阅读说明：本技术 Pg电机控制方法 (PG motor control method ) 是由 林祖武 曾凡海 廖祥 于 2021-07-28 设计创作，主要内容包括：一种PG电机控制方法,其特征在于,包括以下步骤：步骤一、确定PG电机启动后,检测是否有反馈信号；步骤二、如果未有反馈信号,执行检测时间延长到15S；步骤三、如果15S内未检测到反馈转速,则按当前转速运行,如如检测到反馈转速信息,则按照档位信息导通；步骤四、如果开始检测到反馈转速信息,当检测大于2500r/min时,则按照当前的转速运行,如小于2500r/min时,按照正常的反馈信息运行；步骤五、当检测的反馈信息小于300r/min时,则按当前转速运行。可在MCU接收不到正常的转速信号时,能按照当前的转速正常运行,减少维修量,同时也大大减少了产品的报废量,克服现有技术中的不足之处；售后在维修上可以不更换电机,减少维修量及客户减少维修成本。(A PG motor control method is characterized by comprising the following steps: step one, after a PG motor is started, detecting whether a feedback signal exists or not; step two, if no feedback signal exists, the detection time is prolonged to 15S; step three, if the feedback rotating speed is not detected in 15S, the operation is carried out according to the current rotating speed, and if the feedback rotating speed information is detected, the operation is conducted according to the gear information; if the feedback rotating speed information is detected, when the detection is more than 2500r/min, the operation is carried out according to the current rotating speed, and if the detection is less than 2500r/min, the operation is carried out according to the normal feedback information; and step five, when the detected feedback information is less than 300r/min, operating according to the current rotating speed. When the MCU can not receive a normal rotating speed signal, the MCU can normally operate according to the current rotating speed, so that the maintenance amount is reduced, the scrappage of products is greatly reduced, and the defects in the prior art are overcome; the motor can not be replaced in maintenance after sale, so that the maintenance amount is reduced, and the maintenance cost is reduced for customers.)

1. A PG motor control method is characterized by comprising the following steps:

step one, after a PG motor is started, detecting whether a feedback signal exists or not;

step two, if no feedback signal exists, the detection time is prolonged to 15S;

step three, if the feedback rotating speed is not detected in 15S, the operation is carried out according to the current rotating speed, and if the feedback rotating speed information is detected, the operation is conducted according to the gear information;

if the feedback rotating speed information is detected, when the detection is more than 2500r/min, the operation is carried out according to the current rotating speed, and if the detection is less than 2500r/min, the operation is carried out according to the normal feedback information;

and step five, when the detected feedback information is less than 300r/min, operating according to the current rotating speed.

2. The PG motor control method of claim 1, wherein the gear information on comprises a gear H and a gear M; if the set value of the gear H is reached, entering calibration a for conduction according to an instruction; if the set value of the gear H reaches a middle gear M; if the gear M reaches the set position, the command enters the calibration b for conduction; otherwise, the command enters calibration c conduction.

Technical Field

The invention relates to a PG motor control method.

Background

The PG motor is widely used in household appliances due to good speed regulation performance and low price, the PG motor detects the actual rotating speed in real time through a rotating speed detection device (usually a PG feedback plate) and then feeds back the actual rotating speed to the MCU, the MCU adjusts the conduction angle of the controlled silicon or a solid state relay by comparing the difference value between the actual rotating speed and the preset rotating speed to realize the adjustability and stability of the rotating speed of the motor, the whole operation process of the PG motor highly depends on the rotating speed detection device to detect the rotating speed and feed back the rotating speed, the rotating speed detection device is an assembly part independent of a motor body, the rotating speed detection circuit of the controller is connected to form a complete rotating speed detection feedback system loop, the system loop is possibly damaged in the links of production, transportation, installation, use and the like, and the MCU cannot receive normal rotating speed signals and cannot normally drive the controlled silicon after the system loop is damaged, at the moment, the program can report errors, the controller cuts off the power of the motor, the motor stops running and needs to be maintained, the using effect is seriously influenced, the maintenance amount is increased, and an effective solution is not provided at present for the problems. In order to overcome the defects, a PG motor control method is developed.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a PG motor control method, which can normally operate according to the current rotating speed when an MCU (microprogrammed control unit) cannot receive a normal rotating speed signal, reduce the maintenance amount, greatly reduce the scrappage of products and overcome the defects in the prior art; the motor can not be replaced in maintenance after sale, so that the maintenance amount is reduced, and the maintenance cost is reduced for customers.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a PG motor control method, which is characterized by comprising the following steps:

step one, after a PG motor is started, detecting whether a feedback signal exists or not;

step two, if no feedback signal exists, the detection time is prolonged to 15S;

step three, if the feedback rotating speed is not detected in 15S, the operation is carried out according to the current rotating speed, and if the feedback rotating speed information is detected, the operation is conducted according to the gear information;

if the feedback rotating speed information is detected, when the detection is more than 2500r/min, the operation is carried out according to the current rotating speed, and if the detection is less than 2500r/min, the operation is carried out according to the normal feedback information;

and step five, when the detected feedback information is less than 300r/min, operating according to the current rotating speed.

The gear information conduction comprises a gear H and a gear M; if the set value of the gear H is reached, entering calibration a for conduction according to an instruction; if the set value of the gear H reaches a middle gear M; if the gear M reaches the set position, the command enters the calibration b for conduction; otherwise, the command enters calibration c conduction.

Compared with the background technology, the invention has the following effects:

by adopting the scheme, the invention can normally operate according to the current rotating speed when the MCU can not receive normal rotating speed signals, thereby reducing the maintenance amount, greatly reducing the scrappage of products and overcoming the defects in the prior art; the motor can not be replaced in maintenance after sale, so that the maintenance amount is reduced, and the maintenance cost is reduced for customers.

Drawings

Fig. 1 is a control flow chart of a PG motor control method according to an embodiment of the present invention;

Detailed Description

Referring to fig. 1, an embodiment of the present invention preferably provides a PG motor control method, which is characterized by comprising the following steps:

step one, after a PG motor is started, detecting whether a feedback signal exists or not;

step two, if no feedback signal exists, the detection time is prolonged to 15S;

step three, if the feedback rotating speed is not detected in 15S, the operation is carried out according to the current rotating speed, and if the feedback rotating speed information is detected, the operation is conducted according to the gear information;

if the feedback rotating speed information is detected, when the detection is more than 2500r/min, the operation is carried out according to the current rotating speed, and if the detection is less than 2500r/min, the operation is carried out according to the normal feedback information;

and step five, when the detected feedback information is less than 300r/min, operating according to the current rotating speed.

The gear information conduction comprises a gear H and a gear M; if the set value of the gear H is reached, entering calibration a for conduction according to an instruction; if the set value of the gear H reaches a middle gear M; if the gear M reaches the set position, the command enters the calibration b for conduction; otherwise, the command enters calibration c conduction.

When the PG motor works, firstly, whether a feedback signal exists or not is detected after the PG motor is started, if the feedback signal does not exist, the detection time is prolonged to 15S, if the feedback rotating speed is not detected for 15S, the PG motor runs according to the current rotating speed, and if the feedback rotating speed information is detected, the PG motor is conducted according to gear information; if the feedback rotating speed information is detected at the beginning, when the detected rotating speed is greater than 2500 revolutions per minute, the operation is carried out according to the current rotating speed, and if the detected rotating speed is less than 2500 revolutions per minute, the operation is carried out according to the normal feedback information; and when the detected feedback information is less than 300 revolutions per minute, the operation is carried out according to the current rotating speed. The device can normally operate according to the current rotating speed, reduces the maintenance amount, greatly reduces the product scrap amount and overcomes the defects in the prior art. When the MCU can not receive a normal rotating speed signal, the MCU can normally operate according to the current rotating speed, so that the maintenance amount is reduced, the scrappage of products is greatly reduced, and the defects in the prior art are overcome; the motor can not be replaced in maintenance after sale, so that the maintenance amount is reduced, and the maintenance cost is reduced for customers.

While this invention has been described in terms of the preferred embodiments, there may be alterations, permutations, and equivalents, which fall within the scope of this invention; there are many alternative ways of implementing the invention. It is therefore intended that the following appended claims be interpreted as including all such alterations, permutations, and equivalents as fall within the true spirit and scope of the present invention; it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and modifications and substitutions based on the known art are possible within the scope of the present invention, which is defined by the claims.