A kind of energy-saving circuit based on magnetic encoding vehicle generator control board
By switching the power IC controlled by a magnetic encoder and MCU, the high power consumption problem of the vehicle generator control board when the generator stops or runs at low speed is solved, realizing low power consumption control and long battery life, avoiding the increase and complexity of sensors, and improving system safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN PUNENGJIE SMART ENERGY CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-03
AI Technical Summary
Existing vehicle-mounted generator control boards continue to operate when the generator stops or runs at low speeds, resulting in excessively high standby power consumption, shortened battery life, and increased system complexity and cost due to traditional solutions.
A magnetic encoder is used to collect the generator speed in real time. The MCU controls the power IC to switch the working state of the generator control board. The control board is activated only when the generator speed reaches the set threshold and enters standby mode when it is below the threshold, thus avoiding the need for additional sensors.
It enables the control board to be completely powered off when the generator stops or is running at low speed, reduces system standby power consumption by 99%, extends the vehicle battery's range by more than 10 times, eliminates the risk of reverse current surges, and improves safety performance.
Smart Images
Figure CN224459643U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of generator control technology, specifically to an energy-saving circuit for a vehicle-mounted generator control board based on magnetic coding. Background Technology
[0002] In applications where a generator is used to charge a vehicle battery, the alternating current output from the generator must be converted to direct current by a control board before it can charge the vehicle battery. This control board typically includes a rectifier circuit, a control chip, and a power management unit (such as a power IC). Since the generator only generates electricity when its input shaft is rotating, if the control board continues to operate when the generator is off (e.g., during standby or low-speed operation), it will consume power from the vehicle battery, resulting in excessively high standby power consumption and a significant reduction in the vehicle battery's driving time.
[0003] In traditional solutions, the control board is typically powered directly by the vehicle battery and remains operational for extended periods, or it relies on external sensors (such as Hall effect sensors) to detect rotor position for start-stop control. The former results in unnecessary energy loss, while the latter requires additional sensing components and circuitry, leading to increased system complexity, higher costs, and reduced reliability.
[0004] To address the aforementioned issues, there is an urgent need for a low-power, highly integrated power-on / off control solution that can automatically start and stop the control board based on the actual operating status of the generator, while avoiding the introduction of additional sensors. Utility Model Content
[0005] Based on this, the present invention provides an energy-saving circuit for a vehicle-mounted generator control board based on magnetic coding. By collecting the rotational speed of the generator, when the speed is greater than a set threshold, the MCU enables and activates the power IC to operate, and the power IC outputs operating voltage to start the control board; when the speed is greater than the set threshold, the MCU de-enables and puts the power IC into standby mode, and the power IC stops outputting operating voltage and shuts off power supply to the control board. This solves the problem that the control board of the existing generator is always in standby mode, resulting in excessive standby power consumption and a significant reduction in the battery life of the vehicle.
[0006] To achieve the above objectives, this utility model provides an energy-saving circuit for a vehicle-mounted generator control board based on magnetic encoding. The alternating current output by the generator is converted into direct current by the control board to charge the vehicle battery. The generator is equipped with a magnetic encoder that collects speed signals in real time. The magnetic encoder is connected to an MCU. The enable signal output terminal of the MCU is connected to the EN pin of the power IC on the control board to switch the power IC between standby and working states through the level signal of the EN pin. The power IC is powered by the vehicle battery.
[0007] Preferably, the rotation speed signal is 80~100rpm, and the enable signal output terminal of the MCU outputs a high-level signal; and / or, the rotation speed signal is 30~60rpm, and the enable signal output terminal of the MCU outputs a low-level signal.
[0008] Preferably, the generator adopts a permanent magnet synchronous motor or asynchronous motor structure, and its output terminal is electrically connected to the control board through a three-phase cable, with a winding impedance range of 0.5-2Ω.
[0009] Preferably, the power supply IC is a DC-DC step-down constant voltage chip.
[0010] Preferably, the power supply IC is an H6258L DC-DC constant voltage IC.
[0011] This utility model discloses an energy-saving circuit for a vehicle-mounted generator control board based on magnetic coding. When the generator exceeds the set speed, the control board is turned on; when it falls below the set speed, the control board is turned off. Under other circumstances, only the power IC on the control board is in standby mode, thereby achieving the purpose of energy saving, reducing consumption, and improving the range of the vehicle battery.
[0012] By adopting the above technical solution, the following beneficial effects can be achieved:
[0013] 1) When the generator stops or runs at low speed (speed < set stop speed threshold), the main circuit of the control board is completely de-energized, and only the power IC maintains a microamp-level standby current (typical value <10μA); when the generator speed is greater than the set start speed threshold, the main circuit of the control board is fully started, so that the AC power output by the generator is converted into DC power by the control board to charge the vehicle battery.
[0014] 2) By adopting this energy-saving circuit, the system's standby power consumption is reduced by more than 99%, and the vehicle battery's driving time is extended to more than 10 times that of ordinary standby solutions, completely solving the problem of energy waste in non-power generation states;
[0015] 3) When the generator stops, the control board is completely de-energized, eliminating the risk of reverse current from the vehicle battery impacting the generator windings, thus enhancing safety performance. Attached Figure Description
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0017] Figure 1 A circuit diagram of one embodiment of an energy-saving circuit for an on-board generator control board based on magnetic coding.
[0018] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Terms such as "upper," "lower," "left," "right," "middle," and "one" used in the preferred embodiments are merely for clarity of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of the present invention.
[0020] like Figure 1 As shown, this utility model embodiment provides an energy-saving circuit for a vehicle-mounted generator control board based on magnetic encoding. The alternating current output by the generator is converted into direct current by the control board to charge the vehicle battery. The generator is characterized by having a magnetic encoder that collects speed signals in real time. The magnetic encoder is connected to a microcontroller (MCU). The enable signal output terminal of the MCU is connected to the EN pin of the power IC on the control board to switch the power IC between standby and working states through the level signal of the EN pin. The power IC is powered by the vehicle battery.
[0021] Specifically, the generator is a permanent magnet synchronous motor, and its output terminal is electrically connected to the control board via a three-phase cable. The winding impedance range is 1Ω. The MCU is a single-chip microcomputer and is powered by the vehicle battery.
[0022] In one specific embodiment, when the speed signal is set to 100 rpm, the MCU outputs a high-level signal through the enable signal output terminal, enabling the power IC to operate. The power IC provides operating voltage to other onboard circuits (rectifier circuit, control chip) of the control board through power output. At this time, the generator outputs DC through the bridge rectifier circuit on the control board to charge the vehicle battery. When the speed signal is 60 rpm, the MCU outputs a low-level signal through the enable signal output terminal, enabling the power IC to standby. At this time, the other onboard circuits of the control board are powered off and stop working.
[0023] It should be noted that the alternating current output from the generator is converted to direct current by the control board to charge the vehicle battery. This is a conventional circuit structure, therefore... Figure 1 It is not shown in the text.
[0024] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is defined only by the appended claims.
Claims
1. A magnetic coding based energy saving circuit for alternator control panel of vehicle, wherein the AC output of alternator is converted to DC by the control panel and the DC is used to charge the battery of the vehicle, characterized in that, The generator is equipped with a magnetic encoder that collects speed signals in real time. The magnetic encoder is connected to an MCU. The enable signal output terminal of the MCU is connected to the EN pin of the power IC on the control board to switch the power IC between standby and working states through the level signal of the EN pin. The power IC is powered by the vehicle battery.
2. The magnetic coding based energy saving circuit for an alternator control board of a vehicle of claim 1, wherein, The rotation speed signal is 80~100rpm, and the enable signal output terminal of the MCU outputs a high-level signal; And / or, the rotation speed signal is 30~60rpm, and the enable signal output terminal of the MCU outputs a low-level signal.
3. The magnetic coding based energy saving circuit for an alternator control board of a vehicle of claim 1, wherein, The generator adopts a permanent magnet synchronous motor or asynchronous motor structure, and its output terminal is electrically connected to the control board through a three-phase cable. The winding impedance range is 0.5-2Ω.
4. The magnetic coding based energy saving circuit for an alternator control board of a vehicle of claim 1, wherein, The power IC is a DC-DC step-down constant voltage chip.
5. The magnetic coding based energy saving circuit for an alternator control board of a vehicle of claim 1, wherein, The power supply IC is model H6258L DC-DC constant voltage IC.