CN210578323U - Motor interface conversion circuit and converter - Google Patents
Motor interface conversion circuit and converter Download PDFInfo
- Publication number
- CN210578323U CN210578323U CN201921854294.9U CN201921854294U CN210578323U CN 210578323 U CN210578323 U CN 210578323U CN 201921854294 U CN201921854294 U CN 201921854294U CN 210578323 U CN210578323 U CN 210578323U
- Authority
- CN
- China
- Prior art keywords
- signal
- gear
- motor
- circuit
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model discloses a motor interface conversion circuit and a converter, wherein the motor interface conversion circuit comprises an interface unit, a sampling unit, a signal conversion unit and a signal output unit, and the interface unit comprises a plurality of gear signal ends; the sampling unit is used for acquiring alternating current signals of different gear signal ends; the signal conversion unit is used for converting the alternating current signal into a direct current signal; the signal output unit is used for outputting a direct current signal. A plurality of gear signal terminals of the interface unit are utilized to correspondingly match a plurality of gear taps of the motor, if the motor is in a certain gear, the corresponding gear signal terminals can output alternating current, the signal conversion unit is utilized to convert the alternating current signal into a direct current signal, and then the direct current signal is output through the signal output unit, so that the corresponding working gear is identified, different rotating speed signals are given to drive the motor according to the gear, the motor is practical and reliable, and the single-phase asynchronous alternating current motor suitable for multi-speed gears is replaced by the interface conversion during brushless direct current motor.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to motor interface converting circuit and converter.
Background
The motor type with large stock at present is a single-phase asynchronous alternating current motor, and the motor of the type has the characteristics of low price, high reliability and the like, but has the characteristics of high noise, low efficiency and the like. With the gradual promotion of national energy efficiency level, customer experience is gradually strengthened, and the requirements on noise and efficiency are provided for a fan motor used on household appliances, so that the trend of replacing a single-phase asynchronous alternating current motor by a brushless direct current motor is realized. However, the single-phase asynchronous ac motor and the brushless dc motor have different control, so that the terminal control board needs different schemes to correspond to each other when the two motors are used. Because the single-phase asynchronous alternating current motor usually has multi-gear adjusting rotating speed, a plurality of winding taps are arranged, and the common interface of the brushless direct current motor is a 5-wire system and comprises a winding power supply positive electrode, a power supply negative electrode, a chip power supply positive electrode, a speed adjusting signal and a rotating speed feedback signal, the interface of the brushless direct current motor cannot directly acquire the gear signal of the single-phase asynchronous alternating current motor, and the traditional interface cannot be directly replaced when the brushless direct current motor is used for replacing the single-phase asynchronous alternating current motor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a motor interface converting circuit and converter can discern the work gear of motor to output corresponding gear signal.
According to the utility model discloses a motor interface converting circuit of first aspect embodiment, include:
the interface unit comprises a plurality of gear signal ends;
the sampling unit is used for acquiring alternating current signals of different gear signal ends;
the signal conversion unit is used for converting the alternating current signal into a direct current signal;
and the signal output unit is used for outputting the direct current signal.
According to the utility model discloses motor interface converting circuit has following beneficial effect at least:
utilize a plurality of gear signal terminals of interface unit to correspond the many gears interface of matching the motor, if the motor is in the operating condition of a certain gear rotational speed, corresponding gear signal terminal can output the alternating current, utilize signal conversion unit to convert this alternating current signal into the direct current signal of telecommunication, then export this direct current signal through signal output unit, discern corresponding operating gear like this, thereby give different rotational speed signal driving motor according to the gear, it is practical reliable, the single-phase asynchronous alternating current motor replacement that is applicable to many speed gears is interface conversion when brushless direct current motor.
According to the utility model discloses a some embodiments, the interface unit is including first gear signal end, second gear signal end and third gear signal end, the sampling unit includes first sampling resistance and second sampling resistance, first sampling resistance's both ends are connected respectively first gear signal end with second gear signal end, second sampling resistance's both ends are connected respectively first gear signal end with third gear signal end.
According to some embodiments of the utility model, the signal conversion unit includes first optical coupler, first voltage stabilizing circuit, second optical coupler and second voltage stabilizing circuit, the input of first optical coupler acquires the voltage signal at first sampling resistance both ends, the output of first optical coupler is connected the input of first voltage stabilizing circuit, the input of second optical coupler acquires the voltage signal at second sampling resistance both ends, the output of second optical coupler is connected the input of second voltage stabilizing circuit, the output of first voltage stabilizing circuit with the output of second voltage stabilizing circuit respectively with signal output unit connects.
According to some embodiments of the utility model, first optical coupler with be equipped with the first protection device that is used for current-voltage protection between the first sampling resistance, the second optical coupler with be equipped with the second protection device that is used for current-voltage protection between the second sampling resistance.
According to some embodiments of the utility model, the signal output unit includes first signal output circuit and second signal output circuit, first signal output circuit's input with first voltage stabilizing circuit's output is connected, second signal output circuit's input with second voltage stabilizing circuit's output is connected.
According to a second aspect of the present invention, a converter includes the above-mentioned motor interface converting circuit.
According to the utility model discloses converter has following beneficial effect at least:
this converter utilizes a plurality of gear signal terminals of interface unit to correspond the many gears interface of matching the motor, if the motor is in the operating condition of a certain gear rotational speed, corresponding gear signal terminal can output the alternating current, utilize signal conversion unit to convert this alternating current signal into the direct current signal of telecommunication, then export this direct current signal through signal output unit, discern corresponding work gear like this, thereby give different rotational speed signal driving motor according to the gear, it is practical reliable, be applicable to the interface conversion when the single-phase asynchronous alternating current motor replacement of many fast gears is brushless direct current motor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a working schematic diagram of a motor interface conversion circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a motor interface conversion circuit according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, an embodiment of the present invention provides a motor interface conversion circuit, including an interface unit, a sampling unit, a signal conversion unit, and a signal output unit, where the interface unit includes a plurality of gear signal terminals, the gear signal terminals are used to match a multi-gear interface of a motor, when the motor is switched to a certain gear to work, the corresponding gear signal terminals output an ac electrical signal, and at this time, other gear signal terminals output no signal, the sampling unit obtains the ac electrical signal of the gear signal terminals, and since the gear signal terminals are ac electrical signals and the control signal of a brushless dc motor is a dc electrical signal, the signal conversion unit converts the ac electrical signal into a dc electrical signal, and then the signal output unit outputs the dc electrical signal, and after signal conversion, different gear signal terminals can output through different output ports of the signal output unit, thus realizing the identification of different gears. Different direct current signals can be output according to different gear signal ends so as to distinguish different gears, and correct gears can be identified. According to the direct current signal that signal output unit output, the control unit (like MCU) of motor can make the judgement, gives different rotational speed signal drive motor according to corresponding gear, like this, when the single-phase asynchronous alternating current motor replacement of multispeed gear is brushless direct current motor, this motor interface converting circuit of accessible directly carries out interface conversion, and is easy and simple to handle, practical reliable.
Taking a motor with three speed gears as an example for explanation, the interface unit includes a first gear signal end L, a second gear signal end M and a third gear signal end H, wherein the first gear signal end L corresponds to a low speed gear, the second gear signal end M corresponds to a medium speed gear, and the third gear signal end H corresponds to a high speed gear. In the embodiment, the default starting gear of the motor is a low-rotation-speed gear, namely the motor runs at the low-rotation-speed gear when being started, and then is switched according to the identified correct gear, so that the rotation speed corresponding to the gear is switched. In the embodiment, a first gear signal end L is used as a reference end for sampling, the first gear signal end L outputs an alternating current signal by default, if the motor is in a middle-speed gear, a second gear signal end M outputs an alternating current signal, and neither the first gear signal end L nor a third gear signal end H outputs; if the motor is in a high-speed gear, the third gear signal end H outputs an alternating current signal, and neither the first gear signal end L nor the second gear signal end M outputs the alternating current signal. Therefore, in the embodiment, the alternating current signal collected by the sampling unit is an alternating current voltage signal between a high-speed gear, a medium-speed gear and a low-speed gear. Specifically, the resistor is used as a current sampling resistor of the alternating current loop, and if a certain gear is switched on, current flows through the alternating current loop, so that voltage signals are generated at two ends of the sampling resistor, and the sampling mode is simple and practical.
Referring to the schematic circuit diagram shown in fig. 2, the sampling unit includes a first sampling resistor RS1 and a second sampling resistor RS2, two ends of the first sampling resistor RS1 are respectively connected to the first-gear signal terminal L and the second-gear signal terminal M, and two ends of the second sampling resistor RS2 are respectively connected to the first-gear signal terminal L and the third-gear signal terminal H. If the motor is in a middle rotating speed gear, the second gear signal end M outputs an alternating current signal, and two ends of the first sampling resistor RS1 generate voltage signals. If the motor is in a high-speed gear, the third gear signal end H outputs an alternating-current signal, and two ends of the second sampling resistor RS2 generate voltage signals.
In some embodiments, the signal conversion unit includes a first photo-coupler IC1, a first regulation circuit, a second photo-coupler IC2, and a second regulation circuit. The first optocoupler IC1 and the second optocoupler IC2 act as a photo-electric signal isolation switch, partially separating the ac circuit from the dc circuit. The first voltage stabilizing circuit and the second voltage stabilizing circuit are used as gear reference voltage generating circuits. When a middle rotating speed gear is selected, the second gear signal end M outputs an alternating current signal, voltage signals are generated at two ends of the first sampling resistor RS1 and are subjected to photoelectric conversion through the first optical coupler IC1, and then the first optical coupler IC1 outputs a reference voltage for controlling the first voltage stabilizing circuit to output stable voltage for indicating the gear to be switched on. Similarly, when the high-speed gear is selected, the third gear signal terminal H outputs an alternating current signal, two ends of the second sampling resistor RS2 generate a voltage signal and perform photoelectric conversion through the second optical coupler IC2, and then the second optical coupler IC2 outputs a reference voltage for controlling the second voltage stabilizing circuit to output a stable voltage for indicating that the gear is switched on.
Specifically, the first voltage stabilizing circuit comprises a resistor R3, a resistor R4, a resistor R5 and a capacitor C1, one end of the resistor R3 is connected with the 15V voltage stabilizing power supply, the other end of the resistor R3 is connected with an output pin 3 of the first optical coupler IC1, an output pin 4 of the first optical coupler IC1 is connected with an input end of the first signal output circuit through the resistor R4, one end of the resistor R5 is connected with an output pin 4 of the first optical coupler IC1, the other end of the resistor R5 is connected with a ground terminal, and the capacitor C1 is connected between the input end of the first signal output circuit and the ground terminal. The second voltage stabilizing circuit comprises a resistor R7, a resistor R8, a resistor R9 and a capacitor C2, one end of the resistor R7 is connected with the 15V voltage stabilizing power supply, the other end of the resistor R8 is connected with an output pin 3 of a second optical coupler IC2, an output pin 4 of the second optical coupler IC2 is connected with the input end of the second signal output circuit through the resistor R8, one end of the resistor R9 is connected with the output pin 4 of the second optical coupler IC2, the other end of the resistor R9 is connected with the ground terminal, and the capacitor C2 is connected between the input end of the second signal output circuit and the ground terminal. The capacitor C1 and the capacitor C2 play a role in filtering, and stable reference voltage is guaranteed to be output.
In some embodiments, as shown in fig. 2, a first diode D1 and a resistor R1 are connected in series between the first optocoupler IC1 and the first sampling resistor RS1, a second diode D2 and a resistor R2 are connected in series between the second optocoupler IC2 and the second sampling resistor RS2, and the first diode D1 and the second diode D2 serve as reverse voltage protection devices for the light emitting diodes in the optocoupler to prevent the reverse voltage from damaging the optocoupler; the resistor R1 and the resistor R2 are used as current limiting resistors of the light emitting diode in the optocoupler to prevent the light emitting diode from flowing excessive current.
In some embodiments, the first signal output circuit and the second signal output circuit are used for inverting the gear reference voltage, outputting a signal to the MCU for judgment, and the MCU outputs different rotating speed signals to drive the motor according to different gears, so that the correct gear is automatically identified and the rotating speed corresponding to the corresponding gear is controlled to be switched. Specifically, the first signal output circuit comprises a triode Q1 and a resistor R6, the base of the triode Q1 is connected with the resistor R4, the output of the collector of the triode Q1 is connected with the MCU, the collector is connected with 5V voltage through a resistor R6, and the emitter of the triode Q1 is grounded. The second signal output circuit comprises a triode Q2 and a resistor R10, the base electrode of the triode Q2 is connected with the resistor R8, the output of the collector electrode of the triode Q2 is connected with the MCU, the collector electrode is connected with 5V voltage through a resistor R10, and the emitter electrode of the triode Q2 is grounded.
The motor is defaulted to operate in a low-rotating-speed gear when started, then the gear is identified, if the gear is a high-rotating-speed gear, namely, an alternating current signal is output by a third gear signal end H, voltage signals are generated at two ends of a second sampling resistor RS2 at the moment, the voltage signals are subjected to photoelectric conversion through a second optical coupler IC2 and then output to control a second voltage stabilizing circuit to output reference voltage, the reference voltage enables a triode Q2 to be conducted, so that the output voltage is in a low level, namely, the gear reference voltage is inverted, the MCU identifies the inverted output signals, judges that the current gear is a high-rotating-speed gear, and identifies a correct gear and switches to a rotating speed corresponding to the gear.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (6)
1. A motor interface switching circuit, comprising:
the interface unit comprises a plurality of gear signal ends;
the sampling unit is used for acquiring alternating current signals of different gear signal ends;
the signal conversion unit is used for converting the alternating current signal into a direct current signal;
and the signal output unit is used for outputting the direct current signal.
2. The electrical machine interface conversion circuit according to claim 1, wherein the interface unit includes a first gear signal terminal, a second gear signal terminal, and a third gear signal terminal, the sampling unit includes a first sampling resistor and a second sampling resistor, two ends of the first sampling resistor are respectively connected to the first gear signal terminal and the second gear signal terminal, and two ends of the second sampling resistor are respectively connected to the first gear signal terminal and the third gear signal terminal.
3. The electrical interface conversion circuit of claim 2, wherein the signal conversion unit comprises a first optical coupler, a first voltage stabilizing circuit, a second optical coupler and a second voltage stabilizing circuit, an input terminal of the first optical coupler obtains a voltage signal at two ends of the first sampling resistor, an output terminal of the first optical coupler is connected to an input terminal of the first voltage stabilizing circuit, an input terminal of the second optical coupler obtains a voltage signal at two ends of the second sampling resistor, an output terminal of the second optical coupler is connected to an input terminal of the second voltage stabilizing circuit, and an output terminal of the first voltage stabilizing circuit and an output terminal of the second voltage stabilizing circuit are respectively connected to the signal output unit.
4. The electrical interface conversion circuit of claim 3, wherein a first protection device for current and voltage protection is disposed between the first optical coupler and the first sampling resistor, and a second protection device for current and voltage protection is disposed between the second optical coupler and the second sampling resistor.
5. The electrical interface conversion circuit of claim 3, wherein said signal output unit comprises a first signal output circuit and a second signal output circuit, an input terminal of said first signal output circuit is connected to an output terminal of said first voltage regulator circuit, and an input terminal of said second signal output circuit is connected to an output terminal of said second voltage regulator circuit.
6. A transducer comprising a motor interface switching circuit according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921854294.9U CN210578323U (en) | 2019-10-30 | 2019-10-30 | Motor interface conversion circuit and converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921854294.9U CN210578323U (en) | 2019-10-30 | 2019-10-30 | Motor interface conversion circuit and converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210578323U true CN210578323U (en) | 2020-05-19 |
Family
ID=70662178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921854294.9U Active CN210578323U (en) | 2019-10-30 | 2019-10-30 | Motor interface conversion circuit and converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210578323U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564586A (en) * | 2020-11-30 | 2021-03-26 | 广东美的制冷设备有限公司 | Current protection control method, device, equipment and storage medium of motor |
-
2019
- 2019-10-30 CN CN201921854294.9U patent/CN210578323U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564586A (en) * | 2020-11-30 | 2021-03-26 | 广东美的制冷设备有限公司 | Current protection control method, device, equipment and storage medium of motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201536337U (en) | DSP-based direct-current motor controller based on | |
| CN102664568B (en) | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method | |
| CN210578323U (en) | Motor interface conversion circuit and converter | |
| CN213585564U (en) | Switching power supply | |
| CN105785844B (en) | It is a kind of to isolate speed governing interface circuit and apply its electrical equipment system | |
| CN113364360B (en) | ECM motor gear switching method | |
| CN213358045U (en) | Washing machine control circuit | |
| CN203071864U (en) | Single-phase alternating current motor and speed regulation control circuit thereof | |
| CN209129912U (en) | A kind of multifunctional DC rotation speed of fan controller and control system | |
| CN214101216U (en) | Starting capacitor controller containing novel running capacitor | |
| CN203057067U (en) | Motor and speed regulation control circuit thereof | |
| CN111786609A (en) | Novel machine control circuit and mode of frequency converter | |
| CN205721242U (en) | Drive circuit and home appliance for home appliance | |
| CN112242830A (en) | Speed-regulating solid-state relay for single-phase fan | |
| CN218416222U (en) | Novel motor speed regulation circuit | |
| CN215601206U (en) | Power supply circuit, circuit board and electrical apparatus | |
| CN213740122U (en) | Washing machine control circuit structure | |
| CN113364355B (en) | Motor drive conversion device and three-phase brushless motor equipment | |
| CN214851015U (en) | Gear detection circuit for motor gear switching control and motor controller | |
| CN212627549U (en) | Direct-current brushless motor circuit and direct-current brushless motor | |
| CN215867557U (en) | Silicon controlled rectifier control circuit and PCB | |
| CN211116537U (en) | Air pump speed adjusting device | |
| CN218733214U (en) | Electric rotary tool protection circuit and electric rotary tool | |
| CN210273881U (en) | Torque motor control device | |
| CN213243956U (en) | Speed-regulating solid-state relay for single-phase fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |