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How Does Temperature Hysteresis Work? | Advanced PCB Design Blog

Key Takeaways

  • Learn what temperature hysteresis is.

  • Gain an understanding of the accuracy of temperature hysteresis.

  • Acquire some design tips for temperature hysteresis controllers.

Cooking is usually a stress reliever for me but my last attempt at pan-searing sea bass was a struggle. I just couldn’t get the temperature right with my erratic, slow-heating electric stove. Instead of being able to focus on the fish—my main priority—I would have to keep adjusting the knob to correct for a burner that was constantly either too cold or too hot. 

If I had a stove that was smart enough to sustain just the right amount of heat, it would probably come with a built-in temperature hysteresis controller. Let’s look at what temperature hysteresis is, another method for precise temperature control, and some design tips for a temperature hysteresis controller. 

What Is Temperature Hysteresis?

An example of temperature hysteresis with a set point of 80°C.

If you’re using one of the latest computer graphics cards, you’ll probably come across the term “temperature hysteresis” in the settings. Depending on the value that you configure, the graphics card will be cooled to remain within a precise temperature range.

Hysteresis refers to a scenario where changes in a parameter lag behind the force that triggers them. Temperature hysteresis follows the same principle, where a temperature’s rise or fall trails behind the act of supplying or cutting off the heating/cooling supply. It’s a principle that is used for temperature control in various applications.

In a temperature controller, temperature hysteresis is defined by a minimum and maximum temperature value, where the heat will be turned on and off respectively. For example, if the graphics card’s VRM temperature is to be maintained at 80°C with a hysteresis of 5°C, the cooling fan will activate when the temperature reaches 85°C and turn off when the temperature drops to 75°C.

Besides graphics cards, temperature hysteresis can be used to optimize the power efficiency of a room’s temperature control or allow power regulators to reliably function without getting overheated.

How Accurate Is Temperature Hysteresis?

Temperature hysteresis is meant for applications that do not require precise control.

Temperature hysteresis is more accurate than having no regulation at all but it isn’t the most accurate form of temperature control that’s available. The result of temperature hysteresis, when plotted on a chart, is a series of oscillations between the hysteresis window. 

With temperature hysteresis, the temperature of the subject is allowed to fluctuate within a specific range. It’s algorithm isn’t meant to keep the temperature at a specific, set value. Therefore, temperature hysteresis is suitable for applications that do not require high-precision regulation.

If a system demands a precisely regulated temperature, using a PID (proportional-integral-derrivative) controller is a better option. A PID controller’s algorithm is based on the proportional, integral, and derivative constants and it automatically tunes temperature regulation depending on the monitored feedback. The result is a precise temperature value that’s unachievable with temperature hysteresis control.  

Designing a Temperature Hysteresis Controller

A temperature hysteresis controller design starts with a microcontroller.

Due to its simplicity, you’re quite likely to come across a project that requires temperature hysteresis control—perhaps when you place a voltage reference in your PCB layout. Thankfully, building one is reasonably straightforward, but it needs both hardware and firmware to work properly.  

In terms of hardware, you’ll need a microcontroller that’s capable of controlling the heating element and sampling the temperature input. This means a digital output that’s connected to a relay or power MOSFET and an analog input connected to a temperature sensing circuit. 

The microcontroller will need a read/write memory—either an internal EEPROM or battery-backed up RAM—to store the hysteresis values. A user interface must also be built to allow configuration of the minimum and maximum limits. This can be in the form of a keypad, LCD, or connectivity to configuration software. 

The hysteresis controller is then brought to life via the firmware that’s loaded into the microcontroller. The firmware is relatively simple, as it involves sampling temperature input and comparing it against the saved hysteresis limits. It then turns the output on or off based on the measured input.

You shouldn’t have any serious difficulties with hardware design if you’re using the right PCB design and analysis software. Allegro PCB Designer has all the tools needed to design a temperature hysteresis controller with little effort. You can also use InspectAR to accurately assess and improve PCBs using augmented reality and intuitive interaction. Inspecting, debugging, reworking, and assembling PCBs has never been faster or easier.

If you’re looking to learn more about how Cadence has the solution for you, talk to us and our team of experts. 

 

Cadence PCB solutions is a complete front to back design tool to enable fast and efficient product creation. Cadence enables users accurately shorten design cycles to hand off to manufacturing through modern, IPC-2581 industry standard.

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What is temperature hysteresis MSI Afterburner? – BioSidmartin

Popular articles

Esther Fleming

What is temperature hysteresis MSI Afterburner?

In Afterburner, it’s a simple matter of shifting points on a graph to set how fast the fan should be spinning (as a percentage) at certain GPU temperatures. Temperature hysteresis allows the fan speed to “float” as the GPU cools.

What does temperature hysteresis mean?

Hysteresis refers to a scenario where changes in a parameter lag behind the force that triggers them. For example, if the graphics card’s VRM temperature is to be maintained at 80°C with a hysteresis of 5°C, the cooling fan will activate when the temperature reaches 85°C and turn off when the temperature drops to 75°C.

What is temperature hysteresis GPU?

Temperature hysteresis allows the fan speed to “float” as the GPU cools. A setting of five or 10 degrees is recommended, and means the fan will allow the GPU to cool by this amount before switching to a lower fan speed. This helps prevent fluctuating speeds as the temperature crosses the thresholds on the graph.

What is temperature hysteresis EVGA?

Temperatures raise and fall in a fluid motion, so hysteresis setting is the amount of narrowness or wideness of temperature readings. For example, you want your room to be at a constant room temp. So you set your thermostat’s low and high point. This is like hysteresis.

Should I force fan speed update on each period?

fan speed update and hysteresis don’t needed to be used or changed. Forcing fan speed update is a compatability option that probably isn’t needed either. Just set the fan curve on the graph to match the temps you want.

What is a good fan speed update period?

Fan speed update period (in milliseconds):When the value is set increased/decreased, the responding time of Fan speed in the Monitoring Window will be slower/faster. The default value is 5000, and the max/min value will be 60000/100.

What is BH curve?

The B-H curve is generally used to describe the nonlinear behavior of magnetization that a ferromagnetic material obtains in response to an applied magnetic field.

What causes hysteresis loss?

Hysteresis loss is caused by the magnetization and demagnetization of the core as current flows in the forward and reverse directions. As the magnetizing force (current) increases, the magnetic flux increases. In order for the flux density to reach zero, the magnetizing force must be applied in the negative direction.

What is hysteresis setting on a thermostat?

Temperatures raise and fall in a fluid motion, so hysteresis setting is the amount of narrowness or wideness of temperature readings. For example, you want your room to be at a constant room temp. So you set your thermostat’s low and high point. This is like hysteresis. Let’s say the range is 5 degrees around room temp.

What is temperature hysteresis and how accurate is it?

Temperature hysteresis is meant for applications that do not require precise control. Temperature hysteresis is more accurate than having no regulation at all but it isn’t the most accurate form of temperature control that’s available.

What does the lack of hysteresis in this isotherm indicate?

The lack of hysteresis in this isotherm indicates that the matrix changes that occur at 0. 43 aware completely responsible for the apparent hysteresis. Water in a sample is bound to particle surfaces by various bonding mechanisms.

What is hysteresis and how does it work?

Hysteresis refers to a scenario where changes in a parameter lag behind the force that triggers them. Temperature hysteresis follows the same principle, where a temperature’s rise or fall trails behind the act of supplying or cutting off the heating/cooling supply. It’s a principle that is used for temperature control in various applications.

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You can buy Centrifugal Ebmpapst at Olnis wholesale or retail. Let’s deliver Centrifugal Ebmpapst to any region of Russia. We can offer an exact analogue. We work directly with the manufacturer, without using intermediaries.

The RadiFit range of centrifugal fans with double inlet scroll casing and backward curved blades is a new system solution for many applications in industry and ventilation technology. With high efficiency GreenTech EC motors, it delivers high efficiency at high pressures.

They are also extremely compact, strong and light. Best of all, RadiFit fans fit standard fan mounting dimensions. This makes installing and replacing them child’s play.

Typical applications for centrifugal fans in industrial air conditioners

Low profile air conditioner with RadiFi 250mm.

Air-conditioned buildings use warm air to regulate the temperature of the incoming air. In this process, the fans force air through the heat exchanger and then through the air intake and exhaust ducts. Due to strict energy saving regulations, fans must not only be compact and flexibly controllable, but also highly efficient.

Central air conditioner with RadiFit 400 mm.

Air handling units use various components such as filters, heat exchangers, humidifiers and dehumidifiers. The job of fans is to move air through all these components, as well as through an extensive duct system, compensating for high pressure losses. At the same time, the system should take up less space and ensure that many rooms are ventilated according to needs. The solution comes in the form of our new EC centrifugal fans, which are flexible, robust and easy to implement.

Generator cooling with RadiFit 310 mm.

The fan pushes outside air through narrow channels on the generator to cool it. In this application, our centrifugal fans also show all their strengths. The built-in speed controller allows you to adjust the cooling at any time depending on the load or heat dissipation of the generator. However, the fan requires very little installation space as it does not require a separate control box. It is also maintenance free.

Energy efficiency means lower operating costs. Devices with GreenTech EC technology are so much more advanced than conventional solutions that even retrofitting existing units quickly pays for itself. In addition, the new range features a particularly long service life and is completely maintenance-free, further reducing operating and life cycle costs. Finally, solutions are presented complete with housing and installed controlled electronics (VSD). It also keeps your installation costs to a minimum.
Comparison of an obsolete belt drive and a flange-mounted motor clearly shows the difference. Instead of connecting several components to each other with great effort and expense, RadiFit has already integrated everything, combined with minimal dimensions and maximum energy efficiency.

Belt driven centrifugal fans with external control electronics take up a lot of space and require high maintenance costs due to wear parts. Often cheap and inefficient blowers with forward curved blades are used here.

In comparison, the RadiFit GreenTech EC models are impressively efficient and compact. With a simple Plug & Play exchange system, operating and maintenance costs can be greatly reduced.

Centrifugal fans with a standard AC motor are complex systems that require a lot of drive and control space. The
RadiFit impresses with its compact size and efficient GreenTech EC motor control technology. Thanks to the innovative Plug & Play solution, operators can easily upgrade their system and save money in the long run.

Fan complexes are often assembled from various components, mainly from different manufacturers. The user then has to make sure that these components match. It costs time and money.

With ebm-papst’s GreenTech EC solution, the user gets a complete system consisting of motor, impeller and integrated variable speed drive. Everything from a single source and fully customized. This means no additional components and easy commissioning.

Case Features:

  • High Static Pressure
  • High performance at extreme pressures
  • Less pressure loss on full discharge
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  • Scroll body including impeller
  • Inlet nozzle including impeller
  • Impeller, motor, control electronics and housing in one compact unit
  • Small volume design at high flow rates
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  • Housing with discharge and connecting flange
  • Variants with easily movable legs and square frame
  • Standard Metric Installation Dimensions

High Efficiency Impeller:

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  • Aerodynamically optimized blade channel
  • Lower noise level
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  • Proven vibration-isolated suspension
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  • Corrosion resistant aluminum
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GreenTech EC motor:

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  • Impeller mounted directly on the motor rotor
  • High efficiency
  • Low copper and iron losses
  • No slip due to synchronized running
  • No magnetic hysteresis losses in the rotor due to the use of permanent magnets (ferrite)
  • Economy operation
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  • Low Noise
  • Switching and stator design provide low noise field system magnetization
  • High, acoustically imperceptible pulse rate
  • Long life
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Electronics with connection section

  • Infinitely variable speed
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  • Universally applicable for various models
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Performance measurements for all fans are carried out on test benches with front chambers in accordance with ISO 5801. The entire fan assembly, consisting of motor, control electronics, impeller and housing, is measured at various load levels.

The measurement data form the basis for the design program available on request. This software is used to calculate expected operating costs or perform life cycle cost analysis.

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Olnis’s multi-brand supplier offers Ebmpapst centrifugal fans and other brand products. In addition, the site presents industrial equipment from many world manufacturers. Olnisa ​​is a direct supplier, which significantly reduces the cost of the presented equipment.

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Hysteresis motor. Big encyclopedia of technology

Hysteresis motor

A hysteresis motor is a motor based on the hysteresis phenomenon. The main difference from a conventional electric motor is the irreversibility of all processes.

The history of the creation of a hysteresis electric motor

The theory of hysteresis itself was created by Soviet scientists N. S. Akulov, E. I. Kondorsky, S. Vonsovsky and many others. Based on their theories, a hysteresis electric motor was later created.

Types of hysteresis motors

There are three types of hysteresis motors, each of which uses a different type of hysteresis phenomenon.

1. Electric motor using magnetic hysteresis. The very phenomenon of such hysteresis is based on the difference between the magnetization of the body and the magnetic field. In this type of electric motors, under the influence of various factors, a cyclic magnetization reversal of the ferromagnet occurs, which leads to energy losses due to hysteresis. The magnetic hysteresis itself will differ depending on the type of ferromagnet, its heat treatment, the amount of impurities, and many other factors. The most used ferromagnets in magnetic hysteresis electric motors are electrical steel, permalloy, alni, alnico, magnico. Three principles underlie the operation of such electric motors. These are the irreversibility of rotation, the delay in the growth of magnetization reversal nuclei, and the delay in the displacement of boundaries between domains.

2. Electric motor using elastic hysteresis. The basis for the operation of this type of hysteresis electric motor is that residual stresses are created in some ferromagnetic grains due to deformation. There is no single material standard for this type of engine.

3. Electric motor using dielectric hysteresis. They use ferroelectrics (a type of electrically insulating substance), since their dependence on the strength of the electromagnetic field is similar to the dependence of ferromagnets on the magnetizing field. And on the basis of the similarity of the results of the processes occurring with ferromagnets and ferroelectrics, it is precisely the operation of a dielectric hysteresis electric motor that is carried out.

This text is an introductory fragment.

58. ELECTRIC MOTOR

58. ELECTRIC MOTOR
The greatest technical achievement of the late 19th century was the invention of the industrial electric motor. This compact, economical, convenient motor soon became one of the most important elements of production, displacing other types of engines from everywhere,

Asynchronous motor

Asynchronous motor
Asynchronous electric motor — an electric motor with a short-circuited winding. Design, principle of operationAsynchronous electric motors have a simple design and are reliable in operation. The basis of the design is the fixed

Capacitor motor

Capacitor motor
A capacitor motor is a single-phase asynchronous electric motor with two windings on the stator. One of the windings is connected to a capacitor to obtain a rotating magnetic field, where the axis of the windings is located

Repulsion motor

Repulsion motor
A repulsion motor is an alternating current collector motor in which there is one phase and the rotor and stator windings are not electrically interconnected. The single-phase stator winding is powered by AC

Synchronous motor

Synchronous motor
A synchronous motor is a synchronous electrical machine that operates as a motor of higher power than an asynchronous motor.