CN201690224U - Electronic temperature protector - Google Patents
Electronic temperature protector Download PDFInfo
- Publication number
- CN201690224U CN201690224U CN2010202063214U CN201020206321U CN201690224U CN 201690224 U CN201690224 U CN 201690224U CN 2010202063214 U CN2010202063214 U CN 2010202063214U CN 201020206321 U CN201020206321 U CN 201020206321U CN 201690224 U CN201690224 U CN 201690224U
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- resistance
- motor
- semiconductor
- oxide
- electric resistance
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Abstract
The utility model relates to an electronic temperature protector, which comprises an MOS tube, a temperature switch, a first electric resistance, a second electric resistance, an electromotor and a power supply, the MOS tube is provided with a source electrode, a drain electrode, and a grid electrode, the temperature switch, the first electric resistance and the second electric resistance are in turn connected in series and then are connected with the electromotor in parallel, the drain electrode of the MOS tube is connected with a cathode of the electromotor, the source electrode of the MOS tube and the cathode of the second electric resistance are connected with a cathode of a power supply, connecting points between the first electric resistance and the second electric resistance are connected with the grid electrode of the MOS tube, an anode of the electromotor and an anode of the temperature switch are connected with the anode of the power supply. Compared to the prior art, the utility model has advantages of small volume and low price.
Description
Technical field
The utility model relates to a kind of electronic protector, especially relates to a kind of electron temperature protector.
Background technology
In the DC motor use, motor windings had big electric current by causing heating when motor ran into overload or stall situation, will damage motor when situation is serious.At present, general solution is all at a motor power anode or a negative terminal serial connection temperature protector (K), and is shown in Figure 1.This temperature protector generally all uses in the AC power load, and electric current is less.Under the less situation of DC motor running current, also can replace using.But under big (more than the 20A) situation of motor running current, use this temperature protector will be subjected to the influence of electric current and voltage environmental constraints and installing space.Big current temperature protector volume is bigger on the market, and price is also expensive.Can't be assemblied in existing motor interior, and use also uneconomical.If adopt big current temperature protector and big current temperature protector be installed in the motor outside at the bigger motor of running current, can bring the trouble of installation to the motor user, also increase cost of use.
Summary of the invention
The purpose of this utility model is exactly to provide a kind of volume little, low-cost electron temperature protector for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of electron temperature protector; it is characterized in that; comprise metal-oxide-semiconductor; temperature switch; first resistance; second resistance; motor; power supply; described metal-oxide-semiconductor is provided with source electrode; drain electrode; grid; described temperature switch; first resistance; it is in parallel after second resistance is connected successively with motor; the drain electrode of described metal-oxide-semiconductor is connected with the motor negative pole; the source electrode of described metal-oxide-semiconductor; the negative pole of second resistance is connected with power cathode; described first resistance; tie point between second resistance is connected with the grid of metal-oxide-semiconductor, the positive pole of described motor; the positive pole of temperature switch is connected with positive source.
The resistance of described first resistance is 1～5K.
The resistance of described second resistance is 7～12K.
Compared with prior art, the utlity model has following advantage:
1, volume is little, can motor interior be installed respectively according to motor existing space and thermometric requirement, and the motor profile is constant, is user-friendly to;
2, low price, the power MOS pipe long-term work is only considered switching characteristic in saturation conduction or degree of depth cut-off state; can select cheap device for use, and power MOS pipe and resistance is ripe electronic devices and components, in the power electronics circuit, uses in a large number; market purchasing is convenient; low price, in addition, power MOS pipe is a voltage-controlled type; Control current is little; match the temperature switch of little electric current, cheap, realize function with the normal operation of low-power device protection high-power electric appliance.
Description of drawings
Fig. 1 is the circuit diagram of existing temperature protective device;
Fig. 2 is the circuit diagram of the utility model temperature switch closure;
Fig. 3 is the utility model temperature switch dead circuit figure.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
As Fig. 2; shown in Figure 3; a kind of electron temperature protector; comprise metal-oxide-semiconductor Q; temperature switch S; first resistance R 1; second resistance R 2; motor M; power supply; described metal-oxide-semiconductor Q is provided with source electrode; drain electrode; grid; described temperature switch S; first resistance R 1; it is in parallel after second resistance R 2 is connected successively with motor M; the drain electrode of described metal-oxide-semiconductor Q is connected with motor M negative pole; the source electrode of described metal-oxide-semiconductor Q; the negative pole of second resistance R 2 is connected with power cathode; described first resistance R 1; tie point between second resistance R 2 is connected with the grid of metal-oxide-semiconductor Q; described motor M, positive pole; the positive pole of temperature switch S is connected with positive source.
When the switch working state, source, the big operating characteristic of drain electrode saturation conduction pressure drop low current are with power MOS pipe Q serial connection motor negative terminal according to electronic devices and components metal-oxide-semiconductor Q.Utilize the operation principle power controlling metal-oxide-semiconductor Q saturation conduction or the degree of depth of electronic circuit control principle and temperature switch S to end operating state.
Because temperature switch S closure under the normal temperature state, as shown in Figure 2, the voltage that A is ordered between first resistance R 1, second resistance R 2 is enough to make metal-oxide-semiconductor Q to be in saturation conduction, and motor M and 12V power supply constitute the loop, and motor M normally moves.
Because motor M overload or stall cause temperature to raise.Be enough to make temperature switch S to disconnect when temperature raises, as shown in Figure 3, shown in the A voltage of order be 0, make metal-oxide-semiconductor Q be in cut-off state, disconnection motor M and 12V working power loop, motor is out of service.
Temperature switch S recovers closed after temperature is recovered normal temperature, and metal-oxide-semiconductor Q still can saturation conduction, recovers motor M operating loop.The switching function that has possessed the operation of temperature control large-current electric motivation.
Because the grid of metal-oxide-semiconductor Q is that voltage-controlled type, grid Control current are minimum, so can select the temperature switch of the little electric current that volume is little, price is low for use.Realize low current device control heavy-duty motor operational objective, and can be installed in motor interior with metal-oxide-semiconductor Q and control circuit combination.
Claims (3)
1. electron temperature protector; it is characterized in that; comprise metal-oxide-semiconductor; temperature switch; first resistance; second resistance; motor; power supply; described metal-oxide-semiconductor is provided with source electrode; drain electrode; grid; described temperature switch; first resistance; it is in parallel after second resistance is connected successively with motor; the drain electrode of described metal-oxide-semiconductor is connected with the motor negative pole; the source electrode of described metal-oxide-semiconductor; the negative pole of second resistance is connected with power cathode; described first resistance; tie point between second resistance is connected with the grid of metal-oxide-semiconductor, the positive pole of described motor; the positive pole of temperature switch is connected with positive source.
2. a kind of electron temperature protector according to claim 1 is characterized in that the resistance of described first resistance is 1～5K.
3. a kind of electron temperature protector according to claim 1 is characterized in that the resistance of described second resistance is 7～12K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202063214U CN201690224U (en) | 2010-05-26 | 2010-05-26 | Electronic temperature protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202063214U CN201690224U (en) | 2010-05-26 | 2010-05-26 | Electronic temperature protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690224U true CN201690224U (en) | 2010-12-29 |
Family
ID=43378502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202063214U Expired - Lifetime CN201690224U (en) | 2010-05-26 | 2010-05-26 | Electronic temperature protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690224U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023297A (en) * | 2012-12-28 | 2013-04-03 | 深圳市航天新源科技有限公司 | Starting protective circuit suitable for wide voltage input range |
| CN103208781A (en) * | 2013-04-12 | 2013-07-17 | 苏州欧泰克电子科技有限公司 | Control circuit with overheat protection function |
-
2010
- 2010-05-26 CN CN2010202063214U patent/CN201690224U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023297A (en) * | 2012-12-28 | 2013-04-03 | 深圳市航天新源科技有限公司 | Starting protective circuit suitable for wide voltage input range |
| CN103023297B (en) * | 2012-12-28 | 2016-02-17 | 深圳市航天新源科技有限公司 | A kind of starting protection circuit being applicable to wide range input voltage |
| CN103208781A (en) * | 2013-04-12 | 2013-07-17 | 苏州欧泰克电子科技有限公司 | Control circuit with overheat protection function |
| CN103208781B (en) * | 2013-04-12 | 2015-06-17 | 苏州欧泰克电子科技有限公司 | Control circuit with overheat protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |