CN205319685U - Motor control circuit and electrical equipment - Google Patents
Motor control circuit and electrical equipment Download PDFInfo
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- CN205319685U CN205319685U CN201521098278.3U CN201521098278U CN205319685U CN 205319685 U CN205319685 U CN 205319685U CN 201521098278 U CN201521098278 U CN 201521098278U CN 205319685 U CN205319685 U CN 205319685U
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Abstract
The utility model discloses a motor control circuit and electrical equipment, wherein this motor control circuit includes switch circuit, is used for to drive drive circuit that switch circuit switched on or turn -offed and the speed governing circuit that is used for controlling the motor rotational speed, the first end and the first end of external power source of motor are connected, and the second end of motor is connected with switch circuit's input, and switch circuit's controlled end and drive circuit's output are connected, and switch circuit's the output and the input of speed governing circuit are connected, the output of speed governing circuit is connected with external power source's second end, and PWM control signal is inputed to the controlled end of speed governing circuit. The utility model discloses technical scheme can improve the security of motor control circuit.
Description
Technical field
This utility model relates to technical field of motors, particularly to a kind of motor control circuit and the electrical equipment applying this motor control circuit.
Background technology
Existing motor control circuit adopts controllable silicon to carry out speed governing, live wire is accessed in one end of motor, the other end of motor is connected to band silicon controlled alignment circuit, this motor control circuit is receiving external interference signals, such as thunderstorm hour, controllable silicon can be broken down by high-voltage so that motor can rotate and be in uncontrolled state, thus causing potential safety hazard.
Utility model content
Main purpose of the present utility model is to provide a kind of motor control circuit, it is intended to improve the safety of motor control circuit.
For achieving the above object, the utility model proposes a kind of motor control circuit, including on-off circuit, for driving the drive circuit of on-off circuit on or off and for controlling the alignment circuit of motor rotary speed; First end of described motor is connected with external power source the first end, second end of described motor is connected with the input of described on-off circuit, the controlled end of described on-off circuit is connected with the outfan of described drive circuit, and the outfan of described on-off circuit is connected with the input of described alignment circuit; The outfan of described alignment circuit is connected with the second end of external power source, the controlled end input pwm control signal of described alignment circuit.
Preferably, described on-off circuit includes relay and the first power supply; The input that controls of described relay is connected with the outfan of described drive circuit, and the control output end of described relay is connected with described first power supply; The input that performs of described relay is connected with the second end of described motor, the outfan that performs of described relay is connected with the input of described alignment circuit, the input that execution input is described on-off circuit of described relay, the outfan that execution outfan is described control circuit of described relay.
Preferably, described on-off circuit also includes the first diode; The anode of described first diode is connected with the control output end of described relay, and the negative electrode of described first diode is connected with the control input of described relay.
Preferably, described drive circuit includes the first switching tube, the first resistance and second source;Described second source is connected with the input of described first switching tube; The outfan of described first switching tube is connected with the controlled end of described on-off circuit, and the controlled end of described first switching tube is connected with the first end of described first resistance, and the second of described first resistance terminates into external switch control signal.
Preferably, described drive circuit also includes the second resistance and the first electric capacity; First end of described second resistance is connected with the input of described first switching tube, and the second end of described second resistance is connected with the controlled end of described first switching tube; Described first Capacitance parallel connection is in the two ends of described second resistance.
Preferably, described alignment circuit includes controllable silicon, the 3rd resistance, the 4th resistance and second switch pipe; Described silicon controlled the first end is connected with the input of described on-off circuit, and described silicon controlled the second end is connected with the second end of described external power source, and described silicon controlled controlled end is connected with the outfan of described second switch pipe through described 3rd resistance; The input end grounding of described second switch pipe, the controlled end of described second switch pipe is connected with the first end of described 4th resistance, the second outside pwm control signal of end input of described 4th resistance.
Preferably, described controllable silicon is bidirectional triode thyristor.
Preferably, described alignment circuit also includes the 5th resistance and the second electric capacity; First end of described 5th resistance is connected with described silicon controlled the second end, and the second end of described 5th resistance is connected with described silicon controlled controlled end; Described second Capacitance parallel connection is in described 5th resistance two ends.
Preferably, described alignment circuit also includes the 6th resistance and the 3rd electric capacity; First end of described 6th resistance is connected with the controlled end of described second switch pipe, and the second end of described 6th resistance is connected with the input of described second switch pipe; Described 3rd Capacitance parallel connection is in described 6th resistance two ends.
This utility model also proposes a kind of electrical equipment, described electrical equipment includes motor control circuit as above, and described motor control circuit includes on-off circuit, for driving the drive circuit of on-off circuit on or off and for controlling the alignment circuit of motor rotary speed; First end of described motor is connected with external power source the first end, second end of described motor is connected with the input of described on-off circuit, the controlled end of described on-off circuit is connected with the outfan of described drive circuit, and the outfan of described on-off circuit is connected with the input of described alignment circuit; The outfan of described alignment circuit is connected with the second end of external power source, the controlled end input pwm control signal of described alignment circuit.
Technical solutions of the utility model are by arranging drive circuit, on-off circuit and alignment circuit, achieve a kind of motor control circuit, when the controlled end of alignment circuit is without pwm control signal, motor stops operating, now drive circuit output cut-off signals so that on-off circuit is off, further ensure that motor two ends no current, voltage pass through, achieve the reliable stall of motor, improve the anti-interference of motor control circuit, thus improve the safety of motor.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to the structure according to these accompanying drawings obtains other accompanying drawing.
Fig. 1 is the functional block diagram of this utility model motor control circuit one embodiment;
Fig. 2 is the electrical block diagram of this utility model motor control circuit one embodiment.
Drawing reference numeral illustrates:
| Label | Title | Label | Title |
| 100 | On-off circuit | SCR | Controllable silicon |
| 200 | Drive circuit | Q1 | First switching tube |
| 300 | Alignment circuit | Q2 | Second switch pipe |
| R1 | First resistance | C1 | First electric capacity |
| R2 | Second resistance | C2 | Second electric capacity |
| R3 | 3rd resistance | C3 | 3rd electric capacity |
| R4 | 4th resistance | K | Relay |
| R5 | 5th resistance | VCC1 | First power supply |
| R6 | 6th resistance | VCC2 | Second source |
| D1 | First diode |
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than whole embodiments. Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
It is to be appreciated that relate to the description of " first ", " second " etc. in this utility model only for descriptive purposes, and it is not intended that instruction or imply its relative importance or the implicit quantity indicating indicated technical characteristic. Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature. Additionally; technical scheme between each embodiment can be combined with each other; but must be based on those of ordinary skill in the art are capable of; when technical scheme combination occur conflicting maybe cannot realize time will be understood that the combination of this technical scheme is absent from, also not this utility model require protection domain within.
The utility model proposes a kind of motor control circuit.
With reference to Fig. 1, in this utility model embodiment, this motor control circuit includes on-off circuit 100, for driving the drive circuit 200 of on-off circuit 100 on or off and for controlling the alignment circuit 300 of motor rotary speed; First end of motor (i.e. M shown in Fig. 1) is connected with external power source the first end, second end of described motor is connected with the input of described on-off circuit 100, the controlled end of described on-off circuit 100 is connected with the outfan of described drive circuit 200, and the outfan of described on-off circuit 100 is connected with the input of described alignment circuit 300; The outfan of described alignment circuit 300 is connected with the second end of external power source, the controlled end input pwm control signal of described alignment circuit 300.
In the present embodiment, this motor control circuit can be applicable in household meat mincer, and motor adopts single-phase alternating current to power, and namely the first end of external power source is live wire, and the second end of external power source is zero line.
It should be noted that, use in meat grinder process, when meat grinder is in holding state, motor does not rotate, external power source is it is possible that instantaneous high pressure such as thunder and lightning, and puncture the controllable silicon in alignment circuit 300 and make the charged rotation of motor, therefore in the present embodiment, by arranging an on-off circuit 100 between alignment circuit 300 and motor, when alignment circuit 300 inputs without control signal, on-off circuit 100 disconnects, ensure that meat grinder physical property of motor and external power source when standby disconnects, thus motor does not have jitter conditions under external high pressure disturbs, improve the safety of motor.
Technical solutions of the utility model are by arranging drive circuit 200, on-off circuit 100 and alignment circuit 300, achieve a kind of motor control circuit, when the controlled end of alignment circuit 300 is without pwm control signal, motor stops operating, now drive circuit 200 exports cut-off signals, on-off circuit 100 is off, further ensure that motor two ends no current, voltage pass through, achieve the reliable stall of motor, improve the anti-interference of motor control circuit, thus improve the safety of motor.
Refer to Fig. 2, specifically, described on-off circuit 100 includes relay K and the first power supply VCC1; The input that controls of described relay K is connected with the outfan of described drive circuit 200, and the control output end of described relay K is connected with described first power supply VCC1; The input that performs of described relay K is connected with the second end of described motor, the outfan that performs of described relay K is connected with the input of described alignment circuit 300, the input that execution input is described on-off circuit 100 of described relay K, the outfan that execution outfan is described on-off circuit 100 of described relay K.
In the present embodiment, the first power supply VCC1 is voltage is the DC source bearing 12V (volt). Relay K adopts relay open in usual. With the side of coil for controlling end in relay K, the side with contact is actuating station.
It should be noted that when drive circuit 200 exports high level, after the energising of relay K coil, the contact adhesive of relay K, relay K closes, and on-off circuit 100 turns on.
Further, described on-off circuit 100 also includes the first diode D1; The described anode of the first diode D1 is connected with the control output end of described relay K, and the described negative electrode of the first diode D1 is connected with the control input of described relay K.
It should be noted that after relay K coil blackout, coil also stores electric energy, by the first diode D1, the electric energy in coil is released, so that can quick pick-up when relay K receives Continuity signal.
Specifically, described drive circuit 200 includes the first switching tube Q1, the first resistance R1 and second source VCC2; The input of described second source VCC2 and described first switching tube Q1 is connected; The outfan of described first switching tube Q1 is connected with the controlled end of described on-off circuit 100, and the controlled end of described first switching tube Q1 is connected with first end of described first resistance R1, and the second of described first resistance R1 terminates into external switch control signal.
In the present embodiment, the first switching tube Q1 adopts PNP type triode to realize, and second source VCC2 is positive 5V DC source. When outside switching signal is high level, the first switching tube Q1 conducting so that relay K adhesive; When outside switching signal is low level, the first switching tube Q1 disconnects so that relay K disconnects.
Further, described drive circuit 200 also includes the second resistance R2 and the first electric capacity C1; First end of described second resistance R2 is connected with the input of described first switching tube Q1, and second end of described second resistance R2 is connected with the controlled end of described first switching tube Q1; Described first electric capacity C1 is parallel to the two ends of described second resistance R2.
It should be noted that the second resistance R2 and the first electric capacity C1 forms RC absorbing circuit, it is used for absorbing external interference signals, it is prevented that the first switching tube Q1 misleads.
Preferably, described alignment circuit 300 includes controllable silicon SCR, the 3rd resistance R3, the 4th resistance R4 and second switch pipe Q2; First end of described controllable silicon SCR is connected with the input of described on-off circuit 100, second end of described controllable silicon SCR is connected with the second end of described external power source, and the controlled end of described controllable silicon SCR is connected through the outfan of described 3rd resistance R3 with described second switch pipe Q2; The input end grounding of described second switch pipe Q2, the controlled end of described second switch pipe Q2 is connected with first end of described 4th resistance R4, the second outside pwm control signal of end input of described 4th resistance R4.
In the present embodiment, described controllable silicon SCR is bidirectional triode thyristor SCR, i.e. bidirectional thyristor; Second switch pipe Q2 is NPN type triode. 3rd resistance R3 and the 4th resistance R4 is current-limiting resistance.
It should be noted that when pwm control signal is high level, second switch pipe Q2 turns on, and now the controlled end of controllable silicon SCR is low level, controllable silicon SCR turns on; When pwm control signal is low level, second switch pipe Q2 turns off, and controllable silicon SCR turns off. The rotating speed of motor can be adjusted by adjusting the dutycycle of pwm control signal.
Further, described alignment circuit 300 also includes the 5th resistance R5 and the second electric capacity C2; Described first end of the 5th resistance R5 is connected with the second end of described controllable silicon SCR, and described second end of the 5th resistance R5 is connected with the controlled end of described controllable silicon SCR; Described second electric capacity C2 is parallel to the two ends of described 5th resistance R5.
It should be noted that the 5th resistance R5 and the second electric capacity C2 constitutes RC absorbing circuit, it is used for absorbing external interference signals, it is prevented that controllable silicon SCR misleads.
Further, described alignment circuit 300 also includes the 6th resistance R6 and the 3rd electric capacity C3; First end of described 6th resistance R6 is connected with the controlled end of described second switch pipe Q2, and second end of described 6th resistance R6 is connected with the input of described second switch pipe Q2; Described 3rd electric capacity C3 is parallel to the two ends of described 6th resistance R6.
It should be noted that the 6th resistance R6 and the 3rd electric capacity C3 forms RC absorbing circuit, it is used for absorbing external interference signals, it is prevented that second switch pipe Q2 misleads.
Technical solutions of the utility model by arranging on-off circuit 100 between motor and alignment circuit 300, it is ensured that motor is when standby, and motor does not have shake, improves the safety of motor control circuit.
This utility model also proposes a kind of electrical equipment, this electrical equipment includes described motor control circuit, the concrete structure of this motor control circuit is with reference to above-described embodiment, owing to this electrical equipment have employed whole technical schemes of above-mentioned all embodiments, therefore at least having all beneficial effects that the technical scheme of above-described embodiment is brought, this is no longer going to repeat them.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every under inventive concept of the present utility model; utilize the equivalent structure transformation that this utility model description and accompanying drawing content are made, or directly/be indirectly used in other relevant technical fields and be included in scope of patent protection of the present utility model.
Claims (10)
1. a motor control circuit, it is characterised in that include on-off circuit, for driving the drive circuit of on-off circuit on or off and for controlling the alignment circuit of motor rotary speed; First end of described motor is connected with external power source the first end, second end of described motor is connected with the input of described on-off circuit, the controlled end of described on-off circuit is connected with the outfan of described drive circuit, and the outfan of described on-off circuit is connected with the input of described alignment circuit; The outfan of described alignment circuit is connected with the second end of external power source, the controlled end input pwm control signal of described alignment circuit.
2. motor control circuit as claimed in claim 1, it is characterised in that described on-off circuit includes relay and the first power supply; The input that controls of described relay is connected with the outfan of described drive circuit, and the control output end of described relay is connected with described first power supply; The input that performs of described relay is connected with the second end of described motor, the outfan that performs of described relay is connected with the input of described alignment circuit, the input that execution input is described on-off circuit of described relay, the outfan that execution outfan is described on-off circuit of described relay.
3. motor control circuit as claimed in claim 2, it is characterised in that described on-off circuit also includes the first diode;The anode of described first diode is connected with the control output end of described relay, and the negative electrode of described first diode is connected with the control input of described relay.
4. motor control circuit as claimed in claim 1, it is characterised in that described drive circuit includes the first switching tube, the first resistance and second source; Described second source is connected with the input of described first switching tube; The outfan of described first switching tube is connected with the controlled end of described on-off circuit, and the controlled end of described first switching tube is connected with the first end of described first resistance, and the second of described first resistance terminates into external switch control signal.
5. motor control circuit as claimed in claim 4, it is characterised in that described drive circuit also includes the second resistance and the first electric capacity; First end of described second resistance is connected with the input of described first switching tube, and the second end of described second resistance is connected with the controlled end of described first switching tube; Described first Capacitance parallel connection is in the two ends of described second resistance.
6. motor control circuit as claimed in claim 1, it is characterised in that described alignment circuit includes controllable silicon, the 3rd resistance, the 4th resistance and second switch pipe; Described silicon controlled the first end is connected with the input of described on-off circuit, and described silicon controlled the second end is connected with the second end of described external power source, and described silicon controlled controlled end is connected with the outfan of described second switch pipe through described 3rd resistance; The input end grounding of described second switch pipe, the controlled end of described second switch pipe is connected with the first end of described 4th resistance, the second outside pwm control signal of end input of described 4th resistance.
7. motor control circuit as claimed in claim 6, it is characterised in that described controllable silicon is bidirectional triode thyristor.
8. motor control circuit as claimed in claim 7, it is characterised in that described alignment circuit also includes the 5th resistance and the second electric capacity; First end of described 5th resistance is connected with described silicon controlled the second end, and the second end of described 5th resistance is connected with described silicon controlled controlled end; Described second Capacitance parallel connection is in described 5th resistance two ends.
9. motor control circuit as claimed in claim 8, it is characterised in that described alignment circuit also includes the 6th resistance and the 3rd electric capacity; First end of described 6th resistance is connected with the controlled end of described second switch pipe, and the second end of described 6th resistance is connected with the input of described second switch pipe; Described 3rd Capacitance parallel connection is in described 6th resistance two ends.
10. an electrical equipment, it is characterised in that described electrical equipment includes the motor control circuit as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098278.3U CN205319685U (en) | 2015-12-24 | 2015-12-24 | Motor control circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098278.3U CN205319685U (en) | 2015-12-24 | 2015-12-24 | Motor control circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205319685U true CN205319685U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521098278.3U Active CN205319685U (en) | 2015-12-24 | 2015-12-24 | Motor control circuit and electrical equipment |
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| Country | Link |
|---|---|
| CN (1) | CN205319685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144708A1 (en) * | 2018-01-26 | 2019-08-01 | 上海摩软通讯技术有限公司 | Motor control device for smart terminal and smart terminal |
-
2015
- 2015-12-24 CN CN201521098278.3U patent/CN205319685U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144708A1 (en) * | 2018-01-26 | 2019-08-01 | 上海摩软通讯技术有限公司 | Motor control device for smart terminal and smart terminal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" | ||
| CP03 | "change of name, title or address" |
Address after: Room 403a, Skyworth Digital Building, Songbai Road, Shiyan street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Shenzhen toptec Technology Co.,Ltd. Address before: 518000 floor 2-6, No.3, liaokeng No.3 Industrial Zone, Baoyuan community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TOP-TEK ELECTRONICS Co.,Ltd. |