CN85106149A - Voltage regulator for generator and control method thereof - Google Patents
Voltage regulator for generator and control method thereof Download PDFInfo
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- CN85106149A CN85106149A CN 85106149 CN85106149A CN85106149A CN 85106149 A CN85106149 A CN 85106149A CN 85106149 CN85106149 CN 85106149 CN 85106149 A CN85106149 A CN 85106149A CN 85106149 A CN85106149 A CN 85106149A
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- temperature
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- control
- environment temperature
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- Control Of Eletrric Generators (AREA)
Abstract
In this generator voltage regulator, in order to be no more than the junction temperature limiting value of rectifying device, to adopt by generator output voltage and voltage adjuster environment temperature and control the rectifying device that this and generator field coil are in series.
Description
The present invention relates to the voltage adjuster that a generator is used, specially refer to voltage adjuster into the alternating current generator of automobile storage battery charging usefulness.
For making storage battery capacity charging, the voltage that requires generator is at low temperatures than higher, and at high temperature lower.As everyone knows, technically, for automobile storage battery charging voltage adjuster with alternating current generator, hope can by environment temperature change control with sustaining voltage steady.
For example, a method of being introduced in the United States Patent (USP) U.S.PNo.3718849 specification has proposed by the adjustment voltage that changes voltage adjuster at voltage adjuster place thermometric degree.
In above-mentioned prior art, measure the temperature around the adjuster place in order to change adjuster voltage.Yet in this case, have only when the ambient temperature that detects when higher, the side makes and adjusts voltage and reduce.This is because the purpose of above method is to satisfy the requirement of charge in batteries characteristic and electrical load (motor, speed setting controller or the like) characteristic.But the field supply of self-excited dynamo is provided by following formula when 100% duty ratio:
IF＝ (V
S-V
F)/(R
F)
IF represents field supply (peace), V in the formula
SVoltage (volt), V are adjusted in representative
FRepresent the pressure drop and the R of power transistor
FRepresent the resistance (Europe) of field coil.Therefore, owing to adjust voltage V
SChange and cause field supply I
FVariation smaller.For example: be approximately 10%-10 ℃ to+90 ℃ temperature range internal magnetic field electric currents variations.
Except that above-mentioned, recently see that a tangible trend is exactly that engine (engine) is installed in space very little in the automobile, so the temperature around the generator may rise very high, this just causes a kind of danger, promptly because the heat that voltage adjuster produces makes the temperature of each semiconductor element may surpass the junction temperature that allows.
An object of the present invention is to provide a voltage adjuster that is applicable to the charge in batteries generator wherein, even the voltage adjuster environment temperature rises to undesired height, each semiconductor element that also can avoid forming voltage adjuster suffers thermal breakdown.
Characteristics of the present invention are to control by the temperature at voltage adjuster place the maximum conduction ratio of power transistor in the adjuster; even when the voltage adjuster environment temperature of using at the charge in batteries generator rises to abnormal height, also can protect each semiconductor element to avoid suffering thermal breakdown.
Fig. 1 is the voltage regulator circuit that has generator by embodiment of the present invention;
Fig. 2 is load control or the conduction ratio control circuit detail drawing of Fig. 1;
Fig. 3 illustrates each output voltage waveforms of taking from Fig. 2 circuit;
Fig. 4 illustrates each temperature characterisitic of Fig. 2 control circuit;
Fig. 5 is the relation curve of field supply and ambient temperature in Fig. 1 embodiment;
Fig. 6 illustrates the relation property curve between the adjuster ambient temperature and each junction temperature in Fig. 1 embodiment.
One embodiment of the invention are shown in Fig. 1.Among the figure, the generator pivot coil 3 of Y-connection is connected to storage battery 7 by a three-phase full wave rectifier circuit 5.(+) utmost point of storage battery 7 is connected to an end of charging indicator light 9 by key switch 8.The other end of charging indicator light 9 is connected on the L terminal.Be connected to the end that also has field coil 4 on the L terminal, the negative electrode of fly-wheel diode 11, an end of first rheostat 16, an end, an end of conduction ratio control circuit 19 and an end of rheostat 20 of part-Di three rheostats 18 of voltage divider.The other end ground connection of field coil 4.The anode of fly-wheel diode 11 is connected to the collector electrode of power transistor 10, the latter's emitter grounding, and its base stage then is connected to the emitter-base bandgap grading of the first transistor 13.The emitter-base bandgap grading of power transistor 10 also is connected to storage battery 7 () utmost point.
The other end of first resistor 16 is connected to the collector electrode of transistor seconds 12, and the latter's emitter-base bandgap grading is connected to the base stage of the first transistor 13.The base stage of transistor seconds 12 is connected to conduction ratio control circuit 19.The collector electrode of the other end of second resistor 20 and the 3rd transistor 14 is connected with the collector electrode of the first transistor 13, the emitter grounding of the 3rd transistor 14, and its base stage is connected on the anode of voltage stabilizing didoe 15.The negative electrode of voltage stabilizing didoe 15 is connected to the other end of part-Di three resistors 18 of voltage divider and an end of the 4th resistor 17.And the latter's other end ground connection.
By the above-mentioned circuit of forming, when connecting key switch 8, initially go through magnetoelectricity and flow through by charging indicator light 9 by field coil 4.When key switch 8 was connected, first and second transistors 13 and 12 were switched on, and the 14 not conductings of the 3rd transistor.Make the rotor starting of going through magnetic coil 4 when engine (engine) begins to rotate later on, produce electric energy.Generator voltage rises and charging indicator light extinguishes as a result, causes electric current to pass through booster diode 6 feeds and gives field coil 4.
When the rotating speed liter of generator causes the voltage of end points L to reach predetermined value, voltage stabilizing didoe conducting, the 3rd also conducting of transistor 14.Because 14 conductings of the 3rd transistor, the collector electrode of the first transistor 13 becomes low level, therefore makes power transistor 10 judge that the field supply in this moment by field coil 4 returns via fly-wheel diode 11, with the dissipation electric energy.When field supply reduces and the L terminal voltage is lower than predetermined value and no longer includes electric current when following and flow through voltage stabilizing didoe 15, therefore make 14 shutoffs of the 3rd transistor.Because transistor 14 is judged to the first transistor 13 is turn-offed and power transistor 10 conductings.And because power transistor 10 conductings, the electric current by field coil 4 will increase once more.As mentioned above, for the voltage of controlling the L end has predetermined value, the actual control that power transistor 10 is carried out turn-on and turn-off makes it act as switching device.Conduction ratio control circuit 19 works in this control procedure, with keep second and the first transistor 12 and 13 be in conducting state.
, to Fig. 4 voltage or conduction ratio control circuit 19 are described in detail below with reference to Fig. 2.
Constant voltage circuit is made up of a voltage stabilizing didoe 50, diode 51 and resistor 52 in Fig. 2.Voltage constant on voltage stabilizing didoe 50 negative electrodes is made as cathode potential (V
0).The temperature characterisitic of voltage stabilizing didoe 50 and diode 51 has the character that the temperature variation effects that makes two diodes is cancelled out each other, no matter so that the temperature of this moment how can both obtain constant voltage (being 7 volts in the present embodiment).Number designation 53 is represented a resistor, and 54a, 54b and 54c represent diode.Each diode all has negative temperature coefficient, thus when temperature rises anode potential (V
1) will reduce.
The circuit of being made up of resistor 55 and 56, comparator 57, resistor 58,59 and capacitor 60 is an oscillating circuit.Wherein capacitor charging when the output voltage of comparator 57 obtains high level, the output switching activity of comparator 57 is low level, therefore (V when striding across capacitor 60 arrival predetermined values (2 volts) later on
4) drop to 1 volt.After this capacitor 60 discharges.When the voltage that strides across capacitor 60 reaches predetermined value (1 volt), the output of comparator 57 will be overturn again.Owing to repeat such effect, the voltage that strides across capacitor 60 becomes as (the V described in Fig. 3
2) voltage waveform.Like this, another has the comparator 61 of rheostat 62, because relatively at (V1) and (V2) voltage that obtains of place, its output is a square wave.
Suppose voltage (V
1) be higher than 2 volts, because voltage (V
2) be lower than 2 volts forever, so the output of comparator 61 under 10% duty ratio is in high level forever.On the other hand, suppose voltage (V
1) be lower than 1 volt, because voltage (V
2) be higher than 1 volt forever, so the output of comparator 61 under 0% duty ratio is in low level forever.If voltage (V
1) between 1 volt to 2 volts, so, as the voltage (V described in Fig. 3
3) be output as a square wave like that.
Voltage (V
1) change with temperature, its temperature characterisitic is shown among Fig. 4.Usually, at room temperature, the forward voltage of diode is 0.67 volt, and 1 ℃ of this voltage of the every rising of temperature reduces by 2 millivolts.So, if the temperature of control circuit is not more than T
0, and voltage (V
1) above 2 volts.Then comparator output loading ratio is 100%.On the other hand, if rising, temperature is higher than T
0, and voltage (V
1) drop to and be lower than 2 volts, then comparator output loading ratio will be less than 100%.
Specifically, control loop 19 is as the base current of control transistor seconds 12, like this, gives fixed temperature T when the temperature T of voltage adjuster device 2 surpasses
C=T
0The time, conduction ratio will be diminished.
Particularly the temperature when power transistor 10 surpasses power transistor junction temperature T
JLimiting value T
AShi Keneng produces thermal breakdown.So, as shown in Figure 6, as the environment temperature T of voltage adjuster 2
CReach certain temperature T
OThe time (for example 105 ℃), produce electric energy by the method that adopts 10 conductings of power controlling transistor.
By reducing the electric current I of field coil 4
F(field supply) can accomplish this point, specifically then is shown among Fig. 5.In particular, be that conducting by power controlling transistor 10 recently reduces field supply.At 100% conduction ratio, power transistor junction temperature T
JReach temperature T
OThe time make power transistor 10 become operating state.And from above temperature T
OUp to temperature T
2(for example 130 ℃) conduction ratio will descend, thereby in temperature T
OThe time junction temperature will the value of reaching capacity T
A
As mentioned above, when surpassing, environment temperature gives fixed temperature T
OThe time, by the field supply I of field coil 4
FReduce, simultaneously, surpass TC=T in temperature suddenly
OThe time, the junction temperature rate of climb of power transistor 10 also reduces suddenly.
As can be known above-mentioned, to making the power transistor junction temperature value of reaching capacity T in the prior art shown in Figure 6
J=T
AEnvironment temperature be T
C=T
1But according to the present embodiment, environment temperature can be up to T
C=T
2That is concerning general voltage adjuster, its tolerance limit temperature is by T
1Become T
2This just makes it can satisfy the high temperature requirement in automobile engine (engine) space.In this case, be higher than T in temperature range
C=T
1The time because of the downfield electric current I
F, its output current is littler than previous device.Yet it is very of short duration to notice that device operates in time of this scope, thereby needn't worry that storage battery can be with tele-release light.
As seen by above-mentioned, even environment temperature is elevated to abnormal temperature, the present invention has eliminated the contingent thermal breakdown of each semiconductor element in the charge in batteries voltage regulator for generator and control method thereof.
Claims (4)
1, the control device of the output voltage of the automobile charging generator that uses of a kind of Control of Automobile battery charge comprises:
The magnet exciting coil of charging generator is provided the device of exciting current; Also comprise the semiconductor switching device of connecting, for interrupting above-mentioned exciting current selectively, whereby to control the output voltage of charging generator with above-mentioned magnet exciting coil;
Voltage adjusting device is used to control the conduction ratio of above-mentioned semiconductor switching device, whereby and the exciting current of magnet exciting coil is delivered in control, so that the output voltage of charging generator keeps basically is constant;
React the device of above-mentioned semiconductor switching device temperature on every side, when described environment temperature surpasses a predetermined value, by reducing its conduction ratio puts on described excitation winding with restriction exciting current;
Its characteristics are,
The device that reacts above-mentioned environment temperature comprises the device that produces pulse signal, its pulse frequency according to around temperature surpass described predetermined value what and change; And the device of controlling described semiconductor switching device according to the pulse frequency of described pulse signal.
2, according to the control device of claim 1, its characteristics are, the pulse frequency of described pulse signal is 100% when described environment temperature is lower than described predetermined value, and, when described environment temperature surpasses described predetermined value, by reducing the conduction ratio of described semiconductor switching device, and described pulse frequency is decreased.
3, according to the control device of claim 1, its characteristics are, the predetermined value of described environment temperature is according to preventing that described semiconductor switching device from surpassing the temperature upper limit that it allowed and selecting.
4, according to the control device of claim 1, its characteristics are, produce the device of above-mentioned pulse signal, comprise a temperature-sensitive circuit, in order to produce first signal of the described environment temperature of representative, an oscillating circuit, in order to produce secondary signal, this signal is to vibrate between predetermined high pressure and low voltage level, and a comparator, in order to produce described pulse signal by more described first signal and described secondary signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106149A CN85106149B (en) | 1985-08-15 | 1985-08-15 | Voltage regulator for generator and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106149A CN85106149B (en) | 1985-08-15 | 1985-08-15 | Voltage regulator for generator and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106149A true CN85106149A (en) | 1987-04-22 |
| CN85106149B CN85106149B (en) | 1987-07-29 |
Family
ID=4794913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106149A Expired CN85106149B (en) | 1985-08-15 | 1985-08-15 | Voltage regulator for generator and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85106149B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516275A (en) * | 2012-06-15 | 2014-01-15 | 三菱电机株式会社 | Control device and control method for a vehicle AC generator |
| CN103777142A (en) * | 2012-10-18 | 2014-05-07 | 奕微科半导体科技股份有限公司 | Signal detection circuit for automobile generator |
| CN106803692A (en) * | 2015-11-26 | 2017-06-06 | 广州汽车集团股份有限公司 | Automobile current generator intelligent charge control method and control system |
| CN112514239A (en) * | 2018-06-27 | 2021-03-16 | 法雷奥电机设备公司 | Rotating electrical machine provided with a current sensor and a diagnostic module |
-
1985
- 1985-08-15 CN CN85106149A patent/CN85106149B/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516275A (en) * | 2012-06-15 | 2014-01-15 | 三菱电机株式会社 | Control device and control method for a vehicle AC generator |
| CN103516275B (en) * | 2012-06-15 | 2016-08-03 | 三菱电机株式会社 | The control device of vehicle-mounted dlternator and control method |
| CN103777142A (en) * | 2012-10-18 | 2014-05-07 | 奕微科半导体科技股份有限公司 | Signal detection circuit for automobile generator |
| CN103777142B (en) * | 2012-10-18 | 2016-09-28 | 奕微科半导体科技股份有限公司 | Signal detection circuit for automobile generator |
| CN106803692A (en) * | 2015-11-26 | 2017-06-06 | 广州汽车集团股份有限公司 | Automobile current generator intelligent charge control method and control system |
| CN112514239A (en) * | 2018-06-27 | 2021-03-16 | 法雷奥电机设备公司 | Rotating electrical machine provided with a current sensor and a diagnostic module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85106149B (en) | 1987-07-29 |
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