KR20110053085A - Motor driver and automobile comprising the same - Google Patents

Abstract

PURPOSE: A motor driver and a vehicle comprising the same are provided to prevent the lifespan and a reliability of a motor driving unit when a capacitor is overheated by rapidly transferring the heat from the capacitor. CONSTITUTION: In a motor driver and a vehicle comprising the same, a case(201) forms the exterior the device. A capacitor(250) is included inside the case and generates heat. A plate(270) is installed in one side of the capacitor and transfer the heat from the capacitor. A heat pipe(280) is included in the plate and receives the heat from the plate A water cooling jacket(260) is included in the case and receives heat from the heat pipe to discharge it outside.

Description

Motor driver and automobile comprising the same {Motor driver and Automobile comprising the same}

The present invention relates to a motor driving unit and an automobile including the same, and more particularly, to a motor driving unit and a vehicle including the same, which emits heat generated from a capacitor and an inverter to the outside.

The automobile, which has emerged by the invention of the internal combustion engine, is an indispensable necessity in human life, but it causes energy depletion due to the main cause of environmental pollution and the consumption of enormous energy. Electric vehicles, hydrogen fuel or internal combustion engines and hybrid vehicles in combination with these are being developed and used.

Electric vehicles (EVs) are mainly powered by AC or DC motors using battery power, and are mainly classified into battery-only electric vehicles and hybrid electric vehicles. Using a motor to drive and recharging when the power is exhausted, the hybrid electric vehicle can run the engine to generate electricity to charge the battery and use this electricity to drive the electric motor to move the car.

In addition, hybrid electric vehicles can be classified into a series and a parallel method, in which the mechanical energy output from the engine is converted into electrical energy through a generator, and the electrical energy is supplied to a battery or a motor so that the vehicle is always driven by a motor. It is a concept of adding an engine and a generator to increase the mileage to an existing electric vehicle, and the parallel method can drive a vehicle with a battery power and drive two vehicles only with an engine (gasoline or diesel). In parallel, depending on the driving conditions, the engine and the motor may drive the vehicle simultaneously.

In addition, the motor control technology has also been recently developed to develop a high output, small size and high efficiency system. As the DC motor is converted to an AC motor, the output and EV power performance (acceleration performance, top speed) are greatly improved, reaching a level comparable to that of gasoline cars. As the motor rotates with high output, the motor is light and compact, and the payload and volume are greatly reduced.

Heat is generated in the motor driving unit and the motor driving unit for supplying power to the electric vehicle, and the generated heat is not discharged to the outside of the motor driving unit, so that the efficiency of the motor driving unit is decreased, and the lifespan and reliability of the motor driving unit are decreased. Therefore, there is a need for an improvement regarding a method of dissipating heat of the motor driver.

The problem to be solved by the present invention is to provide a motor driving unit for discharging the heat generated from the capacitor and the inverter to the outside and a vehicle including the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the motor driving unit according to an embodiment of the present invention,

A case forming an appearance; A capacitor provided inside the case and generating heat; A plate provided at one side of the capacitor to receive heat generated from the capacitor; A heat pipe provided on the plate to receive heat from the plate; And a water cooling jacket provided in the case and receiving heat from the heat pipe to release heat to the outside. .

In addition, in order to achieve the above object, the motor driving unit according to an embodiment of the present invention,

A case forming an appearance; A capacitor provided inside the case and generating heat; A plate in contact with a lower portion of the capacitor; A water cooling jacket provided inside the case; And a heat pipe provided between the plate and the water cooling jacket, the one side being in contact with the plate and the other side being in contact with the water cooling jacket. It is configured to include.

In addition, in order to achieve the above object, an automobile according to an embodiment of the present invention,

A motor driving unit for converting DC power into AC power; A motor rotating by receiving AC power from the motor driving unit, and a wheel rotating by the motor; Includes, the motor driving unit, the case forming an appearance; A capacitor provided inside the case and generating heat; A plate provided at one side of the capacitor to receive heat generated from the capacitor; A heat pipe provided on the plate to receive heat from the plate; And a water cooling jacket provided in the case and receiving heat from the heat pipe to release heat to the outside. .

Specific details of other embodiments are included in the detailed description and the drawings.

According to the vehicle of the present invention has one or more of the following effects.

First, since the plate is provided in the capacitor, the plate is quickly transferred to the heat of the capacitor, to prevent the capacitor from overheating and deteriorate the life and reliability of the motor drive.

Second, by connecting the plate and the water cooling jacket with a heat pipe, the heat transferred from the plate is quickly transferred to the water cooling jacket.

Third, the coolant flows through the water cooling jacket, so that the heat received by the water cooling jacket can be quickly released to the outside.

Fourth, the water cooling jacket can quickly cool the heat generated by the inverter, thereby improving the lifetime and reliability of the inverter.

Fifth, since the water-cooling jacket is in contact with the inverter to directly receive the heat generated by the inverter to be discharged to the outside, it is possible to quickly cool the heat generated by the inverter.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for describing the automobile 1 according to embodiments of the present invention.

1 is a schematic diagram showing a vehicle body of a motor vehicle 1 according to an embodiment of the present invention.

Referring to FIG. 1, an automobile 1 according to an embodiment of the present invention may include a battery 100 that supplies power, a motor driver 200 that receives power from the battery 100, and a motor driver 200. Driven by rotating the motor 300, the front wheel 510 and the rear wheel 520 rotated by the motor 300, the front wheel suspension 610 and rear wheel suspension to block the vibration of the road surface to the vehicle body ( 620 is provided. In addition, a drive gear (not shown) for shifting the rotational speed of the motor 300 according to the gear ratio may be additionally provided.

The battery 100 supplies power to the motor 300. The battery 100 may be formed of a plurality of unit cells. The plurality of unit cells may be managed by a battery management system (BMS) to maintain a constant voltage, and emit a constant voltage by the battery management system. The battery 100 is preferably configured as a secondary battery capable of charging and discharging, but is not limited thereto.

The motor driver 200 receives DC power from the battery 100 by the DC power cable 210. The motor driving unit 200 converts the DC power received from the battery 100 into AC power and supplies the same to the motor 300. The AC power to be converted is preferably a three-phase AC power supply. The motor driver 200 supplies three-phase AC power to the motor 300 through the AC power cable 220 provided in the motor driver 200. Although the motor driving unit 200 of FIG. 1 illustrates an AC power cable 220 including three cables, three cables may be provided in a single cable. The structure of the motor driving unit 200 will be described below with reference to FIG. 3.

The motor 300 is composed of a stator 310 that is fixed without rotation and a rotating rotor 320, and rotates by receiving an AC power supplied from the motor driving unit 200. The motor 300 is provided with an AC power cable 220 to receive the three-phase AC power supplied from the motor driving unit 200. When the three-phase AC power is applied to the motor 300, the stator 310 of the motor 300 receives the three-phase AC power to generate a magnetic field. The rotor 320 rotates because the magnetic field generated by the stator 310 and the magnetic field of the permanent magnet provided in the rotor 320 are repulsed. Rotation of the rotor 320 generates rotational energy and transfers it to a drive gear, which will be described later.

One side of the motor 300 may be provided with a drive gear (not shown). The drive gear converts the rotational energy of the motor 300 according to the gear ratio. The rotational energy output from the drive gear is transmitted to the front wheel 510 and / or the rear wheel 520 to allow the vehicle 1 to move.

The front wheel suspension 610 and the rear wheel suspension 620 support the front wheel 510 and the rear wheel 520 with respect to the vehicle body, respectively. The up-down direction of the front wheel suspension 610 and the rear wheel suspension 620 is supported by a spring or a damping mechanism so that the vibration of the road surface does not touch the vehicle body.

The front wheel 510 may be further provided with a steering device (not shown). The steering device is a device for adjusting the direction of the front wheel 510 to drive the vehicle 1 in a direction intended by the driver.

2 is a block diagram illustrating a motor 300, a battery 100, and a motor driver 200 according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the battery 100 for supplying power to the motor driving unit 200, the motor driving unit 200 for receiving the DC power from the battery 100 and applying the converted AC power to the motor 300. It is configured to include a motor 300 that is driven and rotated by.

The motor driving unit 200 includes a capacitor 250 for smoothing and storing the DC power supplied from the battery 100, an inverter 230 for changing the DC power received from the capacitor 250 into AC power, and an inverter 230. It is configured to include an inverter control unit 240 to control.

The capacitor 250 is a kind of capacitor and smoothes the DC power supplied from the battery 100. Since the DC power supplied from the battery 100 may not be constant, the capacitor 250 stores and smoothes the DC power. The smoothed DC power is supplied to the inverter 230. The capacitor 250 may be configured as a DC-link capacitor.

The inverter 230 converts the DC power into AC power. The inverter 230 may be provided with a plurality of switching elements (not shown). The DC power smoothed by the on / off operation of the switching element is converted into a three-phase AC power supply of a predetermined frequency and applied to the motor 300.

Inverter 230 is a pair of upper arm switching element and lower arm switching element are respectively connected in series with each other, a total of three pairs of upper arm and lower arm switching element is connected in parallel to each other. The switching elements in the inverter 230 perform on / off operations of the respective switching elements based on the switching control signal Sic of the inverter 230 from the inverter control unit 240. As a result, a three-phase AC power supply having a predetermined frequency is applied to the motor 300.

The inverter controller 240 outputs the inverter 230 switching control signal Sic to the inverter 230 in order to control the operation of the switching element of the inverter 230. The switching control signal Sic of the inverter controller 240 controls the operation of the above-described switching element as a switching control signal for PWM.

3 is a perspective view of the motor driving unit 200 and the vehicle 1 including the same according to an embodiment of the present invention, and FIG. 4 is a front view of FIG. 3.

3 and 4, the vehicle 1 according to an embodiment of the present invention, the motor driving unit 200 for converting DC power into AC power, and receives the AC power from the motor driving unit 200 to rotate The motor 300 is configured to include, and the wheels (510 to 520) rotated by the motor.

In addition, the motor driving unit 200 is provided on one side of the case 201 forming the appearance, the capacitor 250 provided inside the case 201 and generating heat, and the capacitor 250, and the capacitor 250. Plate 270 that is in contact with the bottom of the heat transfer from the capacitor 250, the heat pipe 280 is provided in the plate 270 to receive heat from the plate 270, and the case 201 Is provided in the interior of the heat pipe 280 receives the heat is configured to include a water cooling jacket 260 for dissipating heat to the outside.

The case 201 forms an appearance. The case 201 is formed to seal the inside thereof. Each of the above-described components is provided in the case 201, and the inside of the case 201 is sealed to prevent penetration of outside air or moisture. The case 201 may be provided in front of the vehicle body, and the shape of the case 201 may vary according to the shape of the vehicle body.

The capacitor 250 stores and smoothes the DC power as described above. The smoothed DC power is supplied to the inverter 230. The capacitor 250 may be configured as a DC-link capacitor. When the direct current power is stored, the direct current power is stored at a high voltage in the capacitor 250, and heat is generated due to collision and vibration movement between electrons stored therein in the capacitor 250. The generated heat flows inside the sealed case 201, which lowers the operating efficiency of the inverter 230, so that it is required to be discharged to the outside, and heat is transferred to the plate 270 which will be described later and released to the outside.

The capacitor 250 may be provided inside the case 201 and may be provided on an upper portion of the inside of the case 201 according to an embodiment. In addition, it may be provided on the side of the case 201 according to the shape and configuration of the case 201. Hereinafter, the capacitor 250 is described as being provided above the case 201, but the position of the capacitor 250 is not limited thereto.

The plate 270 is provided at one side of the capacitor 250. The plate 270 includes all components in contact with the capacitor 250, and the plate 270 is preferably formed of a metal having excellent thermal conductivity, but the material of the plate 270 is not limited thereto.

In addition, depending on the position of the capacitor 250 may be in contact with the side or top surface of the capacitor 250. In addition, the receiving portion recessed on one side of the capacitor 250 is formed, the plate 270 is accommodated in the receiving portion can be contacted below will be described that the plate 270 is in contact with the lower portion of the capacitor 250, The position of the plate 270 is not limited. The plate 270 is in contact with the lower portion of the capacitor 250 receives the heat generated from the capacitor 250.

The plate 270 is provided to contact the bottom of the capacitor 250 as wide as possible. As the contact area between the plate 270 and the capacitor 250 becomes wider, the conductivity of heat transferred from the capacitor 250 to the plate 270 is improved. The plate 270 receives heat from the capacitor 250 and transfers heat to the heat pipe 280 described later.

The heat pipe 280 is provided between the plate 270 and the water cooling jacket 260 described later. The plate 270 is provided with a heat pipe 280 that receives heat from the plate 270, the heat pipe 280 transfers heat to the water cooling jacket 260 to be described later.

One side of the heat pipe 280 is in contact with the plate 270 receives heat from the plate 270. The other side of the heat pipe 280 contacts the water cooling jacket 260 to transfer heat to the water cooling jacket 260.

One end of the heat pipe 280 may be in contact with the plate 270. In addition, one side of the heat pipe 280 may be in contact with a portion of the outer peripheral surface is inserted into the plate 270. The other end of the heat pipe 280 may be in contact with the water cooling jacket 260. In addition, a portion of the outer circumferential surface of the heat pipe 280 may be inserted into and contacted with the water cooling jacket 260. The present invention includes all forms in which the heat pipe 280 is in contact with the water cooling jacket 260 to transfer heat.

Heat pipe 280 according to an embodiment of the present invention is a pipe in which a plurality of hollows are formed therein, and a volatile liquid is accommodated therein. The volatile liquid therein may be formed of a liquid such as methanol, acetone, water, mercury, etc., but the scope of the present invention is not limited thereto. The material of the body of the heat pipe 280 may be formed of copper, stainless steel, ceramic, tungsten, or the like, and the spirit of the present invention is not limited to the above materials.

The heat pipe 280 receives heat from the plate 270 and transfers heat to the water cooling jacket 260. When heat is transferred to one side of the heat pipe 280, the fluid provided inside the heat pipe 280 receives heat and evaporates, and the evaporated fluid moves to the other side of the heat pipe 280 to contact the other side, Heat is transferred to the plate 270. The heat transferred fluid is liquefied again and returned to the original one side, and is in a state of receiving heat again.

The water cooling jacket 260 may be provided inside or outside the case 201 and receives heat from the heat pipe 280 to release heat to the outside. The water cooling jacket 260 has a flow path formed by a hollow or a pipe therein to allow the coolant to flow therein. The cooling water is radiated from the outside to flow into the water cooling jacket 260, and the heat received from the heat pipe 280 is transferred to the cooling water of the water cooling jacket 260.

Cooling water flows to the outside along the flow path along with the transferred heat, and heat is transferred to the outside to release heat to the outside. Since heat is released to cool the motor driver 200, the efficiency of the motor driver 200 is improved. In addition, as heat is released to the outside, the lifespan and reliability of the motor driving unit 200 are improved.

According to an embodiment, the water cooling jacket 260 may be provided at the lower side of the case 201, and may be provided at the upper side of the case 201. In addition, the case 201 may be provided below the outside. The position of the water cooling jacket 260 may vary depending on the shape of the motor driving unit 200. Hereinafter, the water cooling jacket 260 will be described below as being provided inside the case 201. The idea of the invention is not limited.

An inverter 230 for converting DC power into AC power may be further provided below the capacitor 250. As described above, the inverter 230 generates heat by the on / off operation of the switching element. The generated heat is flowed inside the sealed case 201, which lowers the operating efficiency of the inverter 230, and therefore is required to be discharged to the outside. At this time, the water cooling jacket 260 provided in the lower portion of the case 201 receives heat generated from the inverter 230 and discharges it to the outside.

The inverter 230 is provided adjacent to the water cooling jacket 260, and in some embodiments, the inverter 230 may be provided adjacent to an upper portion of the water cooling jacket 260. Hereinafter, the inverter 230 is described as being provided adjacent to the upper portion of the water cooling jacket 260, but the position of the inverter 230 is not limited thereto. In addition, the inverter 230 may be in contact with the water cooling jacket 260. When the inverter 230 contacts the water cooling jacket 260, the water cooling jacket 260 quickly releases heat generated by the inverter 230 to the outside. As heat inside the case 201 is released to the outside, the efficiency of the motor driving unit 200 is improved. In addition, as heat is released to the outside, the lifespan and reliability of the motor driving unit 200 are improved.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1 is a schematic diagram illustrating a vehicle body of a vehicle according to an embodiment of the present invention.

2 is a block diagram illustrating a motor, a battery, and a motor driving unit according to an embodiment of the present invention.

3 is a perspective view of a motor driving unit and a vehicle including the same according to an embodiment of the present invention, and FIG. 4 is a front view of FIG. 3.

Claims (15)

A case forming an appearance; A capacitor provided inside the case and generating heat; A plate provided at one side of the capacitor to receive heat generated from the capacitor; A heat pipe provided on the plate to receive heat from the plate; And A water cooling jacket provided in the case and receiving heat from the heat pipe and dissipating heat to the outside; Motor driving unit comprising a. The method of claim 1, The capacitor is a motor driving unit provided on the inside of the case. The method of claim 1, The plate is a motor driving unit provided in the lower portion of the capacitor. The method of claim 1, The lower portion of the capacitor is a motor driving unit further provided with an inverter for converting DC power into AC power. The method of claim 1, The water cooling jacket is a motor driving unit provided in the lower inside of the case. The method of claim 1, The water cooling jacket is a motor drive unit for discharging the heat received by flowing the coolant flows to the outside. The method of claim 1, Adjacent to the upper portion of the water cooling jacket, the motor drive unit further comprises an inverter for converting the DC power into AC power. The method of claim 7, wherein The inverter generates heat, The water cooling jacket is a motor driving unit for receiving heat from the inverter to release heat to the outside. A case forming an appearance; A capacitor provided inside the case and generating heat; A plate in contact with a lower portion of the capacitor; A water cooling jacket provided inside the case; And A heat pipe provided between the plate and the water cooling jacket, one side of which is in contact with the plate and the other side of which is in contact with the water cooling jacket; Motor driving unit comprising a. 10. The method of claim 9, The plate is a motor driving unit for receiving heat from the capacitor to transfer heat to the heat pipe. 10. The method of claim 9, The heat pipe receives the heat from the plate, the motor driving unit for transferring heat to the water cooling jacket. 10. The method of claim 9, The water cooling jacket is a motor driving unit for receiving heat from the heat pipe to discharge heat to the outside. 10. The method of claim 9, The motor driving unit is provided adjacent to the water cooling jacket, and further provided with an inverter for converting DC power into AC power. The method of claim 13, The inverter is in contact with the water cooling jacket, The water cooling jacket is a motor drive unit for dissipating heat generated by the inverter to the outside. A motor driving unit for converting DC power into AC power; A motor rotating by receiving AC power from the motor driver; And A wheel rotating by the motor; Including, The motor driving unit, A case forming an exterior of the motor driving unit; A capacitor provided inside the case and generating heat; A plate provided at one side of the capacitor to receive heat generated from the capacitor; A heat pipe provided on the plate to receive heat from the plate; And A water cooling jacket provided in the case and receiving heat from the heat pipe and dissipating heat to the outside; Car including.

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