CN201328094Y - Motor control circuit - Google Patents
Motor control circuit Download PDFInfo
- Publication number
- CN201328094Y CN201328094Y CNU2008201834481U CN200820183448U CN201328094Y CN 201328094 Y CN201328094 Y CN 201328094Y CN U2008201834481 U CNU2008201834481 U CN U2008201834481U CN 200820183448 U CN200820183448 U CN 200820183448U CN 201328094 Y CN201328094 Y CN 201328094Y
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- CN
- China
- Prior art keywords
- motor
- output device
- control unit
- contact
- normally
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a motor control circuit without damaging a motor due to abnormal control, which comprises a control unit and an output unit, wherein the output unit comprises a forward output device and a reverse output device, which both comprise a group of normally open and normally closed switches, and the forward and reverse output ends of the control unit are respectively connected with the control ends of the forward output device and the reverse output device; the middle contact, the normally open contact, the normally closed contact of the forward output device are respectively connected with a power supply, the forward end of the motor and the middle contact of the reverse output device; and the normally open contact of the reverse output device is connected with the reverse end of the motor. The control unit selects two relays as the forward output device and the reverse output device, which are designed into an interlocking structure, so that the forward end and the reverse end of the motor can not be supplied power simultaneously even if the control unit is abnormal, thereby ensuring the safety of the motor.
Description
Technical field
The utility model relates to a kind of control circuit of motor.
Background technology
The control circuit of present motor, its structure comprises: the output unit of the rotating of control unit and control motor.The circuit of control positive and negative rotation of motor is separate in this output unit, under the software control in control unit, according to the instruction that control unit sends, the just commentaries on classics end or the counter-rotating end of motor is powered, and realizes the forward or reverse of motor.But in actual use, owing to abnormal conditions occur, the software in the control unit gets muddled, and might power simultaneously to the just commentaries on classics end or the counter-rotating end of motor, will cause short circuit like this, burns out motor.
The utility model content
A technical problem to be solved in the utility model is: provide a kind of can be because of the control circuit that control abnormity makes the impaired motor of motor not occurring.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of control circuit of motor, comprise: control unit and output unit, described output unit comprises: just transferring out device and counter-rotating output device, just, all comprise one group of normally-open normally-close switch in the counter-rotating output device, described control unit just, inversion output terminal respectively with just, anyway the control end of output device links to each other, just transferring out the intermediate contact of device, normally opened contact, normally-closed contact respectively with power supply, the intermediate contact that just changes end and counter-rotating output device of motor links to each other, and the normally opened contact of counter-rotating output device links to each other with the counter-rotating end of motor.
The described device that just transferring out is two relays with the counter-rotating output device, and described control unit is a microprocessor.
The beneficial effects of the utility model are: the control unit in the utility model has selected for use two relays as the forward and backward output device, and it is arranged to interlocking structure, so just can guarantee, even occur when unusual at control unit, can the forward and backward end of motor not powered up simultaneously yet, thereby can guarantee the safety of motor.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among the figure: 1, control unit, 2, output unit, 21, first relay, 22, second relay, 3, motor.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.
As Fig. 1, shown in Figure 2, the control circuit of a kind of motor described in the utility model, comprise: control unit 1 and output unit 2, output unit 2 comprises again: just transferring out device i.e. first relay 21 and i.e. second relay 22 of output device that reverses, all comprise one group of normally-open normally-close switch in first relay 21 and second relay 22, the output that just changes of described control unit 1 is that resistance R 1 end that links to each other with the collector electrode of triode Q1 links to each other with the control end of line bag in first relay 21, the inversion output terminal of described control unit 1 is that resistance R 2 end that links to each other with the collector electrode of triode Q2 links to each other with the control end of line bag in second relay 22, the intermediate contact of first relay 21, normally opened contact, normally-closed contact respectively with power supply VCC, the end that just changes of motor 3 links to each other with the intermediate contact of second relay 22, and the normally opened contact of second relay 22 links to each other with the counter-rotating end of motor 3.
The course of work of the present utility model is: when 21 outages of first relay, contact and normally-closed contact conducting in the middle of it, the intermediate contact energising of such second relay 22, owing to do not have on the normally opened contact of first relay 21, motor 3 can not just change, but can power up by giving second relay 2, allow motor 3 reverse; And when 21 energisings of first relay, contact and normally opened contact conducting in the middle of it, motor 3 beginnings are just changeed, because the intermediate contact of first relay 21 and normally-closed contact disconnect, cause the intermediate contact and the normally-closed contact outage of second relay 22, in this case, even give second relay 22 energisings, motor 3 also can not reverse.
Claims (2)
1. the control circuit of motor, comprise: control unit and output unit, it is characterized in that: described output unit comprises: just transferring out device and counter-rotating output device, all comprise one group of normally-open normally-close switch in the forward and backward output device, the forward and backward output of described control unit links to each other with the control end of positive and negative positive output device respectively, the intermediate contact, normally opened contact, the normally-closed contact that are just transferring out device link to each other with the intermediate contact that just changes end and counter-rotating output device of power supply, motor respectively, and the normally opened contact of counter-rotating output device links to each other with the counter-rotating end of motor.
2. the control circuit of motor as claimed in claim 1 is characterized in that: describedly just transferring out device and the counter-rotating output device is two relays, described control unit is a microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201834481U CN201328094Y (en) | 2008-12-19 | 2008-12-19 | Motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201834481U CN201328094Y (en) | 2008-12-19 | 2008-12-19 | Motor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328094Y true CN201328094Y (en) | 2009-10-14 |
Family
ID=41180055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201834481U Expired - Fee Related CN201328094Y (en) | 2008-12-19 | 2008-12-19 | Motor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201328094Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570931A (en) * | 2010-12-14 | 2012-07-11 | 海洋王照明科技股份有限公司 | Power polarity conversion circuit |
| CN102788035A (en) * | 2012-08-01 | 2012-11-21 | 杭州新都奥兰汽车空调有限公司 | Forward and reverse rotation device of condensing fan |
-
2008
- 2008-12-19 CN CNU2008201834481U patent/CN201328094Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570931A (en) * | 2010-12-14 | 2012-07-11 | 海洋王照明科技股份有限公司 | Power polarity conversion circuit |
| CN102788035A (en) * | 2012-08-01 | 2012-11-21 | 杭州新都奥兰汽车空调有限公司 | Forward and reverse rotation device of condensing fan |
| CN102788035B (en) * | 2012-08-01 | 2015-06-03 | 杭州新都奥兰汽车空调有限公司 | Forward and reverse rotation device of condensing fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20161219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |