CN214256054U - Self-protection type temperature control motor - Google Patents

Abstract

The utility model belongs to the technical field of the motor, a self preservation protects type control by temperature change motor is provided, including motor and temperature control element, the motor includes bearing, front end housing, line box, stator, rotor, rear end cap, fan and fan housing, temperature control element sets up at stator winding tip, temperature control element is provided with first and outlet wire head two, first with outlet wire head two extends to in the line box, first with outlet wire head two is established ties and is connect control loop control coil front end. The motor can be widely applied to the use environment which is likely to generate temporary overload, the good working state of the motor can be ensured, the service life of the motor is prolonged, and the loss of users is reduced. And good economic benefit and social benefit are obtained.

Description

Self-protection type temperature control motor

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to self preservation protects type control by temperature change motor.

Background

When the industrial equipment is used in the motor, temporary overload is possibly generated due to equipment processing materials, once the overload exceeds the overload capacity of the motor, the motor can rapidly heat and rapidly heat up, so that the motor damages a stator winding due to overload, and the function of the motor is lost; the phase loss and overload faults of the three-phase asynchronous motor account for more than 80 percent of the total number of the faults, and are all the reasons for use by users, thereby causing great loss to the users. The existing system for controlling the damage of the motor is expensive, is mainly used in important occasions and cannot be accepted by general users. Therefore, a motor product which can effectively prevent the motor from being burnt due to overload and open-phase operation and has relatively low cost is urgently needed.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a self-protection temperature-controlled motor, which can effectively solve the problems of the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a self-protected temperature controlled motor comprising: the motor comprises a bearing, a front end cover, a wire box, a stator, a rotor, a rear end cover, a fan and a fan cover, wherein the temperature control element is arranged at the end part of a stator winding wire, the temperature control element is provided with a first wire outlet head and a second wire outlet head, the first wire outlet head and the second wire outlet head extend to the inside of the wire box, and the first wire outlet head and the second wire outlet head are connected in series at the front end of a control loop control coil.

Preferably, the motors are respectively and linearly connected to the three phase lines, and the contactors and the fuses are sequentially arranged between the motors and the three phase lines.

Preferably, the temperature control element is a quick-acting insulating high-heat-conductivity temperature control element.

Preferably, the stator and the rotor are arranged in the middle of the motor, the wire box is arranged on the upper portion of the motor, the fan is arranged on the right side of the rear end cover, and the fan cover is arranged on the right side of the fan.

Compared with the prior art, the utility model discloses following beneficial effect has:

the temperature control element is added to the stator winding and is connected with a main power supply of the motor controller, and once the temperature of the stator winding of the motor exceeds a set value, the temperature control element is immediately disconnected, so that the main power supply is cut off, and the purpose of protecting the motor is achieved. The motor can be widely applied to the use environment which is likely to generate temporary overload, the good working state of the motor can be ensured, the service life of the motor is prolonged, and the loss of users is reduced. And good economic benefit and social benefit are obtained.

Drawings

Fig. 1 is a schematic view of the overall structure of a self-protection temperature-controlled motor according to the present invention;

fig. 2 is a right side view of a self-protection type temperature controlled motor according to the present invention;

fig. 3 is a wiring diagram of a temperature control element of a self-protection temperature control motor according to the present invention;

fig. 4 is a wiring diagram of the self-protection temperature-controlled motor of the present invention;

fig. 5 is a flow chart of the self-protection temperature-controlled motor of the present invention.

In the figure: 1. a bearing; 2. a front end cover; 3. a temperature control element; 4. a wire box; 5. a stator; 6. a rotor; 7. A rear end cap; 8. a fan; 9. a fan housing; m, a motor; t1, a first wire outlet; t2, outlet two.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that this description is intended to be exemplary, and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-5, the present invention provides a self-protection temperature-controlled motor, comprising:

motor M and temperature control element 3, the motor includes bearing 1, front end housing 2, line box 4, stator 5, rotor 6, rear end housing 7, fan 8 and fan housing 9, temperature control element 3 sets up stator 5 wire winding end, temperature control element 3 is provided with first T1 and two T2 of outlet wire head, first T1 of outlet wire head with two T2 of outlet wire head extend to in the line box 4, first T1 of outlet wire head with two T2 series-connection of outlet wire head are at control circuit control coil front end.

Preferably, the motor M is respectively linearly connected to three phase lines, and a contactor and a fuse are sequentially arranged between the motor M and the three phase lines.

Preferably, the temperature control element 3 is a quick-acting insulating high-thermal conductivity temperature control element.

Preferably, the stator 5 and the rotor 6 are disposed in the middle of the motor M, the wire box 4 is disposed on the upper portion of the motor M, the fan 8 is disposed on the right side of the rear end cover 7, and the fan cover 9 is disposed on the right side of the fan 8.

In use, as shown in connection with figures 1-5,

a temperature control element 3 is added on a winding of a stator 5 of the motor M, a main power supply of a controller of the motor M is connected through the temperature control element 3, once the temperature of the winding of the stator 5 of the motor M exceeds a set value, the temperature control element 3 is immediately disconnected, and therefore a main circuit power supply is cut off, and the purpose of protecting the motor M is achieved.

The control loop of the motor M is controlled by the control element by selecting a quick-response control element and utilizing the characteristic that the temperature of the motor winding is quickly raised in the phase-lacking fault and overload fault of the motor M through reasonable type selection, the power supply of the control loop of the motor is cut off at a certain temperature before the temperature of the winding of the motor M is raised to the burnout temperature, so that the motor M is powered off, the switch of the temperature control element 3 is not recovered to control the loop to be not switched on before the temperature of the winding of the motor M is lowered to the reasonable temperature, the motor M cannot be started, and the switch of the temperature control element 3 is recovered to control the loop to be unblocked only after the temperature of the winding of the motor M is lowered to the reasonable temperature, so that the motor can be started normally.

The three-phase motor is called as phase-missing if it lacks a live wire for various reasons, when a certain phase fuse wire of the triangular connection motor is broken, the three-phase stator winding is divided into two paths, one path has only one phase winding, and the current in the loop of only one phase winding is greatly increased compared with that in the three-phase operation, so that the phase winding is inevitably burnt out firstly. The star-connected motor has one phase with power failure, the other two phase windings connected serially and 380V applied voltage, and each phase winding has voltage lowered from 220V to 190V, so that if the load power of the motor is unchanged, the current in the stator windings exceeds the normal value and is 1.732 times higher than the rated current in the default phase operation.

Motor overload means that the motor has a fixed running power, called rated power, and the unit is watt (W) or kilowatt (kW), if the actual power of the motor exceeds the rated power of the motor under certain conditions, the phenomenon is called motor overload. Because the load torque is larger than the rated torque of the motor, the motor increases the rotor current to improve the electromagnetic torque, so that the newly increased torque and the load rotating cabinet reach new balance to continue running, the rotor current is increased to cause the increase of the stator current, the copper consumption of the motor is increased, the motor generates heat due to the increase of the loss, the insulation is aged for a long time, and even the motor is burnt.

The self-protection type temperature control motor implementation process comprises the following steps:

1. temperature control element selection

Safety: an insulating shell is selected for use, and the insulating motor meets related requirements, so that accidents are prevented.

Reliability: the control precision of the temperature control element is reasonably selected, and reliable control is guaranteed.

Sensitivity: the quick-acting temperature control element and the heat-conducting glue with high heat conductivity coefficient are selected to ensure quick temperature transmission and sensitive action.

2. Temperature control element mounting

According to the technological requirements, the temperature control element 3 is arranged at the end part of the winding of the motor M.

3. Self-protection temperature-controlled motor assembly

4. Self-protection temperature control motor on-load operation

5. Self-protection temperature control motor overload and open-phase fault

When the winding temperature rises and the power is not timely cut off to remove the fault, the motor M has the tendency of burning.

6. The temperature control element 3 detects the winding temperature and judges whether to recover the control loop power supply.

7. When the winding temperature rises, the temperature control element 3 detects the winding temperature, the power supply of the control loop is cut off, and the motor M is powered off.

8. And (5) powering off the motor M and removing the fault.

9. The control loop power supply is recovered, and the motor can be started normally.

Self-protection temperature-controlled motor usage description:

first, the service conditions of the motor

1. The maximum temperature of the ambient air varies with the season, but does not exceed 40 ℃. The minimum temperature of the ambient air is-15 ℃.

2. The average maximum relative humidity in the wettest month is 90%, while the average minimum temperature in the month is not higher than 25 ℃.

3. The altitude does not exceed 1000 m.

The rated voltage is 380V and the rated frequency is 50 Hz.

Second, inspection before use of the motor:

1. the motor nameplate data should be carefully checked before use to confirm that the motor used is

Whether the service requirement is met.

2. Checking whether the motor structural part is damaged or not, whether the fastening part is loosened or falls off or not,

whether the shaft is flexible. If the problem exists, a professional electrician is required to be treated, or a telephone call of the company is called for consultation and resolution.

3. When the motor is newly installed or is stopped for a long time, 500V megameters are required before the power transmission is started

The ohmmeter measures the insulation resistance of the motor winding to the case, and the insulation resistance is greater than 0.38M omega; if the insulation resistance is less than 0.38M omega, the motor should be dried.

4. Water cannot enter the motor, otherwise, the motor needs to be dried and replaced

And a bearing. The stator winding temperature should be gradually increased during the drying process and should not exceed 120 ℃.

Claims (4)

1. The utility model provides a self preservation protects type temperature control motor, its characterized in that, includes motor (M) and temperature control element (3), the motor includes bearing (1), front end housing (2), line box (4), stator (5), rotor (6), rear end cap (7), fan (8) and fan housing (9), temperature control element (3) set up stator (5) wire winding end, temperature control element (3) are provided with first (T1) and two (T2) of being qualified for the next round of competitions, first (T1) of being qualified for the next round of competitions with two (T2) of being qualified for the next round of competitions extend to in line box (4), first (T1) of being qualified for the next round of competitions with two (T2) of being qualified for the next round of competitions connect in control loop control coil front end.

2. A self-protection type temperature controlled motor according to claim 1, wherein the motor (M) is linearly connected to three phase lines, and a contactor and a fuse are sequentially provided between the motor (M) and the three phase lines.

3. A self-protected temperature controlled electric motor according to claim 1, wherein the temperature controlled element (3) is a snap-action insulating high thermal conductivity temperature controlled element.

4. A self-protected temperature controlled electric motor according to claim 1, wherein the stator (5) and the rotor (6) are arranged in the middle of the electric motor (M), the wire box (4) is arranged in the upper part of the electric motor (M), the fan (8) is arranged on the right side of the rear end cover (7), and the fan housing (9) is arranged on the right side of the fan (8).

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