阅读说明：本技术 矿用电传动自卸车永磁电机散热控制系统 (Heat dissipation control system for permanent magnet motor of mining electric drive dumper ) 是由 李宗� 房康宁 张亮 张莉 张媛媛 张亚鹏 王冠 李斌 毛家松 王点 于 2019-11-07 设计创作，主要内容包括：矿用电传动自卸车永磁电机散热控制系统,其中的散热水箱出水口通过水泵与永磁机组进水口相连,永磁机组出水口与散热水箱进水口相连；其中,水泵由电机Ⅱ驱动,散热水箱由电机Ⅰ驱动；水温传感器Ⅰ安装在永磁机组进水口处,用以监测与永磁机组进水温度,水温传感器Ⅱ安装在永磁机组出水口处,用以监测与永磁机组出水温度；水温传感器Ⅰ、水温传感器Ⅱ分别与控制器输入端电连接,控制器输出端分别与电机Ⅰ、电机Ⅱ电连接,控制器根据水温传感器Ⅰ的温度调节电机Ⅱ转速；控制器根据水温传感器Ⅰ和水温传感器Ⅱ的温度调节电机Ⅰ的转速。本发明可实现对电机的有效散热,且散热能力大小根据水温可以自动可调,散热效率高,控制简单,可靠性高。(The permanent magnet motor heat dissipation control system for the mining electric drive dumper is characterized in that a water outlet of a heat dissipation water tank is connected with a water inlet of a permanent magnet unit through a water pump, and the water outlet of the permanent magnet unit is connected with the water inlet of the heat dissipation water tank; the water pump is driven by a motor II, and the heat dissipation water tank is driven by a motor I; the water temperature sensor I is arranged at a water inlet of the permanent magnet unit and used for monitoring the water inlet temperature of the permanent magnet unit, and the water temperature sensor II is arranged at a water outlet of the permanent magnet unit and used for monitoring the water outlet temperature of the permanent magnet unit; the water temperature sensor I and the water temperature sensor II are respectively and electrically connected with the input end of the controller, the output end of the controller is respectively and electrically connected with the motor I and the motor II, and the controller adjusts the rotating speed of the motor II according to the temperature of the water temperature sensor I; the controller adjusts the rotating speed of the motor I according to the temperatures of the water temperature sensor I and the water temperature sensor II. The invention can realize effective heat dissipation of the motor, the heat dissipation capacity can be automatically adjusted according to the water temperature, the heat dissipation efficiency is high, the control is simple, and the reliability is high.)

1. Mining electricity transmission tipper permanent-magnet machine heat dissipation control system, its characterized in that: the water heater comprises a heat dissipation water tank, a motor I, a motor II, a water temperature sensor I, a water temperature sensor II, a permanent magnet unit and a controller;

the water outlet of the heat dissipation water tank is connected with the water inlet of the permanent magnet unit through a water pump, and the water outlet of the permanent magnet unit is connected with the water inlet of the heat dissipation water tank;

the water pump is driven by a motor II, and the heat dissipation water tank is driven by a motor I;

the water temperature sensor I is arranged at a water inlet of the permanent magnet unit and used for monitoring the temperature of water entering the permanent magnet unit, and the water temperature sensor II is arranged at a water outlet of the permanent magnet unit and used for monitoring the temperature of water exiting the permanent magnet unit;

the water temperature sensor I and the water temperature sensor II are respectively and electrically connected with the input end of the controller, the output end of the controller is respectively and electrically connected with the motor I and the motor II, and the controller adjusts the rotating speed of the motor II according to the temperature of the water temperature sensor I; the controller adjusts the rotating speed of the motor I according to the temperatures of the water temperature sensor I and the water temperature sensor II.

2. The mining electric drive dumper permanent magnet motor heat dissipation control system according to claim 1, characterized in that: the permanent magnet unit comprises a permanent magnet motor I, a permanent magnet motor II and a permanent magnet generator which are connected in parallel.

3. The mining electric drive dumper permanent magnet motor heat dissipation control system according to claim 1, characterized in that: the water temperature sensor I and the water temperature sensor II are resistance type sensors.

4. The mining electric drive dumper permanent magnet motor heat dissipation control system according to claim 1, characterized in that: when the monitoring temperature of the water temperature sensor I is higher than a set threshold value, the controller sends out an alarm signal.

5. The mining electric drive dumper permanent magnet motor heat dissipation control system according to claim 1, characterized in that: and when the monitoring temperature difference value of the water temperature sensor I and the water temperature sensor II is smaller than a set threshold value, the controller sends out an alarm signal.

6. The mining electric drive dumper permanent magnet motor heat dissipation control system according to claim 1, characterized in that: the heat dissipation water tank comprises an expansion water tank and a fan; wherein, the fan is driven by motor I.

Technical Field

The invention relates to a motor cooling system, in particular to a heat dissipation control system for a permanent magnet motor of a mining electric drive dumper, and belongs to the technical field of cooling control.

Background

With the development of motors and control technologies, more and more large-scale mining equipment adopts an electric transmission mode, and the large-scale mining equipment comprises an electric excavator, an electric shovel, an electric loader and a mining electric transmission dump truck. Especially, the electric transmission mine car has absolute advantages in the aspect of large-scale mine, mountain, earth and stone transportation. The driving system is simple, the control characteristic of the engine is fully utilized, the rotating speed and the power of the engine are always kept to be optimal, so that the energy consumption of the mining electric vehicle can be reduced to the maximum extent, and the transportation efficiency is improved. At present, engineering machinery manufacturers are all researching and developing mining electric drive dump trucks. Compared with a mechanical transmission dumper, the electric transmission dumper has the advantages of simple structure, convenience in maintenance, great reduction in operation cost and improvement in production efficiency.

Compared with an alternating current asynchronous motor and a direct current motor, the permanent magnet motor has many advantages in the aspects of control, structure, energy efficiency, reliability and the like. The rare earth resources in China are rich, the advantage can be fully utilized, the advantages of the permanent magnet motor are brought into play, and the permanent magnet motor is used for running vehicles. The permanent magnet motor fixes the permanent magnet on the motor stator, a totally closed structure is required, an air cooling mode cannot be adopted, and the current mainstream cooling mode is water cooling. If the water pump adopts constant rotating speed and the heat dissipation water tank adopts constant heat dissipation power, the energy consumption of the whole vehicle can be increased, and the heat dissipation of the motor can be ensured while the energy consumption of the vehicle can be reduced by adopting the mode that the rotating speed of the water pump is adjustable and the heat dissipation power is adjustable.

Disclosure of Invention

Aiming at the existing problems, the invention provides the heat dissipation control system for the permanent magnet motor of the mining electric drive dumper, which can realize effective heat dissipation of the motor, has the advantages of automatically adjustable heat dissipation capacity according to the water temperature, high heat dissipation efficiency, simple control and high reliability.

In order to achieve the purpose, the invention adopts the technical scheme that:

a mining electric drive dumper permanent magnet motor heat dissipation control system comprises a heat dissipation water tank, a motor I, a motor II, a water temperature sensor I, a water temperature sensor II, a permanent magnet unit and a controller; the water outlet of the heat dissipation water tank is connected with the water inlet of the permanent magnet unit through a water pump, and the water outlet of the permanent magnet unit is connected with the water inlet of the heat dissipation water tank; the water pump is driven by a motor II, and the heat dissipation water tank is driven by a motor I; the water temperature sensor I is arranged at a water inlet of the permanent magnet unit and used for monitoring the temperature of water entering the permanent magnet unit, and the water temperature sensor II is arranged at a water outlet of the permanent magnet unit and used for monitoring the temperature of water exiting the permanent magnet unit; the water temperature sensor I and the water temperature sensor II are respectively and electrically connected with the input end of the controller, the output end of the controller is respectively and electrically connected with the motor I and the motor II, and the controller adjusts the rotating speed of the motor II according to the temperature of the water temperature sensor I; the controller adjusts the rotating speed of the motor I according to the temperatures of the water temperature sensor I and the water temperature sensor II.

Furthermore, the permanent magnet unit comprises a permanent magnet motor I, a permanent magnet motor II and a permanent magnet generator which are connected in parallel.

Furthermore, the water temperature sensor I and the water temperature sensor II are resistance type sensors.

Further, when the monitoring temperature of the water temperature sensor I is higher than a set threshold value, the controller sends out an alarm signal.

Further, when the monitoring temperature difference value of the water temperature sensor I and the water temperature sensor II is smaller than a set threshold value, the controller sends out an alarm signal.

Further, the heat dissipation water tank comprises an expansion water tank and a fan; wherein, the fan is driven by motor I.

Compared with the prior art, the invention has the following characteristics:

1. the rotating speed of the water pump is adjustable according to the temperature of the water inlet; 2. The heat dissipation power of the heat dissipation water tank is adjustable according to the temperature difference between the water outlet and the water inlet; 3. the heat dissipation system has low power consumption; 4. the heat dissipation capacity is flexibly adjusted according to the water temperature, and the applicability is strong.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. The present invention will be described in detail below with reference to the accompanying drawings and examples.

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a control schematic diagram of the motor i and the motor ii in fig. 1.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the mining electric drive dumper permanent magnet motor heat dissipation control system comprises a heat dissipation water tank 10, a motor i 20, a motor ii 30, a water temperature sensor i 80, a water temperature sensor ii 90, a permanent magnet unit and a controller 70; the water outlet of the heat dissipation water tank 10 is connected with the water inlet of the permanent magnet unit through a water pump 100, and the water outlet of the permanent magnet unit is connected with the water inlet of the heat dissipation water tank 10; wherein, the water pump 100 is driven by the motor II 30, and the heat radiation water tank 10 is driven by the motor I20; the water temperature sensor I80 is arranged at a water inlet of the permanent magnet unit and used for monitoring the water inlet temperature of the permanent magnet unit, and the water temperature sensor II 90 is arranged at a water outlet of the permanent magnet unit and used for monitoring the water outlet temperature of the permanent magnet unit; the water temperature sensor I80 and the water temperature sensor II 90 are respectively and electrically connected with the input end of the controller 70, the output end of the controller 70 is respectively and electrically connected with the motor I20 and the motor II 30, and the controller 70 adjusts the rotating speed of the motor II 30 according to the temperature of the water temperature sensor I80 and controls the flow of the heat dissipation water channel; the controller 70 adjusts the rotating speed of the motor I20 according to the temperatures of the water temperature sensor I80 and the water temperature sensor II 90, and improves the heat dissipation power.

Further scheme: the permanent magnet unit comprises a permanent magnet motor I40, a permanent magnet motor II 50 and a permanent magnet generator 60 which are connected in parallel.

The water temperature sensor I80 and the water temperature sensor II 90 are resistance type sensors.

When the monitored temperature of the water temperature sensor I80 is higher than a set threshold value, the controller 70 sends out an alarm signal.

When the monitoring temperature difference value between the water temperature sensor I80 and the water temperature sensor II 90 is smaller than a set threshold value, the controller 70 sends out an alarm signal.

The heat radiation water tank 10 includes an expansion water tank and a fan; wherein the fan is driven by a motor I20.

The working process is as follows:

the invention adopts two water temperature sensors to monitor the water temperatures of the water inlets and the water outlets of the permanent magnet motor I40, the permanent magnet motor II 5 and the permanent magnet generator 60 in real time, the water temperatures of the two water temperature sensors are used as input signals of the controller 70, if the water inlet temperature measured value of the water temperature sensor I80 is higher than a set threshold value, the rotating speed of the motor II 30 is increased, the flow of a water channel is increased, the heat dissipation capacity is enhanced, and if the rotating speed of the motor II 30 reaches the maximum value, the rotating speed of the motor I20 is increased, and the heat dissipation; if the temperature difference between the water temperature sensor I80 and the water temperature sensor II 90 is smaller than a set threshold value, the rotating speed of the motor I20 is increased, and the heat dissipation power is improved. The two motors are matched to control the cooling system, so that the maximum heat dissipation capacity of each motor at the rotating speed can be fully utilized, the heat dissipation efficiency is improved, and the power loss of the whole vehicle is reduced.

In the working process, the function f (x) calculates the rotating speed of the motor II according to the input of the water temperature sensor I, and the rotating speed of the motor II is adjusted through the controller; and the function f (x, y) calculates the rotating speed of the motor I according to the input of the water temperature sensor I and the water temperature sensor II, and the rotating speed of the motor I is regulated through the controller. If the rotating speeds of the motor I and the motor II reach the maximum, the temperature of the water temperature sensor I is higher than an allowable value or the difference value between the water temperature sensor I and the water temperature sensor II is smaller than the allowable value, and the controller sends out an alarm signal.

In conclusion, the rotating speed and the flow of the water pump motor are adjusted in real time according to the water temperature, the heat dissipation power is adjusted according to the temperatures of the water inlet and the water outlet of the permanent magnet motor, the controllability of the heat dissipation capacity of the system is strong, the power loss of the vehicle is reduced, and the purpose of energy conservation is achieved.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.