CN211090354U

CN211090354U - Motor controller

Info

Publication number: CN211090354U
Application number: CN201921034742.0U
Authority: CN
Inventors: 王正一; 张何; 姜保罗; 王天昊; 王奇龙; 迪马·普勒斯图帕
Original assignee: Nuodinghan Yuyao Intelligent Electrification Research Institute Co ltd
Current assignee: Nuodinghan Yuyao Intelligent Electrification Research Institute Co ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-07-24
Anticipated expiration: 2029-07-04

Abstract

The utility model relates to a motor technical field especially relates to a motor controller. Including control panel (5), drive plate and radiating piece, be equipped with power device on the drive plate, its characterized in that: the two driving plates are respectively a first driving plate (2) and a second driving plate (7), the radiating piece is divided into two parts, namely a first radiating piece (1) and a second radiating piece (6), one part of power devices are arranged on the first driving plate (2), the other part of power devices are arranged on the second driving plate (7), the first driving plate (2) and the second driving plate (7) are respectively arranged on two sides of the control plate (5), the first radiating piece (1) is arranged on the outer side of the first driving plate (2), the second radiating piece (6) is arranged on the outer side of the second driving plate (7), and the first driving plate (2) and the second driving plate (7) are electrically connected through a connecting piece. The motor controller has a good heat dissipation effect.

Description

Motor controller

Technical Field

The utility model relates to a motor technical field especially relates to a motor controller.

Background

A typical motor controller is composed of a control board, a drive board, and a heat sink. Because the power devices (such as MOSFETs or IGBTs) are all disposed on the driving board and the power devices generally generate heat more seriously, a certain heat dissipation structure needs to be designed to transfer heat generated inside. The traditional motor controller mainly dissipates heat from one surface of a driving plate, so that the heat dissipation effect is poor, the temperature of the motor controller is too high during working, and the service life of the motor controller is short; meanwhile, poor heat dissipation results in that the controller cannot bear large current output, which causes the power of the motor controller to be reduced. And the motor controller needs enough large electrolytic capacitors to be connected in parallel at two ends of the bus voltage for stabilizing the voltage and protecting the power part circuit, but the traditional motor controller cannot be provided with too many electrolytic capacitors due to structural limitation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the motor controller has a good heat dissipation effect and can be provided with more electrolytic capacitors.

The utility model adopts the technical proposal that: the utility model provides a motor controller, includes control panel, drive plate and radiating piece, be equipped with power device on the drive plate, the drive plate is two, is first drive plate and second drive plate respectively, the radiating piece is two parts, is first radiating piece and second radiating piece respectively, and wherein a part power device sets up on first drive plate, and another part power device sets up on the second drive plate, and first drive plate and second drive plate set up respectively in the control panel both sides, and first radiating piece sets up in the first drive plate outside, and the second radiating piece sets up in the second drive plate outside, and is connected through the connecting piece electricity between first drive plate and the second drive plate.

Preferably, the first drive board is provided with an upper bridge arm of the drive circuit, the power device in the upper bridge arm is located on one side of the first drive board close to the first heat dissipation element, the second drive board is provided with a lower bridge arm of the drive circuit, and the power device in the lower bridge arm is located on one side of the second drive board close to the second heat dissipation element.

Preferably, the first heat dissipation element and the second heat dissipation element are made of aluminum materials, the first heat dissipation element and the second heat dissipation element are respectively provided with a heat dissipation air duct and a heat dissipation fan blade, the power device on the first driving board is in contact with the first heat dissipation element through a heat conduction material, and the power device on the second driving board is in contact with the second heat dissipation element through a heat conduction material.

Preferably, an electrolytic capacitor is provided on one side of the first drive plate, and an electrolytic capacitor is also provided on one side of the second drive plate.

Preferably, the first heat dissipation member and the second heat dissipation member are combined to form a complete motor controller shell, the first heat dissipation member and the second heat dissipation member are combined to form a mounting cavity, and the control board, the first drive board and the second drive board are all arranged in the mounting cavity.

Compared with the prior art in the structure more than adopting, the utility model has the advantages of it is following: the motor controller has the advantages that one drive board is changed into the two drive boards, the power devices are arranged on the outer sides of the two drive boards respectively, then the two heat dissipation parts are arranged to dissipate heat of the power devices on the drive boards, so that the heat dissipation effect of the motor controller can be improved, the working temperature is reduced, the output power of the motor controller is improved, and the service life of the motor controller is prolonged. In addition, the manufacturer can choose to arrange more large electrolytic capacitors to improve the reliability of the motor controller; and the heat dissipation piece is directly made into a shell of the motor controller, and the shell is provided with a heat dissipation air duct and fan blades, so that the heat dissipation effect is better.

Drawings

Fig. 1 is an exploded view of a prior art motor controller.

Fig. 2 is an explosion diagram of the motor controller of the present invention.

Fig. 3 is a schematic structural diagram of the motor controller with the heat sink removed.

Fig. 4 is an electrical schematic diagram of the motor controller of the present invention.

As shown in the figure: 1. a first heat sink; 2. a first drive plate; 3. a first copper bar; 4. a first high temperature silicone wire; 5. a control panel; 6. a second heat sink; 7. a second drive plate; 8. a second high temperature silicone wire; 9. an electrolytic capacitor; 10. and a second copper bar.

Detailed Description

The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to the following specific embodiments.

As shown in fig. 2 to 3, a motor controller includes a control board 5, a drive board, and a heat sink, wherein:

the control board 5 is composed of a voltage conversion circuit, an MCU minimum system circuit, an input signal processing circuit and a driving circuit. The voltage conversion circuit converts the bus input voltage into the working voltage (3.3V, 5V or 12V) of the chip in the board; the MCU minimum system circuit can realize the normal work of the control unit; the input signal is transmitted to the MCU through the input signal processing circuit; the drive circuit transmits 6 paths of PWM control signals of the MCU to 6 paths of grids of the drive plate, so that the power device (MOSFET or IGBT) is controlled to be closed, and a specific waveform is generated to control the motion of the motor. In the embodiment, the control board 5 is located between the first drive board 2 and the second drive board 7, the control board 5 transmits the output signals to the two drive boards through the pin header, and simultaneously receives three-phase voltage signals, current detection signals, temperature detection signals and the like fed back from the drive boards through the pin header;

the heat dissipation member is divided into a first heat dissipation member 1 and a second heat dissipation member 6, in this embodiment, a motor controller housing is divided into an upper housing and a lower housing, and the control board 5 and the drive board are both arranged in a mounting cavity between the upper housing and the lower housing;

the driving board mainly comprises a power device (MOSFET or IGBT), a current sampling circuit and a temperature sampling circuit. The drive board in this embodiment is split into the first drive board 2 and the second drive board 7. On one side, the first driving board 2 and the second driving board 7 are electrically connected with a positive input electrode and a negative input electrode of a bus power supply respectively through two second copper bars 10, and the two second copper bars 10 are connected with an external power supply through a second high-temperature silica gel line 8. On the other side, the first driving board 2 and the second driving board 7 are electrically connected with three phases (phase A, phase B and phase C) of the motor through three first copper bars 3 respectively, and the three first copper bars 3 are connected with the external motor through a first high-temperature silica gel wire 4. The power device on the first driving board 2 is a main heating source and is in contact with the upper shell of the motor controller through heat conducting glue to transfer heat to the upper shell; and a power device on the second driving plate 7 is in contact with the lower shell of the motor controller through heat conducting glue, and heat is transferred to the lower shell. The upper shell and the lower shell are provided with a plurality of bulges to form fan blades, and a plurality of air channels are formed between the bulges for air to flow through and take away heat on the shell. And 4 standard large electrolytic capacitors 9 with the diameter of 12.5mm are arranged on the

first driving plate

2, and 3 standard large electrolytic capacitors 9 with the diameter of 12.5 are arranged on the second driving plate 7, and the large electrolytic capacitors 9 are connected in parallel at two ends of the bus voltage.

Referring to fig. 4, which is an electrical diagram of a motor controller, S1 to S6 are 6 power devices, and when a plurality of power devices are connected in parallel, there are 6 × n power devices, a driving board is connected to an external power source through PVDC and PGND, and the driving board is connected to a motor through a, B, and C.

The structure of the specific embodiment can reduce the length of the motor controller, so that the structure is more compact; the height of the motor controller is increased, so that more large electrolytic capacitors 9 can be arranged, and a manufacturer can select and arrange more large electrolytic capacitors 9 according to actual requirements to improve the reliability of the controller; and a complete three-phase drive circuit PCB circuit board can only select 4 layers of PCB circuit boards, and a complete drive board is divided into a first drive board 2 and a second drive board 7, and then 2 layers of PCB circuit boards can be selected for use. The producer can realize the purpose of reducing the cost by selecting and adopting a 2-layer PCB circuit board.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a motor controller, includes control panel (5), drive plate and radiating piece, be equipped with power device on the drive plate, its characterized in that: the two driving plates are respectively a first driving plate (2) and a second driving plate (7), the radiating piece is divided into two parts, namely a first radiating piece (1) and a second radiating piece (6), one part of power devices are arranged on the first driving plate (2), the other part of power devices are arranged on the second driving plate (7), the first driving plate (2) and the second driving plate (7) are respectively arranged on two sides of the control plate (5), the first radiating piece (1) is arranged on the outer side of the first driving plate (2), the second radiating piece (6) is arranged on the outer side of the second driving plate (7), and the first driving plate (2) and the second driving plate (7) are electrically connected through a connecting piece.

2. The motor controller of claim 1, wherein: an upper bridge arm of a driving circuit is arranged on the first driving board (2), a power device in the upper bridge arm is positioned on one side, close to the first heat dissipation part (1), of the first driving board (2), a lower bridge arm of the driving circuit is arranged on the second driving board (7), and the power device in the lower bridge arm is positioned on one side, close to the second heat dissipation part (6), of the second driving board (7).

3. The motor controller of claim 2, wherein: the first heat dissipation piece (1) and the second heat dissipation piece (6) are made of aluminum materials, a heat dissipation air channel and heat dissipation fan blades are arranged on the first heat dissipation piece (1) and the second heat dissipation piece (6), a power device on the first driving board (2) is in contact with the first heat dissipation piece (1) through a heat conduction material, and a power device on the second driving board (7) is in contact with the second heat dissipation piece (6) through a heat conduction material.

4. The motor controller of claim 1, wherein: an electrolytic capacitor (9) is arranged on one side of the first driving plate (2), and an electrolytic capacitor (9) is also arranged on one side of the second driving plate.

5. The motor controller of claim 1, wherein: the motor controller is characterized in that the first radiating piece (1) and the second radiating piece (6) are combined to form a complete motor controller shell, the first radiating piece (1) and the second radiating piece (6) are combined to form an installation cavity, and the control board (5), the first drive board (2) and the second drive board (7) are arranged in the installation cavity.