Charging pile electromagnetic lock control circuit and method
A control circuit and electromagnetic lock technology, applied in charging stations, electric vehicle charging technology, building locks, etc., can solve the problems of complex control methods, occupying CPU resources, occupying MCU, etc., saving IO port resources and reducing the burden of CPU Effect
Active Publication Date: 2021-12-31
TIANCHANG TIANNENG NEW ENERGY CO LTD
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Problems solved by technology
This control method requires two control signals and occupies at least 2 IO port resources of the MCU.
In addition, this control method is relatively complicated: 1. After each lock or unlock control signal is sent, the lock or unlock signal must be reset after successfully receiving the feedback signal status. Once the feedback signal is abnormal, it may cause lock or unlock The signal continues to exist to burn out the electromagnetic lock. Of course, the duration of the locking or unlocking control signal can be limited, but this will inevitably occupy CPU resources.
2. Once the program runs away during the locking or unlocking process, the driving signal of the electromagnetic lock cannot be removed in time, and there is a risk of burning the electromagnetic lock
3. The locking and unlocking signals are independent, and the electromagnetic lock has the risk of receiving contradictory instructions
Method used
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[0028] The present application will be further introduced below in conjunction with the accompanying drawings and embodiments.
[0029] In the following introduction, the terms "first" and "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance. The following description provides multiple embodiments of the present invention, and different embodiments can be replaced or combined in combination, so this application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment contains features A, B, C, and another embodiment contains features B, D, then the application should also be considered to include all other possible combinations containing one or more of A, B, C, D Although this embodiment may not be clearly written in the following content.
[0030] The following description provides examples, and does not limit the scope,...
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The invention provides a charging pile electromagnetic lock control circuit and method. The circuit comprises a filter circuit, a comparator, a delay circuit and a push-pull circuit, wherein the filter circuit is connected with the comparator and is used for outputting a filtered control signal to the comparator; the comparator is connected with the delay circuit and the push-pull circuit and is used for comparing the control signal with a reference signal and controlling the output voltage according to a comparison result; and the delay circuit is used for lowering the output voltage after delaying the preset time. Locking and unlocking control of an electromagnetic lock can be achieved only through one IO port, IO port resources are saved, additional CPU monitoring is not needed in the control process, and the burden of a CPU is relieved. and the output of the IO port is only in a 1 or 0 state, so that the electromagnetic lock cannot receive a contradictory control instruction.
Description
technical field [0001] The invention belongs to the field of charging piles, and in particular relates to a charging pile electromagnetic lock control circuit and method. Background technique [0002] The electromagnetic lock coil usually uses ±12V voltage to drive the locking and unlocking of the electromagnetic lock. For example, apply +12V between EL+ and EL- at both ends of the electromagnetic lock coil and keep it for more than 200ms-500ms, and the electromagnetic lock is locked; apply -12V and keep it More than 200ms-500ms, the electromagnetic lock is unlocked. In addition, once the electromagnetic lock is successfully locked or unlocked, it is hoped that the +12V or -12V voltage applied to both ends of the electromagnetic lock coil can be removed in time to prevent the electromagnetic lock coil from being overheated and damaged. [0003] At present, the commonly used electromagnetic lock control circuit uses two control signals to drive EL+, EL- to switch between +12...
Claims
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Login to View More IPC IPC(8): E05B47/00E05B65/00B60L53/31
CPCE05B47/0002E05B65/00B60L53/31Y02T90/12
Inventor 姜德轩陈林朱磊
Owner TIANCHANG TIANNENG NEW ENERGY CO LTD