CN86207960U - Multifunctional electric motor-protecting device - Google Patents
Multifunctional electric motor-protecting device Download PDFInfo
- Publication number
- CN86207960U CN86207960U CN 86207960 CN86207960U CN86207960U CN 86207960 U CN86207960 U CN 86207960U CN 86207960 CN86207960 CN 86207960 CN 86207960 U CN86207960 U CN 86207960U CN 86207960 U CN86207960 U CN 86207960U
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- CN
- China
- Prior art keywords
- electric motor
- protecting device
- multifunctional electric
- switch
- relay
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- 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.)
- Withdrawn
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Abstract
The utility model discloses an electric motor-protecting device, in particular to a multifunctional electric motor-protecting device. The multifunctional electric motor-protecting device is composed of a mini-type toggle switch, a duplex self-locking switch, a transformer, a bridge rectification circuit, an electrolytic condenser, a resistor, a transistor, a thermistor, a relay, the normally open contact of the relay, the magnetic coil of an alternating current contactor, etc. The multifunctional electric motor-protecting device is suitable for the protection of various single-phase electric motors and three-phase electric motors with big power and small power; the volume and the weight are both smaller for tenth than the existing protecting device. The multifunctional electric motor-protecting device has the advantages of convenient material fetching, simple line, easy fabrication and low cost.
Description
This is suitable for novel a kind of electric motor protective device that relates to, and particularly a kind of multi-functional electric motor protecting device is applicable to the protection of the single-phase or three phase electric machine of all size power.
The prior motor protective device; kind is more; as open phase protection; overcurrent protection; under-voltage protection; overload protection etc.; its protection device has fusible link; thermal relay; open phase protector; air switch etc.; majority all is according to phase shortage; short circuit and cause that motor surpasses rated current; make the protection component action not reach the purpose of protection motor; but to from otherwise reason; too high as ambient temperature; ventilation is obstructed; under-voltage operation; Fraquent start; reasons such as load variations is big cause that the motor feels hot; temperature rise is too high; then do not have the effect of protection motor; and electric motor protective device price commonly used at present is more expensive, and structure is complicated; maintenance is difficulty.
The purpose of this utility model is to provide a kind of multi-functional electric motor protective device; this device is too high because of stall, the phase failure, overload, Fraquent start, under-voltage operation, environment temperature rise to motor, ventilate be obstructed, the load variations motor temperature that causes that greatly, seriously makes moist surpasses when allowing limit of temperature rise; cut off the electricity supply the protection motor.
This is suitable for novel implementation; three thermistors of one or series connection are close to monophase machine or three-phase motor stator winding appropriate location behind respectively; when motor causes that because of above-mentioned certain or multiple reason electric machine temperature rise surpasses the quick resistance of rating number pyrogenicity and drops to rated range when following; destroy the balance of bridge for measuring temperature; make triode (7) conducting; and triode (8) ends; the base stage of triode (12) can not get current cut-off; the collector voltage of triode (12) is zero; relay (13) dead electricity and discharging; relay normally open contact (14) separates; still be in normally open; the magnetic coil of A.C. contactor (15) is dead electricity and discharging simultaneously, and the machine of sending a telegraph is out of service, reaches the purpose of protection motor.
Be described in detail below in conjunction with drawings and Examples.
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is a control motor winding diagram of the present utility model.
With reference to Fig. 1, the utility model is by miniature toggle switch (1), duplex self-lock switch (2) transformer (3), bridge rectifier (4), electrochemical capacitor (5), resistance (6), triode (7,8,12), thermistor (9,10,11), relay (13) relay normally open contact (14), A.C. contactor magnetic coil compositions such as (15).This device adopts miniature toggle switch (1) to make its mains switch, makes the mains switch miniaturization, and saves cost.Transformer (3) input/output terminal is provided with a duplex self-lock switch (2), and it both had been applicable to the three phase electric machine of 380V, or is suitable for the monophase machine of 220V.AC power is after bridge rectifier (4) rectification; by electrochemical capacitor (5) and resistance (6) filtering; make the bridge for measuring temperature circuit obtain dc power supply stably; three thermistors of one or series connection are close to monophase machine or three-phase motor stator winding appropriate location behind respectively; when making electric machine temperature rise surpass rating number from any reason; then the thermistor resistance is reduced to below the rating number; destroy electric bridge (4) balance; make triode (7) conducting; triode (8) ends; the base stage of triode (12) can not get electric current and ends; its collector voltage is zero, relay (13) dead electricity and discharging, and normally open contact (14) separates; motor shuts down, and reaches the protection purpose.
The utility model has following advantage:
1, with miniature toggle switch for press button, reach microminiaturized and control big electric current (several peaces to tens peaces even bigger) with little electric current (several milliamperes).
2, the duplex self-lock switch of being located at the transformer output makes the utility model be applicable to the electric motor protecting of one camera and three-phase.
3, the suitable power of motor scope of the utility model is big, both has been applicable to the motor that 100KW is following, is applicable to the motor that 100KW is above again, has overcome the loaded down with trivial details selection of existing 1A, 5A, 10A, 30A60A etc.
4, its sensitivity the best, because thermistor (temperature) sensor is close to motor stator winding, the transmission of hotness signal is rapid, temperature rise surpasses 0.1 ℃ of rating number just can cause the electric motor protecting action, and does not make ageing of insulation.
5, draw materials easily, circuit is simple, and is cheap.Except that triode was certified products, other materials did not have specific (special) requirements, and is commercially available a lot of, and having first chinesization person to learn January will make.Cost is lower than 10 yuan.Volume and weight is less than 1/10th of other protection dresses.
Claims (3)
1, a kind of electric motor protective device; particularly a kind of multi-functional electric motor protective device; it is made up of miniature toggle switch [1], duplex self-lock switch [2], transformer [3], bridge rectifier [4], electrochemical capacitor [5], resistance [6], triode [7,8,12], thermistor [9,10,11], relay [13], relay normally open contact [14], A.C. contactor magnetic coil [15], it is characterized in that the thermistor [9,10,11] of one or three series connection is close to single-phase respectively or three-phase motor stator winding appropriate location behind.
2, according to the described electric motor protective device of claim 1, it is characterized in that miniature toggle switch (1) is its mains switch, replace push-button switch.
3,, it is characterized in that being equipped with on the transformer (3) a duplex self-lock switch (2) according to the electric motor protective device of claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207960 CN86207960U (en) | 1986-10-16 | 1986-10-16 | Multifunctional electric motor-protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207960 CN86207960U (en) | 1986-10-16 | 1986-10-16 | Multifunctional electric motor-protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86207960U true CN86207960U (en) | 1987-07-15 |
Family
ID=4810272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86207960 Withdrawn CN86207960U (en) | 1986-10-16 | 1986-10-16 | Multifunctional electric motor-protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86207960U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200872A (en) * | 2015-10-14 | 2015-12-30 | 安阳市安振高新产业有限责任公司 | Electric tamping pickaxe with multiple protection functions |
| CN109524943A (en) * | 2018-11-28 | 2019-03-26 | 吴江绿控电控科技有限公司 | A kind of hardware protection circuit with self-locking function |
-
1986
- 1986-10-16 CN CN 86207960 patent/CN86207960U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200872A (en) * | 2015-10-14 | 2015-12-30 | 安阳市安振高新产业有限责任公司 | Electric tamping pickaxe with multiple protection functions |
| CN109524943A (en) * | 2018-11-28 | 2019-03-26 | 吴江绿控电控科技有限公司 | A kind of hardware protection circuit with self-locking function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |