In this blog, we are gonna explain how to connect a Pt100 sensor to the PID temperature controller. To let this happen, we'll use a humidity sensor, a solid state relay and a conventional relay as well as the Pt100 sensor. Follow us to learn the detailed steps.
In addition to the brushless DC motor is often used in industrial automation, we often see its application in electric vehicles. And what we want to introduce today is an infrastructure that it uses in electric vehicles.
The Pt100 temperature sensor is an instrument that converts a temperature variable into a transmittable, standardized output signal. Pt100 is a platinum thermal resistor, and its resistance will change with temperature. 100 after Pt means that its resistance value is 100 ohms at 0°C, and its resistance value is about 138.5 ohms at 100°C. Mainly used for the measurement and control of industrial process temperature parameters. Its working principle is that when the PT100 is at 0 degrees Celsius, its resistance value is 100 ohms, and its resistance value will increase approximately uniformly as the temperature rises. But the relationship between them is not a simple proportional relationship, but should be closer to a parabola.
To let ATO BLDC motor drive fully perform its speed control function, it is very important for you to make sure that the hall sensor is properly connected to the driver. In this blog we’re gonna illustrate the correct wiring steps.
Variable frequency drive (VFD) is an electric power control equipment that uses frequency conversion technology and micro-electronic technology to control ac motors by changing the frequency of the motor's working power supply. Variable frequency drive by internal IGBT off to adjust the voltage and frequency of the output power supply, according to the actual needs of the motor to provide the required power supply voltage, so as to achieve the purpose of energy saving, speed regulation.
Brushless DC motor is composed of motor body and driver, which is a typical mechatronics product. High speed brushless motor refers to the motor without brush and commutator (collector ring), also known as the motor without commutator. Brushless DC motor is widely used in automobiles, tools, industrial control, automation and so on. We also need to know how to use it. Taking ATO's brushless DC motor as an example, this paper describes how to use external switch button to reverse rotation, stop the motor, and external potentiometer to speed the brushless DC motor.
Variable frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. The VFD adjusts the voltage and frequency of the output power supply by switching on and off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation.
The power system requires a high degree of reliability. During operation, the system may have some abnormal conditions or may cause troublesome problems. Some of these situations are beyond human control and cannot be avoided. Therefore, there is a need for an efficient device to detect such failure conditions and react immediately to minimize damage to the device. Molded case circuit breakers (MCCBs) can help protect equipment. A molded case circuit breaker (MCCB) is a device that protects low-voltage power distribution systems from overloads and short circuits. Molded case circuit breakers allow quick reactivation of a circuit after clearing a short circuit or overload. MCCBs (molded case circuit breakers) can easily identify the difference between an overcurrent and a short circuit. It allows a slight overcurrent for a while, but turns on faster as the current level increases. MCCB can be used to complete protection and disconnection functions.
The function of the weighing sensor can be shown only when the weighing sensor is equipped with a good weighing display instrument. We are going to introduce the wiring and calibration of ATA-DDC5-CHB universal weighing instrument.
A load cell is actually a device that converts a mass signal into measurable electrical output. ATO has introduced how to convert the m V model output by the pressure sensor into a 4-20mA standard analog signal. But in the industrial control process, digital signals are also extremely important, so this time ATO will explain the RS485 interface function ( Modbus RTU protocol ) of the load cell transmitter.
The contactor of CJX2 series we are going to use is type 4NO, type 3NO and type 2NO+2NC. The main contact point has different performance in 220V~660V. The control coil voltage is 110VAC, 220VAC, 24VAC and 24VDC, and the 220VAC is used this time.
In a previous blog, we talked about how to use the external terminals to control the direction, start and stop of the VFD. However we found a problem, that is, the speed regulation of the VFD still needs to use the VFD control panel, so this time we will tell you how to use the external potentiometer to adjust the speed of the ATO variable frequency drive.
The common control methods of VFD are panel control, terminal control, and Modbus RTU control. The panel control is the simplest, only need to connect the power cable and motor cable, and set the parameters to control the speed and direction of the motor. The terminal control and Modbus RTU control methods are more complicated. The following will show you how to How to control VFD with push button switch/terminal control/wire control
We covered how to calibrate the load cell and connect it to the load display in our previous blog. In the process of using the sensor, sometimes we need the standard analog signal of the sensor, so we need a transmitter to convert the mV signal of the load cell into standard industrial signals, such as 0-20mA, 4-20mA, 0-10V, etc. ATO load cell transmitter is the protagonist of our introduction, its output signal is 4~20mA.
Safety light curtain is also photoelectric safety protection device (also known as safety protector, punch protector, infrared safety protection device, etc.), generally speaking, safety light curtain exists in pairs, divided into the transmitting end and the receiving end. It is to avoid personnel close to the moving machinery of a photoelectric equipment, can avoid casualties.
Solid state relay has reliable operation, long life, no noise, no spark, no electromagnetic interference, fast switching speed, strong anti-interference ability, and small size, impact resistance, oscillation resistance, explosion-proof, moisture-proof, anti-corrosion, compatible with TTL, DTL, HTL and other logic circuits, with small control signals to directly drive large current load.
After the sensor is powered on, a green light will be emitted through the lens, and the light-colored plane will gradually approach the light source. When the set distance is reached, the sensor signal output will be triggered. When the dark block is moved to the light source of the sensor, it can be found that the trigger of the sensor is relieved. We can also adjust the sensitivity through a knob.
Fiber optic amplifier can be used as a type of beam or diffuse sensor. The combination of fiber amplifiers and fiber sensing can meet the induction requirements of complex and variable industrial automation systems. Optical fiber can be easily integrated in space limited places to solve the problem of difficult signal collection; Fiber optic sensor can process signals with high precision and convert different information to output to automatic systems.
The rotary encoder is a device used to measure the speed and cooperate with PWM technology to realize rapid speed regulation. The photoelectric rotary encoder can convert the angular displacement, angular velocity and other mechanical quantities of the output shaft into corresponding electrical pulses through photoelectric conversion. output (REP). Divided into single output and dual output. The technical parameters mainly include the number of pulses per revolution (dozens to thousands), and the power supply voltage. Single output means that the output of the rotary encoder is a set of pulses, while the rotary encoder with double output outputs two sets of pulses with phase A/ B difference of 90 degrees. Through these two sets of pulses, not only the speed can be measured, but also the rotation can be judged direction.
Proximity sensor is a new type of integrated switch, which is an ideal electronic switch sensor. It has a lot of advantages, including small size, fast frequency response, wide voltage range, strong anti-interference ability, high repositioning accuracy, high operating frequency, reliable operation, long life, low power consumption, corrosion resistance, vibration resistance and adaptability to harsh working environments. What’s more, there will be no friction during the use of the proximity sensor, and will not increase the torque of each sensed element.
