CN108649690B - Intelligent switch adapter - Google Patents

Intelligent switch adapter Download PDF

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Publication number
CN108649690B
CN108649690B CN201810331219.8A CN201810331219A CN108649690B CN 108649690 B CN108649690 B CN 108649690B CN 201810331219 A CN201810331219 A CN 201810331219A CN 108649690 B CN108649690 B CN 108649690B
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winding
mechanical
phase
voltage
adapter
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CN108649690A (en
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汪肖
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SHANGHAI HUIJUE NETWORK COMMUNICATION EQUIPMENT Co.,Ltd.
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Shanghai Huijue Network Communication Equipment Co ltd
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    • H02J13/0075—
    • 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
    • H02P27/06—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 using dc to ac converters or inverters
    • H02P27/08—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 using dc to ac converters or inverters with pulse width modulation

Abstract

The utility model provides an intelligence switch adapter, includes drive assembly, wireless communication unit, the control unit, connecting portion and machinery and presses splenium/mechanical rotating part, and wireless communication unit is used for carrying out communication connection with mobile communication terminal, acquires the control command that the user sent on mobile communication terminal, and connecting portion are used for with intelligence switch adapter demountable installation extremely on the mechanical switch, machinery presses splenium/mechanical rotating part, connects and is controlled by drive assembly, machinery press splenium/mechanical rotating part with mechanical trigger key looks adaptation, with intelligence switch adapter is connected to when mechanical switch is last, can be in under drive assembly's the drive mechanical trigger key carries out the adjustment of on-off state. Through the intelligent switch adapter, the mobile communication terminal can remotely control the traditional mechanical switch.

Description

Intelligent switch adapter
Technical Field
The invention relates to the field of smart homes, in particular to an intelligent switch adapter.
Background
With the progress of science and technology, the requirements of people on the quality of life are higher and higher. In recent years, smart homes have become more and more hot, have gradually spread from public to ordinary homes, and are more and more favored by people. Compared with the traditional home, the intelligent home applies the electronic communication technology to the home field, so that the home is more convenient and simpler to control and use, the functional design is more comprehensive and intelligent, and in the process of home intelligence, a long time is still needed for the new and old home to be alternated. Traditional switch generally needs artificially to operate switch itself, is not conform to intelligent user demand, but to the traditional switch after having installed, changes the new intelligent switch of outfit, needs not only to replacing current traditional switch for intelligent switch, need reform transform current circuit moreover, and the cost is too big. In addition, for some people, such as tenants, they cannot modify the existing circuits of the landlord at will, which also causes the problem that the intelligent switch is not used.
Disclosure of Invention
In view of the above technical problems, the present invention provides an intelligent switch adapter to solve the technical defects that the conventional switch cannot be replaced at will and the cost is too high due to the replacement.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing an intelligent switch adapter for switching a mechanical switch having a mechanical trigger key requiring human touch for control of the switch, the intelligent switch adapter comprising:
a drive assembly;
the wireless communication unit is used for carrying out communication connection with the mobile communication terminal and acquiring a control instruction sent by a user on the mobile communication terminal;
the control unit is used for controlling the working state of the driving component according to the control instruction;
a connection part for detachably mounting the intelligent switch adapter to the mechanical switch;
the mechanical pressing part/mechanical rotating part is connected with and controlled by the driving assembly, and is matched with the mechanical trigger key so as to drive the mechanical trigger key to adjust the on-off state under the driving of the driving assembly when the intelligent switch adapter is connected to the mechanical switch;
the mechanical switch is also provided with a socket, the intelligent switch adapter is also provided with a plug, and when the intelligent switch adapter is installed on the mechanical switch, the plug is just inserted into the socket;
the intelligent switch adapter is provided with a shell, the driving assembly, the wireless communication unit and the control unit are all positioned in the shell, the connecting part is positioned on the back and/or the side of the shell, a groove is formed in the side, and the size of the groove is matched with that of the mechanical trigger key;
the connecting part is a sticky pasting part or a clamping part used for being clamped on the mechanical switch;
the wireless communication unit is a wifi module or a Bluetooth module;
the shell is internally provided with a power supply conversion circuit, an input terminal of the power supply conversion circuit is electrically connected with the plug, and alternating current commercial power of the plug is converted into direct current to supply power to the intelligent switch adapter; two groups of reversely connected diodes are arranged between two input ends of the power conversion circuit, each group is internally provided with two diodes which are connected in two directions, an output end is led out between the two diodes of each group, one input end of the power conversion circuit is connected in series with a high-pass filter circuit, the high-pass filter circuit is formed by connecting a resistor and a capacitor in parallel, the size of the resistor is 280-300K ohm, and the size of the capacitor is 25-30 muF; a diode is connected in parallel between the two output ends of the power supply conversion circuit;
the front surface of the shell is provided with an indicator light, a control signal of the indicator light is derived from an electrical signal between a control unit and the mechanical pressing part/the mechanical rotating part, an indication processing module is connected between the electrical signal and the indicator light, and the indication processing module is used for controlling a controlled switch of the indicator light to be switched on when the electrical signal is at a high level, or controlling the controlled switch of the indicator light to be switched off;
the driving assembly comprises a two-phase permanent magnet synchronous motor, the two-phase permanent magnet synchronous motor adopts an SVPWM (space vector pulse width modulation) method, and the SVPWM method comprises the following steps:
s1, calculating d-axis voltage V under a rotating coordinate systemdAnd q-axis voltage VqIn which V isdIs an excitation component, VqIs a torque component;
s2, converting the d-axis voltage VdQ-axis voltage VqObtaining the voltage V under the two-phase static coordinate system by performing PARK inverse transformationα、VβIn which V isαIs an α axis component, Vββ axis component;
s3, calculating phase voltages of an AB winding and a CD winding of the two-phase permanent magnet synchronous motor according to the phase relation between the two-phase winding and the α and β shafts under the two-phase static coordinate system;
s4, calculating the time for opening the tube of the bridge arm corresponding to the AB winding and the CD winding according to the phase voltage, the current bus voltage and the switching period;
and S5, judging a sector according to the opening time of the bridge arm to obtain PWM comparison values of the bridge arms corresponding to the AB winding and the CD winding, comparing each PWM comparison value with a triangular wave to obtain PWM control signals respectively, and driving the inverter according to each PWM control signal to control the working state of the two-phase permanent magnet synchronous motor.
Further, in the intelligent switching adapter of the present invention, the phase voltage in S3 is calculated as:
Figure BDA0001628011250000031
wherein, VABFor the AB phase voltage, V, of the two-phase permanent magnet synchronous motor windingCDThe voltage vector is the CD phase voltage of a two-phase permanent magnet synchronous motor winding, theta is the coincidence of an AB phase winding and an α shaft, and the voltage vector is the coincidence of the CD phase winding and a β shaft
Figure BDA0001628011250000041
Angle to axis α, voltage vector
Figure BDA0001628011250000042
Is the vector sum of the α axis voltage and the β axis voltage.
Further, in the intelligent switch adapter of the present invention, the open time of the bridge arm corresponding to the AB winding and the CD winding in step S4 is specifically obtained according to the following formula:
Figure BDA0001628011250000043
wherein, tAB、tCDAre respectively AThe winding B and the winding CD correspond to the time of opening the bridge arm, Vdc is the bus capacitor voltage of the two-phase permanent magnet synchronous motor, and T issIs the switching period of the switching tube.
Further, in the intelligent switch adapter of the present invention, in the step S5, the two H full bridges of the bridge arm corresponding to the AB winding and the CD winding, the determining the sector to obtain the PWM comparison values of the bridge arm corresponding to the AB winding and the CD winding specifically includes:
when t isAB≥0：CMPTA＝tAB；CMPTB＝0；
When t isAB<0：CMPTA＝0；CMPTB＝-tAB；
When t isCD≥0：CMPTC＝tCD；CMPTD＝0；
When t isCD<0：CMPTC＝0；CMPTD＝-tCD；
The CMPTA, CMPTB, CMPTC and CMPTD are PWM comparison values of four bridge arms of a double-H full bridge.
Further, in the intelligent switching adapter of the present invention, the PWM comparison values are compared with the triangular wave to obtain the PWM control signals, respectively, specifically: and at any given moment, if the amplitude of the triangular wave is greater than the PWM comparison value, outputting a high level, otherwise, outputting a low level, and forming the PWM control signal by the high level and the low level.
Further, in the intelligent switch adapter of the present invention, the mobile communication terminal is a mobile phone.
After the intelligent switch adapter is connected to a traditional mechanical switch, a control instruction is sent through a mobile communication terminal, and after the intelligent switch adapter receives the control instruction, a control unit controls a driving assembly to drive a mechanical pressing part/a mechanical rotating part according to the control instruction, and the mechanical pressing part/the mechanical rotating part applies force to a mechanical trigger key on the traditional switch, so that the switch state on the traditional switch is changed. When the intelligent switch adapter is not needed, the intelligent switch adapter is detached, so that the technical defects that the traditional switch cannot be replaced at will and the cost is overlarge due to replacement can be overcome. The SVPWM modulation system and the SVPWM modulation method can well meet the drive control requirement of the two-phase permanent magnet synchronous motor because the amplitude of each vector of four space vectors is the bus voltage, and therefore the voltage utilization rate of a direct current bus can reach 100%.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a functional block diagram of one embodiment of the intelligent switching adapter of the present invention;
FIG. 2 is a schematic front view of the mechanical switch of the present invention;
FIG. 3 is a schematic diagram of the power conversion circuit of the present invention
FIG. 4 is a topology diagram of a two-phase inverter and a two-phase PMSM of the present invention;
FIG. 5 is a vector diagram of a three-phase inverter;
FIG. 6 is a vector diagram of the two-phase inverter of the present invention;
fig. 7 is a schematic diagram of the formation of PWM control signals corresponding to the AB winding.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a schematic block diagram of an embodiment of the intelligent switching adapter of the present invention is shown. In this embodiment, the intelligent switch adaptor is used for adapting a mechanical switch fixedly installed on a wall in fig. 2, the mechanical switch has a mechanical trigger key requiring manual touch control to control the switch 21, and the intelligent switch adaptor includes:
a drive assembly 13;
a wireless communication unit 12, configured to perform communication connection with a mobile communication terminal, and acquire a control instruction sent by a user on the mobile communication terminal, where the control instruction may be on, off, increase, decrease, and the like, and may be different according to different switches;
the control unit 11 is used for controlling the working state of the driving component 13 according to the control instruction;
a connection part 15 for detachably mounting the intelligent switch adapter to the mechanical switch;
the mechanical pressing part/mechanical rotating part 14 is connected with and controlled by the driving component 13, and the mechanical pressing part/mechanical rotating part 14 is matched with the mechanical trigger key 21, so that when the intelligent switch adapter is connected to the mechanical switch, the mechanical trigger key 21 can be driven by the driving component 13 to adjust the switch state;
the mechanical switch is also provided with a socket 22, the intelligent switch adapter is also provided with a plug (black and thick line part on the left side in fig. 2), and when the intelligent switch adapter is installed on the mechanical switch, the plug is just inserted into the socket;
the intelligent switch adapter is provided with a shell, the driving component 13, the wireless communication unit 12 and the control unit 11 are all positioned in the shell, the connecting part 15 is positioned on the back and/or the side of the shell, a groove is formed in the side, and the size of the groove is matched with that of the mechanical trigger key;
the connecting part 15 is a sticky pasting part or a clamping part for clamping on the mechanical switch;
the wireless communication unit 12 is a wifi module or a bluetooth module.
A power conversion circuit 16 is further arranged in the housing, an input terminal of the power conversion circuit 16 is electrically connected with the plug, and alternating current commercial power of the plug is converted into direct current to power the intelligent switch adapter, which can be referred to fig. 3 specifically; two groups of reversely connected diodes are arranged between two input ends of the power conversion circuit 16, each group is internally provided with two diodes which are connected in the two directions, an output end is led out between the two diodes of each group, one input end of the power conversion circuit 16 is connected in series with a high-pass filter circuit, the high-pass filter circuit is formed by connecting a resistor R1 and a capacitor C1 in parallel, the size of the resistor R1 is 280K ohm-300K ohm, and the size of the capacitor C1 is 25 muF-30 muF; a diode DZ1 is connected in parallel between the two output terminals of the power conversion circuit 16 to filter the alternating current between the output terminals.
The front of the housing has an indicator light 18, a control signal of the indicator light 18 is derived from an electrical signal between the control unit 11 and the mechanical pressing portion/mechanical rotating portion 14, an indication processing module 17 is connected between the electrical signal and the indicator light 18, and the indication processing module 17 is configured to control a controlled switch of the indicator light 18 to be turned on when the electrical signal is at a high level, and otherwise, control the controlled switch of the indicator light 18 to be turned off.
The driving assembly 13 includes a two-phase permanent magnet synchronous motor, the two-phase permanent magnet synchronous motor controls the mechanical pressing part/mechanical rotating part 14 through a transmission part, the two-phase permanent magnet synchronous motor further has a driving control circuit, the driving control circuit controls the two-phase permanent magnet synchronous motor by using an SVPWM modulation method, the SVPWM modulation method includes the following steps:
the SVPWM modulation method is applied to a two-phase permanent magnet synchronous motor shown in figure 4, and a driving circuit of the SVPWM modulation method is a double-H full-bridge circuit. The driving circuit specifically includes four MOSFET groups (P-type is selected in this embodiment, but the invention is not limited thereto), the four MOSFET groups are connected in parallel, each MOSFET group has the same composition, and includes two MOSFETs connected in parallel, the source of one MOSFET is connected to the drain of another MOSFET, and a diode is connected between the source and the drain of each MOSFET, wherein the anode is connected to the source, and the cathode is connected to the drain. The drive circuit is provided with two windings AB and CD, wherein the AB and CD are respectively provided with two output ends, and the total number of the input ends is 4, and the input ends are respectively and electrically connected to the connection positions of two MOSFETs in each MOSFET group. And the gate pole of each MOSFET is connected with a PWM control signal so as to control the working state of the two-phase permanent magnet synchronous motor.
The SVPWM modulation method of the embodiment comprises the following steps:
s1, calculating d-axis voltage V under a rotating coordinate systemdAnd q-axis voltage Vq. Wherein VdIs an excitation component, VqIs the torque component. VdIs the output of a d-axis current regulator, VqFor q-axis current regulatorsI.e. the output of the current loop in servo control is used as the input of the SVPWM modulation method according to the embodiment of the present invention.
S2, mixing Vd、VqObtaining the voltage V under the two-phase static coordinate system by performing PARK inverse transformationα、Vβ. Wherein VαIs an α axis component, Vββ axis component, PARK inverse transform is a standard transform in vector control and is not described in detail here.
And S3, calculating phase voltages of an AB winding and a CD winding of the two-phase permanent magnet synchronous motor according to the phase relation between the two-phase winding and the α and β shafts under the two-phase static coordinate system.
Figure BDA0001628011250000081
Wherein VABFor the AB phase voltage, V, of the two-phase permanent magnet synchronous motor windingCDFor the two-phase permanent magnet synchronous motor winding CD phase voltage, referring to the graphs shown in FIGS. 5 and 6, theta is the voltage vector
Figure BDA0001628011250000082
Angle of α, and AB phase winding coincident with α and CD phase winding coincident with β, voltage vector
Figure BDA0001628011250000083
Is the vector sum of α axis voltage and β axis voltage Vα、VβThe amplitude of the voltage can reach Vdc (the voltage of the bus capacitor), so that the utilization rate of the direct current bus voltage can reach 100%.
And S4, calculating the open-tube time of the bridge arm corresponding to the AB winding and the CD winding according to the phase voltage, the current bus voltage and the switching period.
Figure BDA0001628011250000084
Wherein, tAB、tCDRespectively the opening time of the bridge arm corresponding to the AB winding and the CD winding, TsIs the switching period of the switching tube.
And S5, judging the sector to obtain PWM comparison values of bridge arms corresponding to the AB winding and the CD winding, comparing each PWM comparison value with a triangular wave to obtain PWM control signals respectively, and driving the inverter according to each PWM control signal to control the working state of the two-phase permanent magnet synchronous motor. The method for acquiring the PWM comparison value can be obtained by adopting the following scheme:
when t isAB≥0：CMPTA＝tAB；CMPTB＝0；
When t isAB<0：CMPTA＝0；CMPTB＝-tAB；
When t isCD≥0：CMPTC＝tCD；CMPTD＝0；
When t isCD<0：CMPTC＝0；CMPTD＝-tCD；
The CMPTA, CMPTB, CMPTC and CMPTD are PWM comparison values of four bridge arms of a double-H full bridge, and the comparison values are compared with triangular waves in real time to generate PWM control signals. The PWM comparison values are respectively compared with the triangular waves to respectively obtain PWM control signals, and the PWM control signals are specifically as follows: and at any given moment, if the amplitude of the triangular wave is greater than the PWM comparison value, outputting a high level, otherwise, outputting a low level, wherein the high level and the low level form PWM control signals which are respectively output to the control end-gate pole of the corresponding MOSFET. The principle of forming the PWM control signal can be seen in fig. 7, where PWMA and PWMB are the PWM control signals of the MOSFETs corresponding to the a terminal and the B terminal, respectively, and the C terminal and the D terminal are the same as this principle, and are not described herein again.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. An intelligent switch adapter for adapting a mechanical switch having a mechanical trigger key requiring manual touch for switching control, the intelligent switch adapter comprising:
a drive assembly;
the wireless communication unit is used for carrying out communication connection with the mobile communication terminal and acquiring a control instruction sent by a user on the mobile communication terminal;
the control unit is used for controlling the working state of the driving component according to the control instruction;
a connection part for detachably mounting the intelligent switch adapter to the mechanical switch;
the mechanical pressing part/mechanical rotating part is connected with and controlled by the driving assembly, and is matched with the mechanical trigger key so as to drive the mechanical trigger key to adjust the on-off state under the driving of the driving assembly when the intelligent switch adapter is connected to the mechanical switch;
the mechanical switch is also provided with a socket, the intelligent switch adapter is also provided with a plug, and when the intelligent switch adapter is installed on the mechanical switch, the plug is just inserted into the socket;
the intelligent switch adapter is provided with a shell, the driving assembly, the wireless communication unit and the control unit are all positioned in the shell, the connecting part is positioned on the back and/or the side of the shell, a groove is formed in the side, and the size of the groove is matched with that of the mechanical trigger key;
the connecting part is a sticky pasting part or a clamping part used for being clamped on the mechanical switch;
the wireless communication unit is a wifi module or a Bluetooth module;
the shell is internally provided with a power supply conversion circuit, an input terminal of the power supply conversion circuit is electrically connected with the plug, and alternating current commercial power of the plug is converted into direct current to supply power to the intelligent switch adapter; two groups of reversely connected diodes are arranged between two input ends of the power conversion circuit, each group is internally provided with two diodes which are connected in two directions, an output end is led out between the two diodes of each group, one input end of the power conversion circuit is connected in series with a high-pass filter circuit, the high-pass filter circuit is formed by connecting a resistor and a capacitor in parallel, the size of the resistor is 280-300K ohm, and the size of the capacitor is 25-30 muF; a diode is connected in parallel between the two output ends of the power supply conversion circuit;
the front surface of the shell is provided with an indicator light, a control signal of the indicator light is derived from an electrical signal between a control unit and the mechanical pressing part/the mechanical rotating part, an indication processing module is connected between the electrical signal and the indicator light, and the indication processing module is used for controlling a controlled switch of the indicator light to be switched on when the electrical signal is at a high level, or controlling the controlled switch of the indicator light to be switched off;
the driving assembly comprises a two-phase permanent magnet synchronous motor, the two-phase permanent magnet synchronous motor adopts an SVPWM (space vector pulse width modulation) method, and the SVPWM method comprises the following steps:
s1, calculating d-axis voltage V under a rotating coordinate systemdAnd q-axis voltage VqIn which V isdIs an excitation component, VqIs a torque component;
s2, converting the d-axis voltage VdQ-axis voltage VqObtaining the voltage V under the two-phase static coordinate system by performing PARK inverse transformationα、VβIn which V isαIs an α axis component, Vββ axis component;
s3, calculating phase voltages of an AB winding and a CD winding of the two-phase permanent magnet synchronous motor according to the phase relation between the two-phase winding and the α and β shafts under the two-phase static coordinate system;
s4, calculating the time for opening the tube of the bridge arm corresponding to the AB winding and the CD winding according to the phase voltage, the current bus voltage and the switching period;
and S5, judging a sector according to the opening time of the bridge arm to obtain PWM comparison values of the bridge arms corresponding to the AB winding and the CD winding, comparing each PWM comparison value with a triangular wave to obtain PWM control signals respectively, and driving an inverter according to each PWM control signal to control the working state of the two-phase permanent magnet synchronous motor.
2. The intelligent switching adapter according to claim 1, wherein the phase voltage in S3 is calculated as:
Figure FDA0002261442290000031
wherein, VABFor the AB phase voltage, V, of the two-phase permanent magnet synchronous motor windingCDThe voltage vector is the CD phase voltage of a two-phase permanent magnet synchronous motor winding, theta is the coincidence of an AB phase winding and an α shaft, and the voltage vector is the coincidence of the CD phase winding and a β shaft
Figure FDA0002261442290000032
Angle to axis α, voltage vector
Figure FDA0002261442290000033
Is the vector sum of the α axis voltage and the β axis voltage.
3. The intelligent switching adapter according to claim 1, wherein the open time of the bridge arm corresponding to the AB winding and the CD winding in step S4 is obtained according to the following formula:
Figure FDA0002261442290000034
wherein, tAB、tCDRespectively the open-tube time of the bridge arm corresponding to the AB winding and the CD winding, Vdc is the bus capacitance voltage of the two-phase permanent magnet synchronous motor, and TsIs the switching period of the switching tube.
4. The intelligent switching adapter of claim 1, wherein in step S5, the two H full bridges of the bridge arms corresponding to the AB winding and the CD winding, and the determining the sectors to obtain the PWM comparison values of the bridge arms corresponding to the AB winding and the CD winding specifically includes:
when t isAB≥0：CMPTA＝tAB；CMPTB＝0；
When t isAB<0：CMPTA＝0；CMPTB＝-tAB；
When t isCD≥0：CMPTC＝tCD；CMPTD＝0；
When t isCD<0：CMPTC＝0；CMPTD＝-tCD；
The CMPTA, CMPTB, CMPTC and CMPTD are PWM comparison values of four bridge arms of a double-H full bridge.
5. The intelligent switching adapter of claim 1, wherein the PWM comparison values are compared with the triangular waves respectively to obtain PWM control signals, specifically: and at any given moment, if the amplitude of the triangular wave is greater than the PWM comparison value, outputting a high level, otherwise, outputting a low level, and forming the PWM control signal by the high level and the low level.
6. The intelligent switching adapter according to claim 1, wherein the mobile communication terminal is a mobile phone.
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Citations (4)

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CN205247131U (en) * 2015-12-07 2016-05-18 李志晨 Remote control switching device
CN105553019A (en) * 2015-12-31 2016-05-04 浙江金源电气科技有限公司 Wi-Fi controlled household electric vehicle charger, and charging method thereof
CN107040437A (en) * 2017-04-27 2017-08-11 荆门品创通信科技有限公司 Control system and method that switch degree is adjusted are carried out by Voice command illuminating lamp

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