KR100746208B1 - Bildish motor unit for electric motor with water cooling system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a BLDC motor device used as an electric motor for industrial equipment, home appliances, transportation equipment, and the like, and more particularly, to a water having an internal space outside the housing of the control unit for controlling the BIDL motor Each jacket is formed on the surface of the housing, and a temperature sensor is mounted on the surface of each of the housings, and the water jacket of the BCD motor and the control unit is connected to a separate radiator and a pump, so that the pump automatically operates when the temperature sensor is overheated. By making it work,

The coolant cooled to room temperature by the radiator's heat dissipation quickly cools the housing of the Bieldish motor and control unit, preventing power degradation and malfunction due to overheating, while allowing reasonable operation even under maximum power and overload. It is a Bieldi motor apparatus for an electric motor having a water-cooled cooling system which can prevent the damage of the load and damage to other circuits and thereby greatly extend the service life of the Bieldi motor and its control unit.

Description

BLDC motor apparatus with water cooling system for electric motor with water cooling system

1 is a general connection diagram of an electric motor to which the Bieldi motor apparatus is applied

Figure 2 is an overall connection diagram of the Bildish motor apparatus according to the present invention

Figure 3 is a cross-sectional view showing a water jacket of the Bildish motor apparatus according to the present invention

Figure 4 is a schematic diagram of the state in which the cooling water is supplied to the motor and the control unit of the Bildish motor apparatus according to the present invention

5 is a schematic diagram of a state in which cooling water is supplied to a motor of a Bildish motor apparatus according to the present invention;

6 is a schematic view of a state in which cooling water is supplied to the control unit of the Bildish motor apparatus according to the present invention;

Explanation of symbols on the main parts of the drawings

1: supply pipe 2: inlet pipe

3: radiator 4: pump

5,5 ': Supply branch pipe 6,6': Inlet branch pipe

7: 1st three-way selector valve 8: 2nd three-way selector valve

10: Bildish Motor 11: Motor Housing

12: motor water jacket 13: motor temperature sensor

20: control unit 21: unit housing

22: unit water jacket 23: unit temperature sensor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a BLDC motor device used as an electric motor for industrial equipment, home appliances, transportation equipment, and the like. In particular, a water jacket is formed outside the housing of the motor and the control unit of the BLD device. The jacket is connected to the radiator and the pump so that when the overheating condition of the BCD motor and the control unit is detected by the temperature sensor, the pump starts to automatically circulate the coolant, thereby rapidly cooling the overheated motor and the control unit. The present invention relates to a Bildish motor device for an electric motor having a water-cooled cooling system that enables the increase of its driving efficiency and smooth circuit operation.

In general, BLDC motors do not have mechanical contacts such as a DC motor with a brush, so noise does not occur and the service life is long. It is widely used as an electric motor for home appliances, as well as for transportation equipment, and removes brushes and commutators from ordinary DC motors and replaces them with electronic commutation mechanisms. Various speeds from low speed to high speed as well as mechanical or electrical noise are reduced. The motor can be controlled as a brushless DC motor (brushless direct currency motor).

In particular, in recent years, it has been applied to two-wheeled vehicles and electric wheelchairs, including hybrid cars or scooters, and the use range is gradually increasing.

Such a Bildish motor includes a rotor for forming a field and transmitting torque to the outside; Armature coils that generate torque by interaction with the field; A stator core for fixing the armature coil and simultaneously forming a magnetic path; And a position detecting element for detecting the position of the rotor.

In this case, the rotor may include a rotor core formed by stacking a plurality of steel plates having a disc shape; A magnet separated into a plurality and coupled to radially contact the circumferential surface of the rotor core; It has a rotating shaft that is rotatably coupled to the shaft core of the rotor core,

The stator core is manufactured by laminating a silicon steel sheet of at least 1 mm or less by punching it with a press, and the laminated stator core is formed of a plurality of poles integrally formed to protrude on the yoke having a cylindrical shape and the inner circumferential surface of the yoke. It consists of.

At this time, the stator core has a coil wound in an insulating state in a slot formed between a single pole and another pole adjacent thereto. When the current is applied to the coils wound around the poles of the stator, the poles sequentially have the alternating polarity of the N pole and the S pole, which is generated by the magnetic force between the pole of the stator and the magnet of the rotor. The magnetic force of the attraction force and the repulsive force acts in the tangential direction of the stator core so that the rotor rotates.

In particular, the non-ELD motor is inevitably used in connection with a control unit for controlling the driving of the non-ELD motor, and the inside of the control unit is an overall inverter and a non-ELD motor for converting DC power into AC power. A control circuit unit for controlling and a plurality of power switching elements are built in. The inverter generates a large amount of heat during the switching operation, and since its component material is a semiconductor element, there is a possibility of malfunction due to heat. The possibility of the same is true for the control circuit described above.

Therefore, the control unit including the inverter as described above is to constantly cool it during operation, the conventional control unit cooling structure of the housing is made of an aluminum case with excellent heat dissipation, while the outer surface of the housing It is produced by integrally forming the cooling fins of the radial or repeating arrangement.

However, the above-mentioned non-ELD motors generate high heat due to overload during excessive continuous operation and operation under load conditions. The high-temperature heating state of such non-ELD motors greatly reduces the efficiency of the non-ELD motors, but has a long service life. It is the cause of shortening.

As a result, the housing of a general BLD motor is made of aluminum having excellent heat dissipation, and a radial or repetitive heat dissipation fin is formed on the outer surface of the housing. Conventional cooling method has a disadvantage that can not reasonably cool the high heat of the overload state.

In particular, when using it in the summer or high temperature region, the high temperature according to the original climate further increases the heat generation of the Bieldish motor itself, so the air-cooled cooling structure still has a significant problem in the cooling efficiency, as well as the cooling rate. It is greatly behind and it is impossible to use rational energy as well as it is impossible to obtain a high-efficiency output state, which causes considerable difficulties in the operation of various devices.

In addition, the malfunction due to the load in the high temperature region and the summer as described above occurs in common in the well-known control unit, as described above, the inverter and the control circuit portion composed of semiconductor elements, etc. are more susceptible to high heat. As a result, it is obvious that prolonged use in a high temperature region or under load poses a considerable hazard to the durability of the control unit.

Furthermore, when the above-mentioned BLD motor is used as a power vehicle of a vehicle as shown in FIG. 1, the BDL motor 101 having the control unit 100 is provided with a differential gear through a transmission member 102 and a reduction gear 103. And the differential gear 104 is connected to the drive shaft 106 having the wheel 105, so that the rotational power is driven when the BLD motor 101 is driven. Since it is transmitted by the power to rotate the it is possible to implement the application to a variety of transportation through this.

At this time, the Bildish motor generates heat of about 30 ~ 40 ℃ in the normal condition, but the temperature is inevitably rises when the output is increased or the high speed maximum output while climbing up a steep hill, The internal temperature of these loads will rise to a maximum of 80 ° C, which will significantly shorten the life of the BLD motor and control unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and forms a water jacket having an inner space on the outside of the housing of the BCD motor and the control unit for controlling the motor, and a temperature sensor on the surface of the housing. Each of the water jacket of the Bieldi motor and the control unit is connected to a separate radiator and pump, so that the pump automatically operates when the temperature sensor is overheated.

The coolant cooled to room temperature by the radiator's heat dissipation quickly cools the housing of the Bieldish motor and control unit, preventing power degradation and malfunction due to overheating, while allowing reasonable operation even under maximum power and overload. SUMMARY OF THE INVENTION An object of the present invention is to provide a Bildish motor apparatus for an electric motor having a water-cooled cooling system, which can prevent load damage and damage to other circuits, thereby greatly extending the service life of the Bildish motor and its control unit. Is there.

Another object of the present invention is to mount a three-way switching valve on the supply pipe for supplying the cooling water from the pump to each of the Bieldi AC motor and the control unit, connecting the water jacket and the radiator of the Bieldi motor and the control unit By installing a three-way switching valve on the inlet pipe, the three-way switching valve is operated in conjunction with the individual response of the temperature sensor on the outer surface of the housing to supply and flow the cooling water in a concentrated or branched manner to maximize its cooling efficiency. It was made.

Hereinafter, preferred embodiments of the present invention will be described.

2 is an overall connection diagram of the Bildish motor apparatus according to the present invention, Figure 3 is a cross-sectional view showing a water jacket of the Bildish motor apparatus according to the present invention.

The constitution of the present invention is a motor water jacket, each of which is watertightly formed on the outer surface of the motor housing 11 of the Bildish motor 10 and the unit housing 21 of the control unit 20 for controlling the Bildish motor 10. 12 and the unit water jacket 22,

The motor water jacket 12 and the unit water jacket 22 are to be connected to the radiator 3 and the pump 4 through the supply pipe 1 and the inlet pipe 2, respectively,

On the other end of the supply pipe 1, one end of which is connected to the pump 4, a supply branch pipe 5, 5 'is connected to the inflow side of the motor water jacket 12 and the unit water jacket 22, respectively.

On the other end of the inlet pipe 2, one end of which is connected to the radiator 3, respectively, an inlet branch pipe 6, 6 'is connected to the discharge side of the motor water jacket 12 and the unit water jacket 22,

The pump 4 responds to the reaction of the motor temperature sensor 13 and the unit temperature sensor 23 mounted on the motor housing 11 of the BLD motor 10 and the unit housing 21 of the control unit 20. By driving along, the internal cooling water is circulated in the motor water jacket 12 and the unit water jacket 22 along the supply pipe 1 and the inlet pipe 2.

At this time, the first three-way switching valve (7) is attached to the connection portion of the supply pipe (1) and the supply branch pipe (5) (5 '), the inlet pipe (2) and the inlet pipe (6) ( 6 ') is provided with a second three-way selector valve 8 so that the first three-way selector valve 7 and the second three-way selector valve 8 are described above. ) To operate according to the reaction of the unit temperature sensor 23 may be configured to switch the opening and closing of the flow path to improve the cooling efficiency.

Referring to the accompanying drawings, the operation of the Bieldich motor apparatus for an electric motor having the water-cooled cooling system of the present invention having the above configuration will be described in detail as follows.

As shown in the figure, the Bildish motor apparatus for an electric motor according to the present invention is divided into a Bildish motor 10 and a control unit 20 for controlling the Bildish motor 10, which are practical power means. The motor 10 and the control unit 20 will generate considerable heat in an overload condition. Accordingly, in the present invention, the heat is quickly dissipated and removed so as not to interfere with the output and operability of the motor and the control unit.

That is, the motor housing 11 and the unit water jacket 22 having an inner space on the outer surface of the motor housing 11 and the unit housing 11 of the Bieldich motor 10 are respectively provided. Formed to allow the cooling water to circulate through the motor water jacket 12 and the unit water jacket 22,

The motor water jacket 12 and the unit water jacket 22 are connected to the supply pipe 1 and the inlet pipe 2, respectively, and the ends of the supply pipe 1 and the inlet pipe 2 are connected to each other. The radiator 3 and the pump 4 are connected.

In particular, when the coolant discharged through the pump 4 is moved through the supply pipe 1 at the end of the supply pipe 1, the cooling water is branched and supplied to the BCD motor 10 and the control unit 20, respectively. One supply branch pipe 5, 5 ′ is formed, and these supply branch pipes 5, 5 ′ are connected to the supply side of the motor water jacket 12 and the unit water jacket 22, respectively.

The inlet pipe (2) has an inlet branch pipe (6) for respectively recovering the cooling water discharged from the motor water jacket 12 of the Bildish motor 10 and the unit water jacket 22 of the control unit 20 ( 6 ') is formed so that the coolant flowing through it circulates inside the radiator 3 to be quickly cooled by the heat dissipation characteristics of the radiator 3.

In addition, the outer surface of the motor housing 11 and the unit housing 21 of the control unit 20 of the Bieldich motor 10, respectively, the motor temperature sensor 13 and the unit temperature sensor (for sensing the temperature) 23), these temperature sensors are to cause the above-mentioned pump (4) to operate when a temperature abnormality is set in the circuit.

Accordingly, when the internal temperature rises due to the load state of the Bildish motor 10 or the control unit 20, the elevated temperature is thermally conducted through the motor housing 11 and the unit housing 21, and the motor The temperature sensor 13 and the unit temperature sensor 23 are reacted. As the motor temperature sensor 13 and the unit temperature sensor 23 react with each other, the pump 4 operating therethrough pumps cooling water in the flow path. As such, the cooling water is supplied and circulated in the motor water jacket 12 and the unit water jacket 22 through the supply pipe 1 and the supply branch pipes 5 and 5 '. ) And the unit housing 21 is rapidly cooled.

In particular, the connection part of the said supply pipe 1 and the supply branch pipes 5 and 5 'is equipped with the 1st 3-way switching valve 7 which can change the direction of these flow paths, and the said inflow pipe ( 2) and a second three-way valve 8 for controlling the direction of these flow paths, respectively, are connected to the connection between the inlet pipes 6 and 6 '. The three-way switching valve is operated in conjunction with each other through the individual reactions of the motor temperature sensor 13 and the unit temperature sensor 23 respectively installed in the unit 20, thereby more efficiently controlling the cooling water flow path. The efficiency is further improved.

Specifically, as shown in FIG. 4, when the motor temperature sensor 13 installed in the BLD motor 10 and the unit temperature sensor 23 installed in the control unit 20 react with each other by overheating, At the same time as the pump 4 operates, the first three-way switching valve 7 simultaneously switches the three flow paths of the supply pipe 1 and the supply branch pipes 5 and 5 'to the open state, and the second The three-way switching valve (8) of the inlet pipe (2) and the inlet pipe (6, 6 ') at the same time switching the three flow paths to the open state, the supply pipe ( 1) The cooling water discharged to the branch is supplied to the motor water jacket 12 and the unit water jacket 22 through the supply branch pipes 5 and 5 ', respectively, thereby cooling the motor and the unit in the overheated state. Cooling water in the water jacket is discharged through the inlet branch pipes (6) (6 ') and travels back through the inlet pipe (2) to the radiator (3). Depending on the heat dissipation characteristics of the radiator (3) it is to be able to be recycled by rapidly cooling the cooling water.

Through such continuous circulation of the coolant, the Bildish motor 10 and the control unit 20 can maintain a constant temperature within the normal operating range, thereby maintaining effective performance even at the peak output state and overload conditions.

In addition, as shown in FIG. 5, when a situation in which the BIDL motor 10 generates heat alone, that is, when only the motor temperature sensor 13 reacts, the flow path between the supply pipe 1 and the supply branch pipes 5 and 5 '. The first three-way control valve 7 to control is operated to open only the supply branch pipes 5 and 5 'connected to the motor water jacket 12 so that the cooling water is concentrated. The three-way switching valve (8) also opens the inlet pipe (6) (6 ') of one side connected to the motor water jacket 12, the cooling water discharged from the motor water jacket (12) is the inlet pipe (2) By allowing it to be recovered through it can be expected more excellent cooling efficiency.

On the other hand, as shown in FIG. 6, when the control unit 20 generates heat alone, that is, when only the unit temperature sensor 23 reacts, the flow path between the supply pipe 1 and the supply branch pipes 5 and 5 'is changed. The first three-way control valve 7 to control is operated to open only the supply branch pipes 5 and 5 'connected to the unit water jacket 22 so that the cooling water is concentrated. The three-way switching valve (8) also opens only the inlet branch pipes (6) and 6 'of one side connected to the unit water jacket 22, and the cooling water discharged from the unit water jacket 22 is the inlet pipe (2). By allowing it to be recovered through it can be expected more excellent cooling efficiency.

As described above, the water-cooled cooling system of the present invention allows the cooling unit to be cooled at the same time by opening all the flow paths in the simultaneous overheating situation while allowing the cooling unit to be concentrated through individual sensing of the temperature sensor corresponding to the overheating unit. The driving signal of the directional valve by the control is in charge of the electronic circuit in the control unit 20 described above, such signal control and drive control is only a general technical means, so a detailed description thereof will be omitted.

The above-described non-ELD motor for a motor having a water-cooled cooling system of the present invention has a coolant cooled to room temperature by a heat radiating action of a radiator to quickly cool the housing of the non-ELD motor and the control unit, and thus output by overheating. In addition to preventing degradation and malfunction, reasonable operation is possible under maximum output and overload conditions, while preventing overload damage and other circuit damages, thereby greatly extending the service life of the BLD motor and its control unit.

According to the individual reaction of the temperature sensor on the outer surface of the housing in conjunction with the three-way switching valve to operate and supply the flow of cooling water in a concentrated or branched manner to maximize the cooling efficiency it is possible to use the motor device rational.

Claims (2)

The motor water jacket 12 and the unit water are respectively watertightly formed on the outer surfaces of the motor housing 11 of the Bieldi motor 10 and the unit housing 21 of the control unit 20 for controlling the Bieldi motor 10. Forming the jacket 22, The motor water jacket 12 and the unit water jacket 22 are to be connected to the radiator 3 and the pump 4 through the supply pipe 1 and the inlet pipe 2, respectively, On the other end of the supply pipe 1, one end of which is connected to the pump 4, a supply branch pipe 5, 5 'is connected to the inflow side of the motor water jacket 12 and the unit water jacket 22, respectively. On the other end of the inlet pipe 2, one end of which is connected to the radiator 3, respectively, an inlet branch pipe 6, 6 'is connected to the discharge side of the motor water jacket 12 and the unit water jacket 22, The pump 4 responds to the reaction of the motor temperature sensor 13 and the unit temperature sensor 23 mounted in the motor housing 11 of the BLD motor 10 and the unit housing 21 of the control unit 20. And an electric motor having a water-cooled cooling system configured to circulate inside the motor water jacket 12 and the unit water jacket 22 along the supply pipe 1 and the inlet pipe 2. Bieldi Motors The method of claim 1, A first three-way switching valve 7 is attached to the connection portion of the supply pipe 1 and the supply branch pipes 5 and 5 ', and the inlet pipe 2 and the inlet pipe 6 and 6' are connected to each other. The connection part is equipped with a second three-way selector valve 8 so that the first three-way selector valve 7 and the second three-way selector valve 8 are described above with the motor temperature sensor 13 and the unit temperature. Bildish motor apparatus for a motor having a water-cooled cooling system, characterized in that configured to operate in response to the response of the sensor (23) to open and close the flow path.

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