TWM458559U - Switching power supply test system - Google Patents

Abstract

A switching power supply test system is provided. The switching power supply test system comprises: a switching power supply, a repeat activating unit, a detecting unit, a power supply source and a load. With the switching power supply test system according to an embodiment of the present disclosure, repeated activations are performed via the repeat activating unit so as to detect a number of times of repeatable activation. Since prices of components of the system are low, a cost may be effectively saved and less time is required.

Description

Switching power supply test system

This creation relates to a switching power supply test system.

Switching power supplies, such as DC/DC converters, are one of the important components of a vehicle, and their performance indicators directly affect the performance of the vehicle. The DC/DC converter in an electric vehicle is a low-voltage electric appliance that converts the high voltage of the power battery into a low voltage and supplies the whole vehicle.

The switching power supply must be tested before it can be used. After the test is passed, it can be used. Take the DC/DC converter in the car as an example. The service life of the vehicle is generally 10 years. The number of starts per day is generally not more than ten times, that is, the inside of the vehicle. The number of repeated starts of the DC/DC converter is 36,000. Currently, the test for the service life of the switching power supply is generally a manual control switch test, or a test using a relatively expensive device, which is costly and time consuming.

This creation aims to address at least one of the above technical issues.

In view of the high test cost and long time taken by the manual control switch test for the service life of the switch power supply in the vehicle, the present invention proposes a switching power supply test system, which can effectively save cost and is short in time.

A switching power supply testing system, the switching power supply testing system includes: a switching power supply, the switching power supply includes an input end and an output end; and a repeating start unit for controlling the repeated starting of the switching power supply and determining whether the switching power supply is working normally The repeating start unit includes a first end and a second end, and an input end of the switching power supply is connected to a second end of the repeating start unit; a detecting unit for detecting whether the switching power source has an output, the detecting unit is connected to an output end of the switching power supply, the detecting unit is connected to the repeating starting unit, and a power supply source for supplying electric energy, the repeating A first end of the startup unit is coupled to the power supply; and a load coupled to an output of the switching power supply.

Further, the repeating start unit includes: a relay for controlling the switching power supply test system to be turned on and off, and the input end and the output end of the relay are respectively the first end and the second end of the repeating start unit, An input of the relay is connected to the power supply, an output of the relay is connected to the switching power supply; and a controller for counting and controlling the opening and closing of the relay, the controller and the controller Relays are connected and the controller is also connected to the detection unit.

Further, the controller is a PIC18F248 microcontroller.

Further, the detecting unit is a current sensor, and the current sensor is connected to the controller.

Further, the switching power supply testing system further includes: an incubator for maintaining an operating temperature, the switching power supply being disposed in the thermostat.

Further, the switching power supply testing system further includes: a water tank for holding cooling water, the switching power source is provided with a cooling water channel, and the water tank is connected to a cooling water channel of the switching power source.

Further, the switching power supply testing system further includes: a display for displaying an operating state of the switching power supply, the display being connected to the controller.

The present invention provides a switching power supply test system that repeatedly tests the number of repeatable starts of the switching power supply by repeating the start-up unit, and the component price is low, which can effectively save costs and is short in time.

Additional aspects and advantages of the present invention will be set forth in part in the description which follows.

1‧‧‧Power supply

2‧‧‧Repeated starter unit

3‧‧‧load

4‧‧‧Switching power supply

5‧‧‧ incubator

6‧‧‧Water tank

7‧‧‧Detection unit

8‧‧‧ display

21‧‧‧ Controller

22‧‧‧ Relay

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings in which: FIG. 1 is a schematic structural diagram of a switching power supply testing system provided by the present invention.

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

As shown in FIG. 1 , a switching power supply testing system includes a switching power supply 4, a repeated starting unit 2 for controlling the repeated activation of the switching power supply 4, and determining whether the switching power supply 4 is working normally, and detecting whether the switching power supply has an output. a unit 7, a power supply 1 for supplying electric energy, and a load 3. The switching power supply 4 includes an input end and an output end. The repeat start unit 2 includes a first end and a second end, and the input end of the switching power supply 4 and the repeating start unit 2 The second end is connected, the first end of the repeating start unit 2 is connected to the power supply 1, the detecting unit 7 is connected to the output end of the switching power supply 4, the load 3 is connected to the output end of the switching power supply 4, the detecting unit 7 and the repeating starting unit 2 Connected.

The repeating start unit 2 includes a relay 22 for controlling the on and off of the system, and a controller 21 for counting and controlling the opening and closing of the relay 22. The controller 21 is connected to the relay 22, and the 22 input and output of the relay are respectively The first end and the second end of the start unit 2 are repeated, the input end of the relay 22 is connected to the power supply 1, the output end of the relay 22 is connected to the switching power supply 4, the controller 21 is also connected to the detecting unit 7, and the controller 21 uses the PIC18F248. Single chip microcomputer.

Preferably, the detecting unit 7 employs a current sensor, and the current sensor is connected to the controller 21, and the current sensor transmits the detected current to the controller 21.

The switching power supply test system further includes an incubator 5 for maintaining the operating temperature. The switching power supply 1 is disposed in the thermostat, and the switching power supply 1 can be tested at a set temperature by adjusting the temperature of the thermostat.

The switching power supply test system further includes a water tank 6 for holding cooling water, and the switching power supply 1 is internally provided with cold However, the water tank 6 is connected to the cooling water passage of the switching power supply 1, and the heat generated by the switching power supply 1 during the test can be taken away by the cooling water.

The switching power supply test system also includes a display 8 for displaying the operating state of the switching power supply, the display 8 being coupled to the controller 1.

The present invention is further illustrated by the following specific examples.

The switching power supply 4 uses a DC/DC converter, and the power supply 1 uses a DC power supply.

The controller 1 is internally provided with a counter, sets the number of times the system is repeatedly started, for example, 36,000 times, and sets the start time Ton and the off time Toff of the DC/DC converter, and sets the temperature of the oven 5 to be the highest of the DC/DC converter. The operating temperature, the temperature of the cooling water of the water tank 6 is set to the highest temperature of the DC/DC converter, the DC power output voltage is set to the rated voltage of the DC/DC converter, the DC power is turned on, the relay 22 is pulled in, and the system starts to work.

After working for a period of time Ton, the controller 1 controls the relay 22 to be turned off. After a period of time Toff, the controller 1 controls the relay 22 to pull in, and so on. If the output of the DC/DC converter is normal, the current sensor will The current signal is transmitted to the controller 1. When the DC/DC output is normal, the relay 22 is deducted once every time, the counter inside the controller 1 is decremented by 1, and the controller 1 controls the display state of the display 8 to be "normal". And the remaining number of starts is displayed. When the remaining number of times is displayed as 0, that is, the DC/DC converter has been repeatedly activated 36,000 times, at this time, the controller 1 maintains the relay 22 in the pull-in state, and the display on the display 8 is qualified.

If the DC/DC converter is abnormal during the test, usually no output, the current sensor detects that the DC/DC converter has no output current, the controller 1 controls the display 8 to display the operating state as "output undervoltage". And record the number of times that have been activated at this time, and consider the product to be unqualified.

Heat is generated during the testing of the DC/DC converter, and the cooling water in the water tank flows through the cooling water passage inside the DC/DC converter to remove heat.

The switching power supply test system provided by the present invention tests the number of repeatable starts of the switching power supply by repeatedly starting the unit and repeating the start-up unit. The repeating start unit has a simple structure and a unit. The price is low, which can save costs and is short-lived.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this creation should be included in the scope of creation. within.

1‧‧‧Power supply

2‧‧‧Repeated starter unit

3‧‧‧load

4‧‧‧Switching power supply

5‧‧‧ incubator

6‧‧‧Water tank

7‧‧‧Detection unit

8‧‧‧ display

21‧‧‧ Controller

22‧‧‧ Relay

Claims (7)

A switching power supply testing system, characterized in that the switching power supply testing system comprises: a switching power supply, the switching power supply comprises an input end and an output end; and is configured to control the switching power supply to repeatedly start and determine whether the switching power supply works normally Repeating start unit, the repeating start unit includes a first end and a second end, the input end of the switching power supply is connected to the second end of the repeating start unit; and detecting whether the switching power supply has an output a unit, the detecting unit is connected to an output end of the switching power supply, the detecting unit is connected to the repeating starting unit, a power supply for supplying electric energy, a first end of the repeating starting unit and the power supply Connected; and a load connected to the output of the switching power supply. The switching power supply testing system of claim 1, wherein the repeating starting unit comprises: a relay for controlling the switching power supply test system to be turned on and off, the input end and the output end of the relay respectively For the first end and the second end of the repeating start unit, an input end of the relay is connected to the power supply, an output of the relay is connected to the switching power supply; and is used for counting and controlling the relay A controller that pulls in and disconnects, the controller is coupled to the relay, and the controller is further coupled to the detecting unit. The switching power supply testing system of claim 2, wherein the controller is a PIC18F248 microcontroller. The switching power supply testing system of claim 2, wherein the detecting unit is a current sensor, and the current sensor is connected to the controller. The switching power supply testing system according to claim 1, wherein the switch The power test system further includes an incubator for maintaining an operating temperature, the switching power source being disposed in the incubator. The switching power supply testing system of claim 1, wherein the switching power supply testing system further comprises: a water tank for holding cooling water, the switching power supply is provided with a cooling water channel, and the water tank is The cooling water channels of the switching power supply are connected. The switching power supply testing system of claim 2, wherein the switching power supply testing system further comprises: a display for displaying an operating state of the switching power supply, the display being connected to the controller.