阅读说明：本技术 一种减少摩托车发动机磁噪音的控制方法 (Control method for reducing magnetic noise of motorcycle engine ) 是由 张健 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种减少摩托车发动机磁噪音的控制方法,1)设定调压退出转速T,转速T应略小于摩托车的怠速转速下限值；2)测定磁电机输出电压到达调压设定值附近时的转速范围[A,B]；3)调压器通过速度传感器监测电机实时转速V；4)调压器在短路调压状态时,监测到电机转速V大于范围上限B,从短路式调压切换到移相式调压；5)调压器在移相调压状态时,监测到电机转速V小于范围下限A,从移相式调压切换到短路式调压；6)调压器在短路调压状态时,检测到电机转速小于T时,退出调压；本发明通过采集转速信号,结合磁电机自身特性,在恰当的时机使调压器在短路式和移相式间切换,以避免单纯移相调压低速时的噪声问题。(The invention discloses a control method for reducing magnetic noise of a motorcycle engine, which comprises the following steps of 1) setting a pressure regulating quitting rotating speed T, wherein the rotating speed T is slightly smaller than the lower limit value of the idling rotating speed of a motorcycle; 2) measuring the rotating speed ranges [ A, B ] when the output voltage of the magneto reaches the vicinity of the voltage regulation set value; 3) the voltage regulator monitors the real-time rotating speed V of the motor through a speed sensor; 4) when the voltage regulator is in a short-circuit voltage regulation state, monitoring that the rotating speed V of the motor is greater than the upper limit B of the range, and switching from short-circuit voltage regulation to phase-shifting voltage regulation; 5) when the voltage regulator is in a phase-shifting voltage-regulating state, monitoring that the rotating speed V of the motor is less than the lower limit A of the range, and switching from phase-shifting voltage regulation to short-circuit voltage regulation; 6) when the voltage regulator is in a short-circuit voltage regulation state and the rotating speed of the motor is detected to be less than T, the voltage regulation is quitted; the invention collects the rotation speed signal, combines the characteristics of the magneto, and switches the voltage regulator between the short-circuit mode and the phase-shifting mode at a proper time so as to avoid the noise problem when the voltage is regulated at low speed by only phase shifting.)

1. A control method for reducing the magnetic noise of a motorcycle engine is characterized in that:

1) setting a pressure regulating quitting rotating speed T which is slightly smaller than the lower limit value of the idling rotating speed of the motorcycle;

2) measuring the rotating speed ranges [ A, B ] when the output voltage of the magneto reaches the vicinity of the voltage regulation set value;

3) the voltage regulator monitors the real-time rotating speed V of the motor through a speed sensor;

4) when the voltage regulator is in a short-circuit voltage regulation state, monitoring that the rotating speed V of the motor is greater than the upper limit B of the range, and switching from short-circuit voltage regulation to phase-shifting voltage regulation;

5) when the voltage regulator is in a phase-shifting voltage-regulating state, monitoring that the rotating speed V of the motor is less than the lower limit A of the range, and switching from phase-shifting voltage regulation to short-circuit voltage regulation;

6) when the voltage regulator is in a short-circuit voltage regulating state and detects that the rotating speed of the motor is less than T, the voltage regulation is quitted.

2. A control method for reducing magnetic noise of a motorcycle engine as claimed in claim 1, wherein: the upper limit B of the rotating speed in the step 2) meets the condition: the voltage output by the full bridge of the voltage regulator at the rotating speed is basically equivalent to the output voltage set by the voltage regulator.

3. A control method for reducing magnetic noise of a motorcycle engine as claimed in claim 1, wherein: the lower limit A of the rotating speed in the step 2) meets the condition that: when the speed-reducing regulator adopts a phase-shifting voltage-regulating mode, the output power of the speed-reducing regulator can meet the requirements of the whole motorcycle.

Technical Field

The invention belongs to the technical field of motorcycle engine magnetic noise control, and particularly relates to a control method for reducing motorcycle engine magnetic noise.

Background

With the progress of technology and the improvement of living standard, people pay attention to the feeling of riding a motorcycle. The problem of noise caused by a voltage regulator becomes a prominent focus problem in the process of riding the motorcycle.

At present, the mainstream voltage regulation modes comprise a short circuit mode, a switch mode and a phase shift mode.

The short-circuit voltage regulator rectifies the alternating current of the motor into direct current, samples the direct current voltage, drives the silicon controlled rectifier to be conducted after the direct current voltage exceeds a set value, enables a magneto coil to be approximately short-circuited, clips and reduces the output voltage of the magneto, and controls the rising of the output voltage. The voltage regulation method has the advantages that the voltage regulation is flexible, and the voltage output by the voltage regulator can be improved by utilizing the characteristic that the current cannot suddenly change under the low-speed condition. However, when the magneto rotates at a high speed, the thyristor is conducted for a long time to short circuit the magneto coil, the magneto coil works under full load for a long time, and the components are seriously heated, so that the service life of the voltage regulator is influenced; the short circuit of the magneto generates heat for a long time, which causes demagnetization of the permanent magnet and possibly burns out the coil, thereby influencing the service life of the motor.

The switch type voltage regulator is additionally provided with a silicon controlled rectifier device between a coil and a storage battery on the basis of a rectifier bridge, the device is kept on at ordinary times, and the silicon controlled rectifier is driven to be closed when the output voltage is detected to be higher than a set value, so that a magneto coil cannot form a closed loop to clip and step down the output voltage of a magneto and control the rise of the output voltage. This control method requires additional thyristor devices and peripheral circuits, which leads to increased costs. While switching the thyristor device increases system losses and produces noise at lower switching frequencies.

The phase-shifting voltage regulator changes the phase angle between the voltage and the current on the magneto coil by controlling the on and off of the rectifier bridge, thereby weakening the space magnetic field and achieving the effect of reducing the output voltage of the magneto. The mode greatly reduces energy loss in the voltage regulation process, and the current output is continuous. But the control degree of difficulty is big to under low-speed condition, when the counter electromotive force that the motor coil produced is less than the storage battery voltage electric current can flow to the voltage regulator from the storage battery, produce the current noise equally.

Disclosure of Invention

The invention aims to collect rotating speed signals and combine the characteristics of a magneto to switch a voltage regulator between a short-circuit mode and a phase-shifting mode at a proper time so as to avoid the noise problem when the voltage is regulated at low speed by simply shifting the phase.

In order to achieve the purpose, the invention provides the following technical scheme: a control method for reducing the magnetic noise of a motorcycle engine,

1) setting a pressure regulating quitting rotating speed T which is slightly smaller than the lower limit value of the idling rotating speed of the motorcycle;

2) measuring the rotating speed ranges [ A, B ] when the output voltage of the magneto reaches the vicinity of the voltage regulation set value;

3) the voltage regulator monitors the real-time rotating speed V of the motor through a speed sensor;

4) when the voltage regulator is in a short-circuit voltage regulation state, monitoring that the rotating speed V of the motor is greater than the upper limit B of the range, and switching from short-circuit voltage regulation to phase-shifting voltage regulation;

5) when the voltage regulator is in a phase-shifting voltage-regulating state, monitoring that the rotating speed V of the motor is less than the lower limit A of the range, and switching from phase-shifting voltage regulation to short-circuit voltage regulation;

6) when the voltage regulator is in a short-circuit voltage regulating state and detects that the rotating speed of the motor is less than T, the voltage regulation is quitted.

Preferably, the upper limit B of the rotation speed in step 2) should satisfy the condition: the voltage output by the full bridge of the voltage regulator at the rotating speed is basically equivalent to the output voltage set by the voltage regulator.

Preferably, the lower rotation speed limit a in step 2) should satisfy the condition: when the speed-reducing regulator adopts a phase-shifting voltage-regulating mode, the output power of the speed-reducing regulator can meet the requirements of the whole motorcycle.

Compared with the prior art, the invention has the beneficial effects that: the control method for reducing the magnetic noise of the motorcycle engine provided by the invention has the advantages that the rotating speed signal is collected, the characteristics of the magneto are combined, and the voltage regulator is switched between a short-circuit mode and a phase-shifting mode at a proper time, so that the noise problem of low speed when the voltage is regulated by simply shifting the phase is avoided.

Drawings

FIG. 1 is a schematic diagram of the control principle of the present invention;

fig. 2 is a schematic diagram illustrating switching of voltage regulation modes according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 2, the present invention provides a technical solution: a control method for reducing the magnetic noise of a motorcycle engine,

1) setting a pressure regulating quitting rotating speed T which is slightly smaller than the lower limit value of the idling rotating speed of the motorcycle;

2) measuring the rotating speed ranges [ A, B ] when the output voltage of the magneto reaches the vicinity of the voltage regulation set value;

3) the voltage regulator monitors the real-time rotating speed V of the motor through a speed sensor;

4) when the voltage regulator is in a short-circuit voltage regulation state, monitoring that the rotating speed V of the motor is greater than the upper limit B of the range, and switching from short-circuit voltage regulation to phase-shifting voltage regulation;

5) when the voltage regulator is in a phase-shifting voltage-regulating state, monitoring that the rotating speed V of the motor is less than the lower limit A of the range, and switching from phase-shifting voltage regulation to short-circuit voltage regulation;

6) when the voltage regulator is in a short-circuit voltage regulating state and detects that the rotating speed of the motor is less than T, the voltage regulation is quitted.

In this embodiment, preferably, the upper limit B of the rotation speed in step 2) should satisfy the condition: the voltage output by the full bridge of the voltage regulator at the rotating speed is basically equivalent to the output voltage set by the voltage regulator.

In this embodiment, it is preferable that the lower rotation speed limit a in step 2) should satisfy the condition: when the speed-reducing regulator adopts a phase-shifting voltage-regulating mode, the output power of the speed-reducing regulator can meet the requirements of the whole motorcycle.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.