CN2641882Y - Overcurrent protector for motor of children electric driven cart - Google Patents
Overcurrent protector for motor of children electric driven cart Download PDFInfo
- Publication number
- CN2641882Y CN2641882Y CN 03259793 CN03259793U CN2641882Y CN 2641882 Y CN2641882 Y CN 2641882Y CN 03259793 CN03259793 CN 03259793 CN 03259793 U CN03259793 U CN 03259793U CN 2641882 Y CN2641882 Y CN 2641882Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- motor
- coil
- series
- relay
- 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 - Lifetime
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- Protection Of Generators And Motors (AREA)
Abstract
An over-current protector for a motor of an electric vehicle for children is characterized in that the normally-open contact head J-2 of a relay parallels to a reed switch A whose contact head is normally-opened to form a first circuit, which is in tandem connection with a relay coil J to form a second circuit; the second circuit parallels to a capacitor C to form a third circuit, which is in tandem connection with a diode D to form a fourth circuit; after the tandem connection with the motor M, the normally-closed contact head J-1 of the relay parallels to the fourth circuit; a coil L is tandem connected on the circuit for power supply to the motor M; the coil L and the reed switch A are arranged closely.
Description
Technical field
The utility model relates to a kind of motor overcurrent protection device of children's electric motor vehicle.
Background technology
In the prior art; the motor overcurrent protection device generally adopts the semiconductor overcurrent protector; it is connected in the circuit of powering to motor; this overcurrent protector can generate heat when the electrorheological that passes through is big; high more then its resistance of temperature is big more; when electric current was excessive, the resistance infinity made the motor dead electricity play overcurrent protection.But the protection speed of this overcurrent protector is slow, and sensitivity is low, thereby makes protected motor still can be damaged by overcurrent.
Summary of the invention
The motor overcurrent protection device of the fast children's electric motor vehicle of response speed when the purpose of this utility model is to provide a kind of overcurrent.
The technical solution of the utility model is: a kind of motor overcurrent protection device of children's electric motor vehicle; the tongue tube A that often open relay normally open contact J-2 and contact is in parallel and constitutes first circuit; first circuit again with the relay coil J formation second circuit that is in series; second circuit again with the capacitor C formation tertiary circuit that is in parallel; tertiary circuit is in series with diode D and constitutes the 4th circuit; after being in series, relay normally closed interlock J-1 and motor M be in parallel with the 4th circuit again; on circuit, be in series with coil L, the adjacent setting of described coil L with tongue tube A to motor M power supply.
The utility model compared with prior art has following advantage:
When motor M worked with normal current, the electric current of flowing through coil L was less, and the magnetic field that is produced is not enough to make tongue tube A closure, so does not have electric current on the relay coil J, corresponding normally closed interlock J-1 closure.When the electric current of motor M was excessive, the electrorheological of coil L was big, made tongue tube A closure, then relay coil J gets electricly, and this moment, corresponding contact J-1 disconnected, motor M dead electricity, contact J-2 closure, capacitor C make coil J continue electricly, oppositely discharge through motor M and diode D prevents capacitor C.The utility model is highly sensitive, and reaction speed is fast, the protection reliable in action.
Description of drawings
Accompanying drawing is circuit theory diagrams of the present utility model;
Embodiment
Referring to accompanying drawing; a kind of motor overcurrent protection device of children's electric motor vehicle; the tongue tube A that often open relay normally open contact J-2 and contact is in parallel and constitutes first circuit; first circuit again with the relay coil J formation second circuit that is in series; second circuit again with the capacitor C formation tertiary circuit that is in parallel; tertiary circuit is in series with diode D and constitutes the 4th circuit; after being in series, relay normally closed interlock J-1 and motor M be in parallel with the 4th circuit again; on circuit, be in series with coil L to motor M power supply; the adjacent setting with tongue tube A of described coil L is by shutoff and the conducting of the Current Control tongue tube A on the coil L.
Claims (1)
- A kind of motor overcurrent protection device of children's electric motor vehicle; the tongue tube A that often open relay normally open contact J-2 and contact is in parallel and constitutes first circuit; first circuit again with the relay coil J formation second circuit that is in series; second circuit again with the capacitor C formation tertiary circuit that is in parallel; tertiary circuit is in series with diode D and constitutes the 4th circuit; after being in series, relay normally closed interlock J-1 and motor M be in parallel with the 4th circuit again; on circuit, be in series with coil L, the adjacent setting of described coil L with tongue tube A to motor M power supply.The utility model is highly sensitive, and reaction speed is fast, the protection reliable in action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03259793 CN2641882Y (en) | 2003-07-22 | 2003-07-22 | Overcurrent protector for motor of children electric driven cart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03259793 CN2641882Y (en) | 2003-07-22 | 2003-07-22 | Overcurrent protector for motor of children electric driven cart |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2641882Y true CN2641882Y (en) | 2004-09-15 |
Family
ID=34296194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03259793 Expired - Lifetime CN2641882Y (en) | 2003-07-22 | 2003-07-22 | Overcurrent protector for motor of children electric driven cart |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2641882Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954237A (en) * | 2019-11-22 | 2020-04-03 | 奇瑞汽车股份有限公司 | Engine coolant temperature sensor and vehicle |
-
2003
- 2003-07-22 CN CN 03259793 patent/CN2641882Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954237A (en) * | 2019-11-22 | 2020-04-03 | 奇瑞汽车股份有限公司 | Engine coolant temperature sensor and vehicle |
| CN110954237B (en) * | 2019-11-22 | 2021-11-30 | 奇瑞汽车股份有限公司 | Engine coolant temperature sensor and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130722 Granted publication date: 20040915 |