JP5593789B2 - Dynamo cooling water control system - Google Patents

Description

  The present invention relates to a dynamo cooling water control system that controls cooling water used for cooling a dynamo.

  Conventionally, the following is known as a system for cooling a dynamo used in a power test apparatus.

  A dynamo cooling system 101 described in Patent Document 1 is shown in FIG. This dynamo cooling system 101 includes a dynamo 11, a pump 13 that supplies dynamo cooling oil C2 to the dynamo 11, a heat exchanger 15 that performs heat exchange between the dynamo cooling oil C2 and the cooling water C1 (primary cooling water), The cooling water supply source 21 that supplies the cooling water C1 to the heat exchanger 15 and the valve 123 that is disposed between the cooling water supply source 21 and the heat exchanger 15 are provided. The cooling water C1 that has passed through the heat exchanger 15 is drained.

  Moreover, the dynamo cooling water control system 201 described in Patent Document 2 is shown in FIG. In this dynamo cooling water control system 201, the temperature of the dynamo cooling oil C2 is measured. When the temperature of the dynamo cooling oil C2 is higher than the reference temperature, the electric valve 23 is opened, and the cooling water C1 is allowed to flow from the cooling water supply source 21 to the heat exchanger 15. Further, when the temperature of the dynamo cooling oil C2 is lower than the reference temperature, the electric valve 23 is closed and the cooling water supply source 21 and the heat exchanger 15 are shut off. Thereby, the usage-amount of the cooling water C1 is suppressed.

JP 2007-215307 A JP 2004-248402 A (page 11 to page 12 (seventh embodiment), page 20 (FIGS. 11 and 13))

  However, the above technique has the following problems.

  As with the dynamo cooling system 101 shown in FIG. 2 (the dynamo cooling system described in Patent Document 1), the cooling water supply source (21) to the heat exchanger (15) is constant regardless of the load status of the dynamo (11). In the technique for supplying the primary cooling water (C1) in an amount, the primary cooling water (C1) is wasted.

  Moreover, like the dynamo cooling water control system 201 shown in FIG. 3 (the dynamo cooling water control system described in Patent Document 2), the supply of the primary side cooling water (C1) according to the temperature of the cooling fluid (dynamo cooling oil C2). In the technology for controlling the temperature, waste of the primary side cooling water (C1) can be suppressed. However, in order to measure the temperature of the cooling fluid (dynamo cooling oil C2), it is necessary to provide a temperature sensor. As a result, it takes time to install the temperature sensor. Moreover, the cost of a temperature sensor starts.

  Further, in the dynamo cooling water control system 201, the temperature of the reference temperature and the cooling fluid are compared after the temperature fluctuation of the dynamo (11). Therefore, the opening / closing of the valve (123) may not follow the temperature change of the dynamo (11).

  The objective of this invention is providing the dynamo cooling water control system which can suppress the usage-amount of a primary side cooling water, without requiring a temperature sensor.

  The dynamo cooling water control system according to the present invention includes a pump that supplies a cooling fluid to a dynamo, a heat exchanger that performs heat exchange between the cooling fluid and a primary cooling water, and the primary cooling water in the heat exchanger. A cooling water supply source that supplies the valve, a valve that is disposed between the cooling water supply source and the heat exchanger, and an arithmetic device that converts torque and rotation speed values of the dynamo into dynamo heat. . When the dynamo heat quantity is higher than the reference heat quantity, the primary side cooling water is supplied from the cooling water supply source to the heat exchanger by opening the valve. When the dynamo heat amount is lower than the reference heat amount, the valve is closed, and the supply amount of the primary side cooling water from the cooling water supply source to the heat exchanger is reduced compared to the case where the dynamo heat amount is higher than the reference heat amount. Let

  In this dynamo cooling water control system, when the dynamo heat quantity is lower than the reference heat quantity, the valve is closed. And the supply amount of the primary side cooling water from a cooling water supply source to a heat exchanger is decreased rather than the case where a dynamo heat amount is higher than a reference | standard heat amount. Therefore, the usage-amount of primary side cooling water when a dynamo calorie | heat amount is lower than a reference | standard calorie | heat amount can be suppressed.

  The dynamo cooling water control system includes an arithmetic unit that converts dynamo torque and rotation speed values into dynamo heat. Then, the supply amount of the primary side cooling water from the cooling water supply source to the heat exchanger is switched according to whether the dynamo heat amount is higher or lower than the reference heat amount. Therefore, it is not necessary to measure the temperature of the cooling fluid that cools the dynamo for this switching. Therefore, there is no need to provide a temperature sensor for measuring this temperature.

  Further, the dynamo heat quantity can be measured in real time from the values of the dynamo torque and the rotational speed. Therefore, the degree of opening and closing of the valve can be controlled without delay from the change in the dynamo heat amount (following the change in the dynamo heat amount).

  Furthermore, when a dynamo is used in a power test apparatus, the dynamo torque and the number of revolutions are always measured. Therefore, in this case, there is no need to separately provide a device for measuring the torque and rotation speed values. Therefore, in this case, the dynamo cooling water control system can be easily configured.

  As described in the above description, the present invention particularly includes an arithmetic unit that converts dynamo torque and rotational speed values into dynamo heat quantity, and when the dynamo heat quantity is higher than the reference calorie quantity, the valve is opened to open the primary side cooling water. Is supplied to the heat exchanger, and when the dynamo heat amount is lower than the reference heat amount, the valve is closed to reduce the supply amount of the primary side cooling water. Therefore, the usage amount of the primary side cooling water can be suppressed without requiring a temperature sensor.

This is a dynamo cooling water control system. It is a conventional dynamo cooling system. This is a conventional dynamo cooling water control system.

  Hereinafter, the configuration of the dynamo cooling water control system 1 according to the present invention will be described in detail with reference to FIG.

  The dynamo cooling water control system 1 is a system that cools the dynamo 11 using dynamo cooling oil C2 (cooling fluid) and cooling water C1 (primary cooling water), and is a system that controls the flow of the cooling water C1. . This dynamo cooling water control system 1 includes a dynamo 11, a pump 13 that supplies dynamo cooling oil C2 to the dynamo 11, a heat exchanger 15 that performs heat exchange between the dynamo cooling oil C2 and the cooling water C1, and a heat exchanger. 15, a cooling water supply source 21 for supplying the cooling water C 1, an electric valve 23 arranged between the cooling water supply source 21 and the heat exchanger 15, and a torque T and a rotational speed N of the dynamo output from the dynamo 11. A torque meter 31 for measuring values and an arithmetic device 32 for converting these values into dynamo heat P are provided.

  The dynamo 11 is a power / electric power converter used in a power test for measuring torque, rotation speed, and the like. That is, the dynamo 11 is rotated by the power of the test object to generate electric power, or the electric power supplied to the dynamo 11 is converted into power to rotate the test object. This dynamo 11 is cooled by dynamo cooling oil C2 because the coil is particularly hot.

  The dynamo cooling oil C2 (cooling fluid) is a fluid that cools the dynamo 11. In addition, you may use LLC (Long Life Coolant) instead of cooling oil.

  The pump 13 supplies the dynamo 11 with dynamo cooling oil C2. The pump 13 is disposed between the dynamo 11 and the heat exchanger 15. Then, the dynamo cooling oil C2 is sucked from the dynamo 11 through the flow path 12, and the dynamo cooling oil C2 is supplied to the dynamo through the flow path 14, the heat exchanger 15, and the flow path 16.

  The heat exchanger 15 performs heat exchange between the dynamo cooling oil C2 and the cooling water C1. The heat exchanger 15 is connected to the pump 13 via the flow path 14 and is connected to the dynamo via the flow path 16. Further, the cooling water C <b> 1 connected to the electric valve 23 via the flow path 24 and passing through the heat exchanger 15 is drained via the flow path 26.

  The cooling water supply source 21 supplies the cooling water C <b> 1 to the heat exchanger 15. More specifically, the cooling water C <b> 1 is supplied to the heat exchanger 15 through the flow path 22, the electric valve 23, and the flow path 24.

  The electric valve 23 (valve) is a valve disposed between the cooling water supply source 21 and the heat exchanger 15. More specifically, the electric valve 23 is connected to the cooling water supply source 21 via the flow path 22 and is connected to the heat exchanger 15 via the flow path 24. The electric valve 23 switches the supply amount of the cooling water C <b> 1 from the cooling water supply source 21 to the heat exchanger 15. In addition, as an opening / closing method of the electric valve 23, ON / OFF control may be used, or PID control in which the opening / closing amount is adjusted according to the required amount of cooling water may be used. Details of the operation of the electric valve 23 will be described later.

  The torque meter 31 is a device that measures the torque T and the rotational speed N from the dynamo output of the dynamo 11. The torque meter 31 is a device that is attached to a rotating shaft (not shown) of the dynamo 11, and is always provided in a test device that uses the dynamo 11. That is, it is not a device separately attached for controlling the cooling water C1.

The arithmetic device 32 is a device that converts the values of the torque T and the rotational speed N of the dynamo 11 into a dynamo heat amount P (also dynamo power consumption). Specifically, it is converted by the following calculation formula.
P [W] = F [N] × S [m / s] = T [N · m] × N [rpm] × 2π / 60
Here, P [W] is the dynamo heat quantity, F [N] is the force, S [m / s] is the speed, T [N · m] is the torque of the dynamo 11, and N [rpm] is the rotation speed of the dynamo 11. is there.

The dynamo heat P derived by the above calculation formula is also the power consumption of the dynamo. That is, the equation of P [W] = I ² [A] × R [Ω] is established from Joule's law. Therefore, instead of measuring the torque T and the rotational speed N of the dynamo 11, the dynamo power consumption P may be measured with a power meter (not shown).

(Operation of Dynamo Cooling Water Control System 1)
Next, the operation of the dynamo cooling water control system 1 will be described.
When the dynamo heat amount P is higher than the reference heat amount, the electric valve 23 is opened. Thereby, the dynamo cooling water control system 1 operates as follows. Cooling water C <b> 1 is supplied from the cooling water supply source 21 to the heat exchanger 15 through the flow path 22, the electric valve 23, and the flow path 24. The heat exchanger 15 performs heat exchange between the cooling water C1 and the dynamo cooling oil C2, and the dynamo cooling oil C2 is cooled. The cooled dynamo cooling oil C2 is supplied to the dynamo 11 by the pump 13 via the flow path 16. Thereby, the dynamo 11 is cooled.

  When the dynamo heat amount P is lower than the reference heat amount, the electric valve 23 is closed. And the quantity of the cooling water C1 supplied to the heat exchanger 15 from the cooling water supply source 21 is decreased rather than the above case (when the dynamo heat quantity P is higher than the reference heat quantity). The electric valve 23 may be completely closed to block between the cooling water supply source 21 and the heat exchanger 15, more specifically between the flow path 22 and the flow path 24. Thereby, when the load of the dynamo 11 is light (when the necessity of cooling the dynamo 11 is low), the usage-amount of the cooling water C1 can be suppressed.

  In addition, when the temperature of the cooling water C1 is low, the amount of the cooling water C1 supplied to the heat exchanger 15 may be smaller than when the temperature of the cooling water C1 is high (even if the amount of the cooling water C1 is small). The dynamo 11 can be sufficiently cooled). Therefore, when the temperature of the cooling water C1 is low, it is preferable to reduce the opening of the electric valve 23. Thereby, the usage-amount of the cooling water C1 can further be suppressed.

(Features of the dynamo cooling water control system of this embodiment)
The dynamo cooling water control system 1 of this embodiment has the following features.

  In this dynamo cooling water control system 1, when the dynamo heat amount P is higher than the reference heat amount, the electric valve 23 is opened. And dynamo cooling oil C2 is cooled by supplying the cooling water C1 from the cooling water supply source 21 to the heat exchanger 15. The dynamo 11 is cooled by supplying the dynamo cooling oil C2 to the dynamo 11 by the pump 13.

  In the dynamo cooling water control system 1, when the dynamo heat amount P is lower than the reference heat amount, the electric valve 23 (valve) is closed. And supply_amount | feed_rate of the cooling water C1 (primary side cooling water) from the cooling water supply source 21 to the heat exchanger 15 is decreased rather than the case where the dynamo heat amount P is higher than the reference | standard heat amount. Therefore, the usage-amount of the cooling water C1 when the dynamo calorie | heat amount P is lower than a reference | standard calorie | heat amount can be suppressed.

  The dynamo cooling water control system 1 includes an arithmetic device 32 that converts the values of the torque T and the rotational speed N of the dynamo 11 into a dynamo heat quantity P. Then, the supply amount of the cooling water C1 from the cooling water supply source 21 to the heat exchanger 15 is switched according to whether the dynamo heat amount P is higher or lower than the reference heat amount. Therefore, it is not necessary to measure the temperature of the dynamo cooling oil C2 for this switching. Therefore, there is no need to provide a temperature sensor for measuring this temperature.

  Further, the dynamo heat quantity P can be measured in real time from the values of the torque T and the rotational speed N of the dynamo 11. Therefore, the opening / closing degree of the electric valve 23 can be controlled without delay from the change in the dynamo heat amount P (following the change in the dynamo heat amount P).

  Furthermore, since the dynamo 11 is used in a power test apparatus, the torque T and the rotational speed N of the dynamo 11 are always measured by the torque meter 31 (test is performed to measure the torque T and the rotational speed N). Therefore, it is not necessary to separately provide a device for measuring the values of the torque T and the rotational speed N. Therefore, the dynamo cooling water control system 1 can be easily configured.

  As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

  For example, in the above embodiment, the electric valve 23 is used as a valve, but it can be changed to another valve. In other words, the present invention can be applied to other valves as long as the valve body opens and closes as a result of being instructed to open and close by an electric signal. For example, the electric valve 23 may be an electromagnetic valve.

  Further, for example, FIG. 1 shows that the dynamo heat quantity P and the reference heat quantity are compared with each other in a block different from the calculation device 32, but the present invention is applied even if this comparison is performed in the calculation device 32. it can.

1 Dynamo Cooling Water Control System 11 Dynamo 15 Heat Exchanger 21 Cooling Water Supply Source 23 Electric Valve (Valve)
32 Arithmetic unit C1 Cooling water (primary side cooling water)
C2 Dynamo cooling oil (cooling fluid)

Claims (2)

A pump for supplying cooling fluid to the dynamo;
A heat exchanger for performing heat exchange between the cooling fluid and the primary side cooling water;
A cooling water supply source for supplying the primary side cooling water to the heat exchanger;
A valve disposed between the cooling water supply source and the heat exchanger;
An arithmetic device for converting the value of the torque and the rotational speed of the dynamo into dynamo heat,
With
When the dynamo heat amount is higher than the reference heat amount, the primary side cooling water is supplied from the cooling water supply source to the heat exchanger by opening the valve,
When the dynamo heat amount is lower than the reference heat amount, the valve is closed, and the supply amount of the primary side cooling water from the cooling water supply source to the heat exchanger is reduced compared to the case where the dynamo heat amount is higher than the reference heat amount. Let dynamo cooling water control system. When the dynamo torque is T [N · m], the dynamo rotational speed is N [rpm], and the dynamo heat quantity is P [W], the arithmetic unit is P = T × N × 2π / 60 The dynamo cooling water control system according to claim 1 which performs conversion.

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