A battery-less alternator and its undervoltage protection device
A technology of alternator and undervoltage protection, which is applied to emergency protection circuit devices, electromechanical devices, electrical components, etc., and can solve problems such as burning, fire, and overcurrent of external wires
Active Publication Date: 2018-06-26
PRESTOLITE ELECTRIC BEIJING
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Problems solved by technology
During use, the on-board battery continues to provide excitation current for the non-battery generator to ensure the normal power supply of the generator. However, due to the loss of monitoring of the output voltage of the generator, once the output of the generator is abnormal, such as short circuit to ground, load Due to the continuous excitation of the battery, the excitation current cannot be cut off in time, and the generator continues to run and is in the state of external power generation, resulting in overcurrent, overheating, and then burning of the external wires at the output end of the generator, and may even cause smoke and fire wait for danger
If the above situation is not found during use, it will lead to very serious consequences
Method used
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[0051] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:
[0052] see figure 1 , figure 1 It is a structural schematic diagram of a batteryless alternator according to an embodiment of the present invention. The batteryless alternator of the present invention includes a rotor assembly 3, a stator assembly 4, a rectifier assembly 5 and a voltage regulator 6 installed between the front end cover 1 and the rear end cover 2, and also includes an undervoltage protection The device 7 is set in the voltage regulator 6 of the battery-less alternator, wherein the front end cover 1 and the rear end cover 2 are connected by bolts to jointly support each sub-assembly of the generator, and the rotor assembly 3 utilizes the principle of electromagnetic induction , through an excitation current, in the process of rotating with the generator, an induced magnetic field is generated, and the stator a...
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A accumulator-free alternating-current generator and an under-voltage protection device thereof are provided. The accumulator-free alternating-current generator comprises an under-voltage protection device. The under-voltage protection device is arranged in a regulator of the accumulator-free alternating-current generator. The under-voltage protection device comprises an overload protection mechanism which is connected with an output end of the accumulator-free alternating-current generator, a power supply unit of the accumulator-free alternating-current generator and an excitation switch of the accumulator-free alternating-current generator in order to control excitation and voltage output of the accumulator-free alternating-current generator. The accumulator-free alternating-current generator has an under-voltage protection function. When the output end of the generator is abnormal, the generator can be prevented from continuing running due to continuous excitation of a storage battery, and therefore, the alternating-current generator and vehicle-borne electrical appliances are protected.
Description
technical field [0001] The invention relates to a vehicle alternator, in particular to a batteryless alternator with an undervoltage protection function and an undervoltage protection device thereof. Background technique [0002] The non-battery alternator generally refers to an alternator that is only used to supply power for on-board electrical appliances, especially high-power electrical appliances, and not as an alternator for charging on-board batteries. During use, the on-board battery continues to provide excitation current for the non-battery generator to ensure the normal power supply of the generator. However, due to the loss of monitoring of the output voltage of the generator, once the output of the generator is abnormal, such as short circuit to ground, load Due to the continuous excitation of the battery, the excitation current cannot be cut off in time, and the generator continues to run and is in the state of external power generation, resulting in overcurren...
Claims
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IPC IPC(8): H02K11/26H02H7/06
Inventor 董大虎李宁宁张琳刘传康付明慧田苗苗
Owner PRESTOLITE ELECTRIC BEIJING