CN201096829Y - DC motor current detection circuit - Google Patents
DC motor current detection circuit Download PDFInfo
- Publication number
- CN201096829Y CN201096829Y CNU200720184460XU CN200720184460U CN201096829Y CN 201096829 Y CN201096829 Y CN 201096829Y CN U200720184460X U CNU200720184460X U CN U200720184460XU CN 200720184460 U CN200720184460 U CN 200720184460U CN 201096829 Y CN201096829 Y CN 201096829Y
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- China
- Prior art keywords
- detection circuit
- current detection
- direct current
- current generator
- motor
- 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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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The utility model discloses a DC motor current detection circuit, which is in series connection with a non-inductance resistor R1 for the sampling of the DC motor operating current signal on the low-end of an IGBT for the control of the DC motor. The current signal acquired from the non-inductance resistor R1 is input to a control unit after the sample maintaining and the operational amplification. The DC motor current detection circuit is simple in structure with fast reaction speed and without the interference from dust. Moreover the operation is stable with low maintenance costs.
Description
Technical field
The utility model relates to the DC MOTOR CONTROL field, relates in particular to the direct current generator current detection circuit.
Background technology
At the requirement that mechanical separator speed detects, many detection modes have been designed in the prior art.Wherein the rotating speed of direct current generator just detects and has adopted detection techniques such as magnetic induction, photoelectric sensing, high-side current sampling to detect rotating speed by the electric current that detects direct current generator.This class technology utilization of magnetic induction, photoelectric sensing is based on sensor technology, therefore sensor must be installed in the synchronous operated parts of direct current generator on, thereby obtain the direct current generator electric current.In the work, the magnetic inductor reaction velocity is slow, and photoelectric sensor is subject to that dust disturbs and easily along bad, so testing instability after the utilization magnetic induction, photoelectric sense technology is subject to external interference.High-side current sample detecting technology is to place between power supply and the load detecting resistance, because the ground connection of controller is floating-point, so the suffered interference of high-side current sample detecting is big.
The utility model content
The technical problems to be solved in the utility model provides a kind of direct current generator current detection circuit, and Speedless sensor is simple in structure, and work is sensitive stable.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: the direct current generator current detection circuit is serially connected with the noninductive resistance R1 of the direct current generator working current signal that is used to sample at the low side of the IGBT that is used to control direct current generator, the current signal that obtains on the described noninductive resistance R1 through sampling keep, computing amplify after Input Control Element.
The utility model adopts technique scheme, and the direct current generator current detection circuit is simple in structure, and reaction velocity is fast, not disturbed by dust, working stability, and maintenance cost is low.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Fig. 1 is the schematic diagram of utility model direct current generator current detection circuit.
Embodiment
As shown in Figure 1, be in series with IGBT and noninductive resistance R1 on the earth return circuit of direct current generator, the G utmost point of IGBT is connected with drive circuit of DC motor, and the E utmost point of IGBT is connected with noninductive resistance R1.Produce very little pressure and incite somebody to action when direct current generator is worked on noninductive resistance R1, the backlash current that produces when this voltage signal is worked with direct current generator is relevant.Be this voltage signal of sampling, the E of IGBT extremely in parallel high frequency sampling switch IC2, the controlled unit controls of this high frequency sampling switch, the signal after the sampling amplifies the back Input Control Element through the operational amplification circuit that comprises operational amplifier IC3.Draw corresponding motor speed by the software operational analysis again.
Claims (1)
1, direct current generator current detection circuit, it is characterized in that: the low side that is used to control the IGBT of direct current generator is serially connected with the noninductive resistance R1 of the direct current generator working current signal that is used to sample, the current signal that obtains on the described noninductive resistance R1 through sampling keep, computing amplify after Input Control Element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720184460XU CN201096829Y (en) | 2007-10-16 | 2007-10-16 | DC motor current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720184460XU CN201096829Y (en) | 2007-10-16 | 2007-10-16 | DC motor current detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096829Y true CN201096829Y (en) | 2008-08-06 |
Family
ID=39923882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720184460XU Expired - Fee Related CN201096829Y (en) | 2007-10-16 | 2007-10-16 | DC motor current detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096829Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915895A (en) * | 2010-07-13 | 2010-12-15 | 杭州电子科技大学 | Dynamic potential detection circuit for DC motor |
| CN103293359A (en) * | 2013-05-23 | 2013-09-11 | 苏州华之杰电讯有限公司 | Current detection circuit |
| CN103344811A (en) * | 2013-06-27 | 2013-10-09 | 浙江联宜电机股份有限公司 | Current detecting circuit of direct-current motor |
-
2007
- 2007-10-16 CN CNU200720184460XU patent/CN201096829Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915895A (en) * | 2010-07-13 | 2010-12-15 | 杭州电子科技大学 | Dynamic potential detection circuit for DC motor |
| CN101915895B (en) * | 2010-07-13 | 2012-07-25 | 杭州电子科技大学 | Dynamic potential detection circuit for DC motor |
| CN103293359A (en) * | 2013-05-23 | 2013-09-11 | 苏州华之杰电讯有限公司 | Current detection circuit |
| CN103344811A (en) * | 2013-06-27 | 2013-10-09 | 浙江联宜电机股份有限公司 | Current detecting circuit of direct-current motor |
| CN103344811B (en) * | 2013-06-27 | 2016-06-08 | 浙江联宜电机股份有限公司 | A kind of DC motor current detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG HIZHEN ELECTRONICS TECHNOLOGY CO., LTD. Free format text: FORMER NAME: HUZHOU HAIZHEN ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 313100 Industrial Park, eight Li Town, Zhejiang, Huzhou Patentee after: Zhejiang Haizhen Electronic Technology Co., Ltd. Address before: 313000 Zhejiang Wuxing Industry Park Huzhou Huzhou vibration Electronic Technology Co., Ltd. Patentee before: Huzhou Haizhen Electronic Scientific And Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20151016 |
|
| EXPY | Termination of patent right or utility model |