CN201405754Y - Current sampling and retaining circuit of automobile motor - Google Patents
Current sampling and retaining circuit of automobile motor Download PDFInfo
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- CN201405754Y CN201405754Y CN2009201524009U CN200920152400U CN201405754Y CN 201405754 Y CN201405754 Y CN 201405754Y CN 2009201524009 U CN2009201524009 U CN 2009201524009U CN 200920152400 U CN200920152400 U CN 200920152400U CN 201405754 Y CN201405754 Y CN 201405754Y
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Abstract
The utility model belongs to the automotive electronic technology and particularly relates to a current sampling and retaining circuit of an automobile motor, which is characterized in that the circuit consists of a sampling circuit (1), a retaining circuit (2) and an amplifying circuit (3), wherein the sampling circuit (1) consists of a sampling resistor R1, a sampling resistor R2, a capacitor C1and a field-effect tube, the retaining circuit (2) consists of a resistor R3, a resistor R4, a resistor R5 and a capacitor C2, and the amplifying circuit consists of a resistor R6, a resistor R7, a resistor R8 and an operational amplifier. The current sampling and retaining circuit can complete the functions of sampling, retaining and amplifying currents of the automobile motor.
Description
Technical field
The utility model belongs to automotive electronic technology, relates to a kind of electric motor of automobile current sample-and-hold circuit.
Background technology
At present, a kind of special IC of electric motor of automobile current sample-and-hold circuit is arranged abroad, but the inner structure of this integrated circuit is underground, and this integrated circuit is not also to China's enterprise marketing.
Summary of the invention
The purpose of this utility model is: propose a kind of electric motor of automobile current sample-and-hold circuit, satisfied the needs that electric motor of automobile carried out accuracy control.
The technical solution of the utility model is: the electric motor of automobile current sample-and-hold circuit is characterized in that it is made up of sample circuit, lock-out circuit and amplifying circuit; Sample circuit is made up of sampling resistor R1, resistance R 2, capacitor C 1 and field effect transistor Q, sampling resistor R1 is connected between sub-A of current input terminal and the terminal B, resistance R 2 and capacitor C 1 are formed the series filtering branch road, one end of resistance R 2 is connected with the sub-A of current input terminal, one end of capacitor C 1 is connected with the sub-B of current input terminal, the source electrode of field effect transistor Q is connected with the series connection point of resistance R 2 with capacitor C 1, and the grid of field effect transistor Q is connected with the sampling control signal mouth; Lock-out circuit is made up of resistance R 3, R4, R5 and capacitor C 2, resistance R 3, R4, R5 connect into T type network, one end of resistance R 3 is connected with the drain electrode of field effect transistor Q, one end of resistance R 4 is connected with the sub-B of current input terminal, one end of resistance R 5 is connected with an end of capacitor C 2, and the other end of capacitor C 2 is connected with the sub-B of current input terminal; Amplifying circuit is made up of resistance R 6, R7, R8 and op amp U, one end of resistance R 6 is connected with the point of connection of resistance R 5 with capacitor C 2, the other end of resistance R 6 is connected with the normal phase input end of op amp U, resistance R 8 is connected between the inverting input and ground of op amp U, feedback resistance R7 is connected between the inverting input and mouth of op amp U, and the mouth of op amp U is connected with the current sampling signal input end.
The utility model has the advantages that: can finish function, satisfy the needs that electric motor of automobile carried out accuracy control electric motor of automobile current sample, maintenance and amplification.
Description of drawings
Fig. 1 is an electric principle schematic of the present utility model.
The specific embodiment
Below the utility model is described in further details.Referring to Fig. 1, the electric motor of automobile current sample-and-hold circuit is characterized in that, it is made up of sample circuit 1, lock-out circuit 2 and amplifying circuit 3; Sample circuit 1 is made up of sampling resistor R1, resistance R 2, capacitor C 1 and field effect transistor Q, sampling resistor R1 is connected between sub-A of current input terminal and the terminal B, resistance R 2 and capacitor C 1 are formed the series filtering branch road, one end of resistance R 2 is connected with the sub-A of current input terminal, one end of capacitor C 1 is connected with the sub-B of current input terminal, the source electrode of field effect transistor Q is connected with the series connection point of resistance R 2 with capacitor C 1, and the grid of field effect transistor Q is connected with the sampling control signal mouth; Lock-out circuit 2 is made up of resistance R 3, R4, R5 and capacitor C 2, resistance R 3, R4, R5 connect into T type network, one end of resistance R 3 is connected with the drain electrode of field effect transistor Q, one end of resistance R 4 is connected with the sub-B of current input terminal, one end of resistance R 5 is connected with an end of capacitor C 2, and the other end of capacitor C 2 is connected with the sub-B of current input terminal; Amplifying circuit 3 is made up of resistance R 6, R7, R8 and op amp U, one end of resistance R 6 is connected with the point of connection of resistance R 5 with capacitor C 2, the other end of resistance R 6 is connected with the normal phase input end of op amp U, resistance R 8 is connected between the inverting input and ground of op amp U, feedback resistance R7 is connected between the inverting input and mouth of op amp U, and the mouth of op amp U is connected with the current sampling signal input end.
Principle of work of the present utility model is: during use, sub-A of current input terminal and terminal B are connected in the electric motor of automobile loop, when the sampling control signal mouth of control unit is exported sampling control signal, field effect transistor Q conducting, motor current signal is gathered in pressure drop by sampling resistor R1, by charging the signal of being gathered is kept then, by op amp holding signal is amplified at last and export back level processing unit to capacitor C 2.
Claims (1)
1, the electric motor of automobile current sample-and-hold circuit is characterized in that, it is made up of sample circuit [1], lock-out circuit [2] and amplifying circuit [3]; Sample circuit [1] is made up of sampling resistor R1, resistance R 2, capacitor C 1 and field effect transistor Q, sampling resistor R1 is connected between sub-A of current input terminal and the terminal B, resistance R 2 and capacitor C 1 are formed the series filtering branch road, one end of resistance R 2 is connected with the sub-A of current input terminal, one end of capacitor C 1 is connected with the sub-B of current input terminal, the source electrode of field effect transistor Q is connected with the series connection point of resistance R 2 with capacitor C 1, and the grid of field effect transistor Q is connected with the sampling control signal mouth; Lock-out circuit [2] is made up of resistance R 3, R4, R5 and capacitor C 2, resistance R 3, R4, R5 connect into T type network, one end of resistance R 3 is connected with the drain electrode of field effect transistor Q, one end of resistance R 4 is connected with the sub-B of current input terminal, one end of resistance R 5 is connected with an end of capacitor C 2, and the other end of capacitor C 2 is connected with the sub-B of current input terminal; Amplifying circuit [3] is made up of resistance R 6, R7, R8 and op amp U, one end of resistance R 6 is connected with the point of connection of resistance R 5 with capacitor C 2, the other end of resistance R 6 is connected with the normal phase input end of op amp U, resistance R 8 is connected between the inverting input and ground of op amp U, feedback resistance R7 is connected between the inverting input and mouth of op amp U, and the mouth of op amp U is connected with the current sampling signal input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201524009U CN201405754Y (en) | 2009-05-06 | 2009-05-06 | Current sampling and retaining circuit of automobile motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201524009U CN201405754Y (en) | 2009-05-06 | 2009-05-06 | Current sampling and retaining circuit of automobile motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201405754Y true CN201405754Y (en) | 2010-02-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201524009U Expired - Fee Related CN201405754Y (en) | 2009-05-06 | 2009-05-06 | Current sampling and retaining circuit of automobile motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201405754Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323648A (en) * | 2013-06-14 | 2013-09-25 | 浙江海振电子科技有限公司 | Current sampling holding circuit |
-
2009
- 2009-05-06 CN CN2009201524009U patent/CN201405754Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323648A (en) * | 2013-06-14 | 2013-09-25 | 浙江海振电子科技有限公司 | Current sampling holding circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: YUBEI STEERING SYSTEM CO., LTD. Free format text: FORMER OWNER: YUBEI (XINXIANG) POWER STEERING SYSTEM CO., LTD. Effective date: 20120625 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120625 Address after: 453003 No. 322 Heping Avenue, Henan, Xinxiang Patentee after: Yubei Steering System Co., Ltd. Address before: 453003 No. 322 Heping Avenue, Henan, Xinxiang Patentee before: Yubei (Xinxiang) Power Steering System Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20170506 |