CN206595888U - The overvoltage crowbar of compressor control system and Switching Power Supply - Google Patents
The overvoltage crowbar of compressor control system and Switching Power Supply Download PDFInfo
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- CN206595888U CN206595888U CN201720306347.8U CN201720306347U CN206595888U CN 206595888 U CN206595888 U CN 206595888U CN 201720306347 U CN201720306347 U CN 201720306347U CN 206595888 U CN206595888 U CN 206595888U
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Abstract
The utility model discloses the overvoltage crowbar of a kind of compressor control system and Switching Power Supply, the circuit includes：Voltage sampling unit, voltage sampling unit is connected with the output end of Switching Power Supply, the output voltage to sampling switch power supply；Gate-controlled switch, the first end of gate-controlled switch is connected with the input of Switching Power Supply；Energy storage absorptive unit, energy storage absorptive unit is connected with the second end of gate-controlled switch；Control unit, control end of the control unit respectively with power switch pipe in the control end and Switching Power Supply of gate-controlled switch is connected, control unit is judged the output voltage of Switching Power Supply, and when the output voltage of Switching Power Supply is more than predeterminated voltage export the first control signal to power switch pipe to reduce the output voltage and the second control signal of output of Switching Power Supply to gate-controlled switch to control energy storage absorptive unit to absorb the input overvoltage of Switching Power Supply, so as to effectively prevent Switching Power Supply excessive pressure damages, it is ensured that the reliability of Switching Power Supply.
Description
Technical field
The utility model is related to power technique fields, more particularly to a kind of overvoltage crowbar of Switching Power Supply and a kind of pressure
Contracting machine control system.
Background technology
Switching Power Supply is widely used in motor and compressor etc. the characteristics of its efficiency high, small volume, high reliability
In field.Switching Power Supply is as SPU, and the reliability and stability of its service behaviour are most important.Work as Switching Power Supply
Input voltage it is too high when, Switching Power Supply can be caused to damage, have a strong impact on the reliability of power supply.
Utility model content
The utility model is intended at least solve one of technical problem in correlation technique to a certain extent.
Therefore, a purpose of the present utility model is to propose a kind of overvoltage crowbar of Switching Power Supply, by split
The output voltage in powered-down source is judged, and when the output voltage of Switching Power Supply is more than predeterminated voltage, exports different controls
Signal is to power switch pipe and gate-controlled switch, to reduce input or the output voltage of Switching Power Supply, so as to effectively prevent switch electricity
Source excessive pressure damages, it is ensured that the reliability of Switching Power Supply.
Another purpose of the present utility model is to propose a kind of compressor control system.
To reach above-mentioned purpose, a kind of overvoltage crowbar for Switching Power Supply that on the one hand the utility model proposes, including：
Voltage sampling unit, the voltage sampling unit is connected with the output end of the Switching Power Supply, and the voltage sampling unit is used to
The output voltage for the Switching Power Supply of sampling；Gate-controlled switch, the input of the first end of the gate-controlled switch and the Switching Power Supply
End is connected；Energy storage absorptive unit, the energy storage absorptive unit is connected with the second end of the gate-controlled switch；Control unit, it is described
Control end of the control unit respectively with power switch pipe in the control end and the Switching Power Supply of the gate-controlled switch is connected, described
Control unit is judged the output voltage of the Switching Power Supply, and is more than default electricity in the output voltage of the Switching Power Supply
The output voltage and output second that the first control signal is exported during pressure to the power switch pipe to reduce the Switching Power Supply are controlled
Signal processed is to the gate-controlled switch to control the energy storage absorptive unit to absorb the input overvoltage of the Switching Power Supply.
According to the overvoltage crowbar of Switching Power Supply of the present utility model, electricity is switched by voltage sampling unit real-time sampling
The output voltage in source, control unit is judged the output voltage of Switching Power Supply, and is more than in the output voltage of Switching Power Supply
During predeterminated voltage, the first control signal of output is to power switch pipe, to reduce the output voltage of Switching Power Supply, meanwhile, control is single
Member the second control signal of output is to gate-controlled switch, to control energy storage absorptive unit to inhale the input overvoltage of Switching Power Supply
Receive, so as to effectively prevent Switching Power Supply excessive pressure damages, it is ensured that the reliability of Switching Power Supply.
Further, the overvoltage crowbar of above-mentioned Switching Power Supply also includes：Clamper protection location, the clamper protection
Unit is connected between the second end of the gate-controlled switch and the energy storage absorptive unit, and the clamper protection location is to the storage
Can absorptive unit progress clamper protection.
Specifically, the gate-controlled switch is triode, MOS (Metal Oxide Semiconductor, metal oxide
Semiconductor) manage or IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).
Further, the clamper protection location includes first resistor and clamp diode, one end of the first resistor
It is connected with the anode of the clamp diode and with first node, the other end of the first resistor and the clamp diode
Negative electrode be connected and with Section Point, the first node is connected with the second end of the gate-controlled switch, the Section Point
It is connected with the energy storage absorptive unit.
Further, the energy storage absorptive unit includes storage capacitor and second resistance, the positive terminal of the storage capacitor
It is connected with the Section Point, the negative pole end ground connection of the storage capacitor, the second resistance is in parallel with the storage capacitor even
Connect.
Further, the voltage sampling unit includes 3rd resistor and the 4th resistance being connected in series, and the series connection connects
There is the 3rd node, the 3rd node is connected with described control unit between the 3rd resistor connect and the 4th resistance.
Further, the power switch pipe is the first metal-oxide-semiconductor, and the Switching Power Supply also includes the first inductance and the one or two
Pole pipe, one end of first inductance is used as the input of the Switching Power Supply, the other end of first inductance and described the
The anode of one diode is connected and with fourth node, the negative electrode of first diode as the Switching Power Supply output
End, the fourth node is connected with the drain electrode of first metal-oxide-semiconductor, grid and the described control unit phase of first metal-oxide-semiconductor
Even, the source ground of first metal-oxide-semiconductor.
Specifically, first control signal is different and separate from second control signal.
Specifically, first control signal is high-frequency PWM (Pulse Width Modulation, pulse width modulation)
Signal, second control signal is low frequency switch signal.
Specifically, described control unit is according to the high-frequency PWM signal is to the switch time of the power switch pipe or accounts for
Sky is than being adjusted to reduce the output voltage of the Switching Power Supply.
To reach above-mentioned purpose, on the other hand the utility model proposes a kind of compressor control system, and it includes above-mentioned
Switching Power Supply overvoltage crowbar.
, can by the overvoltage crowbar of above-mentioned Switching Power Supply according to compressor control system of the present utility model
Effectively prevent Switching Power Supply excessive pressure damages, it is ensured that the reliability of Switching Power Supply, and then ensure that the work of compressor control system can
By property.
Brief description of the drawings
Fig. 1 is the block diagram of the overvoltage crowbar of the Switching Power Supply according to the utility model embodiment；
Fig. 2 is the overvoltage crowbar figure according to the Switching Power Supply of the utility model one embodiment；And
Fig. 3 is the block diagram of the compressor control system according to the utility model embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Below with reference to the accompanying drawings come describe the utility model embodiment proposition Switching Power Supply overvoltage crowbar and compression
Machine control system.
Fig. 1 is the block diagram of the overvoltage crowbar of the Switching Power Supply according to the utility model embodiment.Fig. 2 is root
According to the overvoltage crowbar figure of the Switching Power Supply of the utility model one embodiment.As depicted in figs. 1 and 2, the Switching Power Supply
Overvoltage crowbar may include：Voltage sampling unit 10, gate-controlled switch 20, energy storage absorptive unit 30 and control unit 40.
Wherein, voltage sampling unit 10 is connected with the output end of Switching Power Supply 50, and voltage sampling unit 10 is to sample out
The output voltage in powered-down source 50.The first end of gate-controlled switch 20 is connected with the input of Switching Power Supply 50.Energy storage absorptive unit 30
It is connected with the second end of gate-controlled switch 20.Control unit 40 respectively with power in the control end and Switching Power Supply 50 of gate-controlled switch 20
Switching tube Q1 control end is connected, and control unit 40 is judged the output voltage of Switching Power Supply 50, and in Switching Power Supply 50
Output voltage be more than predeterminated voltage when the first control signal is exported to power switch pipe Q1 to reduce the output of Switching Power Supply 50
Voltage and the second control signal of output are to gate-controlled switch 20 to control input of the energy storage absorptive unit 30 to Switching Power Supply 50 excessively electric
Pressure is absorbed.Wherein, gate-controlled switch 20 can be triode, metal-oxide-semiconductor or IGBT, and predeterminated voltage can be carried out according to actual conditions
Demarcation.
According to one embodiment of the present utility model, power switch pipe Q1 can be the first metal-oxide-semiconductor, and Switching Power Supply 50 may be used also
One end including the first inductance L1 and the first diode D1, the first inductance L1 is used as the input of Switching Power Supply 50, the first inductance
The L1 other end is connected with the first diode D1 anode and with fourth node J4, and the first diode D1 negative electrode is used as switch
The output end of power supply 50, fourth node J4 is connected with the drain electrode of the first metal-oxide-semiconductor, grid and the phase of control unit 40 of the first metal-oxide-semiconductor
Even, the source ground GND of the first metal-oxide-semiconductor.
According to one embodiment of the present utility model, the first control signal is different and separate from the second control signal,
First control signal can be high-frequency PWM signal, and the second control signal can be low frequency switch signal, and the low frequency switch signal can
To be high level signal or low level signal.
Further, according to one embodiment of the present utility model, control unit 40 is opened power according to high-frequency PWM signal
The switch time or dutycycle for closing pipe Q1 are adjusted to reduce the output voltage of Switching Power Supply 50.
Specifically, in the case where input voltage is unstable, power-supply fluctuation (such as solar energy and wind energy hair of power network are included
The external conditions such as electricity change and it is uncontrollable) and application scenario load change, it is likely that cause the output voltage of Switching Power Supply 50
More than normal output voltage scope, therefore, in embodiment of the present utility model, using the output voltage of Switching Power Supply 50 as anti-
Feedback signal, carries out real-time sampling by the output voltage to Switching Power Supply 50, different controls is then exported according to output voltage
Signal, to reduce the output voltage and input overvoltage of Switching Power Supply 50, prevents switch to Switching Power Supply 50 and gate-controlled switch 20
Power supply excessive pressure damages.
Specifically, as shown in Fig. 2 the alternating voltage of AC power V1 outputs becomes after the rectification of full bridge rectifier 70
DC voltage, then the Boost type topological structure by being made up of the first inductance L1, the first diode D1 and power switch pipe Q1
Afterwards, higher DC voltage is exported.Output voltage after the collection boosting of voltage sampling unit 10, and fed back to control unit
40,40 pairs of output voltages of control unit are handled and (such as amplify, filter), and export the different and separate control of two-way
Signal processed, difference controlling switch power supply 50 and gate-controlled switch 20.
For example, when alternating voltage is raised, the DC voltage that corresponding full bridge rectifier 70 is exported can be raised, by opening
The output voltage that powered-down source 50 is produced can also be raised.When the output voltage of Switching Power Supply 50 is more than predeterminated voltage, control unit
Power switch pipe Q1 of 40 the first control signals of output (such as high-frequency PWM signal) into Switching Power Supply 50, is opened by adjusting power
The switch time or dutycycle for closing pipe Q1 reduce the output voltage of Switching Power Supply 50.Meanwhile, the output of control unit 40 second is controlled
Signal (such as low frequency switch signal) processed is to gate-controlled switch 20 (such as triode, metal-oxide-semiconductor or IGBT), by controlling gate-controlled switch 20 to lead
It is logical, energy storage absorptive unit 30 is started working, to absorb the input overvoltage of Switching Power Supply 50 (the too high DC voltage of input),
So that the input overvoltage reduction of Switching Power Supply 50, prevents Switching Power Supply excessive pressure damages.
In embodiment of the present utility model, the built-in voltage comparing unit of control unit 40, discharge circuit, schmidt trigger
Device, delay circuit etc., to handle the output voltage that voltage sampling unit 10 is gathered, and export different control letters
Number, to be controlled to the power switch pipe Q1 in gate-controlled switch 20 and Switching Power Supply 50, reduce Switching Power Supply 50 output and
Overvoltage is inputted, Switching Power Supply excessive pressure damages are prevented.
Therefore, according to the overvoltage crowbar of the Switching Power Supply of the utility model embodiment, control unit is judging voltage
When the output voltage of sampling unit collection exceedes predeterminated voltage, two different control signals are exported according to output voltage, passed through
First control signal adjusts pulse frequency or adjusting pulsewidth, to reduce the output voltage of Switching Power Supply, passes through the second control signal
The break-make of energy storage absorptive unit is controlled, to reduce the input overvoltage of Switching Power Supply, to reach the purpose of protection switch power supply.And
And the circuit is applied to the situation of wide input power application, particularly input voltage is unstable, and output voltage requires very high
Situation.
According to one embodiment of the present utility model, as shown in Fig. 2 the overvoltage crowbar of above-mentioned Switching Power Supply is also wrapped
Include：Clamper protection location 60.Wherein, clamper protection location 60 is connected to the second end and the energy storage absorptive unit 30 of gate-controlled switch 20
Between, clamper protection location 60 carries out clamper protection to energy storage absorptive unit 30.
Further, according to one embodiment of the present utility model, as shown in Fig. 2 clamper protection location 60 may include
One resistance R1 and clamp diode D2, first resistor R1 one end are connected with clamp diode D2 anode and with first node
J1, first resistor the R1 other end are connected with clamp diode D2 negative electrode and with Section Point J2, first node J1 with can
Second end of control switch 20 is connected, and Section Point J2 is connected with energy storage absorptive unit 30.
According to one embodiment of the present utility model, as shown in Fig. 2 energy storage absorptive unit 30 may include storage capacitor C1 and
Second resistance R2, storage capacitor C1 positive terminal are connected with Section Point J2, and storage capacitor C1 negative pole end is grounded GND, second
Resistance R2 is connected in parallel with storage capacitor C1.
Specifically, when control unit 40 judges that the output voltage of Switching Power Supply 50 is more than predeterminated voltage, control unit
40 the second control signals of output (such as low frequency switch signal) are to gate-controlled switch 20, so that gate-controlled switch 20 is turned on, energy storage absorbs single
Member 30 absorbs the input overvoltage of Switching Power Supply 50, and is absorbed or attrition voltage by the first resistor R1 in clamper protection location 60
The instantaneous large-current produced is mutated, to reduce the impact to energy storage absorptive unit 30, while clamp diode D2 can clamp voltage
Direction, prevents the excessive pressure damages of gate-controlled switch 20.
Storage capacitor C1 in energy storage absorptive unit 30 can be electrochemical capacitor, the input to storage switch power supply 50
Voltage, meanwhile, the second resistance R2 in energy storage absorptive unit 30 can also consume and absorb input overvoltage, to reduce switch electricity
The input overvoltage in source 50, reaches the purpose of protection switch power supply.
According to one embodiment of the present utility model, as shown in Fig. 2 voltage sampling unit 10 may include be connected in series
Three resistance R3 and the 4th resistance R4, have the 3rd node J3, the 3rd between the 3rd resistor R3 and the 4th resistance R4 that are connected in series
Node J3 is connected with control unit 40.
That is, in embodiment of the present utility model, Switching Power Supply directly can be gathered using electric resistance partial pressure method
50 output voltage (i.e. magnitude of voltage at the 3rd node J3), and control unit 40 is fed back to, to pass through control unit 40
Handled, and export different control signals and Switching Power Supply 50 and gate-controlled switch 20 are controlled.
In addition, in embodiment of the present utility model, the overvoltage crowbar of above-mentioned Switching Power Supply may also include voltage
Circuit 80 is filtered, wherein, voltage filtering circuit 80 may include electrochemical capacitor C2, in the DC voltage to reduce pulsation as far as possible
Alternating component, retains its flip-flop, makes the reduction of output voltage ripple coefficient, and waveform becomes smoother.
In summary, according to the overvoltage crowbar of the Switching Power Supply of the utility model embodiment, voltage sample list is passed through
The output voltage of first real-time sampling Switching Power Supply, control unit is judged the output voltage of Switching Power Supply, and is switching electricity
When the output voltage in source is more than predeterminated voltage, the first control signal of output is to power switch pipe, to reduce the output of Switching Power Supply
Voltage, meanwhile, control unit exports the second control signal to gate-controlled switch, to control energy storage absorptive unit to the defeated of Switching Power Supply
Enter overvoltage to be absorbed, so as to effectively prevent Switching Power Supply excessive pressure damages, it is ensured that the reliability of Switching Power Supply.
Fig. 3 is the block diagram of the compressor control system according to the utility model embodiment.As shown in figure 3, the pressure
Contracting machine control system 1000 may include：The overvoltage crowbar 100 of above-mentioned Switching Power Supply.
According to the compressor control system of the utility model embodiment, pass through the overvoltage protection electricity of above-mentioned Switching Power Supply
Road, can effectively prevent Switching Power Supply excessive pressure damages, it is ensured that the reliability of Switching Power Supply, and then ensure compressor control system
Functional reliability.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than indicate or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model
System.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two
It is individual, three etc., unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features are directly contacted, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be entered
Row is combined and combined.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (11)
1. a kind of overvoltage crowbar of Switching Power Supply, it is characterised in that including：
Voltage sampling unit, the voltage sampling unit is connected with the output end of the Switching Power Supply, the voltage sampling unit
Output voltage to the Switching Power Supply of sampling；
Gate-controlled switch, the first end of the gate-controlled switch is connected with the input of the Switching Power Supply；
Energy storage absorptive unit, the energy storage absorptive unit is connected with the second end of the gate-controlled switch；
Control unit, described control unit respectively with power switch pipe in the control end and the Switching Power Supply of the gate-controlled switch
Control end be connected, described control unit is judged the output voltage of the Switching Power Supply, and in the Switching Power Supply
Output voltage exports the first control signal to the power switch pipe to reduce the defeated of the Switching Power Supply when being more than predeterminated voltage
Go out voltage and the second control signal of output to the gate-controlled switch to control the energy storage absorptive unit to the Switching Power Supply
Input overvoltage is absorbed.
2. the overvoltage crowbar of Switching Power Supply as claimed in claim 1, it is characterised in that also include：
Clamper protection location, the clamper protection location is connected to the second end of the gate-controlled switch and the energy storage absorptive unit
Between, the clamper protection location carries out clamper protection to the energy storage absorptive unit.
3. the overvoltage crowbar of Switching Power Supply as claimed in claim 1 or 2, it is characterised in that the gate-controlled switch is three
Pole pipe, metal-oxide-semiconductor or IGBT.
4. the overvoltage crowbar of Switching Power Supply as claimed in claim 2, it is characterised in that the clamper protection location includes
First resistor and clamp diode, one end of the first resistor are connected with the anode of the clamp diode and with first segment
Point, the other end of the first resistor is connected with the negative electrode of the clamp diode and with Section Point, the first node
It is connected with the second end of the gate-controlled switch, the Section Point is connected with the energy storage absorptive unit.
5. the overvoltage crowbar of Switching Power Supply as claimed in claim 4, it is characterised in that the energy storage absorptive unit includes
Storage capacitor and second resistance, the positive terminal of the storage capacitor are connected with the Section Point, the negative pole of the storage capacitor
End ground connection, the second resistance is connected in parallel with the storage capacitor.
6. the overvoltage crowbar of Switching Power Supply as claimed in claim 1, it is characterised in that the voltage sampling unit includes
The 3rd resistor being connected in series and the 4th resistance, have Section three between the 3rd resistor being connected in series and the 4th resistance
Point, the 3rd node is connected with described control unit.
7. the overvoltage crowbar of Switching Power Supply as claimed in claim 1, it is characterised in that the power switch pipe is first
Metal-oxide-semiconductor, the Switching Power Supply also includes the first inductance and the first diode, and one end of first inductance is used as the switch electricity
The input in source, the other end of first inductance is connected with the anode of first diode and with fourth node, described
The negative electrode of first diode is used as the output end of the Switching Power Supply, the fourth node and the drain electrode phase of first metal-oxide-semiconductor
Even, the grid of first metal-oxide-semiconductor is connected with described control unit, the source ground of first metal-oxide-semiconductor.
8. the overvoltage crowbar of Switching Power Supply as claimed in claim 1, it is characterised in that first control signal and institute
State the second control signal different and separate.
9. the overvoltage crowbar of Switching Power Supply as claimed in claim 8, it is characterised in that first control signal is height
Frequency pwm signal, second control signal is low frequency switch signal.
10. the overvoltage crowbar of Switching Power Supply as claimed in claim 9, it is characterised in that described control unit is according to institute
High-frequency PWM signal is stated the switch time of the power switch pipe or dutycycle are adjusted to reduce the defeated of the Switching Power Supply
Go out voltage.
11. a kind of compressor control system, it is characterised in that including the Switching Power Supply as any one of claim 1-10
Overvoltage crowbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720306347.8U CN206595888U (en) | 2017-03-27 | 2017-03-27 | The overvoltage crowbar of compressor control system and Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720306347.8U CN206595888U (en) | 2017-03-27 | 2017-03-27 | The overvoltage crowbar of compressor control system and Switching Power Supply |
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| Publication Number | Publication Date |
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| CN206595888U true CN206595888U (en) | 2017-10-27 |
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| CN201720306347.8U Active CN206595888U (en) | 2017-03-27 | 2017-03-27 | The overvoltage crowbar of compressor control system and Switching Power Supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941314A (en) * | 2017-03-27 | 2017-07-11 | 广东美芝精密制造有限公司 | The overvoltage crowbar of compressor control system and Switching Power Supply |
-
2017
- 2017-03-27 CN CN201720306347.8U patent/CN206595888U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941314A (en) * | 2017-03-27 | 2017-07-11 | 广东美芝精密制造有限公司 | The overvoltage crowbar of compressor control system and Switching Power Supply |
| CN106941314B (en) * | 2017-03-27 | 2023-08-25 | 广东美芝精密制造有限公司 | Compressor control system and overvoltage protection circuit of switching power supply |
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