CN209120084U - Motor start circuit, electric device and household electrical appliances - Google Patents
Motor start circuit, electric device and household electrical appliances Download PDFInfo
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- CN209120084U CN209120084U CN201821959113.4U CN201821959113U CN209120084U CN 209120084 U CN209120084 U CN 209120084U CN 201821959113 U CN201821959113 U CN 201821959113U CN 209120084 U CN209120084 U CN 209120084U
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Abstract
The utility model discloses a kind of motor start circuit, electric device and household electrical appliances, first switch module whether including for controlling electrical power and the processing module of switching drive signal is exported for comparing the size between input power and reference power source, the switching signal output end of processing module is serially connected with the control terminal of first switch module, and first switch module and motor joining are in power grid；The switching drive signal of first switch module can be connected by comparing the size between input power and reference power source and generation for the utility model, it is opened or closed so that motor is able to carry out, since input power is not associated with directly with power grid with reference power source, it can be avoided and the starting of motor is impacted when power grid fluctuates.
Description
Technical field
The utility model relates to electric field, especially a kind of motor start circuit, electric device and household electrical appliances.
Background technique
The quick start for how realizing motor makes motor not have the limitation of application, is that electromechanics trade is paid close attention to
One main problem.Traditional synchronous motor on startup, generally requires to introduce a starting current from power grid to motor, so that
Motor can normally start.But when power grid fluctuates, which is easy to be affected and motor is caused to be difficult to open
, there is the case where stall so as to cause motor often in dynamic and stable operation.It is often initial in motor in order to avoid such case
One instantaneous large-current is given when starting, to guarantee that the amplitude of starting current meets the starting requirement of motor, however, this is necessarily needed
The high power device more resistant to electric current is changed, in this way, not only increasing the volume of product, weight, further increases cost.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of motor start circuit, electric device and families
Electricity can be avoided and impact when power grid fluctuates to the starting of motor, therefore not need to provide moment for the starting of motor
High current, without replacing high power device.
The technical solution adopted by the utility model to solve the problem is as follows:
In a first aspect, the utility model provides a kind of motor start circuit, including for whether control electrical power
First switch module and the processing mould of switching drive signal is exported for comparing the size between input power and reference power source
Block, the switching signal output end of processing module are serially connected with the control terminal of first switch module, first switch module and motor joining
In power grid, switching drive signal is logic level signal.
Further, processing module includes exporting control signal for comparing the size between input power and reference power source
Signal processing module and for exporting the second switch module of switching drive signal according to control signal, signal processing mould
Block, second switch module and first switch module are sequentially connected in series.
It further, further include carrying out voltage conversion and halfwave rectifier for the AC power source to power grid and exporting the first sine
The pressure stabilizing rectification module of half-wave and the second half-sinusoid, the first half-sinusoid and the second half-sinusoid are separately input to signal processing
Module, the first half-sinusoid and the second half-sinusoid are the input power.
Further, signal processing module includes first comparator, and the first half-sinusoid is input to the anode of first comparator
End, reference power source are input to the negative pole end of first comparator, the output end of first comparator and the control terminal of second switch module
Concatenation.
Further, signal processing module includes the second comparator, and the second half-sinusoid is input to the cathode of the second comparator
End, reference power source are input to the positive terminal of the second comparator, the output end of the second comparator and the control terminal of second switch module
Concatenation.
Further, further include position for detecting rotor and the position detecting module of corresponding output signal be provided,
The signal output end of position detecting module is concatenated with second switch module.
Further, second switch module includes the first triode, the second triode and third transistor；First triode
Base stage and the base stage of the second triode are mutually concatenated with signal processing module respectively, the collector of the first triode and the second triode
Collector mutually concatenate and formed switching signal output end, switching signal output end is serially connected with working power, the first triode
The base stage of third transistor, the transmitting of the second triode are serially connected with after emitter and the connection of the signal output end of position detecting module
Pole is serially connected with after the collector of third transistor and mutually concatenates with working power, the emitter ground connection of third transistor.
Further, current limiting electricity is concatenated between the switching signal output end of processing module and the control terminal of first switch module
Resistance.
Second aspect, the utility model also proposed a kind of electric device, including at least one printed circuit board, it is described extremely
Motor start circuit as described above is laid on a few printed circuit board.
The third aspect, the utility model also proposed a kind of household electrical appliances, include electric device as described above.
The one or more technical solutions provided in the utility model embodiment, at least have the following beneficial effects: first
Switch module and motor joining are transmitted in power grid, therefore when the control terminal of first switch module is received by processing module
Switching drive signal when, whether first switch module is the energization of controllable motor, to realize the start-up operation to motor；
Since switching drive signal is to be exported by processing module according to the size between input power and reference power source, and switch
Driving signal is logic level signal, therefore when switching drive signal can't be fluctuated by power grid is influenced, so as to
It enough avoids power grid from impacting when fluctuating to the starting of motor, therefore does not need to provide moment big electricity for the starting of motor
Stream, without replacing high power device.
Detailed description of the invention
The utility model is described in further detail with example with reference to the accompanying drawing.
Fig. 1 is the schematic diagram for the motor start circuit that the utility model one embodiment provides；
Fig. 2 is the circuit diagram for the motor start circuit that another embodiment of the utility model provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.It should be noted that if do not conflicted, in the utility model embodiment
Each feature can be combined with each other, and both be within the protection scope of the present invention.
Traditional synchronous motor on startup, generally requires to introduce a starting current from power grid to motor, so that motor
Can normally it start.Since the starting current is obtained by power grid by the processing such as transformation, pressure stabilizing, the starting current and electricity
Electric current in net equally belongs to sine wave signal.When power grid fluctuates, which is easy to be affected and lead to it
Amplitude fluctuates, and when the amplitude of the starting current changes and the requirement of electric motor starting is not achieved, then will lead to motor
It is difficult to start and stable operation, occurs the case where stall often so as to cause motor.In order to avoid such case, often in electricity
One instantaneous large-current is given when machine initial start, to guarantee that the amplitude of starting current meets the starting requirement of motor, however, this
It is necessarily required to change the high power device more resistant to electric current, in this way, not only increasing the volume of product, weight, further increases cost.
Based on this, the utility model provides a kind of motor start circuit, electric device and household electrical appliances, according to input power with
Size between reference power source and export switching drive signal whether energization for controlling motor, and the switching drive signal
It for logic level signal, is not associated with directly with power grid, therefore can be avoided when power grid fluctuates and motor is opened
It is dynamic to impact.
With reference to the accompanying drawing, the utility model embodiment is further elaborated.
Referring to Fig.1, the first embodiment of the utility model provides a kind of motor start circuit, including for controlling motor
Be powered whether first switch module 100 and for compare the size between input power and reference power source and export switch driving
The processing module 200 of signal, the switching signal output end of processing module 200 are serially connected with the control terminal of first switch module 100, the
In power grid, the switching drive signal is logic level signal for one switch module 100 and motor joining.
In the present embodiment, since first switch module 100 and motor joining are in power grid, work as first switch module
When 100 control terminal receives the switching drive signal transmitted by processing module 200, first switch module 100 is i.e. controllable
Whether the energization of motor processed, to realize the starting to motor or shutoff operation；Since switching drive signal is by processing module
200 export according to the size between input power and reference power source, and switching drive signal is logic level signal, because
This switching drive signal is influenced when can't be fluctuated by power grid, to motor when so as to avoid power grid from fluctuating
Starting impact, therefore do not need to provide instantaneous large-current for the starting of motor, without replacing high power device.
In the present embodiment, the source of input power and reference power source can be there are many embodiment, for example, input electricity
Source can be provided by local power supply, can also be obtained after over commutation, filtering, pressure stabilizing by the AC power source of power grid；And join
Examining power supply can then be provided by local power supply, can also be obtained by working power by resistance pressure-dividing network.No matter input electricity
Source and the source of reference power source are where, as long as input power and reference power source can meet the power requirement of processing module 200
?.In addition, the level value of reference power source can be selected according to practical situation, for example, when input power is from electricity
When obtaining in net, and input power follows the fluctuation of power grid and fluctuates, at this point, the level value of reference power source selects to meet
The following conditions: greater than the waveform portion of the level value of reference power source in input power, the minimum level value occurred due to fluctuation,
Greater than the level value of reference power source.In addition, processing module 200 can also there are many embodiments, for example, processing module 200 can
Think single-chip microcontroller, or the combination of comparator circuit and switching circuit.In addition, first switch module 100 can also have it is more
Kind embodiment, for example, first switch module 100 can be bi-directional thyristor switch, or relay, but it is preferably double
To reverse-blocking tetrode thyristor.When first switch module 100 is using bi-directional thyristor switch, bi-directional thyristor switch directly with power grid
AC power source is connected with any level in the stator winding of motor.When the control terminal of bi-directional thyristor switch is in low level
When, bi-directional thyristor switch can be switched on, so that motor works；When the control terminal of bi-directional thyristor switch is in height
When level, bi-directional thyristor switch shutdown, motor stops working.
Further, based on the above embodiment, the second embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, wherein processing module 200 includes exporting the letter for controlling signal for comparing the size between input power and reference power source
Number processing module 210 and second switch module 220 for exporting switching drive signal according to control signal, signal processing mould
Block 210, second switch module 220 and first switch module 100 are sequentially connected in series.
In the present embodiment, signal processing module 210 can be carried out input power therein is input to reference power source
Compare, and exports control signal to second switch module 220 according to the result of the comparison.Signal processing module 210 can have more
Kind embodiment, for example, signal processing module 210 can be comparator circuit, or by transistor circuit and/or logic
The comparison circuit that gate circuit is composed can also be the processing chip with comparison circuit.210 pairs of signal processing module inputs
Power supply is compared there are many embodiment with reference power source, for example, signal processing module 210 can compare input power and ginseng
The voltage value size between power supply is examined, the current value size between input power and reference power source can also be compared, it can also be same
When compare voltage value size and current value size between input power and reference power source.And signal processing module 210 according to than
Compared with result and export control signal, can also have different embodiments: for example, the voltage value of input power be greater than with reference to electricity
The voltage value in source, signal processing module 210 export high level；The voltage value of input power is less than the voltage value of reference power source, letter
Number processing module 210 exports low level.For another example, the current value of input power is greater than the current value of reference power source, signal processing mould
Block 210 exports high level；The current value of input power is less than the current value of reference power source, and signal processing module 210 exports low electricity
It is flat.
In addition, in the present embodiment, second switch module 220 is according to the control signal exported by signal processing module 210
And switching drive signal is exported to first switch module 100, and second switch module 220 can also have different embodiments,
For example, second switch module 220 can be the switching circuit being made of multiple triodes, or opened by what relay formed
Powered-down road.
Further, based on the above embodiment, the 3rd embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, the motor start circuit further include carrying out voltage conversion and halfwave rectifier for the AC power source to power grid and exporting first just
The pressure stabilizing rectification module 300 of string half-wave and the second half-sinusoid, the first half-sinusoid and the second half-sinusoid are separately input to letter
Number processing module 210, the first half-sinusoid and the second half-sinusoid are the input power.In the present embodiment, pressure stabilizing
Rectification module 300 can be integrated pressure stabilizing rectification chip, or the combination of voltage regulator circuit and rectification circuit.Wherein, surely
Rectification processing in repoussage flow module 300 is preferentially handled using halfwave rectifier, therefore can be distinguished the AC power source in power grid
Sinusoidal positive half-wave and sinusoidal negative half-wave are extracted, i.e. pressure stabilizing rectification module 300 can export the first half-sinusoid and second sinusoidal half
Wave makes full use of so as to the AC power source to power grid, improves the utilization rate of the energy.
Further, based on the above embodiment, the fourth embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, wherein signal processing module 210 includes first comparator LM1, and the first half-sinusoid is being input to first comparator LM1 just
Extremely, reference power source is input to the negative pole end of first comparator LM1, the output end and second switch module of first comparator LM1
220 control terminal concatenation.
In the present embodiment, first comparator LM1 can carry out copped wave processing to the first half-sinusoid.First half-sinusoid
Compared with reference power source carries out level value among first comparator LM1, when the current potential of the first half-sinusoid is higher than reference power source
Level value when, first comparator LM1 export high level；When the current potential of the first half-sinusoid is lower than the level value of reference power source
When, first comparator LM1 exports low level.Therefore, first comparator LM1 can be with the cyclically-varying of the first half-sinusoid
And square-wave signal is exported, so as to carry out drive control to second switch module 220.In addition, reference power source can be by working
Power supply is obtained by resistance pressure-dividing network, therefore, when adjusting the correspondence resistance value in the resistance pressure-dividing network, can be changed
By the width of the first comparator LM1 square-wave signal exported, so as to realize the flexible control of signal.
Further, it is based on 3rd embodiment, the 5th embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, wherein signal processing module 210 includes the second comparator LM2, and the second half-sinusoid is input to the negative of the second comparator LM2
Extremely, reference power source is input to the positive terminal of the second comparator LM2, the output end and second switch module of the second comparator LM2
220 control terminal concatenation.
In the present embodiment, signal processing module 210 further includes the 4th triode S1, and the 4th triode S1 is preferably
PNP triode.Second half-sinusoid is input to the base stage of the 4th triode S1, and the emitter of the 4th triode S1 is serially connected with
It is mutually concatenated after the negative pole end of two comparator LM2 with working power, the grounded collector of the 4th triode S1.Second half-sinusoid is first
It first passes through the 4th triode S1 to carry out scabbling enhanced processing, then be carried out under the action of the second comparator LM2 with reference power source
Compare.When the current potential of the second half-sinusoid is higher than the level value of reference power source, the second comparator LM2 exports low level；When
When the current potential of two half-sinusoids is lower than the level value of reference power source, the second comparator LM2 exports high level.Therefore, second compares
Device LM2 can export square-wave signal with the cyclically-varying of the second half-sinusoid, so as to second switch module 220
Carry out drive control.In addition, reference power source can be obtained by working power by resistance pressure-dividing network, it therefore, should when adjusting
When correspondence resistance value in resistance pressure-dividing network, the width of the square-wave signal by the second comparator LM2 output can be changed, thus
It can be realized the flexible control of signal.
Further, it is based on 3rd embodiment, the sixth embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, wherein sixth embodiment is respectively compared with fourth embodiment and the 5th embodiment, and difference is: in sixth embodiment simultaneously
Including first comparator LM1 and the second comparator LM2, and in the peripheral circuit and fourth embodiment of first comparator LM1
The peripheral circuit of first comparator LM1 is consistent, and the peripheral circuit of the second comparator LM2 is compared with second in the 5th embodiment
The peripheral circuit of device LM2 is consistent.
In the present embodiment, first comparator LM1 and the second comparator LM2 is respectively at mutually independent two circuits
In, but opened simultaneously second by the first comparator LM1 square-wave signal exported and by the square-wave signal of the second comparator LM2 output
It closes module 220 and carries out drive control.
Further, it is based on second embodiment, the 7th embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, the motor start circuit further include the position for detecting rotor and provide the position detecting module of corresponding output signal
400, the signal output end of position detecting module 400 is concatenated with second switch module 220.
In the present embodiment, position detecting module 400 can there are many embodiments, for example, position detecting module 400 can
Think Hall sensor, or the combination of angular transducer and single-chip microcontroller can also be rotary encoder and single-chip microcontroller
Combination, but preferably Hall sensor.Preferably, the horizontal axis which is set to stator in motor leans on
On the position of nearly rotor circumference, therefore position detecting module 400 can detect the position of rotor according to the variation in magnetic field, and
Among one signal to second switch module 220 of corresponding output.Therefore, position detecting module 400 can be with second switch module
220 cooperate and export switching drive signal to first switch module 100, so that the on-off of first switch module 100 is controlled,
Realize to motor starting or shutoff operation.Since switching drive signal is in position detecting module 400 and second switch mould
It is generated under the mating reaction of block 220, therefore when switching drive signal can't be fluctuated by power grid is influenced, so as to
Power grid is enough avoided to impact when fluctuating to the starting of motor.
Further, based on the above embodiment, the 8th embodiment of the utility model additionally provides a kind of electric motor starting electricity
Road, wherein second switch module 220 includes the first triode S2, the second triode S3 and third transistor S4；First triode
The base stage of S2 and the base stage of the second triode S3 are concatenated with 210 phase of signal processing module respectively, the collector of the first triode S2
Switching signal output end is mutually concatenated and formed with the collector of the second triode S3, and switching signal output end is serially connected with work electricity
Source, the emitter of the first triode S2 are serially connected with third transistor S4 after connecting with the signal output end of position detecting module 400
Base stage, the emitter of the second triode S3 is serially connected with after the collector of third transistor S4 and mutually concatenates with working power, third
The emitter of triode S4 is grounded.
In the present embodiment, signal processing module 210 can export two control signals, and the two control signals are distinguished
It is input to the base stage of the first triode S2 and the base stage of the second triode S3.When two control signals are low level, no matter
The signal that position detecting module 400 exports is high level or low level, and the first triode S2 and the second triode S3, which are in, to be cut
Only state, therefore switching signal output end can export high level, i.e. the control terminal of first switch module 100 is in high level shape
State, first switch module 100 turn off, and motor does not work.It is one high and one low that the level value of signal is controlled when two, and works as position
The level value for the signal that detection module 400 exports is consistent with the control level value of signal of base stage for being input to the second triode S3
When, switching signal output end can export low level, i.e. the control terminal of first switch module 100 is in low level state, and first opens
It closes module 100 to be connected, motor works.Therefore, because switching drive signal is in two control signals and by position detection
It is generated under the mutual cooperation effect for the signal that module 400 exports, therefore switching drive signal can't be occurred by power grid
Influence when fluctuation impacts the starting of motor when so as to avoid power grid from fluctuating.
Further, it is based on any of the above-described embodiment, the 9th embodiment of the utility model additionally provides a kind of motor and opens
Dynamic circuit, wherein concatenated between the switching signal output end of processing module 200 and the control terminal of first switch module 100 limited
Leakage resistance 110.In the present embodiment, current-limiting resistance 110 can signal to the control terminal for being transferred to first switch module 100 into
Row current limliting avoids the electric current for the control terminal for being transferred to first switch module 100 excessive and causes to burn first switch module 100
Problem, to ensure that the normal work of first switch module 100.
In addition, the tenth embodiment of the utility model additionally provides a kind of motor start circuit referring to Fig. 2.The motor opens
Dynamic circuit includes first switch module 100, pressure stabilizing rectification module 300, first comparator LM1, the second comparator LM2, position inspection
Survey module 400, the first triode S2, the second triode S3 and third transistor S4.Wherein, pressure stabilizing rectification module 300 respectively to
The negative pole end of the positive terminal of first comparator LM1 and the second comparator LM2 transmit the first half-sinusoid and the second half-sinusoid, the
The positive terminal of the negative pole end of one comparator LM1 and the second comparator LM2 are connected to reference power source, first comparator LM1's
The output end of output end and the second comparator LM2 are connected to the base stage of the first triode S2 and the base of the second triode S3
Pole；The collector of the collector of first triode S2 and the second triode S3 mutually concatenate and are formed switching signal output end, switch
Signal output end is serially connected with working power, and the emitter of the first triode S2 and the signal output end of position detecting module 400 connect
The base stage of third transistor S4 is serially connected with after connecing, after the emitter of the second triode S3 is serially connected with the collector of third transistor S4
It is mutually concatenated with working power, the emitter ground connection of third transistor S4；In addition, switching signal output end also passes through current-limiting resistance
110 are connected to the control terminal of first switch module 100, and first switch module 100 and motor joining are in power grid.
In the present embodiment, first switch module 100 and motor joining are in power grid, therefore work as first switch module 100
Control terminal when receiving the switching drive signal transmitted by switching signal output end, first switch module 100 is i.e. controllable
Whether the energization of motor processed, to realize the start-up operation to motor；Since switching drive signal is by first comparator
The logic electricity that the mutual cooperation effect for the signal that LM1, the second comparator LM2 and position detecting module 400 are exported is lower and generates
Ordinary mail number, and the electric current very little of the switching drive signal of the on-off for being used to control first switch module 100, therefore even if
Also it is easier starting motor in certain fluctuation range of power grid and motor even running can be made, stability is high.Simultaneously as not
Need to provide conventional synchronization motor the instantaneous large-current required in initial start, thus the circuit of the present embodiment do not need using
High-power switch device, therefore can be avoided and increase circuit volume and weight, the increase of cost is avoided, high reliablity is conducive to
It promotes.
In addition, the 11st embodiment of the utility model additionally provides a kind of electric device, which includes at least
One printed circuit board is laid with the electric motor starting electricity of any embodiment as described above at least one described printed circuit board
Road, therefore, the electric device can be realized the function that motor start circuit has in any embodiment as described above.
In the present embodiment, the motor start circuit can be laid in a printed circuit board；In addition, the motor
Start-up circuit can also be modules according to achieved function division, and each module, which respectively corresponds, is laid in a printing
On circuit board, and it can be electrically connected by winding displacement, row needle and connectivity port etc. between each printed circuit board.
In addition, in the present embodiment, the printed circuit board can be single sided board, double plate faces or multilayer circuit board；In addition,
The printed circuit board can be for by phenolic paper laminate, epoxy paper-based laminate, polyester fiberglass carpet veneer pressing plate or epoxy glass
The rigid circuit board that glass cloth laminated board is constituted, or by polyester film, Kapton or fluorinated ethylene propylene (FEP) film structure
At flexible circuit board.
In addition, the 12nd embodiment of the utility model additionally provides a kind of household electrical appliances, which includes as described above
Electric device.In the present embodiment, the motor start circuit which can be realized in any embodiment as described above is had
Function.In addition, the household electrical appliances in the present embodiment are not limited to a certain specific equipment, which can be washing machine, wash the dishes
Machine, floor-cleaning machine or sweeper etc..
Be above to the utility model it is preferable implementation illustrated, but the utility model be not limited to it is above-mentioned
Embodiment, those skilled in the art can also make various be equal without departing from the spirit of the present invention
Deformation or replacement, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. a kind of motor start circuit, it is characterised in that: including for controlling first switch module and use whether electrical power
The processing module of switching drive signal is exported in the size compared between input power and reference power source, the processing module
Switching signal output end is serially connected with the control terminal of the first switch module, and the first switch module and motor joining are in power grid
In, the switching drive signal is logic level signal.
2. motor start circuit according to claim 1, it is characterised in that: the processing module includes for comparing input
Size between power supply and reference power source and export the signal processing module of control signal and for according to the control signal and
Export switching drive signal second switch module, the signal processing module, second switch module and first switch module according to
Secondary concatenation.
3. motor start circuit according to claim 2, it is characterised in that: further include for the AC power source to power grid into
The conversion of row voltage and halfwave rectifier and export the pressure stabilizing rectification module of the first half-sinusoid and the second half-sinusoid, described first just
String half-wave and the second half-sinusoid are separately input to the signal processing module, first half-sinusoid and the second half-sinusoid
The as input power.
4. motor start circuit according to claim 3, it is characterised in that: the signal processing module compares including first
Device, the first half-sinusoid are input to the positive terminal of the first comparator, and reference power source is input to the negative of the first comparator
Extremely, the output end of the first comparator is concatenated with the control terminal of the second switch module.
5. motor start circuit according to claim 3, it is characterised in that: the signal processing module compares including second
Device, the second half-sinusoid are input to the negative pole end of second comparator, and reference power source is being input to second comparator just
Extremely, the output end of second comparator is concatenated with the control terminal of the second switch module.
6. motor start circuit according to claim 2, it is characterised in that: further include the position for detecting rotor
And the position detecting module of corresponding output signal is provided, the signal output end of the position detecting module and the second switch mould
Block concatenation.
7. motor start circuit according to claim 6, it is characterised in that: the second switch module includes the one or three pole
Pipe, the second triode and third transistor；The base stage of first triode and the base stage of the second triode respectively with the letter
Number processing module mutually concatenates, and the collector of first triode and the collector of the second triode are mutually concatenated and formed described
Switching signal output end, the switching signal output end are serially connected with working power, the emitter of first triode with it is described
The base stage of the third transistor, the transmitting of second triode are serially connected with after the signal output end connection of position detecting module
Pole is serially connected with after the collector of the third transistor and mutually concatenates with working power, the emitter ground connection of the third transistor.
8. -7 any motor start circuit according to claim 1, it is characterised in that: the switching signal of the processing module
Current-limiting resistance is serially connected between output end and the control terminal of the first switch module.
9. a kind of electric device, it is characterised in that: including at least one printed circuit board, at least one described printed circuit board
It lays just like the described in any item motor start circuits of claim 1-8.
10. a kind of household electrical appliances, it is characterised in that: include electric device as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821959113.4U CN209120084U (en) | 2018-11-26 | 2018-11-26 | Motor start circuit, electric device and household electrical appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821959113.4U CN209120084U (en) | 2018-11-26 | 2018-11-26 | Motor start circuit, electric device and household electrical appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209120084U true CN209120084U (en) | 2019-07-16 |
Family
ID=67206578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821959113.4U Withdrawn - After Issue CN209120084U (en) | 2018-11-26 | 2018-11-26 | Motor start circuit, electric device and household electrical appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209120084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379001A (en) * | 2018-11-26 | 2019-02-22 | 汉宇集团股份有限公司 | Motor start circuit, electric device and household electrical appliances |
-
2018
- 2018-11-26 CN CN201821959113.4U patent/CN209120084U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109379001A (en) * | 2018-11-26 | 2019-02-22 | 汉宇集团股份有限公司 | Motor start circuit, electric device and household electrical appliances |
| CN109379001B (en) * | 2018-11-26 | 2024-01-09 | 汉宇集团股份有限公司 | Motor starting circuit, electric device and household appliance |
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Granted publication date: 20190716 Effective date of abandoning: 20240109 |