Permanent magnet motor driver and control system thereof

Abstract

The invention provides a permanent magnet motor driver and a control system thereof, and belongs to the technical field of large water pumps. The problem that an existing permanent magnet motor driver applied to a large water pump is poor in heat dissipation effect is solved. The permanent magnet motor driver comprises a driver body, a cover plate and a partition plate, the front side edge and the rear side edge of the driver body are each provided with a plurality of cooling fins, a mounting cavity and a cooling cavity are formed in the driver body through the partition plate, a cooling fan is arranged in the cooling cavity, and a ventilation grille is arranged in the middle of the partition plate. A water cooling mechanism is arranged at the rear end of the cooling fan and communicated with the water inlet and the water outlet of the water pump body, and a water flow loop is formed through water pressure when the water pump works. The temperature and humidity in the driver can be reduced, the driver is more suitable for being used under complex working conditions and is not easily influenced by high temperature and high humidity, the efficiency is improved, and the power consumption of a heating device is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of large water pumps and relates to a permanent magnet motor driver and a control system thereof. Background Art

[0002] A permanent magnet motor driver is an actuator that converts electrical pulses into angular displacements. When the driver receives a pulse signal, it drives the motor to rotate in the set direction. When general switches or electronic components cannot be used as switches to control the motor, a driver must be added to control the motor. The driver can also be used to adjust the speed of the motor by controlling the pulse frequency and controlling the forward and reverse rotation of the motor, thereby realizing speed regulation, energy saving and intelligent control of the water pump load driven by the permanent magnet motor.

[0003] At present, the permanent magnet motor dedicated drivers used in water pumps still have the following major problems: poor reliability, poor frequency conversion capability, narrow adaptability to working conditions, and high vibration and noise. For example, when controlling water pumps under extreme working conditions (such as sewage conditions), water pump control often becomes out of adjustment or even fails, resulting in low reliability of the controller. In addition, under conditions of high humidity and high temperature, the parameters of components such as resistance, inductance, and capacitance in the controller will change, which will cause functional imbalance and failure of the hardware circuit, and even cause accidents such as capacitor explosion. Summary of the invention

[0004] The purpose of the present invention is to provide a permanent magnet motor driver and a control system thereof with improved efficiency and reduced heat generation to solve the above problems existing in the prior art.

[0005] The object of the present invention can be achieved by the following technical solutions: A permanent magnet motor driver, characterized in that it includes a driver body, a cover plate mounted in cooperation with the driver body, and a partition plate located inside the driver body and used for separation, the front and rear sides of the driver body are both provided with a plurality of heat dissipation fins for improving heat dissipation efficiency, and the driver body is respectively formed with an installation cavity and a heat dissipation cavity through the partition plate; A heat dissipation fan is arranged in the heat dissipation cavity to improve the air circulation efficiency in the installation cavity and to have a rapid heat dissipation effect; A ventilation grille is provided in the middle of the partition for rapid air circulation; A water cooling mechanism connected to the water pump body and used to improve heat dissipation efficiency is arranged at the rear end of the heat dissipation fan. The water cooling mechanism is connected to the water inlet and outlet of the water pump body and forms a water flow loop through the water pressure when the water pump is working.

[0006] In the above-mentioned permanent magnet motor driver, the water cooling mechanism includes a water cooling main pipe connected to the water inlet of the water pump, a water cooling sub-pipe connected to the water outlet of the water pump, and a plurality of water cooling branch pipes, wherein the water cooling main pipe and the water cooling sub-pipe are connected through a plurality of water cooling branch pipes.

[0007] In the above-mentioned permanent magnet motor driver, a plurality of the water cooling branch pipes are wound with a connection unit for improving the connection strength and heat dissipation efficiency, and the connection unit is composed of a plurality of connection ribs; In the above-mentioned permanent magnet motor driver, the connecting ribs are sequentially wound around a plurality of water-cooling branch pipes and connected to the two side walls inside the driver body.

[0008] In the above-mentioned permanent magnet motor driver, the driver body is arranged in an open structure, the water-cooling auxiliary pipe is arranged in the driver body along the bottom of its cover plate, and there is a gap between the partition plate and the cover plate for the water-cooling auxiliary pipe to pass through.

[0009] In the above-mentioned permanent magnet motor driver, the cover plate is provided with a plurality of heat dissipation strip holes for rapid heat flow and volatilization, and the plurality of heat dissipation strip holes are sequentially spaced apart from each other on the cover plate.

[0010] In the above-mentioned permanent magnet motor driver, a plurality of heat dissipation fins are sequentially and spaced apart on the front and rear side walls of the driver body, and a copper sheet for improving heat dissipation efficiency is laid on the bottom of the installation cavity.

[0011] A permanent magnet motor driver control system, characterized in that it includes the driver body, cooling water mechanism and cooling fan as described in claim 1; a temperature and humidity sensor is arranged in the driver body, a flow regulating valve is arranged in the water cooling mechanism, and a controller is arranged in the driver body; the temperature and humidity sensor and the flow regulating valve are electrically connected to their controller, and the water flow velocity in the water cooling mechanism and the cooling fan wind force can be controlled by the controller, and the controller can synchronously adjust the water flow velocity in the water cooling mechanism and the cooling fan wind force according to the temperature and humidity sensor.

[0012] Compared with the prior art, the permanent magnet motor driver and its control system have a simple structural design. By providing a cooling fan and a water cooling mechanism, the heat inside the driver body can be effectively and rapidly dissipated, greatly improving its heat dissipation efficiency. At the same time, utilizing the characteristics of the driver being applied to permanent magnet motors of large water pumps, a water cooling mechanism connected to the water inlet and outlet of the water pump is added to effectively realize water cooling of the inside of the driver body, achieving both water cooling and air cooling effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a three-dimensional structural schematic diagram of the permanent magnet motor driver.

[0014] Figure 2 This is a schematic diagram of the local three-dimensional structure of the permanent magnet motor driver.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the cooling fan of the permanent magnet motor driver.

[0016] In the figure, 1. driver body; 2. cover plate; 3. partition plate; 4. heat sink fins; 5. ventilation grille; 6. heat sink fan; 7. water cooling main pipe; 8. water cooling auxiliary pipe; 9. water cooling branch pipe; 10. connecting rib; 11. gap; 12. heat sink hole. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, the permanent magnet motor driver comprises a driver body 1, a cover plate 2 mounted in cooperation with the driver body 1, and a partition plate 3 located inside the driver body 1 and used for separation. The driver body 1 is provided with a plurality of heat dissipation fins 4 for improving heat dissipation efficiency on both the front and rear sides. An installation cavity and a heat dissipation cavity are respectively formed in the driver body 1 through the partition plate 3. A heat dissipation fan 6 for improving air circulation efficiency in the installation cavity and having a rapid heat dissipation effect is provided in the heat dissipation cavity. A ventilation grille 5 for rapid air circulation is provided in the middle of the partition plate 3. A water cooling mechanism connected to a water pump body and used for improving heat dissipation efficiency is provided at the rear end of the heat dissipation fan 6. The water cooling mechanism is connected to a water inlet and a water outlet of the water pump body, and forms a water flow circuit through the water pressure when the water pump is working. The water cooling mechanism comprises a water cooling main pipe 7 connected to the water inlet of the water pump, and a water cooling main pipe 7 connected to the water inlet of the water pump. A water-cooling auxiliary pipe 8 is connected to the water outlet of the water pump, and several water-cooling branch pipes 9 are connected. The water-cooling main pipe 7 is connected to the water-cooling auxiliary through several water-cooling branch pipes 9. Several water-cooling branch pipes 9 are wound with connection units for improving their connection strength and having the function of improving heat dissipation efficiency. The connection unit is composed of several connection ribs 10, which are wound on several water-cooling branch pipes 9 in sequence and connected to the two side walls inside the driver body 1. The structure is simple in design. By providing a cooling fan 6 and a water-cooling mechanism, the inside of the driver body can be effectively and quickly dissipated of heat and volatilized, and the heat dissipation efficiency is greatly improved. At the same time, by utilizing the characteristics of the driver applied to the permanent magnet motor of a large water pump, a water-cooling mechanism connected to the water inlet and outlet of the water pump is added, which effectively realizes water cooling inside the driver body and achieves the dual effects of water cooling and air cooling.

[0019] How it works When the water pump is working, the driver body controls the motor to start running, and the water-cooling main pipe 7 connected to the water inlet of the water pump uses the water pressure difference to make the water flow enter the water-cooling main pipe 7, and is diverted to the water-cooling auxiliary pipe 8 through a plurality of water-cooling branch pipes 9 and refluxed to the water outlet of the water pump. Since a plurality of water-cooling branch pipes are located behind the cooling fan 6, the cooling fan 6 and the water flow of the water cooling mechanism circulate to achieve air cooling and water cooling, and a double cooling effect. At the same time, in order to ensure that the heating element of the driver body is evenly cooled, a partition 3 and a ventilation grille 5 located in the middle of the partition 3 are provided to make the wind flow evenly and smoothly, thereby ensuring the uniform heat dissipation of the heating element; To improve heat dissipation, the following measures can be taken: the heat generating components are evenly distributed in the installation cavity of the driver body to facilitate the heat dissipation of the cover plate 2 and the driver body as a whole, and the temperature sensitive components other than the temperature and humidity sensor are kept away from components with large heat generation. For heat generating components, considering their heat dissipation requirements, copper sheets are laid under the driver body or heat sinks are installed to improve efficiency and reduce the power consumption of heat generating components. Low power consumption integrated circuits and power transistors with low saturation voltage drop are preferred; The design for the heat dissipation requirements of the heat sink 4 requires actual demand design and optimization of the driver body height ha, the heat sink 4 height hb, the heat sink 4 thickness Ld, the heat sink 4 spacing Lb, the heat sink 4 width Lc, and the heat sink 4 total length La.

[0020] To further elaborate, in order to improve its heat dissipation efficiency and facilitate its installation, the driver body is arranged in an open structure, the water-cooling auxiliary pipe 8 is arranged along the bottom of its cover plate 2 and penetrates into the driver body, and there is a gap 11 between the partition plate 3 and the cover plate 2 for the water-cooling auxiliary pipe 8 to pass through.

[0021] To further elaborate, in order to achieve rapid volatilization of heat inside the driver body, the cover plate 2 is provided with a plurality of heat dissipation holes 12 for rapid heat flow and volatilization, and the plurality of heat dissipation holes 12 are sequentially spaced apart on the cover plate 2 .

[0022] To further elaborate, in order to improve the heat dissipation efficiency of the driver body, a plurality of heat dissipation fins 4 are sequentially and spaced apart on the front and rear side walls of the driver body, and a copper sheet for improving the heat dissipation efficiency is laid on the bottom of the installation cavity.

[0023] The permanent magnet motor driver control system includes a driver body, a cooling water mechanism and a cooling fan 6; a temperature and humidity sensor is arranged in the driver body, a flow regulating valve is arranged in the water cooling mechanism, and a controller is arranged in the driver body; the temperature and humidity sensor and the flow regulating valve are electrically connected to the controller, through which the water flow velocity in the water cooling mechanism and the wind force of the cooling fan 6 can be controlled, and the controller can synchronously adjust the water flow velocity in the water cooling mechanism and the wind force of the cooling fan 6 according to the temperature and humidity sensor, and the control system can effectively realize the intelligent control of the water pump and its heat dissipation, and the temperature and humidity sensor is used to monitor the internal temperature of the driver body in real time, so as to intelligently control and adjust the flow regulating valve and the cooling fan 6, and realize and adjust the internal temperature of the driver body according to the wind force and water flow velocity, so as to maintain a constant temperature working state and its optimal temperature range.

[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0025] Although the terms such as driver body 1, cover plate 2, partition plate 3, heat dissipation fin 4, ventilation grille 5, heat dissipation fan 6, water cooling main pipe 7, water cooling auxiliary pipe 8, water cooling branch pipe 9, connecting rib 10, gap 11, heat dissipation strip hole 12 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A permanent magnet motor driver, characterized in that: The invention comprises a driver body (1), a cover plate (2) mounted in cooperation with the driver body (1), and a partition plate (3) located inside the driver body (1) and used for separation, wherein a plurality of heat dissipation fins (4) for improving heat dissipation efficiency are arranged on both front and rear sides of the driver body (1), and an installation cavity and a heat dissipation cavity are respectively formed in the driver body (1) through the partition plate (3); A heat dissipation fan (6) is arranged in the heat dissipation cavity and is used to improve the air circulation efficiency in the installation cavity and has a rapid heat dissipation effect; A ventilation grille (5) is provided in the middle of the partition (3) for rapid air circulation; A water cooling mechanism connected to the water pump body and used to improve heat dissipation efficiency is provided at the rear end of the heat dissipation fan (6), and the water cooling mechanism is connected to the water inlet and outlet of the water pump body, and forms a water flow loop through the water pressure when the water pump is working.

2. A permanent magnet motor driver according to claim 1, characterized in that: The water cooling mechanism comprises a water cooling main pipe (7) connected to a water inlet of a water pump, a water cooling sub-pipe (8) connected to a water outlet of the water pump, and a plurality of water cooling branch pipes (9); the water cooling main pipe (7) is connected to the water cooling sub-pipe via the plurality of water cooling branch pipes (9).

3. A permanent magnet motor driver according to claim 2, characterized in that: A connection unit for improving the connection strength and heat dissipation efficiency is wound around a plurality of the water-cooling branch pipes (9), and the connection unit is composed of a plurality of connection ribs (10); A permanent magnet motor driver according to claim 3, characterized in that the connecting rib (10) is wound around a plurality of water cooling branch pipes (9) in sequence and connected to two side walls inside the driver body (1).

4. A permanent magnet motor driver according to claim 4, characterized in that: The driver body is arranged in an open structure, the water-cooling auxiliary pipe (8) is arranged along the bottom of the cover plate (2) and penetrates into the driver body, and a gap (11) is provided between the partition plate (3) and the cover plate (2) for the water-cooling auxiliary pipe (8) to penetrate.

5. A permanent magnet motor driver according to claim 1, characterized in that: The cover plate (2) is provided with a plurality of heat dissipation strip holes (12) for rapid heat circulation and volatilization, and the plurality of heat dissipation strip holes (12) are sequentially arranged at intervals on the cover plate (2).

6. A permanent magnet motor driver according to claim 1, characterized in that: A plurality of heat dissipation fins (4) are sequentially arranged at intervals on the front and rear side walls of the driver body, and a copper sheet for improving heat dissipation efficiency is laid on the bottom of the installation cavity.

7. A permanent magnet motor drive control system, characterized in that: The invention comprises a driver body, a cooling water mechanism and a cooling fan (6) as claimed in claim 1; a temperature and humidity sensor is arranged in the driver body, a flow regulating valve is arranged in the water cooling mechanism, and a controller is arranged in the driver body; the temperature and humidity sensor and the flow regulating valve are electrically connected to the controller, and the water flow velocity in the water cooling mechanism and the wind speed of the cooling fan (6) can be controlled by the controller; the controller can synchronously adjust the water flow velocity in the water cooling mechanism and the wind speed of the cooling fan (6) according to the temperature and humidity sensor.

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