CN2492967Y - Motor overload protection signal sampler - Google Patents
Motor overload protection signal sampler Download PDFInfo
- Publication number
- CN2492967Y CN2492967Y CN 01252837 CN01252837U CN2492967Y CN 2492967 Y CN2492967 Y CN 2492967Y CN 01252837 CN01252837 CN 01252837 CN 01252837 U CN01252837 U CN 01252837U CN 2492967 Y CN2492967 Y CN 2492967Y
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- CN
- China
- Prior art keywords
- motor
- relay
- main winding
- overload
- alternating current
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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.)
- Expired - Fee Related
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- Control Of Ac Motors In General (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The utility model relates to a motor overload protection signal sampling device, which includes a fan motor as well as an alternating current relay. In the fan motor, a main winding is cascaded with a secondary winding, the open end of the main winding is connected with an overload protector, and a capacitor (C) is connected between the main winding and the secondary winding. One end of the control coil of the alternating current relay is connected with the joint at which the overload protector is connected with the main winding of the fan motor, the other end is connected with the joint at which the main and secondary windings of the fan motor are connected, and therefore the control coil of the alternating current relay and a power supply form a loop via the overload protector built in the fan motor; the contacts of both ends of the alternating current relay are respectively connected with power supplies of both high-potential signals and low-potential signals, and an outer contact is connected with the control device of an air-conditioner. The utility model does not need to alter the structure of an original motor and only adds the alternating current relay and the connecting wires of electrical apparatuses, and the sampling control function on the operational state of the motor can be fulfilled by utilizing the working characteristic of the relay, thus guaranteeing the operation of a compressor under the normal working condition of an air-conditioning system.
Description
Technical field
The utility model relates to a kind of signal sampling device, relate in particular to a kind of be used to adopt single-phase, three phase electric machine drags, load the motor overload guard signal sampler of the overload protection sample of signal of the equipment of heat radiation or products such as household electrical appliance such as air-conditioning, fan electromotor.
Background technology
At present, the prior art domestic air conditioner is equipped with the overcurrent protection device in its fan electromotor inside, outside, yet overload protection generally is used for motor self.As shown in Figure 1, this is the motor wiring schematic diagram, and among the figure, the main winding 11 of motor 10 is connected with auxiliary winding 12, and described overload protective device 13 is connected the other end place of fan electromotor 10 main windings 11.In case fan electromotor 10 overloads, its overload protective device 13 is just immediately with the dump of this motor 10, and still, air-conditioning system power set (comprising compressor etc.) are energized still, continues operation.Shut down under the condition of promptly not having heat radiation at this fan electromotor 10, compressor is if continue to move, until system reach a high temperature, the limit of high pressure, control device just sends guard signal, and compressor is shut down.This shows; prior art overcurrent protection device only cuts off fan electromotor 10 power supplys when fan electromotor transships, do not provide useful signal to control device; and fail to cut off the power supply of air-conditioning system power set, therefore the normal operation of compressor is not played the effect of protection.
Summary of the invention
The purpose of this utility model is to provide a kind of improved motor overload guard signal sampler; it can offer this overload the control assembly of air-conditioning immediately when the fan electromotor overload protection; allow control assembly take the precautionary measures in advance, thereby ensure that other vitals of air conditioner carry out work under normal operation.
The purpose of this utility model is achieved in that
A kind of motor overload guard signal sampler comprises: a fan electromotor, and at motor internal, main winding and auxiliary winding are connected in series, and connect at the free end of main winding an overload protective device is set; Outside motor, a capacitor C is set, main winding after it is connected across and is connected in series and auxiliary winding two ends; Be characterized in also comprising: an AC relay, one end of this AC relay control coil is connected overload protective device and motor main winding connected node place, its other end is connected the connected node place of motor main winding and auxiliary winding, forms overload protective device and the power supply formation loop of AC relay control coil by electric machine built-in; Wherein two terminal contacts of described AC relay are connected with the signal power source of high level 5V DC power supply and low level 0V respectively, and another external contact is connected with air conditioner controlling device.
The utility model motor overload guard signal sampler makes it compared with prior art owing to adopted above-mentioned technical scheme, has following advantage and good effect:
1. the utility model is owing to take out the motor overload guard signal from the fan electromotor of existing split-type air conditioner device outside, provide the blower fan current state with this signal to air conditioner controlling device, make air-conditioning system reach a high temperature, the high-pressure stage limit value effectively protected control to each project in the past, therefore can ensure that compressor moves under system's normal condition;
2. the utility model reflects whether overload protection of operating motor sensitively because the major part of sampler is the adhesive by the AC relay contact or discharge, then provide the motor current state to control device, in case therefore blower fan transships, AC relay notifies control section according to the operation of air conditioner pattern at once, in advance vitals such as compressor are protected, so operation is very reliable;
3. the utility model is not owing to change original electric machine structure, use existing motor internal device and lead-in wire, increase exchanges relay and electrical appliance connecting wire, utilize the relay work characteristics can finish sampling controlled function to motoring, and this AC relay is a general part, therefore, it is not only cheap and simple in structure, and reliable.
Description of drawings
To the description of an embodiment of the present utility model, can further understand the purpose of this utility model, specific structural features and advantage by following in conjunction with its accompanying drawing.Wherein, accompanying drawing is:
Fig. 1 is the connection diagram of prior art motor and overcurrent protection device;
Fig. 2 is the electrical schematic diagram according to the motor overload guard signal sampler that the utility model proposes.
Embodiment
As shown in Figure 2, this is the electrical schematic diagram of the utility model motor overload guard signal sampler.The utility model motor overload guard signal sampler; be used to adopt single-phase, three phase electric machine drags, load the equipment or the household electrical appliance of heat radiation; when transshipping in particular for domestic air conditioner outside fan electromotor; by this overload signal, ensure that air conditioner and other vitals carry out work under normal operation.
The utility model motor overload guard signal sampler comprises: a fan electromotor 10, and in motor 10 inside, main winding 11 is connected in series with auxiliary winding 12, at the free end of main winding 11 overload protective device 13 is set; At the motor 10 outside capacitor C that connect, main winding 11 and auxiliary winding 12 two ends after this capacitor C is connected across and is connected in series.Unlike the prior art be also to comprise: an AC relay 20; One end of these AC relay 20 control coils 21 is connected overload protective device 13 and motor 10 main windings 11 connected node places, its other end is connected the connected node place of motor 10 main windings 11 and auxiliary winding 12, forms AC relay 20 control coils 21 and constitutes the loop by motor 10 built-in overload protective devices 13 with power supplys; Two terminal contacts 22,23 of AC relay 20 are connected with power supply, and external contact 24 is connected with air conditioner controlling device.
The utility model motor overload guard signal sampler is work like this:
When fan electromotor 10 runs well, 20 liang of terminal contacts 22 of AC relay and 24 adhesives, it is normal that external contact 24 offers air conditioner controlling device explanation motor status;
When fan electromotor 10 overloads; when motor 10 built-in overload protective devices 13 disconnect motor 10 power supplys; also AC relay 20 control coils 21 loops are disconnected; 20 liang of terminal contacts 22 of AC relay and 24 are discharged; contact 22 and 24 disconnection; make external contact 24 the outer signal apparatus for controlling of supply can't be illustrated motor 10 abnormal states thus.
As from the foregoing, the utility model motor overload guard signal sampler is by being provided with an AC relay 20, being connected across the control coil 21 at overload protective device 13 and major-minor winding 11 and 12 connected node places can be easily detect the running status of outside fan electromotor, once fan electromotor overload, sampler just can be caught this overload signal immediately, and notice control assembly control compressor stall, wait for the fan electromotor load restoration, restart compressor operation, air-conditioning system is resumed work; If the impaired open circuit of fan electromotor, sampler is caught this open circuit signaling equally immediately, and by control assembly warning device is reported to the police.
In sum, the utility model motor overload guard signal sampler, provide the blower fan current state owing to from the fan electromotor of existing split-type air conditioner device outside, take out the motor overload guard signal to air conditioner controlling device, therefore can ensure that compressor moves under air-conditioning system operating mode normal condition; Simultaneously, because being the adhesive by the AC relay contact or discharge, major part reflects whether overload protection of operating motor sensitively, so operation is very reliable; In addition, owing to do not change original electric machine structure, only increase exchanges relay and electrical appliance connecting wire, utilize the relay work characteristics can finish sampling controlled function to motoring, therefore, not only cheap and simple in structure, and have good practicability, economy; Move thereby make the utility model can avoid compressor to be under high temperature, the high pressure critical condition, ensure that really compressor carries out work under system's normal condition.
Claims (1)
1. motor overload guard signal sampler comprises:
One fan electromotor (10), in motor (10) inside, main winding (11) and auxiliary winding (12) are connected in series, and connect at the free end of main winding (11) overload protective device (13) is set; Outside motor (10), a capacitor C is set, main winding (11) after it is connected across and is connected in series and auxiliary winding (12) two ends;
It is characterized in that also comprising: an AC relay (20);
One end of this AC relay (20) control coil (21) is connected overload protective device (13) and motor (10) main winding (11) connected node place, its other end is connected the connected node place of motor (10) main winding (11) and auxiliary winding (12), forms AC relay (20) control coil (21) and constitutes the loop by the built-in overload protective device (13) of motor (10) with power supply;
Wherein two terminal contacts (22) of described AC relay (20) are connected with the signal power source of high level 5V DC power supply and low level 0V respectively with (23), and another external contact (24) is connected with the high level air conditioner controlling device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252837 CN2492967Y (en) | 2001-08-01 | 2001-08-01 | Motor overload protection signal sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252837 CN2492967Y (en) | 2001-08-01 | 2001-08-01 | Motor overload protection signal sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2492967Y true CN2492967Y (en) | 2002-05-22 |
Family
ID=33662442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01252837 Expired - Fee Related CN2492967Y (en) | 2001-08-01 | 2001-08-01 | Motor overload protection signal sampler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2492967Y (en) |
-
2001
- 2001-08-01 CN CN 01252837 patent/CN2492967Y/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020522 Termination date: 20090901 |