CN204721236U - The power supply circuits of inverter and there are its household electrical appliance - Google Patents
The power supply circuits of inverter and there are its household electrical appliance Download PDFInfo
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- CN204721236U CN204721236U CN201520455777.7U CN201520455777U CN204721236U CN 204721236 U CN204721236 U CN 204721236U CN 201520455777 U CN201520455777 U CN 201520455777U CN 204721236 U CN204721236 U CN 204721236U
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Abstract
The utility model discloses a kind of power supply circuits of inverter and have its household electrical appliance, power supply circuits comprise: Power Entry Module; Rectification module; Be connected to the first electric capacity between the first output of rectification module and the second output, wherein, the pulsation maximum of the first electric capacity both end voltage is more than the twice of pulsation minimum value; Inversion module; With the module of releasing of the first Capacitance parallel connection, module of releasing comprises the first diode, the first resistance and second electric capacity of mutually connecting successively, and the anode of the first diode is connected with the first output of rectification module; Second resistance, its one end is connected with the Section Point between the first resistance and the second electric capacity, and the other end is connected with the second output of rectification module; Second diode, its anode is connected with Section Point, thus can absorb surge energy, suppresses the fluctuation of the first capacitance voltage, for inversion module provides stable input voltage, ensures the stability of power supply circuits.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly a kind of power supply circuits of inverter and a kind of household electrical appliance with these power supply circuits.
Background technology
In the related, in inverter, inversion module is used for the DC bus-bar voltage inversion after rectification is that load supplying thought by alternating current, but, in the relevant inverter course of work, when larger change occurs in load also can there is larger fluctuation in DC bus-bar voltage, inverter is easily caused to damage, inverter less stable.
Further, the DC/DC circuit carrying out low-voltage power supply in inverter can be control section provides power supply.In the related, the input of DC/DC circuit is usually direct to be connected with DC bus, the DC bus-bar voltage after rectification is shared with inversion module, like this, when DC bus-bar voltage fluctuation is larger, the input voltage of DC/DC circuit will directly fluctuate, the low pressure exported also follows fluctuation, thus causes controlling confusion.
Therefore, there are the needs improved in correlation technique.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model is the power supply circuits proposing a kind of inverter, and these power supply circuits can suppress the fluctuation of DC bus-bar voltage, is the input voltage of DC/DC circuit with stable.
Another object of the present utility model is to propose a kind of household electrical appliance with these power supply circuits.
To achieve the above object, the power supply circuits of a kind of inverter that the utility model proposes on the one hand, comprising: Power Entry Module, described Power Entry Module is connected with power supply; Rectification module, described rectification module is connected with described Power Entry Module, and described rectification module has the first output and the second output; First electric capacity, described first electric capacity is connected between the first output of described rectification module and the second output; Inversion module, described inversion module is connected with the second output with the first output of described rectification module respectively; With the module of releasing of described first Capacitance parallel connection, described module of releasing comprises the first diode, the first resistance and second electric capacity of mutually connecting successively, the anode of described first diode is connected with the first output of described rectification module, wherein, between described first diode and described first resistance, there is first node, between described first resistance and described second electric capacity, there is Section Point; Second resistance, one end of described second resistance is connected with described Section Point, and the other end of described second resistance is connected with the second output of described rectification module; Second diode, the anode of described second diode is connected with described Section Point.
According to the power supply circuits of the inverter that the utility model proposes, first electric capacity is connected between the first output of rectification module and the second output, and to release module in the first electric capacity two ends parallel connection, module of releasing comprises the first diode of series connection mutually successively, first resistance and the second electric capacity, and, one end of second resistance is connected with the Section Point between the first resistance and the second electric capacity, the other end of the second resistance is connected with the second output of rectification module, the anode of the second diode is connected with Section Point, thus can surge energy be absorbed, the fluctuation of the first capacitance voltage (i.e. DC bus-bar voltage) that effective suppression causes because of surge, ensure the stability of the first capacitance voltage, for inversion module provides stable input voltage, inversion module is avoided to control confusion or damage because of voltage fluctuation, ensure the stability of power supply circuits.
Further; described Power Entry Module has the first output and the second output; described rectification module has first input end and the second input, and described power supply circuits also comprise: be connected to the PTC protection module between the second output of described Power Entry Module and the second input of described rectification module.
Further, the power supply circuits of described inverter also comprise: the inductance of connecting with described PTC protection module, for adjusting the power factor of described power supply circuits.
Further, the negative electrode of described second diode is also connected with described first node.
Further, the power supply circuits of described inverter also comprise: brake module, described brake module and described first Capacitance parallel connection, and described brake module is used for after stopping power supply to motor, absorbs the electric current because described motor inertial rotation produces.
Particularly, described brake module comprises the 3rd resistance and first switch of series connection mutually.
Further, the power supply circuits of described inverter also comprise: control module, and described control module, after stopping power supply to described motor, controls described first switch and closes.
To achieve the above object, a kind of household electrical appliance that the utility model proposes on the other hand, comprising: the power supply circuits of described inverter.
According to the household electrical appliance that the utility model proposes, by the power supply circuits of above-mentioned inverter, surge energy can be absorbed, the fluctuation of the DC bus-bar voltage that effective suppression causes because of surge, ensure the stability of DC bus-bar voltage, for inversion module in power supply circuits provides stable input voltage, avoid inversion module to control confusion or damage because of voltage fluctuation, ensure the stability of power supply circuits.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the power supply circuits of inverter according to the utility model embodiment;
Fig. 2 is the circuit theory diagrams of the power supply circuits of inverter according to the utility model embodiment; And
Fig. 3 is the circuit theory diagrams of the power supply circuits of inverter according to another embodiment of the utility model.
Reference numeral:
Motor 10, Power Entry Module 20, rectification module 30, first electric capacity C1, inversion module 40, electricity-fetching module 50, power supply 100, module of releasing 60, first resistance R1, the second electric capacity C2, the first diode D1, the second resistance R2, second diode D2, DC/DC module 501, PTC protection module 70, relay K M1, inductance L 1, brake module 80, the 3rd resistance R3, the first K switch 1 and control module 90.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Below with reference to the accompanying drawings describe the power supply circuits of the inverter that the utility model embodiment proposes and there are the household electrical appliance of these power supply circuits.
Fig. 1 is the schematic diagram of the power supply circuits of inverter according to the utility model embodiment.As shown in Figure 1, the power supply circuits of this inverter comprise: Power Entry Module 20, rectification module 30, first electric capacity C1, inversion module 40, module of releasing 60, second resistance R2 and the second diode D2.
Wherein, Power Entry Module 20 is connected with power supply 100.Wherein, alternating current is inputed to Power Entry Module 20 by power supply 100, and Power Entry Module 20 is for carrying out filtering and alternating current after output processing to the alternating current of input.Particularly, Power Entry Module 20 has the input of first input end and second, and the first input end of Power Entry Module 20 is connected with the live wire of power supply 100, and the second input of Power Entry Module 20 is connected with the zero line of power supply 100.
Rectification module 30 is connected with Power Entry Module 20, and rectification module 30 has the first output and the second output.Wherein, rectification module 30 carries out rectification for the alternating current exported Power Entry Module 20 and exports high voltage direct current.Particularly, rectification module 30 also has first input end and the second input, and the first input end of rectification module 30 is connected with the first output of Power Entry Module 20, and the second input of rectification module 30 is connected with the second output of Power Entry Module 20.According to an example of the present utility model, rectification module 30 can comprise the rectifier bridge that four diodes are formed.
First electric capacity C1 is connected between the first output of rectification module 30 and the second output, namely say, one end of first electric capacity C1 is connected with the first output of rectification module 30, between the other end of the first electric capacity C1 and the second output of rectification module 30, and one end of the first electric capacity C1 can be used as the positive terminal of DC bus, the other end of the first electric capacity C1 can be used as the negative pole end of DC bus.
Inversion module 40 is connected with the second output with the first output of rectification module 30 respectively.Particularly, inversion module 40 also has first input end and the second input, the first input end of inversion module 40 is connected with the first output of rectification module 30, second input of inversion module 40 is connected with the second output of rectification module 30, and between the first electric capacity C1 rectification module 30 in parallel and inversion module 40, namely say that the first electric capacity C1 is connected in parallel between the first output of rectification module 30 and the second output, and be also connected in parallel between the first input end of inversion module 40 and the second input.Wherein, it is alternating current that inversion module 40 will be used for high voltage direct current inversion, and is supplied to motor 10 and runs to control motor 10.
Module of releasing 60 is in parallel with the first electric capacity C1, and module of releasing 60 can be connected in parallel between rectification module 30 and the first electric capacity C1.Module of releasing 60 comprises the first diode D1, the first resistance R1 and the second electric capacity C2 of series connection mutually successively, the anode of the first diode D1 is connected with the first output of rectification module 30, wherein, between first diode D1 and the first resistance R1, there is first node, between the first resistance R1 and the second electric capacity C2, there is Section Point.
Particularly, in the example of Fig. 1-Fig. 3, the anode of the first diode D1 is connected with the first output of rectification module 30, the negative electrode of the first diode D1 is connected with one end of the first resistance R1, the other end of the first resistance R1 is connected with one end of the second electric capacity C2, and the other end of the second electric capacity C2 is connected with the second output of rectification module 30.Should be understood that, the order of connection of the first diode D1, the first resistance R1 and the second electric capacity C2 can be changed.
It should be noted that, the current potential of the first output of rectification module 30 is higher than the current potential of the second output of rectification module 30, namely say, consistent to the direction of electronegative potential with the high potential of the output from rectification module 30 from the cathodic direction of anode of the first diode D1.
Specifically, in the utility model embodiment, the first resistance R1 is used for current limliting, by increasing by the first resistance R1, can reduce the rush of current to the second electric capacity when powering on or have a surge impact.First diode D1 is used for high-pressure section and low-pressure section to isolate, thus reduces influencing each other between high-low pressure.
One end of second resistance R2 is connected with Section Point, the other end of the second resistance R2 is connected with the second output of rectification module 30, namely say, second resistance R2 is in parallel with the second electric capacity C2, more specifically, when the second electric capacity C2 is electrochemical capacitor, the positive pole of the second electric capacity C2 is connected with Section Point, and the negative pole of the second electric capacity C2 is connected with the second output of rectification module 30; The anode of the second diode D2 is connected with Section Point.
It should be noted that, the second resistance R2 be used for electric discharge, cut off the electricity supply 100 time, the second electric capacity C2 carries out repid discharge by the second resistance R2, thus prevents residual voltage to the injury of human body, for maintenance, maintenance safety guarantee is provided.Further, the second diode D2 is used for preventing back discharge.
As mentioned above, after power supply circuits access power supply 100, alternating current is converted to high voltage direct current (i.e. DC bus-bar voltage) after flowing through Power Entry Module 20 and rectification module 30, this high voltage direct current is supplied to motor 10 after being alternating current by inversion module 40 inversion again, runs to control motor 10.And, the the first electric capacity C1 be connected between rectification module 30 and inversion module 40 can stablize to keep DC bus-bar voltage the smoothing filtering of high voltage direct current, simultaneously, the module 60 of releasing be connected between rectification module 30 and inversion module 40 can absorb surge energy, the fluctuation of the first capacitance voltage (i.e. DC bus-bar voltage) that effective suppression causes because of surge, ensure the stability of the first capacitance voltage, for inversion module provides stable input voltage, avoid inversion module to control confusion or damage because of voltage fluctuation, ensure the stability of power supply circuits.
Further, as the example of Fig. 2-3, the power supply circuits of inverter also comprise: DC/DC module 501, DC/DC module 501 is powered for inversion module 40, the first input end of DC/DC module 501 is connected with the negative electrode of the second diode D2, and the second input of DC/DC module 501 is connected with the second output of rectification module 30.
Wherein, as shown in Figure 3, the negative electrode of the second diode D2 also can be connected with first node.That is, the first input end of DC/DC module 501 directly can be connected with the negative electrode of the first diode D1.In other words, the negative electrode of the first diode D1 can be connected with the first input end of DC/DC module 501, thus reduce the loss of the first resistance when DC/DC module normally works.
It should be noted that, DC/DC module 501 is for carrying out DC decompression.DC/DC module 501, second resistance R2 and the second diode D2 can form electricity-fetching module 50.Wherein, electricity-fetching module 50 can get the voltage of galvanic current as V2 point Fig. 2-Fig. 3 from power supply circuits, and is that low-voltage DC thinks that the control section of inversion module 40 is powered by DC/DC module 501 by the voltage transitions of V2 point.Particularly, inversion module 40 can comprise inverter bridge and the control circuit for controlling inverter bridge, stable low-voltage DC is supplied to the control section of inversion module 40 by electricity-fetching module 50, thus meets the work requirements of control section, and avoids controlling confusion.
Specifically, the second resistance R2 be used for electric discharge, cut off the electricity supply 100 time, the second electric capacity C2 carries out repid discharge by the second resistance R2, thus prevents residual voltage to the injury of human body, for maintenance, maintenance safety guarantee is provided.Second diode D2 is used for preventing back discharge, one end of second electric capacity C2 is connected with the first input end of DC/DC module 501 by the second diode D2, like this by increase by second diode D2, the stability of the input voltage of DC/DC module 501 can be ensured, and then provide stable supply power voltage for inversion module 40, and the flyback voltage produced in DC/DC module 501 course of work can be isolated, avoid DC/DC module 501 to the reverse impact of the second electric capacity C2, reduce power supply to the impact of the input voltage (voltage as the V2 point in Fig. 2-Fig. 3) of DC/DC module 501 simultaneously.In addition, the voltage (voltage as the V_P point in Fig. 2-Fig. 3) being supplied to inversion module 40 also can be isolated with the voltage (voltage as the V1 point in Fig. 2-Fig. 3) being supplied to electricity-fetching module 50 by the first diode D1, thus reduces impact each other.
Thus, these power supply circuits can ensure the stability of the input voltage of electricity-fetching module 50, and then provide stable low pressure input voltage for inversion module, and effectively improve the power factor of power supply.
Further; as shown in Fig. 2-Fig. 3; Power Entry Module 20 has the first output and the second output; rectification module 30 has first input end and the second input; power supply circuits also comprise: PTC (Positive TemperatureCoefficient; semistor) protection module 70, PTC protection module 70 is connected between the second output of Power Entry Module 20 and the second input of rectification module 30.
It should be noted that, PTC protection module is used for preventing surge when switching on power.
Particularly, as shown in Fig. 2-Fig. 3, power supply circuits also comprise relay K M1, and the switch of relay K M1 is in parallel with PTC protection module 70.
Further, according to the embodiment of Fig. 2-Fig. 3, the power supply circuits of inverter also comprise: inductance L 1, and inductance L 1 is connected with PTC protection module 70, for adjusting the power factor of power supply circuits.
In addition, according to the embodiment of Fig. 2-Fig. 3, the power supply circuits of inverter also comprise: brake module 80.Brake module 80 is in parallel with the first electric capacity C1, and brake module 80, for after stopping power supply to motor 10, absorbs the electric current because motor inertial rotation produces.
Particularly, brake module 80 comprises the 3rd resistance R3 and first K switch 1 of series connection mutually.More specifically, the first K switch 1 can be triode, and one end of the 3rd resistance R3 is connected with one end of the first electric capacity C1, and the other end of the 3rd resistance R3 is connected with the collector electrode of triode, the grounded emitter of triode.
Further, the power supply circuits of inverter also comprise: control module 90, and control module 90, after stopping power supply to motor 10, controls the first K switch 1 and closes.More specifically, control module 90 is connected with the base stage of triode, after stopping power supply to motor 10, the exportable high level signal of control module 90 to the base stage of triode to make triode ON, after triode ON, brake module 80 carries out the electric energy that work produces because of inertial rotation to absorb motor.
It should be noted that, after shutting down as the motor 10 of load, continuation rotates due to the effect of inertia by motor 10, now motor 10 will be in generating state, the peak voltage of motor 10 electricity energy, generation is consumed by brake module 80, thus realizes the quick stopping of motor by dynamic braking.Certainly, motor 10 electricity can also can charge to the power supply circuits of the utility model embodiment, and is converted into the power supply in loop.
In sum, according to the power supply circuits of the inverter that the utility model embodiment proposes, first electric capacity is connected between the first output of rectification module and the second output, and to release module in the first electric capacity two ends parallel connection, module of releasing comprises the first diode of series connection mutually successively, first resistance and the second electric capacity, and, one end of second resistance is connected with the Section Point between the first resistance and the second electric capacity, the other end of the second resistance is connected with the second output of rectification module, the anode of the second diode is connected with Section Point, thus can surge energy be absorbed, the fluctuation of the first capacitance voltage (i.e. DC bus-bar voltage) that effective suppression causes because of surge, ensure the stability of the first capacitance voltage, for inversion module provides stable input voltage, inversion module is avoided to control confusion or damage because of voltage fluctuation, ensure the stability of power supply circuits.And the power supply circuits of the utility model embodiment can also ensure the stability of the input voltage of electricity-fetching module, and then provide stable supply power voltage for inversion module, and reverse the produced electric energy of motor can be absorbed after motor stopping.
Finally, the utility model embodiment also proposed a kind of household electrical appliance, comprises the power supply circuits of the inverter of above-described embodiment.
According to the household electrical appliance that the utility model embodiment proposes, by the power supply circuits of the inverter of above-described embodiment, surge energy can be absorbed, the fluctuation of the DC bus-bar voltage that effective suppression causes because of surge, ensure the stability of DC bus-bar voltage, for inversion module in power supply circuits provides stable input voltage, avoid inversion module to control confusion or damage because of voltage fluctuation, ensure the stability of power supply circuits.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of 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 second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature 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 ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (8)
1. power supply circuits for inverter, is characterized in that, comprising:
Power Entry Module, described Power Entry Module is connected with power supply;
Rectification module, described rectification module is connected with described Power Entry Module, and described rectification module has the first output and the second output;
First electric capacity, described first electric capacity is connected between the first output of described rectification module and the second output;
Inversion module, described inversion module is connected with the second output with the first output of described rectification module respectively;
With the module of releasing of described first Capacitance parallel connection, described module of releasing comprises the first diode, the first resistance and second electric capacity of mutually connecting successively, the anode of described first diode is connected with the first output of described rectification module, wherein, between described first diode and described first resistance, there is first node, between described first resistance and described second electric capacity, there is Section Point;
Second resistance, one end of described second resistance is connected with described Section Point, and the other end of described second resistance is connected with the second output of described rectification module; And
Second diode, the anode of described second diode is connected with described Section Point.
2. the power supply circuits of inverter as claimed in claim 1, it is characterized in that, described Power Entry Module has the first output and the second output, and described rectification module has first input end and the second input, and described power supply circuits also comprise:
Be connected to the PTC protection module between the second output of described Power Entry Module and the second input of described rectification module.
3. the power supply circuits of inverter as claimed in claim 2, is characterized in that, also comprise:
The inductance of connecting with described PTC protection module, for adjusting the power factor of described power supply circuits.
4. the power supply circuits of inverter as claimed in claim 1, it is characterized in that, the negative electrode of described second diode is also connected with described first node.
5. the power supply circuits of inverter as claimed in claim 1, is characterized in that, also comprise:
Brake module, described brake module and described first Capacitance parallel connection, described brake module is used for after stopping power supply to motor, absorbs the electric current because described motor inertial rotation produces.
6. the power supply circuits of inverter as claimed in claim 5, is characterized in that, described brake module comprises the 3rd resistance and first switch of series connection mutually.
7. the power supply circuits of inverter as claimed in claim 6, is characterized in that, also comprise:
Control module, described control module, after stopping power supply to described motor, controls described first switch and closes.
8. household electrical appliance, is characterized in that, comprise the power supply circuits of the inverter as described in any one of claim 1-7.
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| CN201520455777.7U CN204721236U (en) | 2015-06-26 | 2015-06-26 | The power supply circuits of inverter and there are its household electrical appliance |
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| CN201520455777.7U CN204721236U (en) | 2015-06-26 | 2015-06-26 | The power supply circuits of inverter and there are its household electrical appliance |
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| CN204721236U true CN204721236U (en) | 2015-10-21 |
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