CN107579654A - Motor power circuit and washing machine - Google Patents
Motor power circuit and washing machine Download PDFInfo
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- CN107579654A CN107579654A CN201710927330.9A CN201710927330A CN107579654A CN 107579654 A CN107579654 A CN 107579654A CN 201710927330 A CN201710927330 A CN 201710927330A CN 107579654 A CN107579654 A CN 107579654A
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Abstract
The present invention discloses a kind of motor power circuit and washing machine, wherein, motor power circuit includes current limiting unit, rectification filtering unit, control unit and switch element；The input of current limiting unit and the input of switch element connect, and its connecting node is used to input high-voltage ac power, the input interconnection of the output end of current limiting unit, the output end of switch element and rectification filtering unit；The output end of rectification filtering unit and the voltage acquisition end of control unit connect, and the control terminal of control unit and the controlled end of switch element connect；Here, current limiting unit is used for when the dc source of rectification filtering unit output is not up to the first predeterminated voltage, limitation flows through the electric current of rectification filtering unit；Control unit is used for when the dc source of rectification filtering unit output reaches the first predeterminated voltage, the conducting of controlling switch unit, so that the dc source rapid pressure of rectification filtering unit output.Technical solution of the present invention reliability is high.
Description
Technical field
The present invention relates to washing machine technology field, more particularly to a kind of motor power circuit and washing machine.
Background technology
Motor power circuit includes rectification unit and filter unit, wherein, rectification unit and filter unit are respectively used to pair
The high-voltage ac power of input carries out rectification processing and filtering process, is powered using exporting dc source as motor.
Powered although the motor power circuit can be motor, start moment, the friendship of input in motor power circuit
Stream supply voltage is very high, and the impedance very little of rectification unit and filter unit, flows through rectification unit and filter unit electric current is very big.This
Sample, rectification unit and filter unit are easy for because of heavy current impact and moment heats up and burns out, poor reliability.
The content of the invention
The main object of the present invention is to provide a kind of motor power circuit, it is intended to improves the reliable of the motor power circuit
Property.
To achieve the above object, motor power circuit proposed by the present invention includes current limiting unit, rectification filtering unit, control
Unit and switch element；The input of the current limiting unit is connected with the input of the switch element, and its connecting node is used for
Input high-voltage ac power, the output end of the current limiting unit, the output end of the switch element and the rectification filtering unit
Input interconnection；The output end of the rectification filtering unit and the voltage acquisition end of described control unit connect, the control
The control terminal of unit is connected with the controlled end of the switch element；Wherein, the rectification filtering unit, for the high pressure to input
AC power is filtered processing, is powered using exporting dc source as motor；The current limiting unit, in the rectifying and wave-filtering
When the dc source of unit output is not up to the first predeterminated voltage, limitation flows through the electric current of the rectification filtering unit；The control
Unit processed, when the dc source for being exported in the rectification filtering unit reaches first predeterminated voltage, opened described in control
The conducting of unit is closed, so that the dc source rapid pressure of rectification filtering unit output.
Preferably, the current limiting unit includes power resistor, and the first end of the power resistor is the current limiting unit
Input, the second end of the power resistor are the output end of the current limiting unit.
Preferably, described control unit includes first resistor, second resistance, 3rd resistor, the first electric capacity and control chip,
The first end of the first resistor be described control unit voltage acquisition end, the second end of the first resistor and described second
The first end connection of resistance, the second end of the second resistance, the first end of the 3rd resistor, the first of first electric capacity
End and the control chip supply pin interconnection, the control chip control pin for described control unit control terminal, it is described
Second end of 3rd resistor and the second end of first electric capacity are grounded.
Preferably, the switch element includes the 4th resistance, the 5th resistance, the first diode, the second diode, the first crystalline substance
The anode of body pipe, the second electric capacity, relay and the first power supply, the first end of second electric capacity and first diode with
The first power supply connection, the coil of the negative electrode of first diode, the anode of second diode and the relay
Positive pole interconnects, and the common port of the relay is the input of the switch element, and the opened point of the relay is opened to be described
Close the output end of unit, the coil negative pole of the relay, the negative electrode of second diode and the first transistor it is defeated
Enter end interconnection；The first end of the controlled end of the first transistor, the first end of the 4th resistance and the 5th resistance is mutual
Even, the second end of the 4th resistance is the controlled end of the switch element, the second end of second electric capacity, described first brilliant
Second end of the output end of body pipe and the 5th resistance is grounded.
Preferably, the rectification filtering unit includes rectifier bridge and the 3rd electric capacity, and the input of the rectifier bridge is described
The input of rectification filtering unit, the output end of the rectifier bridge are connected with the positive pole of the 3rd electric capacity, and its connecting node is
The output end of the rectification filtering unit, the negative pole ground connection of the 3rd electric capacity.
Preferably, the rectification filtering unit includes the 3rd diode, the 4th diode, the 4th electric capacity and the 5th electric capacity,
The anode of 3rd diode is connected with the negative electrode of the 4th diode, the negative pole of the 4th electric capacity and the described 5th electricity
The positive pole connection of appearance, the connecting node and the 4th electric capacity and the described 5th of the 3rd diode and the 4th diode
The connecting node of electric capacity is the input of the rectification filtering unit, the negative electrode of the 3rd diode and the 4th electric capacity
Positive pole connect, its connecting node be the rectification filtering unit output end, the anode and the described 5th of the 4th diode
The negative pole of electric capacity is grounded.
Preferably, the motor power circuit also includes switching power supply, the input of the switching power supply, institute
State the voltage acquisition end interconnection of the output end and described control unit of rectification filtering unit, the output end of the switching power supply
For exporting power supply to motor.
Preferably, the motor power circuit also includes fuse, and the fuse is used in the high-voltage ac power
Electric current when being more than predetermined current, cut off the current path of the high-voltage ac power and rectification filtering unit.
Corresponding, the present invention also proposes a kind of washing machine, including motor and power supply as described above electricity；Wherein, the electricity
Electromechanical source circuit includes current limiting unit, rectification filtering unit, control unit and switch element；The input of the current limiting unit with
The input connection of the switch element, its connecting node are used to input high-voltage ac power, the output end of the current limiting unit,
The input of the output end of the switch element and the rectification filtering unit interconnects；The output end of the rectification filtering unit with
The voltage acquisition end connection of described control unit, the control terminal of described control unit are connected with the controlled end of the switch element；
Wherein, the rectification filtering unit, for being filtered processing to the high-voltage ac power of input, to export dc source as electricity
Machine is powered；The current limiting unit, when the dc source for being exported in the rectification filtering unit is not up to the first predeterminated voltage,
Limitation flows through the electric current of the rectification filtering unit；Described control unit, for the direct current exported in the rectification filtering unit
When power supply reaches first predeterminated voltage, the conducting of the switch element is controlled, so that rectification filtering unit output
Dc source rapid pressure.
Technical solution of the present invention is not up to first in the dc source that rectification filtering unit exports by current limiting unit and preset
During voltage, limitation flows through the electric current of rectification filtering unit, so as to avoid rectification unit and filter unit because of heavy current impact
And moment heats up and burns out, reliability is high.It is pre- in the dc source that rectification filtering unit exports to reach first by control unit
If during voltage, controlling switch unit conducting so that the dc source rapid pressure of rectification filtering unit output, current limliting can be avoided
Unit consumes excessive electric energy, and, reduce influence of the current limiting unit to the motor power circuit response time, strong adaptability.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the high-level schematic functional block diagram of the embodiment of motor power circuit one of the present invention；
Fig. 2 is the high-level schematic functional block diagram of another embodiment of motor power circuit of the present invention；
Fig. 3 is the electrical block diagram of the another embodiment of motor power circuit of the present invention；
Fig. 4 is the electrical block diagram of the embodiment of rectification filtering unit one of the present invention.
Drawing reference numeral explanation：
| Label | Title | Label | Title | Label | Title |
| 10 | Rectification filtering unit | D1 | First diode | C1 | First electric capacity |
| 20 | Current limiting unit | D2 | Second diode | C2 | Second electric capacity |
| 30 | Switch element | D3 | 3rd diode | C3 | 3rd electric capacity |
| 40 | Control unit | D4 | 4th diode | C4 | 4th electric capacity |
| 50 | Switching power supply | R1 | First resistor | C5 | 5th electric capacity |
| F1 | Fuse | R2 | Second resistance | J1 | Relay |
| RT | Power resistor | R3 | 3rd resistor | U1 | Control chip |
| DB | Rectifier bridge | R4 | 4th resistance | VCC | First power supply |
| Q1 | The first transistor | R5 | 5th resistance |
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It is to be appreciated that the description for being related to " first ", " second " etc. in the present invention is only used for describing purpose, without being understood that
To indicate or implying its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical scheme
Occur conflicting or will be understood that the combination of this technical scheme is not present when can not realize, also not in the guarantor of application claims
Within the scope of shield.
The present invention proposes a kind of motor power circuit.The motor power circuit is used to be the motor power supply in washing machine.
Referring to Fig. 1, in one embodiment, this motor power circuit includes current limiting unit 20, rectification filtering unit 10, control
Unit 40 and switch element 30 processed, the input of current limiting unit 20 are connected with the input of switch element 30, and its connecting node is used
In input high-voltage ac power, the output end of current limiting unit 20, the output end of switch element 30 and rectification filtering unit 10 it is defeated
Enter end interconnection；The output end of rectification filtering unit 10 is connected with the voltage acquisition end of control unit 40, the control of control unit 40
End is connected with the controlled end of switch element 30.
Here, rectification filtering unit 10 is used to be filtered processing to the high-voltage ac power of input, to export direct current
Source powers for motor.Current limiting unit 20 is used to be not up to the first predeterminated voltage in the dc source that rectification filtering unit 10 exports
When, limitation flows through the electric current of rectification filtering unit 10.Control unit 40 is used for the dc source exported in rectification filtering unit 10
When reaching the first predeterminated voltage, the conducting of controlling switch unit 30, so that the dc source that rectification filtering unit 10 exports is quick
Boosting.
In addition, the first predeterminated voltage can be a fixed value or a span.First predeterminated voltage
Value heavy current impact should can be resisted by rectification filtering unit 10 and be defined, the not predeterminated voltage of concrete restriction first herein
Value.
Specifically, in this motor power circuit course of work：
First, when high-voltage ac power starts input to motor power circuit, the direct current of the output of rectification filtering unit 10
Voltage is less than the first predeterminated voltage.Because switch element 30 is for cut-off state, therefore, the high-voltage ac power of input is through current limliting
Unit 20 flows into rectification filtering unit 10.
Then, the voltage for the dc source that rectification filtering unit 10 exports gradually rises, until the direct current power source voltage reaches
During to the first predeterminated voltage, the controlling switch unit 30 of control unit 40 turns on.In whole process, current limiting unit 20 can limit
The electric current of rectification filtering unit 10 is flowed through, so as to avoid rectification unit and filter unit because of heavy current impact and moment heats up and burns
It is bad.
Finally, due to which the impedance of switch element 30 is substantially zeroed, therefore, the high-voltage ac power of input is through switch element 30
Flow into rectification filtering unit 10, the dc source rapid pressure that rectification filtering unit 10 exports.
It is noted that in an embodiment of the present invention, the direct current that control unit 40 exports in rectification filtering unit 10
Power supply starts when reaching the second predeterminated voltage, and monitoring rectification filtering unit 10 exports the voltage of dc source in real time upon actuation
Size, when direct current power source voltage reaches the first predeterminated voltage, ability controlling switch unit 30 starts.Wherein, the second default electricity
Pressure is less than the first predeterminated voltage.
So, control unit 40 can be made first to start, and monitors rectification filtering unit 10 again after stable and export directly
The voltage swing of power supply is flowed, and the working condition of controlling switch unit 30 is corresponded to according to the voltage swing of the dc source.So as to
Avoid control unit 40 itself from being turned on when being also not up to stable state with regard to controlling switch unit 30, cause malfunction.
Referring to Fig. 3, in one embodiment, above-mentioned current limiting unit 20 includes power resistor RT, the first of power resistor RT
It is the second end of current limiting unit 20 to hold as the input of current limiting unit 20, power resistor RT the second end.It is readily appreciated that, works as high pressure
When AC power flows into rectification filtering unit 10 through power resistor RT, power resistor RT, which can be limited, flows through rectification filtering unit 10
Electric current, so as to avoid rectification unit and filter unit because of heavy current impact and moment heats up and burns out.
Please continue to refer to Fig. 3, in one embodiment, above-mentioned control unit 40 includes first resistor R1, second resistance R2, the
Three resistance R3, the first electric capacity C1 and control chip U1, first resistor R1 first end are the voltage acquisition end of control unit 40, the
One resistance R1 the second end is connected with second resistance R2 first end, second resistance R2 the second end, the first of 3rd resistor R3
The supply pin VC interconnection at end, the first electric capacity C1 first end and control chip U1, the control chip U1 pin K that controls is control unit
40 control terminal, 3rd resistor R3 the second end and the first electric capacity C1 the second end are grounded.
Here, first resistor R1, second resistance R2 and 3rd resistor R3 form bleeder circuit, and it is applied to 3rd resistor R3
The voltage (being to fall the voltage in control chip U1 supply pins VC) at both ends exports direct current power source voltage with rectification filtering unit 10
Rise and increase, the first electric capacity C1 is used to gently be applied to the voltage waveform at 3rd resistor R3 both ends, prevents from being applied to the 3rd
The voltage instantaneous increase at resistance R3 both ends impacts.Reach above-mentioned first when rectification filtering unit 10 exports direct current power source voltage
During predeterminated voltage, the voltage triggered control chip U1 at 3rd resistor R3 both ends control pin K output high level signals are applied to.When
When the output direct current power source voltage of rectification filtering unit 10 is not up to above-mentioned first predeterminated voltage, 3rd resistor R3 both ends are applied to
Undertension is with trigger control chip U1, control chip U1 control pin K output low level signals.
Due to rectification filtering unit 10 export DC voltage be more than or equal to the first predeterminated voltage when, control chip U1
Control pin K output high level signal, rectification filtering unit 10 export DC voltage be less than the first predeterminated voltage when, control core
Piece U1 control pin K output high level signals.Therefore, this control unit 40 can export direct current according to rectification filtering unit 10
The voltage swing in source corresponds to the working condition of controlling switch unit 30.
Please continue to refer to Fig. 3, in one embodiment, above-mentioned switch element 30 includes the 4th resistance R4, the 5th resistance R5, the
One diode D1, the second diode D2, the first transistor Q1, the second electric capacity C2, relay J1 and the first power supply VCC, the second electricity
Hold C2 first end and the first diode D1 anode is connected with the first power supply VCC, the first diode D1 negative electrode, the two or two
The coil electrode interconnection of pole pipe D2 anode and relay J1, relay J1 common port G is the input of switch element 30, after
Electrical equipment J1 opened point M is the output end of switch element 30, relay J1 coil negative pole, the second diode D2 negative electrode and the
One transistor Q1 input interconnection；The first transistor Q1 controlled end, the 4th resistance R4 first end and the 5th resistance R5
First end interconnects, and the 4th resistance R4 the second end is the controlled end of switch element 30, the second electric capacity C2 the second end, first crystal
Pipe Q1 output end and the 5th resistance R5 the second end are grounded.
Here, the first transistor Q1 is chosen as NPN type triode, the base stage of NPN type triode is the first transistor Q1's
Controlled end, the current collection extremely the first transistor Q1 input of NPN type triode, the transmitting extremely first of NPN type triode are brilliant
Body pipe Q1 output end.
When the first transistor Q1 controlled end receives high level signal, the first transistor Q1 conductings, relay J1 lines
Circle negative pole is grounded by the first transistor Q1, and relay J1 common ports G is connected with opened point M, and switch element 30 turns on.When first
When transistor Q1 controlled end receives low level signal, the first transistor Q1 cut-offs, relay J1 common ports G and normally closed point N
Connection, switch element 30 end.
Please continue to refer to Fig. 3, in one embodiment, above-mentioned rectification filtering unit 10 includes rectifier bridge DB and the 3rd electric capacity
C3, rectifier bridge DB input are the input of rectification filtering unit 10, and rectifier bridge DB output end and the 3rd electric capacity C3 are just
Pole is connected, and its connecting node is the output end of rectification filtering unit 10, and the 3rd electric capacity C3 negative pole is grounded.
Referring to Fig. 4, in another embodiment, above-mentioned rectification filtering unit 10 includes the 3rd diode D3, the four or two pole
Pipe D4, the 4th electric capacity C4 and the 5th electric capacity C5, the 3rd diode D3 anode are connected with the 4th diode D4 negative electrode, the 4th electricity
The negative pole for holding C4 is connected with the 5th electric capacity C5 positive pole, the 3rd diode D3 and the 4th diode D4 connecting node and the 4th electricity
The connecting node for holding C4 and the 5th electric capacity C5 is the input of rectification filtering unit 10, the 3rd diode D3 negative electrode and the 4th electricity
Hold C4 positive pole connection, its connecting node is the output end of rectification filtering unit 10, the 4th diode D4 anode and the 5th electricity
The negative pole for holding C5 is grounded.
Specifically, when the high-voltage ac power of input is in positive half cycle, high-voltage ac power, the 3rd diode D3 and
Four electric capacity C4 form current loop, the 4th electric capacity C4 chargings；When the high-voltage ac power of input is in negative half period, high-voltage alternating
Power supply, the 5th electric capacity C5 and the 4th diode D4 form current loop, the 5th electric capacity C5 chargings.Because rectification filtering unit 10 is defeated
The direct current power source voltage gone out is the voltage for being added in the 4th electric capacity C4 both ends and the voltage sum for being added in the 5th electric capacity C5 both ends, therefore
The voltage that rectification filtering unit 10 exports dc source can reach the first predeterminated voltage more quickly.
Referring to Fig. 2, in one embodiment, this motor power circuit also includes switching power supply 50, Switching Power Supply list
The voltage acquisition end interconnection of first 50 input, the output end of rectification filtering unit 10 and control unit 40, switching power supply
50 output end is used to export power supply to motor.
Increase switching power supply 50, the dc source that rectification filtering unit 10 exports can be carried out at power conversion
Reason, so as to improve the efficiency of power subsystem.Here, the topological structure of switching power supply 50 be chosen as BUCK, BOOST etc. it is non-every
Release Switching Power Supply framework, also it is chosen as the isolation type switch power framework such as positive activation type, inverse-excitation type.The electricity of switching power supply 50
Line structure is not particularly limited herein.
It is noted that referring to Fig. 3, in one embodiment, above-mentioned motor power circuit also includes fuse F1, protect
Dangerous silk F1 is used for when the electric current of high-voltage ac power is more than predetermined current, cutoff high AC power and rectification filtering unit 10
Current path.So, the reliability of motor power circuit can further be improved.
Hereinafter, with reference to Fig. 1 to Fig. 4, the operation principle of this motor power circuit is illustrated：
First, motor power circuit is started working, and the voltage that rectification filtering unit 10 exports dc source is pre- less than second
If voltage, control unit 40 does not work, and switching power supply 50 does not also work, and the high-voltage ac power of input is successively through power electricity
Resistance RT and rectification filtering unit 10 export.
Then, the voltage of the output of rectification filtering unit 10 dc source reaches the second predeterminated voltage, and control unit 40 starts,
Switching power supply 50 starts, and the high-voltage ac power of input is successively through power resistor RT, rectification filtering unit 10 and switch electricity
Source unit 50 exports.
Finally, the voltage of the output of rectification filtering unit 10 dc source reaches the first predeterminated voltage, is added in 3rd resistor R3
Voltage (falling the voltage in control chip U1 supply pins VC) the trigger control chip U1 at both ends control pin K output high level letters
Number, the first transistor Q1 conductings, relay J1 coil negative pole is grounded through the first transistor Q1, relay J1 common port G with
Opened point M adhesives, the high-voltage ac power of input are defeated through relay J1, rectification filtering unit 10 and switching power supply 50 successively
Go out.
This motor power circuit at least has advantages below：
(1) when the voltage that rectification filtering unit 10 exports dc source reaches the second predeterminated voltage, control chip U1 is opened
It is dynamic；When the voltage that rectification filtering unit 10 exports dc source reaches the first predeterminated voltage, control chip U1 control relays
J1 common ports G and opened point M adhesives；Wherein, the second predeterminated voltage is less than the first predeterminated voltage.
Just relay J1 working condition is controlled when making control chip U1 stable, reliability is high.
(2) because the moment before relay J1 switchings, rectification filtering unit 10 have exported the voltage of dc source
Reach the first predeterminated voltage, therefore, moment rectification filtering unit 10 exports the voltage change of dc source before and after relay J1 switchings
Change very little, also very little, reliability are high for the impact to rectification filtering unit 10.
(3) after relay J1 switchings, the dc source rapid pressure of the output of rectification filtering unit 10, response speed
It hurry up.
(4) anti-electric current impact function, circuit structure only are achieved that with relay J1 and several inexpensive electronic components
Simply, cost is low.
The present invention also proposes a kind of washing machine, and the washing machine includes motor and motor power circuit as described above, the electricity
The concrete structure of electromechanical source circuit is with reference to above-described embodiment, because this washing machine employs whole technologies of above-mentioned all embodiments
Scheme, therefore all beneficial effects at least caused by the technical scheme with above-described embodiment, this is no longer going to repeat them.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in the scope of patent protection of the present invention.
Claims (9)
1. a kind of motor power circuit, it is characterised in that single including current limiting unit, rectification filtering unit, control unit and switch
Member；
The input of the current limiting unit is connected with the input of the switch element, and its connecting node is used to input high-voltage alternating
Power supply, the input interconnection of the output end of the current limiting unit, the output end of the switch element and the rectification filtering unit；
The voltage acquisition end of the output end of the rectification filtering unit and described control unit connects, the control terminal of described control unit with
The controlled end connection of the switch element；Wherein,
The rectification filtering unit, for being filtered processing to the high-voltage ac power of input, to export dc source as electricity
Machine is powered；
The current limiting unit, when the dc source for being exported in the rectification filtering unit is not up to the first predeterminated voltage, limit
System flows through the electric current of the rectification filtering unit；
Described control unit, when the dc source for being exported in the rectification filtering unit reaches first predeterminated voltage,
The conducting of the switch element is controlled, so that the dc source rapid pressure of rectification filtering unit output.
2. motor power circuit as claimed in claim 1, it is characterised in that the current limiting unit includes power resistor, described
The first end of power resistor is the input of the current limiting unit, and the second end of the power resistor is the defeated of the current limiting unit
Go out end.
3. motor power circuit as claimed in claim 1, it is characterised in that described control unit includes first resistor, second
Resistance, 3rd resistor, the first electric capacity and control chip, the first end of the first resistor are the voltage acquisition of described control unit
End, the second end of the first resistor is connected with the first end of the second resistance, the second end of the second resistance, described the
The supply pin interconnection of the first end of three resistance, the first end of first electric capacity and the control chip, the control chip
The control terminal that pin is described control unit is controlled, the second end of the second end of the 3rd resistor and first electric capacity connects
Ground.
4. motor power circuit as claimed in claim 1, it is characterised in that the switch element includes the 4th resistance, the 5th
Resistance, the first diode, the second diode, the first transistor, the second electric capacity, relay and the first power supply, second electric capacity
First end and the anode of first diode be connected with first power supply, it is the negative electrode of first diode, described
The coil electrode of the anode of second diode and the relay interconnects, and the common port of the relay is the switch element
Input, the opened point of the relay are the output end of the switch element, the coil negative pole of the relay, described second
The input of the negative electrode of diode and the first transistor interconnects；The controlled end of the first transistor, the 4th resistance
First end and the 5th resistance first end interconnection, the second end of the 4th resistance is controlled for the switch element
End, second end at the second end of second electric capacity, the output end of the first transistor and the 5th resistance is grounded.
5. motor power circuit as claimed in claim 1, it is characterised in that the rectification filtering unit includes rectifier bridge and the
Three electric capacity, the input of the rectifier bridge are the input of the rectification filtering unit, the output end of the rectifier bridge with it is described
The positive pole connection of 3rd electric capacity, its connecting node is the output end of the rectification filtering unit, and the negative pole of the 3rd electric capacity connects
Ground.
6. motor power circuit as claimed in claim 1, it is characterised in that the rectification filtering unit includes the three or two pole
Pipe, the 4th diode, the 4th electric capacity and the 5th electric capacity, the anode of the 3rd diode connect with the negative electrode of the 4th diode
Connect, the negative pole of the 4th electric capacity is connected with the positive pole of the 5th electric capacity, the 3rd diode and the 4th diode
Connecting node and the 4th electric capacity and the 5th electric capacity connecting node be the rectification filtering unit input, institute
The negative electrode for stating the 3rd diode is connected with the positive pole of the 4th electric capacity, and its connecting node is the output of the rectification filtering unit
End, the anode of the 4th diode and the negative pole of the 5th electric capacity are grounded.
7. motor power circuit as claimed in any one of claims 1 to 6, it is characterised in that the motor power circuit also wraps
Switching power supply is included, the input of the switching power supply, the output end of the rectification filtering unit and the control are single
The voltage acquisition end interconnection of member, the output end of the switching power supply are used to export power supply to motor.
8. motor power circuit as claimed in claim 1, it is characterised in that the motor power circuit also includes fuse,
The fuse be used for when the electric current of the high-voltage ac power is more than predetermined current, cut off the high-voltage ac power with it is whole
Flow the current path of filter unit.
A kind of 9. washing machine, it is characterised in that the motor power electricity including motor and as described in claim 1-8 any one
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710927330.9A CN107579654A (en) | 2017-09-30 | 2017-09-30 | Motor power circuit and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710927330.9A CN107579654A (en) | 2017-09-30 | 2017-09-30 | Motor power circuit and washing machine |
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| CN107579654A true CN107579654A (en) | 2018-01-12 |
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| CN201710927330.9A Pending CN107579654A (en) | 2017-09-30 | 2017-09-30 | Motor power circuit and washing machine |
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| CN206452295U (en) * | 2017-02-08 | 2017-08-29 | 中国长城科技集团股份有限公司 | A kind of power protecting circuit and power supply |
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| CN201328075Y (en) * | 2008-12-05 | 2009-10-14 | 深圳市瑞虹达电气有限公司 | Switch power supply |
| CN201439976U (en) * | 2009-05-25 | 2010-04-21 | 广东志高空调有限公司 | Suppressing circuit of surge current of inverter air conditioner |
| CN201504100U (en) * | 2009-07-02 | 2010-06-09 | 义乌市华晨机电有限公司 | Electrified anti-impact circuit |
| CN102044979A (en) * | 2009-10-15 | 2011-05-04 | 葛红远 | Voltage-doubling rectifying linear direct-current power supply |
| CN102118043A (en) * | 2009-12-31 | 2011-07-06 | 比亚迪股份有限公司 | Solar charger for charging power battery |
| CN102097850A (en) * | 2010-12-31 | 2011-06-15 | 东莞市奇立电源有限公司 | Method and device for controlling multiple safety protection and energy-saving charging |
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| CN202145567U (en) * | 2011-06-27 | 2012-02-15 | 中国国土资源航空物探遥感中心 | Starting-up protector for aviation electromagnetic instrument emission system |
| CN206452295U (en) * | 2017-02-08 | 2017-08-29 | 中国长城科技集团股份有限公司 | A kind of power protecting circuit and power supply |
| CN106933292A (en) * | 2017-05-05 | 2017-07-07 | 茂硕电源科技股份有限公司 | A kind of sequential control circuit |
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Application publication date: 20180112 |