CN203747380U - Motor current limiting protection device - Google Patents
Motor current limiting protection device Download PDFInfo
- Publication number
- CN203747380U CN203747380U CN201420057033.5U CN201420057033U CN203747380U CN 203747380 U CN203747380 U CN 203747380U CN 201420057033 U CN201420057033 U CN 201420057033U CN 203747380 U CN203747380 U CN 203747380U
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- CN
- China
- Prior art keywords
- circuit
- amplifier
- cpu
- motor
- motor current
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- 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 relates to a motor current limiting protection device. The device comprises a power supply, a motor winding, a driving circuit which is electrically connected with the motor winding, and a detection circuit. A CPU is electrically connected with the driving circuit and the detection circuit. The driving circuit is a bridge switch circuit. The CPU is further connected with a Hall sensor. The Hall sensor and the motor winding are magnetically coupled. The CPU comprises two PWM output ends which are respectively connected with the signal control end of the bridge switch circuit of the driving circuit. The detection circuit comprises an amplifier, a detection resistor and two voltage dividing resistors which are connected in series. The detection resistor is connected with the negative input end of the amplifier. The nodes of two voltage dividing resistors are connected with the positive input end of the amplifier. The output end of the amplifier is connected with the signal acquisition end of the CPU. The power supply powers each part of the motor current limiting protection device. By adopting the structure, the motor current limiting protection device has the advantages of simple circuit structure and convenient manufacture, and the motor control is effective and timely.
Description
Technical field
The utility model relates to a kind of motor, especially relates to a kind of motor current-limiting protective device that can reduce motor noise.
Background technology
Along with the development of modern electronic technology, the function of electronic devices and components from strength to strength, its power consumption is also increasing, and that the volume of electronic devices and components also becomes is more and more less, only rely on the heat radiation of device itself cannot meet the demands, therefore need to fin be installed in chip appearance, even need to install active heat radiating device, as cooling fan, but cooling fan needs the driving of motor, motor drives fan running to produce a large amount of noises, this is difficult to accept for the office space needing peace and quiet, therefore need motor to carry out speed governing to control the rotating speed of motor and then to reduce noise, and in the process of speed governing, need motor to carry out current-limiting protection.
Utility model content
In order to overcome above-mentioned technical problem, the utility model provides a kind of motor current-limiting protective device simple in structure, and the technical scheme of employing is as follows:
Motor current-limiting protective device, comprise power supply and motor winding, also comprise drive circuit and the circuit for detecting of electrical connection motor winding, a CPU is electrically connected described drive circuit and circuit for detecting, drive circuit is bridge switching circuit, CPU also connects a Hall element, Hall element and motor winding magnetic coupling, described CPU has two PWM outputs, connect respectively the signal controlling end of the bridge switching circuit of drive circuit, described circuit for detecting comprises amplifier, the divider resistance of a detecting resistance and two series connection, detecting resistance connects the negative input end of amplifier, the node of two divider resistances connects the positive input terminal of amplifier, the output of amplifier connects the signals collecting end of CPU, the electric energy of power supply supply motor current-limiting protective device all parts.
Adopt said structure, circuit structure is simple, easily manufactured, and the control of motor more effectively in real time, can effectively reduce the noise of electric machine rotation.
Brief description of the drawings
Fig. 1 is the circuit diagram of motor current-limiting protective device.
Wherein: 1-motor winding, 2-drive circuit, 3-circuit for detecting, 4-power supply, 5-Hall element, 6-CPU, 7,8-PWM output, 9,10-divider resistance, 11-detects resistance.
Embodiment
A kind of circuit diagram of motor current-limiting protective device as shown in Figure 1, comprise power supply 4 and motor winding 1, also comprise drive circuit 2 and the circuit for detecting 3 of electrical connection motor winding 1, a CPU6 is electrically connected described drive circuit 2 and circuit for detecting 3, drive circuit 2 is bridge switching circuit, CPU6 also connects a Hall element 5, Hall element 5 and motor winding 1 magnetic coupling, described CPU6 has two PWM outputs 7, 8, connect respectively the signal controlling end of the bridge switching circuit of drive circuit 2, described circuit for detecting 3 comprises amplifier, the divider resistance 9 of a detecting resistance 11 and two series connection, 10, detecting resistance 11 connects the negative input end of amplifier, two divider resistances 9, 10 node connects the positive input terminal of amplifier, the output of amplifier connects the signals collecting end of CPU6, power supply 4 is supplied the electric energy of motor current-limiting protective device all parts.Adopt said structure, circuit structure is simple, easily manufactured, and the control of motor more effectively in real time, can effectively reduce the noise of electric machine rotation.
The above, be only embodiment of the present utility model, and in the scope that those of ordinary skill in the art disclose at the utility model, the variation that can expect easily, within all should being encompassed in the protection range of utility model.
Claims (1)
1. motor current-limiting protective device, comprise power supply and motor winding, it is characterized in that also comprising drive circuit and the circuit for detecting of electrical connection motor winding, a CPU is electrically connected described drive circuit and circuit for detecting, drive circuit is bridge switching circuit, CPU also connects a Hall element, Hall element and motor winding magnetic coupling, described CPU has two PWM outputs, connect respectively the signal controlling end of the bridge switching circuit of drive circuit, described circuit for detecting comprises amplifier, the divider resistance of a detecting resistance and two series connection, detecting resistance connects the negative input end of amplifier, the node of two divider resistances connects the positive input terminal of amplifier, the output of amplifier connects the signals collecting end of CPU, the electric energy of power supply supply motor current-limiting protective device all parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420057033.5U CN203747380U (en) | 2014-01-24 | 2014-01-24 | Motor current limiting protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420057033.5U CN203747380U (en) | 2014-01-24 | 2014-01-24 | Motor current limiting protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203747380U true CN203747380U (en) | 2014-07-30 |
Family
ID=51347139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420057033.5U Expired - Fee Related CN203747380U (en) | 2014-01-24 | 2014-01-24 | Motor current limiting protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203747380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474296A (en) * | 2018-05-11 | 2019-11-19 | 艾默生环境优化技术(苏州)有限公司 | Motor device, compressor apparatus and the method for manufacturing motor device |
-
2014
- 2014-01-24 CN CN201420057033.5U patent/CN203747380U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474296A (en) * | 2018-05-11 | 2019-11-19 | 艾默生环境优化技术(苏州)有限公司 | Motor device, compressor apparatus and the method for manufacturing motor device |
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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: 20140730 Termination date: 20150124 |
|
| EXPY | Termination of patent right or utility model |