CN107070190A - A kind of supply unit and its electric capacity method for heating and controlling - Google Patents
A kind of supply unit and its electric capacity method for heating and controlling Download PDFInfo
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- CN107070190A CN107070190A CN201710284565.0A CN201710284565A CN107070190A CN 107070190 A CN107070190 A CN 107070190A CN 201710284565 A CN201710284565 A CN 201710284565A CN 107070190 A CN107070190 A CN 107070190A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
Abstract
The embodiment of the present invention provides a kind of supply unit and its electric capacity method for heating and controlling, and the supply unit includes voltage conversion circuit and heating control circuit；The voltage conversion circuit includes switching power circuit, the first electric capacity and the second electric capacity, the first end of first electric capacity is electrically connected with the voltage input end of the switching power circuit, and the first end of second electric capacity is connected with the voltage output end of the switching power circuit；The heating control circuit includes the gate-controlled switch being electrically connected between the voltage input end and the voltage output end, for being turned under the driving of preset switches control signal, and forms charging and discharging circuit between first electric capacity and the second electric capacity；The charging and discharging circuit is used to conduct charging and discharging currents, and is heated by the charging and discharging currents for second electric capacity.The embodiment of the present invention can effectively prevent from influenceing the normal of supply unit to use because capacitance under cryogenic declines.
Description
Technical field
The present invention relates to power technique fields, more particularly to a kind of supply unit and its electric capacity method for heating and controlling.
Background technology
In all kinds of Switching Power Supplies, occur that obvious capacity subtracts at low temperature as the electrochemical capacitor of output filter capacitor
Small, the capacity fall of the electrochemical capacitor of part model at low temperature is more than 50%.Output filter capacitor capacity significantly subtracts
It is small that Switching Power Supply can be caused all kinds of failures occur, for example, may result in the electricity of output filter capacitor with heavy load startup power supply
Pressure is unstable, so that the voltage specification of the switching tube more than Switching Power Supply.At present, in the application of Switching Power Supply, to prevent Yin Wen
Spend low and produce above mentioned problem, it is common practice to the warm-up times certain to Switching Power Supply, generally require a few minutes to half
Hour or so.When the capacity of wait electrochemical capacitor reaches the value of needs, then access load.In addition, also having at the bottom of electrochemical capacitor
End sets heater, and controls heater to be heated for electrochemical capacitor by heating control circuit first when Switching Power Supply is opened,
To cause the capacity restoration of electrochemical capacitor to normal value.If however, be not provided with heater, Switching Power Supply heat engine usually require compared with
The long time, it is impossible to ensure the operating efficiency of Switching Power Supply under cryogenic；If setting heater, switch electricity can be caused
The production cost increase in source.
The content of the invention
The embodiment of the present invention provides a kind of supply unit and its electric capacity method for heating and controlling, with relatively low cost in low temperature bar
The electric capacity heating of supply unit is realized under part, so that the operating efficiency under ensureing the cryogenic conditions of supply unit.
First aspect of the embodiment of the present invention provides a kind of supply unit, it is characterised in that including：Voltage conversion circuit and add
Thermal control circuit；
The voltage conversion circuit includes switching power circuit, the first electric capacity and the second electric capacity, the switching power circuit
Including voltage input end and voltage output end, the first end of first electric capacity is electrically connected with the voltage input end, and described
The first end of two electric capacity is connected with the voltage output end, the second end of first electric capacity and the second end of second electric capacity
Electrical connection；
The heating control circuit include gate-controlled switch, the gate-controlled switch be electrically connected to the voltage input end with it is described
Between voltage output end, the gate-controlled switch is used to turn under the driving of preset switches control signal, and in the described first electricity
Hold and form charging and discharging circuit between second electric capacity；
The charging and discharging circuit is used to conduct charging and discharging currents between first electric capacity and second electric capacity, and leads to
The charging and discharging currents are crossed to heat for second electric capacity.
Wherein, the gate-controlled switch in the heating control circuit is controlled to turn on by the preset switches control signal, from
And charging and discharging circuit is formed between first electric capacity and second electric capacity, because charging and discharging circuit is in the presence of electric current
Heat can be produced, and then can be by the charging and discharging currents between first electric capacity and second electric capacity come to described second
Electric capacity is heated, and can effectively be prevented because the capacity of second electric capacity occurs influenceing the electricity declining to a great extent under cryogenic
The normal of source device is used, so as to ensure the operating efficiency of supply unit under cryogenic.
In one embodiment, the heating control circuit also include current-limiting resistance, the current-limiting resistance with it is described can
Control switch series connection, the size for limiting the charging and discharging currents in the charging and discharging circuit.
Wherein, the current-limiting resistance charging and discharging currents in the charging and discharging circuit can be prevented excessive and damage it is described can
Control switch.
In one embodiment, the supply unit also includes switch driving circuit, the switch driving circuit and institute
The control end electrical connection of gate-controlled switch is stated, is controlled for exporting the preset switches control signal, and according to the preset switches
Signal drives the gate-controlled switch on or off.
In one embodiment, the switch driving circuit is isolated drive circuit.
In one embodiment, the switch driving circuit includes photo-coupler and driver, the photo-coupler one
End is electrically connected with the signal output part of the driver, and the other end is electrically connected with the control end of the gate-controlled switch, for by institute
The preset switches control signal for stating the signal output part output of driver is coupled to the control end of the gate-controlled switch.
Wherein, the switch driving circuit is set to by isolated drive circuit by the photo-coupler, so as to
Effectively prevent the switch driving circuit from producing interference to the switching power circuit of the supply unit, so as to ensure the switch
The stability of power circuit.
In one embodiment, the switching power circuit includes energy storage inductor, first switch pipe and second switch pipe,
The first end of the energy storage inductor is electrically connected with the voltage input end, the second end and the first switch of the energy storage inductor
The first end of pipe and the electrical connection of the first end of the second switch pipe, the second end of the first switch pipe and first electric capacity
The second end and second electric capacity the electrical connection of the second end, the second end of the second switch pipe and voltage output end electricity
Connection.
In one embodiment, the preset switches control signal is identical with the drive signal of the first switch pipe.
It is wherein, identical with the drive signal of the first switch pipe by the way that the preset switches control signal is set to,
The first switch pipe can be caused while turning on and for energy storage inductor charging, to control the gate-controlled switch conducting
The charging and discharging circuit is formed, and then second electric capacity is heated, drive circuit is set without being individually for the gate-controlled switch,
So as to prevent from being separately provided interference of the drive circuit to the switching power circuit, and reduce the production of the supply unit
Cost.
In one embodiment, the supply unit also includes the capacitance electrically connected with the switch driving circuit
Circuit is detected, the capacitance detection circuit is also electrically connected with first electric capacity and second electric capacity, for detecting
The capacity of the second electric capacity is stated, and when the capacity of second electric capacity exceedes predetermined threshold value, triggers the switch driving circuit and stops
Only work, the supply unit enters normal operating conditions.
In one embodiment, the capacitance detection circuit includes voltage detecting circuit and calculation of capacity circuit,
The voltage detecting circuit is electrically connected with first electric capacity and second electric capacity, for during the gate-controlled switch is turned on
The voltage of first electric capacity is detected, and detects the voltage of second electric capacity at least twice, wherein, it is adjacent to detect described twice
The time interval of the voltage of second electric capacity is prefixed time interval, and respectively obtains the first voltage of second electric capacity and described
The second voltage of second electric capacity, the calculation of capacity circuit is used for according to the voltage of first electric capacity, second electric capacity
First voltage and second voltage and the prefixed time interval, calculate the capacity of second electric capacity.
Wherein, during being heated to second electric capacity, by detecting the capacity of second electric capacity, so that
The gate-controlled switch cut-off can be triggered, i.e., when second electric capacity when the capacity of second electric capacity exceedes predetermined threshold value
Capacity can meet the supply unit load driving demand when, stop to second electric capacity heat, so as to
While so that the capacity restoration of second electric capacity is to required capacity, the power consumption of the supply unit is effectively controlled.
Second aspect of the embodiment of the present invention provides a kind of electric capacity method for heating and controlling, including：
Heating control circuit, the heating control are set between the voltage input end and voltage output end of voltage conversion circuit
Circuit processed includes gate-controlled switch；
The gate-controlled switch conducting is driven according to preset switches control signal, and in the first electricity of the voltage conversion circuit
Hold and form charging and discharging circuit between the second electric capacity；
Charging and discharging currents are conducted between first electric capacity and second electric capacity by the charging and discharging circuit, and led to
The charging and discharging currents are crossed to heat for second electric capacity.
Wherein, the gate-controlled switch in the heating control circuit is controlled to turn on by the preset switches control signal, from
And charging and discharging circuit is formed between first electric capacity and second electric capacity, because charging and discharging circuit is in the presence of electric current
Heat can be produced, and then can be by the charging and discharging currents between first electric capacity and second electric capacity come to described second
Electric capacity is heated, and can effectively be prevented because the capacity of second electric capacity occurs influenceing the electricity declining to a great extent under cryogenic
The normal of source device is used, so as to ensure the operating efficiency of supply unit under cryogenic.
In one embodiment, methods described also includes：The capacity of second electric capacity is detected, and in the described second electricity
When the capacity of appearance exceedes predetermined threshold value, trigger the switch driving circuit and be stopped, the supply unit enters normal work
State.
In one embodiment, the capacity of detection second electric capacity, including：
The voltage of first electric capacity is detected during the gate-controlled switch is turned on；
Detect the voltage of second electric capacity at least twice during the gate-controlled switch is turned on, respectively obtain described second
The second voltage of the first voltage of electric capacity and second electric capacity, wherein, the adjacent voltage for detecting second electric capacity twice
Time interval is prefixed time interval；
According to the voltage of first electric capacity, the first voltage of second electric capacity and second voltage and the preset time
Interval, calculates the capacity of second electric capacity.
Wherein, during being heated to second electric capacity, by detecting the capacity of second electric capacity, so that
The gate-controlled switch cut-off can be triggered, i.e., when second electric capacity when the capacity of second electric capacity exceedes predetermined threshold value
Capacity can meet the supply unit load driving demand when, stop to second electric capacity heat, so as to
While so that the capacity restoration of second electric capacity is to required capacity, the power consumption of the supply unit is effectively controlled.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be in the prior art and of the invention
The accompanying drawing used required in embodiment description is briefly described.
Fig. 1 is the first structure schematic diagram of supply unit provided in an embodiment of the present invention；
Fig. 2 is the second structural representation of supply unit provided in an embodiment of the present invention；
Fig. 3 is the 3rd structural representation of supply unit provided in an embodiment of the present invention；
Fig. 4 is the first pass schematic diagram of electric capacity method for heating and controlling provided in an embodiment of the present invention；
Fig. 5 is the second procedure schematic diagram of electric capacity method for heating and controlling provided in an embodiment of the present invention；
Fig. 6 is the 3rd schematic flow sheet of electric capacity method for heating and controlling provided in an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described.
Referring to Fig. 1, in an embodiment of the invention there is provided a kind of supply unit 100, including：Voltage conversion circuit
110th, heating control circuit 130 and switch driving circuit 150.
The voltage conversion circuit 110 includes switching power circuit 111, the first electric capacity C1 and the second electric capacity C2, described to open
Powered-down source circuit 111 includes voltage input end In and voltage output end Out, the first electric capacity C1 first end and the voltage
Input In is electrically connected, and the first end of the second electric capacity C2 is connected with the voltage output end Out, the first electric capacity C1's
Second end is electrically connected with the second end of the second electric capacity C2.
The heating control circuit 130 is electrically connected to the voltage input end including gate-controlled switch K, the gate-controlled switch K
Between In and the voltage output end Out, the switch driving circuit 150 is electrically connected with the control end of the gate-controlled switch k, is used
In output preset switches control signal, the gate-controlled switch K is used to turn under the driving of the preset switches control signal, and
Charging and discharging circuit is formed between the first electric capacity C1 and the second electric capacity C2.
The charging and discharging circuit is used to conduct charging and discharging currents between the first electric capacity C1 and the second electric capacity C2,
And heated by the charging and discharging currents for the second electric capacity C2.
In the present embodiment, the voltage conversion circuit 110 is Boost circuit, and the first electric capacity C1 is the Boost
The input filter capacitor of circuit, the second electric capacity C2 is the output filter capacitor of the Boost circuit.The second electric capacity C2
For electrochemical capacitor.The switching power circuit 111 includes energy storage inductor L1, first switch pipe Q1 and second switch pipe Q2, described
Energy storage inductor L1 first end is electrically connected with the voltage input end In, and the second end of the energy storage inductor L1 is opened with described first
Close pipe Q1 first end and the first end electrical connection of the second switch pipe Q2, the second end of the first switch pipe Q1 with it is described
First electric capacity C1 the second end and the electrical connection of the second end of the second electric capacity C2, the second end of the second switch pipe Q2 and institute
State voltage output end Out electrical connections.Wherein, the first switch pipe Q1 can be Metal-Oxide Semiconductor field effect transistor
Manage (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), the second switch pipe Q2
Can be diode or MOSFET, if the second switch pipe Q2 is diode, the positive pole of the diode and energy storage electricity
Feel L1 the second end electrical connection, negative pole is electrically connected with the voltage output end Out.
It is appreciated that because under cryogenic, the capacity of electrochemical capacitor can be greatly lowered, it is described so as to influence
The stability of supply unit 100.Therefore, the voltage input end In and voltage output end in the switching power circuit 111 are passed through
Being set between Out includes the heating control circuit 130 of the gate-controlled switch K, and is controlled by the preset switches control signal
The gate-controlled switch K conductings, so that charging and discharging circuit is formed between the first electric capacity C1 and the second electric capacity C2, due to
The impedance loop that charging and discharging circuit is present can produce heat in the presence of electric current, so can by the charging and discharging currents come
The second electric capacity C2 is heated, prevented because the capacity of the second electric capacity C2 occurs influenceing declining to a great extent under cryogenic
The normal of the supply unit 100 is used, so as to ensure the operating efficiency of supply unit 100 under cryogenic.
It is appreciated that with the increase of the gate-controlled switch K ON times, the temperature of the second electric capacity C2 gradually rises
Height, correspondingly, the capacity of the second electric capacity C2 also gradually rise, when the capacity of the second electric capacity C2 reaches predetermined threshold value
When, the switch driving circuit 150 is additionally operable to drive the gate-controlled switch K cut-offs according to the preset switches control signal.Enter
One step, because the capacity of the second electric capacity C2 has been able to meet demand, so as to control the switching power circuit
111 enter normal mode of operation.Wherein, the gate-controlled switch K can be MOSFET or bipolar junction transistor
(BipolarJunction Transistor, BJT).
Referring to Fig. 2, in one embodiment, the heating control circuit 130 also includes current-limiting resistance R1, the limit
Leakage resistance R1 connects with the gate-controlled switch K, the size for limiting the charging and discharging currents in the charging and discharging circuit.It can manage
Solution, the size of the current-limiting resistance R1 can be selected according to the current specification of the gate-controlled switch K.
, can be with it is appreciated that to prevent 150 pairs of the switch driving circuit switching power circuit 111 from producing interference
The switch driving circuit 150 is set to isolated drive circuit.
As shown in Fig. 2 in one embodiment, the switch driving circuit 150 can include photo-coupler 151 and drive
Dynamic device 153, described one end of photo-coupler 151 is electrically connected with the signal output part of the driver 153, the other end with it is described controllable
K control end electrical connection is switched, for the preset switches control signal of the signal output part output of the driver 153 to be coupled
To the control end of the gate-controlled switch K.It is appreciated that the switch driving circuit 150 is set by the photo-coupler 151
For isolated drive circuit, so as to effectively prevent the switch electricity of 150 pairs of the switch driving circuit supply unit 100
Source circuit 111 produces interference, so as to ensure the stability of the switching power circuit 111.
In one embodiment, the preset switches control signal can also be set to and the first switch pipe Q1
Drive signal it is identical, so as to the energy storage inductor L1 store electric energy while turn on the charging and discharging circuit, that is, exist
The heating to the second electric capacity C2 is completed during the energy storage inductor L1 storages electric energy.It is appreciated that by being multiplexed
State first switch pipe Q1 drive signal to be controlled the gate-controlled switch K, set without being individually for the gate-controlled switch K
Drive circuit, so as to prevent from being separately provided interference of the drive circuit to the switching power circuit 111, and reduces the electricity
The production cost of source device 100.
Referring to Fig. 3, in one embodiment, the supply unit 100 also includes and the switch driving circuit 150
The capacitance detection circuit 170 of electrical connection, capacitance detection circuit 170 also with the first electric capacity C1 and described the
Two electric capacity C2 are electrically connected, the capacity for detecting the second electric capacity C2, and the second electric capacity C2 capacity exceed it is default
During threshold value, trigger the switch driving circuit 150 and drive the gate-controlled switch K to end.
In one embodiment, the capacitance detection circuit 170 includes voltage detecting circuit 171 and calculation of capacity
Circuit 173, the voltage detecting circuit 171 is electrically connected with the first electric capacity C1 and the second electric capacity C2, for described
Gate-controlled switch K detects the voltage Vc1 of the first electric capacity C1 during turning on, and detects the electricity of the second electric capacity C2 at least twice
Pressure, wherein, the time interval of the adjacent voltage for detecting the second electric capacity C2 twice is prefixed time interval tx, and is respectively obtained
The first voltage Vbus1 of the second electric capacity C2 and the second electric capacity C2 second voltage Vbus2, the calculation of capacity circuit
173 are used for voltage Vc1, the first voltage Vbus1 of the second electric capacity C2 and second voltage according to the first electric capacity C1
The Vbus2 and prefixed time interval tx, calculates the capacity of the second electric capacity C2.
It is appreciated that in one embodiment, the calculation of capacity circuit 173 can include processor (not shown),
The processor triggers the voltage detecting circuit 171 and detects the first electric capacity C1 and the second electric capacity C2 voltage, and records
Detect the prefixed time interval tx between the first voltage Vbus1 and second voltage Vbus2 of the second electric capacity C1, and then according to
The voltage Vc1 of the first electric capacity C1, the first voltage Vbus1 and second voltage Vbus2 of the second electric capacity C2 and described pre-
If time interval tx, the capacity of the second electric capacity C2 is calculated, and the capacity of the second electric capacity C2 and predetermined threshold value are carried out
Compare, when the capacity of the second electric capacity C2 is more than or equal to the predetermined threshold value, trigger the switch driving circuit 150 defeated
Go out the control signal for turning off the gate-controlled switch K.It is appreciated that the processor can also be with the first switch pipe Q1 and institute
Second switch pipe Q2 drive circuit (not shown) electrical connection is stated, so as to be exported in the triggering switch driving circuit 150
After the control signal for turning off the gate-controlled switch K, the switching power circuit 111 is controlled to enter normal mode of operation.
Specifically, when the heating control circuit 130 includes the current-limiting resistance R1, in the prefixed time interval tx
It is interior, by electric current I1=(VBUS-Vc1)/R1 of the current-limiting resistance R1, wherein, VBUS is the first voltage Vbus1 and institute
Second voltage Vbus2 average is stated, or, VBUS can also be approximately equal to the first voltage Vbus1 or described second voltages
Vbus2.Correspondingly, in the prefixed time interval tx, the discharge charge amount of the second electric capacity C2 is Q=I1*tx=
(VBUS-Vc1) * tx/R1, the voltage variety U=Vbus1-Vbus2 of the second electric capacity C2.According to above-mentioned condition, Ke Yiji
Calculate capacitance present capacity C=(VBUS-Vc1) the * tx/ [R1* (Vbus1-Vbus2)] for obtaining the second electric capacity C2.It can manage
Solution, can be with the heating control circuit 130 if the heating control circuit 130 does not include the current-limiting resistance R1
Equiva lent impedance is replaced.
It is appreciated that due to can exist in electric capacity equivalent series resistance (Equivalent Series Resistance,
ESR), it should try one's best and avoid the first voltage Vbus1 that the second electric capacity C2 is detected when the gate-controlled switch K is just turned on.To
The first voltage Vbus1 of the second electric capacity C2 is detected when the gate-controlled switch K is just turned on, then is needed the first voltage
Vbus1 subtracts ESR* (VBUS-Vc1)/R1.If avoiding the random time detection described second when the gate-controlled switch K is just turned on
Electric capacity C2 voltage, then need not consider ESR influence.
It is appreciated that in one embodiment, because the second electric capacity C2 passes through 130 pairs of the heating control circuit
The first electric capacity C1 electric discharges, therefore second electric capacity can also be judged by the capacity check to the first electric capacity C1
C1 capacitance change.It is appreciated that for the first electric capacity C1 capacity check, can be using the capacity with the second electric capacity C2
Identical method is detected, the associated description in embodiment illustrated in fig. 3 is specifically referred to, here is omitted.
Referring to Fig. 4, in an embodiment of the invention there is provided a kind of electric capacity method for heating and controlling, it can apply to
In the supply unit 100 provided as shown in Figure 1 to Figure 3 in embodiment, for the electric capacity progress to the supply unit 100
Computer heating control, the electric capacity method for heating and controlling at least comprises the following steps：
Step 401：Heating control circuit is set between the voltage input end and voltage output end of voltage conversion circuit, institute
Stating heating control circuit includes gate-controlled switch；
Step 402：The gate-controlled switch conducting is driven according to preset switches control signal, and in the voltage conversion circuit
The first electric capacity and the second electric capacity between form charging and discharging circuit；
Step 403：Discharge and recharge is conducted between first electric capacity and second electric capacity by the charging and discharging circuit
Electric current, and heated by the charging and discharging currents for second electric capacity.
Referring to Fig. 5, in one embodiment, methods described also includes：
Step 404：The capacity of second electric capacity is detected, and when the capacity of second electric capacity exceedes predetermined threshold value,
Trigger the switch driving circuit to be stopped, the supply unit enters normal operating conditions.
Referring to Fig. 6, in one embodiment, the capacity of detection second electric capacity, including：
Step 601：The voltage of first electric capacity is detected during the gate-controlled switch is turned on；
Step 602：Detect the voltage of second electric capacity at least twice during the gate-controlled switch is turned on, respectively obtain
The second voltage of the first voltage of second electric capacity and second electric capacity, wherein, it is adjacent to detect second electric capacity twice
Voltage time interval be prefixed time interval；
Step 603：According to the voltage of first electric capacity, the first voltage of second electric capacity and second voltage and described
Prefixed time interval, calculates the capacity of second electric capacity.
It is appreciated that implementing for each step can also be referring to figs. 1 to shown in Fig. 3 in the electric capacity method for heating and controlling
Associated description in embodiment, here is omitted.
In embodiments of the present invention, supply unit and its electric capacity method for heating and controlling is controlled by the preset switches
Signal controls the gate-controlled switch conducting in the heating control circuit, so that between first electric capacity and second electric capacity
Charging and discharging circuit is formed, because charging and discharging circuit can produce heat in the presence of electric current, and then the described first electricity can be passed through
Hold the charging and discharging currents between second electric capacity to heat second electric capacity, can effectively prevent because of the described second electricity
The capacity of appearance occurs declining to a great extent under cryogenic and influences the normal of the supply unit to use, so as to ensure supply unit
Operating efficiency under cryogenic.
Claims (12)
1. a kind of supply unit, it is characterised in that including：Voltage conversion circuit and heating control circuit；
The voltage conversion circuit includes switching power circuit, the first electric capacity and the second electric capacity, and the switching power circuit includes
Voltage input end and voltage output end, the first end of first electric capacity are electrically connected with the voltage input end, second electricity
The first end of appearance is connected with the voltage output end, and the second end of first electric capacity and the second end of second electric capacity are electrically connected
Connect；
The heating control circuit includes gate-controlled switch, and the gate-controlled switch is electrically connected to the voltage input end and the voltage
Between output end, the gate-controlled switch be used under the driving of preset switches control signal turn on, and first electric capacity with
Charging and discharging circuit is formed between second electric capacity；
The charging and discharging circuit is used to conduct charging and discharging currents between first electric capacity and second electric capacity, and passes through institute
Charging and discharging currents are stated to heat for second electric capacity.
2. supply unit as claimed in claim 1, it is characterised in that the heating control circuit also includes current-limiting resistance, institute
State current-limiting resistance to connect with the gate-controlled switch, the size for limiting the charging and discharging currents in the charging and discharging circuit.
3. supply unit as claimed in claim 1 or 2, it is characterised in that the supply unit also includes switch driving circuit,
The switch driving circuit is electrically connected with the control end of the gate-controlled switch, for exporting the preset switches control signal, and
The gate-controlled switch on or off is driven according to the preset switches control signal.
4. supply unit as claimed in claim 3, it is characterised in that the switch driving circuit is isolated drive circuit.
5. supply unit as claimed in claim 3, it is characterised in that the switch driving circuit includes photo-coupler and driving
Device, described photo-coupler one end is electrically connected with the signal output part of the driver, the control of the other end and the gate-controlled switch
End electrical connection, for the preset switches control signal of the signal output part output of the driver to be coupled into the gate-controlled switch
Control end.
6. the supply unit as described in any one of claim 1,2,4,5, it is characterised in that the switching power circuit includes storage
Energy inductance, first switch pipe and second switch pipe, the first end of the energy storage inductor is electrically connected with the voltage input end, described
Second end of energy storage inductor is electrically connected with the first end of the first switch pipe and the first end of the second switch pipe, and described
Second end of one switching tube is electrically connected with the second end of first electric capacity and the second end of second electric capacity, and described second opens
The second end for closing pipe is electrically connected with the voltage output end.
7. supply unit as claimed in claim 6, it is characterised in that the preset switches control signal and the first switch
The drive signal of pipe is identical.
8. supply unit as claimed in claim 3, it is characterised in that the supply unit also includes and switch drive electricity
The capacitance detection circuit of road electrical connection, capacitance detection circuit also with first electric capacity and second electric capacity
Electrical connection, the capacity for detecting second electric capacity, and when the capacity of second electric capacity exceedes predetermined threshold value, trigger institute
State switch driving circuit to be stopped, the supply unit enters normal operating conditions.
9. supply unit as claimed in claim 8, it is characterised in that the capacitance detection circuit includes voltage detecting electricity
Road and calculation of capacity circuit, the voltage detecting circuit are electrically connected with first electric capacity and second electric capacity, in institute
The voltage of first electric capacity is detected during stating gate-controlled switch conducting, and detects the voltage of second electric capacity at least twice, its
In, the time interval of the adjacent voltage for detecting second electric capacity twice is prefixed time interval, and respectively obtains described second
The second voltage of the first voltage of electric capacity and second electric capacity, the calculation of capacity circuit is used for according to first electric capacity
Voltage, the first voltage of second electric capacity and second voltage and the prefixed time interval, calculate the appearance of second electric capacity
Amount.
10. a kind of electric capacity method for heating and controlling of supply unit as described in any one of claim 1 to 9, it is characterised in that bag
Include：
Heating control circuit, the computer heating control electricity are set between the voltage input end and voltage output end of voltage conversion circuit
Road includes gate-controlled switch；
Gate-controlled switch conducting is driven according to preset switches control signal, and the voltage conversion circuit the first electric capacity with
Charging and discharging circuit is formed between second electric capacity；
Charging and discharging currents are conducted between first electric capacity and second electric capacity by the charging and discharging circuit, and pass through institute
Charging and discharging currents are stated to heat for second electric capacity.
11. method as claimed in claim 10, it is characterised in that methods described also includes：Detect the appearance of second electric capacity
Amount, and when the capacity of second electric capacity exceedes predetermined threshold value, trigger the switch driving circuit and be stopped, the power supply
Device enters normal operating conditions.
12. method as claimed in claim 11, it is characterised in that the capacity of detection second electric capacity, including：
The voltage of first electric capacity is detected during the gate-controlled switch is turned on；
Detect the voltage of second electric capacity at least twice during the gate-controlled switch is turned on, respectively obtain second electric capacity
First voltage and second electric capacity second voltage, wherein, the time of the adjacent voltage for detecting second electric capacity twice
At intervals of prefixed time interval；
According between the voltage of first electric capacity, the first voltage of second electric capacity and second voltage and the preset time
Every the capacity of calculating second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710284565.0A CN107070190B (en) | 2017-04-26 | 2017-04-26 | Power supply device and capacitance heating control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710284565.0A CN107070190B (en) | 2017-04-26 | 2017-04-26 | Power supply device and capacitance heating control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107070190A true CN107070190A (en) | 2017-08-18 |
| CN107070190B CN107070190B (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710284565.0A Active CN107070190B (en) | 2017-04-26 | 2017-04-26 | Power supply device and capacitance heating control method thereof |
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| CN (1) | CN107070190B (en) |
Cited By (3)
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| WO2021136085A1 (en) * | 2020-01-02 | 2021-07-08 | 合肥阳光新能源科技有限公司 | Control signal modulation circuit, inverter, and control system |
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| CN107070190B (en) | 2020-06-09 |
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