of diode D2
Pole is coupled to excitatory end EXC.Accordingly, diode D2 can be drawn exciting curent by excitatory end EXC when external switch SW1 is turned on
Enter, drive magnetizing coil 131 excitatory with through the positive terminals F+ in magnetic field, to produce field drives air-conditioner generator to generate electricity.
Load unit 15 includes load RL, resistance RB and electric capacity CB.Load RL represents consumption air-conditioner generator output electricity
Electronic component of power, for example, fan or air-conditioning equipment etc., wherein in practice, load RL is when external switch SW1 is opened
Just exist.The first end of electric capacity CB is coupled to the power end B+ of voltage regulator 11, and second end of electric capacity CB is coupled to earth terminal
GND.Resistance RB is in parallel with electric capacity CB, during to (being 0 as loaded RL) in an unloaded situation, there is provided a discharge path is to electricity
Hold CB.RL is in parallel with electric capacity CB for load.The output voltage of the parallel circuit for air-conditioner generator of electric capacity CB and resistance RB, has
Filtering and voltage stabilizing effectiveness.
The power switch 115 crossed in low voltage protection circuit 110 has input, output end and control end.Power is opened
The anode of 115 input coupling flywheel diode D1 is closed, its output end is coupled to earth terminal GND, and its control end is respectively coupled to
In the on-off circuit 1133 of exciting curent adjustment unit 120 and the 3rd.In the present embodiment, power switch 115 is with power transistor
Q1 is realized.The grid of power transistor Q1 is coupled to the on-off circuit 1133 of exciting curent adjustment unit 120 and the 3rd, its source electrode
Earth terminal GND is coupled to, its drain electrode is coupled to the anode of flywheel diode D1.Accordingly, exciting curent adjustment unit 120 can pass through
Conducting and deadline of the grid voltage regulation power switch 115 of control power transistor Q1 in a work period, to adjust
The magnitude of current of magnetizing coil.
Voltage detection unit 111 includes bleeder circuit, voltage detector component and first switch.Bleeder circuit includes resistance
R1、R2；Voltage detector component includes voltage-regulator diode ZD1；First switch includes transistor Q2.First switch may also include resistance
R3 is coupled between the base stage of transistor Q2 and emitter-base bandgap grading.
The first end of resistance R1 is coupled to earth terminal GND, and second end of resistance R1 is coupled to the first end of resistance R2.Resistance
Second end of R2 is then coupled to power end B+ and exciting curent adjustment unit 120.The negative electrode coupling resistance R1 of voltage-regulator diode ZD1
With the node between resistance R2, and the anode of voltage-regulator diode ZD1 is coupled to the base stage of transistor Q2.The collector coupling of transistor Q2
First switch circuit 1131, its emitter-base bandgap grading is coupled to earth terminal GND.
Bleeder circuit is used to capture the voltage (namely output voltage of correspondence air-conditioner generator) of power end B+, for voltage stabilizing
Whether diode ZD1 judges the voltage of power end B+ less than threshold value.When the voltage of power end B+ is more than threshold value, voltage stabilizing two
Pole pipe ZD1 conductings make transistor Q2 export the first switch circuit 1131 that the first control signal ends control unit 113 in collector.
When power end B+ voltage be less than threshold value when, voltage-regulator diode ZD1 be in cut-off state, now, transistor Q2 cut-off and in
Collector exports the first switch circuit 1131 that the first control signal turns on control unit 113.
Additionally, the specification of the resistance value of resistance R1 and resistance R2 and voltage-regulator diode ZD1 can be according to threshold value come
Selection design.
First switch circuit 1131 includes resistance R4, R5, voltage-regulator diode ZD2, electric capacity C1 and second switch and the 3rd
Switch, wherein second switch include transistor Q3A, and the 3rd switch includes transistor Q3B；Second switch circuit 1132 includes electricity
Resistance R6, R7, electric capacity C2, the switches of voltage-regulator diode ZD3 and the 4th, wherein the 4th switch includes power transistor Q4；3rd opens
Powered-down road 1133 includes the 5th switch and the 6th switch, wherein the 5th switch includes transistor Q5A and the 6th switchs and includes crystal
Pipe Q5B.
The first end of resistance R4 is coupled to excitatory end EXC, and second end of resistance R4 is coupled to the moon of voltage-regulator diode ZD2
Pole.The anode of voltage-regulator diode ZD2 is coupled to the first end of electric capacity C1.The grounded end GND ground connection in second end of electric capacity C1.Change speech
It, resistance R4, voltage-regulator diode ZD2 and electric capacity C1 are series between excitatory end EXC and earth terminal GND.Voltage-regulator diode ZD2
Anode and the first end of electric capacity C1 between node be coupled to the collector of transistor Q2 and the base stage of transistor Q3B.
Voltage-regulator diode ZD2 is used to avoid transistor Q3B from making by mistake in the trace voltage of idle running generation because of air-conditioner generator
It is dynamic.Separately, resistance R4 and electric capacity C1 contact the ON time to form a circuit to delay crystal pipe Q3B, and meet transistor Q3B
The first control signal to enable is received after conducting after a period of time.
The first end of resistance R5 is coupled to excitatory end EXC, second end of resistance R5 be respectively coupled to the emitter-base bandgap grading of transistor Q3A with
The collector of transistor Q3B.Resistance R5 is series between excitatory end EXC and the collector of Q3B, to control to flow through crystalline substance by excitatory end EXC
The electric current of body pipe Q3B.The emitter-base bandgap grading of transistor Q3A is electrical connected with base stage and is coupled to the collector of transistor Q3B.Transistor
The emitter-base bandgap grading of Q3B is coupled to earth terminal GND.The collector of transistor Q3A then couples the power transistor Q4 of second switch circuit 1132
Grid, to export the second control signal on or off power transistor Q4.The base emitter base diode circuit running of transistor Q3A is equivalent
In a diode, the second control signal that the transistor Q3B of first switch circuit 1131 can be produced according to the first control signal
Exported to power transistor Q4 through collecting emitter-base bandgap grading end.During actual operation, transistor Q3A can pull up power when transistor Q3B ends
The grid voltage of transistor Q4, with conducting power transistor Q4, conversely, transistor Q3A is when transistor Q3B is turned on, it is right to stop
Electric capacity C2 is charged, and power transistor Q4 will be closed when its grid voltage is less than certain value.
The drain electrode of power transistor Q4 is coupled to excitatory end EXC through resistance R7.The source electrode of power transistor Q4 is coupled to and connects
Ground terminal GND.The grid of power transistor Q4 such as aforementioned controlled is in the second control signal of the collection emitter-base bandgap grading output of transistor Q3A.Surely
The grid of the negative electrode coupling power transistor Q4 of pressure diode ZD3, its anode coupling earth terminal GND.Voltage-regulator diode ZD3 is coupled
Between grid, source electrode in power transistor Q4, to when power transistor Q4 is turned on, firm power transistor Q4 grid source electrodes
Voltage.The first end of resistance R6 is coupled to the grid of transistor Q4, and second end of resistance R6 couples earth terminal GND.Electric capacity C2's
The grid of first end coupling power transistor Q4, its second end couples earth terminal GND.Resistance R6 formation one in parallel with electric capacity C2 is put
Electrical circuit, is used to extend the ON time of power transistor Q4.Resistance R6 and electric capacity C2 can be in the second control signal stop power
After a period of time of transistor Q4, power transistor Q4 is set to end running.The parallel circuit of resistance R6 and electric capacity C2 is separately and voltage stabilizing
Diode ZD3 is parallel with one another.
The base stage of transistor Q5A is mutually coupled with emitter-base bandgap grading, and is separately coupled to grid (the i.e. power switch of power transistor Q1
Control end).The collector of the collector of transistor Q5A then coupling transistors Q5B.The emitter-base bandgap grading coupling earth terminal GND of transistor Q5B.
And the drain electrode of the base stage coupling power transistor Q4 of transistor Q5B, and it is controlled by power transistor Q4.Accordingly, second switch electricity
Road 1132 can export the running that the 3rd control signal controls the 3rd on-off circuit 1133, namely selectivity by power transistor Q4
The running of ground on or off transistor Q5B.Transistor Q5A can optionally stop power be brilliant according to the running of transistor Q5B
The running of body pipe Q1.
Power transistor Q4 in the present embodiment is closed in air-conditioner generator in the present embodiment in external switch SW1
(close) turn on moment, can prior to transistor Q3B conducting, with the running of "off" transistor Q5B, it is to avoid power transistor Q1 because
Air-conditioner generator dally or start generate electricity when, the voltage of power end B+ it is low and by transistor Q5A, Q5B positive closing.
In the present embodiment, the charging interval of electric capacity C1 is controlled by the capacitance of electric capacity C1 with the resistance value of resistance R4.Work as electricity
When appearance C1 charges electricity, i.e., transistor Q3B can be turned on, and export the second control signal of low voltage level to power transistor Q4's
Grid, with the grid voltage of drop-down power transistor Q4.
When electric capacity C2 is discharged through resistance R6, power transistor Q4 is to decommission.The discharge time of electric capacity C2 is logical
The capacitance for crossing design configurations electric capacity C2 is controlled with the resistance value of resistance R6.After power transistor Q4 cut-offs, can be in power
The drain electrode of transistor Q4 exports the 3rd control signal conducting transistor Q5B, then forces the running of stop power transistor Q1, enters
And the running of positive closing air-conditioner generator.In short, when air-conditioner generator cannot allow sky in Preset Time in such as 3 to 4 seconds
Electric power generation is readjusted the distribution, voltage regulator 11 can turn on the 3rd road the last 1133 for switching by ending second switch circuit 1132
The running of stop power transistor Q1 processed, so positive closing air-conditioner generator running.In other words, when air-conditioner generator is opened
Electricity is originated, if the voltage of power end B+ is not more than Preset Time less than the time of threshold value, air-conditioner generator still can normal work
Operate；If conversely, when the voltage of power end B+ exceedes Preset Time less than the time of threshold value, voltage regulator 11 i.e. can be strong
The running of stop power transistor Q1 processed, until can just recover normal work to electricity in external switch SW1 again switched conductive.
Preset Time can be set by the charging interval of design capacitance C1 with the summation of the discharge time of electric capacity C2, power
Transistor Q4 can be realized by NMOS power metal-oxide-semiconductor field-effect transistors, transistor Q1, Q2, Q3A, Q3B, Q5A
And Q5B can be NPN bipolar transistors, the present invention is not limited with above-mentioned certainly, in the technical field of the invention tool
Usually intellectual can the appropriate alternative elements type of unrestricted choice or specification.
Additionally, voltage detection unit 111 can be realized by comparator, for example, the first input end of comparator is (for example
Positive input terminal) coupling power end B+, and second input (such as negative input end) of comparator coupling reference voltage V_REF.Than
Compared with the base terminal of the output end coupling transistors Q2 of device.Accordingly, comparator can be according to the voltage of power end B+ and reference voltage V_REF
Comparative result, correspondence output the first control signal, with or off first switch circuit 1131.
Another offer voltage regulator of the invention is applied to the implementation method of automobile-used voltage-regulating system.Refer to Fig. 3, this reality
The automobile-used voltage-regulating system 2 for applying example at least includes two voltage-regulating systems, and one of them is have storage battery to press regulating system, separately
One is to press regulating system without storage battery.It is without storage battery air conditioner motor voltage-regulating system without battery voltage regulating system, it includes
Voltage regulator 21, air-conditioner generator 23 and load unit 25.There is battery voltage regulating system to include battery generator 27
With storage battery 29, wherein have battery generator 27 couple storage battery 29.Air-conditioner generator 23 includes magnetizing coil 231, stator coil 233
And rectification unit 235, wherein stator coil 233 coupling rectification unit 235.Load unit 25 include electric capacity CB, resistance RB with
Load the parallel circuit of RL.
The excitatory end EXC of voltage regulator 21 couples storage battery 29 through diode D2, external switch SW1, to receive storage battery 29
The exciting curent of offer.Excitatory end EXC couples air-conditioner generator 23, and the positive terminals F+ in magnetic field is coupled to the of magnetizing coil 231
One end, the negative terminals F- in magnetic field is coupled to the second end of magnetizing coil 231, and power end B+ coupling load units 25 generate electricity with air-conditioning
Machine 23, earth terminal GND ground connection.Voltage regulator 21 can be the five-line voltage regulator of previous embodiment, and load RL is wind
Fan and air-conditioning equipment etc..
As shown in figure 3, when external switch SW1 is turned on, magnetizing coil 231 can be through the excitatory end EXC of voltage regulator 21
The exciting curent that storage battery 29 is provided is received, is generated electricity with starting the running of air-conditioner generator 23, sky is then controlled by voltage regulator 21
Readjust the distribution the output voltage of motor 23.
When voltage regulator 21 judge air-conditioner generator 23 can normal power generation when, voltage regulator 21 can be flowed through by adjustment
The exciting curent of excitatory end EXC, the positive terminals F+ in magnetic field, magnetizing coil 231 terminals F- negative with magnetic field carrys out management and control stator coil
233 conducting electric current.Meanwhile, voltage regulator 21 and can adjust air-conditioner generator 23 output voltage be supplied to load RL.
When voltage regulator 21 judges that air-conditioner generator 23 occurs exception, i.e., cannot just hall generate electricity when, voltage regulator 21
Can be by force disconnect by swashing that excitatory end EXC, the positive terminals F+ in magnetic field, the terminals F- negative with magnetic field of magnetizing coil 231 are formed
Magnetic-path, to end the running of air-conditioner generator 23.Accordingly, air-conditioner generator 23 can be avoided to overheat the feelings for causing to burn car on fire
Condition occurs.
In another embodiment, voltage regulator 21 can be integrated in a chip, and the chip at least has five terminals, namely
Power end B+, excitatory end EXC, the positive terminals F+ in magnetic field, the negative terminals F- and earth terminal GND in magnetic field, in using herein, air-conditioning
The output voltage detection mode of generator 23 can be write by firmware with operating control mode and/or hardware circuit design mode come
Implement, the present embodiment is not intended to limit.
The foregoing is only embodiments of the present invention, itself and be not used to limit to the present invention the scope of the claims.
Claims (14)
1. a kind of voltage regulator, is used to adjust the electricity of a magnetizing coil without battery generator, it is characterised in that the electricity
Pressure adjuster includes：
One crosses low voltage protection circuit, is coupled to this without between battery generator and an earth terminal, and this crosses under-voltage protection electricity
Road includes：
One voltage detection unit, is coupled to this without battery generator, and one is produced according to the output voltage without battery generator
First control signal；
Multiple switch circuit, is respectively coupled between the magnetizing coil without battery generator and the earth terminal, the multiple
On-off circuit is simultaneously controlled by first control signal；And
One power switch, is respectively coupled to one of the multiple on-off circuit with the magnetizing coil without battery generator；With
And
One exciting curent adjustment unit, is coupled to the power switch, and to according to the output voltage control power switch
Conducting and deadline, to control the electric current of the magnetizing coil；
Wherein when this starts to generate electricity without battery generator in separate excitation mode, the exciting curent adjustment unit turns on the power and opens
Close, if the voltage detection unit detects the output voltage less than a threshold value, the voltage detection unit is exported according to testing result
First control signal, sequentially controls the running of the multiple on-off circuit, and judge the output in the multiple on-off circuit
When voltage is less than the time of the threshold value more than a Preset Time, the multiple on-off circuit ends the power switch.
2. voltage regulator as claimed in claim 1, wherein the multiple on-off circuit includes：
One first switch circuit, is respectively coupled to the magnetizing coil and the earth terminal, and the first switch circuit be controlled by this
One control signal；
One second switch circuit, is respectively coupled to the magnetizing coil and the earth terminal, the second switch circuit be also coupled to this first
On-off circuit；
One the 3rd on-off circuit, is coupled to the earth terminal, and the 3rd on-off circuit is further coupled to the second switch circuit and the work(
Between rate switch；And
Wherein when the voltage detection unit detect the output voltage be less than the threshold value when, the voltage detection unit export this first
Control signal, makes the first switch circuit turn-on produce one second control signal, ends the running of the second switch circuit and leads
Logical 3rd on-off circuit, to end the running of the power switch.
3. voltage regulator as claimed in claim 2, wherein when the voltage detection unit detects that the output voltage is higher than the door
During limit value, the voltage detection unit exports first control signal and ends the first switch circuit, and makes the second switch circuit
Running output one the 3rd control signal, to end the running of the 3rd on-off circuit, and make the exciting curent adjustment unit according to
The conducting of the output voltage control power switch and deadline.
4. voltage regulator as claimed in claim 3, wherein when the first switch circuit turn-on exports second control signal
To end during the second switch circuit, the second switch circuit is in cut-off running after a Preset Time.
5. voltage regulator as claimed in claim 2, wherein voltage detection unit includes：
One bleeder circuit, including：
One first resistor element, its first end is coupled to the earth terminal；And
One second resistance element, its first end is coupled to the second end of the first resistor element, the second of the second resistance element
End is coupled to this without battery generator；
One voltage detector component, the first end of the voltage detector component is coupled to the first end of the first resistor element, to detect
The output voltage；And
One first switch, with a first input end, one first output end, one first control end, first output end is coupled to
The earth terminal, first control end is coupled to the second end of the voltage detector component；
Wherein the voltage detector component drives the first switch to produce first control in the first input end according to the output voltage
Signal processed.
6. voltage regulator as claimed in claim 5, wherein first switch circuit includes：
One second switch, with one second input, one second output end, one second control end, second input is coupled to
The magnetizing coil, second control end is coupled to second input；And
One the 3rd switch, with one the 3rd input, one the 3rd output end, one the 3rd control end, the 3rd input is coupled to
The magnetizing coil, the 3rd output end is coupled to the earth terminal, and the 3rd control end is coupled to the first input end, should with basis
First control signal makes the second switch produce second control signal in second output end.
7. voltage regulator as claimed in claim 6, wherein second switch circuit includes：
One the 4th switch, with one the 4th input, one the 4th output end, one the 4th control end, the 4th input is coupled to
The magnetizing coil, the 4th output end is coupled to the earth terminal, and the 4th control end is coupled to second output end, should with basis
Second control signal produces the 3rd control signal in the 4th input.
8. voltage regulator as claimed in claim 1, wherein power switch is connected with the magnetizing coil.
9. voltage regulator as claimed in claim 1, the wherein voltage detection unit couple a load unit, the load unit
Including：
One load；
One first capacity cell, the first end of first capacity cell is coupled to this without battery generator and the voltage detecting list
Unit, the second end of first capacity cell is coupled between the earth terminal, and first capacity cell is in parallel with the load；And
One first releases element, in parallel with first electric capacity.
10. a kind of to cross low voltage protection circuit, without between battery generator and an earth terminal, this is transported without battery generator for coupling one
The generated energy that row is produced is controllable by an exciting curent adjustment unit, it is characterised in that this crosses low voltage protection circuit includes：
One voltage detection unit, is coupled to this without battery generator, and one is produced according to the output voltage without battery generator
First control signal；
Multiple switch circuit, is respectively coupled between the magnetizing coil without battery generator and the earth terminal, the multiple
On-off circuit is simultaneously controlled by first control signal；And
One power switch, is respectively coupled to one of the multiple on-off circuit with the magnetizing coil without battery generator；
Wherein when this starts to generate electricity without battery generator in separate excitation mode, the exciting curent adjustment unit turns on the power switch
When, if the voltage detection unit detects the output voltage less than a threshold value, the voltage detection unit is simultaneously defeated according to testing result
Go out first control signal, sequentially control the running of the multiple on-off circuit, and judge that this is defeated in the multiple on-off circuit
When going out time of the voltage less than the threshold value more than a Preset Time, the multiple on-off circuit ends the power switch.
11. low voltage protection circuits excessively as claimed in claim 10, wherein the multiple on-off circuit also includes：
One first switch circuit, is respectively coupled to the magnetizing coil without battery generator and the earth terminal, and this first is opened
Powered-down road is controlled by first control signal；
One second switch circuit, is respectively coupled to the magnetizing coil and the earth terminal, and the second switch circuit and is coupled to this
First switch circuit；And
One the 3rd on-off circuit, couples between the second switch circuit and the power switch；
Wherein when the voltage detection unit detect the output voltage be less than the threshold value when, the voltage detection unit export this first
Control signal, makes the first switch circuit turn-on produce one second control signal, ends the running of the second switch circuit and leads
Logical 3rd on-off circuit, to end the running of the power switch.
12. low voltage protection circuits excessively as claimed in claim 11, wherein when the voltage detection unit detects the output voltage
During higher than the threshold value, the voltage detection unit exports first control signal and ends the first switch circuit, and make this second
On-off circuit running one the 3rd control signal of output, to end the running of the 3rd on-off circuit, maintains the fortune of the power switch
Make.
13. it is as claimed in claim 11 cross low voltage protection circuits, wherein when the first switch circuit turn-on export this second
To end during the second switch circuit, the second switch circuit is in cut-off running after a Preset Time to control signal.
14. low voltage protection circuits excessively as claimed in claim 10, wherein power switch is connected with the magnetizing coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310276387.9A CN104283472B (en) | 2013-07-03 | 2013-07-03 | Voltage regulator and its excessively low voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310276387.9A CN104283472B (en) | 2013-07-03 | 2013-07-03 | Voltage regulator and its excessively low voltage protection circuit |
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| Publication Number | Publication Date |
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| CN104283472A CN104283472A (en) | 2015-01-14 |
| CN104283472B true CN104283472B (en) | 2017-06-20 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017201214A1 (en) * | 2016-05-17 | 2017-11-23 | Texas Instruments Incorporated | Generating the under voltage protection threshold |
| CN110120652A (en) * | 2019-05-30 | 2019-08-13 | 宁波奥克斯电气股份有限公司 | A kind of method, system and air conditioner for preventing power down from accidentally protecting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2664278Y (en) * | 2003-10-31 | 2004-12-15 | 上海新华电子设备有限公司 | DC/DC power supply module having under-voltage and current-limiting protection |
| CN101109971A (en) * | 2006-07-18 | 2008-01-23 | 精工电子有限公司 | Voltage regulator |
| CN101577445A (en) * | 2008-05-07 | 2009-11-11 | 环隆电气股份有限公司 | Adjustable voltage regulation circuit and operating method thereof |
-
2013
- 2013-07-03 CN CN201310276387.9A patent/CN104283472B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2664278Y (en) * | 2003-10-31 | 2004-12-15 | 上海新华电子设备有限公司 | DC/DC power supply module having under-voltage and current-limiting protection |
| CN101109971A (en) * | 2006-07-18 | 2008-01-23 | 精工电子有限公司 | Voltage regulator |
| CN101577445A (en) * | 2008-05-07 | 2009-11-11 | 环隆电气股份有限公司 | Adjustable voltage regulation circuit and operating method thereof |
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| CN104283472A (en) | 2015-01-14 |
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