Electronic loading device
An electronic load and load current technology, applied in the direction of measuring device, measuring electricity, adjusting electrical variables, etc., can solve the problems of activation time difference, action start time delay, interrupting load current, etc., and achieve the effect of high-speed load response characteristic test
Inactive Publication Date: 2004-10-13
KEISOKU GIKEN
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Problems solved by technology
This will be different due to the response speed of the load setting control loop of the electronic load and the activation time of the output voltage of the power supply under test. However, it will be a big problem in the electronic load of the known technology and the general power supply under test. That is, the terminal voltage of the electronic load is detected, and when the detected value is below a certain threshold voltage, the gate drive of the load transistor, which is invisible when the power supply of the power supply under test is turned off, is interrupted or reduced, and A device that activates the load current control loop when the voltage exceeds the critical value
Adding this circuit will delay the operation start time of the power supply under test, and will often interrupt the load current when the voltage is below the threshold value.
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[0073] Hereinafter, the implementation state of the present invention will be described with reference to the diagrams.
[0074] In order to avoid the description of the embodiment of the present application being too complicated, only the case of one load transistor will be described, but of course, the circuit including the load current control loop can be combined with multiple load transistors according to the necessary load current and load power Blocks are connected in parallel to achieve the required electronic load.
[0075] An embodiment described in claim 1, the basic circuit configuration of the electronic load device of the known technology is as follows: image 3 shown. The voltage difference output of the voltage V3 for load current control will pass through the resistor R10 and the voltage V4 for adjusting the offset (Offset), and the voltage output through the resistor R4 will be synthesized, connected to the single-side input of the operational amplifier A1, ...
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The present invention is provided to improve the frequency response characteristics of the load current for the tested power device of an electronic load apparatus. In the invention, impedance L1 is connected in series and attached to the source of transistor Q1 for load current control. In addition to improving the frequency response characteristic of the electronic load control loop and the electronic load transient response characteristics at the starting of the power supply to be tested, a better load current control characteristic is obtained in a wide load current range by providing a circuit device of a non-linear element between the input and output of an operational amplifier for the driving transistor of the controlling circuit.
Description
technical field [0001] The invention relates to an electronic load device used as a load such as a DC power supply device or a primary battery (cannot be used after discharge), a secondary battery (rechargeable and reusable), a fuel cell, etc., especially a test load current An electronic load device for the characteristics of the tested power supply that changes at a high speed. Background technique [0002] figure 1 It is an explanation of the circuit configuration example and operation principle of the electronic load device and the power supply under test in the known technology. The voltage output terminal of the power supply 2 under test is connected to the electronic load device 1 through the connecting cable 3, and the voltage Ein corresponding to the predetermined load current IL is set as the control voltage V1 for current setting, and the current setting is compared with the operational amplifier A1. Using the output of the control voltage V1 and the voltage of ...
Claims
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IPC IPC(8): G05F1/56G01R31/00G01R31/36G05F1/10
Inventor 似鸟宪治
Owner KEISOKU GIKEN