CN106655970A - Washing machine and motor control system thereof - Google Patents
Washing machine and motor control system thereof Download PDFInfo
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- CN106655970A CN106655970A CN201611123626.7A CN201611123626A CN106655970A CN 106655970 A CN106655970 A CN 106655970A CN 201611123626 A CN201611123626 A CN 201611123626A CN 106655970 A CN106655970 A CN 106655970A
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- 238000005406 washing Methods 0.000 title claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 47
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000005611 electricity Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 6
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 description 7
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 4
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/36—Electric signal transmission systems using optical means to covert the input signal
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a washing machine and a motor control system thereof. The motor control system comprises a communication module, a control chip and a motor frequency converter, wherein the communication module is provided with a photo coupler isolation unit; the control chip is connected with the communication module and outputs a control signal through the communication module; the motor frequency converter is connected with the motor and the communication module separately; and the motor frequency converter receives the control signal output by the control chip through the communication module, controls the motor according to the control signal, generates a feedback signal according to the state of the motor and transmits the feedback signal to the control chip through the communication module, so that a strong current area is isolated from a weak current area by using a photo coupler, a separate design of strong current and weak current is achieved and the circuit reliability is improved.
Description
Technical field
The present invention relates to communication technical field, the electric machine control system of more particularly to a kind of washing machine and a kind of laundry
Machine.
Background technology
In correlation technique, the telecommunication circuit great majority between control chip and BLDC motor inverters are not isolated,
That is, it is connected with the forceful electric power (300VDC) of BLDC motor inverters the light current (5VDC) of control chip.But, in reality
In use, 300VDC be live wire, zero line as obtained by rectifier bridge shaping, forceful electric power ground is natural to be communicated with Live line Zero line, therefore forceful electric power
Ground is connected for a long time with light current ground, mainboard appearance is short-circuit, the abnormal conditions such as make moist when, forceful electric power can be directly entered light current region, lead
Light current region is caused to burn out.
Therefore, correlation exists improved needs.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this purpose, the present invention
One purpose is to propose a kind of electric machine control system of washing machine, can realize strong and weak electricity separate design, improves circuit reliability
Property.
To reach above-mentioned purpose, one aspect of the present invention proposes a kind of electric machine control system of washing machine, including：Communication mould
Block, the communication module has light-coupled isolation unit；Control chip, the control chip is connected with the communication module, described
Control chip is by the communication module output control signal；Motor inverter, the motor inverter respectively with the motor
It is connected with the communication module, the motor inverter receives the control letter of the control chip output by the communication module
Number, and the motor is controlled according to the control signal, and feedback signal is generated simultaneously according to the state of the motor
The feedback signal is sent into the control chip by the communication module.
According to the electric machine control system of washing machine proposed by the present invention, communication module has light-coupled isolation unit, and motor becomes
Frequency device receives the control signal of control chip output by communication module, and motor is controlled according to control signal, and
Feedback signal is generated according to the state of motor and feedback signal is sent into control chip by communication module, so as to using light
Forceful electric power area is separated and is left by coupling with light current, realizes the separate design of strong and weak electricity, improves circuit reliability.
Further, there is the control chip speed to set end with output speed setting signal, the communication module bag
Speed setting unit is included, the speed setting unit includes：First receiving circuit, first receiving circuit and the control core
The speed setting end of piece is connected, and first receiving circuit is used to receive the rate setting signal；First opto-coupler chip, it is described
First opto-coupler chip has illuminating part and light accepting part, the illuminating part of first opto-coupler chip and the first receiving circuit phase
Even；First output circuit, first output circuit respectively with the light accepting part and the motor frequency conversion of first opto-coupler chip
First signal input part of device is connected, and first output circuit is used to be set by first opto-coupler chip reception speed
Determine signal, and the rate setting signal is changed the rate setting signal after conversion to be exported to the motor frequency conversion
First signal input part of device.
Further, first receiving circuit includes：First triode, base stage and the control of first triode
The speed setting end of coremaking piece is connected, and the emitter stage of first triode is connected with the earth terminal of the first default power supply；First
Resistance, one end of the first resistor is connected with the colelctor electrode of first triode, the other end of the first resistor and institute
The one end for stating the illuminating part of the first opto-coupler chip is connected, and the other end of the illuminating part of first opto-coupler chip is pre- with described first
If the power end of power supply is connected；Second resistance, the second resistance is connected in parallel with the illuminating part of first opto-coupler chip.
Further, first output circuit includes：3rd resistor, one end of the 3rd resistor and first light
One end of the light accepting part of coupling chip is connected, the power supply of the other end of the light accepting part of first opto-coupler chip and the second default power supply
End is connected；4th resistance, one end of the 4th resistance is connected and with first node, institute with the other end of the 3rd resistor
The other end for stating the 4th resistance is connected with the earth terminal of the described second default power supply；5th resistance, one end of the 5th resistance
It is connected with the first node；6th resistance, one end of the 6th resistance is connected and has with the other end of the 5th resistance
Have a Section Point, the other end of the 6th resistance is connected with the earth terminal of the described second default power supply, the Section Point and
First signal input part of the motor inverter is connected；First electric capacity, the first electric capacity is connected with the 6th resistor coupled in parallel；The
One electrochemical capacitor, first electrochemical capacitor is connected in parallel with first electric capacity.
Further, the motor inverter has signal output part with output speed feedback signal, the communication module
Including velocity feedback unit, the velocity feedback unit includes：Second receiving circuit, second receiving circuit and the motor
The signal output part of frequency converter is connected, and second receiving circuit is used to receive the feedback speed signal；Second opto-coupler chip,
Second opto-coupler chip has illuminating part and light accepting part, the illuminating part of second opto-coupler chip and second receiving circuit
It is connected；Second output circuit, second output circuit respectively with the light accepting part and the control core of second opto-coupler chip
The velocity feedback end of piece is connected, and second output circuit is used to receive the velocity feedback letter by second opto-coupler chip
Number, and the feedback speed signal is changed to export the feedback speed signal after conversion to the speed of the control chip
Degree feedback end.
Further, second receiving circuit includes：7th resistance, one end of the 7th resistance becomes with the motor
The signal output part of frequency device is connected；8th resistance, one end of the 8th resistance is connected with the other end of the 7th resistance, institute
State the other end of the 8th resistance to be connected with the power end of the second default power supply, the 8th resistance also with second opto-coupler chip
Illuminating part be connected in parallel；Second electric capacity, second electric capacity is connected with the 8th resistor coupled in parallel.
Further, second output circuit includes：9th resistance, one end and second light of the 9th resistance
One end of the light accepting part of coupling chip is connected, and the other end of the 9th resistance is connected with the power end of the first default power supply, described
The other end of the light accepting part of the second opto-coupler chip is connected with the earth terminal of the described first default power supply；Tenth resistance, the described tenth
One end of resistance is connected with the other end of the 9th resistance, the other end of the tenth resistance and the speed of the control chip
Feedback end is connected；3rd electric capacity, described one end of 3rd electric capacity is connected with the velocity feedback end of the control chip, and the described 3rd
The other end of electric capacity is connected with the earth terminal of the described first default power supply.
Further, the control chip has rotating control end to export rotating control signal, the communication mould
Block includes rotating control unit, and the rotating control unit includes：3rd receiving circuit, the 3rd receiving circuit and institute
The rotating control end for stating control chip is connected, and the 3rd receiving circuit is used to receive the rotating control signal；3rd
Opto-coupler chip, the 3rd opto-coupler chip has illuminating part and light accepting part, the illuminating part of the 3rd opto-coupler chip and described
Three receiving circuits are connected；3rd output circuit, the 3rd output circuit respectively with the light accepting part of the 3rd opto-coupler chip and
The secondary signal input of the motor inverter is connected, and the 3rd output circuit is used to be connect by the 3rd opto-coupler chip
Receive the rotating control signal, and the rotating control signal is changed with by the rotating control signal after conversion
Export to the secondary signal input of the motor inverter.
Further, the 3rd receiving circuit includes：Second triode, base stage and the control of second triode
The rotating control end of coremaking piece is connected, and the emitter stage of second triode is connected with the earth terminal of the first default power supply；The
11 resistance, one end of the 11st resistance is connected with the colelctor electrode of second triode, the 11st resistance it is another
One end is connected with one end of the illuminating part of the 3rd opto-coupler chip, the other end of the illuminating part of the 3rd opto-coupler chip and institute
The power end for stating the first default power supply is connected；12nd resistance, the 12nd resistance is luminous with the 3rd opto-coupler chip
Portion is connected in parallel.
Further, the 3rd output circuit includes：13rd resistance, one end of the 13rd resistance and described
One end of the light accepting part of three opto-coupler chips is connected, and the other end of the light accepting part of the 3rd opto-coupler chip and second presets power supply
Earth terminal is connected；14th resistance, one end of the 14th resistance is connected and has with the other end of the 13rd resistance
3rd node, the other end of the 14th resistance is connected with the power end of the described second default power supply；15th resistance, it is described
One end of 15th resistance is connected respectively with the secondary signal input of the 3rd node and the motor inverter, and described
The other end of 15 resistance is connected with the earth terminal of the described second default power supply.
To reach above-mentioned purpose, another aspect of the present invention proposes a kind of washing machine, including the motor of described washing machine
Control system.
According to washing machine proposed by the present invention, by the electric machine control system of above-mentioned washing machine, can be incited somebody to action using optocoupler
Forceful electric power area separates with light current to be left, and realizes the separate design of strong and weak electricity, improves circuit reliability.
Description of the drawings
Fig. 1 is the block diagram of the electric machine control system of washing machine according to embodiments of the present invention；And
Fig. 2 is the circuit theory diagrams of the electric machine control system of washing machine according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings describing the electric machine control system of the washing machine of the embodiment of the present invention and with the system
Washing machine.
Fig. 1 is the block diagram of the electric machine control system of washing machine according to embodiments of the present invention.As shown in figure 1, should
The electric machine control system of washing machine includes：Communication module 10, control chip 20 and motor inverter 30.
Wherein, communication module 10 has light-coupled isolation unit 101；Control chip 20 is connected with communication module 10, controls core
Piece 20 passes through the output control signal of communication module 10；Motor inverter 30 is connected respectively with motor 40 and communication module 50, motor
Frequency converter 30 receives the control signal of the output of control chip 20 by communication module 10, and motor 40 is carried out according to control signal
Control, and feedback signal is generated according to the state of motor 40 and feedback signal is sent into control chip by communication module 10
20。
It should be noted that motor inverter 30 is by high voltage supply such as 300VDC, while 300VDC and Live line Zero line phase
It is logical, that is, say that motor inverter as shown in Figure 2 30 belongs to forceful electric power region A, control chip 20 is powered by low pressure such as 5VDC, i.e.,
Say that control chip as shown in Figure 2 20 belongs to light current region B.
That is, the control signal of the output of control chip 20 can be transmitted to motor frequency conversion by light-coupled isolation unit 101
Device 30, so that motor inverter 30 is driven to motor 40, and the feedback signal of the output of motor inverter 30 equally can pass through
Light-coupled isolation unit 101 is transferred to control chip 20, so that control chip 20 obtains the state of motor 40 and according to motor 40
State generates control signal.Thus, light current region can will can be opened with forceful electric power zone isolation by light-coupled isolation unit 101, it is real
Show the separate design of strong and weak electricity, improve the reliability of circuit.
A specific example of the invention, motor 40 can for BLDC (Brushless Direct Current, it is brushless
Direct current) motor.
According to one embodiment of present invention, as shown in Fig. 2 there is control chip speed setting end A1 to be set with output speed
Determine signal, communication module 10 includes speed setting unit 11, and speed setting unit 11 includes：First receiving circuit 110, the first light
Coupling chip U1 and the first output circuit 112.
Wherein, the first receiving circuit 110 is connected with the speed setting end A1 of control chip 20, and the first receiving circuit 110 is used
In reception rate setting signal；First opto-coupler chip U1 has illuminating part and a light accepting part, the illuminating part of the first opto-coupler chip U1 with
First receiving circuit 110 is connected；First output circuit 112 respectively with the light accepting part and motor inverter 30 of the first opto-coupler chip U1
The first signal input part Vsp be connected, the first output circuit 112 is used to receive speed setting letter by the first opto-coupler chip U1
Number, and rate setting signal is changed to export the rate setting signal after conversion to the first letter of motor inverter 30
Number input Vsp.
Specifically, as shown in Fig. 2 the first receiving circuit 110 includes：First triode Q1, first resistor R1 and second are electric
Resistance.Wherein, the base stage of the first triode Q1 is connected with the speed setting end A1 of control chip 20, the emitter stage of the first triode Q1
It is connected with the earth terminal GND1 of the first default power supply；One end of first resistor R1 is connected with the colelctor electrode of the first triode Q1, the
The other end of one resistance R1 is connected with one end of the illuminating part of the first opto-coupler chip U1, the illuminating part of the first opto-coupler chip U1 it is another
One end is connected with the power end VDD1 of the first default power supply；Second resistance R2 is in parallel with the illuminating part of the first opto-coupler chip U1 even
Connect.
Wherein, the first default power supply can be 5V dc sources, and first presets the power end VDD1 and earth terminal GND1 of power supply
Between pressure reduction be 5V.Wherein, for low-pressure section it is light current region between the power end and earth terminal GND1 of the first default power supply.
Specifically, as shown in Fig. 2 the first output circuit 112 includes：3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th resistance R6, the first electric capacity C1 and the first electrochemical capacitor EC1.
Wherein, one end of 3rd resistor R3 is connected with one end of the light accepting part of the first opto-coupler chip U1, the first opto-coupler chip
The other end of the light accepting part of U1 is connected with the power end VDD2 of the second default power supply；One end of 4th resistance R4 and 3rd resistor R3
The other end be connected and with first node, the earth terminal GND2 that the other end of the 4th resistance R4 presets power supply with second is connected；
One end of 5th resistance R5 is connected with first node；One end of 6th resistance R6 is connected and has with the other end of the 5th resistance R5
Section Point, the other end of the 6th resistance R6 is connected with the earth terminal GND2 of the second default power supply, Section Point and motor frequency conversion
First signal input part Vsp of device 30 is connected；First electric capacity C1 and the 6th resistance R6 is connected in parallel；First electrochemical capacitor EC1 with
First electric capacity C1 is connected in parallel.
Wherein, the second default power supply can be 15V dc sources, and second presets the power end VDD2 and earth terminal GND2 of power supply
Between pressure reduction be 15V.
A specific example of the invention, as shown in Fig. 2 the power end Vcc and the 3rd of motor inverter 30 presets
The power end of power supply is connected, and the 3rd default power supply can be 300V dc sources, and the 3rd default power supply can be total to the second default power supply
Ground, the pressure reduction between the power end and earth terminal GND2 of the 3rd default power supply is 300V.Wherein, the power end of the 3rd default power supply
For high-pressure section it is forceful electric power region between earth terminal GND2.
Specifically, control chip 20 can set end A1 output speed pwm control signals, speed setting unit by speed
11 can change to speed pwm control signal, and the speed pwm control signal after conversion is sent to motor inverter 30
First signal input part Vsp, so as to realize the control of the speed to motor 40.More specifically, when speed pwm control signal is in
During high level, the first triode Q1 conductings, the voltage at second resistance R2 two ends causes the illuminating part of the first opto-coupler chip U1 to launch
Light, the light accepting part conducting of the first opto-coupler chip U1, the power end of 3rd resistor R3 and the 4th resistance R4 to the second default power supply
After the voltage of VDD2, branch pressure voltage is provided to motor inverter 30 again after the 5th resistance R5 and the 6th resistance R6 partial pressures
The first signal input part Vsp；When speed pwm control signal is in low level, the first triode Q1 shut-offs, second resistance R2
The voltage at two ends is zero so that the illuminating part of the first opto-coupler chip U1 stops transmitting light, the light accepting part of the first opto-coupler chip U1
Shut-off, the first output circuit 112 provides the first signal input part Vsp of no-voltage to motor inverter 30.Thus, speed setting
Unit 11 will be transferred to the first signal input part Vsp of motor inverter 30 after the conversion of speed pwm control signal, right so as to realize
The control of the speed of motor 40, and light current region can will can be opened with forceful electric power zone isolation by the first opto-coupler chip U1, realize
The separate design of strong and weak electricity, improves the reliability of circuit.
According to one embodiment of present invention, as shown in Fig. 2 there is motor inverter 20 signal output part FG to export speed
Degree feedback signal, communication module 10 includes velocity feedback unit 12, and velocity feedback unit 12 includes：Second receiving circuit 120,
Two opto-coupler chip U2 and the second output circuit 122.
Wherein, the second receiving circuit 120 is connected with the signal output part FG of motor inverter 30, the second receiving circuit 120
For receiving feedback speed signal；Second opto-coupler chip U2 has illuminating part and light accepting part, the illuminating part of the second opto-coupler chip U2
It is connected with the second receiving circuit 120；Second output circuit 122 respectively with the light accepting part and control chip 20 of the second opto-coupler chip U2
Velocity feedback end A2 be connected, the second output circuit 122 is used to receive feedback speed signal by the second opto-coupler chip U2, and right
Feedback speed signal is changed to export the feedback speed signal after conversion to the velocity feedback end A2 of control chip 20.
Specifically, as shown in Fig. 2 the second receiving circuit 120 includes：7th resistance R7, the 8th resistance R8, the second electric capacity
C2.Wherein, one end of the 7th resistance R7 is connected with the signal output part FG of motor inverter 30；One end of 8th resistance R8 and the
The other end of seven resistance R7 is connected, and the other end of the 8th resistance R8 is connected with the power end VDD2 of the second default power supply, and the 8th is electric
Resistance R8 is also connected in parallel with the illuminating part of the second opto-coupler chip U2；Second electric capacity C2 and the 8th resistance R8 is connected in parallel.
Specifically, as shown in Fig. 2 the second output circuit 122 includes：9th resistance R9, the tenth resistance R10 and the 3rd electric capacity
C3。
Wherein, one end of the 9th resistance R9 is connected with one end of the light accepting part of the second opto-coupler chip U2, the 9th resistance R9's
The other end is connected with the power end VDD1 of the first default power supply, and the other end of the light accepting part of the second opto-coupler chip U2 and first is preset
The earth terminal GND1 of power supply is connected；One end of tenth resistance R10 is connected with the other end of the 9th resistance R9, the tenth resistance R10's
The other end is connected with the velocity feedback end A2 of control chip 20；One end of 3rd electric capacity C3 and the velocity feedback end of control chip 20
A2 is connected, and the other end of the 3rd electric capacity C3 is connected with the earth terminal GND1 of the first default power supply.
Specifically, motor inverter 30 can be by signal output part FG output speed feedback signals, velocity feedback unit
12 can change to feedback speed signal, and the feedback speed signal after conversion be sent to the velocity feedback of control chip 20
The rotating speed of motor 40 is converted to frequency signal by end A2, i.e. motor inverter 30, and frequency signal is passed into control chip 20
Such as single-chip microcomputer, so as to realize the feedback of the speed to motor 40.More specifically, when signal output part FG exports low level, the
The illuminating part transmitting light of two opto-coupler chip U2, the light accepting part conducting of the second opto-coupler chip U2, the velocity feedback of control chip 20
End A2 is low level；During signal output part FG output high level, the illuminating part stopping transmitting light of the second opto-coupler chip U2, second
The light accepting part shut-off of opto-coupler chip U2, the velocity feedback end A2 of control chip 20 is high level.Thus, velocity feedback unit 12 will
The velocity feedback end A2 of control chip 20 is transferred to after feedback speed signal conversion, so as to realize the anti-of the speed to motor 40
Feedback, and light current region can will can be opened with forceful electric power zone isolation by the second opto-coupler chip U2, the separation for realizing strong and weak electricity sets
Meter, improves the reliability of circuit.
According to one embodiment of present invention, as shown in Fig. 2 there is control chip 20 rotating control end A3 to export just
Reverse control signal, communication module 10 includes rotating control unit 13, and rotating control unit 13 includes：3rd receiving circuit
130th, the 3rd opto-coupler chip U3 and the 3rd output circuit 133.
Wherein, the 3rd receiving circuit 130 is connected with rotating control end A3 of control chip 20, the 3rd receiving circuit 130
For receiving rotating control signal；3rd opto-coupler chip U3 has illuminating part and light accepting part, and the 3rd opto-coupler chip U3's is luminous
Portion is connected with the 3rd receiving circuit 130；3rd output circuit 133 respectively with the light accepting part and motor frequency conversion of the 3rd opto-coupler chip U3
The secondary signal input FR of device 30 is connected, and the 3rd output circuit 133 is used to receive rotating control by the 3rd opto-coupler chip U3
Signal processed, and align reverse control signal and changed the rotating control signal after conversion to be exported to motor inverter 30
Secondary signal input FR.
Specifically, as shown in Fig. 2 the 3rd receiving circuit 130 includes：Second triode Q2, the 11st resistance R11 and the tenth
Two resistance R12.Wherein, the base stage of the second triode Q2 is connected with rotating control end A2 of control chip 20, the second triode
The emitter stage of Q2 is connected with the earth terminal GND1 of the first default power supply；One end of 11st resistance R11 is with the second triode Q2's
Colelctor electrode is connected, and the other end of the 11st resistance R11 is connected with one end of the illuminating part of the 3rd opto-coupler chip U3, the 3rd optocoupler core
The other end of the illuminating part of piece U3 is connected with the power end VDD1 of the first default power supply；12nd resistance R12 and the 3rd optocoupler core
The illuminating part of piece U3 is connected in parallel.
Specifically, as shown in Fig. 2 the 3rd output circuit 133 includes：13rd resistance R13, the 14th resistance R14 and
15 resistance R15.Wherein, one end of the 13rd resistance R13 is connected with one end of the light accepting part of the 3rd opto-coupler chip U3, the 3rd light
The other end of the light accepting part of coupling chip U3 is connected with the earth terminal GND2 of the second default power supply；One end of 14th resistance R14 with
The other end of the 13rd resistance R13 is connected and with the 3rd node, the other end of the 14th resistance R14 and the second default power supply
Power end VDD2 is connected；One end of 15th resistance R15 is input into respectively with the secondary signal of the 3rd node and motor inverter 30
End FR is connected, and the other end of the 15th resistance R15 is connected with the earth terminal GND2 of the second default power supply.
Specifically, control chip 20 can export rotating control signal, rotating control by rotating control end A3
Unit 13 can align reverse control signal and be changed, and the rotating control signal after conversion is sent to motor inverter 30
Secondary signal input FR, so as to realize the control to the rotating of motor 40.More specifically, when the rotating of control chip 20
During control end A3 output high level, the second triode Q2 conductings, the voltage at the 12nd resistance R12 two ends causes the 3rd opto-coupler chip
The illuminating part transmitting light of U3, the light accepting part conducting of the 3rd opto-coupler chip U3, the secondary signal input FR of motor inverter 30
For low level；When rotating control end A3 of control chip 20 exports low level, the second triode Q2 shut-offs, the 3rd optocoupler core
The illuminating part of piece U3 stops transmitting light, the light accepting part shut-off of the 3rd opto-coupler chip U3, the 14th resistance R14 and the 15th resistance
R15 carries out partial pressure to the voltage of the second default power supply, and the voltage after partial pressure is provided to the secondary signal of motor inverter 30
Input FR, secondary signal input FR are high level.Thus, rotating control unit 13 is by after the conversion of rotating control signal
The secondary signal input FR of motor inverter 30 is transferred to, so as to realize the control of the rotating to motor 40, and by
Three opto-coupler chip U3 can will can open light current region with forceful electric power zone isolation, realize the separate design of strong and weak electricity, improve electricity
The reliability on road.
It should be noted that when motor positive and inverse control is carried out, exporting to the secondary signal of motor inverter 30 and being input into
The high level of end FR is preferably 5V, and in embodiments of the present invention, the mode for employing electric resistance partial pressure is realized, i.e., electric using the 14th
The voltage 15V of the second default power supply is divided into 10V and 5V by resistance R14 and the 15th resistance R15, and is supplied to secondary signal defeated 5V
Enter to hold FR.
As described above, in embodiments of the present invention, control chip 20 is carried out with motor inverter 30 by communication module 10
Communication, speed setting, velocity feedback and motor drive direction is realized on circuit and controls three functions, and to the three of communication module 10
Major part is that speed setting unit 11, velocity feedback unit 12 and motor positive and inverse control unit 13 employ isolation design side
Case, that is, be respectively adopted three i.e. U1, U2 and U3 of opto-coupler chip and isolated, as shown in Fig. 2 part A is high-pressure section, part B
For light current region, three opto-coupler chips are that U1, U2 and U3 keep apart part B and part A, and the separation for realizing strong and weak electricity sets
Meter, realizes that the security isolation between control chip and motor inverter communicates, and improves the reliability of circuit.
To sum up, the electric machine control system of the washing machine for proposing according to embodiments of the present invention, communication module has light-coupled isolation
Unit, motor inverter receives the control signal of control chip output by communication module, and motor is entered according to control signal
Row control, and feedback signal is generated according to the state of motor and feedback signal is sent into control chip by communication module,
So as to, forceful electric power area is separated with light current using optocoupler is left, the separate design of strong and weak electricity is realized, improve circuit reliability.
Finally, the embodiment of the present invention also proposed a kind of washing machine, including the motor control of the washing machine of above-described embodiment
System.
The washing machine for proposing according to embodiments of the present invention, by the electric machine control system of above-mentioned washing machine, can utilize
Forceful electric power area is separated and is left by optocoupler with light current, realizes the separate design of strong and weak electricity, improves circuit reliability.
In describing the invention, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicates or imply that the device or element of indication must
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or it is integral；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clearly restriction.For one of ordinary skill in the art
For, can as the case may be understand above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (11)
1. a kind of electric machine control system of washing machine, it is characterised in that include：
Communication module, the communication module has light-coupled isolation unit；
Control chip, the control chip is connected with the communication module, and the control chip is exported by the communication module
Control signal；
Motor inverter, the motor inverter is connected respectively with the motor and the communication module, the motor inverter
The control signal of the control chip output is received by the communication module, and the motor is entered according to the control signal
Row control, and feedback signal is generated according to the state of the motor and the feedback signal is sent by the communication module
To the control chip.
2. the electric machine control system of washing machine according to claim 1, it is characterised in that the control chip has speed
Setting end includes speed setting unit with output speed setting signal, the communication module, and the speed setting unit includes：
First receiving circuit, first receiving circuit is connected with the speed setting end of the control chip, and described first receives
Circuit is used to receive the rate setting signal；
First opto-coupler chip, first opto-coupler chip has illuminating part and light accepting part, the illuminating part of first opto-coupler chip
It is connected with first receiving circuit；
First output circuit, first output circuit respectively with the light accepting part and the motor frequency conversion of first opto-coupler chip
First signal input part of device is connected, and first output circuit is used to be set by first opto-coupler chip reception speed
Determine signal, and the rate setting signal is changed the rate setting signal after conversion to be exported to the motor frequency conversion
First signal input part of device.
3. the electric machine control system of washing machine according to claim 2, it is characterised in that the first receiving circuit bag
Include：
First triode, the base stage of first triode is connected with the speed setting end of the control chip, and the described 1st
The emitter stage of pole pipe is connected with the earth terminal of the first default power supply；
First resistor, one end of the first resistor is connected with the colelctor electrode of first triode, the first resistor it is another
One end is connected with one end of the illuminating part of first opto-coupler chip, the other end of the illuminating part of first opto-coupler chip and institute
The power end for stating the first default power supply is connected；
Second resistance, the second resistance is connected in parallel with the illuminating part of first opto-coupler chip.
4. the electric machine control system of washing machine according to claim 2, it is characterised in that the first output circuit bag
Include：
3rd resistor, one end of the 3rd resistor is connected with one end of the light accepting part of first opto-coupler chip, and described first
The other end of the light accepting part of opto-coupler chip is connected with the power end of the second default power supply；
4th resistance, one end of the 4th resistance is connected and with first node with the other end of the 3rd resistor, described
The other end of the 4th resistance is connected with the earth terminal of the described second default power supply；
5th resistance, one end of the 5th resistance is connected with the first node；
6th resistance, one end of the 6th resistance is connected and with Section Point with the other end of the 5th resistance, described
The other end of the 6th resistance is connected with the earth terminal of the described second default power supply, the Section Point and the motor inverter
First signal input part is connected；
First electric capacity, the first electric capacity is connected with the 6th resistor coupled in parallel；
First electrochemical capacitor, first electrochemical capacitor is connected in parallel with first electric capacity.
5. the electric machine control system of washing machine according to claim 1, it is characterised in that the motor inverter has letter
Number output end includes velocity feedback unit with output speed feedback signal, the communication module, and the velocity feedback unit includes：
Second receiving circuit, second receiving circuit is connected with the signal output part of the motor inverter, and described second connects
Receiving circuit is used to receive the feedback speed signal；
Second opto-coupler chip, second opto-coupler chip has illuminating part and light accepting part, the illuminating part of second opto-coupler chip
It is connected with second receiving circuit；
Second output circuit, second output circuit respectively with the light accepting part and the control chip of second opto-coupler chip
Velocity feedback end be connected, second output circuit is used to receive velocity feedback letter by second opto-coupler chip
Number, and the feedback speed signal is changed to export the feedback speed signal after conversion to the speed of the control chip
Degree feedback end.
6. the electric machine control system of washing machine according to claim 5, it is characterised in that the second receiving circuit bag
Include：
7th resistance, one end of the 7th resistance is connected with the signal output part of the motor inverter；
8th resistance, one end of the 8th resistance is connected with the other end of the 7th resistance, the 8th resistance it is another
The power end with the second default power supply is held to be connected, the 8th resistance is also in parallel with the illuminating part of second opto-coupler chip to be connected
Connect；
Second electric capacity, second electric capacity is connected with the 8th resistor coupled in parallel.
7. the electric machine control system of washing machine according to claim 5, it is characterised in that the second output circuit bag
Include：
9th resistance, one end of the 9th resistance is connected with one end of the light accepting part of second opto-coupler chip, and the described 9th
The other end of resistance is connected with the power end of the first default power supply, the other end of the light accepting part of second opto-coupler chip with it is described
The earth terminal of the first default power supply is connected；
Tenth resistance, one end of the tenth resistance is connected with the other end of the 9th resistance, the tenth resistance it is another
End is connected with the velocity feedback end of the control chip；
3rd electric capacity, described one end of 3rd electric capacity is connected with the velocity feedback end of the control chip, the 3rd electric capacity
The other end is connected with the earth terminal of the described first default power supply.
8. the electric machine control system of washing machine according to claim 1, it is characterised in that the control chip has positive and negative
Turn control end to export rotating control signal, the communication module includes rotating control unit, and the rotating control is single
Unit includes：
3rd receiving circuit, the 3rd receiving circuit is connected with the rotating control end of the control chip, and the described 3rd connects
Receiving circuit is used to receive the rotating control signal；
3rd opto-coupler chip, the 3rd opto-coupler chip has illuminating part and light accepting part, the illuminating part of the 3rd opto-coupler chip
It is connected with the 3rd receiving circuit；
3rd output circuit, the 3rd output circuit respectively with the light accepting part and the motor frequency conversion of the 3rd opto-coupler chip
The secondary signal input of device is connected, and the 3rd output circuit is used to receive the rotating by the 3rd opto-coupler chip
Control signal, and the rotating control signal is changed the rotating control signal after conversion to be exported to the electricity
The secondary signal input of machine frequency converter.
9. the electric machine control system of washing machine according to claim 8, it is characterised in that the 3rd receiving circuit bag
Include：
Second triode, the base stage of second triode is connected with the rotating control end of the control chip, and described second
The emitter stage of triode is connected with the earth terminal of the first default power supply；
11st resistance, one end of the 11st resistance is connected with the colelctor electrode of second triode, and the described 11st is electric
The other end of resistance is connected with one end of the illuminating part of the 3rd opto-coupler chip, the illuminating part of the 3rd opto-coupler chip it is another
The power end with the described first default power supply is held to be connected；
12nd resistance, the 12nd resistance is connected in parallel with the illuminating part of the 3rd opto-coupler chip.
10. the electric machine control system of washing machine according to claim 8, it is characterised in that the 3rd output circuit bag
Include：
13rd resistance, one end of the 13rd resistance is connected with one end of the light accepting part of the 3rd opto-coupler chip, described
The other end of the light accepting part of the 3rd opto-coupler chip is connected with the earth terminal of the second default power supply；
14th resistance, one end of the 14th resistance is connected and with Section three with the other end of the 13rd resistance
Point, the other end of the 14th resistance is connected with the power end of the described second default power supply；
Believe with the second of the 3rd node and the motor inverter respectively 15th resistance, one end of the 15th resistance
Number input is connected, and the other end of the 15th resistance is connected with the earth terminal of the described second default power supply.
11. a kind of washing machines, it is characterised in that include the motor control of the washing machine according to any one of claim 1-10
System processed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611123626.7A CN106655970B (en) | 2016-12-08 | 2016-12-08 | The electric machine control system of washing machine and washing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611123626.7A CN106655970B (en) | 2016-12-08 | 2016-12-08 | The electric machine control system of washing machine and washing machine |
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| CN106655970A true CN106655970A (en) | 2017-05-10 |
| CN106655970B CN106655970B (en) | 2019-05-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114301335A (en) * | 2021-12-30 | 2022-04-08 | 苏州汇川控制技术有限公司 | Motor rotating speed safety control device, system and method |
| CN115029894A (en) * | 2022-06-24 | 2022-09-09 | 创维电器股份有限公司 | Washing machine monitoring system for realizing uart serial control by using Lua language |
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| CN1877982A (en) * | 2005-06-10 | 2006-12-13 | 海尔集团公司 | Velocity feedback circuit for variable frequency control device of alternating current motor and method therefor |
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| CN115029894A (en) * | 2022-06-24 | 2022-09-09 | 创维电器股份有限公司 | Washing machine monitoring system for realizing uart serial control by using Lua language |
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|---|---|
| CN106655970B (en) | 2019-05-21 |
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Effective date of registration: 20190722 Address after: 214028 No. 18 Changjiang South Road, Wuxi National High-tech Development Zone, Jiangsu Province Patentee after: Wuxi Swan Electrical Appliances Co., Ltd. Address before: 214028 Wuxi Changjiang Road, New District, Jiangsu, No. 18 Patentee before: Wuxi Xiaotianer Co., Ltd. |