CN207036999U - Motor terminal abnormal detection circuit - Google Patents
Motor terminal abnormal detection circuit Download PDFInfo
- Publication number
- CN207036999U CN207036999U CN201720916449.1U CN201720916449U CN207036999U CN 207036999 U CN207036999 U CN 207036999U CN 201720916449 U CN201720916449 U CN 201720916449U CN 207036999 U CN207036999 U CN 207036999U
- Authority
- CN
- China
- Prior art keywords
- motor
- resistance
- mcu controllers
- power supply
- resistor
- 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
Links
Landscapes
- Control Of Direct Current Motors (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
The utility model discloses a kind of motor terminal abnormal detection circuit,Including MCU controllers,Protection to error-polarity connection of power supply switchs,First resistor,Second resistance,Detect power supply,Conducting switch,3rd resistor,4th resistance and the 5th resistance,Protection to error-polarity connection of power supply switchs the power supply for being switched on or switched off motor,MCU controller two-ports Va,Vb by first resistor and second resistance respectively with motor just,Negative pole electrically connects,Turn on the first pin connecting detection power supply of switch,Second pin electrically connects with MCU controllers,3rd pin electrically connects through 3rd resistor with one end of motor,4th resistance one end is connected electrically between first resistor and MCU controllers,The other end is grounded,5th resistance one end is connected electrically between second resistance and MCU controllers,The other end is grounded,MCU controllers are by detecting two-port Va,Vb magnitude of voltage judges whether motor is abnormal.The utility model is capable of detecting when motor terminal short circuit, the situation of open circuit, improves the security of automobile.
Description
Technical field
The utility model belongs to electric motor of automobile control field, and in particular to a kind of motor terminal abnormal detection circuit.
Background technology
With raising of the progress and user of automotive engineering to operation comfort demand, many mechanisms in automobile use
Electric device, transmission mechanism motion is driven to realize associative operation by controlled motor.Such as：Power sunroof, electric glass lifting
Device, automatic seat, electronic behind door and power-operated sliding door etc..Currently in order to the security of automobile is improved, using detecting system pair
The running status of motor detect shown in Figure 1, and the detecting system includes MCU controllers, current detection circuit, power supply pole
Property reverse connecting protection switch, when the detecting system detect motor operating state exception（Overcurrent, both positive and negative polarity reversal connection）When system meeting
Stop motor start.But when MCU control protection to error-polarity connection of power supply switches or Relay1 or Relay2 disconnect, motor is in
Stop working state, now in the event of motor breaking either motor shorted on both ends power supply or motor shorted on both ends earth fault
When, MCU can not detect these failures, be likely to result in some major accidents.Such as：When motor does not work, if it happens
Motor shorted on both ends and MCU can not detect this failure, when MCU once by protection to error-polarity connection of power supply switch and Relay1
Or during Relay2 connections, power positive cathode open circuit will be caused to cause automobile power source or other damage of components.
The content of the invention
The purpose of this utility model is for overcome the deficiencies in the prior art, there is provided a kind of motor terminal abnormality detection electricity
Road, the circuit it is simple and with being capable of detecting when motor terminal short circuit power supply, short circuit, the situation of open circuit, improve automobile back door system
Security.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of motor terminal abnormal detection circuit, including MCU controllers, the power supply pole electrically connected respectively with MCU controllers
Property reverse connecting protection switch, first resistor and second resistance, the protection to error-polarity connection of power supply switched for being switched on or switched off motor
Power supply, MCU controllers two-port Va, Vb passes through first resistor and the second resistance positive and negative electrode with motor respectively
Electrical connection, it is characterised in that：Also include detection power supply, conducting switch, 3rd resistor, the 4th resistance and the 5th resistance, it is described to lead
The first pin connecting detection power supply of pass is opened up, second pin electrically connects with MCU controllers, and the 3rd pin is through 3rd resistor and electricity
One end electrical connection of machine, described 4th resistance one end are connected electrically between first resistor and MCU controllers, other end ground connection, institute
State the 5th resistance one end to be connected electrically between second resistance and MCU controllers, other end ground connection, the MCU controllers pass through inspection
Survey two-port Va, Vb magnitude of voltage judge motor terminal whether normally, open circuit, short circuit power supply, short circuit.
The conducting switch uses relay, FET or triode.
Also include two relays, described two relays electrically connect with MCU controllers, for the positive and negative of controlled motor
Turn.
Also include FET, the FET electrically connects with MCU controllers, the rotating speed for controlled motor.
Also include current detection circuit, the current detection circuit electrically connects with MCU controllers, is for detect motor
No excessively stream.
The voltage of the detection power supply is less than or equal to 5V.
The beneficial effects of the utility model：Circuit of the present utility model is simple, turns on the first pin connecting detection of switch
Power supply, second pin electrically connect with MCU controllers, and the 3rd pin electrically connects through 3rd resistor with one end of motor, the 4th resistance
One end is connected electrically between first resistor and MCU controllers, the other end ground connection, the 5th resistance one end be connected electrically in second resistance with
Between MCU controllers, just whether other end ground connection, MCU controllers judge motor by detecting the magnitude of voltage of two-port Va, Vb
Often, open circuit, short circuit power supply, short circuit.The failure of motor terminal can be still detected when motor is in non-working condition, is avoided
If starting motor during motor terminal exception causes automobile power source or other damage of components.
Also include current detection circuit, the current detection circuit electrically connects with MCU controllers, is for detect motor
No excessively stream.When motor works, whether detection current of electric overloads.
Brief description of the drawings
Fig. 1 is the circuit diagram of existing detection circuit；
Fig. 2 is the circuit diagram of utility model detection circuit.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
Shown in Figure 2, a kind of motor terminal abnormal detection circuit, including MCU controllers, protection to error-polarity connection of power supply are opened
Pass, first resistor, second resistance, motor, detection power supply, conducting switch, 3rd resistor, the 4th resistance and the 5th resistance, power supply
Protection to error-polarity connection switch, first resistor, second resistance electrically connect with MCU controllers respectively, and the motor passes through electric power polarity
Reverse connecting protection switch is connected with vehicle body storage battery, and the protection to error-polarity connection of power supply switchs the power supply electricity for being switched on or switched off motor
Source, MCU controllers two-port Va, Vb are electrically connected with the positive and negative electrode of motor respectively by first resistor and second resistance, institute
The first pin connecting detection power supply of conducting switch is stated, the voltage of the detection power supply is less than or equal to 5V, turns on the second of switch
Pin electrically connects with MCU controllers, and the 3rd pin for turning on switch electrically connects through 3rd resistor with one end of motor, the conducting
Switch uses relay, FET or triode；Described 4th resistance one end is connected electrically between first resistor and MCU controllers,
The other end is grounded, and described 5th resistance one end is connected electrically between second resistance and MCU controllers, other end ground connection, the MCU
Controller by detect the magnitude of voltage of two-port Va, Vb judge whether motor terminal normal, open circuit, short circuit power supply, short circuit.
Further：Also include two relays Relay1, Relay2 and a FET, described two relays
Relay1, Relay2 electrically connect with MCU controllers, and two relays Relay1, Relay2 are arranged on protection to error-polarity connection of power supply
Between switch and motor, the forward and backward for controlled motor.The FET electrically connects with MCU controllers, for controlling electricity
The rotating speed of machine.
Further：Also include current detection circuit, the current detection circuit electrically connects with MCU controllers, for examining
Measured motor whether excessively stream.
Using the utility model, when motor is in non-working condition, the abnormal method in detection motor port is as follows：
Assuming that the voltage of detection power supply is Vt, and in the present embodiment, Vt=5v, wherein R1=R2, R4=R5, when motor is in not
During working condition, MCU controllers can control protection to error-polarity connection of power supply switch and Relay1, Relay2 to disconnect, and control conducting
Switch connection.Because the internal resistance of motor is very small, can be ignored.The magnitude of voltage that MCU controllers are detected by port Va, Vb
To judge whether motor terminal is abnormal, and abnormal conditions include：Open circuit, short circuit power supply, short circuit.
1st, when motor is in non-working condition, and motor both ends are normal：
Va=
Vb=
When MCU controllers detect such a situation, you can judge that motor both ends are normal.
2nd, when motor is in non-working condition, and during motor breaking：
Va=
Vb=0V
When MCU controllers detect such a situation, you can be determined as motor breaking.
3rd, when motor is in non-working condition, and during motor terminal short circuit power supply：
Va=
Vb=
When MCU controllers detect such a situation, you can be determined as motor terminal short circuit power supply.
4th, when motor is in non-working condition, and motor terminal short circuit when：
Va=0V
Vb=0V
When MCU controllers detect such a situation, you can with being determined as motor terminal short circuit.
Using the utility model, the failure of motor terminal can be still detected when motor is in non-working condition, is avoided
If starting motor during motor terminal exception causes automobile power source or other damage of components.
Claims (6)
1. a kind of motor terminal abnormal detection circuit, including MCU controllers, the electric power polarity electrically connected respectively with MCU controllers
Reverse connecting protection switch, first resistor and second resistance, the protection to error-polarity connection of power supply are switched for being switched on or switched off motor
Power supply, MCU controllers two-port Va, Vb are electric with the positive and negative electrode of motor respectively by first resistor and second resistance
Connection, it is characterised in that：Also include detection power supply, conducting switch, 3rd resistor, the 4th resistance and the 5th resistance, the conducting
First pin connecting detection power supply of switch, second pin electrically connect with MCU controllers, and the 3rd pin is through 3rd resistor and motor
One end electrical connection, described 4th resistance one end is connected electrically between first resistor and MCU controllers, other end ground connection, described
5th resistance one end is connected electrically between second resistance and MCU controllers, and other end ground connection, the MCU controllers pass through detection
The magnitude of voltage of two-port Va, Vb judge whether motor terminal normal, open circuit, short circuit power supply, short circuit.
2. motor terminal abnormal detection circuit according to claim 1, it is characterised in that：The conducting switch uses relay
Device, FET or triode.
3. motor terminal abnormal detection circuit according to claim 1, it is characterised in that：Also include two relays, institute
State two relays to electrically connect with MCU controllers, the forward and backward for controlled motor.
4. motor terminal abnormal detection circuit according to claim 1, it is characterised in that：Also include FET, it is described
FET electrically connects with MCU controllers, the rotating speed for controlled motor.
5. motor terminal abnormal detection circuit according to claim 1, it is characterised in that：Also include current detection circuit,
The current detection circuit electrically connects with MCU controllers, for detect motor whether excessively stream.
6. motor terminal abnormal detection circuit according to claim 1, it is characterised in that：The voltage of the detection power supply is small
In equal to 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916449.1U CN207036999U (en) | 2017-07-26 | 2017-07-26 | Motor terminal abnormal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916449.1U CN207036999U (en) | 2017-07-26 | 2017-07-26 | Motor terminal abnormal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207036999U true CN207036999U (en) | 2018-02-23 |
Family
ID=61462860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720916449.1U Expired - Fee Related CN207036999U (en) | 2017-07-26 | 2017-07-26 | Motor terminal abnormal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207036999U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525570A (en) * | 2017-08-30 | 2017-12-29 | 谭梦淑 | A kind of prompting and positioner based on weight detecting and fault detect |
| EP3623824A1 (en) * | 2018-09-17 | 2020-03-18 | Contemporary Amperex Technology Co., Limited | Load state detection circuit and method |
| CN113567839A (en) * | 2021-07-29 | 2021-10-29 | 深圳市火乐科技发展有限公司 | Circuit detection system and projection equipment |
| CN113777538A (en) * | 2020-06-09 | 2021-12-10 | 光宝电子(广州)有限公司 | Test fixture and detection method using same |
-
2017
- 2017-07-26 CN CN201720916449.1U patent/CN207036999U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525570A (en) * | 2017-08-30 | 2017-12-29 | 谭梦淑 | A kind of prompting and positioner based on weight detecting and fault detect |
| EP3623824A1 (en) * | 2018-09-17 | 2020-03-18 | Contemporary Amperex Technology Co., Limited | Load state detection circuit and method |
| US10983154B2 (en) | 2018-09-17 | 2021-04-20 | Contemporary Amperex Technology Co., Limited | Load state detection circuit and method |
| US11360136B2 (en) | 2018-09-17 | 2022-06-14 | Contemporary Amperex Technology Co., Limited | Load state detection circuit and method |
| CN113777538A (en) * | 2020-06-09 | 2021-12-10 | 光宝电子(广州)有限公司 | Test fixture and detection method using same |
| CN113567839A (en) * | 2021-07-29 | 2021-10-29 | 深圳市火乐科技发展有限公司 | Circuit detection system and projection equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207036999U (en) | Motor terminal abnormal detection circuit | |
| CN105137336B (en) | Detect the diagnostic method of electric automobile high-voltage relay failure | |
| CN105150854B (en) | A kind of electric automobile high-voltage safety system | |
| CN103633921B (en) | Motor driver and the electrical power turning facilities including motor driver | |
| CN106877277B (en) | A kind of control relay circuit, vehicle control electronics and vehicle | |
| CN209070008U (en) | Vehicle-mounted high side switches with current detection function | |
| CN104793135A (en) | Hybrid electric vehicle relay state detection circuit and method thereof | |
| CN108798351A (en) | Automotive window speed control circuit and method | |
| CN115332013A (en) | High-voltage direct-current intelligent relay control circuit | |
| CN103303159A (en) | Electric automobile controller and dual-driving control method thereof | |
| CN111880088A (en) | Relay bilateral control and diagnosis circuit and method and battery management system | |
| CN107503620A (en) | A kind of push rod controller | |
| CN103353569A (en) | Relay connection state detecting apparatus | |
| CN110843529A (en) | High-voltage interlocking fault self-diagnosis circuit, control method and new energy automobile | |
| CN208000876U (en) | A kind of protection circuit of relay contact in electric machine control system | |
| CN108776286A (en) | A kind of method and circuit of Insulation monitoring | |
| CN202141790U (en) | Fault detect circuit for relay of main controller of pure electric car | |
| CN210775757U (en) | Relay state detection system for high-voltage power distribution unit of all-in-one controller | |
| CN100428620C (en) | Vehicle electric booster steering system controller | |
| CN205117586U (en) | Starter control system | |
| CN203502562U (en) | Relay state detection circuit | |
| CN103592937A (en) | Fault detection system of vehicle body control modules | |
| CN207106198U (en) | Feedback circuit, charging equipment and electric car | |
| CN111766503A (en) | Drive failure diagnosis circuit | |
| CN211592253U (en) | Electric automobile high-voltage relay with state detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20180223 |