Load Test Power Circuit With Stored-Fan Cooling Continuity
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Solution Overview
Problem
Conventional load testing devices require a separate ancillary power source and may need to stop cooling fans during testing, which is inconvenient and inefficient.
Innovation Solution
A load testing device with a resistance unit, a cooling fan, a circuit breaker, and a charge/discharge unit that includes a charger and a power storage device, allowing the cooling fan to operate using stored power from the test target source, eliminating the need for an ancillary power source and enabling continuous operation even when the test target power is interrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional load testing device is used, then the load test can be performed, but an ancillary power source is required and cooling fans must be stopped during testing
Solution Approach 1:
The patent merges the test target power source with the power source for driving cooling fans and other electric equipment. The power storage device stores power from the test target power source, and both the resistance unit and electric equipment are powered from the same source, eliminating the need for separate ancillary power sources and allowing continuous operation during load testing.
Solution Approach 2:
The test target power source serves multiple functions: it powers both the resistance unit for load testing and the electric equipment (cooling fans, control units) that support the testing process. This multi-functional approach eliminates the need for dedicated ancillary power sources and allows the system to operate continuously during testing.
2Device complexity
If the test target power source is used to drive both the resistance unit and electric equipment, then no ancillary power source is needed, but power supply stability to the resistance unit may be affected
Solution Approach 1:
The power storage device stores power from the test target power source in advance. During load testing, the stored power is supplied to the electric equipment, ensuring that power supply to the resistance unit remains stable and uninterrupted, while electric equipment continues to operate reliably.
Solution Approach 2:
The patent segments the power distribution into two paths: one path supplies power from the test target power source directly to the resistance unit for load testing, and another path supplies stored power from the power storage device to the electric equipment. This segmentation ensures stable power supply to the resistance unit while maintaining reliable operation of supporting equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables load testing without an ancillary power source and prevents cooling fans from stopping, ensuring continuous operation of the load testing device's equipment, including the cooling fan, by using stored power from the charge/discharge unit.
Implementation Method 1
a first power storage device (45a) that stores electric power supplied from a test target power source
Implementation Method 2
a cooling fan (10) that cools the resistance unit (20)
Implementation Method 3
a resistance unit (20) to which electric power from the test target power source is supplied
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A load testing device capable of a load test without preparing an ancillary power source and without stopping a cooling fan and the like is provided. A load testing device 1 includes: a resistance unit 20; a cooling fan 10 that cools the resistance unit 20; a circuit breaker 50; a first terminal part 55a that is connected to a test target power source; and a charge/discharge unit 40 that has a charger 43 and a first power storage device 45a. The charge/discharge unit 40 is connected with a test target power source cable c1 being between the first terminal part 55a and the resistance unit 20, between the first terminal part 55a and the circuit breaker 50. The first power storage device 45a stores electric power supplied from the test target power source. The cooling fan 10 drives based on electric power from at least the charge/discharge unit 40.