Automatic control method for motor cooling and heating system

Abstract

The application discloses an automatic control method of a motor cooling and heating system and relates to the technical field of motors. Through analysis of motor materials, the limit minimum temperature and the limit maximum temperature that can be borne by the motor are determined; through analysis of motor lubricating oil and sealing materials, the motor heating temperature range, the motor cooling temperature range and the temperature range in which the motor does not need refrigerant auxiliary groups to operate during normal operation are determined; a motor temperature sensor that outputs an analog signal is arranged in the motor to identify the internal temperature of the motor; an MCU controller judges whether a refrigeration program or a heating program is started or whether the cooling system is stopped according to the actual internal temperature of the motor; and the motor temperature sensor is provided with two. The application can identify the internal temperature of the motor, automatically switch the cooling and heating modes according to the internal temperature of the motor, reduce the heat dissipation power consumption, save the loss of motor operation, ensure long-time stable operation of the system and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically to an automatic control method for motor cooling and heating systems. Background Technology

[0002] The motor cooling and heating system is a key component in ensuring the long-term high-load operation of the entire motor system. Currently, the existing control methods for motor cooling and heating systems have the following problems:

[0003] (1) Unable to identify the internal temperature of the motor;

[0004] (2) It cannot automatically switch between cooling and heating modes based on the internal temperature of the motor;

[0005] (3) It cannot control the start and stop of heat dissipation drive motor and other devices according to the actual internal temperature of the motor, thus failing to effectively reduce heat dissipation power consumption;

[0006] (4) In the application of sensors, double insurance was not implemented. When one sensor fails, the motor may be burned out.

[0007] To solve the above problems, it is particularly necessary to develop an automatic control method for motor cooling and heating systems. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automatic control method for a motor cooling and heating system, which can identify the internal temperature of the motor and automatically switch the cooling and heating mode according to the internal temperature of the motor, reduce heat dissipation and power consumption, save motor operation losses, ensure long-term stable operation of the system, and is easy to promote and use.

[0009] To achieve the above objectives, the present invention provides an automatic control method for a refrigerant-based motor cooling and heating system, comprising the following steps:

[0010] (1) Through analysis of motor materials, engineers determine the maximum temperature that the motor can withstand, namely the minimum maximum temperature T0 and the maximum maximum temperature T3. Through analysis of motor lubricating oil and sealing materials, engineers determine the motor heating temperature range T0-T1 and the motor cooling temperature range T2-T3, as well as the temperature range T1-T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation.

[0011] (2) The motor temperature sensor, which outputs an analog signal, identifies the internal temperature of the motor. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the actual internal motor temperature Tr.

[0012] ① When Tr≤T0, the motor stops and an alarm sounds;

[0013] ② When T0≤Tr≤T1, the system switches to refrigerant heating mode. The refrigerant fan motor is driven by the refrigerant fan motor driver to start the refrigerant fan. The refrigerant compressor is started by the refrigerant compressor driver, and the internal temperature of the motor is continuously identified by the motor temperature sensor. After the refrigerant is heated, it is determined whether Tr has been heated to Tr≥T1+(T2-T1)×μ. If so, the refrigerant compressor and refrigerant fan are stopped; otherwise, the system waits.

[0014] ③ When T1≤Tr≤T2, start the motor and determine whether Tr has heated up to Tr≥T1+(T2-T1)×μ. If so, switch to refrigerant cooling and start the refrigerant fan; otherwise, stop the motor, stop the refrigerant compressor, and stop the refrigerant fan.

[0015] ④ When T2≤Tr≤T3, the system switches to refrigerant cooling mode, and the refrigerant fan motor is driven by the refrigerant fan motor driver to start the refrigerant fan; after starting refrigerant cooling, it is determined whether Tr has cooled to Tr≤T2+(T3-T2)×μ. If so, the refrigerant compressor and refrigerant fan are stopped; otherwise, wait.

[0016] ⑤ When Tr≥T3, the motor stops and an alarm sounds;

[0017] (3) The refrigerant pressure sensor with analog signal output installed in the refrigerant system monitors the refrigerant pressure in the cooling and heating system. The MCU controller determines whether the refrigerant pressure is within the working pressure range based on the pressure value obtained from the monitoring. If the refrigerant pressure is within the working pressure range, it switches to refrigerant cooling and starts the refrigerant fan. If the refrigerant pressure is not within the working pressure range and the pressure is insufficient, it will issue an early alarm.

[0018] Preferably, two motor temperature sensors are provided. If one motor temperature sensor fails, the other temperature sensor can still be used normally, so that the motor will not be burned out.

[0019] The automatic control method for a motor cooling and heating system based on ceramic plates includes the following steps:

[0020] (1) Through analysis of motor materials, engineers determine the maximum temperature that the motor can withstand, namely the minimum maximum temperature T0 and the maximum maximum temperature T3. Through analysis of motor lubricating oil and sealing materials, engineers determine the motor heating temperature range T0-T1 and the motor cooling temperature range T2-T3, as well as the temperature range T1-T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation.

[0021] (2) The motor temperature sensor, which outputs an analog signal, identifies the internal temperature of the motor. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the actual internal motor temperature Tr.

[0022] ① When Tr≤T0, the motor stops and an alarm sounds;

[0023] ② When T0≤Tr≤T1, the system switches to ceramic plate heating mode. The internal and external air duct fan motor driver drives the fan motor to start the hot and cold fans, turn on the ceramic plate power, and the motor temperature sensor continues to identify the internal temperature of the motor. After the ceramic plate is heated, it is determined whether Tr is heated to Tr≥T1+(T2-T1)×μ. If so, the ceramic plate power is turned off and the hot and cold fans are stopped; otherwise, it waits.

[0024] ③ When T1≤Tr≤T2, start the motor and determine whether Tr has heated up to Tr≥T1+(T2-T1)×μ. If so, switch to ceramic plate cooling, start the refrigerant fan, turn on the ceramic plate power supply, and continue to identify the internal temperature of the motor by the motor temperature sensor; otherwise, stop the motor, turn off the ceramic plate power supply, and stop the hot and cold fans.

[0025] ④ When T2≤Tr≤T3, the system switches to ceramic plate cooling mode. The internal and external air duct fan motor drivers drive the fan motors, start the hot and cold fans, turn on the ceramic plate power, and the motor temperature sensor continues to identify the internal temperature of the motor. After starting ceramic plate cooling, it is determined whether Tr has cooled to Tr≤T2+(T3-T2)×μ. If so, the ceramic plate power is turned off and the hot and cold fans are stopped; otherwise, it waits.

[0026] ⑤ When Tr≥T3, the motor stops and an alarm is triggered.

[0027] Preferably, two motor temperature sensors are provided, so that if one motor temperature sensor fails, the other motor temperature sensor can still be used normally, and the motor will not be burned out.

[0028] The beneficial effects of this invention are: This invention can automatically switch between cooling and heating modes according to the internal temperature of the motor, ensuring stable and efficient operation of the system, reducing heat dissipation and power consumption, saving motor operating losses, and has broad application prospects. Attached Figure Description

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0030] Figure 1 This is a motor flow control diagram based on refrigerant cooling and heating according to the present invention.

[0031] Figure 2This is a block diagram illustrating the control relationship between refrigerant cooling and heating in this invention.

[0032] Figure 3 This is a motor flow control diagram based on ceramic plate cooling and heating according to the present invention.

[0033] Figure 4 This is a block diagram illustrating the control relationship between ceramic sheet cooling and heating in this invention. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Reference Figure 1-4 The specific implementation adopts the following technical solution: a control method based on both refrigerant and ceramic plates, wherein the automatic control method for the refrigerant-based motor cooling and heating system comprises the following steps:

[0036] (1) Through analysis of motor materials, engineers determine the maximum temperature that the motor can withstand, namely the minimum maximum temperature T0 and the maximum maximum temperature T3. Through analysis of motor lubricating oil and sealing materials, engineers determine the motor heating temperature range T0-T1 and the motor cooling temperature range T2-T3, as well as the temperature range T1-T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation.

[0037] (2) The motor temperature sensor, which outputs an analog signal, identifies the internal temperature of the motor. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the actual internal motor temperature Tr.

[0038] ① When Tr≤T0, the motor stops and an alarm sounds;

[0039] ② When T0≤Tr≤T1, the system switches to refrigerant heating mode. The refrigerant fan motor is driven by the refrigerant fan motor driver to start the refrigerant fan. The refrigerant compressor is started by the refrigerant compressor driver, and the internal temperature of the motor is continuously identified by the motor temperature sensor. After the refrigerant is heated, it is determined whether Tr has been heated to Tr≥T1+(T2-T1)×μ. If so, the refrigerant compressor and refrigerant fan are stopped; otherwise, the system waits.

[0040] ③ When T1≤Tr≤T2, start the motor and determine whether Tr has heated up to Tr≥T1+(T2-T1)×μ. If so, switch to refrigerant cooling and start the refrigerant fan; otherwise, stop the motor, stop the refrigerant compressor, and stop the refrigerant fan.

[0041] ④ When T2≤Tr≤T3, the system switches to refrigerant cooling mode, and the refrigerant fan motor is driven by the refrigerant fan motor driver to start the refrigerant fan; after starting refrigerant cooling, it is determined whether Tr has cooled to Tr≤T2+(T3-T2)×μ. If so, the refrigerant compressor and refrigerant fan are stopped; otherwise, wait.

[0042] ⑤ When Tr≥T3, the motor stops and an alarm sounds;

[0043] (3) The refrigerant pressure sensor with analog signal output installed in the refrigerant system monitors the refrigerant pressure in the cooling and heating system. The MCU controller determines whether the refrigerant pressure is within the working pressure range based on the pressure value obtained from the monitoring. If the refrigerant pressure is within the working pressure range, it switches to refrigerant cooling and starts the refrigerant fan. If the refrigerant pressure is not within the working pressure range and the pressure is insufficient, it will issue an early alarm.

[0044] The automatic control method for a motor cooling and heating system based on ceramic plates includes the following steps:

[0045] (1) Through analysis of motor materials, engineers determine the maximum temperature that the motor can withstand, namely the minimum maximum temperature T0 and the maximum maximum temperature T3. Through analysis of motor lubricating oil and sealing materials, engineers determine the motor heating temperature range T0-T1 and the motor cooling temperature range T2-T3, as well as the temperature range T1-T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation.

[0046] (2) The motor temperature sensor, which outputs an analog signal, identifies the internal temperature of the motor. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the actual internal temperature Tr of the motor.

[0047] ① When Tr≤T0, the motor stops and an alarm sounds;

[0048] ② When T0≤Tr≤T1, the system switches to ceramic plate heating mode. The internal and external air duct fan motor driver drives the fan motor to start the hot and cold fans, turn on the ceramic plate power, and the motor temperature sensor continues to identify the internal temperature of the motor. After the ceramic plate is heated, it is determined whether Tr is heated to Tr≥T1+(T2-T1)×μ. If so, the ceramic plate power is turned off and the hot and cold fans are stopped; otherwise, it waits.

[0049] ③ When T1≤Tr≤T2, start the motor and determine whether Tr has heated up to Tr≥T1+(T2-T1)×μ. If so, switch to ceramic plate cooling, start the refrigerant fan, turn on the ceramic plate power supply, and continue to identify the internal temperature of the motor by the motor temperature sensor; otherwise, stop the motor, turn off the ceramic plate power supply, and stop the hot and cold fans.

[0050] ④ When T2≤Tr≤T3, the system switches to ceramic plate cooling mode. The internal and external air duct fan motor drivers drive the fan motors, start the hot and cold fans, turn on the ceramic plate power, and the motor temperature sensor continues to identify the internal temperature of the motor. After starting ceramic plate cooling, it is determined whether Tr has cooled to Tr≤T2+(T3-T2)×μ. If so, the ceramic plate power is turned off and the hot and cold fans are stopped; otherwise, it waits.

[0051] ⑤ When Tr≥T3, the motor stops and an alarm is triggered.

[0052] It is worth noting that the motor temperature sensors in the above-mentioned motor cooling and heating systems based on refrigerant or ceramic plates are all equipped with two sensors, which is a double insurance. If one motor temperature sensor fails, the other motor temperature sensor can still be used normally, and the motor will not be burned out.

[0053] This specific implementation calculates various extreme temperatures of the motor based on its materials. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the temperature. By judging the temperature, when the actual internal temperature of the motor Tr≤T0 or Tr≥T3, the motor stops and an alarm is triggered. Through analysis of the motor lubricating oil, sealing materials, and other materials, the heating temperature range T0≤Tr≤T1 and the cooling temperature range T2≤Tr≤T3 of the motor are determined, as well as the temperature range T1≤Tr≤T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation. The system obtains the normal operating temperature range by analyzing the cooling effect of the refrigerant or ceramic plates, and triggers an alarm if the temperature exceeds the range.

[0054] This specific implementation can identify the internal temperature of the motor and automatically switch the cooling and heating modes according to the internal temperature of the motor, control the start and stop of the heat dissipation drive motor and other components, effectively reduce heat dissipation power consumption, require no manual intervention, greatly save motor operation losses, ensure the stable and efficient operation of the motor cooling and heating system, and ensure that the motor can maintain a suitable temperature under various working conditions, thereby ensuring its performance and lifespan, and has broad market application prospects.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An automatic control method for a refrigerant-based motor cooling and heating system, characterized in that, The steps are as follows: (1) Through analysis of motor materials, engineers determine the maximum temperature that the motor can withstand, namely the minimum maximum temperature T0 and the maximum maximum temperature T3. Through analysis of motor lubricating oil and sealing materials, engineers determine the motor heating temperature range T0-T1 and the motor cooling temperature range T2-T3, as well as the temperature range T1-T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation. (2) The motor temperature sensor, which outputs an analog signal, identifies the internal temperature of the motor. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the actual internal temperature Tr of the motor. ① When Tr≤T0, the motor stops and an alarm sounds; ② When T0≤Tr≤T1, the system switches to refrigerant heating mode. The refrigerant fan motor is driven by the refrigerant fan motor driver to start the refrigerant fan. The refrigerant compressor is started by the refrigerant compressor driver, and the internal temperature of the motor is continuously identified by the motor temperature sensor. After the refrigerant is heated, it is determined whether Tr has been heated to Tr≥T1+(T2-T1)×μ. If so, the refrigerant compressor and refrigerant fan are stopped; otherwise, the system waits. ③ When T1≤Tr≤T2, start the motor and determine whether Tr has heated up to Tr≥T1+(T2-T1)×μ. If so, switch to refrigerant cooling and start the refrigerant fan. Otherwise, stop the motor, stop the refrigerant compressor, and stop the refrigerant fan; ④ When T2≤Tr≤T3, the system switches to refrigerant cooling mode, and the refrigerant fan motor is driven by the refrigerant fan motor driver to start the refrigerant fan; after starting refrigerant cooling, it is determined whether Tr has cooled to Tr≤T2+(T3-T2)×μ. If so, the refrigerant compressor and refrigerant fan are stopped; otherwise, wait. ⑤ When Tr≥T3, the motor stops and an alarm sounds; (3) The refrigerant pressure sensor with analog signal output installed in the refrigerant system monitors the refrigerant pressure in the cooling and heating system. The MCU controller determines whether the refrigerant pressure is within the working pressure range based on the pressure value obtained from the monitoring. If the refrigerant pressure is within the working pressure range, it switches to refrigerant cooling and starts the refrigerant fan. If the refrigerant pressure is not within the working pressure range and the pressure is insufficient, it will issue an early alarm.

2. The automatic control method for a refrigerant-based motor cooling and heating system according to claim 1, characterized in that, The motor temperature sensor is provided in two parts. If one of the motor temperature sensors fails, the other temperature sensor can still be used normally, so that the motor will not be burned out.

3. An automatic control method for a motor cooling and heating system based on ceramic plates, characterized in that, The steps are as follows: (1) Through analysis of motor materials, engineers determine the maximum temperature that the motor can withstand, namely the minimum maximum temperature T0 and the maximum maximum temperature T3. Through analysis of motor lubricating oil and sealing materials, engineers determine the motor heating temperature range T0-T1 and the motor cooling temperature range T2-T3, as well as the temperature range T1-T2 where the motor does not require the operation of the refrigerant auxiliary unit during normal operation. (2) The motor temperature sensor, which outputs an analog signal, identifies the internal temperature of the motor. The MCU controller determines whether to start the cooling program, the heating program, or stop the cooling system based on the actual internal temperature Tr of the motor. ① When Tr≤T0, the motor stops and an alarm sounds; ② When T0≤Tr≤T1, the system switches to ceramic plate heating mode. The internal and external air duct fan motor driver drives the fan motor to start the hot and cold fans, turn on the ceramic plate power, and the motor temperature sensor continues to identify the internal temperature of the motor. After the ceramic plate is heated, it is determined whether Tr is heated to Tr≥T1+(T2-T1)×μ. If so, the ceramic plate power is turned off and the hot and cold fans are stopped; otherwise, it waits. ③ When T1≤Tr≤T2, start the motor and determine whether Tr has heated up to Tr≥T1+(T2-T1)×μ. If so, switch to ceramic plate cooling, start the refrigerant fan, turn on the ceramic plate power supply, and continue to identify the internal temperature of the motor by the motor temperature sensor; otherwise, stop the motor, turn off the ceramic plate power supply, and stop the hot and cold fans. ④ When T2≤Tr≤T3, the system switches to ceramic plate cooling mode. The internal and external air duct fan motor drivers drive the fan motors, start the hot and cold fans, turn on the ceramic plate power, and the motor temperature sensor continues to identify the internal temperature of the motor. After starting ceramic plate cooling, it is determined whether Tr has cooled to Tr≤T2+(T3-T2)×μ. If so, the ceramic plate power is turned off and the hot and cold fans are stopped; otherwise, it waits. ⑤ When Tr≥T3, the motor stops and an alarm is triggered.

4. The automatic control method for the motor cooling and heating system based on ceramic plates according to claim 3, characterized in that, The motor temperature sensor is provided in two parts. If one motor temperature sensor fails, the other motor temperature sensor can still be used normally, so the motor will not be burned out.

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