CN2349602Y - Motor temp. controller - Google Patents

Abstract

The utility model discloses a motor temperature controller, mainly comprises a power supply 1, a regulator 2, a relay 3 and a sensor 4. The utility model is characterized in that a temperature sensor 4 is arranged in a mounting hole 7 which is as deep as a stator silicon steel sheet 6 on a shell 5 of a measured motor. The utility model has the advantage that no matter the motor fever caused by what reason, the temperature can be checked by the temperature sensor, and the utility model can alarm and cut off the power supply when the temperature exceeds preset temperature. Therefore, the utility model can effectively protect the motor from being burnt caused by overheating and other accidents.

Description

A kind of motor temperature control device

The utility model relates to the automaton of motor, particularly a kind of temperature control equipment of motor.

In use often because overcurrent, overload, reasons such as the phase failure, mechanical fault raise its temperature in operational process to motor in the prior art, overstep the extreme limit and are burnt.For this reason, having designed automatic protection circuit and devices such as many overcurrents, overload, the phase failure, because a variety of causes, often is that motor has been burnt, and controller just works or owing to the change of the current/voltage of short time causes misoperation.Substantially can not reach the purpose of automatic control and protection.Therefore the purpose of this utility model has been proposed.

The purpose of this utility model provides a kind of motor temperature control device; from the burn-down of electric motor no matter which kind of reason causes; all be that rising owing to temperature oversteps the extreme limit and causes; this point is started with; variation of temperature with motor internal is a major parameter; by certain circuit and facility, realize protection automatically and the purpose of reporting to the police.

The purpose of this utility model realizes according to structure described below, this motor temperature control device, this device mainly comprises power supply 1, modulator 2, relay 3, sensor 4 is characterized in that in by the mounting hole that reaches stator siliconized plate 6 deeply 7 on the housing 5 of measured motor temperature sensor 4 being set.Temperature sensor adopts thermistor, and highly sensitive, cost is lower.

The interference free performance that the utility model has the advantages that control device is better, only is elevated to setting value in temperature, just reports to the police and cuts off the electricity supply automatically, protects automatically.Thereby protect heating value of overstepping the extreme limit that motor do not cause by any reason effectively and burning and fault of causing.The device of this control temperature need can also be applied to temperature control, and control accuracy require the not to be strict workplace of (as ± 1 ℃), need control the occasion of temperature as water heater, shower and other mechanical part or electrical equipment.

The following drawings explanation, accompanying drawing 1 is the scheme of installation of temperature sensor of the present utility model in the housing of motor.Accompanying drawing 2 is electrical principle sketches of the present utility model, and accompanying drawing 3 is wiring sketches of the present utility model, and accompanying drawing 4 is electrical principle block schemes.Each sequence number in the accompanying drawings is denoted as: 1, power supply, 2, controller, 3, relay, 4, sensor, 5, housing, 6, siliconized plate, 7, mounting hole.

Describe structure of the present utility model and use in detail below in conjunction with the embodiment in the accompanying drawing.With reference to accompanying drawing, this motor temperature control device, its electrical principle block scheme is illustrated by accompanying drawing 4, mainly comprises 220 or 380 volts of power supplys, modulator, relay, controlled electric appliance, temperature sensor constitutes the loop.Its electrical schematic diagram is shown in Figure 2, there is shown an electrical schematic diagram by the temperature control equipment of the motor of three-phase supply power supply, and the Rt among the figure is a temperature sensor.Accompanying drawing 1 is the mounting structure figure of temperature sensor 4 of the present utility model in the housing of motor, on the housing 5 of motor, bore one group of mounting hole 7, the degree of depth in hole is to be advisable near the surface of stator siliconized plate 6, micro-machine can be only with a hole mounting temperature sensor 4, and medium-and-large-sized motor can adopt 2-4 mounting hole symmetry to install.A temperature sensor is directly connected in the modulator loop and gets final product, and is when 2-4 temperature sensor uses simultaneously, relatively good to be connected in series.Wiring situation when three temperature sensors are installed simultaneously has been shown in the accompanying drawing 1, when the position of any one sensor the unusual intensification of temperature occurs and reaches setting value in the use, this variation of temperature controlled device 2 receives, trigger the controllable silicon conducting, UNICOM's relay 3 is dump, and the temperature that has prevented motor further rises and the burn-down of electric motor that causes.Temperature sensor 4 adopts thermistor, according to the family curve of thermistor, selects suitable temperature range, for example sets a temperature range from 40 ℃-90 ℃ temperature range every 5 ℃ and adjusts, and makes it satisfy the needs of different electrical equipment control.Temperature control equipment of the present utility model also can be used for the temperature alarming control of the bearing of running device, promptly in the temperature survey hole of bearing or bearing shell, install device of the present utility model, when its overtemperature, send alerting signal, so that take measures, prevent that bearing from burning because of temperature overheating.Accompanying drawing 3 is physical cabling diagrams of a line bank of the present utility model.3. and 6. 9. 10. binding post connects temperature sensor, and 2. 3. binding post connects power supply, and binding post is at a contact of inside serial connection relay.What need explanation a bit is, when the working sensor of this device is in liquid or Korrosionsmedium, tight encapsulation process should be carried out in hole 7, to prevent insulation damages or to cause equipment corrosion and influence use.Fault auxiliary diagnosis when below explanation is used to control motor for submerged pump, when device action of the present utility model, when submersible pump stops, cut off the electricity supply, the wiring of sensor (as 9. or 10. disconnecting in the accompanying drawing 3, is surveyed its resistance value, as being normal greater than 1.5K Ω, as being lead short circuit less than 1.5K Ω, greater than 2K Ω for opening circuit or loose contact.The direct current resistance of measuring motor three phase windings then should be in a basic balance, otherwise be the fault of weak point between line, section road or winding.Measure power circuit (comprising motor) insulation, should be within normal, otherwise be due to the defective insulation.If above inspection is all normal, can send electricity once more, if treat repetitive operation after three minutes, then be judged as mechanical fault.

Claims (2)

1, a kind of motor temperature control device, this device mainly comprises power supply (1) modulator (2), relay (3), sensor (4) is characterized in that in by the mounting hole that reaches stator siliconized plate (6) deeply (7) on the housing of measured motor (5) temperature sensor (4) being set.

2,, it is characterized in that described temperature sensor is a thermistor according to the said motor temperature control device of claim 1.

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