Constant-current discharge circuit and protection device
A constant current discharge and circuit technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems such as potential safety hazards and easily damaged relay contacts. Achieve the effect of improving safety and reliability
Pending Publication Date: 2020-05-19
BEIJING HUAFENG TEST & CONTROL TECH CO LTD
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- Application Information
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Problems solved by technology
[0004] Based on this, it is necessary to provide a constant current discharge circuit and protection device for the charge discharge of the energy storage capacitor, using a relay with a high-power resistor, which makes the relay contacts easy to damage and has potential safety hazards.
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[0050] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0051] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" an...
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The invention provides a constant-current discharge circuit and a protection device. The constant-current discharge circuit comprises a switching circuit, an absorption circuit, a constant-current source circuit, a voltage stabilizing circuit and a control switch circuit. The first end of the switching circuit is used for being electrically connected with the first end of a capacitor and a power supply. The first end of the absorption circuit is electrically connected with the second end of the switching circuit; and the second end of the absorption circuit and the second end of the capacitorare grounded. The first end of the constant-current source circuit is electrically connected with the first end of the switching circuit; and the second end of the constant-current source circuit is electrically connected with the third end of the switching circuit. The first end of the voltage stabilizing circuit is electrically connected with the third end of the switching circuit; and the second end of the voltage stabilizing circuit is electrically connected with the second end of the capacitor. The first end of the control switch circuit is electrically connected with the second end of the constant-current source circuit; and the second end of the control switch circuit is electrically connected with the second end of the voltage stabilizing circuit.
Description
technical field [0001] This application relates to the technical field of power electronics, in particular to a constant current discharge circuit and a protection device. Background technique [0002] In the high-power electronic system module, there will be a large-capacity energy storage capacitor as the energy source of the large pulse current. Under normal circumstances, this kind of functional module will have plugging and unplugging actions in the whole system. If the module’s own capacitance discharges for a long time, it may cause life-threatening personal contact, and the risk of damage to components when the module itself is plugged in and out. Therefore, it is necessary to quickly discharge the charge of the energy storage capacitor after shutdown and power failure, and the discharge is usually completed within 2S to 10S. [0003] In order to discharge the charge of the large-capacity energy storage capacitor, the current method is to connect high-power resistor...
Claims
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Login to View More IPC IPC(8): H02M1/32H02H9/04
CPCH02H9/041H02H9/042H02M1/32H02M1/322
Inventor 陈志博毛怀宇赵运坤
Owner BEIJING HUAFENG TEST & CONTROL TECH CO LTD