CN114340054A - PTC heating plate and control method thereof - Google Patents
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Abstract
The application provides a PTC heating plate and a control method thereof, which realize automatic control heating, ensure the actual temperature rise and stable interval through a PID algorithm, realize safe heating and dehumidification and have low cost. The method mainly comprises the following steps: the temperature control circuit comprises an MCU, a PTC thermistor and a signal feedback device, wherein the signal feedback device is connected with the input end of the MCU, the signal feedback device is connected with the PTC thermistor and used for sensing the real-time temperature of the PTC thermistor and outputting a real-time temperature signal to the MCU, the output end of the MCU is connected with the PTC thermistor, and the MCU controls the output duty ratio (PWM) of the MCU according to the real-time temperature signal so as to control the temperature of the PTC thermistor.
Description
Technical Field
The invention relates to the technical field of PTC heating plates, in particular to a PTC heating plate and a control method thereof.
Background
PTC (Positive Temperature Coefficient) heating plates on the market are often used for controlling industrial equipment, household appliances, medical equipment yards, household cleaners, new energy vehicles and other equipment. The temperature control of the PTC heater plate is monitored by hardware or external measurement devices, but can exceed the desired control temperature. The PTC heating sheet is based on the principle that the PTC thermistor is heated up by self-heating after being electrified, so that the resistance value enters a jump zone, the PTC thermistor is heated at constant temperature, and the surface temperature is kept. However, the range of the jump region is often very large, and the temperature range required by people is only one temperature range, so that if the temperature is not properly treated in the heating process, the temperature is greatly increased, the contacted skin is easily scalded, even if the skin is heated for a long time, peripheral objects can be ignited, and the service life of the electric heater can be further shortened.
Therefore, the development of a cost-effective PTC heating plate which can be controlled relatively accurately and correctly is needed in the field, so that the product is stable and effective in the using process, the problems of reducing faults and ensuring the service life are the problems to be solved by the current level, and the PTC heating plate can be applied in multiple fields and has a great market prospect.
Disclosure of Invention
The invention aims to provide a PTC heating plate and a control method thereof, which realize automatic control heating, ensure the actual temperature rise and stable interval through a PID algorithm, realize safe heating and dehumidification and have low cost.
A control method of a PTC heating panel, comprising the steps of:
s1, sensing the real-time temperature of the PTC thermistor of the PTC heating plate by the signal feedback device of the PTC heating plate, and reading the real-time temperature signal of the PTC thermistor fed back by the signal feedback device by the MCU of the PTC heating plate in real time;
and S2, the MCU controls the output duty ratio (PWM) of the MCU according to the real-time temperature signal, thereby controlling the temperature of the PTC thermistor.
In some embodiments, the signal feedback device is an NTC (Negative Temperature Coefficient) Temperature Sensor, and the MCU, the PTC thermistor, and the NTC Temperature Sensor are disposed in the same PTC heating plate.
In some embodiments, in step S2, at a moment of power-up, the current value given by the adapter is high, the duty ratio output at the moment of start-up is 8% -12%, the duration is 1S, and then when the real-time temperature is less than 50 ℃, the duty ratio is 96% -98%; when the real-time temperature is more than or equal to 50 ℃, the MCU adjusts the duty ratio in real time according to a PID algorithm, so that the temperature of the PTC thermistor is 53-57 ℃.
Further, the PID algorithm detects a deviation signal by using signal feedback, and controls the controlled quantity by the deviation signal, wherein the feedback signal is a real-time feedback value of the NTC temperature sensor, the deviation signal is a set temperature range, the controlled quantity is a duty ratio required to be output, the duty ratio can be self-adjusted in real time, and the period is 1S.
Further, the PID algorithm is composed of a proportional unit P, an integral unit I and a differential unit D, wherein the proportional unit is used for correcting the deviation of the system, and the proportion can play a role as long as the deviation exists; the integral unit is used for eliminating static difference, the static difference refers to a difference value between input and output after a system is stable, and the integral is accumulated difference value; the differential unit is used for reducing the variation trend of the deviation, adjusting in advance according to the trend of the deviation, improving the reaction speed and reducing the overlarge error caused by overlarge integral accumulation.
Further, the initial values of Kp, Ki and Kd, which are specific proportional parameter values of the three units of the proportional unit P, the integral unit I and the differential unit D, are set, and Kp is 135, Ki is 0.35 and Kd is 2050.
Furthermore, the feedback signal (NTC feedback value) needs to be processed in advance to the limit in the whole algorithm process, the output duty ratio is reduced once the temperature reaches 57 ℃ according to the judgment at present, the output value is 0.01%, the accumulated integral error value is divided by 2 to carry out rapid cooling processing, meanwhile, in the whole integral operation process, the upper limit processing (the upper limit is 6000) is carried out on the accumulated integral error value, and the error is prevented from increasing.
In some embodiments, the host main control board controls the heating function of the PTC heating plate to be turned on and off through a key or a communication protocol, the PTC heating plate performs the heating function of the PTC thermistor to be turned on and off by controlling the high and low levels of the IO port, and the AD port of the MCU outputs a duty cycle to control the temperature of the PTC thermistor.
In some embodiments, the method further includes step S3, the PTC heating plate is connected to the main host control board, the start of the heating function of the PTC heating plate is sent by the main host control board, the main host control board sends a start signal to the PTC heating plate through a key, the start signal is an analog signal, the high level outputs 10ms, the low level outputs 10ms, and the analog signal quantity is sent cyclically all the time; pressing the key again turns off heating, and the main control board of the host does not output analog signals any more; the main control board of the host machine is also provided with a power supply disconnection key, when the power supply disconnection key is pressed down, the PTC heating plate stops heating, and the AD port of the PTC heating plate stops outputting duty ratio.
Further, in the whole heating process, the host main control board and the PTC heating plate always carry out analog signal communication, the communication format is composed of a guide code, a data code and a tail code, the guide code format is that the low level lasts for 700us and then becomes the high level lasts for 6300us, the tail code format is that the low level lasts for 200us and then becomes the high level lasts for 200us, the data code has two types, one type is that the host main control board sends the PTC heating plate and controls the PTC heating control board to carry out heating and non-heating and feed back the fault state in real time, the other type is that the PTC heating plate sends the host control board and always reports the fault state of the heating plate, the two types of data codes comprise the actual data code of the host main control board and also send the inverse code of the data code for checking that the sent code value is correct, the data code here is also an analog signal, the sending bit (bit) is that the format of 0 is that the low level 700us is converted into the high level 1300us, the transmitted bit (bit) is 1 formatted as a low 1300us to high 700us and so on. If byte 0xff is sent, 1300us low transitions high 700us 8 times, sending the entire byte period 16000 us.
A PTC heating panel comprising: the temperature control circuit comprises an MCU, a PTC thermistor and a signal feedback device, wherein the signal feedback device is connected with the input end of the MCU, the signal feedback device is also connected with the PTC thermistor and used for sensing the real-time temperature of the PTC thermistor and outputting a real-time temperature signal to the MCU, the output end of the MCU is connected with the PTC thermistor, and the MCU is used for outputting the duty ratio so as to control the temperature of the PTC thermistor.
In some embodiments, the signal feedback device is an NTC (Negative Temperature Coefficient) Temperature Sensor.
In some embodiments, at a power-on instant, the current value given by the adapter is high, the duty cycle output at the start instant is 8% -12%, the duration is 1S, and then when the real-time temperature is less than 50 ℃, the duty cycle is 96% -98%; when the real-time temperature is more than or equal to 50 ℃, the MCU adjusts the duty ratio in real time according to a PID algorithm, so that the temperature of the PTC thermistor is 53-57 ℃.
Further, the PID algorithm detects a deviation signal by using signal feedback, and controls the controlled quantity by the deviation signal, wherein the feedback signal is a real-time feedback value of the NTC temperature sensor, the deviation signal is a set temperature range, the controlled quantity is a duty ratio required to be output, the duty ratio can be self-adjusted in real time, and the period is 1S.
Further, the PID algorithm is composed of a proportional unit P, an integral unit I and a differential unit D, wherein the proportional unit is used for correcting the deviation of the system, and the proportion can play a role as long as the deviation exists; the integral unit is used for eliminating static difference, the static difference refers to a difference value between input and output after a system is stable, and the integral is accumulated difference value; the differential unit is used for reducing the variation trend of the deviation, adjusting in advance according to the trend of the deviation, improving the reaction speed and reducing the overlarge error caused by overlarge integral accumulation.
Further, the initial values of Kp, Ki and Kd, which are specific proportional parameter values of the three units of the proportional unit P, the integral unit I and the differential unit D, are set, and Kp is 135, Ki is 0.35 and Kd is 2050.
Furthermore, the feedback signal (NTC feedback value) needs to be processed in advance to the limit in the whole algorithm process, the output duty ratio is reduced once the temperature reaches 57 ℃ according to the judgment at present, the output value is 0.01%, the accumulated integral error value is divided by 2 to carry out rapid cooling processing, meanwhile, in the whole integral operation process, the upper limit processing (the upper limit is 6000) is carried out on the accumulated integral error value, and the error is prevented from increasing.
In some embodiments, the host main control board controls the heating function of the PTC heating plate to be turned on and off through a key or a communication protocol, the PTC heating plate performs the heating function of the PTC thermistor to be turned on and off by controlling the high and low levels of the IO port, and the AD port of the MCU outputs a duty cycle to control the temperature of the PTC thermistor.
In some embodiments, the PTC heating plate is connected to a main machine main control board, the start of the heating function of the PTC heating plate is sent by the main machine main control board, the main machine main control board sends a start signal to the PTC heating plate through a key, the signal is an analog signal, the high level outputs 10ms, the low level outputs 10ms, and the analog semaphore is sent cyclically all the time; pressing the key again turns off heating, and the main control board of the host does not output analog signals any more; the main control board of the host machine is also provided with a power supply disconnection key, when the power supply disconnection key is pressed down, the PTC heating plate stops heating, and the AD port of the PTC heating plate stops outputting duty ratio.
Further, in the whole heating process, the host main control board and the PTC heating plate always carry out analog signal communication, the communication format is composed of a guide code, a data code and a tail code, the guide code format is that the low level lasts for 700us and then becomes the high level lasts for 6300us, the tail code format is that the low level lasts for 200us and then becomes the high level lasts for 200us, the data code has two types, one type is that the host main control board sends the PTC heating plate and controls the PTC heating control board to carry out heating and non-heating and feed back the fault state in real time, the other type is that the PTC heating plate sends the host control board and always reports the fault state of the heating plate, the two types of data codes comprise the actual data code of the host main control board and also send the inverse code of the data code for checking that the sent code value is correct, the data code here is also an analog signal, the sending bit (bit) is that the format of 0 is that the low level 700us is converted into the high level 1300us, the transmitted bit (bit) is 1 formatted as a low 1300us to high 700us and so on. If byte 0xff is sent, 1300us low transitions high 700us 8 times, sending the entire byte period 16000 us.
Detailed Description
The following examples are described to aid in the understanding of the present application. The examples are not intended to, and should not be construed in any way to, limit the scope of the present application.
In the following description, those skilled in the art will recognize that components may be described throughout this discussion as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including being integrated within a single system or component).
Further, connections between components or systems are not intended to be limited to direct connections. Rather, data between these components may be modified, reformatted, or otherwise changed by the intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.
Example 1:
a control method of a PTC heating panel, comprising the steps of: s1, sensing the real-time temperature of the PTC thermistor of the PTC heating plate by the signal feedback device of the PTC heating plate, and reading the real-time temperature signal of the PTC thermistor fed back by the signal feedback device by the MCU of the PTC heating plate in real time; and S2, the MCU controls the output duty ratio (PWM) of the AD port of the MCU according to the real-time temperature signal, thereby controlling the temperature of the PTC thermistor.
The signal feedback device is an NTC (Negative Temperature Coefficient) Temperature Sensor, and the MCU, the PTC thermistor and the NTC Temperature Sensor are arranged in the same PTC heating plate. In step S2, at a power-on instant, the current value given by the adapter is high, the duty ratio output at the starting instant is 8% -12%, the duration is 1S, and then when the real-time temperature is less than 50 ℃, the duty ratio is 96% -98%; when the real-time temperature is more than or equal to 50 ℃, the MCU adjusts the duty ratio in real time according to a PID algorithm, so that the temperature of the PTC thermistor is 53-57 ℃.
The PID algorithm detects a deviation signal by using signal feedback, and controls a controlled quantity by the deviation signal, wherein the feedback signal is a real-time feedback value of the NTC temperature sensor, the deviation signal is a set temperature range, the controlled quantity is a duty ratio required to be output, the duty ratio can be self-adjusted in real time, and the period is 1S. The PID algorithm consists of a proportional unit P, an integral unit I and a differential unit D, wherein the proportional unit is used for correcting the deviation of the system, and the proportion can play a role as long as the deviation exists; the integral unit is used for eliminating static difference, the static difference refers to a difference value between input and output after a system is stable, and the integral is accumulated difference value; the differential unit is used for reducing the variation trend of the deviation, adjusting in advance according to the trend of the deviation, improving the reaction speed and reducing the overlarge error caused by overlarge integral accumulation. The initial values of the specific proportional parameter values of the three units of the proportional unit P, the integral unit I and the differential unit D, namely Kp, Ki and Kd, are set, and Kp is 135, Ki is 0.35 and Kd is 2050. In the whole algorithm process, the advance processing of the limit needs to be carried out on the feedback signal (NTC feedback value), the output duty ratio is reduced immediately once the temperature reaches 57 ℃ at present, the output value is 0.01%, the accumulated integral error value is divided by 2 to carry out the rapid cooling processing, and meanwhile, in the whole integral operation process, the upper limit processing (the upper limit is 6000) is carried out on the accumulated integral error value, so that the error is prevented from being larger and larger.
The host main control board can control the opening and closing of the heating function of the PTC heating plate through keys or a communication protocol, the PTC heating plate performs the opening and closing of the heating function of the PTC thermistor through controlling the high and low levels of the IO port, and the AD port of the MCU outputs signals to control the output duty ratio of the PTC thermistor. The method also comprises a step S3, wherein the PTC heating plate is connected with the main control board of the host, the starting of the heating function of the PTC heating plate is realized by sending a starting signal through the main control board of the host, the main control board of the host sends the starting signal to the PTC heating plate through a key, the signal is an analog signal, the high level outputs 10ms, the low level outputs 10ms, and the analog signal quantity is sent in a circulating mode all the time; pressing the key again turns off heating, and the main control board of the host does not output analog signals any more; the main control board of the host machine is also provided with a power supply disconnection key, when the power supply disconnection key is pressed down, the PTC heating plate stops heating, and the AD port of the PTC heating plate stops outputting duty ratio. In the whole heating process, the host main control board and the PTC heating plate always carry out analog signal communication, the communication format is composed of a guide code, a data code and a tail code, the guide code format is that the low level lasts 700us and then becomes high level and lasts 6300us, the tail code format is that the low level lasts 200us and then becomes high level and lasts 200us, the data code has two types, one type is that the host main control board sends the PTC heating plate to control the PTC heating plate to heat and not heat, and feeds back the fault state in real time, the other type is that the PTC heating plate sends the host control board to always report the fault state of the heating plate, the two types of data codes comprise the actual data code of the host main control board and also send the inverse code of the data code, the code value sent is correct, the data code is also an analog signal, the sending bit (bit) is 0 format, the low level is 700us and is converted into the high level 1300us, the transmitted bit (bit) is 1 formatted as a low 1300us to high 700us and so on. If byte 0xff is sent, 1300us low transitions high 700us 8 times, sending the entire byte period 16000 us.
Example 2:
a PTC heating panel comprising: the temperature control circuit comprises an MCU, a PTC thermistor and a signal feedback device, wherein the signal feedback device is connected with the input end of the MCU, the signal feedback device is also connected with the PTC thermistor and used for sensing the real-time temperature of the PTC thermistor and outputting a real-time temperature signal to the MCU, the output end of the MCU is connected with the PTC thermistor, and the MCU is used for outputting a duty ratio to control the temperature of the PTC thermistor.
The signal feedback device is an NTC (Negative Temperature Coefficient) Temperature Sensor. At the moment of power-on, the current value given by the adapter is high, the duty ratio output at the moment of starting is 8% -12%, the duration is 1S, and then when the real-time temperature is less than 50 ℃, the duty ratio is 96% -98%; when the real-time temperature is more than or equal to 50 ℃, the MCU adjusts the duty ratio in real time according to a PID algorithm, so that the temperature of the PTC thermistor is 53-57 ℃. The PID algorithm detects a deviation signal by using signal feedback, and controls a controlled quantity by the deviation signal, wherein the feedback signal is a real-time feedback value of the NTC temperature sensor, the deviation signal is a set temperature range, the controlled quantity is a duty ratio required to be output, the duty ratio can be self-adjusted in real time, and the period is 1S. The PID algorithm consists of a proportional unit P, an integral unit I and a differential unit D, wherein the proportional unit is used for correcting the deviation of the system, and the proportion can play a role as long as the deviation exists; the integral unit is used for eliminating static difference, the static difference refers to a difference value between input and output after a system is stable, and the integral is accumulated difference value; the differential unit is used for reducing the variation trend of the deviation, adjusting in advance according to the trend of the deviation, improving the reaction speed and reducing the overlarge error caused by overlarge integral accumulation. The initial values of the specific proportional parameter values of the three units of the proportional unit P, the integral unit I and the differential unit D, namely Kp, Ki and Kd, are set, and Kp is 135, Ki is 0.35 and Kd is 2050. In the whole algorithm process, the advance processing of the limit needs to be carried out on the feedback signal (NTC feedback value), the output duty ratio is reduced immediately once the temperature reaches 57 ℃ at present, the output value is 0.01%, the accumulated integral error value is divided by 2 to carry out the rapid cooling processing, and meanwhile, in the whole integral operation process, the upper limit processing (the upper limit is 6000) is carried out on the accumulated integral error value, so that the error is prevented from being larger and larger.
The host main control board can control the opening and closing of the heating function of the PTC heating plate through keys or a communication protocol, the PTC heating plate performs the opening and closing of the heating function of the PTC thermistor by controlling the high and low levels of the IO port, and the AD port of the MCU outputs a duty ratio to control the temperature of the PTC thermistor. The PTC heating plate is connected with the main machine main control board, the starting of the heating function of the PTC heating plate is realized by sending a starting signal through the main machine main control board, the main machine main control board sends the starting signal to the PTC heating plate through a key, the signal is an analog signal, the high level outputs 10ms, the low level outputs 10ms, and the analog signal quantity is sent in a circulating mode all the time; pressing the key again turns off heating, and the main control board of the host does not output analog signals any more; the main control board of the host machine is also provided with a power supply disconnection key, when the power supply disconnection key is pressed down, the PTC heating plate stops heating, and the AD port of the PTC heating plate stops outputting duty ratio. In the whole heating process, the host main control board and the PTC heating plate always carry out analog signal communication, the communication format is composed of a guide code, a data code and a tail code, the guide code format is that the low level lasts 700us and then becomes high level and lasts 6300us, the tail code format is that the low level lasts 200us and then becomes high level and lasts 200us, the data code has two types, one type is that the host main control board sends the PTC heating plate to control the PTC heating plate to heat and not heat, and feeds back the fault state in real time, the other type is that the PTC heating plate sends the host control board to always report the fault state of the heating plate, the two types of data codes comprise the actual data code of the host main control board and also send the inverse code of the data code, the code value sent is correct, the data code is also an analog signal, the sending bit (bit) is 0 format, the low level is 700us and is converted into the high level 1300us, the transmitted bit (bit) is 1 formatted as a low 1300us to high 700us and so on. If byte 0xff is sent, 1300us low transitions high 700us 8 times, sending the entire byte period 16000 us.
While various aspects and embodiments have been disclosed herein, it will be apparent to those skilled in the art that other aspects and embodiments can be made without departing from the spirit of the disclosure, and that several modifications and improvements can be made without departing from the spirit of the disclosure. The various aspects and embodiments disclosed herein are presented by way of example only and are not intended to limit the present disclosure, which is to be controlled in the spirit and scope of the appended claims.
Claims (10)
1. A method for controlling a PTC heating plate, comprising the steps of:
s1, sensing the real-time temperature of the PTC thermistor of the PTC heating plate by the signal feedback device of the PTC heating plate, and reading the real-time temperature signal of the PTC thermistor fed back by the signal feedback device by the MCU of the PTC heating plate in real time;
and S2, the MCU controls the output duty ratio of the MCU according to the real-time temperature signal, thereby controlling the temperature of the PTC thermistor.
2. The method of controlling a PTC heating panel according to claim 1, wherein the signal feedback is an NTC temperature sensor, and the MCU, the PTC thermistor and the NTC temperature sensor are provided in the same PTC heating panel.
3. A control method of a PTC heating panel according to claim 1, wherein in step S2, at a moment of power-on, the current value given by the adapter is high, the duty ratio of the output at the moment of start-up is 8% -12%, the duration is 1S, and then when the real-time temperature is < 50 ℃, the duty ratio is 96% -98%; when the real-time temperature is more than or equal to 50 ℃, the MCU adjusts the duty ratio in real time according to a PID algorithm, so that the temperature of the PTC thermistor is 53-57 ℃.
4. The method of controlling a PTC heating panel according to claim 2, comprising one or more features selected from the group consisting of:
(1) the PID algorithm detects a deviation signal by using signal feedback, and controls a controlled quantity by the deviation signal, wherein the feedback signal is a real-time feedback value of the NTC temperature sensor, the deviation signal is a set temperature range, the controlled quantity is a duty ratio required to be output, the duty ratio can be self-adjusted in real time, and the period is 1S;
(2) the PID algorithm consists of a proportional unit P, an integral unit I and a differential unit D, wherein the proportional unit is used for correcting the deviation of the system, and the proportion can play a role as long as the deviation exists; the integral unit is used for eliminating static difference, the static difference refers to a difference value between input and output after a system is stable, and the integral is accumulated difference value; the differential unit is used for reducing the variation trend of the deviation, adjusting in advance according to the trend of the deviation, improving the reaction speed and reducing the overlarge error caused by overlarge integral accumulation;
(3) the initial values of the specific proportional parameter values of the three units of the proportional unit P, the integral unit I and the differential unit D, namely Kp, Ki and Kd, are set, and Kp is 135, Ki is 0.35 and Kd is 2050.
5. A method for controlling a PTC heating panel according to claim 1, further comprising a step S3, in which the PTC heating panel is connected to a main control panel of the host, the start of the heating function of the PTC heating panel is sent by the main control panel of the host, the main control panel of the host sends a start signal to the PTC heating panel by pressing a button, the signal is an analog signal, the high level outputs 10ms, the low level outputs 10ms, and the analog signal is sent cyclically all the time; pressing the key again turns off heating, and the main control board of the host does not output analog signals any more; the main control board of the host machine is also provided with a power supply disconnection key, when the power supply disconnection key is pressed down, the PTC heating plate stops heating, and the AD port of the PTC heating plate stops outputting duty ratio.
6. A PTC heating panel, comprising: the temperature control circuit comprises an MCU, a PTC thermistor and a signal feedback device, wherein the signal feedback device is connected with the input end of the MCU, the signal feedback device is also connected with the PTC thermistor and used for sensing the real-time temperature of the PTC thermistor and outputting a real-time temperature signal to the MCU, the output end of the MCU is connected with the PTC thermistor, and the MCU is used for outputting the duty ratio so as to control the temperature of the PTC thermistor.
7. A PTC heating plate according to claim 6, wherein at the moment of power-on, the adapter gives a high current value, the duty cycle output at the moment of start-up is 8% -12%, the duration is 1S, and then when the real-time temperature is < 50 ℃, the duty cycle is 96% -98%; when the real-time temperature is more than or equal to 50 ℃, the MCU adjusts the duty ratio in real time according to a PID algorithm, so that the temperature of the PTC thermistor is 53-57 ℃.
8. The PTC heating plate of claim 7, comprising one or more features selected from the group consisting of:
(1) the PID algorithm detects a deviation signal by using signal feedback, and controls a controlled quantity by the deviation signal, wherein the feedback signal is a real-time feedback value of the NTC temperature sensor, the deviation signal is a set temperature range, the controlled quantity is a duty ratio required to be output, the duty ratio can be self-adjusted in real time, and the period is 1S;
(2) the PID algorithm consists of a proportional unit P, an integral unit I and a differential unit D, wherein the proportional unit is used for correcting the deviation of the system, and the proportion can play a role as long as the deviation exists; the integral unit is used for eliminating static difference, the static difference refers to a difference value between input and output after a system is stable, and the integral is accumulated difference value; the differential unit is used for reducing the variation trend of the deviation, adjusting in advance according to the trend of the deviation, improving the reaction speed and reducing the overlarge error caused by overlarge integral accumulation;
(3) the initial values of the specific proportional parameter values of the three units of the proportional unit P, the integral unit I and the differential unit D, namely Kp, Ki and Kd, are set, and Kp is 135, Ki is 0.35 and Kd is 2050.
9. A PTC heating plate according to claim 6, wherein the PTC heating plate is connected to a main control board, the start of the heating function of the PTC heating plate is sent by the main control board, the main control board sends a start signal to the PTC heating plate through a key, the signal is an analog signal, the high level outputs 10ms, the low level outputs 10ms, and the analog signal quantity is sent cyclically all the time; pressing the key again turns off heating, and the main control board of the host does not output analog signals any more; the main control board of the host machine is also provided with a power supply disconnection key, when the power supply disconnection key is pressed down, the PTC heating plate stops heating, and the AD port of the PTC heating plate stops outputting duty ratio.
10. A PTC heating panel according to claim 9, wherein during the entire heating process, the host main control panel and the PTC heating panel always communicate analog signals, the communication format is composed of a boot code, a data code, and a tail code, the boot code format is low level for 700us and then high level for 6300us, the tail code format is low level for 200us and then high level for 200us, and there are two types of data codes, one type is that the host main control panel transmits to the PTC heating panel to control the PTC heating panel to heat and not heat, and feed back the fault state in real time, and the other type is that the PTC heating panel transmits to the host control panel to always report the fault state of the heating panel, and the two types of data codes include an actual data code thereof and also an inverse code of the data code for checking that the transmitted code value is correct, where the data code is also an analog signal, the transmission bit is 0 in format of low 700us to high 1300us, and the transmission bit is 1 in format of low 1300us to high 700us, as well as the complement.
Priority Applications (1)
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100738310B1 (en) * | 2006-06-28 | 2007-07-12 | 윤정수 | The electric heat mat controller |
| JP2007283790A (en) * | 2006-04-12 | 2007-11-01 | Auto Network Gijutsu Kenkyusho:Kk | Control device for on-vehicle ptc heater |
| CN105966199A (en) * | 2016-05-20 | 2016-09-28 | 上海英恒电子有限公司 | New energy automobile PTC heating control system and method |
| CN106114141A (en) * | 2016-06-29 | 2016-11-16 | 浙江合众新能源汽车有限公司 | A kind of PTC heat driven system used for electric vehicle |
| CN106166934A (en) * | 2016-08-05 | 2016-11-30 | 惠州市德赛西威汽车电子股份有限公司 | The control system for PTC heater of a kind of automotive air-conditioning controller and method |
| CN106252789A (en) * | 2016-09-13 | 2016-12-21 | 深圳市赛尔盈电子有限公司 | A kind of novel electric vehicle ptc heater and integrated control system |
| CN112189907A (en) * | 2020-09-11 | 2021-01-08 | 惠州市新泓威科技有限公司 | Automatic temperature control method of electronic atomizer and electronic atomizer with same |
-
2021
- 2021-12-28 CN CN202111623110.XA patent/CN114340054B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007283790A (en) * | 2006-04-12 | 2007-11-01 | Auto Network Gijutsu Kenkyusho:Kk | Control device for on-vehicle ptc heater |
| KR100738310B1 (en) * | 2006-06-28 | 2007-07-12 | 윤정수 | The electric heat mat controller |
| CN105966199A (en) * | 2016-05-20 | 2016-09-28 | 上海英恒电子有限公司 | New energy automobile PTC heating control system and method |
| CN106114141A (en) * | 2016-06-29 | 2016-11-16 | 浙江合众新能源汽车有限公司 | A kind of PTC heat driven system used for electric vehicle |
| CN106166934A (en) * | 2016-08-05 | 2016-11-30 | 惠州市德赛西威汽车电子股份有限公司 | The control system for PTC heater of a kind of automotive air-conditioning controller and method |
| CN106252789A (en) * | 2016-09-13 | 2016-12-21 | 深圳市赛尔盈电子有限公司 | A kind of novel electric vehicle ptc heater and integrated control system |
| CN112189907A (en) * | 2020-09-11 | 2021-01-08 | 惠州市新泓威科技有限公司 | Automatic temperature control method of electronic atomizer and electronic atomizer with same |
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| CN114340054B (en) | 2024-01-30 |
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